Resolution:
The rogue vertex colours were solved by triangulating the source mesh.
In the end I took a look at the DX9 sequencer - which I was surprised to find in
the SDK - my swizzle code now looks like:
XSI_RTS_TriangulatedGeometry tmpGeom = *in_pGeom;
if(in_pGeom->m_Type == RTS_TL_BYREF || in_pGeom->m_Type == RTS_TL_BYREF_POSD)
{
for(DWORD i = 0; i < in_pGeom->m_lNbTriangleLists; i++)
{
if(tmpGeom.m_pColorPtrArray)
{
tmpGeom.m_pColorPtrArray = in_pGeom->m_pColorPtrArray +
in_pGeom->m_pTriangleLists[i].m_lOffset;
}
for(DWORD j = 0; j < in_pGeom->m_pTriangleLists[i].m_lNbVertices; j++)
{
// Colors
if(in_pGeom->m_pColorPtrArray)
{
color1 = *tmpGeom.m_pColorPtrArray[j];
color.m_alpha = color1.m_alpha;
color.m_red = color1.m_blue;
color.m_green = color1.m_green;
color.m_blue = color1.m_red;
*tmpGeom.m_pColorPtrArray[j] = color;
}
}
}
}
else
{
ULONG* pIndex = in_pGeom->m_pIndices;
DWORD j;
// Draw triangles by ref (DOUBLE position)
for(DWORD i = 0; i < in_pGeom->m_lNbTriangleLists; i++)
{
for(j = 0, pIndex = in_pGeom->m_pIndices +
in_pGeom->m_pTriangleLists[i].m_lOffset; j <
in_pGeom->m_pTriangleLists[i].m_lNbVertices; j++, pIndex++)
{
int l_index = *pIndex;
if(in_pGeom->m_pColorArray)
{
color1 = in_pGeom->m_pColorArray[l_index];
color.m_alpha = color1.m_alpha;
color.m_red = color1.m_blue;
color.m_green = color1.m_green;
color.m_blue = color1.m_red;
in_pGeom->m_pColorArray[l_index] = color;
}
}
}
}
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