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embedding:: a simple general implementation of radar

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Zeno Rogue
2023-01-29 16:09:00 +01:00
parent 5c2b206433
commit ba03d33959
5 changed files with 24 additions and 118 deletions
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73
radar.cpp
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@@ -27,75 +27,20 @@ pair<bool, hyperpoint> makeradar(shiftpoint h) {
if(d >= vid.radarrange) return {false, h1};
if(d) h1 = h1 * (d / vid.radarrange / hypot_d(3, h1));
}
else if(mhyperbolic) {
if(cgi.emb->is_hyp_in_solnih()) {
geom3::light_flip(true);
h1 = parabolic1(h1[1]) * xpush0(h1[0]);
geom3::light_flip(false);
h1[3] = h1[2]; h1[2] = 0;
// h1 = current_display->radar_transform * h1;
}
for(int a=0; a<LDIM; a++) h1[a] = h1[a] / (1 + h1[LDIM]);
}
else if(msphere) {
if(cgi.emb->is_same_in_same()) h1[2] = h1[LDIM];
if(hyperbolic) h1 /= sinh(1);
}
else {
if(cgi.emb->is_euc_in_hyp()) {
for(int a=0; a<3; a++) h1[a] = h1[a] / (1 + h1[3]);
h1[2] -= 1;
h1 *= 2 / sqhypot_d(3, h1);
d = hypot_d(2, h1);
if(d > vid.radarrange) return {false, h1};
if(d) h1 = h1 / (vid.radarrange + cgi.scalefactor/4);
}
else if(cgi.emb->is_same_in_same()) {
if(d > vid.radarrange) return {false, h1};
if(d) h1 = h1 * (d / (vid.radarrange + cgi.scalefactor/4) / hypot_d(3, h1));
}
else if(cgi.emb->is_euc_in_sph()) {
h1[0] = atan2(h.h[0], h.h[2]);
h1[1] = atan2(h.h[1], h.h[3]);
h1[2] = 0;
h1 = cgi.emb->intermediate_to_logical * h1;
d = hypot_d(2, h1);
if(d > vid.radarrange) return {false, h1};
if(d) h1 = h1 / (vid.radarrange + cgi.scalefactor/4);
}
else if(cgi.emb->is_cylinder()) {
h1[0] = h.h[0];
h1[1] = atan2(h.h[1], h.h[2]);
h1[2] = 0;
h1 = cgi.emb->intermediate_to_logical * h1;
d = hypot_d(2, h1);
if(d > vid.radarrange) return {false, h1};
if(d) h1 = h1 / (vid.radarrange + cgi.scalefactor/4);
}
else if(cgi.emb->is_euc_in_sl2()) {
h1 = cgi.emb->intermediate_to_logical * cgi.emb->actual_to_intermediate(unshift(h)); h1[1] = -h1[1];
d = hypot_d(2, h1);
if(d > vid.radarrange) return {false, h1};
if(d) h1 = h1 / (vid.radarrange + cgi.scalefactor/4);
}
else if(cgi.emb->is_euc_in_product()) {
if(in_h2xe())
h1[0] = atanh(h.h[0] / h.h[2]);
else
h1[0] = atan2(h.h[2], h.h[0]);
h1[2] = - zlevel(h.h) - h.shift;
h1[1] = 0;
h1[3] = 0;
h1 = cgi.emb->intermediate_to_logical * h1;
d = hypot_d(2, h1);
if(d > vid.radarrange) return {false, h1};
if(d) h1 = h1 / (vid.radarrange + cgi.scalefactor/4);
}
else {
h1 = cgi.emb->actual_to_base(h.h);
h1 = current_display->radar_transform_post * h1;
if(mhyperbolic) {
h1[LDIM] = h1[2]; h1[2] = 0;
for(int a=0; a<LDIM; a++) h1[a] = h1[a] / (1 + h1[LDIM]);
h1[3] *= 2;
}
if(meuclid) {
d = hypot_d(2, h1);
if(d > vid.radarrange) return {false, h1};
if(d) h1 = h1 / (vid.radarrange + cgi.scalefactor/4);
}
/* no change for sphere! */
}
if(invalid_point(h1)) return {false, h1};
return {true, h1};