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#version 420 core
uniform vec4 _u_colour;
layout(std140, binding = 0) uniform _u_globals {
mat4 proj;
mat4 view;
vec4 frustum[6];
float znear;
float zfar;
float xfov;
float yfov;
int time;
float xwindow;
float ywindow;
};
layout(binding = 2) uniform sampler2D main_colour;
layout(binding = 3) uniform sampler2D main_depth;
out vec4 _o_colour;
vec4 texture_sample(const sampler2D sampler, const vec2 coord) {
return texture(sampler, coord);
}
float depth_sample(const sampler2D sampler, const vec2 coord) {
return texture(sampler, coord).r;
}
void main() {
const vec2 coords = vec2(gl_FragCoord.x / xwindow, gl_FragCoord.y / ywindow);
const float cur_depth = depth_sample(main_depth, coords);
gl_FragDepth = gl_FragCoord.z * 0.9999f;
if (gl_FragDepth > cur_depth) {
discard;
}
_o_colour = vec4(0.0f, 0.0f, 0.0f, 1.0f);
// This is for dynamically choosing a higher contrast colour, but it's not
// that nice of an effect so it's commented out.
/*
const vec2 coords = vec2(gl_FragCoord.x / xwindow, gl_FragCoord.y / ywindow);
const float cur_depth = depth_sample(main_depth, coords);
gl_FragDepth = gl_FragCoord.z * 0.9999f;
if (gl_FragDepth > cur_depth) {
discard;
}
const vec4 cur_tex = texture_sample(main_colour, coords);
const float clr = (1.0f - (cur_tex.r + cur_tex.g + cur_tex.b) / 3.0f) > 0.5f ? 1.0f : 0.0f;
_o_colour = vec4(clr, clr, clr, 1.0f);
*/
}
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