#version 330

in vec3 vertexPosition;
in vec2 vertexTexCoord;
in vec3 vertexNormal;
in vec2 vertexTileTexCoord;  
in vec4 vertexMetadata1;

out vec2 fragTexCoord;
out vec3 fragNormal;
out vec2 fragTileTexCoord;

flat out int ambientOcclusionSide1;
flat out int ambientOcclusionSide2;
flat out int ambientOcclusionCorner1;
flat out int ambientOcclusionCorner2;
flat out int ambientOcclusionCorner3;
flat out int quadHeight;
flat out int quadWidth;

uniform mat4 mvp;

void main() {
	fragTexCoord = vertexTexCoord;
  fragTileTexCoord = vertexTileTexCoord;
  fragNormal = vertexNormal;
  gl_Position = mvp*vec4(vertexPosition, 1.0);

  // metadata 1 parsing
  ambientOcclusionSide1 = floatBitsToInt(vertexMetadata1.x);
  ambientOcclusionSide2 = floatBitsToInt(vertexMetadata1.y);
  int metadata1Z = floatBitsToInt(vertexMetadata1.z);
  int metadata1W = floatBitsToInt(vertexMetadata1.w);
  ambientOcclusionCorner1 = (metadata1Z & 0x1) >> 0; // Take 0th bit.
  ambientOcclusionCorner2 = (metadata1Z & 0x2) >> 1; // Take 1st bit.
  ambientOcclusionCorner3 = (metadata1Z & 0x4) >> 2; // Take 2nd bit.
  quadHeight = (metadata1Z & 0x1f8) >> 3;            // Take 3rd-8th bits.
  quadWidth  = (metadata1Z & 0x7e00) >> 9;           // Take 9th-14th bits.
}