d3d中能不能动态改变MultiSampleType?影响全屏抗锯齿效率的

hflong240

我在渲染某物体的时候发现设置的多采样越高帧率越低,而其他物体没有这种现象,所以能不能在渲染这个物体的时候改变MultiSampleType呢? 我试着用g_D3DDevice->SetRenderState(D3DRS_MULTISAMPLEANTIALIAS,FALSE);关闭抗锯齿,但是帧率只提高了一点点,而如果在创建设备时就设为D3DMULTISAMPLE_NONE;的话帧率就提高了很多. 这是什么原因呢?影响全屏抗锯齿效率的因素又有哪些呢?

oz01

注意显存和带宽
反锯齿就是放大渲染缓冲区

lidudu

D3DRS_MULTISAMPLEANTIALIAS
bool value that determines how individual samples are computed when using a multisample render-target buffer. When set to TRUE, the multiple samples are computed so that full-scene antialiasing is performed by sampling at different sample positions for each multiple sample.When set to FALSE, the multiple samples are all written with the same sample value, sampled at the pixel center, which allows non-antialiased rendering to a multisample buffer.

hflong240

我把D3DRS_MULTISAMPLEANTIALIAS设为FALSE帧率只提高了20-30,而创建设备时设为D3DMULTISAMPLE_NONE的话就提高了将近100,这是什么原因?

resplendence

3楼不是解释了么