OK ive spent the past few hours trying to work out the problem with my DrawPolygon function. Here it is:
void DrawPolygon(C2DVert *pVert,int NumVerts,IDirect3DDevice8*device)
{
VOID* Vertices = NULL;
IDirect3DVertexBuffer8 *pVB;
//create the vertex buffer
if(device->CreateVertexBuffer(NumVerts*sizeof(C2DVert), 0, FVF2D_PLAIN,
D3DPOOL_DEFAULT, &pVB)!=D3D_OK)
{
MessageBox(NULL,"Error Creating Vertex Buffer","Error",MB_OK);
}
//lock and copy the square
if(pVB->Lock(0, 0, (BYTE**)&Vertices, 0)!=D3D_OK)
{
MessageBox(NULL,"Error Locking","Error",MB_OK);
}
memcpy(Vertices, pVert, sizeof(pVert));
//unlock
pVB->Unlock();
device->SetStreamSource(0, pVB, sizeof(C2DVert));
if(device->DrawPrimitive(D3DPT_LINELIST , 0, NumVerts/2) != D3D_OK)
{
MessageBox(NULL,"Error Drawing Primative","Error",MB_OK);
}
pVB->Release();
pVB = NULL;
}
Heres my fvf and vertex class
// 2d vertex
const DWORD FVF2D_PLAIN = (D3DFVF_XYZRHW | D3DFVF_DIFFUSE);
class C2DVert
{
public:
float m_x,m_y,m_z;
float m_rhw;
DWORD diffuse;
void set(float x, float y, DWORD colour)
{
m_x = x;
m_y = y;
m_z = 0.5;
m_rhw = 1.0;
diffuse = colour;
}
};
and heres how i call the function
pPoly[0].set(20, 20,D3DCOLOR_ARGB(255,255,0,0));
pPoly[1].set(100,20,D3DCOLOR_ARGB(255,255,255,0));
pPoly[2].set(100,200,D3DCOLOR_ARGB(255,255,0,255));
pPoly[3].set(300,400,D3DCOLOR_ARGB(255,0,255,0));
DrawPolygon(pPoly,4,pScreen->getDevice());
NOTE: I know i dont set the vertex shader here, because i do it somwhere else, and that isnt the problem as i have otherfunctions which render without vertex buffers and they work fine.
Thanks for your help in advance.
Ash
