Printing Text - OpenGL: Basic Coding - Khronos Forums.
GLFW just sets up the window and context, it doesn't have anything to do with drawing. To draw text with OpenGL, you can use a library like FreeType to generate textures for each character for you to render. There are plenty of tutorials that cover this topic, like this one.
Note: Implementations of OpenGL have leeway in selecting which C data type to use to represent OpenGL data types. If you resolutely use the OpenGL defined data types throughout your application, you will avoid mismatched types when porting your code between different implementations. Some OpenGL commands can take a final letter v, which indicates that the command takes a pointer to a vector.
You don’t have to know anything, but you have to forget everything you know about OpenGL. If you know about something that looks like glBegin(), forget it. Here you will learn modern OpenGL (OpenGL 3 and 4), and many online tutorials teach “old” OpenGL (OpenGL 1 and 2). So forget everything you might know before your brain melts from the.
Write some Software I would like a c program which has a space background and two planets in it (the planets have be .obj extension). One of the planets should be in the middle and the other one should go around it automatically as a moon of the other planet.
Texture Mapped Text. See Mark Kilgard's paper, A Simple OpenGL-based API for Texture Mapped Text.This is an exceptionally clever application of texture mapping, and it offers a good balance between performance, ability to apply 3D transforms, and compactness of implementation.
OpenGL 3 makes it easy to write complicated stuff, but at the expense that drawing a simple triangle is actually quite difficult. Don’t forget to cut’n paste the code on a regular basis. If the program crashes at startup, you’re probably running from the wrong directory.
To compile a text source file at runtime, you need to get the text from the file as a single string. After opening the file as an ifstream, we can use the input stream buffer iterator to read it in as one line. The standard string function assign() just gives the string a value. The first argument tells it to start reading the source file from.