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fixed the computation in spherical equi-models so that antipode appears at radius

This commit is contained in:
Zeno Rogue 2017-11-13 01:29:31 +01:00
parent c682b0d94c
commit 6efc503818
1 changed files with 6 additions and 3 deletions
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9
hypgraph.cpp
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@ -153,12 +153,15 @@ void applymodel(hyperpoint H, hyperpoint& ret) {
if(pmodel == mdEquidistant || pmodel == mdEquiarea) {
ld rad = sqrt(H[0] * H[0] + H[1] * H[1]);
ld d = hdist0(H);
// 4 pi / 2pi = M_PI
if(pmodel == 6 && sphere)
d = sqrt(2*(1 - cos(d))) * 1.25; // /1.5 to make it fit on the screen better
d = sqrt(2*(1 - cos(d))) * M_PI / 2;
else if(pmodel == 6 && !euclid)
d = sqrt(2*(cosh(d) - 1)) / 1.5;
ret[0] = d * H[0] / rad / 4;
ret[1] = d * H[1] / rad / 4;
ret[0] = d * H[0] / rad / M_PI;
ret[1] = d * H[1] / rad / M_PI;
ret[2] = 0;
if(zlev != 1 && vid.goteyes)
ret[2] = geom3::factor_to_lev(zlev);