I'm having some memory/pointer problems in my engine, and I hope
someone could help me...
I have a class called CPolygon which looks something like this:
code:int m_iNumVertices; int m_pVertices[ 8 ]; CTextureCoord m_pTextureCoords[ 8 ]; int m_iTexture; int m_iLightmap; CPlane m_cPlane; long m_bRendered; CPolygon(int iNumVerts) { m_iNumVertices = iNumVerts; m_iTexture = BM_TEXTURE_NONE; m_iLightmap = BM_TEXTURE_NONE; m_cPlane = CPlane(); m_bRendered = 0; //Set to frame number }
Now, because switching between texture in hardware can be slow, I want to use
a system of sorting my polygon by their texture, and draw all the polygon with
one texture first, and so on. So I created a new class...
code:class CPolygonSystem { public: CPolygon *m_cPolygons; int m_iMaxPolygons; int m_iNumPolygons; CPolygon *m_cSorted; CPolygonSystem(int iPolygons) { m_cPolygons = (CPolygon*)new CPolygon[iPolygons]; m_cSorted = (CPolygon*)new CPolygon[iPolygons]; m_iMaxPolygons = iPolygons; m_iNumPolygons = 0; } ~CPolygonSystem() { delete m_cPolygons; delete m_cSorted; m_iMaxPolygons = 0; m_iNumPolygons = 0; } CPolygon *GetPolygon(int iNum) { return (CPolygon*)&m_cPolygons[iNum]; } void _GetPolygon(CPolygon *poly, int iNum) { memcpy( (CPolygon*)poly, (CPolygon*)&m_cPolygons[iNum], sizeof(CPolygon) ); } void AddPolygonToRender(CPolygon *Polygon) { m_iNumPolygons += 1; if(m_iNumPolygons < m_iMaxPolygons ) { memcpy( (CPolygon*)&m_cPolygons[m_iNumPolygons - 1], (CPolygon*)&Polygon, sizeof( CPolygon ) ); } }};
Now I wanted to test this system...
code:CPolygonSystem *cSyst = new CPolygonSystem(1000); CPolygon *Poly = new CPolygon(5); Poly->m_iTexture = 153; cSyst->AddPolygonToRender( Poly ); CPolygon *Tmp;// cSyst->_GetPolygon( Tmp, 0 ); Tmp = cSyst->GetPolygon( 0 ); log_file = fopen("beam.txt","wt"); handle_error( ERROR_CONSOLE, "Numverts %d - Texture %d", Tmp->m_iNumVertices, Tmp->m_iTexture); handle_error( ERROR_CONSOLE, "\nNumverts %d - Texture %d", Poly->m_iNumVertices, Poly->m_iTexture); fclose(log_file);
Now this gives the output:
Numverts 7866096 - Texture 1984
Numverts 5 - Texture 153
Not really what I wanted it too, when I use the _GetPolygon instead, the program crashes.
Any idea what could be the problem?
TIA, Tobias
