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got basic game working

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pull/42/head
Ben Hansen 4 years ago
parent 0f85fe99a0
commit 87f065acdd
10 changed files with 787 additions and 51 deletions
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235
Cargo.lock generated
Unescape Escape View File

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19
code/showcase/pong/Cargo.toml
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@ -0,0 +1,19 @@
[package]
name = "pong"
version = "0.1.0"
authors = ["Ben Hansen <bhbenjaminhansen@gmail.com>"]
edition = "2018"
[dependencies]
winit = "0.22"
glsl-to-spirv = "0.1.7"
failure = "0.1"
bytemuck = "1.2"
futures = "0.3.5"
wgpu = "0.5.0"
wgpu_glyph = "0.8.0"
rand = "0.7.3"
[dependencies.cgmath]
version = "0.17"
features = ["swizzle"]

85
code/showcase/pong/src/main.rs
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@ -0,0 +1,85 @@
mod render;
mod state;
mod util;
mod system;
use system::System;
use winit::event::*;
use winit::event_loop::{EventLoop, ControlFlow};
use futures::executor::block_on;
fn main() {
let event_loop = EventLoop::new();
let mut render: render::Render = block_on(render::Render::new(&event_loop));
let mut state = state::State {
ball: state::Ball {
position: (0.0, 0.0).into(),
velocity: util::random_vec2_scaled(0.025),
radius: 0.05,
visible: true,
},
player1: state::Player {
position: (-0.8, 0.0).into(),
size: (0.05, 0.4).into(),
score: 0,
visible: true,
},
player2: state::Player {
position: (0.8, 0.0).into(),
size: (0.05, 0.4).into(),
score: 0,
visible: true,
},
game_state: state::GameState::MainMenu,
};
let mut movement_system = system::MovementSystem::new();
event_loop.run(move |event, _, control_flow| {
*control_flow = if state.game_state == state::GameState::Quiting {
ControlFlow::Exit
} else {
ControlFlow::Poll
};
match event {
Event::WindowEvent {
event: WindowEvent::KeyboardInput {
input: KeyboardInput {
state: element_state,
virtual_keycode: Some(keycode),
..
},
..
},
..
} => {
let pressed = element_state == ElementState::Pressed;
if !movement_system.process_input(keycode, pressed) {
process_input(element_state, keycode, control_flow);
}
}
Event::RedrawRequested(_) => {
movement_system.update_state(&mut state);
render.render_state(&state);
}
_ => {}
}
});
}
fn process_input(
element_state: ElementState,
keycode: VirtualKeyCode,
control_flow: &mut ControlFlow,
) {
match (keycode, element_state) {
(VirtualKeyCode::Escape, ElementState::Pressed) => {
*control_flow = ControlFlow::Exit;
}
_ => {}
}
}

304
code/showcase/pong/src/render/mod.rs
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@ -0,0 +1,304 @@
use winit::window::{Window, WindowBuilder};
use winit::event_loop::EventLoop;
use winit::dpi::LogicalSize;
use crate::state;
pub struct Render {
window: Window,
surface: wgpu::Surface,
adapter: wgpu::Adapter,
device: wgpu::Device,
queue: wgpu::Queue,
swap_chain: wgpu::SwapChain,
pipeline: wgpu::RenderPipeline,
vertex_buffer: wgpu::Buffer,
index_buffer: wgpu::Buffer,
}
impl Render {
pub async fn new<T: 'static>(event_loop: &EventLoop<T>) -> Self {
let window = WindowBuilder::new()
.with_title("Pong")
.with_inner_size(LogicalSize::<f64>::from((800, 600)))
.build(&event_loop).unwrap();
let surface = wgpu::Surface::create(&window);
let adapter = wgpu::Adapter::request(
&wgpu::RequestAdapterOptions {
power_preference: wgpu::PowerPreference::Default,
compatible_surface: Some(&surface),
},
wgpu::BackendBit::PRIMARY,
).await.unwrap();
let (device, queue) = adapter.request_device(&wgpu::DeviceDescriptor {
extensions: Default::default(),
limits: Default::default(),
}).await;
let size = window.inner_size();
let sc_desc = wgpu::SwapChainDescriptor {
usage: wgpu::TextureUsage::OUTPUT_ATTACHMENT,
format: wgpu::TextureFormat::Bgra8UnormSrgb,
width: size.width,
height: size.height,
present_mode: wgpu::PresentMode::Fifo,
};
let swap_chain = device.create_swap_chain(&surface, &sc_desc);
let pipeline_layout = device.create_pipeline_layout(&wgpu::PipelineLayoutDescriptor {
bind_group_layouts: &[]
});
let pipeline = create_render_pipeline(
&device,
&pipeline_layout,
sc_desc.format,
&[Vertex::DESC],
include_str!("textured.vert"),
include_str!("textured.frag"),
);
let vertex_buffer = device.create_buffer(&wgpu::BufferDescriptor {
label: None,
size: Vertex::SIZE * 4 * 3,
usage: wgpu::BufferUsage::VERTEX | wgpu::BufferUsage::COPY_DST,
});
let index_buffer = device.create_buffer(&wgpu::BufferDescriptor {
label: None,
size: U32_SIZE * 6 * 3,
usage: wgpu::BufferUsage::INDEX | wgpu::BufferUsage::COPY_DST,
});
Self {
window,
surface,
adapter,
device,
queue,
swap_chain,
pipeline,
vertex_buffer,
index_buffer,
}
}
pub fn render_state(&mut self, state: &state::State) {
let mut encoder = self.device.create_command_encoder(&wgpu::CommandEncoderDescriptor {
label: None,
});
let (stg_vertex, stg_index, num_indices) = QuadBufferBuilder::new()
.push_ball(&state.ball)
.push_player(&state.player1)
.push_player(&state.player2)
.build(&self.device);
stg_vertex.copy_to_buffer(&mut encoder, &self.vertex_buffer);
stg_index.copy_to_buffer(&mut encoder, &self.index_buffer);
let frame = self.swap_chain.get_next_texture().unwrap();
let mut render_pass = encoder.begin_render_pass(&wgpu::RenderPassDescriptor {
color_attachments: &[
wgpu::RenderPassColorAttachmentDescriptor {
attachment: &frame.view,
resolve_target: None,
load_op: wgpu::LoadOp::Clear,
store_op: wgpu::StoreOp::Store,
clear_color: wgpu::Color::BLACK,
},
],
depth_stencil_attachment: None,
});
render_pass.set_vertex_buffer(0, &self.vertex_buffer, 0, 0);
render_pass.set_index_buffer(&self.index_buffer, 0, 0);
render_pass.set_pipeline(&self.pipeline);
render_pass.draw_indexed(0..num_indices, 0, 0..1);
drop(render_pass);
self.queue.submit(&[encoder.finish()]);
self.window.request_redraw();
}
}
const U32_SIZE: wgpu::BufferAddress = std::mem::size_of::<u32>() as wgpu::BufferAddress;
pub struct QuadBufferBuilder {
vertex_data: Vec<Vertex>,
index_data: Vec<u32>,
current_quad: u32,
}
impl QuadBufferBuilder {
pub fn new() -> Self {
Self {
vertex_data: Vec::new(),
index_data: Vec::new(),
current_quad: 0,
}
}
pub fn push_ball(mut self, ball: &state::Ball) -> Self {
if ball.visible {
let min_x = ball.position.x - ball.radius;
let min_y = ball.position.y - ball.radius;
let max_x = ball.position.x + ball.radius;
let max_y = ball.position.y + ball.radius;
self.push_quad(min_x, min_y, max_x, max_y)
} else {
self
}
}
pub fn push_player(mut self, player: &state::Player) -> Self {
if player.visible {
self.push_quad(
player.position.x - player.size.x * 0.5,
player.position.y - player.size.y * 0.5,
player.position.x + player.size.x * 0.5,
player.position.y + player.size.y * 0.5,
)
} else {
self
}
}
pub fn push_quad(mut self, min_x: f32, min_y: f32, max_x: f32, max_y: f32) -> Self {
self.vertex_data.extend(&[
Vertex {
position: (min_x, min_y).into(),
tex_coord: (0.0, 0.0).into(),
},
Vertex {
position: (max_x, min_y).into(),
tex_coord: (1.0, 0.0).into(),
},
Vertex {
position: (max_x, max_y).into(),
tex_coord: (1.0, 1.0).into(),
},
Vertex {
position: (min_x, max_y).into(),
tex_coord: (0.0, 1.0).into(),
},
]);
self.index_data.extend(&[
self.current_quad * 4 + 0,
self.current_quad * 4 + 1,
self.current_quad * 4 + 2,
self.current_quad * 4 + 0,
self.current_quad * 4 + 2,
self.current_quad * 4 + 3,
]);
self.current_quad += 1;
self
}
pub fn build(self, device: &wgpu::Device) -> (StagingBuffer, StagingBuffer, u32) {
(
StagingBuffer::new(device, &self.vertex_data),
StagingBuffer::new(device, &self.index_data),
self.index_data.len() as u32,
)
}
}
pub struct StagingBuffer {
buffer: wgpu::Buffer,
size: wgpu::BufferAddress,
}
impl StagingBuffer {
pub fn new<T: bytemuck::Pod + Sized>(device: &wgpu::Device, data: &[T]) -> StagingBuffer {
StagingBuffer {
buffer: device.create_buffer_with_data(
bytemuck::cast_slice(data),
wgpu::BufferUsage::COPY_SRC,
),
size: (std::mem::size_of::<T>() * data.len()) as wgpu::BufferAddress
}
}
pub fn copy_to_buffer(&self, encoder: &mut wgpu::CommandEncoder, other: &wgpu::Buffer) {
encoder.copy_buffer_to_buffer(&self.buffer, 0, other, 0, self.size)
}
}
#[derive(Copy, Clone)]
struct Vertex {
position: cgmath::Vector2<f32>,
tex_coord: cgmath::Vector2<f32>,
}
unsafe impl bytemuck::Pod for Vertex {}
unsafe impl bytemuck::Zeroable for Vertex {}
impl Vertex {
const SIZE: wgpu::BufferAddress = std::mem::size_of::<Self>() as wgpu::BufferAddress;
const DESC: wgpu::VertexBufferDescriptor<'static> = wgpu::VertexBufferDescriptor {
stride: Self::SIZE,
step_mode: wgpu::InputStepMode::Vertex,
attributes: &wgpu::vertex_attr_array![
0 => Float2,
1 => Float2
],
};
}
fn create_render_pipeline(
device: &wgpu::Device,
layout: &wgpu::PipelineLayout,
color_format: wgpu::TextureFormat,
vertex_descs: &[wgpu::VertexBufferDescriptor],
vs_src: &str,
fs_src: &str,
) -> wgpu::RenderPipeline {
let vs_spirv = glsl_to_spirv::compile(vs_src, glsl_to_spirv::ShaderType::Vertex).unwrap();
let fs_spirv = glsl_to_spirv::compile(fs_src, glsl_to_spirv::ShaderType::Fragment).unwrap();
let vs_data = wgpu::read_spirv(vs_spirv).unwrap();
let fs_data = wgpu::read_spirv(fs_spirv).unwrap();
let vs_module = device.create_shader_module(&vs_data);
let fs_module = device.create_shader_module(&fs_data);
device.create_render_pipeline(&wgpu::RenderPipelineDescriptor {
layout: &layout,
vertex_stage: wgpu::ProgrammableStageDescriptor {
module: &vs_module,
entry_point: "main",
},
fragment_stage: Some(wgpu::ProgrammableStageDescriptor {
module: &fs_module,
entry_point: "main",
}),
rasterization_state: Some(wgpu::RasterizationStateDescriptor {
front_face: wgpu::FrontFace::Ccw,
cull_mode: wgpu::CullMode::Back,
depth_bias: 0,
depth_bias_slope_scale: 0.0,
depth_bias_clamp: 0.0,
}),
primitive_topology: wgpu::PrimitiveTopology::TriangleList,
color_states: &[wgpu::ColorStateDescriptor {
format: color_format,
color_blend: wgpu::BlendDescriptor::REPLACE,
alpha_blend: wgpu::BlendDescriptor::REPLACE,
write_mask: wgpu::ColorWrite::ALL,
}],
depth_stencil_state: None,
sample_count: 1,
sample_mask: !0,
alpha_to_coverage_enabled: false,
vertex_state: wgpu::VertexStateDescriptor {
index_format: wgpu::IndexFormat::Uint32,
vertex_buffers: vertex_descs,
},
})
}

9
code/showcase/pong/src/render/textured.frag
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#version 450
layout(location=0) in vec2 vTexCoord;
layout(location=0) out vec4 fColor;
void main() {
fColor = vec4(vTexCoord, 0, 1);
}

11
code/showcase/pong/src/render/textured.vert
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@ -0,0 +1,11 @@
#version 450
layout(location=0) in vec2 aPosition;
layout(location=1) in vec2 aTexCoord;
layout(location=0) out vec2 vTexCoord;
void main() {
gl_Position = vec4(aPosition, 0, 1);
vTexCoord = aTexCoord;
}

53
code/showcase/pong/src/state.rs
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use cgmath::prelude::*;
#[derive(Eq, PartialEq)]
pub enum GameState {
MainMenu,
Serving,
Playing,
GameOver,
Quiting,
}
pub struct State {
pub ball: Ball,
pub player1: Player,
pub player2: Player,
// pub title_text: Text,
// pub play_button: Text,
// pub quit_button: Text,
pub game_state: GameState,
}
pub struct Ball {
pub position: cgmath::Vector2<f32>,
pub velocity: cgmath::Vector2<f32>,
pub radius: f32,
pub visible: bool,
}
pub struct Player {
pub position: cgmath::Vector2<f32>,
pub size: cgmath::Vector2<f32>,
pub score: u32,
pub visible: bool,
}
// I don't like giving state methods, but whatever
impl Player {
pub fn contains(&self, ball: &Ball) -> bool {
let radii = self.size * 0.5;
let min = self.position - radii;
let max = self.position + radii;
ball.position.x > min.x && ball.position.y > min.y
&& ball.position.x < max.x && ball.position.y < max.y
}
}
pub struct Text {
pub position: cgmath::Vector2<f32>,
pub color: wgpu::Color,
pub text: String,
pub visible: bool,
pub focused: bool,
}

107
code/showcase/pong/src/system.rs
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use winit::event::*;
use crate::state;
use crate::util;
pub trait System {
fn process_input(&mut self, keycode: VirtualKeyCode, pressed: bool) -> bool;
fn update_state(&self, state: &mut state::State);
}
pub struct MovementSystem {
player1_up_pressed: bool,
player1_down_pressed: bool,
player2_up_pressed: bool,
player2_down_pressed: bool,
}
impl MovementSystem {
pub fn new() -> Self {
Self {
player1_up_pressed: false,
player1_down_pressed: false,
player2_up_pressed: false,
player2_down_pressed: false,
}
}
}
impl System for MovementSystem {
fn process_input(&mut self, keycode: VirtualKeyCode, pressed: bool) -> bool {
match keycode {
VirtualKeyCode::W => {
self.player1_up_pressed = pressed;
true
}
VirtualKeyCode::S => {
self.player1_down_pressed = pressed;
true
}
VirtualKeyCode::Up => {
self.player2_up_pressed = pressed;
true
}
VirtualKeyCode::Down => {
self.player2_down_pressed = pressed;
true
}
_ => false,
}
}
fn update_state(&self, state: &mut state::State) {
if self.player1_up_pressed {
state.player1.position.y += 0.025;
}
if self.player1_down_pressed {
state.player1.position.y -= 0.025;
}
if self.player2_up_pressed {
state.player2.position.y += 0.025;
}
if self.player2_down_pressed {
state.player2.position.y -= 0.025;
}
// normalize players
if state.player1.position.y > 1.0 {
state.player1.position.y = 1.0;
}
if state.player1.position.y < -1.0 {
state.player1.position.y = -1.0;
}
if state.player2.position.y > 1.0 {
state.player2.position.y = 1.0;
}
if state.player2.position.y < -1.0 {
state.player2.position.y = -1.0;
}
state.ball.position += state.ball.velocity;
if state.ball.position.y > 1.0 {
state.ball.position.y = 1.0;
state.ball.velocity.y *= -1.0;
}
if state.ball.position.y < -1.0 {
state.ball.position.y = -1.0;
state.ball.velocity.y *= -1.0;
}
if state.ball.position.x > 1.0 {
state.ball.position.set(0.0, 0.0);
state.ball.velocity.x *= -1.0;
}
if state.ball.position.x < -1.0 {
state.ball.position.x = 0.0;
state.ball.velocity.x *= -1.0;
}
// bounce the ball off the players
if state.player1.contains(&state.ball) {
state.ball.position.x -= state.ball.velocity.x + state.player1.size.x;
state.ball.velocity.x *= -1.0;
} else if state.player2.contains(&state.ball) {
state.ball.position.x -= state.ball.velocity.x + state.player2.size.x;
state.ball.velocity.x *= -1.0;
}
}
}

13
code/showcase/pong/src/util.rs
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use cgmath::prelude::*;
pub fn random_vec2() -> cgmath::Vector2<f32> {
let theta: f32 = rand::random();
cgmath::Vector2::new(
theta.cos(),
theta.sin(),
)
}
pub fn random_vec2_scaled(scale: f32) -> cgmath::Vector2<f32> {
random_vec2() * scale
}

2
docs/.vuepress/dist

@ -1 +1 @@
Subproject commit 6d424eea0a6cc5317d986de103519f10beb93415
Subproject commit d6c997e359f56558ee638e2765001f3c5b73ffa7
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