MSDN中的解释,记得有问题先查MSDN喽。很好的东西
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sincos - HLSL
Returns the sine and cosine of x. sin(x) is stored in the output parameter s. cos(x) is stored in the output parameter c.
Syntax
sincos(x, out s, out c)
Where:
Name In/Out Template Type Component Type Size
x in scalar, vector, or matrix float any
s out same as input x float same as input x
c out same as input x float same as input x