mirror of
https://github.com/jiawanlong/Cesium-Examples.git
synced 2025-11-03 16:54:16 +00:00
594 lines
18 KiB
HTML
594 lines
18 KiB
HTML
<!--********************************************************************
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* by jiawanlong
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*********************************************************************-->
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="UTF-8" />
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<link rel="stylesheet" href="./../../cesium/Cesium1.72/Widgets/widgets.css" />
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<script type="text/javascript" src="./../../cesium/Cesium1.72/Cesium.js"></script>
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<script src="./ammolibs/ammo/ammo.js"></script>
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</head>
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<body style="
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margin: 0;
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overflow: hidden;
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background: #fff;
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width: 100%;
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height: 100%;
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position: absolute;
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top: 0;
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">
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<div id="cesiumContainer" style="margin: 0 auto; width: 100%; height: 100%"></div>
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<!-- 面板 -->
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<div class="infoview">
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操作提示：鼠标左键单击进行发射
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</div>
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<script src="./ammolibs/three/three.min.js"></script>
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<script src="./ammolibs/ammo/ex/ConvexObjectBreaker.js"></script>
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<script src="./ammolibs/ammo/ex/QuickHull.js"></script>
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<script src="./ammolibs/ammo/ex/geometries/ConvexGeometry.js"></script>
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<script src="./ammolibs/meshVisualizer/CesiumMeshVisualizer.js"></script>
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<script>
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Cesium.Ion.defaultAccessToken = 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJqdGkiOiI3ZjQ5ZGUzNC1jNWYwLTQ1ZTMtYmNjYS05YTY4ZTVmN2I2MDkiLCJpZCI6MTE3MTM4LCJpYXQiOjE2NzY0NDUyODB9.ZaNSBIfc1sGLhQd_xqhiSsc0yr8oS0wt1hAo9gbke6M'
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const viewer = new Cesium.Viewer('cesiumContainer', {});
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var homePosition = [117.220206, 31.834866, 100]; //初始位置
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look(homePosition[0], homePosition[1], homePosition[2]);
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viewer.scene.debugShowFramesPerSecond = true; //查看帧率
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MeshVisualizer = Cesium.MeshVisualizer;
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Mesh = Cesium.Mesh;
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MeshMaterial = Cesium.MeshMaterial;
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FramebufferTexture = Cesium.FramebufferTexture;
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GeometryUtils = Cesium.GeometryUtils;
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MeshPhongMaterial = Cesium.MeshPhongMaterial;
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BasicMeshMaterial = Cesium.BasicMeshMaterial;
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LOD = Cesium.LOD;
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var center = Cesium.Cartesian3.fromDegrees(homePosition[0], homePosition[1], 10);
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var modelMatrix = Cesium.Transforms.eastNorthUpToFixedFrame(center);
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var meshVisualizer = new MeshVisualizer({
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modelMatrix: modelMatrix,
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up: {
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y: 1
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},
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referenceAxisParameter: {
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length: 100,
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width: 0.05,
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headLength: 2,
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headWidth: 0.1
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}
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});
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viewer.scene.primitives.add(meshVisualizer);
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meshVisualizer.showReference = true; //显示坐标轴
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function createRandomColor() {
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return Cesium.Color.fromRandom({
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alpha: 1
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}) //fromRgba(Math.floor(Math.random() * (1 << 24)));
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}
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function createMaterial(color) {
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if (typeof color === 'string') {
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} else if (Cesium.defined(color)) {
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color = Cesium.Color.fromRgba(color).withAlpha(1);
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} else {
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color = createRandomColor();
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}
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return new MeshPhongMaterial({
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defaultColor: color,
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side: MeshMaterial.Sides.DOUBLE,
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translucent: false
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});
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}
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var groundMaterial = new MeshPhongMaterial({
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defaultColor: "rgb(200,200,200)",
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side: MeshMaterial.Sides.DOUBLE,
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translucent: false
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})
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Cesium.Cartesian3.prototype.set = function (x, y, z) {
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this.x = x;
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this.y = y;
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this.z = z;
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}
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Cesium.Cartesian2.prototype.set = function (x, y) {
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this.x = x;
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this.y = y;
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}
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Cesium.Quaternion.prototype.set = function (x, y, z, w) {
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this.x = x;
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this.y = y;
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this.z = z;
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this.w = w;
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}
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Ammo().then(function () {
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// - Global variables -
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// Graphics variables
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var clock = new THREE.Clock();
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var mouseCoords = new THREE.Vector2();
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var raycaster = new THREE.Raycaster();
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var ballMaterial = createMaterial(0x202020);
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// Physics variables
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var gravityConstant = 7.8;
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var collisionConfiguration;
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var dispatcher;
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var broadphase;
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var solver;
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var physicsWorld;
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var margin = 0.05;
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var convexBreaker = new THREE.ConvexObjectBreaker();
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// Rigid bodies include all movable objects
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var rigidBodies = [];
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var pos = new THREE.Vector3();
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var quat = new THREE.Quaternion();
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var transformAux1 = new Ammo.btTransform();
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var tempBtVec3_1 = new Ammo.btVector3(0, 0, 0);
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var time = 0;
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var objectsToRemove = [];
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for (var i = 0; i < 500; i++) {
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objectsToRemove[i] = null;
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}
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var numObjectsToRemove = 0;
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var impactPoint = new THREE.Vector3();
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var impactNormal = new THREE.Vector3();
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function initPhysics() {
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// Physics configuration
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collisionConfiguration = new Ammo.btDefaultCollisionConfiguration();
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dispatcher = new Ammo.btCollisionDispatcher(collisionConfiguration);
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broadphase = new Ammo.btDbvtBroadphase();
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solver = new Ammo.btSequentialImpulseConstraintSolver();
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physicsWorld = new Ammo.btDiscreteDynamicsWorld(dispatcher, broadphase, solver, collisionConfiguration);
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physicsWorld.setGravity(new Ammo.btVector3(0, -gravityConstant, 0));
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}
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function createObject(mass, halfExtents, pos, quat, material) {
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//y，z调换位置
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var object = new THREE.Mesh(new THREE.BoxGeometry(halfExtents.x * 2, halfExtents.y * 2, halfExtents.z * 2),
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material);
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object.position.copy(pos);
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object.quaternion.copy(quat);
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//object.position.y += 3;
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convexBreaker.prepareBreakableObject(object, mass, new THREE.Vector3(), new THREE.Vector3(), true);
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createDebrisFromBreakableObject(object);
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}
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function createObjects() {
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// Ground
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pos.set(0, -0.5, 0);
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quat.set(0, 0, 0, 1);
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var ground = createParalellepipedWithPhysics(40, 1, 40, 0, pos, quat, createMaterial(0xFFFFFF));
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// Tower 1
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var towerMass = 1000;
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var towerHalfExtents = new THREE.Vector3(2, 5, 2);
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pos.set(-8, 5, 0);
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quat.set(0, 0, 0, 1);
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createObject(towerMass, towerHalfExtents, pos, quat, createMaterial("rgb(247,174,68)"));
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// Tower 2
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pos.set(8, 5, 0);
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quat.set(0, 0, 0, 1);
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createObject(towerMass, towerHalfExtents, pos, quat, createMaterial("rgb(247,174,68)"));
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//Bridge
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var bridgeMass = 100;
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var bridgeHalfExtents = new THREE.Vector3(7, 0.2, 1.5);
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pos.set(0, 10.2, 0);
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quat.set(0, 0, 0, 1);
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createObject(bridgeMass, bridgeHalfExtents, pos, quat, createMaterial("rgb(247,174,68)"));
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// Stones
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var stoneMass = 120;
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var stoneHalfExtents = new THREE.Vector3(1, 2, 0.15);
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var numStones = 8;
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quat.set(0, 0, 0, 1);
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for (var i = 0; i < numStones; i++) {
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pos.set(0, 2, 15 * (0.5 - i / (numStones + 1)));
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createObject(stoneMass, stoneHalfExtents, pos, quat, createMaterial(0xB0B0B0));
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}
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// Mountain
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var mountainMass = 860;
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var mountainHalfExtents = new THREE.Vector3(4, 5, 4);
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pos.set(5, mountainHalfExtents.y * 0.5, -7);
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quat.set(0, 0, 0, 1);
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var mountainPoints = [];
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//y，z调换位置
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mountainPoints.push(new THREE.Vector3(mountainHalfExtents.x, -mountainHalfExtents.y, mountainHalfExtents
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.z));
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mountainPoints.push(new THREE.Vector3(-mountainHalfExtents.x, -mountainHalfExtents.y, mountainHalfExtents
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.z));
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mountainPoints.push(new THREE.Vector3(mountainHalfExtents.x, -mountainHalfExtents.y, -mountainHalfExtents
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.z));
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mountainPoints.push(new THREE.Vector3(-mountainHalfExtents.x, -mountainHalfExtents.y, -mountainHalfExtents
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.z));
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mountainPoints.push(new THREE.Vector3(0, mountainHalfExtents.y, 0));
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var mountain = new THREE.Mesh(new THREE.ConvexGeometry(mountainPoints), createMaterial("rgb(247,174,68)"));
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mountain.position.copy(pos);
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mountain.quaternion.copy(quat);
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convexBreaker.prepareBreakableObject(mountain, mountainMass, new THREE.Vector3(), new THREE.Vector3(),
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true);
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createDebrisFromBreakableObject(mountain);
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}
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function createParalellepipedWithPhysics(sx, sy, sz, mass, pos, quat, material) {
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var box = Cesium.BoxGeometry.createGeometry(Cesium.BoxGeometry.fromDimensions({
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dimensions: new Cesium.Cartesian3(sx, sy, sz),
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vertexFormat: new Cesium.VertexFormat({
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position: true,
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normal: true
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})
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}));
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var object = new Mesh(box, material);
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object.quaternion = new Cesium.Quaternion();
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var shape = new Ammo.btBoxShape(new Ammo.btVector3(sx * 0.5, sy * 0.5, sz * 0.5));
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shape.setMargin(margin);
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createRigidBody(object, shape, mass, pos, quat);
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return object;
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}
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function createDebrisFromBreakableObject(object) {
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object.castShadow = true;
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object.receiveShadow = true;
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var shape = createConvexHullPhysicsShape(object.geometry.vertices);
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shape.setMargin(margin);
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var body = createRigidBody(object, shape, object.userData.mass, null, null, object.userData.velocity, object
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.userData.angularVelocity);
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// Set pointer back to the three object only in the debris objects
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var btVecUserData = new Ammo.btVector3(0, 0, 0);
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btVecUserData.threeObject = object;
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body.setUserPointer(btVecUserData);
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}
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function removeDebris(object) {
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meshVisualizer.remove(object);
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physicsWorld.removeRigidBody(object.userData.physicsBody);
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}
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function createConvexHullPhysicsShape(points) {
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var shape = new Ammo.btConvexHullShape();
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for (var i = 0, il = points.length; i < il; i++) {
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var p = points[i];
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tempBtVec3_1.setValue(p.x, p.y, p.z); //y,z调换位置
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var lastOne = (i === (il - 1));
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shape.addPoint(tempBtVec3_1, lastOne);
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}
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return shape;
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}
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function createRigidBody(object, physicsShape, mass, pos, quat, vel, angVel) {
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if (pos) {
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object.position.copy(pos);
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} else {
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pos = object.position;
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}
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if (quat) {
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if (object.quaternion)
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object.quaternion.copy(quat);
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} else {
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quat = object.quaternion;
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}
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var transform = new Ammo.btTransform();
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transform.setIdentity();
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transform.setOrigin(new Ammo.btVector3(pos.x, pos.y, pos.z));
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transform.setRotation(new Ammo.btQuaternion(quat.x, quat.y, quat.z, quat.w));
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var motionState = new Ammo.btDefaultMotionState(transform);
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var localInertia = new Ammo.btVector3(0, 0, 0);
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physicsShape.calculateLocalInertia(mass, localInertia);
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var rbInfo = new Ammo.btRigidBodyConstructionInfo(mass, motionState, physicsShape, localInertia);
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var body = new Ammo.btRigidBody(rbInfo);
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body.setFriction(0.5);
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if (vel) {
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body.setLinearVelocity(new Ammo.btVector3(vel.x, vel.y, vel.z));
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}
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if (angVel) {
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body.setAngularVelocity(new Ammo.btVector3(angVel.x, angVel.y, angVel.z));
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}
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object.userData.physicsBody = body;
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object.userData.collided = false;
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meshVisualizer.add(object);
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if (mass > 0) {
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rigidBodies.push(object);
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// Disable deactivation
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body.setActivationState(4);
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}
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physicsWorld.addRigidBody(body);
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return body;
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}
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function updatePhysics(deltaTime) {
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// Step world
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physicsWorld.stepSimulation(deltaTime, 10);
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// Update rigid bodies
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for (var i = 0, il = rigidBodies.length; i < il; i++) {
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var objThree = rigidBodies[i];
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var objPhys = objThree.userData.physicsBody;
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var ms = objPhys.getMotionState();
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if (ms) {
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ms.getWorldTransform(transformAux1);
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var p = transformAux1.getOrigin();
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var q = transformAux1.getRotation();
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objThree.position.set(p.x(), p.y(), p.z());
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if (objThree.quaternion) {
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objThree.quaternion.set(q.x(), q.y(), q.z(), q.w());
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}
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objThree.userData.collided = false;
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objThree.modelMatrixNeedsUpdate = true;
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}
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}
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for (var i = 0, il = dispatcher.getNumManifolds(); i < il; i++) {
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var contactManifold = dispatcher.getManifoldByIndexInternal(i);
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var rb0 = contactManifold.getBody0();
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var rb1 = contactManifold.getBody1();
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var threeObject0 = Ammo.castObject(rb0.getUserPointer(), Ammo.btVector3).threeObject;
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var threeObject1 = Ammo.castObject(rb1.getUserPointer(), Ammo.btVector3).threeObject;
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if (!threeObject0 && !threeObject1) {
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continue;
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}
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var userData0 = threeObject0 ? threeObject0.userData : null;
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var userData1 = threeObject1 ? threeObject1.userData : null;
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var breakable0 = userData0 ? userData0.breakable : false;
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var breakable1 = userData1 ? userData1.breakable : false;
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var collided0 = userData0 ? userData0.collided : false;
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var collided1 = userData1 ? userData1.collided : false;
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if ((!breakable0 && !breakable1) || (collided0 && collided1)) {
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continue;
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}
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var contact = false;
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var maxImpulse = 0;
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for (var j = 0, jl = contactManifold.getNumContacts(); j < jl; j++) {
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var contactPoint = contactManifold.getContactPoint(j);
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if (contactPoint.getDistance() < 0) {
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contact = true;
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var impulse = contactPoint.getAppliedImpulse();
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if (impulse > maxImpulse) {
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maxImpulse = impulse;
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var pos = contactPoint.get_m_positionWorldOnB();
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var normal = contactPoint.get_m_normalWorldOnB();
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impactPoint.set(pos.x(), pos.y(), pos.z());
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impactNormal.set(normal.x(), normal.y(), normal.z());
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}
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break;
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}
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}
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// If no point has contact, abort
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if (!contact) {
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continue;
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}
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// Subdivision
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var fractureImpulse = 250;
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if (breakable0 && !collided0 && maxImpulse > fractureImpulse) {
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var debris = convexBreaker.subdivideByImpact(threeObject0, impactPoint, impactNormal, 1, 2, 1.5);
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var numObjects = debris.length;
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for (var j = 0; j < numObjects; j++) {
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createDebrisFromBreakableObject(debris[j]);
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}
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objectsToRemove[numObjectsToRemove++] = threeObject0;
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userData0.collided = true;
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}
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if (breakable1 && !collided1 && maxImpulse > fractureImpulse) {
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var debris = convexBreaker.subdivideByImpact(threeObject1, impactPoint, impactNormal, 1, 2, 1.5);
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var numObjects = debris.length;
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for (var j = 0; j < numObjects; j++) {
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createDebrisFromBreakableObject(debris[j]);
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}
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objectsToRemove[numObjectsToRemove++] = threeObject1;
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userData1.collided = true;
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}
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}
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for (var i = 0; i < numObjectsToRemove; i++) {
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removeDebris(objectsToRemove[i]);
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}
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numObjectsToRemove = 0;
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}
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var ray = new Cesium.Ray();
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var clickRequest = false;
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var start = false;
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var hasInit = false;
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var startTime = new Date();
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var rayDir = new Cesium.Cartesian3();
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function initInput() {
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var scene = viewer.scene;
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var handler = new Cesium.ScreenSpaceEventHandler(scene.canvas);
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var lastMesh = null;
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handler.setInputAction(function (movement) {
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if (!clickRequest) {
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Cesium.Cartesian2.clone(movement.position, mouseCoords);
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clickRequest = true;
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}
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}, Cesium.ScreenSpaceEventType.LEFT_DOWN);
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}
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function processClick() {
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if (clickRequest) {
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meshVisualizer.getPickRay(mouseCoords, ray);
|
||
if (!ray) {
|
||
clickRequest = false;
|
||
return;
|
||
}
|
||
// Creates a ball
|
||
var ballMass = 35;
|
||
var ballRadius = 0.4;
|
||
var ball = new Mesh(new Cesium.SphereGeometry({
|
||
radius: ballRadius,
|
||
stackPartitions: 14,
|
||
slicePartitions: 10
|
||
}), ballMaterial);
|
||
|
||
var ballShape = new Ammo.btSphereShape(ballRadius);
|
||
ballShape.setMargin(margin);
|
||
|
||
Cesium.Cartesian3.clone(ray.direction, rayDir);
|
||
Cesium.Cartesian3.subtract(ray.origin, ray.direction, pos);
|
||
|
||
quat.set(0, 0, 0, 1);
|
||
var ballBody = createRigidBody(ball, ballShape, ballMass, pos, quat);
|
||
//ballBody.setFriction(0.5);
|
||
|
||
Cesium.Cartesian3.normalize(rayDir, rayDir);
|
||
Cesium.Cartesian3.multiplyByScalar(rayDir, 50, rayDir);
|
||
//console.log(rayDir);
|
||
ballBody.setLinearVelocity(new Ammo.btVector3(rayDir.x, rayDir.y, rayDir.z));
|
||
|
||
clickRequest = false;
|
||
|
||
}
|
||
|
||
}
|
||
var hs = false;
|
||
|
||
function update(frameState) {
|
||
if (hs)
|
||
return;
|
||
var deltaTime = (new Date() - startTime) / 1000.0;
|
||
updatePhysics(deltaTime);
|
||
processClick();
|
||
startTime = new Date();
|
||
// hs = true;
|
||
}
|
||
setTimeout(function () {
|
||
if (!hasInit) {
|
||
// - Init -
|
||
|
||
initPhysics();
|
||
|
||
createObjects();
|
||
|
||
initInput();
|
||
|
||
hasInit = true;
|
||
}
|
||
if (!start) {
|
||
startTime = new Date();
|
||
meshVisualizer.beforeUpdate.addEventListener(update);
|
||
start = true;
|
||
} else {
|
||
meshVisualizer.beforeUpdate.removeEventListener(update);
|
||
start = false;
|
||
|
||
}
|
||
}, 1000 * 3);
|
||
});
|
||
|
||
function look(lon, lat, offset) {
|
||
var center = Cesium.Cartesian3.fromDegrees(lon, lat);
|
||
var transform = Cesium.Transforms.eastNorthUpToFixedFrame(center);
|
||
|
||
// View in east-north-up frame
|
||
var camera = viewer.camera;
|
||
camera.constrainedAxis = Cesium.Cartesian3.UNIT_Z;
|
||
camera.lookAtTransform(transform, new Cesium.Cartesian3(-offset, -offset, offset));
|
||
setTimeout(function () {
|
||
camera.lookAtTransform(Cesium.Matrix4.IDENTITY);
|
||
}, 100)
|
||
}
|
||
</script>
|
||
</body>
|
||
|
||
</html> |