webgpu triangle

examples/VulkanTriangle/closesthit.wgsl

@@ -0,0 +1,12 @@
+// WebGPU port of closesthit.glsl. Library concatenates this BEFORE the
+// library helpers, so `Payload` declared here is visible to traceRay,
+// runClosestHit, the mega-switch, and the user's raygen source.
+
+struct Payload {
+    color: vec3<f32>,
+};
+
+fn closesthit_main(ray: RayDesc, hit: HitInfo, payload: ptr<function, Payload>) {
+    let bary = vec3<f32>(1.0 - hit.attribs.x - hit.attribs.y, hit.attribs.x, hit.attribs.y);
+    (*payload).color = bary;
+}