An approximate representation, on a flat surface, of an image as it is seen by the eye.

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Correct way to calculate Perspective Matrix [duplicate]

I have seen at least 3 different ways to calculate the perspective matrix and I'm confused as to which one I should be using and what the differences are? OpenGL says to do it this way: f = ...
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perspective camera with libgdx

I am trying to setup a viewport using perspective camera. I am trying to render a scene like this I read an official blog post about the cameras and found a few tests within gdx test suits. ...
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How do I calculate the z-coordinate for a perspective-camera in 2D?

I'm new to LibGDX and trying to use DecalBatch with PerspectiveCamera, simply to have Z-coordinate for my sprites, as SpriteBatch does not offer that. However, I don't know how to calculate the ...
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How to fix OpenGL Co-ordinate System in SFML?

My OpenGL setup is somehow configured to work like so: (-1, 1) (0, 1) (1, 1) (-1, 0) (0, 0) (1, 0) (-1, -1) (0, -1) (1, -1) How do I configure it so that it works like so: (0, 0) (SW/2, 0) (SW, 0) ...
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How do I draw tile in a side-on perspective? [closed]

All the tutorials I've found regarding using tiles in game engines refer to games with an isometric or top-down view, much like this: I want to make a "beat em up"-game, where the view is tilted. ...