Perspective Projection - Part 2 // OpenGL Tutorial #12

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This is the second part of the perspective projection tutorial. Here we will focus on the aspect ratio (non-square windows) and the transformation of the Z coordinate. This video also contains a short discussion on the Depth Test. Make sure to watch the first part on the transformation of the X and Y coordinates:    • Perspective Projection - Part 1 // Op...  

The entire series on OpenGL is available on:    • OpenGL for Beginners  

Please visit https://ogldev.org to see more of my tutorials on modern OpenGL.

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_12_PERS_PROJ_2.

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

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These are affiliate links so if you use them to buy the books the price is the same for you and I will get a small commision (thank-you!).

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Timecodes
0:00 Intro
1:08 Background on Aspect Ratio
2:28 Viewport Transform
3:00 Aspect Ratio mapping
4:27 Aspect Ratio code review
8:44 Z transformation
9:21 The Painter’s Algorithm
10:02 The Depth Test
12:03 Range of floating points
14:02 Transforming NearZ/FarZ to -1 and 1
16:24 Transfored Z chart
17:46 Z transform code review
20:11 Conclusion

Feel free to comment below.

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Credits:
Music: "Funny Song" from https://bensound.com
Image: View Frustum image: https://upload.wikimedia.org/wikipedi... (MithrandirMage, CC BY-SA 3.0 https://creativecommons.org/licenses/..., via Wikimedia Commons)
Painter's Algorithm image by Zapyon - https://en.wikipedia.org/wiki/Painter...

Enjoy,

Etay Meiri

#opengl #ogldev #opengtutorials