<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html> <head> <script type="text/javascript" src="libs/three.js"></script> <script type="text/javascript"> function init() { var renderer = new THREE.WebGLRenderer({ canvas: document.getElementById('mainCanvas') }); renderer.setClearColor(0x000000); var scene = new THREE.Scene(); // camera var camera = new THREE.OrthographicCamera(-5, 5, 3.75, -3.75, 0.1, 100); camera.position.set(25, 25, 25); camera.lookAt(new THREE.Vector3(0, 0, 0)); scene.add(camera); // draw axes to help you understand the coordinate drawAxes(scene); var material = new THREE.MeshBasicMaterial({ color: 0xffff00, wireframe: true }); // init an empty geometry var geometry = new THREE.Geometry(); // set vertices // 4 vertices on top geometry.vertices.push(new THREE.Vector3(-1, 2, -1)); geometry.vertices.push(new THREE.Vector3(1, 2, -1)); geometry.vertices.push(new THREE.Vector3(1, 2, 1)); geometry.vertices.push(new THREE.Vector3(-1, 2, 1)); // 4 vertices on bottom geometry.vertices.push(new THREE.Vector3(-2, 0, -2)); geometry.vertices.push(new THREE.Vector3(2, 0, -2)); geometry.vertices.push(new THREE.Vector3(2, 0, 2)); geometry.vertices.push(new THREE.Vector3(-2, 0, 2)); // set faces // top face geometry.faces.push(new THREE.Face3(0, 1, 3)); geometry.faces.push(new THREE.Face3(1, 2, 3)); // bottom face geometry.faces.push(new THREE.Face3(4, 5, 6)); geometry.faces.push(new THREE.Face3(5, 6, 7)); // side faces geometry.faces.push(new THREE.Face3(1, 5, 6)); geometry.faces.push(new THREE.Face3(6, 2, 1)); geometry.faces.push(new THREE.Face3(2, 6, 7)); geometry.faces.push(new THREE.Face3(7, 3, 2)); geometry.faces.push(new THREE.Face3(3, 7, 0)); geometry.faces.push(new THREE.Face3(7, 4, 0)); geometry.faces.push(new THREE.Face3(0, 4, 5)); geometry.faces.push(new THREE.Face3(0, 5, 1)); var mesh = new THREE.Mesh(geometry, material); scene.add(mesh); // render renderer.render(scene, camera); } function drawAxes(scene) { // x-axis var xGeo = new THREE.Geometry(); xGeo.vertices.push(new THREE.Vector3(0, 0, 0)); xGeo.vertices.push(new THREE.Vector3(1, 0, 0)); var xMat = new THREE.LineBasicMaterial({ color: 0xff0000 }); var xAxis = new THREE.Line(xGeo, xMat); scene.add(xAxis); // y-axis var yGeo = new THREE.Geometry(); yGeo.vertices.push(new THREE.Vector3(0, 0, 0)); yGeo.vertices.push(new THREE.Vector3(0, 1, 0)); var yMat = new THREE.LineBasicMaterial({ color: 0x00ff00 }); var yAxis = new THREE.Line(yGeo, yMat); scene.add(yAxis); // z-axis var zGeo = new THREE.Geometry(); zGeo.vertices.push(new THREE.Vector3(0, 0, 0)); zGeo.vertices.push(new THREE.Vector3(0, 0, 1)); var zMat = new THREE.LineBasicMaterial({ color: 0x00ccff }); var zAxis = new THREE.Line(zGeo, zMat); scene.add(zAxis); } </script> </head> <body onload="init()"> <canvas id="mainCanvas" width="400px" height="300px" ></canvas> </body> </html>
