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Merge branch 'master' into jgrpp

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# Conflicts:
#	src/elrail.cpp
#	src/ground_vehicle.hpp
#	src/landscape.cpp
#	src/saveload/afterload.cpp
#	src/saveload/saveload.h
#	src/tile_cmd.h
#	src/town_cmd.cpp
#	src/tunnelbridge_cmd.cpp
pull/510/head
Jonathan G Rennison 1 year ago
parent eff2a1669f c6ff7dad68
commit 9521e7ef2b
31 changed files with 780 additions and 184 deletions
Show Stats Download Patch File Download Diff File

1
src/CMakeLists.txt
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@ -23,6 +23,7 @@ add_subdirectory(saveload)
add_subdirectory(sound)
add_subdirectory(spriteloader)
add_subdirectory(table)
add_subdirectory(tests)
add_subdirectory(video)
add_subdirectory(widgets)

2
src/clear_cmd.cpp
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@ -197,7 +197,7 @@ static void DrawTile_Clear(TileInfo *ti, DrawTileProcParams params)
DrawBridgeMiddle(ti);
}
static int GetSlopePixelZ_Clear(TileIndex tile, uint x, uint y)
static int GetSlopePixelZ_Clear(TileIndex tile, uint x, uint y, bool ground_vehicle)
{
int z;
Slope tileh = GetTilePixelSlope(tile, &z);

2
src/core/bitmath_func.hpp
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@ -31,7 +31,7 @@
* @return The selected bits, aligned to a LSB.
*/
template <typename T>
debug_inline static uint GB(const T x, const uint8 s, const uint8 n)
debug_inline constexpr static uint GB(const T x, const uint8 s, const uint8 n)
{
return (x >> s) & (((T)1U << n) - 1);
}

2
src/core/math_func.hpp
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@ -224,7 +224,7 @@ static inline bool IsInsideBS(const T x, const size_t base, const size_t size)
* @see IsInsideBS()
*/
template <typename T>
static inline bool IsInsideMM(const T x, const size_t min, const size_t max)
static inline constexpr bool IsInsideMM(const T x, const size_t min, const size_t max)
{
return (size_t)(x - min) < (max - min);
}

4
src/elrail.cpp
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@ -266,7 +266,7 @@ static int GetPCPElevation(TileIndex tile, DiagDirection PCPpos)
*/
int z = GetSlopePixelZ(TileX(tile) * TILE_SIZE + std::min<int8>(x_pcp_offsets[PCPpos], TILE_SIZE - 1),
TileY(tile) * TILE_SIZE + std::min<int8>(y_pcp_offsets[PCPpos], TILE_SIZE - 1));
TileY(tile) * TILE_SIZE + std::min<int8>(y_pcp_offsets[PCPpos], TILE_SIZE - 1), true);
return (z + 2) & ~3; // this means z = (z + TILE_HEIGHT / 4) / (TILE_HEIGHT / 2) * (TILE_HEIGHT / 2);
}
@ -591,7 +591,7 @@ static void DrawRailCatenaryRailway(const TileInfo *ti)
* down to the nearest full height change.
*/
AddSortableSpriteToDraw(wire_base + sss->image_offset, PAL_NONE, ti->x + sss->x_offset, ti->y + sss->y_offset,
sss->x_size, sss->y_size, sss->z_size, (GetSlopePixelZ(ti->x + sss->x_offset, ti->y + sss->y_offset) + 4) / 8 * 8 + sss->z_offset,
sss->x_size, sss->y_size, sss->z_size, (GetSlopePixelZ(ti->x + sss->x_offset, ti->y + sss->y_offset, true) + 4) / 8 * 8 + sss->z_offset,
IsTransparencySet(TO_CATENARY));
}
}

27
src/ground_vehicle.hpp
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@ -151,7 +151,7 @@ struct GroundVehicle : public SpecializedVehicle<T, Type> {
*/
inline void UpdateZPositionAndInclination()
{
this->z_pos = GetSlopePixelZ(this->x_pos, this->y_pos);
this->z_pos = GetSlopePixelZ(this->x_pos, this->y_pos, true);
ClrBit(this->gv_flags, GVF_GOINGUP_BIT);
ClrBit(this->gv_flags, GVF_GOINGDOWN_BIT);
@ -160,7 +160,7 @@ struct GroundVehicle : public SpecializedVehicle<T, Type> {
* direction it is sloped, we get the 'z' at the center of
* the tile (middle_z) and the edge of the tile (old_z),
* which we then can compare. */
int middle_z = GetSlopePixelZ((this->x_pos & ~TILE_UNIT_MASK) | (TILE_SIZE / 2), (this->y_pos & ~TILE_UNIT_MASK) | (TILE_SIZE / 2));
int middle_z = GetSlopePixelZ((this->x_pos & ~TILE_UNIT_MASK) | (TILE_SIZE / 2), (this->y_pos & ~TILE_UNIT_MASK) | (TILE_SIZE / 2), true);
if (middle_z != this->z_pos) {
SetBit(this->gv_flags, (middle_z > this->z_pos) ? GVF_GOINGUP_BIT : GVF_GOINGDOWN_BIT);
@ -183,25 +183,25 @@ struct GroundVehicle : public SpecializedVehicle<T, Type> {
if (HasBit(this->gv_flags, GVF_GOINGUP_BIT)) {
switch (this->direction) {
case DIR_NE:
this->z_pos += (this->x_pos & 1); break;
case DIR_SW:
this->z_pos += (this->x_pos & 1) ^ 1; break;
case DIR_SW:
this->z_pos += (this->x_pos & 1); break;
case DIR_NW:
this->z_pos += (this->y_pos & 1); break;
case DIR_SE:
this->z_pos += (this->y_pos & 1) ^ 1; break;
case DIR_SE:
this->z_pos += (this->y_pos & 1); break;
default: break;
}
} else if (HasBit(this->gv_flags, GVF_GOINGDOWN_BIT)) {
switch (this->direction) {
case DIR_NE:
this->z_pos -= (this->x_pos & 1); break;
case DIR_SW:
this->z_pos -= (this->x_pos & 1) ^ 1; break;
case DIR_SW:
this->z_pos -= (this->x_pos & 1); break;
case DIR_NW:
this->z_pos -= (this->y_pos & 1); break;
case DIR_SE:
this->z_pos -= (this->y_pos & 1) ^ 1; break;
case DIR_SE:
this->z_pos -= (this->y_pos & 1); break;
default: break;
}
}
@ -218,7 +218,7 @@ struct GroundVehicle : public SpecializedVehicle<T, Type> {
if (HasBit(this->gv_flags, GVF_GOINGUP_BIT) || HasBit(this->gv_flags, GVF_GOINGDOWN_BIT)) {
if (T::From(this)->HasToUseGetSlopePixelZ()) {
/* In some cases, we have to use GetSlopePixelZ() */
this->z_pos = GetSlopePixelZ(this->x_pos, this->y_pos);
this->z_pos = GetSlopePixelZ(this->x_pos, this->y_pos, true);
return;
}
/* DirToDiagDir() is a simple right shift */
@ -230,8 +230,7 @@ struct GroundVehicle : public SpecializedVehicle<T, Type> {
int8 d = DiagDirToAxis(dir) == AXIS_X ? x_pos : y_pos;
/* We need only the least significant bit */
d &= 1;
/* Conditional "^ 1". Optimised to "(dir - 1) <= 1". */
d ^= (int8)(dir == DIAGDIR_SW || dir == DIAGDIR_SE);
d ^= (int8)(dir == DIAGDIR_NW || dir == DIAGDIR_NE);
/* Subtraction instead of addition because we are testing for GVF_GOINGUP_BIT.
* GVF_GOINGUP_BIT is used because it's bit 0, so simple AND can be used,
* without any shift */
@ -239,7 +238,7 @@ struct GroundVehicle : public SpecializedVehicle<T, Type> {
}
#ifdef _DEBUG
assert(this->z_pos == GetSlopePixelZ(this->x_pos, this->y_pos));
assert(this->z_pos == GetSlopePixelZ(this->x_pos, this->y_pos, true));
#endif
if (HasBit(this->gv_flags, GVF_CHUNNEL_BIT) && !IsTunnelTile(this->tile)) {

2
src/industry_cmd.cpp
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@ -387,7 +387,7 @@ static void DrawTile_Industry(TileInfo *ti, DrawTileProcParams params)
}
}
static int GetSlopePixelZ_Industry(TileIndex tile, uint x, uint y)
static int GetSlopePixelZ_Industry(TileIndex tile, uint x, uint y, bool ground_vehicle)
{
return GetTileMaxPixelZ(tile);
}

186
src/landscape.cpp
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@ -226,144 +226,112 @@ uint ApplyFoundationToSlope(Foundation f, Slope *s)
/**
* Determines height at given coordinate of a slope
* @param x x coordinate
* @param y y coordinate
* Determines height at given coordinate of a slope.
*
* At the northern corner (0, 0) the result is always a multiple of TILE_HEIGHT.
* When the height is a fractional Z, then the height is rounded down. For example,
* when at the height is 0 at x = 0 and the height is 8 at x = 16 (actually x = 0
* of the next tile), then height is 0 at x = 1, 1 at x = 2, and 7 at x = 15.
* @param x x coordinate (value from 0 to 15)
* @param y y coordinate (value from 0 to 15)
* @param corners slope to examine
* @return height of given point of given slope
*/
uint GetPartialPixelZ(int x, int y, Slope corners)
static constexpr uint InternalGetPartialPixelZ(int x, int y, Slope corners)
{
if (IsHalftileSlope(corners)) {
/* A foundation is placed on half the tile at a specific corner. This means that,
* depending on the corner, that one half of the tile is at the maximum height. */
switch (GetHalftileSlopeCorner(corners)) {
case CORNER_W:
if (x - y >= 0) return GetSlopeMaxPixelZ(corners);
if (x > y) return GetSlopeMaxPixelZ(corners);
break;
case CORNER_S:
if (x - (y ^ 0xF) >= 0) return GetSlopeMaxPixelZ(corners);
if (x + y >= (int)TILE_SIZE) return GetSlopeMaxPixelZ(corners);
break;
case CORNER_E:
if (y - x >= 0) return GetSlopeMaxPixelZ(corners);
if (x <= y) return GetSlopeMaxPixelZ(corners);
break;
case CORNER_N:
if ((y ^ 0xF) - x >= 0) return GetSlopeMaxPixelZ(corners);
if (x + y < (int)TILE_SIZE) return GetSlopeMaxPixelZ(corners);
break;
default: NOT_REACHED();
}
}
int z = 0;
switch (RemoveHalftileSlope(corners)) {
case SLOPE_W:
if (x - y >= 0) {
z = (x - y) >> 1;
}
break;
case SLOPE_S:
y ^= 0xF;
if ((x - y) >= 0) {
z = (x - y) >> 1;
}
break;
case SLOPE_SW:
z = (x >> 1) + 1;
break;
case SLOPE_E:
if (y - x >= 0) {
z = (y - x) >> 1;
}
break;
case SLOPE_EW:
case SLOPE_NS:
case SLOPE_ELEVATED:
z = 4;
break;
case SLOPE_SE:
z = (y >> 1) + 1;
break;
case SLOPE_WSE:
z = 8;
y ^= 0xF;
if (x - y < 0) {
z += (x - y) >> 1;
}
break;
case SLOPE_N:
y ^= 0xF;
if (y - x >= 0) {
z = (y - x) >> 1;
}
break;
case SLOPE_NW:
z = (y ^ 0xF) >> 1;
break;
case SLOPE_NWS:
z = 8;
if (x - y < 0) {
z += (x - y) >> 1;
}
break;
case SLOPE_FLAT: return 0;
/* One corner is up.*/
case SLOPE_N: return x + y <= (int)TILE_SIZE ? (TILE_SIZE - x - y) >> 1 : 0;
case SLOPE_E: return y >= x ? (1 + y - x) >> 1 : 0;
case SLOPE_S: return x + y >= (int)TILE_SIZE ? (1 + x + y - TILE_SIZE) >> 1 : 0;
case SLOPE_W: return x >= y ? (x - y) >> 1 : 0;
/* Two corners next to eachother are up. */
case SLOPE_NE: return (TILE_SIZE - x) >> 1;
case SLOPE_SE: return (y + 1) >> 1;
case SLOPE_SW: return (x + 1) >> 1;
case SLOPE_NW: return (TILE_SIZE - y) >> 1;
/* Three corners are up on the same level. */
case SLOPE_ENW: return x + y >= (int)TILE_SIZE ? TILE_HEIGHT - ((1 + x + y - TILE_SIZE) >> 1) : TILE_HEIGHT;
case SLOPE_SEN: return y < x ? TILE_HEIGHT - ((x - y) >> 1) : TILE_HEIGHT;
case SLOPE_WSE: return x + y <= (int)TILE_SIZE ? TILE_HEIGHT - ((TILE_SIZE - x - y) >> 1) : TILE_HEIGHT;
case SLOPE_NWS: return x < y ? TILE_HEIGHT - ((1 + y - x) >> 1) : TILE_HEIGHT;
/* Two corners at opposite sides are up. */
case SLOPE_NS: return x + y < (int)TILE_SIZE ? (TILE_SIZE - x - y) >> 1 : (1 + x + y - TILE_SIZE) >> 1;
case SLOPE_EW: return x >= y ? (x - y) >> 1 : (1 + y - x) >> 1;
/* Very special cases. */
case SLOPE_ELEVATED: return TILE_HEIGHT;
/* Steep slopes. The top is at 2 * TILE_HEIGHT. */
case SLOPE_STEEP_N: return (TILE_SIZE - x + TILE_SIZE - y) >> 1;
case SLOPE_STEEP_E: return (TILE_SIZE + 1 + y - x) >> 1;
case SLOPE_STEEP_S: return (1 + x + y) >> 1;
case SLOPE_STEEP_W: return (TILE_SIZE + x - y) >> 1;
case SLOPE_NE:
z = (x ^ 0xF) >> 1;
break;
case SLOPE_ENW:
z = 8;
y ^= 0xF;
if (y - x < 0) {
z += (y - x) >> 1;
}
break;
case SLOPE_SEN:
z = 8;
if (y - x < 0) {
z += (y - x) >> 1;
}
break;
case SLOPE_STEEP_S:
z = 1 + ((x + y) >> 1);
break;
case SLOPE_STEEP_W:
z = 1 + ((x + (y ^ 0xF)) >> 1);
break;
case SLOPE_STEEP_N:
z = 1 + (((x ^ 0xF) + (y ^ 0xF)) >> 1);
break;
case SLOPE_STEEP_E:
z = 1 + (((x ^ 0xF) + y) >> 1);
break;
default: break;
default: NOT_REACHED();
}
}
return z;
#include "tests/landscape_partial_pixel_z.h"
/**
* Determines height at given coordinate of a slope.
* See #InternalGetPartialPixelZ.
* @param x x coordinate (value from 0 to 15)
* @param y y coordinate (value from 0 to 15)
* @param corners slope to examine
* @return height of given point of given slope
*/
uint GetPartialPixelZ(int x, int y, Slope corners)
{
return InternalGetPartialPixelZ(x, y, corners);
}
int GetSlopePixelZ(int x, int y)
/**
* Return world \c Z coordinate of a given point of a tile. Normally this is the
* Z of the ground/foundation at the given location, but in some cases the
* ground/foundation can differ from the Z coordinate that the (ground) vehicle
* passing over it would take. For example when entering a tunnel or bridge.
*
* @param x World X coordinate in tile "units".
* @param y World Y coordinate in tile "units".
* @param ground_vehicle Whether to get the Z coordinate of the ground vehicle, or the ground.
* @return World Z coordinate at tile ground (vehicle) level, including slopes and foundations.
*/
int GetSlopePixelZ(int x, int y, bool ground_vehicle)
{
TileIndex tile = TileVirtXY(x, y);
return _tile_type_procs[GetTileType(tile)]->get_slope_z_proc(tile, x, y);
return _tile_type_procs[GetTileType(tile)]->get_slope_z_proc(tile, x, y, ground_vehicle);
}
/**
@ -377,9 +345,9 @@ int GetSlopePixelZ(int x, int y)
int GetSlopePixelZOutsideMap(int x, int y)
{
if (IsInsideBS(x, 0, MapSizeX() * TILE_SIZE) && IsInsideBS(y, 0, MapSizeY() * TILE_SIZE)) {
return GetSlopePixelZ(x, y);
return GetSlopePixelZ(x, y, false);
} else {
return _tile_type_procs[MP_VOID]->get_slope_z_proc(INVALID_TILE, x, y);
return _tile_type_procs[MP_VOID]->get_slope_z_proc(INVALID_TILE, x, y, false);
}
}

4
src/landscape.h
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@ -67,7 +67,7 @@ Slope GetFoundationSlopeFromTileSlope(TileIndex tile, Slope tileh, int *z = null
Slope GetFoundationSlope(TileIndex tile, int *z = nullptr);
uint GetPartialPixelZ(int x, int y, Slope corners);
int GetSlopePixelZ(int x, int y);
int GetSlopePixelZ(int x, int y, bool ground_vehicle = false);
int GetSlopePixelZOutsideMap(int x, int y);
void GetSlopePixelZOnEdge(Slope tileh, DiagDirection edge, int *z1, int *z2);
@ -127,7 +127,7 @@ static inline Point RemapCoords(int x, int y, int z)
*/
static inline Point RemapCoords2(int x, int y)
{
return RemapCoords(x, y, GetSlopePixelZ(x, y));
return RemapCoords(x, y, GetSlopePixelZ(x, y, false));
}
/**

2
src/object_cmd.cpp
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@ -659,7 +659,7 @@ static void DrawTile_Object(TileInfo *ti, DrawTileProcParams params)
DrawBridgeMiddle(ti);
}
static int GetSlopePixelZ_Object(TileIndex tile, uint x, uint y)
static int GetSlopePixelZ_Object(TileIndex tile, uint x, uint y, bool ground_vehicle)
{
if (IsObjectType(tile, OBJECT_OWNED_LAND)) {
int z;

4
src/pathfinder/npf/npf.cpp
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@ -226,8 +226,8 @@ static uint NPFSlopeCost(AyStarNode *current)
/* Get the height on both sides of the tile edge.
* Avoid testing the height on the tile-center. This will fail for halftile-foundations.
*/
int z1 = GetSlopePixelZ(x1 + dx4, y1 + dy4);
int z2 = GetSlopePixelZ(x2 - dx4, y2 - dy4);
int z1 = GetSlopePixelZ(x1 + dx4, y1 + dy4, true);
int z2 = GetSlopePixelZ(x2 - dx4, y2 - dy4, true);
if (z2 - z1 > 1) {
/* Slope up */

4
src/pathfinder/yapf/yapf_road.cpp
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@ -53,12 +53,12 @@ protected:
/* height of the center of the current tile */
int x1 = TileX(tile) * TILE_SIZE;
int y1 = TileY(tile) * TILE_SIZE;
int z1 = GetSlopePixelZ(x1 + TILE_SIZE / 2, y1 + TILE_SIZE / 2);
int z1 = GetSlopePixelZ(x1 + TILE_SIZE / 2, y1 + TILE_SIZE / 2, true);
/* height of the center of the next tile */
int x2 = TileX(next_tile) * TILE_SIZE;
int y2 = TileY(next_tile) * TILE_SIZE;
int z2 = GetSlopePixelZ(x2 + TILE_SIZE / 2, y2 + TILE_SIZE / 2);
int z2 = GetSlopePixelZ(x2 + TILE_SIZE / 2, y2 + TILE_SIZE / 2, true);
if (z2 - z1 > 1) {
/* Slope up */

2
src/pbs.cpp
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@ -439,7 +439,7 @@ static PBSTileInfo FollowReservation(Owner o, RailTypes rts, TileIndex tile, Tra
default: NOT_REACHED();
}
}
z = GetSlopePixelZ(x, y);
z = GetSlopePixelZ(x, y, true);
}
}
};

2
src/rail_cmd.cpp
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@ -3752,7 +3752,7 @@ void DrawTrainDepotSprite(int x, int y, int dir, RailType railtype)
DrawRailTileSeqInGUI(x, y, dts, offset, 0, palette);
}
static int GetSlopePixelZ_Track(TileIndex tile, uint x, uint y)
static int GetSlopePixelZ_Track(TileIndex tile, uint x, uint y, bool ground_vehicle)
{
if (IsPlainRail(tile)) {
int z;

2
src/road_cmd.cpp
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@ -2494,7 +2494,7 @@ void UpdateNearestTownForRoadTiles(bool invalidate)
}
}
static int GetSlopePixelZ_Road(TileIndex tile, uint x, uint y)
static int GetSlopePixelZ_Road(TileIndex tile, uint x, uint y, bool ground_vehicle)
{
if (IsNormalRoad(tile)) {

4
src/roadveh_cmd.cpp
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@ -288,7 +288,7 @@ CommandCost CmdBuildRoadVehicle(TileIndex tile, DoCommandFlag flags, const Engin
int y = TileY(tile) * TILE_SIZE + TILE_SIZE / 2;
v->x_pos = x;
v->y_pos = y;
v->z_pos = GetSlopePixelZ(x, y);
v->z_pos = GetSlopePixelZ(x, y, true);
v->state = RVSB_IN_DEPOT;
v->vehstatus = VS_HIDDEN | VS_STOPPED | VS_DEFPAL;
@ -2013,7 +2013,7 @@ again:
* A vehicle has to spend at least 9 frames on a tile, so the following articulated part can follow.
* (The following part may only be one tile behind, and the front part is moved before the following ones.)
* The short (inner) curve has 8 frames, this elongates it to 10. */
v->UpdateInclination(false, true);
v->UpdateViewport(true, true);
return true;
}

56
src/saveload/afterload.cpp
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@ -569,12 +569,12 @@ static uint FixVehicleInclination(Vehicle *v, Direction dir)
case INVALID_DIR: break;
default: NOT_REACHED();
}
byte entry_z = GetSlopePixelZ(entry_x, entry_y);
byte entry_z = GetSlopePixelZ(entry_x, entry_y, true);
/* Compute middle of the tile. */
int middle_x = (v->x_pos & ~TILE_UNIT_MASK) + TILE_SIZE / 2;
int middle_y = (v->y_pos & ~TILE_UNIT_MASK) + TILE_SIZE / 2;
byte middle_z = GetSlopePixelZ(middle_x, middle_y);
byte middle_z = GetSlopePixelZ(middle_x, middle_y, true);
/* middle_z == entry_z, no height change. */
if (middle_z == entry_z) return 0;
@ -586,6 +586,25 @@ static uint FixVehicleInclination(Vehicle *v, Direction dir)
return 1U << GVF_GOINGUP_BIT;
}
/**
* Check whether the ground vehicles are at the correct Z-coordinate. When they
* are not, this will cause all kinds of problems later on as the vehicle might
* not get onto bridges and so on.
*/
static void CheckGroundVehiclesAtCorrectZ()
{
for (Vehicle *v : Vehicle::Iterate()) {
if (v->IsGroundVehicle()) {
/*
* Either the vehicle is not actually on the given tile, i.e. it is
* in the wormhole of a bridge or a tunnel, or the Z-coordinate must
* be the same as when it would be recalculated right now.
*/
assert(v->tile != TileVirtXY(v->x_pos, v->y_pos) || v->z_pos == GetSlopePixelZ(v->x_pos, v->y_pos, true));
}
}
}
/**
* Checks for the possibility that a bridge may be on this tile
* These are in fact all the tile types on which a bridge can be found
@ -1440,7 +1459,7 @@ bool AfterLoadGame()
case DIAGDIR_SW: if ((v->x_pos & 0xF) != TILE_SIZE - 1) continue; break;
case DIAGDIR_NW: if ((v->y_pos & 0xF) != 0) continue; break;
}
} else if (v->z_pos > GetSlopePixelZ(v->x_pos, v->y_pos)) {
} else if (v->z_pos > GetTileMaxPixelZ(TileVirtXY(v->x_pos, v->y_pos))) {
v->tile = GetNorthernBridgeEnd(v->tile);
v->UpdatePosition();
} else {
@ -2895,7 +2914,7 @@ bool AfterLoadGame()
if (!IsTunnelTile(vtile)) continue;
/* Are we actually in this tunnel? Or maybe a lower tunnel? */
if (GetSlopePixelZ(v->x_pos, v->y_pos) != v->z_pos) continue;
if (GetSlopePixelZ(v->x_pos, v->y_pos, true) != v->z_pos) continue;
/* What way are we going? */
const DiagDirection dir = GetTunnelBridgeDirection(vtile);
@ -2974,6 +2993,23 @@ bool AfterLoadGame()
}
}
if (IsSavegameVersionBefore(SLV_CONSISTENT_PARTIAL_Z) && SlXvIsFeatureMissing(XSLFI_CONSISTENT_PARTIAL_Z)) {
/*
* The logic of GetPartialPixelZ has been changed, so the resulting Zs on
* the map are consistent. This requires that the Z position of some
* vehicles is updated to reflect this new situation.
*
* This needs to be before SLV_158, because that performs asserts using
* GetSlopePixelZ which internally uses GetPartialPixelZ.
*/
for (Vehicle *v : Vehicle::Iterate()) {
if (v->IsGroundVehicle() && TileVirtXY(v->x_pos, v->y_pos) == v->tile) {
/* Vehicle is on the ground, and not in a wormhole. */
v->z_pos = GetSlopePixelZ(v->x_pos, v->y_pos, true);
}
}
}
if (IsSavegameVersionBefore(SLV_158)) {
for (Vehicle *v : Vehicle::Iterate()) {
switch (v->type) {
@ -3040,7 +3076,7 @@ bool AfterLoadGame()
/* In old versions, z_pos was 1 unit lower on bridge heads.
* However, this invalid state could be converted to new savegames
* by loading and saving the game in a new version. */
v->z_pos = GetSlopePixelZ(v->x_pos, v->y_pos);
v->z_pos = GetSlopePixelZ(v->x_pos, v->y_pos, true);
DiagDirection dir = GetTunnelBridgeDirection(v->tile);
if (v->type == VEH_TRAIN && !(v->vehstatus & VS_CRASHED) &&
v->direction != DiagDirToDir(dir)) {
@ -3054,7 +3090,7 @@ bool AfterLoadGame()
/* If the vehicle is really above v->tile (not in a wormhole),
* it should have set v->z_pos correctly. */
assert(v->tile != TileVirtXY(v->x_pos, v->y_pos) || v->z_pos == GetSlopePixelZ(v->x_pos, v->y_pos));
assert(v->tile != TileVirtXY(v->x_pos, v->y_pos) || v->z_pos == GetSlopePixelZ(v->x_pos, v->y_pos, true));
}
/* Fill Vehicle::cur_real_order_index */
@ -4209,6 +4245,14 @@ bool AfterLoadGame()
AfterLoad_LinkGraphPauseControl();
}
if (SlXvIsFeatureMissing(XSLFI_CONSISTENT_PARTIAL_Z)) {
CheckGroundVehiclesAtCorrectZ();
} else {
#ifdef _DEBUG
CheckGroundVehiclesAtCorrectZ();
#endif
}
_game_load_cur_date_ymd = _cur_date_ymd;
_game_load_date_fract = _date_fract;
_game_load_tick_skip_counter = _tick_skip_counter;

1
src/saveload/extended_ver_sl.cpp
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@ -194,6 +194,7 @@ const SlxiSubChunkInfo _sl_xv_sub_chunk_infos[] = {
{ XSLFI_LAST_LOADING_TICK, XSCF_NULL, 2, 2, "last_loading_tick", nullptr, nullptr, nullptr },
{ XSLFI_SCRIPT_LEAGUE_TABLES, XSCF_NULL, 1, 1, "script_league_tables", nullptr, nullptr, "LEAE,LEAT" },
{ XSLFI_VELOCITY_NAUTICAL, XSCF_IGNORABLE_ALL, 1, 1, "velocity_nautical", nullptr, nullptr, nullptr },
{ XSLFI_CONSISTENT_PARTIAL_Z, XSCF_NULL, 1, 1, "consistent_partial_z", nullptr, nullptr, nullptr },
{ XSLFI_NULL, XSCF_NULL, 0, 0, nullptr, nullptr, nullptr, nullptr },// This is the end marker
};

1
src/saveload/extended_ver_sl.h
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@ -146,6 +146,7 @@ enum SlXvFeatureIndex {
XSLFI_LAST_LOADING_TICK, ///< See: SLV_LAST_LOADING_TICK
XSLFI_SCRIPT_LEAGUE_TABLES, ///< See: Scriptable league tables (PR #10001)
XSLFI_VELOCITY_NAUTICAL, ///< See: SLV_VELOCITY_NAUTICAL (PR #10594)
XSLFI_CONSISTENT_PARTIAL_Z, ///< See: SLV_CONSISTENT_PARTIAL_Z (PR #10570)
XSLFI_RIFF_HEADER_60_BIT, ///< Size field in RIFF chunk header is 60 bit
XSLFI_HEIGHT_8_BIT, ///< Map tile height is 8 bit instead of 4 bit, but savegame version may be before this became true in trunk

1
src/saveload/saveload_common.h
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@ -357,6 +357,7 @@ enum SaveLoadVersion : uint16 {
SLV_LINKGRAPH_EDGES, ///< 304 PR#10314 Explicitly store link graph edges destination.
SLV_VELOCITY_NAUTICAL, ///< 305 PR#10594 Separation of land and nautical velocity (knots!)
SLV_CONSISTENT_PARTIAL_Z, ///< 306 PR#10570 Conversion from an inconsistent partial Z calculation for slopes, to one that is (more) consistent.
SL_MAX_VERSION, ///< Highest possible saveload version

16
src/slope_func.h
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@ -21,7 +21,7 @@
* @param corner A #Corner.
* @return true iff corner is in a valid range.
*/
static inline bool IsValidCorner(Corner corner)
static constexpr inline bool IsValidCorner(Corner corner)
{
return IsInsideMM(corner, 0, CORNER_END);
}
@ -33,7 +33,7 @@ static inline bool IsValidCorner(Corner corner)
* @param s The given #Slope.
* @return True if the slope is steep, else false.
*/
static inline bool IsSteepSlope(Slope s)
static constexpr inline bool IsSteepSlope(Slope s)
{
return (s & SLOPE_STEEP) != 0;
}
@ -44,7 +44,7 @@ static inline bool IsSteepSlope(Slope s)
* @param s The given #Slope.
* @return True if the slope is non-continuous, else false.
*/
static inline bool IsHalftileSlope(Slope s)
static constexpr inline bool IsHalftileSlope(Slope s)
{
return (s & SLOPE_HALFTILE) != 0;
}
@ -57,7 +57,7 @@ static inline bool IsHalftileSlope(Slope s)
* @param s A #Slope.
* @return The slope s without its halftile slope.
*/
static inline Slope RemoveHalftileSlope(Slope s)
static constexpr inline Slope RemoveHalftileSlope(Slope s)
{
return s & ~SLOPE_HALFTILE_MASK;
}
@ -145,7 +145,7 @@ static inline Corner GetHighestSlopeCorner(Slope s)
* @param s The #Slope.
* @return The corner of the leveled halftile.
*/
static inline Corner GetHalftileSlopeCorner(Slope s)
static constexpr inline Corner GetHalftileSlopeCorner(Slope s)
{
dbg_assert(IsHalftileSlope(s));
return (Corner)((s >> 6) & 3);
@ -157,7 +157,7 @@ static inline Corner GetHalftileSlopeCorner(Slope s)
* @param s The #Slope.
* @return Relative height of highest corner.
*/
static inline int GetSlopeMaxZ(Slope s)
static constexpr inline int GetSlopeMaxZ(Slope s)
{
if (s == SLOPE_FLAT) return 0;
if (IsSteepSlope(s)) return 2;
@ -170,7 +170,7 @@ static inline int GetSlopeMaxZ(Slope s)
* @param s The #Slope.
* @return Relative height of highest corner.
*/
static inline int GetSlopeMaxPixelZ(Slope s)
static constexpr inline int GetSlopeMaxPixelZ(Slope s)
{
return GetSlopeMaxZ(s) * TILE_HEIGHT;
}
@ -271,7 +271,7 @@ static inline Slope InclinedSlope(DiagDirection dir)
* @param corner The #Corner of the halftile.
* @return The #Slope s with the halftile slope added.
*/
static inline Slope HalftileSlope(Slope s, Corner corner)
static constexpr inline Slope HalftileSlope(Slope s, Corner corner)
{
dbg_assert(IsValidCorner(corner));
return (Slope)(s | SLOPE_HALFTILE | (corner << 6));

2
src/station_cmd.cpp
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@ -3668,7 +3668,7 @@ void StationPickerDrawSprite(int x, int y, StationType st, RailType railtype, Ro
DrawRailTileSeqInGUI(x, y, t, (st == STATION_WAYPOINT || st == STATION_ROADWAYPOINT) ? 0 : total_offset, 0, pal);
}
static int GetSlopePixelZ_Station(TileIndex tile, uint x, uint y)
static int GetSlopePixelZ_Station(TileIndex tile, uint x, uint y, bool ground_vehicle)
{
return GetTileMaxPixelZ(tile);
}

3
src/tests/CMakeLists.txt
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@ -0,0 +1,3 @@
add_files(
landscape_partial_pixel_z.h
)

552
src/tests/landscape_partial_pixel_z.h
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@ -0,0 +1,552 @@
/*
* This file is part of OpenTTD.
* OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
* OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file landscape_partial_pixel_z.h Tests for consistency/validity of the results of GetPartialPixelZ. */
/**
* Check whether the addition of two slope's GetPartialPixelZ values results in
* the GetPartialPixelZ values of the expected slope.
* This iterates over all sub-pixel locations within a single tile.
* @param slope_expected The slope that is expected.
* @param slope_a The first slope of the addition.
* @param slope_b The second slope of the addition.
* @return True iff at all GetPartialPixelZ results are the same for each sub-tile position.
*/
constexpr bool CheckPartialPixelZSlopeAddition(Slope slope_expected, Slope slope_a, Slope slope_b)
{
for (uint x = 0; x < TILE_SIZE; x++) {
for (uint y = 0; y < TILE_SIZE; y++) {
int z_a = InternalGetPartialPixelZ(x, y, slope_a);
int z_b = InternalGetPartialPixelZ(x, y, slope_b);
int z_result = InternalGetPartialPixelZ(x, y, slope_expected);
if (z_result != z_a + z_b) return false;
}
}
return true;
}
/* A one corner slope, plus the opposite three corner slope results in a flat but elevated slope. */
static_assert(CheckPartialPixelZSlopeAddition(SLOPE_ELEVATED, SLOPE_N, SLOPE_WSE));
static_assert(CheckPartialPixelZSlopeAddition(SLOPE_ELEVATED, SLOPE_E, SLOPE_NWS));
static_assert(CheckPartialPixelZSlopeAddition(SLOPE_ELEVATED, SLOPE_S, SLOPE_ENW));
static_assert(CheckPartialPixelZSlopeAddition(SLOPE_ELEVATED, SLOPE_W, SLOPE_SEN));
/* Diagonal slopes with their opposite slope result in a flat but elevated slope. */
static_assert(CheckPartialPixelZSlopeAddition(SLOPE_ELEVATED, SLOPE_NW, SLOPE_SE));
static_assert(CheckPartialPixelZSlopeAddition(SLOPE_ELEVATED, SLOPE_SW, SLOPE_NE));
/* Half tile slopes with their opposite half tile slope result in a flat but elevated slope. */
static_assert(CheckPartialPixelZSlopeAddition(SLOPE_ELEVATED, HalftileSlope(SLOPE_N, CORNER_N), HalftileSlope(SLOPE_S, CORNER_S)));
static_assert(CheckPartialPixelZSlopeAddition(SLOPE_ELEVATED, HalftileSlope(SLOPE_E, CORNER_E), HalftileSlope(SLOPE_W, CORNER_W)));
/* Two opposite one corner slopes result in the two corner slope with opposite corners. */
static_assert(CheckPartialPixelZSlopeAddition(SLOPE_NS, SLOPE_N, SLOPE_S));
static_assert(CheckPartialPixelZSlopeAddition(SLOPE_EW, SLOPE_E, SLOPE_W));
/* A steep slope is a one corner slope on top of a three corner slope. */
static_assert(CheckPartialPixelZSlopeAddition(SLOPE_STEEP_N, SLOPE_N, SLOPE_ENW));
static_assert(CheckPartialPixelZSlopeAddition(SLOPE_STEEP_E, SLOPE_E, SLOPE_SEN));
static_assert(CheckPartialPixelZSlopeAddition(SLOPE_STEEP_S, SLOPE_S, SLOPE_WSE));
static_assert(CheckPartialPixelZSlopeAddition(SLOPE_STEEP_W, SLOPE_W, SLOPE_NWS));
/* A half tile steep slope is a one corner half tile on top of a three corner slope. */
static_assert(CheckPartialPixelZSlopeAddition(HalftileSlope(SLOPE_STEEP_N, CORNER_N), HalftileSlope(SLOPE_N, CORNER_N), SLOPE_ENW));
static_assert(CheckPartialPixelZSlopeAddition(HalftileSlope(SLOPE_STEEP_E, CORNER_E), HalftileSlope(SLOPE_E, CORNER_E), SLOPE_SEN));
static_assert(CheckPartialPixelZSlopeAddition(HalftileSlope(SLOPE_STEEP_S, CORNER_S), HalftileSlope(SLOPE_S, CORNER_S), SLOPE_WSE));
static_assert(CheckPartialPixelZSlopeAddition(HalftileSlope(SLOPE_STEEP_W, CORNER_W), HalftileSlope(SLOPE_W, CORNER_W), SLOPE_NWS));
/**
* Check whether the partial pixel Z values are the expected values. The arrays
* are as if the map is rotated 45 degrees counterclockwise.
* @param slope The slope that is to be checked.
* @param expected The expect partial pixels Z values.
* @return True iff at all GetPartialPixelZ results are the same as the expected Z-coordinates.
*/
constexpr bool CheckPartialPixelZ(Slope slope, std::array<int, TILE_SIZE * TILE_SIZE> expected)
{
for (uint i = 0; i < expected.size(); i++) {
int actual = InternalGetPartialPixelZ(GB(i, 4, 4), GB(i, 0, 4), slope);
if (actual != expected[i]) return false;
}
return true;
}
/* One corner up slopes. */
static_assert(CheckPartialPixelZ(SLOPE_N, {
8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0,
7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0, 0,
7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0, 0, 0,
6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0, 0, 0, 0,
6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0, 0, 0, 0, 0,
5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0, 0, 0, 0, 0, 0,
5, 4, 4, 3, 3, 2, 2, 1, 1, 0, 0, 0, 0, 0, 0, 0,
4, 4, 3, 3, 2, 2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0,
4, 3, 3, 2, 2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0,
3, 3, 2, 2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
3, 2, 2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
2, 2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}));
static_assert(CheckPartialPixelZ(SLOPE_E, {
0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8,
0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7,
0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7,
0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6,
0, 0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6,
0, 0, 0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5,
0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5,
0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4,
0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 2, 3, 3,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 2, 3,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 2,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}));
static_assert(CheckPartialPixelZ(SLOPE_S, {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 2,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 2, 3,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 2, 3, 3,
0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4,
0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4,
0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5,
0, 0, 0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5,
0, 0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6,
0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6,
0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7,
0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7}));
static_assert(CheckPartialPixelZ(SLOPE_W, {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
2, 2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
3, 2, 2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
3, 3, 2, 2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
4, 3, 3, 2, 2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0,
4, 4, 3, 3, 2, 2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0,
5, 4, 4, 3, 3, 2, 2, 1, 1, 0, 0, 0, 0, 0, 0, 0,
5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0, 0, 0, 0, 0, 0,
6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0, 0, 0, 0, 0,
6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0, 0, 0, 0,
7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0, 0, 0,
7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0, 0}));
/* Two corner up, diagonal slopes. */
static_assert(CheckPartialPixelZ(SLOPE_NE, {
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}));
static_assert(CheckPartialPixelZ(SLOPE_SE, {
0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8,
0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8,
0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8,
0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8,
0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8,
0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8,
0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8,
0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8,
0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8,
0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8,
0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8,
0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8,
0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8,
0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8,
0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8,
0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8}));
static_assert(CheckPartialPixelZ(SLOPE_SW, {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8}));
static_assert(CheckPartialPixelZ(SLOPE_NW, {
8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0,
8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0,
8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0,
8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0,
8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0,
8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0,
8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0,
8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0,
8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0,
8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0,
8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0,
8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0,
8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0,
8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0,
8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0,
8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0}));
/* Two opposite corner up slopes. */
static_assert(CheckPartialPixelZ(SLOPE_NS, {
8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0,
7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0, 0,
7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0, 0, 1,
6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0, 0, 1, 1,
6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0, 0, 1, 1, 2,
5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0, 0, 1, 1, 2, 2,
5, 4, 4, 3, 3, 2, 2, 1, 1, 0, 0, 1, 1, 2, 2, 3,
4, 4, 3, 3, 2, 2, 1, 1, 0, 0, 1, 1, 2, 2, 3, 3,
4, 3, 3, 2, 2, 1, 1, 0, 0, 1, 1, 2, 2, 3, 3, 4,
3, 3, 2, 2, 1, 1, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4,
3, 2, 2, 1, 1, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5,
2, 2, 1, 1, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5,
2, 1, 1, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6,
1, 1, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6,
1, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7,
0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7}));
static_assert(CheckPartialPixelZ(SLOPE_EW, {
0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8,
0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7,
1, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7,
1, 1, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6,
2, 1, 1, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6,
2, 2, 1, 1, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5,
3, 2, 2, 1, 1, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5,
3, 3, 2, 2, 1, 1, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4,
4, 3, 3, 2, 2, 1, 1, 0, 0, 1, 1, 2, 2, 3, 3, 4,
4, 4, 3, 3, 2, 2, 1, 1, 0, 0, 1, 1, 2, 2, 3, 3,
5, 4, 4, 3, 3, 2, 2, 1, 1, 0, 0, 1, 1, 2, 2, 3,
5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0, 0, 1, 1, 2, 2,
6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0, 0, 1, 1, 2,
6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0, 0, 1, 1,
7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0, 0, 1,
7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0, 0}));
/* Three corner up slopes. */
static_assert(CheckPartialPixelZ(SLOPE_ENW, {
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5,
8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4,
8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4,
8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3,
8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3,
8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2,
8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2,
8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1,
8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1}));
static_assert(CheckPartialPixelZ(SLOPE_SEN, {
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
6, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
6, 6, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
5, 6, 6, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
5, 5, 6, 6, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
4, 5, 5, 6, 6, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8,
4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8,
3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 8, 8, 8, 8, 8,
3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 8, 8, 8, 8,
2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 8, 8, 8,
2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 8, 8,
1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 8,
1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8}));
static_assert(CheckPartialPixelZ(SLOPE_WSE, {
0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8,
1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8,
1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 8,
2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 8, 8,
2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 8, 8, 8,
3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 8, 8, 8, 8,
3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 8, 8, 8, 8, 8,
4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8,
4, 5, 5, 6, 6, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8,
5, 5, 6, 6, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
5, 6, 6, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
6, 6, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
6, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8}));
static_assert(CheckPartialPixelZ(SLOPE_NWS, {
8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0,
8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1,
8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1,
8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2,
8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2,
8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3,
8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3,
8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4,
8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8}));
/* Normal half tile slopes. */
static_assert(CheckPartialPixelZ(HalftileSlope(SLOPE_N, CORNER_N), {
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 0,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 0, 0,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 0, 0, 0,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 0, 0, 0, 0,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 0, 0, 0, 0, 0,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 0, 0, 0, 0, 0, 0,
8, 8, 8, 8, 8, 8, 8, 8, 8, 0, 0, 0, 0, 0, 0, 0,
8, 8, 8, 8, 8, 8, 8, 8, 0, 0, 0, 0, 0, 0, 0, 0,
8, 8, 8, 8, 8, 8, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0,
8, 8, 8, 8, 8, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
8, 8, 8, 8, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
8, 8, 8, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
8, 8, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
8, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}));
static_assert(CheckPartialPixelZ(HalftileSlope(SLOPE_E, CORNER_E), {
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
0, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
0, 0, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
0, 0, 0, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
0, 0, 0, 0, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
0, 0, 0, 0, 0, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
0, 0, 0, 0, 0, 0, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
0, 0, 0, 0, 0, 0, 0, 8, 8, 8, 8, 8, 8, 8, 8, 8,
0, 0, 0, 0, 0, 0, 0, 0, 8, 8, 8, 8, 8, 8, 8, 8,
0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 8, 8, 8, 8, 8, 8,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 8, 8, 8, 8, 8,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 8, 8, 8, 8,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 8, 8, 8,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 8, 8,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 8,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8}));
static_assert(CheckPartialPixelZ(HalftileSlope(SLOPE_S, CORNER_S), {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 8,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 8, 8,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 8, 8, 8,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 8, 8, 8, 8,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 8, 8, 8, 8, 8,
0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 8, 8, 8, 8, 8, 8,
0, 0, 0, 0, 0, 0, 0, 0, 8, 8, 8, 8, 8, 8, 8, 8,
0, 0, 0, 0, 0, 0, 0, 8, 8, 8, 8, 8, 8, 8, 8, 8,
0, 0, 0, 0, 0, 0, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
0, 0, 0, 0, 0, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
0, 0, 0, 0, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
0, 0, 0, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
0, 0, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
0, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8}));
static_assert(CheckPartialPixelZ(HalftileSlope(SLOPE_W, CORNER_W), {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
8, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
8, 8, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
8, 8, 8, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
8, 8, 8, 8, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
8, 8, 8, 8, 8, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
8, 8, 8, 8, 8, 8, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0,
8, 8, 8, 8, 8, 8, 8, 8, 0, 0, 0, 0, 0, 0, 0, 0,
8, 8, 8, 8, 8, 8, 8, 8, 8, 0, 0, 0, 0, 0, 0, 0,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 0, 0, 0, 0, 0, 0,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 0, 0, 0, 0, 0,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 0, 0, 0, 0,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 0, 0, 0,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 0, 0,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 0}));
/* Steep slopes. */
static_assert(CheckPartialPixelZ(SLOPE_STEEP_N, {
16, 15, 15, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 9, 9, 8,
15, 15, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 9, 9, 8, 8,
15, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 9, 9, 8, 8, 7,
14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7,
14, 13, 13, 12, 12, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 6,
13, 13, 12, 12, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 6, 6,
13, 12, 12, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 6, 6, 5,
12, 12, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 6, 6, 5, 5,
12, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 6, 6, 5, 5, 4,
11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4,
11, 10, 10, 9, 9, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3,
10, 10, 9, 9, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3,
10, 9, 9, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2,
9, 9, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2,
9, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1,
8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1}));
static_assert(CheckPartialPixelZ(SLOPE_STEEP_E, {
8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13, 14, 14, 15, 15, 16,
8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13, 14, 14, 15, 15,
7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13, 14, 14, 15,
7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13, 14, 14,
6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13, 14,
6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13,
5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13,
5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12,
4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12,
4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11,
3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11,
3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10,
2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10,
2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9,
1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9,
1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8}));
static_assert(CheckPartialPixelZ(SLOPE_STEEP_S, {
0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8,
1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8,
1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9,
2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9,
2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10,
3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10,
3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11,
4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11,
4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12,
5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12,
5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13,
6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13,
6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13, 14,
7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13, 14, 14,
7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13, 14, 14, 15,
8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13, 14, 14, 15, 15}));
static_assert(CheckPartialPixelZ(SLOPE_STEEP_W, {
8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0,
8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1,
9, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1,
9, 9, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2,
10, 9, 9, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2,
10, 10, 9, 9, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3,
11, 10, 10, 9, 9, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3,
11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4,
12, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 6, 6, 5, 5, 4,
12, 12, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 6, 6, 5, 5,
13, 12, 12, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 6, 6, 5,
13, 13, 12, 12, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 6, 6,
14, 13, 13, 12, 12, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 6,
14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7,
15, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 9, 9, 8, 8, 7,
15, 15, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 9, 9, 8, 8}));
/* Half tile on top of steep slopes. */
static_assert(CheckPartialPixelZ(HalftileSlope(SLOPE_STEEP_N, CORNER_N), {
16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 8,
16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 8, 7,
16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 8, 7, 7,
16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 8, 7, 7, 6,
16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 8, 7, 7, 6, 6,
16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 8, 7, 7, 6, 6, 5,
16, 16, 16, 16, 16, 16, 16, 16, 16, 8, 7, 7, 6, 6, 5, 5,
16, 16, 16, 16, 16, 16, 16, 16, 8, 7, 7, 6, 6, 5, 5, 4,
16, 16, 16, 16, 16, 16, 16, 8, 7, 7, 6, 6, 5, 5, 4, 4,
16, 16, 16, 16, 16, 16, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3,
16, 16, 16, 16, 16, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3,
16, 16, 16, 16, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2,
16, 16, 16, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2,
16, 16, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1,
16, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1}));
static_assert(CheckPartialPixelZ(HalftileSlope(SLOPE_STEEP_E, CORNER_E), {
16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
8, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
7, 8, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
7, 7, 8, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
6, 7, 7, 8, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
6, 6, 7, 7, 8, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
5, 6, 6, 7, 7, 8, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
5, 5, 6, 6, 7, 7, 8, 16, 16, 16, 16, 16, 16, 16, 16, 16,
4, 5, 5, 6, 6, 7, 7, 8, 16, 16, 16, 16, 16, 16, 16, 16,
4, 4, 5, 5, 6, 6, 7, 7, 8, 16, 16, 16, 16, 16, 16, 16,
3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 16, 16, 16, 16, 16, 16,
3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 16, 16, 16, 16, 16,
2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 16, 16, 16, 16,
2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 16, 16, 16,
1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 16, 16,
1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 16}));
static_assert(CheckPartialPixelZ(HalftileSlope(SLOPE_STEEP_S, CORNER_S), {
0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8,
1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 16,
1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 16, 16,
2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 16, 16, 16,
2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 16, 16, 16, 16,
3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 16, 16, 16, 16, 16,
3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 16, 16, 16, 16, 16, 16,
4, 4, 5, 5, 6, 6, 7, 7, 8, 16, 16, 16, 16, 16, 16, 16,
4, 5, 5, 6, 6, 7, 7, 8, 16, 16, 16, 16, 16, 16, 16, 16,
5, 5, 6, 6, 7, 7, 8, 16, 16, 16, 16, 16, 16, 16, 16, 16,
5, 6, 6, 7, 7, 8, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
6, 6, 7, 7, 8, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
6, 7, 7, 8, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
7, 7, 8, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
7, 8, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
8, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16}));
static_assert(CheckPartialPixelZ(HalftileSlope(SLOPE_STEEP_W, CORNER_W), {
8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 0,
16, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1,
16, 16, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1,
16, 16, 16, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2,
16, 16, 16, 16, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2,
16, 16, 16, 16, 16, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3,
16, 16, 16, 16, 16, 16, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3,
16, 16, 16, 16, 16, 16, 16, 8, 7, 7, 6, 6, 5, 5, 4, 4,
16, 16, 16, 16, 16, 16, 16, 16, 8, 7, 7, 6, 6, 5, 5, 4,
16, 16, 16, 16, 16, 16, 16, 16, 16, 8, 7, 7, 6, 6, 5, 5,
16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 8, 7, 7, 6, 6, 5,
16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 8, 7, 7, 6, 6,
16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 8, 7, 7, 6,
16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 8, 7, 7,
16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 8, 7,
16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 8}));

15
src/tile_cmd.h
Unescape Escape View File

@ -81,7 +81,20 @@ struct DrawTileProcParams {
* @param ti Information about the tile to draw
*/
typedef void DrawTileProc(TileInfo *ti, DrawTileProcParams params);
typedef int GetSlopeZProc(TileIndex tile, uint x, uint y);
/**
* Tile callback function signature for obtaining the world \c Z coordinate of a given
* point of a tile.
*
* @param tile The queries tile for the Z coordinate.
* @param x World X coordinate in tile "units".
* @param y World Y coordinate in tile "units".
* @param ground_vehicle Whether to get the Z coordinate of the ground vehicle, or the ground.
* @return World Z coordinate at tile ground (vehicle) level, including slopes and foundations.
* @see GetSlopePixelZ
*/
typedef int GetSlopeZProc(TileIndex tile, uint x, uint y, bool ground_vehicle);
typedef CommandCost ClearTileProc(TileIndex tile, DoCommandFlag flags);
/**

2
src/town_cmd.cpp
Unescape Escape View File

@ -413,7 +413,7 @@ void DrawHouseImage(HouseID house_id, int left, int top, int right, int bottom)
}
}
static int GetSlopePixelZ_Town(TileIndex tile, uint x, uint y)
static int GetSlopePixelZ_Town(TileIndex tile, uint x, uint y, bool ground_vehicle)
{
return GetTileMaxPixelZ(tile);
}

6
src/train_cmd.cpp
Unescape Escape View File

@ -1462,7 +1462,7 @@ static CommandCost CmdBuildRailWagon(TileIndex tile, DoCommandFlag flags, const
v->x_pos = x;
v->y_pos = y;
v->z_pos = GetSlopePixelZ(x, y);
v->z_pos = GetSlopePixelZ(x, y, true);
v->owner = _current_company;
v->track = TRACK_BIT_DEPOT;
v->vehstatus = VS_HIDDEN | VS_DEFPAL;
@ -1602,7 +1602,7 @@ CommandCost CmdBuildRailVehicle(TileIndex tile, DoCommandFlag flags, const Engin
v->owner = _current_company;
v->x_pos = x;
v->y_pos = y;
v->z_pos = GetSlopePixelZ(x, y);
v->z_pos = GetSlopePixelZ(x, y, true);
v->track = TRACK_BIT_DEPOT;
SetBit(v->flags, VRF_CONSIST_SPEED_REDUCTION);
v->vehstatus = VS_HIDDEN | VS_STOPPED | VS_DEFPAL;
@ -5778,7 +5778,7 @@ bool TrainController(Train *v, Vehicle *nomove, bool reverse)
if (v->IsFrontEngine()) {
/* Check if track in front is free and see if we can leave wormhole. */
int z = GetSlopePixelZ(gp.x, gp.y) - v->z_pos;
int z = GetSlopePixelZ(gp.x, gp.y, true) - v->z_pos;
if (IsTileType(gp.new_tile, MP_TUNNELBRIDGE) && !(abs(z) > 2)) {
if (CheckTrainStayInWormHole(v, gp.new_tile)) {
v->cur_speed = 0;

2
src/tree_cmd.cpp
Unescape Escape View File

@ -788,7 +788,7 @@ static void DrawTile_Trees(TileInfo *ti, DrawTileProcParams params)
}
static int GetSlopePixelZ_Trees(TileIndex tile, uint x, uint y)
static int GetSlopePixelZ_Trees(TileIndex tile, uint x, uint y, bool ground_vehicle)
{
int z;
Slope tileh = GetTilePixelSlope(tile, &z);

53
src/tunnelbridge_cmd.cpp
Unescape Escape View File

@ -2563,7 +2563,7 @@ void DrawBridgeMiddle(const TileInfo *ti)
}
static int GetSlopePixelZ_TunnelBridge(TileIndex tile, uint x, uint y)
static int GetSlopePixelZ_TunnelBridge(TileIndex tile, uint x, uint y, bool ground_vehicle)
{
int z;
Slope tileh = GetTilePixelSlope(tile, &z);
@ -2572,34 +2572,27 @@ static int GetSlopePixelZ_TunnelBridge(TileIndex tile, uint x, uint y)
y &= 0xF;
if (IsTunnel(tile)) {
uint pos = (DiagDirToAxis(GetTunnelBridgeDirection(tile)) == AXIS_X ? y : x);
/* In the tunnel entrance? */
if (5 <= pos && pos <= 10) return z;
if (ground_vehicle) return z;
} else { // IsBridge(tile)
if (IsCustomBridgeHeadTile(tile)) {
return z + TILE_HEIGHT + (IsSteepSlope(tileh) ? TILE_HEIGHT : 0);
}
DiagDirection dir = GetTunnelBridgeDirection(tile);
uint pos = (DiagDirToAxis(dir) == AXIS_X ? y : x);
z += ApplyPixelFoundationToSlope(GetBridgeFoundation(tileh, DiagDirToAxis(dir)), &tileh);
/* On the bridge ramp? */
if (5 <= pos && pos <= 10) {
int delta;
if (ground_vehicle) {
if (tileh != SLOPE_FLAT) return z + TILE_HEIGHT;
switch (dir) {
default: NOT_REACHED();
case DIAGDIR_NE: delta = (TILE_SIZE - 1 - x) / 2; break;
case DIAGDIR_SE: delta = y / 2; break;
case DIAGDIR_SW: delta = x / 2; break;
case DIAGDIR_NW: delta = (TILE_SIZE - 1 - y) / 2; break;
case DIAGDIR_NE: tileh = SLOPE_NE; break;
case DIAGDIR_SE: tileh = SLOPE_SE; break;
case DIAGDIR_SW: tileh = SLOPE_SW; break;
case DIAGDIR_NW: tileh = SLOPE_NW; break;
}
return z + 1 + delta;
}
}
@ -3063,6 +3056,29 @@ static void ChangeTileOwner_TunnelBridge(TileIndex tile, Owner old_owner, Owner
}
}
/**
* Helper to prepare the ground vehicle when entering a bridge. This get called
* when entering the bridge, at the last frame of travel on the bridge head.
* Our calling function gets called before UpdateInclination/UpdateZPosition,
* which normally controls the Z-coordinate. However, in the wormhole of the
* bridge the vehicle is in a strange state so UpdateInclination does not get
* called for the wormhole of the bridge and as such the going up/down bits
* would remain set. As such, this function clears those. In doing so, the call
* to UpdateInclination will not update the Z-coordinate, so that has to be
* done here as well.
* @param gv The ground vehicle entering the bridge.
*/
template <typename T>
static void PrepareToEnterBridge(T *gv)
{
if (HasBit(gv->gv_flags, GVF_GOINGUP_BIT)) {
gv->z_pos++;
ClrBit(gv->gv_flags, GVF_GOINGUP_BIT);
} else {
ClrBit(gv->gv_flags, GVF_GOINGDOWN_BIT);
}
}
/**
* Frame when the 'enter tunnel' sound should be played. This is the second
* frame on a tile, so the sound is played shortly after entering the tunnel
@ -3098,7 +3114,7 @@ static VehicleEnterTileStatus VehicleEnter_TunnelBridge(Vehicle *v, TileIndex ti
y += offset.y;
}
int z = GetSlopePixelZ(x, y) - v->z_pos;
int z = GetSlopePixelZ(x, y, true) - v->z_pos;
if (abs(z) > 2) return VETSB_CANNOT_ENTER;
@ -3188,8 +3204,7 @@ static VehicleEnterTileStatus VehicleEnter_TunnelBridge(Vehicle *v, TileIndex ti
Train *t = Train::From(v);
t->track = TRACK_BIT_WORMHOLE;
SetBit(t->First()->flags, VRF_CONSIST_SPEED_REDUCTION);
ClrBit(t->gv_flags, GVF_GOINGUP_BIT);
ClrBit(t->gv_flags, GVF_GOINGDOWN_BIT);
PrepareToEnterBridge(t);
break;
}
@ -3205,9 +3220,7 @@ static VehicleEnterTileStatus VehicleEnter_TunnelBridge(Vehicle *v, TileIndex ti
}
rv->InvalidateImageCache();
rv->state = RVSB_WORMHOLE;
/* There are no slopes inside bridges / tunnels. */
ClrBit(rv->gv_flags, GVF_GOINGUP_BIT);
ClrBit(rv->gv_flags, GVF_GOINGDOWN_BIT);
PrepareToEnterBridge(rv);
break;
}

2
src/void_cmd.cpp
Unescape Escape View File

@ -25,7 +25,7 @@ static void DrawTile_Void(TileInfo *ti, DrawTileProcParams params)
}
static int GetSlopePixelZ_Void(TileIndex tile, uint x, uint y)
static int GetSlopePixelZ_Void(TileIndex tile, uint x, uint y, bool ground_vehicle)
{
/* This function may be called on tiles outside the map, don't assume
* that 'tile' is a valid tile index. See GetSlopePixelZOutsideMap. */

2
src/water_cmd.cpp
Unescape Escape View File

@ -997,7 +997,7 @@ void DrawShipDepotSprite(int x, int y, Axis axis, DepotPart part)
}
static int GetSlopePixelZ_Water(TileIndex tile, uint x, uint y)
static int GetSlopePixelZ_Water(TileIndex tile, uint x, uint y, bool ground_vehicle)
{
int z;
Slope tileh = GetTilePixelSlope(tile, &z);

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