void SnowParticle::Render()
{
if (m_device)
{
//设置状态
m_device->SetRenderState(D3DRS_ALPHABLENDENABLE, true);
//设置alpha混合因子
m_device->SetRenderState(D3DRS_SRCBLEND, D3DBLEND_ONE);
m_device->SetRenderState(D3DRS_DESTBLEND, D3DBLEND_ONE);
m_device->SetRenderState(D3DRS_POINTSPRITEENABLE, true);
m_device->SetRenderState(D3DRS_POINTSCALEENABLE, true);
//m_device->SetRenderState(D3DRS_LIGHTING, false);
//设置粒子大小
//设置
m_device->SetRenderState(D3DRS_POINTSIZE, FloatToDword(1.0f));
m_device->SetRenderState(D3DRS_POINTSIZE_MIN, FloatToDword(0.00f));
m_device->SetRenderState(D3DRS_POINTSCALE_A, FloatToDword(0.00f));
m_device->SetRenderState(D3DRS_POINTSCALE_B, FloatToDword(0.00f));
m_device->SetRenderState(D3DRS_POINTSCALE_C, FloatToDword(1.00f));
//设置数据源和纹理
m_device->SetStreamSource(0, m_vb, 0, sizeof(POINTVERTEX));
m_device->SetFVF(D3DFVF_POINTVERTEX);
POINTVERTEX *vertex = 0;
//锁住顶点
m_vb->Lock(0, 0, (void **)&vertex, 0);
int numToRender = 0;
for (std::vector<Particle>::iterator it = m_snowPartices.begin();
it != m_snowPartices.end();
it++)
{
if (it->isLive)
{
vertex->pos = it->position;
vertex->color = it->color;
numToRender++;
vertex++;
}
}
m_vb->Unlock();
int numParticlePerTex = numToRender / m_snowTextures.size();
for (int i = 0; i < m_snowTextures.size(); i++)
{
m_device->SetTexture(0, m_snowTextures[i]);
m_device->DrawPrimitive(D3DPT_POINTLIST, numParticlePerTex * i, numParticlePerTex);
}
int remainToRender = numToRender - numParticlePerTex * m_snowTextures.size();
if (remainToRender > 0)
m_device->DrawPrimitive(D3DPT_POINTLIST, 0, remainToRender);
m_device->SetRenderState(D3DRS_ALPHABLENDENABLE, false);
}
}
void Balls::Render()
{
// Set render state
device->SetRenderState( D3DRS_ALPHABLENDENABLE, TRUE );
device->SetRenderState( D3DRS_SRCBLEND, D3DBLEND_ONE );
device->SetRenderState( D3DRS_DESTBLEND, D3DBLEND_ONE );
device->SetRenderState( D3DRS_POINTSPRITEENABLE, TRUE) ;
device->SetRenderState( D3DRS_POINTSCALEENABLE, TRUE) ;
device->SetRenderState( D3DRS_POINTSIZE, FloatToDword(0.5f) );
device->SetRenderState( D3DRS_POINTSIZE_MIN, FloatToDword(0.00f) );
device->SetRenderState( D3DRS_POINTSCALE_A, FloatToDword(0.00f) );
device->SetRenderState( D3DRS_POINTSCALE_B, FloatToDword(0.00f) );
device->SetRenderState( D3DRS_POINTSCALE_C, FloatToDword(1.00f) );
// Set texture
device->SetTexture(0, texture) ;
device->SetStreamSource( 0, pVB, 0, sizeof(POINTVERTEX));
device->SetFVF(D3DFVF_POINTVERTEX) ;
// Start at beginning if we reach the end of vb
if(vbOffset >= vbSize)
vbOffset = 0 ;
POINTVERTEX* v ;
pVB->Lock(
vbOffset * sizeof(POINTVERTEX),
vbBatchSize * sizeof(POINTVERTEX),
(void**)&v,
vbOffset ? D3DLOCK_NOOVERWRITE : D3DLOCK_DISCARD
) ;
DWORD numParticleinBatch = 0 ;
for (vector<Particle>::iterator citor = buffer.begin(); citor != buffer.end(); ++citor)
{
if (citor->isLive) // Only draw live particles
{
v->pos = citor->position ;
v->color = 0xff00ff00 ;
v++ ;
numParticleinBatch++ ;
if (numParticleinBatch == vbBatchSize)
{
pVB->Unlock() ;
device->DrawPrimitive( D3DPT_POINTLIST, vbOffset, vbBatchSize) ;
vbOffset += vbBatchSize ;
if (vbOffset >= vbSize)
vbOffset = 0 ;
pVB->Lock(
vbOffset * sizeof(POINTVERTEX),
vbBatchSize * sizeof(POINTVERTEX),
(void**)&v,
vbOffset ? D3DLOCK_NOOVERWRITE : D3DLOCK_DISCARD
) ;
numParticleinBatch = 0 ;
}
}
}
pVB->Unlock() ;
// Render the left particles
if (numParticleinBatch)
{
device->DrawPrimitive(
D3DPT_POINTLIST,
vbOffset,
numParticleinBatch
) ;
}
// Restore state
device->SetRenderState( D3DRS_ALPHABLENDENABLE, FALSE );
}
