[Episode 14] Drawing a colored triangle (using single vertex buffer object) - Modern OpenGL

►Lesson Description: In this lesson we'll revisit our previous lesson, but this time we will only use one vertex buffer object in order to add color into our scenes. Their are some pros and cons that would have to be empirically measured with having multiple buffers (anecdotally one buffer may perform better), so it is good to know both strategies, and understand also how our attribute pointers work in this lesson.

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[dennistu]

why does the API require a GLvoid* instead just a GLsizei for the offset like stride does?

[dankmemer]

One of the best openGL tutorial series yet. Gonna be big one day if you keep this up

[joshbrice]

😁 Mike is so fast, rapid progress, thank you !

[Zimbob]

What is the difference between GL_FLOAT and GLfloat, I realize GLfloat is a type but I don't fully understand the difference and why would they use something so close to the same. Thanks for the videos.

[matthewexline]

Sorry if this is a stupid question, but in the case where we're doing one solid VBO like this, then whenever we pass in the stride in glVertexAttribPointer(), the stride will always be the same for each attribute in our vertexArray, right? Seems to me like that must be the case.

[matthewexline]

Such a great video, thank you! I finally got it all working, but I am curious about disabling the vertex attribute arrays. I notice that we unbind our vertex array, then unbind disable the attributes, and then bind the vertexArray again. Or at least that's how it ended up in my code lol. What would be the purpose in doing this? I've gone ahead and commented out the unbind, disableAttribArray, re-bind code for now, and it seems to run fine. Not sure if it's like a memory issue or something?

[TechStore]

very nice you tech
glEnableVertexAttribArray(1);
glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, sizeof(GL_FLOAT) * 6,
important line to do thanks