Curtainsjs NPM

const curtains = new Curtains({ container: "canvas" });

const plane = new Plane(curtains, document.querySelector("#plane"));

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    Or you can use npm:

npm i curtainsjs

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    Load ES6 modules:

```javascript
import {Curtains, Plane} from 'curtainsjs';

const curtains = new Curtains({
    container: "canvas"
});

const plane = new Plane(curtains, document.querySelector("#plane"));

// etc

Note that if you are using React, you might want to try react-curtains, curtains.js official React package.

The library is split into classes modules. Most of them are used internally by the library but there are however a few classes meant to be used directly, exported in the src/index.mjs file.

<body>
    <!-- div that will hold our WebGL canvas -->
    <div id="canvas"></div>
    
    <!-- div used to create our plane -->
    <div class="plane">
    
        <!-- image that will be used as texture by our plane -->
        <img src="path/to/my-image.jpg" crossorigin="" />
    </div>
    
</body>

body {
    /* make the body fits our viewport */
    position: relative;
    width: 100%;
    height: 100vh;
    margin: 0;
    overflow: hidden;
}

#canvas {
    /* make the canvas wrapper fits the document */
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
}

.plane {
    /* define the size of your plane */
    width: 80%;
    height: 80vh;
    margin: 10vh auto;
}

.plane img {
    /* hide the img element */
    display: none;
}

import {Curtains, Plane} from 'curtainsjs';

window.addEventListener("load", () => {
    // set up our WebGL context and append the canvas to our wrapper
    const curtains = new Curtains({
        container: "canvas"
    });
    
    // get our plane element
    const planeElement = document.getElementsByClassName("plane")[0];
    
    // set our initial parameters (basic uniforms)
    const params = {
        vertexShaderID: "plane-vs", // our vertex shader ID
        fragmentShaderID: "plane-fs", // our fragment shader ID
        uniforms: {
            time: {
                name: "uTime", // uniform name that will be passed to our shaders
                type: "1f", // this means our uniform is a float
                value: 0,
            },
        },
    };
    
    // create our plane using our curtains object, the bound HTML element and the parameters
    const plane = new Plane(curtains, planeElement, params);
    
    plane.onRender(() => {
        // use the onRender method of our plane fired at each requestAnimationFrame call
        plane.uniforms.time.value++; // update our time uniform value
    });
    
});

<script id="plane-vs" type="x-shader/x-vertex">
    #ifdef GL_ES
    precision mediump float;
    #endif
    
    // those are the mandatory attributes that the lib sets
    attribute vec3 aVertexPosition;
    attribute vec2 aTextureCoord;
    
    // those are mandatory uniforms that the lib sets and that contain our model view and projection matrix
    uniform mat4 uMVMatrix;
    uniform mat4 uPMatrix;
    
    // our texture matrix that will handle image cover
    uniform mat4 uTextureMatrix0;
    
    // pass your vertex and texture coords to the fragment shader
    varying vec3 vVertexPosition;
    varying vec2 vTextureCoord;
    
    void main() {       
        gl_Position = uPMatrix * uMVMatrix * vec4(aVertexPosition, 1.0);
        
        // set the varyings
        // here we use our texture matrix to calculate the accurate texture coords
        vTextureCoord = (uTextureMatrix0 * vec4(aTextureCoord, 0.0, 1.0)).xy;
        vVertexPosition = aVertexPosition;
    }
</script>

<script id="plane-fs" type="x-shader/x-fragment">
    #ifdef GL_ES
    precision mediump float;
    #endif
    
    // get our varyings
    varying vec3 vVertexPosition;
    varying vec2 vTextureCoord;
    
    // the uniform we declared inside our javascript
    uniform float uTime;
    
    // our texture sampler (default name, to use a different name please refer to the documentation)
    uniform sampler2D uSampler0;
    
    void main() {
        // get our texture coords from our varying
        vec2 textureCoord = vTextureCoord;
        
        // displace our pixels along the X axis based on our time uniform
        // textures coords are ranging from 0.0 to 1.0 on both axis
        textureCoord.x += sin(textureCoord.y * 25.0) * cos(textureCoord.x * 25.0) * (cos(uTime / 50.0)) / 25.0;
        
        // map our texture with the texture matrix coords
        gl_FragColor = texture2D(uSampler0, textureCoord);
    }
</script>

Complete changelog starting from version 7.1.0

webgl

@infinitebrahmanuniverse/nolb-cur @everything-registry/sub-chunk-1427 @maray-ai/maertens vue-curtains react-curtains

7 days ago

10 months ago

2 years ago

3 years ago