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shader for hyperbolic equidistant

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Zeno Rogue
2025-09-09 10:30:19 +02:00
parent 9b82538f04
commit 39a61cf567
1 changed files with 8 additions and 0 deletions
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8
shaders.cpp
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@@ -312,6 +312,14 @@ shared_ptr<glhr::GLprogram> write_shader(flagtype shader_flags) {
if(dim3) coordinator += "t[0] = tx; t[1] = ty*t.y/r; t[2] = ty*t.z/r; t[3] = 1.0;\n";
if(dim3) shader_flags |= SF_ZFOG;
}
else if(pmodel == mdEquidistant && hyperbolic) {
shader_flags |= SF_BAND | SF_ORIENT | SF_BOX | SF_DIRECT | SF_NONSPATIAL;
coordinator += "t = uPP * t;", vsh += "uniform mediump mat4 uPP;";
if(dim2) coordinator += "mediump float zlev = zlevel(t); t /= zlev;\n";
if(dim2) coordinator += "mediump float r = length(t.xy); if(r > 0.) t.xy *= asinh(r) / r / 2.; t[2] = 0.; t[3] = 1.;\n";
if(dim3) coordinator += "mediump float r = length(t.xyz); if(r > 0.) t.xyz *= asinh(r) / r / 2.; t[3] = 1.;\n";
if(dim3) shader_flags |= SF_ZFOG;
}
else if(pmodel == mdHalfplane && hyperbolic) {
shader_flags |= SF_HALFPLANE | SF_ORIENT | SF_BOX | SF_DIRECT | SF_NONSPATIAL;
if(dim2) shader_flags |= SF_USE_ALPHA;