vulkan triangle

examples/VulkanTriangle/raygen.glsl

@@ -3,10 +3,45 @@
 #extension GL_EXT_shader_image_load_formatted : enable
 
 layout(binding = 0, set = 0) uniform accelerationStructureEXT topLevelAS;
-layout(binding = 1, set = 0) uniform image2D image;
+layout(binding = 1, set = 0, rgba32f) uniform image2D image;
 
 layout(location = 0) rayPayloadEXT vec3 hitValue;
 
-void main() {
-	imageStore(image, ivec2(gl_LaunchIDEXT.xy), vec4(1,1,1, 0.0));
-}
+void main()
+{
+    // Pixel coordinates
+    uvec2 pixel = gl_LaunchIDEXT.xy;
+    uvec2 resolution = gl_LaunchSizeEXT.xy;
+
+    // Normalized coordinates in range [-1, 1]
+    vec2 uv = (vec2(pixel) + 0.5) / vec2(resolution);
+    vec2 ndc = uv * 2.0 - 1.0;
+
+    // Camera parameters
+    vec3 origin = vec3(0.0, 0.0, -300.0);
+
+    float aspect = float(resolution.x) / float(resolution.y);
+    float fov = radians(60.0);
+    float tanHalfFov = tan(fov * 0.5);
+
+    // Simple pinhole camera facing +Z
+    vec3 direction = normalize(vec3(
+        ndc.x * aspect * tanHalfFov,
+        -ndc.y * tanHalfFov,
+        1.0
+    ));
+
+    traceRayEXT(
+        topLevelAS,
+        gl_RayFlagsNoneEXT,
+        0xff,
+        0, 0, 0,
+        origin,
+        0.001,
+        direction,
+        10000.0,
+        0
+    );
+
+    imageStore(image, ivec2(pixel), vec4(hitValue, 1.0));
+}