First Commit

shaders/simplePoint.wgsl

@@ -0,0 +1,58 @@
+struct Particle {
+    pos: vec3<f32>,
+    _pad0: f32,       // matches _pad0 in C
+    vel: vec3<f32>,
+    _pad1: f32,       // matches _pad1 in C
+};
+
+@group(0) @binding(0)
+var<storage, read> particles: array<Particle>;
+
+@group(0) @binding(1)
+var<uniform> viewProjectionMatrix: mat4x4<f32>;
+
+@group(0) @binding(2)
+var<uniform> cameraRight: vec3<f32>;
+
+@group(0) @binding(3)
+var<uniform> cameraUp: vec3<f32>;
+
+struct VertexOutput {
+    @builtin(position) Position: vec4<f32>,
+    @location(0) fragColor: vec4<f32>,
+};
+
+const quadVertexOffsets = array<vec2<f32>, 6>(
+    vec2<f32>(-1, -1),
+    vec2<f32>( 1, -1),
+    vec2<f32>(-1,  1),
+    vec2<f32>( 1, -1),
+    vec2<f32>( 1,  1),
+    vec2<f32>(-1,  1)
+);
+
+@vertex
+fn vs_main(
+    @builtin(vertex_index) vertexIndex: u32,
+    @builtin(instance_index) instanceIndex: u32
+) -> VertexOutput {
+    let particle = particles[instanceIndex];
+
+
+    let offset = quadVertexOffsets[vertexIndex];
+
+let worldPosition = particle.pos * 150.0
+    + offset.x * cameraRight
+    + offset.y * cameraUp;
+
+    var output: VertexOutput;
+    output.Position = viewProjectionMatrix * vec4<f32>(worldPosition , 1.0);
+    output.fragColor = vec4<f32>(1.0, 1.0, 1.0, 1.0); // white color
+
+    return output;
+}
+
+@fragment
+fn fs_main(input: VertexOutput) -> @location(0) vec4<f32> {
+    return input.fragColor;
+}