I have tried to give 3D feeling to SVG paths (lineto and moveto) by extruding shapes using Three.js, but the process causes some artifacts that I cannot remove.
What could cause odd artifacts in my rendered 3D shape? Is there a way to remove them?
The artifacts are marked with arrows in the sample image below.
The live example is here: http://jsfiddle.net/pHn2B/24/
And the code is here:
// Picking with Callback // three.js r.52 var container, info, camera, scene, light, geometry, mesh, projector, renderer, controls; objects = []; // dom container = document.createElement( 'div' ); document.body.appendChild( container ); // info info = document.createElement( 'div' ); info.style.position = 'absolute'; info.style.top = '10px'; info.style.width = '100%'; info.style.textAlign = 'center'; info.innerHTML = "drag to rotate camera; click to select"; container.appendChild( info ); // renderer renderer = new THREE.CanvasRenderer(); renderer.setSize( window.innerWidth, window.innerHeight ); container.appendChild( renderer.domElement ); // scene scene = new THREE.Scene(); // camera camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 1, 10000 ); camera.position.set( 0, 300, 500 ); scene.add( camera ); // controls controls = new THREE.OrbitControls( camera ); // light scene.add( new THREE.AmbientLight( 0x222222 ) ); // light light = new THREE.PointLight( 0xaaaaaa ); light.position = camera.position; scene.add( light ); // geometry geometry = new THREE.CubeGeometry( 100, 100, 500 ); // material material = new THREE.MeshLambertMaterial( { color: 0xff0000, ambient: 0xff0000, overdraw: true } ); // mesh mesh = new THREE.Mesh( geometry, material ); mesh.position.set( -100, -100, 200 ); mesh.name = "Red Object"; mesh.callback = function() { info.innerHTML = this.name; } scene.add( mesh ); objects.push( mesh ); // geometry //////////// // CUSTOM // //////////// var starPoints2 = new THREE.Shape(); starPoints2.moveTo(307.94,275.49); starPoints2.lineTo(296.26,275.23); starPoints2.lineTo(286.64,272.99); starPoints2.lineTo(279.78,269.31); starPoints2.lineTo(274.14,263.55); starPoints2.lineTo(271.65,260.21); starPoints2.lineTo(269.2,261.06); starPoints2.lineTo(254.83,268.51); starPoints2.lineTo(242.11,272.97); starPoints2.lineTo(227.59,275.23); starPoints2.lineTo(209.91,275.48); starPoints2.lineTo(197.47,273.63); starPoints2.lineTo(187.91,270.13); starPoints2.lineTo(180.48,265.09); starPoints2.lineTo(175.32,258.88); starPoints2.lineTo(172.2,251.44); starPoints2.lineTo(171.1,242.23); starPoints2.lineTo(172.24,233.63); starPoints2.lineTo(175.49,226.24); starPoints2.lineTo(181,219.54); starPoints2.lineTo(189.42,213.3); starPoints2.lineTo(201.36,207.73); starPoints2.lineTo(217.23,203.25); starPoints2.lineTo(238.28,200.1); starPoints2.lineTo(269.37,198.47); starPoints2.lineTo(269.98,182.93); starPoints2.lineTo(268.74,171.32); starPoints2.lineTo(266.05,163.7); starPoints2.lineTo(261.58,157.72); starPoints2.lineTo(255.24,153.24); starPoints2.lineTo(247.06,150.32); starPoints2.lineTo(235.44,149.13); starPoints2.lineTo(224.71,150.05); starPoints2.lineTo(215.91,153); starPoints2.lineTo(210.23,156.86); starPoints2.lineTo(207.64,160.85); starPoints2.lineTo(207.19,165.28); starPoints2.lineTo(209.34,169.86); starPoints2.lineTo(212.01,174.15); starPoints2.lineTo(212.14,177.99); starPoints2.lineTo(209.8,181.78); starPoints2.lineTo(204.22,185.79); starPoints2.lineTo(197.62,187.68); starPoints2.lineTo(188.65,187.43); starPoints2.lineTo(182.41,185.39); starPoints2.lineTo(178.45,181.77); starPoints2.lineTo(176.2,176.9); starPoints2.lineTo(176.03,170.64); starPoints2.lineTo(178.2,164.13); starPoints2.lineTo(183.09,157.69); starPoints2.lineTo(191.04,151.36); starPoints2.lineTo(202.01,145.82); starPoints2.lineTo(216.09,141.57); starPoints2.lineTo(232.08,139.24); starPoints2.lineTo(250.07,139.18); starPoints2.lineTo(266.13,141.23); starPoints2.lineTo(279.05,145.06); starPoints2.lineTo(289.15,150.3); starPoints2.lineTo(295.91,156.19); starPoints2.lineTo(300.73,163.41); starPoints2.lineTo(303.85,172.47); starPoints2.lineTo(305.07,183.78); starPoints2.lineTo(305.07,241.97); starPoints2.lineTo(306,251.51); starPoints2.lineTo(308.18,256.39); starPoints2.lineTo(311.72,259.09); starPoints2.lineTo(317.31,260.01); starPoints2.lineTo(324.71,259.01); starPoints2.lineTo(332.45,255.86); starPoints2.lineTo(335.57,257.53); starPoints2.lineTo(337.6,260.44); starPoints2.lineTo(336.94,262.33); starPoints2.lineTo(328.27,268.74); starPoints2.lineTo(317.89,273.41); starPoints2.lineTo(307.94,275.49); /* starPoints2.moveTo(245.79,125.33); starPoints2.lineTo(232.93,124.53); starPoints2.lineTo(222.21,121.74); starPoints2.lineTo(213.14,117.11); starPoints2.lineTo(207.36,111.92); starPoints2.lineTo(203.7,105.75); starPoints2.lineTo(201.94,98.18); starPoints2.lineTo(202.34,90.12); starPoints2.lineTo(204.86,83.4); starPoints2.lineTo(210.01,76.81); starPoints2.lineTo(217.49,71.33); starPoints2.lineTo(227.17,67.31); starPoints2.lineTo(238.35,65.2); starPoints2.lineTo(243.99,64.95); starPoints2.lineTo(255.92,66.06); starPoints2.lineTo(266.21,69.28); starPoints2.lineTo(274.98,74.44); starPoints2.lineTo(280.64,80.19); starPoints2.lineTo(284.02,86.85); starPoints2.lineTo(285.26,94.52); starPoints2.lineTo(284.27,102.84); starPoints2.lineTo(281.24,109.66); starPoints2.lineTo(276.03,115.43); starPoints2.lineTo(267.89,120.46); starPoints2.lineTo(257.68,123.93); starPoints2.lineTo(245.79,125.33); */ var smileyEye1Path = new THREE.Path(); smileyEye1Path.moveTo(221.69,258.13); smileyEye1Path.lineTo(215.2,255.08); smileyEye1Path.lineTo(210.86,250.57); smileyEye1Path.lineTo(208.4,244.49); smileyEye1Path.lineTo(207.92,237.03); smileyEye1Path.lineTo(209.69,230.71); smileyEye1Path.lineTo(213.82,224.85); smileyEye1Path.lineTo(220.9,219.34); smileyEye1Path.lineTo(230.95,214.67); smileyEye1Path.lineTo(245.76,210.86); smileyEye1Path.lineTo(266.59,208.36); smileyEye1Path.lineTo(269.48,208.76); smileyEye1Path.lineTo(269.99,212.88); smileyEye1Path.lineTo(269.99,244.81); smileyEye1Path.lineTo(269.34,247.02); smileyEye1Path.lineTo(266.07,250.04); smileyEye1Path.lineTo(255.27,255.23); smileyEye1Path.lineTo(242.52,258.58); smileyEye1Path.lineTo(230.57,259.43); smileyEye1Path.lineTo(221.69,258.13); /* smileyEye1Path.moveTo(238.44,116.65); smileyEye1Path.lineTo(231.99,114.29); smileyEye1Path.lineTo(227.23,110.22); smileyEye1Path.lineTo(223.94,104.53); smileyEye1Path.lineTo(222.41,96.92); smileyEye1Path.lineTo(223.05,88.57); smileyEye1Path.lineTo(225.65,82.21); smileyEye1Path.lineTo(230.07,77.36); smileyEye1Path.lineTo(235.93,74.4); smileyEye1Path.lineTo(243.68,73.34); smileyEye1Path.lineTo(246.08,73.43); smileyEye1Path.lineTo(253.37,75.08); smileyEye1Path.lineTo(258.65,78.43); smileyEye1Path.lineTo(262.47,83.41); smileyEye1Path.lineTo(264.59,90.25); smileyEye1Path.lineTo(264.64,98.93); smileyEye1Path.lineTo(262.63,106.12); smileyEye1Path.lineTo(258.87,111.5); smileyEye1Path.lineTo(253.73,115.1); smileyEye1Path.lineTo(246.81,116.94); smileyEye1Path.lineTo(238.44,116.65); */ var starShape = starPoints2; starShape.holes.push( smileyEye1Path ); var extrusionSettings = { //size: 1, height: 1, curveSegments: 100, step = 10, // font, weight, style, amount:20, bevelEnabled: true, bevelThickness: 0.5, bevelSize: 0.5, bevelSegments: 8, // extrudePath: // bendPath: material: 0, extrudeMaterial: 1 //, //uvGenerator: BoundingUVGenerator //uvGenerator: THREE.ExtrudeGeometry.WorldUVGenerator }; var starGeometry = new THREE.ExtrudeGeometry( starShape, extrusionSettings ); var materialFront = new THREE.MeshLambertMaterial( { color: 0xffff00, ambient: 0xffff00, overdraw: false, transparent:false, opacity: 1.0, side: THREE.DoubleSide } ); var materialSide = new THREE.MeshLambertMaterial( { color: 0xff8800, ambient: 0xff8800, overdraw: false, transparent:false, opacity: 1.0, side: THREE.DoubleSide } ); //var crateTexture = new THREE.ImageUtils.loadTexture( 'http://www.kahkonen.com/asiakkaat/crate2.gif'); //var crateTexture = new THREE.ImageUtils.generateDataTexture(10,10,{r:255,g:0,b:0}); //var materialFront = new THREE.MeshBasicMaterial( { map: crateTexture } ); var materialArray = [ materialFront, materialSide ]; var materialArray = [ materialFront, materialSide ]; var starMaterial = new THREE.MeshFaceMaterial(materialArray); var star = new THREE.Mesh( starGeometry, starMaterial ); star.position.set(-150,-150,0); scene.add(star); /* // add a wireframe to model var wireframeTexture = new THREE.MeshBasicMaterial( { color: 0x000000, wireframe: true, transparent: false } ); var star = new THREE.Mesh( starGeometry, wireframeTexture ); star.position.set(50,10,0); scene.add(star); */ objects.push( star ); // projector projector = new THREE.Projector(); // listeners document.addEventListener( 'mousedown', onDocumentMouseDown, false) // keyboard handler function onDocumentMouseDown( event ) { event.preventDefault(); var vector = new THREE.Vector3( ( event.clientX / window.innerWidth ) * 2 - 1, - ( event.clientY / window.innerHeight ) * 2 + 1, 0.5 ); projector.unprojectVector( vector, camera ); var ray = new THREE.Ray( camera.position, vector.subSelf( camera.position ).normalize() ); var intersects = ray.intersectObjects( objects ); if ( intersects.length > 0 ) { intersects[0].object.callback(); } } // render function render() { controls.update() renderer.render( scene, camera ); } // animate (function animate() { requestAnimationFrame( animate ); render(); }());
I have tried to remove artifacts by appending texture, but texture is not shown at all:
Other problem (that may or may not be related to artifact-problem) is that background can be seen through edges.
Texture is not a must, but removing artifacts is.
The code that I have used to add texture is below and full code in the fiddle (link is after the code):
var crateTexture = new THREE.ImageUtils.loadTexture( 'http://www.kahkonen.com/asiakkaat/crate.gif');
var crateTexture = new THREE.ImageUtils.generateDataTexture(10,10,{r:255,g:0,b:0});
var materialFront = new THREE.MeshBasicMaterial( { map: crateTexture } );
// http://jsfiddle.net/pHn2B/27/
Sample images are from Chrome. The same behavior occurs in Firefox too.