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Three.JS(1)直线

2016-07-05 19:31 337 查看

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Three框架</title>
<script src="js/build/Three.js" data-ke-src="js/Three.js"></script>
<script src="js/examples/js/renderers/CanvasRenderer.js"></script>
<script src="js/examples/js/renderers/Projector.js"></script>
<style type="text/css">
div#canvas-frame {
border: none;
cursor: pointer;
width: 100%;
height: 600px;
background-color: #EEEEEE;
}

</style>

<script>
var renderer;
function initThree() {
width = document.getElementById('canvas-frame').clientWidth;
height = document.getElementById('canvas-frame').clientHeight;
renderer = new THREE.CanvasRenderer({
antialias : true
});//在3D世界中是没有单位的概念的，Linewidth设置为100，webgl也不知道应该在屏幕中占据多少像素。 WebGLRenderer是不支持线宽度的，所以如果要画线并设置宽度请用CanvasRenderer，它是用二维canvas画布模拟3D效果，所以能够设置宽度。
renderer.setSize(width, height);
document.getElementById('canvas-frame').appendChild(renderer.domElement);
renderer.setClearColor(0xFFFFFF, 1.0);
}

var camera;
function initCamera() {
camera = new THREE.PerspectiveCamera(45, window.innerWidth/window.innerHeight, 1, 10000);
camera.position.x = 0;
camera.position.y = 1000;
camera.position.z = 0;
camera.up.x = 0;
camera.up.y = 0;
camera.up.z = 1;
camera.lookAt({
x : 0,
y : 0,
z : 0
});
}

var scene;
function initScene() {
scene = new THREE.Scene();
}

var cube;
function initObject() {

var geometry = new THREE.Geometry();
var material = new THREE.LineBasicMaterial( { vertexColors: THREE.VertexColors, linewidth: 100} );
var color1 = new THREE.Color( 0x444444 ), color2 = new THREE.Color( 0xFF0000 );

// 线的材质可以由2点的颜色决定
var p1 = new THREE.Vector3( -100, 0, 100 );
var p2 = new THREE.Vector3(  100, 0, -100 );
geometry.vertices.push(p1);
geometry.vertices.push(p2);
geometry.colors.push( color1, color2 );

var line = new THREE.Line( geometry, material, THREE.LinePieces );
scene.add(line);
}
function render()
{
renderer.clear();
renderer.render(scene, camera);
requestAnimationFrame(render);
}
function threeStart() {
initThree();
initCamera();
initScene();
initObject();
render();
}

</script>
</head>

<body onload="threeStart();">
<div id="canvas-frame"></div>
</body>
</html>

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