Began work on post processing

src/main/resources/assets/zenith/shaders/lod/gl46/quads.frag

@@ -13,7 +13,7 @@ layout(location = 0) out vec4 outColour;
 void main() {
     vec2 uv = mod(uv, vec2(1))*(1f/(vec2(3,2)*256f));
     vec4 colour = texture(blockModelAtlas, uv + baseUV);
-    if (discardAlpha == 1 && colour.a == 0.0f) {
+    if (discardAlpha == 1 && colour.a <= 0.001f) {
         discard;
     }
     outColour = colour * colourTinting;

src/main/resources/assets/zenith/shaders/post/blit_texture_cutout.frag

@@ -0,0 +1,12 @@
+#version 330 core
+
+uniform sampler2D text;
+out vec4 colour;
+in vec2 UV;
+
+void main() {
+    colour = texture(text, UV.xy);
+    if (colour.a == 0.0) {
+        discard;
+    }
+}

src/main/resources/assets/zenith/shaders/post/fullscreen.vert

@@ -0,0 +1,7 @@
+#version 330 core
+
+out vec2 UV;
+void main() {
+    gl_Position = vec4(vec2(gl_VertexID&1, (gl_VertexID>>1)&1) * 4 - 1, 0.99999999999f, 1);
+    UV = gl_Position.xy*0.5+0.5;
+}

src/main/resources/assets/zenith/shaders/post/noop.frag

@@ -0,0 +1,6 @@
+#version 330 core
+out vec4 colour;
+in vec2 UV;
+void main() {
+    colour = vec4(1,0,1,1);
+}

src/main/resources/assets/zenith/shaders/quads.frag

@@ -1,8 +0,0 @@
-#version 460 core
-layout(location = 0) in flat vec4 colour;
-layout(location = 0) out vec4 outColour;
-void main() {
-    //TODO: randomly discard the fragment with respect to the alpha value
-
-    outColour = colour;
-}

src/main/resources/assets/zenith/shaders/quads.vert

@@ -1,18 +0,0 @@
-#version 460 core
-
-layout(location = 0) out flat vec4 colour;
-layout(binding = 0, std140) uniform SceneUniform {
-    mat4 MVP;
-    ivec3 baseSectionPos;
-    int _pad1;
-};
-
-void main() {
-    int cornerIdx = gl_VertexID&3;
-
-
-
-    gl_Position = MVP * vec4(vec3(cornerIdx&1,((cornerIdx>>1)&1),0),1);
-
-    colour = vec4(float((uint(gl_VertexID)>>2)&7)/7,float((uint(gl_VertexID)>>5)&7)/7,float((uint(gl_VertexID)>>8)&7)/7,1);
-}

src/main/resources/assets/zenith/shaders/ray/ray.glsl

@@ -1,28 +0,0 @@
-//Contains the definision of a ray and step functions
-struct Ray {
-    ivec3 pos;
-    vec3 innerPos;
-
-    vec3 dir;
-    vec3 invDir;
-};
-
-Ray ray;
-void setup(vec3 origin, vec3 direction) {
-    ray.pos = ivec3(origin);
-    ray.innerPos = origin - ray.pos;
-    direction *= inversesqrt(direction);
-    ray.dir = direction;
-    ray.invDir = 1/direction;
-}
-
-void step(ivec3 aabb) {
-    //TODO:check for innerPos>=1 and step into that voxel
-    vec3 t2f = (aabb - ray.innerPos) * ray.invDir;
-    float mint2f = min(t2f.x, min(t2f.y, t2f.z));
-    bvec3 msk = lessThanEqual(t2f.xyz, vec3(mint2f));
-    vec3 newIP = mint2f * ray.dir + ray.innerPos;
-    ivec3 offset = min(aabb-1, ivec3(newIP));
-    ray.pos += offset + ivec3(msk);
-    ray.innerPos = mix(vec3(0), newIP - offset, not(msk));
-}

src/main/resources/assets/zenith/shaders/ray/storage.glsl

@@ -1,8 +0,0 @@
-struct Voxel {
-
-};
-
-//TODO: add tlas and blas voxel fetching (rings and all)
-void getVoxel() {
-
-}

src/main/resources/assets/zenith/shaders/ray/tracer.glsl

@@ -1,2 +0,0 @@
-//Glue code between ray stepper and voxel storage
-// its the primary ray tracer