Created
September 1, 2011 18:47
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Three.js WebGL Canvas Texture Text Example
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| <!doctype html> | |
| <html> | |
| <head> | |
| <title>Three.js : WebGL Canvas Texture Text Example</title> | |
| <style type="text/css"> | |
| * { | |
| margin: 0; | |
| padding: 0; | |
| } | |
| body { | |
| overflow: hidden; | |
| } | |
| </style> | |
| <script type="text/javascript" src="js/Three.js"></script> | |
| <script type="text/javascript" src="js/RequestAnimationFrame.js"></script> | |
| <script type="text/javascript" src="js/Stats.js"></script> | |
| <script type="text/javascript"> | |
| // based on https://github.com/mrdoob/three.js/issues/229 | |
| window.onload = function() { | |
| var container, stats; | |
| var camera, scene, renderer; | |
| var mesh; | |
| init(); | |
| animate(); | |
| function init() { | |
| container = document.createElement('div'); | |
| document.body.appendChild(container); | |
| camera = new THREE.Camera(75, window.innerWidth / window.innerHeight, 1, 1000); | |
| camera.position.z = 1000; | |
| scene = new THREE.Scene(); | |
| renderer = new THREE.WebGLRenderer({ | |
| antialias : true | |
| }); | |
| renderer.setSize(window.innerWidth, window.innerHeight); | |
| container.appendChild(renderer.domElement); | |
| stats = new Stats(); | |
| stats.domElement.style.position = 'absolute'; | |
| stats.domElement.style.top = '0px'; | |
| container.appendChild(stats.domElement); | |
| var x = window.innerWidth / 2 - 300; | |
| var y = window.innerHeight / 2 - 300; | |
| mesh = createLabel("HELLO WORLD", x, y, 0, 100, "black", "yellow"); | |
| scene.addObject(mesh); | |
| } | |
| function createLabel(text, x, y, z, size, color, backGroundColor, backgroundMargin) { | |
| if(!backgroundMargin) | |
| backgroundMargin = 50; | |
| var canvas = document.createElement("canvas"); | |
| var context = canvas.getContext("2d"); | |
| context.font = size + "pt Arial"; | |
| var textWidth = context.measureText(text).width; | |
| canvas.width = textWidth + backgroundMargin; | |
| canvas.height = size + backgroundMargin; | |
| context = canvas.getContext("2d"); | |
| context.font = size + "pt Arial"; | |
| if(backGroundColor) { | |
| context.fillStyle = backGroundColor; | |
| context.fillRect(canvas.width / 2 - textWidth / 2 - backgroundMargin / 2, canvas.height / 2 - size / 2 - +backgroundMargin / 2, textWidth + backgroundMargin, size + backgroundMargin); | |
| } | |
| context.textAlign = "center"; | |
| context.textBaseline = "middle"; | |
| context.fillStyle = color; | |
| context.fillText(text, canvas.width / 2, canvas.height / 2); | |
| // context.strokeStyle = "black"; | |
| // context.strokeRect(0, 0, canvas.width, canvas.height); | |
| var texture = new THREE.Texture(canvas); | |
| texture.needsUpdate = true; | |
| var material = new THREE.MeshBasicMaterial({ | |
| map : texture | |
| }); | |
| var mesh = new THREE.Mesh(new THREE.PlaneGeometry(canvas.width, canvas.height), material); | |
| // mesh.overdraw = true; | |
| mesh.doubleSided = true; | |
| mesh.position.x = x - canvas.width; | |
| mesh.position.y = y - canvas.height; | |
| mesh.position.z = z; | |
| return mesh; | |
| } | |
| function animate() { | |
| requestAnimationFrame(animate); | |
| renderer.render(scene, camera); | |
| stats.update(); | |
| } | |
| }; | |
| </script> | |
| </head> | |
| <body></body> | |
| </html> |
Same as @bartburkhardt here. Is it possible to see a live demo? Thanks!
seems like function createLabel() is defined, but it's not called in animate(). I will test it today.
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error: S3TC compressed textures not supported