Lights

HydraEngine/source/ShaderFiles/shadow_cascade_shader.geom

@@ -0,0 +1,61 @@
+#version 450
+
+layout(triangles, invocations = 6) in;
+layout(triangle_strip, max_vertices = 3) out;
+
+struct ShadowMapSet
+{
+    uint entity_id;
+    uint cascade_count;
+    uint shadow_texture_id;   
+    uint frame_buffer_id;
+    float near_plane[8];
+    float far_plane[8];
+    mat4 light_space_proj[6];
+    mat4 light_space_view[6];
+};
+   
+//Push constants updated for each light
+layout(binding = 0) uniform shadow_per_frame
+{
+	vec3 camera_pos;
+	uint shadow_idxs;
+};
+
+layout(std430, binding = 5) readonly buffer shadow_map_sets
+{
+	ShadowMapSet shadows[10];
+};
+
+
+layout (location=0) in VS_OUT
+{
+	vec2 vsUV;
+    flat uint vsMaterialID;
+}vs_in[];
+
+layout (location=0) out GEOM_OUT
+{
+	vec2 vsUV;
+    flat uint vsMaterialID; 
+}geom_out;
+
+void main()
+{      
+	mat4 view = shadows[shadow_idxs].light_space_view[gl_InvocationID];
+	mat4 proj = shadows[shadow_idxs].light_space_proj[gl_InvocationID];
+
+	for (int i = 0; i < 3; ++i)
+	{
+		gl_Layer = gl_InvocationID;
+        vec4 clip_space_pos = proj * view * gl_in[i].gl_Position;
+        
+        gl_Position = clip_space_pos;
+
+        geom_out.vsMaterialID = vs_in[gl_InvocationID].vsMaterialID;
+        geom_out.vsUV = vs_in[gl_InvocationID].vsUV;
+
+        EmitVertex();
+	}
+	EndPrimitive();
+}