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This question was closed Aug 14, 2019 at 07:04 AM by Silent_Tea for the following reason:

Problem is not reproducible or outdated

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Question by Silent_Tea · Jul 24, 2019 at 11:23 AM · shadershader programming

Select 4 points to form a parallelogram area within a plane and stretch that area into a rectangle area

Hi everyone,

I wonder if there is a method using Unity shader programming to stretch a parallelogram area within a plane to a rectangle area.

As stated in the picture, it is kind of like homography in computer vision. The left half of the image can be viewed as the texture I have on the plane. Parallelogram area is marked out by the yellow line. What I want to obtain is the area marked out by the yellow line in the right half of the image.

All I know are the transform and the texture of the plane, the width and the height of the rectangle are as well as the world positions of four points forming the parallelogram area

Thanks in advance for the help!

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homography-perspective-correction.jpg (48.8 kB)
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