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ApplyMatrix  projection matrices
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Hello 
I have a question about the ApplyMatrix command. When I build a 2x2 projection matrix the ApplyMatrix command appears to fail. What am I doing wrong?
I attached a very simple file to demonstrate the situation I'm struggling with.
Thanks!
Files:
ProjectionSampl...
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GG suppose c' is a conic but your matrix has determinant equal to 0. try with no singular matrix
Does writing the conic as a parametric curve help to get what you expect, with a transformation with det(Proj)=0 ?
or use a polygon for illustrating the transformation
Thank you all so much for your suggestions. I had figured the fact that the matrix was singular was the problem. To confirm  applying a singular matrix to a conic or region requires working around the ApplyMatrix command, correct?
Simona your file was very helpful; thank you.
Mathmagic you suggested I use a polygon, but when I similarly attempt to use ApplyMatrix with a projection matrix applied to a polygon I also get an incorrect result.
what matrix? what polygon?
if the matrix is singular the polygon is transformed in several segments.
when you hide the segments then the segments are not visible
move the sliders
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