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three new projections

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Zeno Rogue
2020-08-20 16:02:34 +02:00
parent c9e0529a88
commit 64cb6772e8
4 changed files with 92 additions and 5 deletions
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17
drawing.cpp
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@@ -262,14 +262,19 @@ void add1(const hyperpoint& H) {
glcoords.push_back(glhr::pointtogl(H));
}
int axial_sign() {
return ((axial_x ^ axial_y)&1) ? -1:1;
}
bool is_behind(const hyperpoint& H) {
if(pmodel == mdAxial && sphere) return axial_sign() * H[2] <= BEHIND_LIMIT;
return pmodel == mdDisk && (hyperbolic ? H[2] >= 0 : true) && (nonisotropic ? false : pconf.alpha + H[2] <= BEHIND_LIMIT);
}
hyperpoint be_just_on_view(const hyperpoint& H1, const hyperpoint &H2) {
// H1[2] * t + H2[2] * (1-t) == BEHIND_LIMIT - pconf.alpha
// H2[2]- BEHIND_LIMIT + pconf.alpha = t * (H2[2] - H1[2])
ld t = (H2[2] - BEHIND_LIMIT + pconf.alpha) / (H2[2] - H1[2]);
ld t = (axial_sign() * H2[2] - BEHIND_LIMIT + (pmodel == mdAxial ? 0 : pconf.alpha)) / (H2[2] - H1[2]) * axial_sign();
return H1 * t + H2 * (1-t);
}
@@ -2136,6 +2141,16 @@ EX void draw_main() {
}
#endif
}
else if(pmodel == mdAxial && sphere) {
for(auto& ptd: ptds) if(ptd->prio == PPR::OUTCIRCLE)
ptd->draw();
for(axial_x=-4; axial_x<=4; axial_x++)
for(axial_y=-4; axial_y<=4; axial_y++)
for(auto& ptd: ptds) if(ptd->prio != PPR::OUTCIRCLE) {
ptd->draw();
}
glflush();
}
else {
DEBB(DF_GRAPH, ("draw_main1"));
if(ray::in_use && !ray::comparison_mode) {