Perspective Projection - Part 1 // OpenGL Tutorial #11

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In this video I'm going to explain and implement perspective projection in OpenGL. This transformation is core in making your 3D game actually look like it has a third dimension. It makes objects that are further away from the camera appear smaller while closer objects appear larger. This video is part one and deals mainly with the projection of the XY coordinates. In the next video we will handle the Z component and the aspect ratio.

Back face culling is explained in    • From Dot To Triangle  // OpenGL Tutor...  

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** Link to source: https://github.com/emeiri/ogldev/blob...
If you want to get the same version that was used in the video checkout the tag TUT_11_PERS_PROJ_1.

** OpenGL 4.6 specification: https://www.khronos.org/registry/Open...

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Timecodes:
0:00 Intro
2:14 The View Frustum
5:47 View onto the YZ plane
6:14 Projecting on the near clip plane
6:42 The field of view
8:27 Calculating the projected point (Y component)
10:37 Calculating the projected point (X component)
11:33 How to implement?
12:07 The projection Matrix
13:09 Perspective Division
14:43 Copying the Z into W
15:38 Start of code review
15:55 How I got the cube mesh
17:10 Handling face culling
18:32 Transformation matrices
20:02 Run without projection
20:20 Implement the perspective projection matrix
21:45 Run with projection
23:40 Conclusion

Feel free to comment below.

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Enjoy,

Etay Meiri

#opengl #ogldev #opengtutorials