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glsl-inject-defines
Advanced tools
Readme
Safely inject #define
statements into a shader source.
If the shader contains any #version
or #extension
statements, the defines are added after them.
// Your cool shader
#version 330
#extension GL_OES_standard_derivatives : enable
void main() {
#ifdef BLUE
gl_FragColor = vec4(0.0, 0.0, 1.0, 1.0);
#else
gl_FragColor = vec4(0.0);
#endif
}
You can process it at runtime, like so:
var injectDefines = require('glsl-inject-defines')
var fs = require('fs')
var source = fs.readFileSync(__dirname + '/shader.glsl', 'utf8')
var transformed = injectDefines(source, {
PI: 3.14,
BLUE: ''
})
console.log(transformed)
The resulting shader:
// Your cool shader
#version 330
#extension GL_OES_standard_derivatives : enable
#define PI 3.14
#define BLUE
void main() {
#ifdef BLUE
gl_FragColor = vec4(0.0, 0.0, 1.0, 1.0);
#else
gl_FragColor = vec4(0.0);
#endif
}
Works in the browser with browserify and glslify.
npm install glsl-inject-defines
newSource = injectDefines(source, defines)
Injects the set of defines
, an object with <name, value>
pairs that will get turned into strings for the shader source.
Returns the transformed source, with defines injected after extension and version statements.
MIT. See LICENSE.md for details.
FAQs
injects a #define statement into a shader source
We found that glsl-inject-defines demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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