索引顶点缓冲

IDirect3DVertexBuffer _VB;IDirect3DIndexBuffer _IB;CreateVeretxBuffer( 3 * sizeof(Vertex), 0, FVF(活动顶点格式),内在池, &_VB, 0)CreateIndexBuffer( 3*sizeof(Vertex), 0,D3DFMT_INDEX16,内存池,&_IB, 0)

当用索引顶点缓冲时,还要加锁

WORD *indices = 0;

_IB->Lock( 0, 0, (void **)&indices, 0);

.....

_IB->Unlock();

 

渲染时,

要加入Device->SetIndices(_IB);

 

渲染函数用Device->DrawIndexedPrimitive( D3DPT_TRIANGLELIST, 0, 0, 4, 0, 2)

第一个参数为图元格式, 0, 0, 顶点个数, 0, 绘制图元个数.

 

 

绘制三角形时:

必须三个顶点放一起,系统会把三个顶点放在一起绘制三角形,三个顶点的顺序必须为顺时针.