D3D TriangleStripe 的绘制流程

迈不过友情╰ 2022-06-01 13:11 213阅读 0赞

int nVertextCount=8;//8个顶点
    	int nVertextTotal=nVertextCount*sizeof(D3DVertexXYZUV1);
    	LPDIRECT3DVERTEXBUFFER9 &pVertextBuffer=m_pVertextBuffer;
    	HRESULT hr=S_OK;
    	if (FAILED(
    		hr=pDevice3D->CreateVertexBuffer(
    		nVertextTotal,
    		0,
    		D3DVertexXYZUV1_FVF,
    		D3DPOOL_DEFAULT,
    		&pVertextBuffer,
    		NULL
    		)
    		))
    	{
    		return false;
    	}
    	PD3DVertexXYZUV1 pD3DVertexXYZUV1=NULL;
    	if (FAILED(
    		hr=pVertextBuffer->Lock(0,nVertextTotal,(void**)&pD3DVertexXYZUV1,0)
    		))
    	{
    		return false;
    	}
    	float nLength=500.0f;
    	float nLengthHard=nLength/2;
    	//前面4个顶点
    	pD3DVertexXYZUV1[0]=D3DVertexXYZUV1(-nLengthHard,0.0f,nLengthHard,0.0f,1.0f);//左下角
    	pD3DVertexXYZUV1[1]=D3DVertexXYZUV1(-nLengthHard,nLengthHard,nLengthHard,0.0f,0.0f);//左上角
    	pD3DVertexXYZUV1[2]=D3DVertexXYZUV1(nLengthHard,0.0f,nLengthHard,1.0f,1.0f);//右下角
    	pD3DVertexXYZUV1[3]=D3DVertexXYZUV1(nLengthHard,nLengthHard,nLengthHard,1.0f,0.0f);//右上角
    	//后面4个顶点
    	pD3DVertexXYZUV1[4]=D3DVertexXYZUV1(nLengthHard,0.0f,-nLengthHard,0.0f,1.0f);//左下角
    	pD3DVertexXYZUV1[5]=D3DVertexXYZUV1(nLengthHard,nLengthHard,-nLengthHard,0.0f,0.0f);//左上角
    	pD3DVertexXYZUV1[6]=D3DVertexXYZUV1(-nLengthHard,0.0f,-nLengthHard,1.0f,1.0f);//右下角
    	pD3DVertexXYZUV1[7]=D3DVertexXYZUV1(-nLengthHard,nLengthHard,-nLengthHard,1.0f,0.0f);//右下角
    	pVertextBuffer->Unlock();

上面是创建顶点缓存,下面开始绘制

pDevice->SetRenderState(D3DRS_CULLMODE,D3DCULL_NONE);
    
    	D3DXMATRIX matFloor;
    	D3DXMatrixTranslation(&matFloor, 0.0f, 0.0f, 0.0f);
    	DWORD nFillMode=0;
    	pDevice->GetRenderState(D3DRS_FILLMODE,&nFillMode);
    	pDevice->SetRenderState(D3DRS_FILLMODE,D3DFILL_WIREFRAME);
    	pDevice->SetTransform(D3DTS_WORLD, &matFloor);
    	//pDevice->SetTexture(0,m_pTexture);
    	pDevice->SetFVF(D3DVertexXYZUV1_FVF);
    	pDevice->SetStreamSource(0,m_pVertextBuffer,0,sizeof(D3DVertexXYZUV1));
    	pDevice->DrawPrimitive(D3DPT_TRIANGLESTRIP,0,5);

![SouthEast][]

[SouthEast]: /images/20220601/7b0ee09854a24f50ae42df3fb889e49e.png