/*-----------------------------------------------------------------------------
Name : btgConvertVerts
Description : transforms 2D BTG vertices into 3D
Inputs :
Outputs : btgTransVerts, btgTransStars are allocated and initialized
Return :
----------------------------------------------------------------------------*/
void btgConvertVerts()
{
udword nVert, nPoly, index;
btgTransVertex* pTransVert;
btgTransStar* pTransStar;
btgPolygon* pPoly;
btgZip();
btgTransVerts = memAlloc(btgHead->numVerts * sizeof(btgTransVertex), "btg trans verts", NonVolatile);
if (useVBO) glGenBuffers(1, &vboTransVerts);
if (btgHead->numStars > 0)
{
btgTransStars = memAlloc(btgHead->numStars * sizeof(btgTransStar), "btg trans stars", NonVolatile);
if (useVBO) glGenBuffers(1, &vboTransStars);
}
else
{
btgTransStars = NULL;
}
for (nVert = 0, pTransVert = btgTransVerts;
nVert < btgHead->numVerts;
nVert++, pTransVert++)
{
btgConvertVert(pTransVert, nVert);
}
for (nVert = 0, pTransStar = btgTransStars; nVert < btgHead->numStars; nVert++, pTransStar++)
{
btgConvertStar(pTransStar, nVert);
}
for (nPoly = 0, index = 0, pPoly = btgPolys;
nPoly < btgHead->numPolys;
nPoly++, pPoly++, index += 3)
{
btgIndices[index + 0] = pPoly->v0;
btgIndices[index + 1] = pPoly->v1;
btgIndices[index + 2] = pPoly->v2;
}
if (useVBO) {
glBindBuffer(GL_ARRAY_BUFFER, vboTransStars);
glBufferData(GL_ARRAY_BUFFER, btgHead->numStars * sizeof(btgTransStar), btgTransStars, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, vboIndices);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, btgHead->numPolys * 3 * sizeof(uword), btgIndices, GL_STATIC_DRAW);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
}
}
/*-----------------------------------------------------------------------------
Name : btgConvertVerts
Description : transforms 2D BTG vertices into 3D
Inputs :
Outputs : btgTransVerts, btgTransStars are allocated and initialized
Return :
----------------------------------------------------------------------------*/
void BtgBackground::btgConvertVerts()
{
udword nVert, nPoly, index;
btgTransVertex* pTransVert;
btgTransStar* pTransStar;
BtgBackground::btgPolygon* pPoly;
//btgZip();
btgTransVerts = (btgTransVertex *)malloc(btgHead->numVerts * sizeof(btgTransVertex));
if (btgHead->numStars > 0)
{
btgTransStars = (btgTransStar *)malloc(btgHead->numStars * sizeof(btgTransStar));
}
else
{
btgTransStars = NULL;
}
for (nVert = 0, pTransVert = btgTransVerts;
nVert < btgHead->numVerts;
nVert++, pTransVert++)
{
btgConvertVert(pTransVert, nVert);
}
for (nVert = 0, pTransStar = btgTransStars; nVert < btgHead->numStars; nVert++, pTransStar++)
{
btgConvertStar(pTransStar, nVert);
}
for (nPoly = 0, index = 0, pPoly = btgPolys;
nPoly < btgHead->numPolys;
nPoly++, pPoly++, index += 3)
{
btgIndices[index + 0] = pPoly->v0;
btgIndices[index + 1] = pPoly->v1;
btgIndices[index + 2] = pPoly->v2;
}
}
