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Asteroids

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Zeno Rogue
2019-03-30 17:51:37 +01:00
parent 4727e71590
commit 5356eba11c
12 changed files with 216 additions and 34 deletions
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13
hyperpoint.cpp
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@@ -136,9 +136,6 @@ hyperpoint hpxy3(ld x, ld y, ld z) {
return hpxyz3(x,y,z, euclid ? 1 : sphere ? sqrt(1-x*x-y*y-z*z) : sqrt(1+x*x+y*y+z*z));
}
// center of the pseudosphere
const hyperpoint Hypc = hyperpoint(0,0,0,0);
// origin of the hyperbolic plane
const hyperpoint C02 = hyperpoint(0,0,1,0);
const hyperpoint C03 = hyperpoint(0,0,0,1);
@@ -241,6 +238,16 @@ transmatrix cspin(int a, int b, ld alpha) {
transmatrix spin(ld alpha) { return cspin(0, 1, alpha); }
transmatrix random_spin() {
if(DIM == 2) return spin(randd() * 2 * M_PI);
else {
ld alpha2 = acos(randd() * 2 - 1);
ld alpha = randd() * 2 * M_PI;
ld alpha3 = randd() * 2 * M_PI;
return cspin(0, 1, alpha) * cspin(0, 2, alpha2) * cspin(1, 2, alpha3);
}
}
transmatrix eupush(ld x, ld y) {
transmatrix T = Id;
T[0][DIM] = x;