glslify / glsl-inverse

Invert a matrix in GLSL

glsl-inverse

Invert a matrix in GLSL.

Example

#pragma glslify: inverse = require(glsl-inverse)

void main() {
  mat3 m = mat3(1, 2, -3,
                4, 0, 6,
                7.1, 8, 9);

  mat3 mi = inverse(m);

  //now mi is the inverse of m
}

Usage

Install with npm:

npm install glsl-inverse

Then use with glslify.

API

#pragma glslify: inverse = require(glsl-inverse)

mi = inverse(float|mat2|mat3|mat4 m)

Computes inverse of m

• m is a matrix to invert, either float, mat2, mat3 or mat4

Returns The inverse of m

License

(c) 2014 Mikola Lysenko. MIT License

glsl-inverse's Issues

2x3 matrix inversion

please consider adding 2x3 matrix inversion
this is cheaper version of 3x3 for case when last row is 0,0,1
useful for 2d transformations

mat3 inverse2x3(mat3 m){ float a=m[0][0], b=m[0][1], c=m[0][2], d=m[1][0], e=m[1][1], f=m[1][2], t=a*e-b*d; return mat3(e/t, -b/t, (f*b-c*e)/t, -d/t, a/t, (-f*a+c*d)/t, 0, 0, 1); }