最后，在可编程图形硬件上，采取投影纹理映射技术将阴影纹理投射到场景中的相应表面。

Finally, the shadow texture is mapped to a corresponding surface in 3D scene by projective texture based on programmable graphics hardware.

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随着可编程图形硬件时代的到来，着色器替代了传统的固定渲染管线以实现更加逼真的图像效果。

With the era of programmable graphics hardware, shader replaces the traditional fixed rendering pipeline to achieve more realistic effects.

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通过有效利用图形硬件的图形处理单元(GPU)的运算能力和可编程性，将大量计算从CPU分离出来。

With the efficient use of computation capacity and programmability provided by graphics processing unit (GPU) of underlying graphics hardware, most of computation from CPU are isolated.

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