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Code Issues Releases Wiki Activity

disk model in Euclidean and hyperbolic

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Zeno Rogue
2020-12-28 22:00:56 +01:00
parent 266e4e43c4
commit 38eb8c5122
3 changed files with 64 additions and 1 deletions
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38
shaders.cpp
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@@ -155,6 +155,35 @@ shared_ptr<glhr::GLprogram> write_shader(flagtype shader_flags) {
}
else if(!vid.consider_shader_projection) {
shader_flags |= SF_PIXELS;
}
else if(among(pmodel, mdDisk, mdBall) && GDIM == 2 && vrhr::state == 2 && !sphere) {
shader_flags |= SF_DIRECT | SF_BOX;
vsh += "uniform mediump float uAlpha, uDepth, uDepthScaling, uCamera;";
if(hyperbolic) coordinator +=
"float zlev = sqrt(t.z*t.z-t.x*t.x-t.y*t.y);\n"
"float zl = uDepth - uDepthScaling * (uDepth - atanh(tanh(uDepth)/zlev));\n"
"float dd = sqrt(t.x*t.x+t.y*t.y);\n"
"float d = acosh(t.z/zlev);\n"
"float uz = uAlpha + cosh(zl) * cosh(d) * cosh(uCamera) + sinh(zl) * sinh(uCamera);\n"
"float ux = cosh(zl) * sinh(d) / uz;\n"
"t.xy = ux * t.xy / dd;\n"
"t.z = (sinh(zl) * cosh(uCamera) + sinh(uCamera) * cosh(zl) * cosh(d)) / uz;\n"
;
else if(euclid) coordinator +=
"t.z = uDepth * (1. - (t.z - 1.) * uDepthScaling) + uAlpha + uCamera;\n";
else if(sphere) coordinator +=
"float zlev = sqrt(t.z*t.z+t.x*t.x+t.y*t.y);\n"
"float zl = uDepth - uDepthScaling * (uDepth - atan(tan(uDepth)/zlev));\n"
"float dd = sqrt(t.x*t.x+t.y*t.y);\n"
"float d = acos(t.z/zlev);\n"
"float uz = uAlpha + cos(zl) * cos(d) * cos(uCamera) + sin(zl) * sin(uCamera);\n"
"float ux = cos(zl) * sin(d) / uz;\n"
"t.xy = ux * t.xy / dd;\n"
"t.z = (sin(uCamera) * cos(zl) * cos(d) - sin(zl) * cos(uCamera)) / uz;\n"
;
}
else if(pmodel == mdDisk && MDIM == 3 && !spherespecial && !prod) {
shader_flags |= SF_DIRECT;
@@ -615,6 +644,15 @@ void display_data::set_projection(int ed, ld shift) {
if(selected->uAlpha != -1)
glhr::set_ualpha(pconf.alpha);
if(selected->uDepth != -1)
glUniform1f(selected->uDepth, vid.depth);
if(selected->uCamera != -1)
glUniform1f(selected->uCamera, vid.camera);
if(selected->uDepthScaling != -1)
glUniform1f(selected->uDepthScaling, pconf.depth_scaling);
if(selected->uLevelLines != -1) {
glUniform1f(selected->uLevelLines, levellines);
}