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<title>twgl/attributes - Documentation</title>
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<li class="nav-link nav-home-link"><a href="index.html">Home</a></li><li class="nav-heading">Modules</li><li class="nav-heading"><span class="nav-item-type type-module">M</span><span class="nav-item-name"><a href="module-twgl.html">twgl</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.addExtensionsToContext">addExtensionsToContext</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.bindFramebufferInfo">bindFramebufferInfo</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.bindTransformFeedbackInfo">bindTransformFeedbackInfo</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.bindUniformBlock">bindUniformBlock</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.createBufferInfoFromArrays">createBufferInfoFromArrays</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.createFramebufferInfo">createFramebufferInfo</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.createProgramInfo">createProgramInfo</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.createTexture">createTexture</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.createTextures">createTextures</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.createTransformFeedback">createTransformFeedback</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.createTransformFeedbackInfo">createTransformFeedbackInfo</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.createUniformBlockInfo">createUniformBlockInfo</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.drawBufferInfo">drawBufferInfo</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.drawObjectList">drawObjectList</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.getContext">getContext</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.glEnumToString">glEnumToString</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.isWebGL1">isWebGL1</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.isWebGL2">isWebGL2</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.resizeCanvasToDisplaySize">resizeCanvasToDisplaySize</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.resizeFramebufferInfo">resizeFramebufferInfo</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.resizeTexture">resizeTexture</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.setAttribInfoBufferFromArray">setAttribInfoBufferFromArray</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.setBlockUniforms">setBlockUniforms</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.setBuffersAndAttributes">setBuffersAndAttributes</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.setDefaults">setDefaults</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.setTextureFromArray">setTextureFromArray</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.setUniformBlock">setUniformBlock</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.setUniforms">setUniforms</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#~createContext">createContext</a></span></li><li class="nav-heading"><span class="nav-item-type type-module">M</span><span class="nav-item-name"><a href="module-twgl_attributes.html">twgl/attributes</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_attributes.html#.createAttribsFromArrays">createAttribsFromArrays</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_attributes.html#.createBufferFromArray">createBufferFromArray</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_attributes.html#.createBufferFromTypedArray">createBufferFromTypedArray</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_attributes.html#.createBufferInfoFromArrays">createBufferInfoFromArrays</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_attributes.html#.createBuffersFromArrays">createBuffersFromArrays</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_attributes.html#.setAttribInfoBufferFromArray">setAttribInfoBufferFromArray</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_attributes.html#.setAttributePrefix">setAttributePrefix</a></span></li><li class="nav-heading"><span class="nav-item-type type-module">M</span><span class="nav-item-name"><a href="module-twgl_draw.html">twgl/draw</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_draw.html#.drawBufferInfo">drawBufferInfo</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_draw.html#.drawObjectList">drawObjectList</a></span></li><li class="nav-heading"><span class="nav-item-type type-module">M</span><span class="nav-item-name"><a href="module-twgl_framebuffers.html">twgl/framebuffers</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_framebuffers.html#.bindFramebufferInfo">bindFramebufferInfo</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_framebuffers.html#.createFramebufferInfo">createFramebufferInfo</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_framebuffers.html#.resizeFramebufferInfo">resizeFramebufferInfo</a></span></li><li class="nav-heading"><span class="nav-item-type type-module">M</span><span class="nav-item-name"><a href="module-twgl_m4.html">twgl/m4</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.axisRotate">axisRotate</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.axisRotation">axisRotation</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.copy">copy</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.create">create</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.frustum">frustum</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.getAxis">getAxis</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.getTranslation">getTranslation</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.identity">identity</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.inverse">inverse</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.lookAt">lookAt</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.multiply">multiply</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.negate">negate</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.ortho">ortho</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.perspective">perspective</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.rotateX">rotateX</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.rotateY">rotateY</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.rotateZ">rotateZ</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.rotationX">rotationX</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.rotationY">rotationY</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.rotationZ">rotationZ</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.scale">scale</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.scaling">scaling</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.setAxis">setAxis</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.setDefaultType">setDefaultType</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.setTranslation">setTranslation</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.transformDirection">transformDirection</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.transformNormal">transformNormal</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.transformPoint">transformPoint</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.translate">translate</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.translation">translation</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.transpose">transpose</a></span></li><li class="nav-heading"><span class="nav-item-type type-module">M</span><span class="nav-item-name"><a href="module-twgl_primitives.html">twgl/primitives</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.concatVertices">concatVertices</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.create3DFBufferInfo">create3DFBufferInfo</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.create3DFBuffers">create3DFBuffers</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.create3DFVertices">create3DFVertices</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.createAugmentedTypedArray">createAugmentedTypedArray</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.createCrescentBufferInfo">createCrescentBufferInfo</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.createCrescentBuffers">createCrescentBuffers</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.createCrescentVertices">createCrescentVertices</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.createCresentBufferInfo">createCresentBufferInfo</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.createCresentBuffers">createCresentBuffers</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.createCresentBuffers">createCresentBuffers</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.createCubeBufferInfo">createCubeBufferInfo</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.createCubeBuffers">createCubeBuffers</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.createCubeVertices">createCubeVertices</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.createCylinderBufferInfo">createCylinderBufferInfo</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.createCylinderBuffers">createCylinderBuffers</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.createCylinderVertices">createCylinderVertices</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.createDiscBufferInfo">createDiscBufferInfo</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.createDiscBuffers">createDiscBuffers</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.createDiscVertices">createDiscVertices</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.createPlaneBufferInfo">createPlaneBufferInfo</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.createPlaneBuffers">createPlaneBuffers</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.createPlaneVertices">createPlaneVertices</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.createSphereBufferInfo">createSphereBufferInfo</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.createSphereBuffers">createSphereBuffers</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.createSphereVertices">createSphereVertices</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.createTorusBufferInfo">createTorusBufferInfo</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.createTorusBuffers">createTorusBuffers</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.createTorusVertices">createTorusVertices</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.createTruncatedConeBufferInfo">createTruncatedConeBufferInfo</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.createTruncatedConeBuffers">createTruncatedConeBuffers</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.createTruncatedConeVertices">createTruncatedConeVertices</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.createXYQuadBufferInfo">createXYQuadBufferInfo</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.createXYQuadBuffers">createXYQuadBuffers</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.createXYQuadVertices">createXYQuadVertices</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.deindexVertices">deindexVertices</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.duplicateVertices">duplicateVertices</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.flattenNormals">flattenNormals</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.makeRandomVertexColors">makeRandomVertexColors</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.reorientDirections">reorientDirections</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.reorientNormals">reorientNormals</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.reorientPositions">reorientPositions</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.reorientVertices">reorientVertices</a></span></li><li class="nav-heading"><span class="nav-item-type type-module">M</span><span class="nav-item-name"><a href="module-twgl_programs.html">twgl/programs</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_programs.html#.bindUniformBlock">bindUniformBlock</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_programs.html#.createAttributeSetters">createAttributeSetters</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_programs.html#.createProgram">createProgram</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_programs.html#.createProgramAsync">createProgramAsync</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_programs.html#.createProgramFromScripts">createProgramFromScripts</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_programs.html#.createProgramFromSources">createProgramFromSources</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a 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</nav>
<div id="main">
<h1 class="page-title">twgl/attributes</h1>
<section>
<header>
</header>
<article>
<div class="container-overview">
<div class="description"><p>Low level attribute and buffer related functions</p>
<p>You should generally not need to use these functions. They are provided<br>
for those cases where you're doing something out of the ordinary<br>
and you need lower level access.</p>
<p>For backward compatibility they are available at both <code>twgl.attributes</code> and <code>twgl</code><br>
itself</p>
<p>See <a href="module-twgl.html"><code>module:twgl</code></a> for core functions</p></div>
<div class="section-method">
<dl class="details">
</dl>
</div>
</div>
<h3 class="subsection-title">Methods</h3>
<div class="section-method">
<h4 class="name" id=".createAttribsFromArrays"><span class="type-signature">(static) </span>createAttribsFromArrays<span class="signature">(gl, arrays, srcBufferInfo<span class="signature-attributes">opt</span>)</span><span class="type-signature"> &rarr; {Object.&lt;string, <a href="module-twgl.html#.AttribInfo">module:twgl.AttribInfo</a>>}</span></h4>
<div class="description">
<p>Creates a set of attribute data and WebGLBuffers from set of arrays</p>
<p>Given</p>
<pre><code> var arrays = {
position: { numComponents: 3, data: [0, 0, 0, 10, 0, 0, 0, 10, 0, 10, 10, 0], },
texcoord: { numComponents: 2, data: [0, 0, 0, 1, 1, 0, 1, 1], },
normal: { numComponents: 3, data: [0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1], },
color: { numComponents: 4, data: [255, 255, 255, 255, 255, 0, 0, 255, 0, 0, 255, 255], type: Uint8Array, },
indices: { numComponents: 3, data: [0, 1, 2, 1, 2, 3], },
};
</code></pre>
<p>returns something like</p>
<pre><code> var attribs = {
position: { numComponents: 3, type: gl.FLOAT, normalize: false, buffer: WebGLBuffer, },
texcoord: { numComponents: 2, type: gl.FLOAT, normalize: false, buffer: WebGLBuffer, },
normal: { numComponents: 3, type: gl.FLOAT, normalize: false, buffer: WebGLBuffer, },
color: { numComponents: 4, type: gl.UNSIGNED_BYTE, normalize: true, buffer: WebGLBuffer, },
};
</code></pre>
<p>notes:</p>
<ul>
<li>
<p>Arrays can take various forms</p>
<p>Bare JavaScript Arrays</p>
<pre><code>var arrays = {
position: [-1, 1, 0],
normal: [0, 1, 0],
...
}
</code></pre>
<p>Bare TypedArrays</p>
<pre><code>var arrays = {
position: new Float32Array([-1, 1, 0]),
color: new Uint8Array([255, 128, 64, 255]),
...
}
</code></pre>
</li>
<li>
<p>Will guess at <code>numComponents</code> if not specified based on name.</p>
<p>If <code>coord</code> is in the name assumes <code>numComponents = 2</code></p>
<p>If <code>color</code> is in the name assumes <code>numComponents = 4</code></p>
<p>otherwise assumes <code>numComponents = 3</code></p>
</li>
</ul>
</div>
<dl class="details">
</dl>
<h5>Parameters:</h5>
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th>Attributes</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>gl</code></td>
<td class="type">
<span class="param-type"><code>WebGLRenderingContext</code></span>
</td>
<td class="attributes">
</td>
<td class="description last">
<p>The webgl rendering context.</p>
</td>
</tr>
<tr>
<td class="name"><code>arrays</code></td>
<td class="type">
<span class="param-type"><code><a href="module-twgl.html#.Arrays">module:twgl.Arrays</a></code></span>
</td>
<td class="attributes">
</td>
<td class="description last">
<p>The arrays</p>
</td>
</tr>
<tr>
<td class="name"><code>srcBufferInfo</code></td>
<td class="type">
<span class="param-type"><code><a href="module-twgl.html#.BufferInfo">module:twgl.BufferInfo</a></code></span>
</td>
<td class="attributes">
&lt;optional><br>
</td>
<td class="description last">
<p>a BufferInfo to copy from<br>
This lets you share buffers. Any arrays you supply will override<br>
the buffers from srcBufferInfo.</p>
</td>
</tr>
</tbody>
</table>
<div class="section-returns">
<h5>Returns:</h5>
<dl class="param-type">
<dt>
Type:
</dt>
<dd>
<span class="param-type"><code>Object.&lt;string, <a href="module-twgl.html#.AttribInfo">module:twgl.AttribInfo</a>></code></span>
</dd>
</dl>
<div class="param-desc">
<p>the attribs</p>
</div>
</div>
</div>
<div class="section-method">
<h4 class="name" id=".createBufferFromArray"><span class="type-signature">(static) </span>createBufferFromArray<span class="signature">(gl, array, arrayName)</span><span class="type-signature"> &rarr; {WebGLBuffer}</span></h4>
<div class="description">
<p>Creates a buffer from an array, typed array, or array spec</p>
<p>Given something like this</p>
<pre><code>[1, 2, 3],
</code></pre>
<p>or</p>
<pre><code>new Uint16Array([1,2,3]);
</code></pre>
<p>or</p>
<pre><code>{
data: [1, 2, 3],
type: Uint8Array,
}
</code></pre>
<p>returns a WebGLBuffer that contains the given data.</p>
</div>
<dl class="details">
</dl>
<h5>Parameters:</h5>
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>gl</code></td>
<td class="type">
<span class="param-type"><code>WebGLRenderingContext</code></span>
</td>
<td class="description last">
<p>A WebGLRenderingContext.</p>
</td>
</tr>
<tr>
<td class="name"><code>array</code></td>
<td class="type">
<span class="param-type"><code><a href="module-twgl.html#.ArraySpec">module:twgl.ArraySpec</a></code></span>
</td>
<td class="description last">
<p>an array, typed array, or array spec.</p>
</td>
</tr>
<tr>
<td class="name"><code>arrayName</code></td>
<td class="type">
<span class="param-type"><code>string</code></span>
</td>
<td class="description last">
<p>name of array. Used to guess the type if type can not be derived otherwise.</p>
</td>
</tr>
</tbody>
</table>
<div class="section-returns">
<h5>Returns:</h5>
<dl class="param-type">
<dt>
Type:
</dt>
<dd>
<span class="param-type"><code>WebGLBuffer</code></span>
</dd>
</dl>
<div class="param-desc">
<p>a WebGLBuffer containing the data in array.</p>
</div>
</div>
</div>
<div class="section-method">
<h4 class="name" id=".createBufferFromTypedArray"><span class="type-signature">(static) </span>createBufferFromTypedArray<span class="signature">(gl, typedArray, type<span class="signature-attributes">opt</span>, drawType<span class="signature-attributes">opt</span>)</span><span class="type-signature"> &rarr; {WebGLBuffer}</span></h4>
<div class="description">
<p>Given typed array creates a WebGLBuffer and copies the typed array<br>
into it.</p>
</div>
<dl class="details">
</dl>
<h5>Parameters:</h5>
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th>Attributes</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>gl</code></td>
<td class="type">
<span class="param-type"><code>WebGLRenderingContext</code></span>
</td>
<td class="attributes">
</td>
<td class="description last">
<p>A WebGLRenderingContext</p>
</td>
</tr>
<tr>
<td class="name"><code>typedArray</code></td>
<td class="type">
<span class="param-type"><code>ArrayBuffer</code></span>
|
<span class="param-type"><code>SharedArrayBuffer</code></span>
|
<span class="param-type"><code>ArrayBufferView</code></span>
|
<span class="param-type"><code>WebGLBuffer</code></span>
</td>
<td class="attributes">
</td>
<td class="description last">
<p>the typed array. Note: If a WebGLBuffer is passed in it will just be returned. No action will be taken</p>
</td>
</tr>
<tr>
<td class="name"><code>type</code></td>
<td class="type">
<span class="param-type"><code>number</code></span>
</td>
<td class="attributes">
&lt;optional><br>
</td>
<td class="description last">
<p>the GL bind type for the buffer. Default = <code>gl.ARRAY_BUFFER</code>.</p>
</td>
</tr>
<tr>
<td class="name"><code>drawType</code></td>
<td class="type">
<span class="param-type"><code>number</code></span>
</td>
<td class="attributes">
&lt;optional><br>
</td>
<td class="description last">
<p>the GL draw type for the buffer. Default = 'gl.STATIC_DRAW`.</p>
</td>
</tr>
</tbody>
</table>
<div class="section-returns">
<h5>Returns:</h5>
<dl class="param-type">
<dt>
Type:
</dt>
<dd>
<span class="param-type"><code>WebGLBuffer</code></span>
</dd>
</dl>
<div class="param-desc">
<p>the created WebGLBuffer</p>
</div>
</div>
</div>
<div class="section-method">
<h4 class="name" id=".createBufferInfoFromArrays"><span class="type-signature">(static) </span>createBufferInfoFromArrays<span class="signature">(gl, arrays, srcBufferInfo<span class="signature-attributes">opt</span>)</span><span class="type-signature"> &rarr; {<a href="module-twgl.html#.BufferInfo">module:twgl.BufferInfo</a>}</span></h4>
<div class="description">
<p>Creates a BufferInfo from an object of arrays.</p>
<p>This can be passed to <a href="module-twgl.html#.setBuffersAndAttributes"><code>module:twgl.setBuffersAndAttributes</code></a> and to<br>
<code>module:twgl:drawBufferInfo</code>.</p>
<p>Given an object like</p>
<pre><code>var arrays = {
position: { numComponents: 3, data: [0, 0, 0, 10, 0, 0, 0, 10, 0, 10, 10, 0], },
texcoord: { numComponents: 2, data: [0, 0, 0, 1, 1, 0, 1, 1], },
normal: { numComponents: 3, data: [0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1], },
indices: { numComponents: 3, data: [0, 1, 2, 1, 2, 3], },
};
</code></pre>
<p>Creates an BufferInfo like this</p>
<pre><code>bufferInfo = {
numElements: 4, // or whatever the number of elements is
indices: WebGLBuffer, // this property will not exist if there are no indices
attribs: {
position: { buffer: WebGLBuffer, numComponents: 3, },
normal: { buffer: WebGLBuffer, numComponents: 3, },
texcoord: { buffer: WebGLBuffer, numComponents: 2, },
},
};
</code></pre>
<p>The properties of arrays can be JavaScript arrays in which case the number of components<br>
will be guessed.</p>
<pre><code>var arrays = {
position: [0, 0, 0, 10, 0, 0, 0, 10, 0, 10, 10, 0],
texcoord: [0, 0, 0, 1, 1, 0, 1, 1],
normal: [0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1],
indices: [0, 1, 2, 1, 2, 3],
};
</code></pre>
<p>They can also be TypedArrays</p>
<pre><code>var arrays = {
position: new Float32Array([0, 0, 0, 10, 0, 0, 0, 10, 0, 10, 10, 0]),
texcoord: new Float32Array([0, 0, 0, 1, 1, 0, 1, 1]),
normal: new Float32Array([0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1]),
indices: new Uint16Array([0, 1, 2, 1, 2, 3]),
};
</code></pre>
<p>Or AugmentedTypedArrays</p>
<pre><code>var positions = createAugmentedTypedArray(3, 4);
var texcoords = createAugmentedTypedArray(2, 4);
var normals = createAugmentedTypedArray(3, 4);
var indices = createAugmentedTypedArray(3, 2, Uint16Array);
positions.push([0, 0, 0, 10, 0, 0, 0, 10, 0, 10, 10, 0]);
texcoords.push([0, 0, 0, 1, 1, 0, 1, 1]);
normals.push([0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1]);
indices.push([0, 1, 2, 1, 2, 3]);
var arrays = {
position: positions,
texcoord: texcoords,
normal: normals,
indices: indices,
};
</code></pre>
<p>For the last example it is equivalent to</p>
<pre><code>var bufferInfo = {
attribs: {
position: { numComponents: 3, buffer: gl.createBuffer(), },
texcoord: { numComponents: 2, buffer: gl.createBuffer(), },
normal: { numComponents: 3, buffer: gl.createBuffer(), },
},
indices: gl.createBuffer(),
numElements: 6,
};
gl.bindBuffer(gl.ARRAY_BUFFER, bufferInfo.attribs.position.buffer);
gl.bufferData(gl.ARRAY_BUFFER, arrays.position, gl.STATIC_DRAW);
gl.bindBuffer(gl.ARRAY_BUFFER, bufferInfo.attribs.texcoord.buffer);
gl.bufferData(gl.ARRAY_BUFFER, arrays.texcoord, gl.STATIC_DRAW);
gl.bindBuffer(gl.ARRAY_BUFFER, bufferInfo.attribs.normal.buffer);
gl.bufferData(gl.ARRAY_BUFFER, arrays.normal, gl.STATIC_DRAW);
gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, bufferInfo.indices);
gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, arrays.indices, gl.STATIC_DRAW);</code></pre>
</div>
<dl class="details">
</dl>
<h5>Parameters:</h5>
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th>Attributes</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>gl</code></td>
<td class="type">
<span class="param-type"><code>WebGLRenderingContext</code></span>
</td>
<td class="attributes">
</td>
<td class="description last">
<p>A WebGLRenderingContext</p>
</td>
</tr>
<tr>
<td class="name"><code>arrays</code></td>
<td class="type">
<span class="param-type"><code><a href="module-twgl.html#.Arrays">module:twgl.Arrays</a></code></span>
</td>
<td class="attributes">
</td>
<td class="description last">
<p>Your data</p>
</td>
</tr>
<tr>
<td class="name"><code>srcBufferInfo</code></td>
<td class="type">
<span class="param-type"><code><a href="module-twgl.html#.BufferInfo">module:twgl.BufferInfo</a></code></span>
</td>
<td class="attributes">
&lt;optional><br>
</td>
<td class="description last">
<p>An existing<br>
buffer info to start from. WebGLBuffers etc specified<br>
in the srcBufferInfo will be used in a new BufferInfo<br>
with any arrays specified overriding the ones in<br>
srcBufferInfo.</p>
</td>
</tr>
</tbody>
</table>
<div class="section-returns">
<h5>Returns:</h5>
<dl class="param-type">
<dt>
Type:
</dt>
<dd>
<span class="param-type"><code><a href="module-twgl.html#.BufferInfo">module:twgl.BufferInfo</a></code></span>
</dd>
</dl>
<div class="param-desc">
<p>A BufferInfo</p>
</div>
</div>
</div>
<div class="section-method">
<h4 class="name" id=".createBuffersFromArrays"><span class="type-signature">(static) </span>createBuffersFromArrays<span class="signature">(gl, arrays)</span><span class="type-signature"> &rarr; {Object.&lt;string, WebGLBuffer>}</span></h4>
<div class="description">
<p>Creates buffers from arrays or typed arrays</p>
<p>Given something like this</p>
<pre><code>var arrays = {
positions: [1, 2, 3],
normals: [0, 0, 1],
}
</code></pre>
<p>returns something like</p>
<pre><code>buffers = {
positions: WebGLBuffer,
normals: WebGLBuffer,
}
</code></pre>
<p>If the buffer is named 'indices' it will be made an ELEMENT_ARRAY_BUFFER.</p>
</div>
<dl class="details">
</dl>
<h5>Parameters:</h5>
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>gl</code></td>
<td class="type">
<span class="param-type"><code>WebGLRenderingContext</code></span>
</td>
<td class="description last">
<p>A WebGLRenderingContext.</p>
</td>
</tr>
<tr>
<td class="name"><code>arrays</code></td>
<td class="type">
<span class="param-type"><code><a href="module-twgl.html#.Arrays">module:twgl.Arrays</a></code></span>
</td>
<td class="description last">
</td>
</tr>
</tbody>
</table>
<div class="section-returns">
<h5>Returns:</h5>
<dl class="param-type">
<dt>
Type:
</dt>
<dd>
<span class="param-type"><code>Object.&lt;string, WebGLBuffer></code></span>
</dd>
</dl>
<div class="param-desc">
<p>returns an object with one WebGLBuffer per array</p>
</div>
</div>
</div>
<div class="section-method">
<h4 class="name" id=".setAttribInfoBufferFromArray"><span class="type-signature">(static) </span>setAttribInfoBufferFromArray<span class="signature">(gl, attribInfo, array, offset<span class="signature-attributes">opt</span>)</span><span class="type-signature"></span></h4>
<div class="description">
<p>Sets the contents of a buffer attached to an attribInfo</p>
<p>This is helper function to dynamically update a buffer.</p>
<p>Let's say you make a bufferInfo</p>
<pre><code>var arrays = {
position: new Float32Array([0, 0, 0, 10, 0, 0, 0, 10, 0, 10, 10, 0]),
texcoord: new Float32Array([0, 0, 0, 1, 1, 0, 1, 1]),
normal: new Float32Array([0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1]),
indices: new Uint16Array([0, 1, 2, 1, 2, 3]),
};
var bufferInfo = twgl.createBufferInfoFromArrays(gl, arrays);
</code></pre>
<p>And you want to dynamically update the positions. You could do this</p>
<pre><code>// assuming arrays.position has already been updated with new data.
twgl.setAttribInfoBufferFromArray(gl, bufferInfo.attribs.position, arrays.position);</code></pre>
</div>
<dl class="details">
</dl>
<h5>Parameters:</h5>
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th>Attributes</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>gl</code></td>
<td class="type">
<span class="param-type"><code>WebGLRenderingContext</code></span>
</td>
<td class="attributes">
</td>
<td class="description last">
</td>
</tr>
<tr>
<td class="name"><code>attribInfo</code></td>
<td class="type">
<span class="param-type"><code>AttribInfo</code></span>
</td>
<td class="attributes">
</td>
<td class="description last">
<p>The attribInfo who's buffer contents to set. NOTE: If you have an attribute prefix<br>
the name of the attribute will include the prefix.</p>
</td>
</tr>
<tr>
<td class="name"><code>array</code></td>
<td class="type">
<span class="param-type"><code>ArraySpec</code></span>
</td>
<td class="attributes">
</td>
<td class="description last">
<p>Note: it is arguably inefficient to pass in anything but a typed array because anything<br>
else will have to be converted to a typed array before it can be used by WebGL. During init time that<br>
inefficiency is usually not important but if you're updating data dynamically best to be efficient.</p>
</td>
</tr>
<tr>
<td class="name"><code>offset</code></td>
<td class="type">
<span class="param-type"><code>number</code></span>
</td>
<td class="attributes">
&lt;optional><br>
</td>
<td class="description last">
<p>an optional offset into the buffer. This is only an offset into the WebGL buffer<br>
not the array. To pass in an offset into the array itself use a typed array and create an <code>ArrayBufferView</code><br>
for the portion of the array you want to use.</p>
<pre><code> var someArray = new Float32Array(1000); // an array with 1000 floats
var someSubArray = new Float32Array(someArray.buffer, offsetInBytes, sizeInUnits); // a view into someArray
</code></pre>
<p>Now you can pass <code>someSubArray</code> into setAttribInfoBufferFromArray`</p>
</td>
</tr>
</tbody>
</table>
</div>
<div class="section-method">
<h4 class="name" id=".setAttributePrefix"><span class="type-signature">(static) </span>setAttributePrefix<span class="signature">(prefix)</span><span class="type-signature"></span></h4>
<div class="description">
<p>Sets the default attrib prefix</p>
<p>When writing shaders I prefer to name attributes with <code>a_</code>, uniforms with <code>u_</code> and varyings with <code>v_</code><br>
as it makes it clear where they came from. But, when building geometry I prefer using un-prefixed names.</p>
<p>In other words I'll create arrays of geometry like this</p>
<pre><code>var arrays = {
position: ...
normal: ...
texcoord: ...
};
</code></pre>
<p>But need those mapped to attributes and my attributes start with <code>a_</code>.</p>
</div>
<dl class="details">
<dt class="important tag-deprecated">Deprecated:</dt><dd><ul class="dummy"><li>see <a href="module-twgl.html#.setDefaults"><code>module:twgl.setDefaults</code></a></li></ul></dd>
</dl>
<h5>Parameters:</h5>
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>prefix</code></td>
<td class="type">
<span class="param-type"><code>string</code></span>
</td>
<td class="description last">
<p>prefix for attribs</p>
</td>
</tr>
</tbody>
</table>
</div>
<h3 class="subsection-title">Type Definitions</h3>
<div class="section-members">
<h4 class="name" id="~TypedArrayConstructor">TypedArrayConstructor</h4>
<dl class="details">
</dl>
<h5>Type:</h5>
<ul>
<li>
<span class="param-type"><code>Int8ArrayConstructor</code></span>
|
<span class="param-type"><code>Uint8ArrayConstructor</code></span>
|
<span class="param-type"><code>Int16ArrayConstructor</code></span>
|
<span class="param-type"><code>Uint16ArrayConstructor</code></span>
|
<span class="param-type"><code>Int32ArrayConstructor</code></span>
|
<span class="param-type"><code>Uint32ArrayConstructor</code></span>
|
<span class="param-type"><code>Float32ArrayConstructor</code></span>
</li>
</ul>
</div>
</article>
</section>
</div>
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