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point_behind returns true if point is too close to z=0

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Zeno Rogue 2019-08-19 11:04:56 +02:00
parent 9c7c60dcfa
commit 23f9736722
1 changed files with 3 additions and 1 deletions
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4
hypgraph.cpp
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@ -321,6 +321,7 @@ EX void applymodel(hyperpoint H, hyperpoint& ret) {
ld ratio = vid.xres / current_display->tanfov / current_display->radius / 2;
if(prod) H = product::inverse_exp(H);
if(nisot::local_perspective_used()) H = nisot::local_perspective * H;
if(H[2] == 0) { ret[0] = 1e6; ret[1] = 1e6; ret[2] = 1; return; }
ret[0] = H[0]/H[2] * ratio;
ret[1] = H[1]/H[2] * ratio;
ret[2] = 1;
@ -937,8 +938,9 @@ EX bool point_behind(hyperpoint h) {
if(sphere) return false;
if(!in_perspective()) return false;
if(pmodel == mdGeodesic) h = nisot::inverse_exp(h, nisot::iLazy);
if(pmodel == mdPerspective && prod) h = product::inverse_exp(h);
if(nisot::local_perspective_used()) h = nisot::local_perspective * h;
return h[2] < 0;
return h[2] < 1e-8;
}
void raise_error() {