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CImage:Powa
The Powa method raises a number to powers specified by the image pixels.
bResult = CImage:Pow( power )
power specifies the exponent and may be a number or
string.
On success,
this method returns true.
On failure,
this method returns false.
This method has a possibility of an illegal operation if a negative number is raised to a non-integral power. Mira traps this condition and substitutes a replacement value into the output pixel. The replacement value is set for math operations using the SetMathErrVal method.
Suppose an image is displayed in a CImageView named V. The following script fragment raises 1.5 to powers specified by the image pixels:
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I = V:GetImage() |
-- attach the current displayed image |
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I:Powa( 1.5 ) |
-- perform the operation |
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V:Update() |
-- update the display after the shift |