119 lines
2.7 KiB
Plaintext
119 lines
2.7 KiB
Plaintext
struct InstanceInput {
|
|
@location(2) position: vec2<f32>,
|
|
@location(3) velocity: vec2<f32>,
|
|
@location(4) rotation_0: vec2<f32>,
|
|
@location(5) rotation_1: vec2<f32>,
|
|
@location(6) size: f32,
|
|
@location(7) created: f32,
|
|
@location(8) expires: f32,
|
|
@location(9) texture_index_len_rep: vec3<u32>,
|
|
@location(10) texture_aspect_fps: vec2<f32>,
|
|
};
|
|
|
|
struct VertexInput {
|
|
@location(0) position: vec3<f32>,
|
|
@location(1) texture_coords: vec2<f32>,
|
|
}
|
|
|
|
struct VertexOutput {
|
|
@builtin(position) position: vec4<f32>,
|
|
@location(0) texture_coords: vec2<f32>,
|
|
@location(1) texture_index: u32,
|
|
}
|
|
|
|
|
|
@group(1) @binding(0)
|
|
var<uniform> global: GlobalUniform;
|
|
struct GlobalUniform {
|
|
camera_position: vec2<f32>,
|
|
camera_zoom: vec2<f32>,
|
|
camera_zoom_limits: vec2<f32>,
|
|
window_size: vec2<f32>,
|
|
window_aspect: vec2<f32>,
|
|
starfield_texture: vec2<u32>,
|
|
starfield_tile_size: vec2<f32>,
|
|
starfield_size_limits: vec2<f32>,
|
|
current_time: vec2<f32>,
|
|
};
|
|
|
|
|
|
@group(0) @binding(0)
|
|
var texture_array: binding_array<texture_2d<f32>>;
|
|
@group(0) @binding(1)
|
|
var sampler_array: binding_array<sampler>;
|
|
|
|
|
|
fn fmod(x: f32, m: f32) -> f32 {
|
|
return x - floor(x / m) * m;
|
|
}
|
|
|
|
@vertex
|
|
fn vertex_main(
|
|
vertex: VertexInput,
|
|
instance: InstanceInput,
|
|
) -> VertexOutput {
|
|
|
|
var out: VertexOutput;
|
|
out.texture_coords = vertex.texture_coords;
|
|
|
|
if instance.expires < global.current_time.x {
|
|
out.texture_index = instance.texture_index_len_rep.x;
|
|
out.position = vec4<f32>(2.0, 2.0, 0.0, 1.0);
|
|
return out;
|
|
}
|
|
|
|
let age = global.current_time.x - instance.created;
|
|
|
|
var frame: u32 = u32(0);
|
|
if instance.texture_index_len_rep.z == u32(1) {
|
|
// Repeat
|
|
frame = u32(fmod(
|
|
(age / instance.texture_aspect_fps.y),
|
|
f32(instance.texture_index_len_rep.y)
|
|
));
|
|
} else {
|
|
// Once
|
|
frame = u32(min(
|
|
(age / instance.texture_aspect_fps.y),
|
|
f32(instance.texture_index_len_rep.y) - 1.0
|
|
));
|
|
}
|
|
|
|
|
|
out.texture_index = instance.texture_index_len_rep.x + frame;
|
|
let rotation = mat2x2(instance.rotation_0, instance.rotation_1);
|
|
|
|
var scale: f32 = instance.size / global.camera_zoom.x;
|
|
var pos: vec2<f32> = vec2(vertex.position.x, vertex.position.y);
|
|
|
|
pos = pos * vec2<f32>(
|
|
instance.texture_aspect_fps.x * scale / global.window_aspect.x,
|
|
scale
|
|
);
|
|
pos = rotation * pos;
|
|
|
|
var ipos: vec2<f32> = (
|
|
vec2(instance.position.x, instance.position.y)
|
|
+ (instance.velocity * age)
|
|
- global.camera_position
|
|
);
|
|
|
|
pos = pos + vec2<f32>(
|
|
ipos.x / (global.camera_zoom.x/2.0) / global.window_aspect.x,
|
|
ipos.y / (global.camera_zoom.x/2.0)
|
|
);
|
|
|
|
out.position = vec4<f32>(pos, 0.0, 1.0);
|
|
return out;
|
|
}
|
|
|
|
|
|
@fragment
|
|
fn fragment_main(in: VertexOutput) -> @location(0) vec4<f32> {
|
|
return textureSampleLevel(
|
|
texture_array[in.texture_index],
|
|
sampler_array[0],
|
|
in.texture_coords,
|
|
0.0
|
|
).rgba;
|
|
} |