LogicEu / fract

Lightweight vector and matrix math library for game development

fract

Small math library for game and graphics written in C99. Fully compatible with OpenGL. Some of the features of the library are:

• Pseudo Random Number Generator
• 2D Perlin Noise
• Floating Point Vectors (2D, 3D, and 4D)
• 4x4 Matrix Operations (Projections, Rotations, etc...)
• Lerp, Smoothlerp, Sqrtfast, Clamp, etc...

Fract has a single header file fract.h that includes all declarations. The only dependency of fract is the standard math library, used mainly for trigonometry.

Example

#include <fract.h>

int main()
{
    int width = 800;
    int height = 600;

    float aspect = (float)width / (float)height;
    float near = 0.01F;
    float far = 1000.0F;
    float fov = deg2rad(45.0F);

    vec3 position = {0.0F, 0.0F, 0.0F};
    vec3 direction = {0.0F, 0.0F, 1.0F};
    vec3 up = {0.0F, 1.0F, 0.0F};

    mat4 projection = mat4_perspective(fov, aspect, near, far);
    mat4 view = mat4_look_at(position, direction, up);
    mat4 model = mat4_id();
    mat4 mvp = mat4_mult(projection, mat4_mult(view, model));

    /* ... */
    
    glUniformMatrix4fv(uniform, 1, GL_FALSE, &mvp.data[0][0]);

    /* ... */
}

Build

There are two build scripts in this repository, one is a Makefile and the other a shell script. You can compile the library with any of the two. Both of them currently work on Linux and MacOS.

make all -j # or ./build.sh all

There is a simple installation function that builds the library and puts it in the /usr/local directory:

sudo make install # or sudo ./build.sh install

Clean object files and binaries created during compilation in /tmp and /bin with:

make clean # or ./build.sh clean