13 lines
No EOL
570 B
GLSL
13 lines
No EOL
570 B
GLSL
/*
|
|
contributors: Inigo Quiles
|
|
description: |
|
|
A nice choice to remap the 0..1 interval into 0..1, such that the corners are mapped to 0 and the center to 1. You can then rise the parabolar to a power k to control its shape. From https://iquilezles.org/articles/functions/
|
|
use: <float> parabola(<float> x, <float> k)
|
|
examples:
|
|
- https://raw.githubusercontent.com/patriciogonzalezvivo/lygia_examples/main/math_functions.frag
|
|
*/
|
|
|
|
#ifndef FNC_PARABOLA
|
|
#define FNC_PARABOLA
|
|
float parabola(const in float x, const in float k ) { return pow( 4.0*x*(1.0-x), k ); }
|
|
#endif |