请教问题：点精灵的渲染问题

ilvwen

我想画一组点精灵到屏幕上，奇怪的是只显示了第一个point，别的都不显示，部分代码如下：

struct PointVertex
{
        D3DXVECTOR3 pos;
        D3DCOLOR color;
        static const DWORD FVF;
};
const DWORD PointVertex::FVF = D3DFVF_XYZ| D3DFVF_DIFFUSE;
struct Particle
{
        D3DXVECTOR3 m_vCurPos;
        D3DCOLOR m_dwColor;
//other attirbute omit..
};
        hr = pd3dDevice->CreateVertexBuffer(
                m_dwMaxParticles * sizeof(PointVertex),
        D3DUSAGE_DYNAMIC | D3DUSAGE_WRITEONLY | D3DUSAGE_POINTS,
        PointVertex::FVF,
        D3DPOOL_DEFAULT,
        &m_pVB, NULL );

        Particle *pParticle = m_pActiveList;
        PointVertex *pVertices;

        m_pVB->Lock(0,0,(void **)&pVertices,0);

        while(pParticle)
        {
                pVertices->pos = pParticle->m_vCurPos;
                pVertices->color = pParticle->m_dwColor;
                pParticle = pParticle->m_pNext;
        }
        m_pVB->Unlock();

        pd3dDevice->SetTexture(0, m_ptexParticle);
        pd3dDevice->SetFVF( PointVertex::FVF );
        pd3dDevice->SetStreamSource( 0, m_pVB, 0, sizeof(PointVertex) );
        pd3dDevice->DrawPrimitive( D3DPT_POINTLIST, 0,20);

ilvwen

啊，我太笨了，问题已经解决了，大家不用看我的烂代码了，呵呵，改为
while(pParticle)
{
pVertices->pos = pParticle->m_vCurPos;
pVertices->color = pParticle->m_dwColor;
pParticle = pParticle->m_pNext;
pVertices+=sizeof(PointVertex);
}

ilvwen

半夜脑子糊涂了，顶最后一次。。。
while(pParticle)
{
pVertices->pos = pParticle->m_vCurPos;
pVertices->color = pParticle->m_dwColor;
pParticle = pParticle->m_pNext;
pVertices＋＋;
}

ddrmsdos

点精灵就是只显示一面的效果吧？