Terrarum/src/shaders/actors.frag

#ifdef GL_ES
    precision mediump float;
#endif

in vec4 v_color;
in vec2 v_texCoords;
uniform sampler2D u_texture;

const int bayer[36] = int[](
192,78,21,120,163,14,
234,142,184,248,56,106,
64,7,92,35,149,206,
128,170,220,199,85,28,
241,49,113,0,135,177,
42,156,213,71,227,99
);
const float bayerSize = 6.0;
const float bayerDivider = 256;

const vec2 boolean = vec2(0.0, 1.0);
out vec4 fragColor;

void main() {
    vec4 inColor = v_color * (texture(u_texture, v_texCoords));
    vec2 entry = mod(gl_FragCoord.xy, vec2(bayerSize, bayerSize));

    float bayerThreshold = float(bayer[int(entry.y) * int(bayerSize) + int(entry.x)]) / bayerDivider;
    float alpha = inColor.a;

    vec4 selvec = vec4(0.0, 0.0, 0.0, (alpha > bayerThreshold) ? 1.0 : 0.0);

    fragColor = inColor * boolean.yyyx + selvec;
    fragColor = inColor;
}