Size 62 meshlets + major fix for hiz culling

src/main/resources/assets/voxy/shaders/lod/gl46mesh/bindings.glsl

@@ -46,7 +46,7 @@ struct DispatchIndirect {
 };
 
 #ifdef BIND_SAMPLER_AS_HIZ
-layout(binding = 0) uniform sampler2D hizSampler;
+layout(binding = 0) uniform sampler2DShadow hizSampler;
 #else
 layout(binding = 0) uniform sampler2D blockModelAtlas;
 #endif

src/main/resources/assets/voxy/shaders/lod/gl46mesh/meshlet.glsl

@@ -1,5 +1,3 @@
-#define QUADS_PER_MESHLET 30
-
 #define extractMeshletStart extractQuadStart
 #define PosHeader Quad
 #define AABBHeader Quad

src/main/resources/assets/voxy/shaders/lod/gl46mesh/meshletculler.comp

@@ -32,19 +32,22 @@ bool testHiZ(PosHeader secPos, AABBHeader aabb) {
         maxBB = max(maxBB, point);
     }
 
-    minBB = minBB*0.5+0.5;
-    maxBB = maxBB*0.5+0.5;
+    minBB = clamp(minBB*0.5+0.5, vec3(0), vec3(1));
+    maxBB = clamp(maxBB*0.5+0.5, vec3(0), vec3(1));
 
     vec2 size = (maxBB.xy - minBB.xy) * vec2(ivec2(screensize));
     float miplevel = ceil(log2(max(max(size.x, size.y),1)));
-
+    /*
     float a = textureLod(hizSampler,minBB.xy,miplevel).r;
     float b = textureLod(hizSampler,vec2(minBB.x,maxBB.y),miplevel).r;
     float c = textureLod(hizSampler,maxBB.xy,miplevel).r;
     float d = textureLod(hizSampler,vec2(maxBB.x,minBB.y),miplevel).r;
     float depth = max(max(a,b),max(c,d));
-
     return minBB.z <= depth;
+    */
+
+    vec2 midpoint = (maxBB.xy + minBB.xy)*0.5;
+    return textureLod(hizSampler, vec3(midpoint, minBB.z - 0.000000001), miplevel) > 0.0001;
 }