D3D API - D3DTA_TEMP

D3D API - D3DTA_TEMP

作用：把颜色暂时写入别的地方，不更新到后台缓冲区

The texture argument is a temporary register color for read or write. D3DTA_TEMP is supported if the D3DPMISCCAPS_TSSARGTEMP device capability is present. The default value for the register is (0.0, 0.0, 0.0, 0.0). Permissions are read/write.

使用：

  g_pd3dDevice->SetTextureStageState(0, D3DTSS_COLOROP, D3DTOP_SELECTARG1);
  g_pd3dDevice->SetTextureStageState(0, D3DTSS_COLORARG1, D3DTA_DIFFUSE);
  g_pd3dDevice->SetTextureStageState(0, D3DTSS_RESULTARG, D3DTA_TEMP);
  g_pd3dDevice->SetTextureStageState(0, D3DTSS_ALPHAOP, D3DTOP_DISABLE);

  g_pd3dDevice->SetTextureStageState(1, D3DTSS_COLOROP, D3DTOP_MODULATE);
  g_pd3dDevice->SetTextureStageState(1, D3DTSS_COLORARG1, D3DTA_TEXTURE);
  g_pd3dDevice->SetTextureStageState(1, D3DTSS_COLORARG2, D3DTA_TEMP);
  g_pd3dDevice->SetTextureStageState(1, D3DTSS_TEXCOORDINDEX, 0);
  g_pd3dDevice->SetTextureStageState(1, D3DTSS_ALPHAOP, D3DTOP_DISABLE);