OpenGL 3D Game Tutorial 11: Per-Pixel Lighting

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LWJGL tutorial series on how to create a 3D Java game with OpenGL!

This week we add per-pixel diffuse lighting to the game, making everything look that little bit more epic!


Common Problems:

- Make sure that you are calling bindAttributes() *before* glLinkProgram() in the ShaderProgram constructor. Also, check that you spelled the "in" variable names correctly in the "bindAttributes()" method in the StaticShader class.

-If your dragon seems to have lots of white and black patches then it could be one of 2 problems:

1. Your texture dimensions might not be powers of 2 (64x64, 128x128, 256x256 etc.)

2. If they are powers of 2 then try adding the following lines to the end of the loadTexture() method, just before returning the texture ID:
GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MAG_FILTER, GL11.GL_LINEAR);
GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MIN_FILTER, GL11.GL_LINEAR);
GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_WRAP_S, GL11.GL_REPEAT);
GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_WRAP_T, GL11.GL_REPEAT);


Stanford Dragon Model: https://www.dropbox.com/sh/gscenjij7ny3xz1/AADQ3u6Ve96PP3ajyJP81ETSa?dl=0
Source: Stanford University Computer Graphics Laboratory

Vector maths basics:
http://www.bbc.co.uk/bitesize/higher/maths/geometry/vectors/revision/1/

Dot product:
http://betterexplained.com/articles/vector-calculus-understanding-the-dot-product/


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End of video music- Kai Engel, "Waking Stars":


http://freemusicarchive.org/music/Kai_Engel/Evening_Colors/01_-_Waking_Stars



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