Well, this is fast render function I made for a point sprite. I made this fast example because wanna have a look at how point sprites were. But I have found a weird prob. If I set the position to (0,0,2), the point sprite is well positioned and it shows nice. But If I set position for example to (1,0,2) the point sprites moves a lot to the right... it sometimes disapears (depending on the camera). The thing is, what am I doing wrong? I have checked a lot of sources and they do the same I do here
. Could anybody help me here pls? I would be really greatefull. Heres is the source code:
bool CnParticleSystem::Update(float fElapsedTime)
{
LPDIRECT3DDEVICE9 pD=pDev;
//Set Render States for Sprites
pDev->SetRenderState(D3DRS_CULLMODE,D3DCULL_NONE);
pDev->SetRenderState(D3DRS_FILLMODE,D3DFILL_SOLID);
pDev->SetRenderState(D3DRS_LIGHTING, FALSE);
pDev->SetRenderState(D3DRS_ZENABLE, FALSE);
// Set the render states for using point sprites
pDev->SetRenderState(D3DRS_POINTSPRITEENABLE, TRUE);
pDev->SetRenderState(D3DRS_POINTSCALEENABLE, TRUE);
pDev->SetRenderState(D3DRS_POINTSIZE, FtoDW(100.0f));
pDev->SetRenderState(D3DRS_POINTSCALE_A, FtoDW(0.00f));
pDev->SetRenderState(D3DRS_POINTSCALE_B, FtoDW(0.00f));
pDev->SetRenderState(D3DRS_POINTSCALE_C, FtoDW(1.00f));
pDev->SetRenderState( D3DRS_POINTSIZE_MIN, FtoDW(0.00f) );
pDev->SetRenderState( D3DRS_POINTSIZE_MAX, FtoDW(1000.00f) );
D3DXMATRIX WorldMatrix;
//Set Project and View Transformation matrices
D3DXMATRIX matProj;
D3DXMatrixPerspectiveFovLH (&matProj,45/180,640/480,1,1000);
pDev->SetTransform(D3DTS_PROJECTION, &matProj);
D3DXMATRIX matView;
D3DXMatrixLookAtLH(&matView,&D3DXVECTOR3(0.0f, 0.0f, -10.0f),
&D3DXVECTOR3(0.0f, 0.0f, 1.0f),
&D3DXVECTOR3(0.0f, 1.0f, 0.0f));
pDev->SetTransform(D3DTS_VIEW, &matView);
D3DXMatrixIdentity(&WorldMatrix);
pDev->SetTransform(D3DTS_WORLD, &WorldMatrix);
//some vars used to access vertex buffer
LPDIRECT3DDEVICE9 m_pD=pDev;
TParticleVertex* pVertices;
TPD3DVB pVB=m_oVB.GetPointer();
void* pVBData;
if(pVB->Lock(0,sizeof(TParticleVertex)*1,(void**)&pVBData,0) != D3D_OK)
{
CnLog::SysLog(eLowLevel,"\r\r\nError Could not lock vertex buffer.","Error!");
return false;
}
pVertices=(TParticleVertex*)pVBData;
pVertices[0].Pos.x=0.0f; //it shows now but if I set it to
pVertices[0].Pos.y=0; //1.0f for example, it doesn´t :(
pVertices[0].Pos.z=2;
pVertices[0].Color=0xFFFFFFFF;
//Render the point sprites
if(pVB->Unlock() != D3D_OK)
{
CnLog::SysLog(eLowLevel,"Could not UnLock Vertex Buffer");
return false;
}
if(pDev->SetTexture(0,((CnTexture*)CnGraphicApp::m_oTexMgr.Get(m_nTexID))->GetData())!=D3D_OK)
return false;
//decimos a d3d de donde ha de sacar los vertices y los indices
if(pDev->SetStreamSource(0, pVB, 0, sizeof(TParticleVertex))!=D3D_OK)
return false;
//SetVertexShader(NULL);
if(pDev->SetFVF(PARTICLE_FVF)!=D3D_OK)
return false;
if(pDev->DrawPrimitive(D3DPT_POINTLIST,0,1)!=D3D_OK){
return false;
}
pDev->SetRenderState(D3DRS_POINTSPRITEENABLE, FALSE);
pDev->SetRenderState(D3DRS_POINTSCALEENABLE, FALSE);
return true;
}
thanks in advance,
HexDump.
