64 lines
2.8 KiB
GLSL
64 lines
2.8 KiB
GLSL
#version 330 core
|
|
|
|
uniform sampler2D diffuseMap;
|
|
uniform sampler2D occlusionMap;
|
|
uniform vec2 textureTiling;
|
|
|
|
in vec2 fragTexCoord;
|
|
in vec3 fragNormal;
|
|
in vec2 fragTileTexCoord;
|
|
|
|
flat in uvec4 occlusionSides;
|
|
flat in int topLeftObscured;
|
|
flat in int topRightObscured;
|
|
flat in int bottomLeftObscured;
|
|
flat in int bottomRightObscured;
|
|
flat in int quadHeight;
|
|
flat in int quadWidth;
|
|
|
|
out vec4 outColor;
|
|
|
|
int calculate_ao_square()
|
|
{
|
|
ivec2 tileCoord = ivec2(fragTileTexCoord);
|
|
int ao_square = 0;
|
|
|
|
if(tileCoord.x == quadWidth - 1 && ((occlusionSides.x & uint(1 << tileCoord.y)) > uint(0))) ao_square |= 1 << 0;
|
|
|
|
if(tileCoord.x == quadWidth - 1 && tileCoord.y == quadHeight - 1 && bottomRightObscured > 0) ao_square |= 1 << 1;
|
|
if(tileCoord.x == quadWidth - 1 && tileCoord.y != quadHeight - 1 && ((occlusionSides.x & uint(1 << (tileCoord.y+1))) > uint(0))) ao_square |= 1 << 1;
|
|
if(tileCoord.x != quadWidth - 1 && tileCoord.y == quadHeight - 1 && ((occlusionSides.w & uint(1 << (tileCoord.x+1))) > uint(0))) ao_square |= 1 << 1;
|
|
|
|
if(tileCoord.y == quadHeight - 1 && ((occlusionSides.w & uint(1 << tileCoord.x)) > uint(0))) ao_square |= 1 << 2;
|
|
|
|
if(tileCoord.x == 0 && tileCoord.y == quadHeight - 1 && bottomLeftObscured > 0) ao_square |= 1 << 3;
|
|
if(tileCoord.x == 0 && tileCoord.y != quadHeight - 1 && ((occlusionSides.y & uint(1 << (tileCoord.y+1))) > uint(0))) ao_square |= 1 << 3;
|
|
if(tileCoord.x != 0 && tileCoord.y == quadHeight - 1 && ((occlusionSides.w & uint(1 << (tileCoord.x-1))) > uint(0))) ao_square |= 1 << 3;
|
|
|
|
if(tileCoord.x == 0 && ((occlusionSides.y & uint(1 << tileCoord.y)) > uint(0))) ao_square |= 1 << 4;
|
|
|
|
if(tileCoord.x == 0 && tileCoord.y == 0 && topRightObscured > 0) ao_square |= 1 << 5;
|
|
if(tileCoord.x == 0 && tileCoord.y != 0 && ((occlusionSides.y & uint(1 << (tileCoord.y-1))) > uint(0))) ao_square |= 1 << 5;
|
|
if(tileCoord.x != 0 && tileCoord.y == 0 && ((occlusionSides.z & uint(1 << (tileCoord.x-1))) > uint(0))) ao_square |= 1 << 5;
|
|
|
|
if(tileCoord.y == 0 && ((occlusionSides.z & uint(1 << tileCoord.x)) > uint(0))) ao_square |= 1 << 6;
|
|
|
|
if(tileCoord.x == quadWidth - 1 && tileCoord.y == 0 && topLeftObscured > 0) ao_square |= 1 << 7;
|
|
if(tileCoord.x == quadWidth - 1 && tileCoord.y != 0 && ((occlusionSides.x & uint(1 << (tileCoord.y-1))) > uint(0))) ao_square |= 1 << 7;
|
|
if(tileCoord.x != quadWidth - 1 && tileCoord.y == 0 && ((occlusionSides.z & uint(1 << (tileCoord.x+1))) > uint(0))) ao_square |= 1 << 7;
|
|
|
|
return ao_square;
|
|
}
|
|
|
|
void main()
|
|
{
|
|
vec2 texCoord = (floor(fragTexCoord*textureTiling) + fract(fragTileTexCoord)) / textureTiling;
|
|
|
|
int ao_square = calculate_ao_square();
|
|
|
|
outColor = texture(diffuseMap, texCoord);
|
|
outColor *= texture(occlusionMap, (vec2(ao_square, 0)+fract(fragTileTexCoord))/vec2(256, 1));
|
|
|
|
outColor.a = 1;
|
|
}
|
|
|