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Merge pull request #60 from tsoding/57

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(#57) Smooth flashlight radius animation
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Alexey Kutepov 2019-11-28 00:35:28 +07:00 committed by GitHub
commit 1b4d209661
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 38 additions and 21 deletions
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59
src/boomer.nim
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@ -6,6 +6,7 @@ import config
import x11/xlib, x11/x, x11/xutil, x11/keysym
import opengl, opengl/glx
import math
import la
type Shader = tuple[path, content: string]
@ -75,8 +76,29 @@ proc newShaderProgram(vertex, fragment: Shader): GLuint =
glUseProgram(result)
proc draw(screenshot: Image, camera: var Camera, shader, vao, texture: GLuint,
windowSize: Vec2f, mouse: Mouse, flShadow: float32, flRadius: float32) =
type Flashlight = object
isEnabled: bool
shadow: float32
radius: float32
deltaRadius: float32
const
INITIAL_FL_DELTA_RADIUS = 100.0
FL_DELTA_RADIUS_DECELERATION = 400.0
proc update(flashlight: var Flashlight, dt: float32) =
flashlight.radius = max(0.0, flashlight.radius + flashlight.deltaRadius * dt)
if abs(flashlight.deltaRadius) > 0.5:
flashlight.deltaRadius -= sgn(flashlight.deltaRadius).float32 * FL_DELTA_RADIUS_DECELERATION * dt
if flashlight.isEnabled:
flashlight.shadow = min(flashlight.shadow + 6.0 * dt, 0.8)
else:
flashlight.shadow = max(flashlight.shadow - 6.0 * dt, 0.0)
proc draw(screenshot: Image, camera: Camera, shader, vao, texture: GLuint,
windowSize: Vec2f, mouse: Mouse, flashlight: Flashlight) =
glClearColor(0.1, 0.1, 0.1, 1.0)
glClear(GL_COLOR_BUFFER_BIT or GL_DEPTH_BUFFER_BIT)
@ -93,8 +115,8 @@ proc draw(screenshot: Image, camera: var Camera, shader, vao, texture: GLuint,
glUniform2f(glGetUniformLocation(shader, "cursorPos".cstring),
mouse.curr.x.float32,
mouse.curr.y.float32)
glUniform1f(glGetUniformLocation(shader, "flShadow".cstring), flShadow)
glUniform1f(glGetUniformLocation(shader, "flRadius".cstring), flRadius)
glUniform1f(glGetUniformLocation(shader, "flShadow".cstring), flashlight.shadow)
glUniform1f(glGetUniformLocation(shader, "flRadius".cstring), flashlight.radius)
glBindVertexArray(vao)
glDrawElements(GL_TRIANGLES, count = 6, GL_UNSIGNED_INT, indices = nil)
@ -255,9 +277,9 @@ proc main() =
quitting = false
camera = Camera(scale: 1.0)
mouse: Mouse
flashlight = false
f = 0.0
flRadius = 200.0
flashlight = Flashlight(
isEnabled: false,
radius: 200.0)
while not quitting:
var wa: TXWindowAttributes
@ -313,7 +335,7 @@ proc main() =
echo "------------------------------"
of XK_f:
flashlight = not flashlight
flashlight.isEnabled = not flashlight.isEnabled
else:
discard
@ -323,16 +345,15 @@ proc main() =
mouse.prev = mouse.curr
mouse.drag = true
of Button4:
if (xev.xkey.state and ControlMask) > 0.uint32 and flashlight:
# TODO(#57): changing flashlight radius should be animated
flRadius += 10.0
of Button4: # Scroll up
if (xev.xkey.state and ControlMask) > 0.uint32 and flashlight.isEnabled:
flashlight.deltaRadius += INITIAL_FL_DELTA_RADIUS
else:
camera.deltaScale += config.scrollSpeed
of Button5:
if (xev.xkey.state and ControlMask) > 0.uint32 and flashlight:
flRadius = max(flRadius - 10.0, 0.0)
of Button5: # Scoll down
if (xev.xkey.state and ControlMask) > 0.uint32 and flashlight.isEnabled:
flashlight.deltaRadius -= INITIAL_FL_DELTA_RADIUS
else:
camera.deltaScale -= config.scrollSpeed
@ -351,15 +372,11 @@ proc main() =
let dt = 1.0 / config.fps.float
camera.update(config, dt, mouse, screenshot,
vec2(wa.width.float32, wa.height.float32))
if flashlight:
f = min(f + 6.0 * dt, 0.8)
else:
f = max(f - 6.0 * dt, 0.0)
flashlight.update(dt)
screenshot.draw(camera, shaderProgram, vao, texture,
vec2(wa.width.float32, wa.height.float32),
mouse, f, flRadius)
mouse, flashlight)
glXSwapBuffers(display, win)