hurricanerix / sdl2_opengl3

SDL2/OpenGL 3.2 test app written in C.

SDL2 OpenGL3 Example

This project aims to be a simple example for using SDL2 and OpenGL 3.2. In addition it should also be useful for experimenting with shader development.

Installation

Install XCode & CLI tools.

Install Development Libraries for SDL2: http://www.libsdl.org/download-2.0.php

OSX

Ubuntu

sudo apt-get install freeglut3 build-essential libgl1-mesa-dev mesa-common-dev xorg-dev libudev-dev libts-dev libgl1-mesa-dev libglu1-mesa-dev libasound2-dev libpulse-dev libopenal-dev libogg-dev libvorbis-dev libaudiofile-dev libpng12-dev libfreetype6-dev libusb-dev libdbus-1-dev zlib1g-dev libdirectfb-dev

Get SDL2, make and install http://www.libsdl.org/hg.php

Exporting Objects from Blender

Add texture coords to object

1. Select your object.

2. 3D View toolbar -> Edit Mode -> Mesh -> Faces -> Triangulate Faces (Ctl T)

3. Outliner -> Object Data -> UV Maps -> Add

4. Outliner -> Texture -> Show material textures -> Tex

   1. Type = Image or Movie

   2. Mapping -> Coordinates = UV

   3. Image -> Open (test.bmp)

5. 3D View -> Edit Mode -> Edge Select

   1. (click where you want a seam)

   2. Mesh Tools -> UV Mapping -> Mark Seam

   3. (repeat as needed)

   4. Select all faces

6. UV/Image Editor

   1. Browse image to be linked -> test.bmp

   2. UVs -> Unwrap

7. File -> Export -> Standord (.ply)

Recomended Reading

3D Math Primer for Graphics and Game Development

OpenGL Shading Language

Credits

Original OpenGL 3 code

Original PLY code

PLY objects created using blender

Test pattern for texture mapping

Original BMP laoding code

Original surface local tangent code