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flocking:: prevent crash in follow=2 when no boids found

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This commit is contained in:
Zeno Rogue 2020-03-20 19:50:15 +01:00
parent 7449a48198
commit c66fbe9ea0
1 changed files with 6 additions and 2 deletions
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8
rogueviz/flocking.cpp
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@ -283,12 +283,16 @@ namespace flocking {
// are taken), and normalize the result to project it back to the hyperboloid
// (the same method is commonly used on the sphere AFAIK)
hyperpoint h = Hypc;
bool ok = false;
for(int i=0; i<N; i++) if(gmatrix.count(vdata[i].m->base)) {
ok = true;
vdata[i].m->pat = gmatrix[vdata[i].m->base] * vdata[i].m->at;
h += tC0(vdata[i].m->pat);
}
h = normalize(h);
View = gpushxto0(h) * View;
if(ok) {
h = normalize(h);
View = inverse(actual_view_transform) * gpushxto0(h) * actual_view_transform * View;
}
}
optimizeview();