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CImage:PtInside
The PtInside method tests whether a point specified in pixel coordinates is interior to the image.
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bResult = CImage:PtInside( x, y ) |
x and y are image
coordinates in pixel units.
On success,
this method returns true.
On failure,
this method returns false.
This method is useful for the non-trivial cases of when a coordinate is calculated or is expressed in world coordinates. In the latter case, call WcsToXy to convert to pixel coordinates before calling this method.
Assume a displayed image is attached to a CImageView namedI. The following script fragment converts a coordinate (a,d) into pixel coordinates and then tests whether the point (x,y) is inside the image:
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I = V:GetImage() |
-- create a CRect object |
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x, y = I:XytoWcs(a,d) |
-- convert to pixel coordinates |
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test = I:PtInside(x,y) |
-- returns true if x,y is inside the image |
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Printf( "Inside=%d\n",test) |
-- result: Inside = 1 |