start of combine shader

shaders/compile.bat

@@ -12,4 +12,5 @@ C:/VulkanSDK/1.3.280.0/Bin/glslc.exe shaders/rt_quad.frag -o shaders/compiled/fr
 C:/VulkanSDK/1.3.280.0/Bin/glslc.exe shaders/rt_compute_rasterize.comp -o shaders/compiled/rt_compute_rasterize.spv
 C:/VulkanSDK/1.3.280.0/Bin/glslc.exe shaders/rt_compute_grow_one.comp -o shaders/compiled/rt_compute_grow_one.spv
 C:/VulkanSDK/1.3.280.0/Bin/glslc.exe shaders/rt_compute_grow_two.comp -o shaders/compiled/rt_compute_grow_two.spv
-C:/VulkanSDK/1.3.280.0/Bin/glslc.exe shaders/rt_compute_grow_three.comp -o shaders/compiled/rt_compute_grow_three.spv
+C:/VulkanSDK/1.3.280.0/Bin/glslc.exe shaders/rt_compute_grow_three.comp -o shaders/compiled/rt_compute_grow_three.spv
+C:/VulkanSDK/1.3.280.0/Bin/glslc.exe shaders/rt_compute_combine.comp -o shaders/compiled/rt_compute_combine.spv

shaders/compile.sh

@@ -13,4 +13,5 @@ glslc shaders/rt_quad.frag -o shaders/compiled/frag_rt_quad.spv
 glslc shaders/rt_compute_rasterize.comp -o shaders/compiled/rt_compute_rasterize.spv
 glslc shaders/rt_compute_grow_one.comp -o shaders/compiled/rt_compute_grow_one.spv
 glslc shaders/rt_compute_grow_two.comp -o shaders/compiled/rt_compute_grow_two.spv
-glslc shaders/rt_compute_grow_three.comp -o shaders/compiled/rt_compute_grow_three.spv
+glslc shaders/rt_compute_grow_three.comp -o shaders/compiled/rt_compute_grow_three.spv
+glslc shaders/rt_compute_combine.comp -o shaders/compiled/rt_compute_combine.spv

shaders/rt_compute_combine.comp

@@ -0,0 +1,51 @@
+#version 450
+
+layout(binding = 0) uniform UniformBufferObject {
+    mat4 model;
+    mat4 geom_rot;
+    mat4 view;
+    mat4 proj;
+    vec3 camera_pos;
+    bool[16] use_geom_shader;
+} ubo;
+
+layout(binding = 3) readonly buffer CompoundBuffer {
+   uint compounds[];
+};
+
+layout(binding = 4) readonly buffer ColorBuffer {
+   uint grid_in[];
+};
+
+layout(binding = 9) readonly buffer TransparentBuffer {
+   bool transparent_grid[];
+};
+
+layout(binding = 8) buffer SizeBuffer3D {
+   uint grid_size_in[];
+};
+
+layout (local_size_x = 16, local_size_y = 1, local_size_z = 1) in;
+
+void main() {
+    uint index = gl_GlobalInvocationID.x;
+    uint output_offset = 0;
+    uint compound_start = 0;
+    // iterate over the compounds and find the work index inside of it
+    while (index > compounds[compound_start] * compounds[compound_start]) {
+        output_offset += compounds[compound_start] * compounds[compound_start] * compounds[compound_start] * 2;
+        index -= compounds[compound_start] * compounds[compound_start];
+        compound_start = compounds[compound_start + 2];
+    }
+    // grid pos in the task
+    uint compound_grid_size = compounds[compound_start];
+    float compound_scale = uintBitsToFloat(compounds[compound_start + 1]);
+    vec3 mid_offset = vec3(compound_scale * 0.5, compound_scale * 0.5, compound_scale * 0.5);
+    uint x = index % compound_grid_size;
+    uint y = ((index) % (compound_grid_size * compound_grid_size) - x) / (compound_grid_size);
+    uint z = (index - x - y * compound_grid_size) / (compound_grid_size * compound_grid_size);
+
+    uint size_x = grid_size_in[output_offset + (x * compound_grid_size * compound_grid_size + y * compound_grid_size + z) * 3];
+    uint size_y = grid_size_in[output_offset + (x * compound_grid_size * compound_grid_size + y * compound_grid_size + z) * 3 + 1];
+    uint size_z = grid_size_in[output_offset + (x * compound_grid_size * compound_grid_size + y * compound_grid_size + z) * 3 + 2];
+}