OpenGL 3D Game Tutorial 5: Coloring using Shaders

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ThinMatrix

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Published on August 16, 2014 5:30:02 PM ● Video Link: https://www.youtube.com/watch?v=4w7lNF8dnYw

Game:

The Elder Scrolls Online (2014)

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Tutorial

Duration: 14:56

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

We put our knowledge of opengl shaders to use in this episode and create a shader program to color our quad.

Full code download (only use if you get stuck! You'd have no chance of understanding later tutorials if you skip this one!):
https://www.dropbox.com/sh/qtfhwru70y9sg8b/AAAweVar09wgu9DmmSO8yAf8a?dl=0

LWJGL Wiki: http://lwjgl.org/wiki/index.php?title=Main_Page

LWJGL Download: http://lwjgl.org/download.php

Slick-Utils Download: http://slick.ninjacave.com/slick-util/


Common Mistakes:

-If you get a large access violation error then check that you aren't trying to initialize your shader before you've created the display. Creating the display MUST happen before you do anything else OpenGL related.

-Make sure that your "out" variable in the vertex shader has the EXACT same name as the "in" variable in the fragment shader.

-If you get the following error: "'gl_Position' : undeclared identifier"
then check that you didn't load up the vertex shader code twice in the StaticShader. This error usually occurs when you load up and compile vertex shader code as a fragment shader.

-Make sure that in the MainGameLoop you render the quad AFTER starting the shader program but BEFORE stopping it. The shader program needs to be running when you render!

-In the ShaderProgram constructor make sure you're calling glAttachShader() for both the vertex shader and the fragment shader.


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