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Using canvas as ThreeJS texture
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title>JS Bin</title> | |
| </head> | |
| <body style="background:#fff;"> | |
| <script src="http://cdnjs.cloudflare.com/ajax/libs/three.js/r68/three.min.js"></script> | |
| <canvas id="canvas"></canvas> | |
| <script id="jsbin-javascript"> | |
| var width = window.innerWidth, height = window.innerHeight / 2; | |
| var size = 256; | |
| var canvas = document.getElementById('canvas'), | |
| ctx = canvas.getContext('2d'); | |
| var camera, scene, renderer, geometry, texture, mesh; | |
| function changeCanvas() { | |
| ctx.font = '20pt Arial'; | |
| ctx.fillStyle = 'red'; | |
| ctx.fillRect(0, 0, canvas.width, canvas.height); | |
| ctx.fillStyle = 'white'; | |
| ctx.fillRect(10, 10, canvas.width - 20, canvas.height - 20); | |
| ctx.fillStyle = 'black'; | |
| ctx.textAlign = "center"; | |
| ctx.textBaseline = "middle"; | |
| ctx.fillText(new Date().getTime(), canvas.width / 2, canvas.height / 2); | |
| } | |
| function init() { | |
| renderer = new THREE.WebGLRenderer(); | |
| renderer.setSize(width, height); | |
| document.body.appendChild(renderer.domElement); | |
| scene = new THREE.Scene(); | |
| camera = new THREE.PerspectiveCamera(70, width / height, 1, 1000); | |
| camera.position.z = 500; | |
| scene.add(camera); | |
| texture = new THREE.Texture(canvas); | |
| var material = new THREE.MeshBasicMaterial({ map: texture }); | |
| geometry = new THREE.BoxGeometry( 200, 200, 200 ); | |
| mesh = new THREE.Mesh( geometry, material ); | |
| scene.add( mesh ); | |
| canvas.width = canvas.height = size; | |
| } | |
| function animate() { | |
| requestAnimationFrame(animate); | |
| changeCanvas(); | |
| texture.needsUpdate = true; | |
| mesh.rotation.y += 0.01; | |
| renderer.render(scene, camera); | |
| } | |
| init(); | |
| animate(); | |
| </script> | |
| </body> | |
| </html> |
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Fails if canvas is 8192x4096, far less than the max texture and framebuffer sizes for me, any ideas?