//
// Sanity-checking geometry generation
//
// Return a non-null error message if the mesh data is not identical
private static string Compare(
Vector3[] oldVerts, int iOldVert0, int iOldVert1,
int[] oldTris, int iOldTri0, int iOldTri1,
Vector2[] oldUv0s,
BaseBrushScript newBrush)
{
Vector3[] newVerts; int nNewVerts;
Vector2[] newUv0s;
int[] newTris; int nNewTris;
newBrush.DebugGetGeometry(out newVerts, out nNewVerts, out newUv0s, out newTris, out nNewTris);
if (nNewVerts != iOldVert1 - iOldVert0)
{
return("vert count mismatch");
}
for (int i = 0; i < nNewVerts; ++i)
{
Vector3 vo = oldVerts[iOldVert0 + i];
Vector3 vn = newVerts[i];
if (vo != vn)
{
return(string.Format("vert mismatch @ {0}/{1}", i, nNewVerts));
}
}
// Before enabling, we need a way of skipping this for brushes that
// legitimately want randomized UVs. There is also a known nondeterminism
// for QuadStripBrushStretchUV, though.
#if false
if (oldUv0s != null)
{
if (newUv0s == null)
{
return("uv0 mismatch (loaded mesh has no UVs)");
}
for (int i = 0; i < nNewVerts; ++i)
{
Vector2 uvo = oldUv0s[iOldVert0 + i];
Vector2 uvn = newUv0s[i];
if (uvo != uvn)
{
return(string.Format("uv mismatch @ {0}/{1}", i, nNewVerts));
}
}
}
#endif
if (nNewTris != iOldTri1 - iOldTri0)
{
return("tri count mismatch");
}
// Try to account for vert numbering
{
int triOffset = newTris[0] - oldTris[iOldTri0];
for (int i = 0; i < nNewTris; ++i)
{
int to = oldTris[iOldTri0 + i];
int tn = newTris[i];
if (to + triOffset != tn)
{
return(string.Format("tri mismatch @ {0}/{1}", i, nNewTris));
}
}
}
return(null);
}
