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more accurate mouse when in 2D projections

This commit is contained in:
Zeno Rogue 2020-04-19 23:22:41 +02:00
parent fc9adf8960
commit d09acee7a8
1 changed files with 33 additions and 6 deletions
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39
hypgraph.cpp
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@ -8,16 +8,15 @@
#include "hyper.h"
namespace hr {
ld ghx, ghy, ghgx, ghgy;
hyperpoint ghpm = C0;
hyperpoint ghxy, ghgxy, ghpm = C0;
#if HDR
inline bool sphereflipped() { return sphere && pconf.alpha > 1.1 && GDIM == 3; }
#endif
void ghcheck(hyperpoint &ret, const hyperpoint &H) {
if(hypot(ret[0]-ghx, ret[1]-ghy) < hypot(ghgx-ghx, ghgy-ghy)) {
ghpm = H; ghgx = ret[0]; ghgy = ret[1];
if(hypot_d(2, ret-ghxy) < hypot_d(2, ghgxy-ghxy)) {
ghpm = H; ghgxy = ret;
}
}
@ -89,10 +88,38 @@ EX hyperpoint gethyper(ld x, ld y) {
ld hx = (x - current_display->xcenter) / current_display->radius;
ld hy = (y - current_display->ycenter) / current_display->radius / pconf.stretch;
hyperpoint hxy = point3(hx, hy, 0);
if(pmodel) {
ghx = hx, ghy = hy;
return ghpm;
ghxy = hxy;
transmatrix T = rgpushxto0(ghpm);
auto distance_at = [&] (const transmatrix& T1) {
hyperpoint h1;
applymodel(tC0(T1), h1);
return sqhypot_d(2, hxy - h1);
};
ld best = distance_at(T);
for(int it=0; it<50; it++)
for(int s=0; s<4; s++) {
transmatrix T1 = T * spin(s * quarter_circle) * xpush(pow(1.2, -it));
ld dist = distance_at(T1);
if(dist < best) best = dist, T = T1;
if(mdBandAny()) {
band_shift += 2 * M_PI;
dist = distance_at(T1);
if(dist < best) best = dist, T = T1;
band_shift -= 4 * M_PI;
dist = distance_at(T1);
if(dist < best) best = dist, T = T1;
band_shift += 2 * M_PI;
}
}
return tC0(T);
}
if(pconf.camera_angle) camrotate(hx, hy);