SangeFault/assets/minecraft/shaders/program/outline.fsh

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#version 150
uniform sampler2D DiffuseSampler;
in vec2 texCoord;
in vec2 oneTexel;
out vec4 fragColor;
void main(){
vec4 center = texture(DiffuseSampler, texCoord);
vec4 up = texture(DiffuseSampler, texCoord + vec2( 0.0, -oneTexel.y));
vec4 down = texture(DiffuseSampler, texCoord + vec2( oneTexel.x, 0.0));
vec4 left = texture(DiffuseSampler, texCoord + vec2(-oneTexel.x, 0.0));
vec4 right = texture(DiffuseSampler, texCoord + vec2( 0.0, oneTexel.y));
vec4 uDiff = center - up;
vec4 dDiff = center - down;
vec4 lDiff = center - left;
vec4 rDiff = center - right;
vec4 sum = uDiff + dDiff + lDiff + rDiff;
vec3 clamped = clamp(center.rgb - sum.rgb, 0.0, 1.0);
fragColor = vec4(clamped, 1.0);
}