Galactica/crates/render/shaders/sprite.wgsl

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struct InstanceInput {
@location(2) transform_matrix_0: vec4<f32>,
@location(3) transform_matrix_1: vec4<f32>,
@location(4) transform_matrix_2: vec4<f32>,
@location(5) transform_matrix_3: vec4<f32>,
@location(6) texture_idx: u32,
};
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) 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>,
};
@group(0) @binding(0)
var texture_array: binding_array<texture_2d<f32>>;
@group(0) @binding(1)
var sampler_array: binding_array<sampler>;
@vertex
fn vertex_main(
vertex: VertexInput,
instance: InstanceInput,
) -> VertexOutput {
let transform = mat4x4<f32>(
instance.transform_matrix_0,
instance.transform_matrix_1,
instance.transform_matrix_2,
instance.transform_matrix_3,
);
var out: VertexOutput;
out.position = transform * vec4<f32>(vertex.position, 1.0);
out.texture_coords = vertex.texture_coords;
out.index = instance.texture_idx;
return out;
}
@fragment
fn fragment_main(in: VertexOutput) -> @location(0) vec4<f32> {
return textureSampleLevel(
texture_array[in.index],
sampler_array[0],
in.texture_coords,
0.0
).rgba;
}