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examples: add ported boids example

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Ported from https://github.com/austinEng/webgpu-samples/
This commit is contained in:
Andrew Gutekanst 2022-04-12 21:15:49 -04:00 • committed by Stephen Gutekanst
parent 9e945ce951
commit a7727c6b54
4 changed files with 336 additions and 12 deletions
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15
examples/boids/sprite.wgsl Normal file
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@stage(vertex)
fn vert_main(@location(0) a_particlePos : vec2<f32>,
@location(1) a_particleVel : vec2<f32>,
@location(2) a_pos : vec2<f32>) -> @builtin(position) vec4<f32> {
let angle = -atan2(a_particleVel.x, a_particleVel.y);
let pos = vec2<f32>(
(a_pos.x * cos(angle)) - (a_pos.y * sin(angle)),
(a_pos.x * sin(angle)) + (a_pos.y * cos(angle)));
return vec4<f32>(pos + a_particlePos, 0.0, 1.0);
}
@stage(fragment)
fn frag_main() -> @location(0) vec4<f32> {
return vec4<f32>(1.0, 1.0, 1.0, 1.0);
}