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irregular maps in Euclidean

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Zeno Rogue
2019-11-27 01:03:57 +01:00
parent 51c1d49628
commit 999eec6650
2 changed files with 22 additions and 3 deletions
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20
irregular.cpp
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@@ -45,7 +45,8 @@ EX vector<cellinfo> cells;
ld inner(hyperpoint h1, hyperpoint h2) {
return
hyperbolic ? h1[LDIM] * h2[LDIM] - h1[0] * h2[0] - h1[1] * h2[1] :
h1[LDIM] * h2[LDIM] + h1[0] * h2[0] + h1[1] * h2[1];
sphere ? h1[LDIM] * h2[LDIM] + h1[0] * h2[0] + h1[1] * h2[1] :
h1[0] * h2[0] + h1[1] * h2[1];
}
hyperpoint circumscribe(hyperpoint a, hyperpoint b, hyperpoint c) {
@@ -54,6 +55,20 @@ hyperpoint circumscribe(hyperpoint a, hyperpoint b, hyperpoint c) {
b = b - a;
c = c - a;
if(euclid) {
ld b2 = inner(b, b)/2;
ld c2 = inner(c, c)/2;
ld det = c[1]*b[0] - b[1]*c[0];
h = a;
h[1] += (c2*b[0] - b2 * c[0]) / det;
h[0] += (c2*b[1] - b2 * c[1]) / -det;
return h;
}
if(inner(b,b) < 0) {
b = b / sqrt(-inner(b, b));
c = c + b * inner(c, b);
@@ -104,7 +119,7 @@ void make_cells_of_heptagon() {
string status[5];
hrmap *base;
EX hrmap *base;
bool gridmaking;
@@ -1077,6 +1092,7 @@ EX bool ctof(cell* c) {
}
EX bool supports(eGeometry g) {
if(g == gEuclid || g == gEuclidSquare) return ginf[g].flags & qBOUNDED;
return among(g, gNormal, gKleinQuartic, gOctagon, gBolza2, gFieldQuotient, gSphere, gSmallSphere, gTinySphere);
}