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Math behind Glu.UnProject

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Started by Zaphyk February 18, 2016 06:21 AM

0 comments, last by swiftcoder 8 years, 2 months ago

Zaphyk

292

Author

February 18, 2016 06:21 AM

Hello, Can someone explain me the math behind Glu.Unproject, just to know how it works and to get better in math for 3d games, Thanks

swiftcoder

18,997

February 18, 2016 06:58 AM

The man page has a pretty comprehensive breakdown of the math, but in layman's terms, it converts the input points for window space to clip space using the viewport bounds, and then multiplies the resulting point by the inverse of the (model * projection) matrix.

Tristam MacDonald. Ex-BigTech Software Engineer. Future farmer. [https://trist.am]