New example, loading glTF scenes instead of individual OBJ. Showing simple path tracing and how to make it 3x faster.

ray_tracing_gltf/shaders/raytrace.rgen

@@ -0,0 +1,49 @@
+#version 460
+#extension GL_EXT_ray_tracing : require
+#extension GL_GOOGLE_include_directive : enable
+#include "binding.glsl"
+#include "raycommon.glsl"
+
+layout(set = 0, binding = 0) uniform accelerationStructureEXT topLevelAS;
+layout(set = 0, binding = 1, rgba32f) uniform image2D image;
+
+layout(location = 0) rayPayloadEXT hitPayload prd;
+
+layout(set = 1, binding = B_CAMERA) uniform CameraProperties
+{
+  mat4 view;
+  mat4 proj;
+  mat4 viewInverse;
+  mat4 projInverse;
+}
+cam;
+
+void main()
+{
+  const vec2 pixelCenter = vec2(gl_LaunchIDEXT.xy) + vec2(0.5);
+  const vec2 inUV        = pixelCenter / vec2(gl_LaunchSizeEXT.xy);
+  vec2       d           = inUV * 2.0 - 1.0;
+
+  vec4 origin    = cam.viewInverse * vec4(0, 0, 0, 1);
+  vec4 target    = cam.projInverse * vec4(d.x, d.y, 1, 1);
+  vec4 direction = cam.viewInverse * vec4(normalize(target.xyz), 0);
+
+  uint  rayFlags = gl_RayFlagsOpaqueEXT;
+  float tMin     = 0.001;
+  float tMax     = 10000.0;
+
+  traceRayEXT(topLevelAS,     // acceleration structure
+              rayFlags,       // rayFlags
+              0xFF,           // cullMask
+              0,              // sbtRecordOffset
+              0,              // sbtRecordStride
+              0,              // missIndex
+              origin.xyz,     // ray origin
+              tMin,           // ray min range
+              direction.xyz,  // ray direction
+              tMax,           // ray max range
+              0               // payload (location = 0)
+  );
+
+  imageStore(image, ivec2(gl_LaunchIDEXT.xy), vec4(prd.hitValue, 1.0));
+}