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rogueviz::snow:: random_snow_matrix as a separate function

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This commit is contained in:
Zeno Rogue 2020-03-31 22:19:19 +02:00
parent 00735cac90
commit 08032809a2
1 changed files with 45 additions and 45 deletions
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90
rogueviz/snow.cpp
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@ -43,6 +43,49 @@ hpcshape& shapeid(int i) {
} }
} }
transmatrix random_snow_matrix(cell *c) {
if(snow_glitch) {
// in the standard tiling, this is incorrect but fun
hyperpoint h = C0;
h[0] = randd() - .5;
h[1] = randd() - .5;
h[2] = randd() - .5;
h[2] = -h[2];
return rgpushxto0(h);
}
else if(nonisotropic || bt::in()) {
int co = bt::expansion_coordinate();
ld aer = bt::area_expansion_rate();
hyperpoint h;
// randd() - .5;
for(int a=0; a<3; a++) {
if(a != co || aer == 1)
h[a] = randd() * 2 - 1;
else {
ld r = randd();
h[co] = log(lerp(1, aer, r)) / log(aer) * 2 - 1;
}
}
return bt::normalized_at(h);
}
else {
while(true) {
ld maxr = WDIM == 2 ? cgi.rhexf : cgi.corner_bonus;
ld vol = randd() * wvolarea_auto(maxr);
ld r = binsearch(0, maxr, [vol] (ld r) { return wvolarea_auto(r) > vol; });
transmatrix T = random_spin();
hyperpoint h = T * xpush0(r);
cell* c1 = c;
virtualRebase(c1, h);
if(c1 == c)
return T * xpush(r);
}
}
}
bool draw_snow(cell *c, const transmatrix& V) { bool draw_snow(cell *c, const transmatrix& V) {
if(!matrices_at.count(c)) { if(!matrices_at.count(c)) {
@ -64,52 +107,9 @@ bool draw_snow(cell *c, const transmatrix& V) {
cnt = snow_lambda; cnt = snow_lambda;
} }
} }
if(snow_glitch) {
// in the standard tiling, this is incorrect but fun
for(int t=0; t<cnt; t++) {
hyperpoint h = C0;
h[0] = randd() - .5;
h[1] = randd() - .5;
h[2] = randd() - .5;
h[2] = -h[2];
v.push_back(rgpushxto0(h));
}
}
else if(nonisotropic || bt::in()) {
int co = bt::expansion_coordinate(); for(int t=0; t<cnt; t++)
ld aer = bt::area_expansion_rate(); v.push_back(random_snow_matrix(c));
for(int t=0; t<cnt; t++) {
hyperpoint h;
// randd() - .5;
for(int a=0; a<3; a++) {
if(a != co || aer == 1)
h[a] = randd() * 2 - 1;
else {
ld r = randd();
h[co] = log(lerp(1, aer, r)) / log(aer) * 2 - 1;
}
}
h = tC0(bt::normalized_at(h));
v.push_back(rgpushxto0(h));
}
}
else {
while(isize(v) < cnt) {
ld maxr = WDIM == 2 ? cgi.rhexf : cgi.corner_bonus;
ld vol = randd() * wvolarea_auto(maxr);
ld r = binsearch(0, maxr, [vol] (ld r) { return wvolarea_auto(r) > vol; });
transmatrix T = random_spin();
hyperpoint h = T * xpush0(r);
cell* c1 = c;
virtualRebase(c1, h);
if(c1 == c)
v.push_back(T * xpush(r));
}
}
} }
poly_outline = 0xFF; poly_outline = 0xFF;