https://github.com/dmnsgn/glsl-constants

Common GLSL math constants (with 11 decimals) available both as ES modules strings and as GLSL files for use with glslify.
https://github.com/dmnsgn/glsl-constants

constants degrees gamma glsl golden-ratio phi pi radians tau

Last synced: 3 months ago
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Common GLSL math constants (with 11 decimals) available both as ES modules strings and as GLSL files for use with glslify.

• Host: GitHub
• URL: https://github.com/dmnsgn/glsl-constants
• Owner: dmnsgn
• License: mit
• Created: 2018-03-27T01:00:50.000Z (about 7 years ago)
• Default Branch: main
• Last Pushed: 2024-07-06T14:45:25.000Z (11 months ago)
• Last Synced: 2025-02-18T07:56:18.016Z (3 months ago)
• Topics: constants, degrees, gamma, glsl, golden-ratio, phi, pi, radians, tau
• Language: GLSL
• Homepage: https://dmnsgn.github.io/glsl-constants/
• Size: 43 KB
• Stars: 11
• Watchers: 3
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md
  • License: LICENSE.MD

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README

        
# glsl-constants

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Common GLSL math constants (with 11 decimals) available both as ES modules strings and as GLSL files for use with glslify.

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## Installation

```bash

npm install glsl-constants

```

## Usage

### ESM

```js

import * as glslConstants from "glsl-constants";

import * as glslRotate from "glsl-rotate";

const shader = /* glsl */ `

${glslConstants.GAMMA}

${glslConstants.RECIPROCAL_GAMMA}

${glslConstants.TAU}

${glslConstants.PI}

${glslConstants.HALF_PI}

${glslConstants.QUARTER_PI}

${glslConstants.RECIPROCAL_PI}

${glslConstants.RECIPROCAL_TAU}

${glslConstants.TO_RADIANS}

${glslConstants.TO_DEGREES}

// ...

vec3 toGamma(vec3 v) {

  return pow(v, vec3(RECIPROCAL_GAMMA));

}

${glslRotate.rotate}

void main() {

  vec2 p2d = vec2(1.0, 0.0);

  p2d = rotate(p2d, TAU);

  p2d = rotate(p2d, PI);

  p2d = rotate(p2d, HALF_PI);

  p2d = rotate(p2d, QUARTER_PI);

  p2d = rotate(p2d, PHI);

  p2d = rotate(p2d, RECIPROCAL_PI);

  p2d = rotate(p2d, RECIPROCAL_TAU);

  p2d = rotate(p2d, 90.0 * TO_RADIANS);

  // ...

  gl_FragColor.rgb = toGamma(color.rgb);

}

`;

```

### glslify

```glsl

#pragma glslify: GAMMA = require(glsl-constants/GAMMA)

#pragma glslify: TAU = require(glsl-constants/TAU)

#pragma glslify: PI = require(glsl-constants/PI)

#pragma glslify: HALF_PI = require(glsl-constants/HALF_PI)

#pragma glslify: QUARTER_PI = require(glsl-constants/QUARTER_PI)

#pragma glslify: PHI = require(glsl-constants/PHI)

#pragma glslify: RECIPROCAL_PI = require(glsl-constants/RECIPROCAL_PI)

#pragma glslify: RECIPROCAL_TAU = require(glsl-constants/RECIPROCAL_TAU)

#pragma glslify: TO_RADIANS = require(glsl-constants/TO_RADIANS)

#pragma glslify: TO_DEGREES = require(glsl-constants/TO_DEGREES)

// ...

vec3 toGamma(vec3 v) {

  return pow(v, vec3(RECIPROCAL_GAMMA));

}

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

void main() {

  vec2 p2d = vec2(1.0, 0.0);

  p2d = rotate(p2d, TAU);

  p2d = rotate(p2d, PI);

  p2d = rotate(p2d, HALF_PI);

  p2d = rotate(p2d, QUARTER_PI);

  p2d = rotate(p2d, PHI);

  p2d = rotate(p2d, RECIPROCAL_PI);

  p2d = rotate(p2d, RECIPROCAL_TAU);

  p2d = rotate(p2d, 90.0 * TO_RADIANS);

  // ...

  gl_FragColor.rgb = toGamma(color.rgb);

}

```

## License

MIT. See [license file](https://github.com/dmnsgn/glsl-constants/blob/main/LICENSE.md).