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ads:: future in AdS shown correctly (using light-like geodesics); show future for dS

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Zeno Rogue
2022-09-25 22:20:18 +02:00
parent c49b320330
commit 4af232e9c1
3 changed files with 55 additions and 14 deletions
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25
rogueviz/ads/ds-game.cpp
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@@ -190,6 +190,15 @@ cross_result ds_cross0(transmatrix T) {
return res;
}
cross_result ds_cross0_light(transmatrix T) {
// h = T * (t 0 1 t); h[3] == 0
ld t = T[3][2] / -(T[3][0] + T[3][3]);
cross_result res;
res.shift = t;
res.h = T * hyperpoint(t, 0, 1, t);
return res;
}
transmatrix tpt(ld x, ld y) {
return cspin(0, 2, x * scale) * cspin(1, 2, y * scale);
}
@@ -292,6 +301,22 @@ void view_ds_game() {
string str = format(tformat, view_pt / time_unit);
queuestr(shiftless(Id), .1, str, 0xFFFF00, 8);
}
if(paused && !game_over) {
vector<hyperpoint> pts;
int ok = 0, bad = 0;
for(int i=0; i<=360; i++) {
dynamicval<eGeometry> g(geometry, gSpace435);
auto h = inverse(dscurrent_ship) * spin(i*degree);
auto cr = ds_cross0_light(dscurrent * h);
pts.push_back(cr.h);
if(cr.shift > 0) ok++; else bad++;
}
if(bad == 0) {
for(auto h: pts) curvepoint(h);
queuecurve(shiftless(Id), 0xFF0000C0, 0x00000060, PPR::SUPERLINE);
}
}
}
}