AI帮我忙之webgpu实时路径追踪

最近体验了VIBE CODING

做了个webgpu的仿cycles的demo

pingpong + bvh + software pathtracing + textureArray< atlas > 非常有趣（：

并且经过验证 AI可以直接写wgsl shader

const rayAABBIntersectFn = wgslFn(`
					fn rayAABBIntersect(
						rayOrigin: vec3f,
						rayDir: vec3f,
						rayInvDir: vec3f,
						aabbMin: vec3f,
						aabbMax: vec3f
					) -> bool {
						// Expand AABB to handle triangles that span across split planes
						// Must match epsilon used in BVH construction
						let epsilon = 0.01;
						let expandedMin = aabbMin - vec3f(epsilon);
						let expandedMax = aabbMax + vec3f(epsilon);
						
						let t1 = (expandedMin - rayOrigin) * rayInvDir;
						let t2 = (expandedMax - rayOrigin) * rayInvDir;
						
						let tmin = min(t1, t2);
						let tmax = max(t1, t2);
						
						let tNear = max(max(tmin.x, tmin.y), tmin.z);
						let tFar = min(min(tmax.x, tmax.y), tmax.z);
						
						return tNear <= tFar && tFar > 0.001;
					}
				`);

由于工作是2D，可能下一步要玩的就是vector font了