我有以下 JavaScript 代码,取自一个示例,它绘制了一些圆圈,当您单击其中一个圆圈时,它会改变颜色。但我还想在单击该圆圈时更改该圆圈的半径/大小(并保持其他圆圈不变)。这文档 https://threejs.org/docs/index.html#api/geometries/CircleGeometry根本没有帮助,我已经尝试了代码中的几种变体,例如
intersects[ 0 ].object.geometry.parameters.radius = 50;
intersects[ 0 ].object.geometry.radius = 50;
intersects[ 0 ].object.geometry.setRadius(50);
无论如何,这是完整的代码:
var container, camera, scene, geometry, mesh, renderer, controls, particles, colors;
var objects = [];
// DOM element...
container = document.createElement('div');
document.body.appendChild(container);
// Camera...
camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 1, 10000);
camera.position.set(0, 0, 75);
// Scene...
scene = new THREE.Scene();
scene.add(camera);
// Renderer...
renderer = new THREE.WebGLRenderer({
clearAlpha: 1
});
renderer.setSize(window.innerWidth, window.innerHeight);
renderer.setClearColor(0xffffff, 1);
document.body.appendChild(renderer.domElement);
// Scatter plot...
scatterPlot = new THREE.Object3D();
scene.add(scatterPlot);
// Make grid...
xzColor = 'black';
xyColor = 'black';
yzColor = 'black';
// Plot some random points...
circle = new THREE.CircleGeometry(5);
colors = [];
var max = 50;
var min = -50;
for (var i = 0; i < 10; i++) {
var object = new THREE.Mesh( circle, new THREE.MeshBasicMaterial( { color: Math.random() * 0xffffff, opacity: 0.5 } ) );
object.position.x = Math.random() * (max - min) + min;
object.position.y = Math.random() * (max - min) + min;
object.position.z = 0;
scene.add( object );
objects.push( object );
}
animate();
function animate() {
requestAnimationFrame(animate);
renderer.render(scene, camera);
}
raycaster = new THREE.Raycaster();
mouse = new THREE.Vector2();
document.addEventListener( 'mousedown', onDocumentMouseDown, false );
function onDocumentMouseDown( event ) {
event.preventDefault();
mouse.x = ( event.clientX / renderer.domElement.clientWidth ) * 2 - 1;
mouse.y = - ( event.clientY / renderer.domElement.clientHeight ) * 2 + 1;
raycaster.setFromCamera( mouse, camera );
var intersects = raycaster.intersectObjects( objects );
if ( intersects.length > 0 ) {
intersects[ 0 ].object.material.color.setHex( Math.random() * 0xffffff );
intersects[ 0 ].object.geometry.setRadius(50);
var particle = new THREE.Sprite( particleMaterial );
particle.position.copy( intersects[ 0 ].point );
particle.scale.x = particle.scale.y = 16;
scene.add( particle );
}
}
知道我该如何解决这个问题吗?我在哪里可以找到正确的文档?
附录:
在代码中,现在圆圈改变了它们的大小。但他们所有人!我单击一个圆圈,每个圆圈都会改变大小。对我来说没有意义......