1 files changed, 81 insertions, 14 deletions
diff --git a/cwd/shaders/block.fs b/cwd/shaders/block.fs
index 4df9b7b..dcc78cc 100644
--- a/cwd/shaders/block.fs
+++ b/cwd/shaders/block.fs
@@ -1,28 +1,95 @@
 #version 330 core
 
-struct TextureCoordData {
-    int blockId;
-    int blockState;
-    int blockSide;
-    vec4 texture;
-};
-
 in vec2 UvPosition;
 
-uniform sampler2D textureAtlas;
+uniform float time;
 uniform int block;
+uniform sampler2D textureAtlas;
+
+// TextureIndex: [most significant bit]<-...<-side[3bit]<-id[13]<-state[4]
+layout(std140) uniform TextureIndexes { // binding point: 0
+  int totalTextures;
+  int indexes[2047];
+};
+// layout(std140) uniform TextureData { vec4 textureData[1024]; }; //binding point: 1
+// layout(std140) uniform TextureData2 { vec4 textureData2[1024]; }; //binddingpoint: 2
+vec4 GetTextureByBlockId(int BlockId);
+vec2 TransformTextureCoord(vec4 TextureAtlasCoords, vec2 UvCoords);
+
+void main() {
+vec4 bad = vec4(1,0,0,1);
+  vec4 color = vec4(0,1,0,1);
+    if (totalTextures!=6)
+        color = bad;
+    if (indexes[0]!=393248)
+        color = bad;
+  for (int i=1;i<2047;i++)
+    if (indexes[i]!=0)
+        color=bad;
+  gl_FragColor = color;
+  /*vec4 BlockTextureCoords = GetTextureByBlockId(block);
+  vec2 AtlasCoords = TransformTextureCoord(BlockTextureCoords, UvPosition);
+  gl_FragColor = texture(textureAtlas, AtlasCoords);*/
+}
 
 vec4 GetTextureByBlockId(int BlockId) {
-    return vec4(0,0,0,0);
+  if (indexes[0] == 0)
+    return vec4(0.05, 0.004, 0.007, 0.004);
+
+  if (totalTextures == 0)
+    return vec4(0, 0, 0.1, 0.1);
+  for (int i = 0; i < totalTextures; i++) {
+    int index = indexes[i + 1];
+    int side = (index & 0xE0000) >> 16;
+    int id = (index & 0xFF0) >> 4;
+    int state = index & 0xF;
+    if (id == BlockId) {
+      return vec4(i, 0, 1, 1);
+    }
+  }
+  /*
+    TNT texture:
+    X 0.0546875
+    Y ~0.00442477876106194690
+    W 0.0078125
+    H ~0.00442477876106194690
+  */
+  return vec4(0.0546875, 0.00442477876106194690, 0.0078125,
+              0.00442477876106194690);
 }
 
-vec4 TransformTextureCoord(vec4 TextureAtlasCoords){
-    return vec4(0,0,0,0);
+vec2 TransformTextureCoord(vec4 TextureAtlasCoords, vec2 UvCoords) {
+  float x = TextureAtlasCoords.x;
+  float y = TextureAtlasCoords.y;
+  float w = TextureAtlasCoords.z;
+  float h = TextureAtlasCoords.w;
+  vec2 A = vec2(x, y);
+  vec2 B = vec2(x + w, y + h);
+
+  const bool isTextureFlippedVertically = true;
+  if (isTextureFlippedVertically) {
+    y = 1 - y;
+    A = vec2(x, y - h);
+    B = vec2(x + w, y);
+  }
+  return A + UvCoords * (B - A);
 }
 
-void main()
+/*
+
+float near = 1.0;
+float far  = 100.0;
+
+float LinearizeDepth(float depth)
 {
-    vec4 TextureCoords = GetTextureByBlockId(block);
-    gl_FragColor = texture(textureAtlas,UvPosition);
+    float z = depth * 2.0 - 1.0; // Back to NDC
+    return (2.0 * near * far) / (far + near - z * (far - near));
 }
 
+void main()
+{
+    float depth = LinearizeDepth(gl_FragCoord.z) / far; // divide by far for demonstration
+    gl_FragColor = vec4(vec3(depth), 1.0f);
+}*/
+
+