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Experimental: add "XactCylinder" to make a better patch cylinder

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This commit is contained in:
Rudolf Polzer
2011-10-07 11:56:48 +02:00
parent 9c436e5a25
commit 66cbc01bb8
3 changed files with 37 additions and 0 deletions
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radiant/patch.cpp
+27
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@@ -1400,6 +1400,33 @@ void Patch::ConstructPrefab(const AABB& aabb, EPatchPrefab eType, int axis, std:
return;
}
}
else if (eType == eXactCylinder)
{
int n = 6; // n = number of segments
setDims(2 * n + 1, 3);
// vPos[0] = vector3_subtracted(aabb.origin, aabb.extents);
// vPos[1] = aabb.origin;
// vPos[2] = vector3_added(aabb.origin, aabb.extents);
int i, j;
float f = 1 / cos(M_PI / n);
for(i = 0; i < 2*n+1; ++i)
{
float angle = (M_PI * i) / n;
float x = vPos[1][0] + cos(angle) * (vPos[2][0] - vPos[1][0]) * ((i&1) ? f : 1.0f);
float y = vPos[1][1] + sin(angle) * (vPos[2][1] - vPos[1][1]) * ((i&1) ? f : 1.0f);
for(j = 0; j < 3; ++j)
{
float z = vPos[j][2];
PatchControl *v;
v = &m_ctrl.data()[j*(2*n+1)+i];
v->m_vertex[0] = x;
v->m_vertex[1] = y;
v->m_vertex[2] = z;
}
}
}
else if (eType == eBevel)
{
unsigned char *pIndex;