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add RageDisplay::DrawSymmetricQuadStrip

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This commit is contained in:
Glenn Maynard
2007-01-15 08:08:57 +00:00
parent ce407f819f
commit 74aaecc2b9
7 changed files with 107 additions and 0 deletions
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stepmania/src/RageDisplay_OGL.cpp
+39
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@@ -1209,6 +1209,45 @@ void RageDisplay_OGL::DrawQuadStripInternal( const RageSpriteVertex v[], int iNu
glDrawArrays( GL_QUAD_STRIP, 0, iNumVerts );
}
void RageDisplay_OGL::DrawSymmetricQuadStripInternal( const RageSpriteVertex v[], int iNumVerts )
{
int iNumPieces = (iNumVerts-3)/3;
int iNumTriangles = iNumPieces*4;
int iNumIndices = iNumTriangles*3;
// make a temporary index buffer
static vector<uint16_t> vIndices;
unsigned uOldSize = vIndices.size();
unsigned uNewSize = max(uOldSize,(unsigned)iNumIndices);
vIndices.resize( uNewSize );
for( uint16_t i=(uint16_t)uOldSize/12; i<(uint16_t)iNumPieces; i++ )
{
// { 1, 3, 0 } { 1, 4, 3 } { 1, 5, 4 } { 1, 2, 5 }
vIndices[i*12+0] = i*3+1;
vIndices[i*12+1] = i*3+3;
vIndices[i*12+2] = i*3+0;
vIndices[i*12+3] = i*3+1;
vIndices[i*12+4] = i*3+4;
vIndices[i*12+5] = i*3+3;
vIndices[i*12+6] = i*3+1;
vIndices[i*12+7] = i*3+5;
vIndices[i*12+8] = i*3+4;
vIndices[i*12+9] = i*3+1;
vIndices[i*12+10] = i*3+2;
vIndices[i*12+11] = i*3+5;
}
TurnOffHardwareVBO();
SendCurrentMatrices();
SetupVertices( v, iNumVerts );
glDrawElements(
GL_TRIANGLES,
iNumIndices,
GL_UNSIGNED_SHORT,
&vIndices[0] );
}
void RageDisplay_OGL::DrawFanInternal( const RageSpriteVertex v[], int iNumVerts )
{
TurnOffHardwareVBO();