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cesium_example_auth


			
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    <meta name="author" content="火星科技 http://mars3d.cn " />
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    <meta name="keywords" content="火星科技,cesium,3D,GIS,marsgis,三维,地球,地图,开发,框架,系统,示例,资料,模型,离线,外包,合肥,安徽,中国" />
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      content="火星科技 合肥火星 合肥火星科技 合肥火星科技有限公司 leaflet leaflet框架 leaflet开发 cesium cesium开发 cesium框架 三维 地球 模型  gis marsgis 地图离线 地图开发 地图框架 地图外包 框架 开发 外包  地图离线 二维地图 三维地图 全景漫游 地理信息系统 云GIS 三维GIS GIS平台 WebGIS"
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    <link rel="shortcut icon" type="image/x-icon" href="" />
    <title>ammo物理引擎扩展支持  </title>

    <script
      type="text/javascript"
      src="../lib/include-lib.js"
      libpath="../lib/"
      include="jquery,font-awesome,bootstrap,layer,haoutil,turf,mars3d,cesium-meshVisualizer"
    ></script>

    <link href="css/style.css" rel="stylesheet" />
  </head>

  <body class="dark">
    <div id="mars3dContainer" class="mars3d-container"></div>

    <!-- 面板 -->
    <div class="infoview">操作提示：鼠标左键单击进行发射</div>


    <script src="../lib/ammo/ex/ConvexObjectBreaker.js"></script>
    <script src="../lib/ammo/ex/QuickHull.js"></script>
    <script src="../lib/ammo/ex/geometries/ConvexGeometry.js"></script>

    <script src="./js/common.js"></script>
    <script type="text/javascript">
      "use script"; //开发环境建议开启严格模式

      var map;

      function initMap(options) {
        //合并属性参数，可覆盖config.json中的对应配置
        var mapOptions = mars3d.Util.merge(options, {
          scene: {
            center: { lat: 31.834317, lng: 117.2199, alt: 87, heading: 30, pitch: -29 },
            fxaa: true,
          },
        });

        //创建三维地球场景
        map = new mars3d.Map("mars3dContainer", mapOptions);

        let MeshVisualizer = Cesium.MeshVisualizer;
        let Mesh = Cesium.Mesh;
        let MeshMaterial = Cesium.MeshMaterial;
        let FramebufferTexture = Cesium.FramebufferTexture;
        let GeometryUtils = Cesium.GeometryUtils;
        let MeshPhongMaterial = Cesium.MeshPhongMaterial;
        let BasicMeshMaterial = Cesium.BasicMeshMaterial;
        let LOD = Cesium.LOD;

        var center = Cesium.Cartesian3.fromDegrees(117.220206, 31.834866, 50);
        var modelMatrix = Cesium.Transforms.eastNorthUpToFixedFrame(center);

        var meshVisualizer = new Cesium.MeshVisualizer({
          modelMatrix: modelMatrix,
          up: { y: 1 },
          referenceAxisParameter: {
            length: 100,
            width: 0.05,
            headLength: 2,
            headWidth: 0.1,
          },
        });
        map.scene.primitives.add(meshVisualizer);

        meshVisualizer.showReference = true; //显示坐标轴

        function createRandomColor() {
          return Cesium.Color.fromRandom({ alpha: 1 }); //fromRgba(Math.floor(Math.random() * (1 << 24)));
        }
        function createMaterial(color) {
          if (typeof color === "string") {
            //
          } else if (Cesium.defined(color)) {
            color = Cesium.Color.fromRgba(color).withAlpha(1);
          } else {
            color = createRandomColor();
          }
          return new MeshPhongMaterial({
            defaultColor: color,
            side: MeshMaterial.Sides.DOUBLE,
            translucent: false,
          });
        }
        var groundMaterial = new MeshPhongMaterial({
          defaultColor: "rgb(255,0,0)",
          side: MeshMaterial.Sides.DOUBLE,
          translucent: false,
        });
        Cesium.Cartesian3.prototype.set = function (x, y, z) {
          this.x = x;
          this.y = y;
          this.z = z;
        };
        Cesium.Cartesian2.prototype.set = function (x, y) {
          this.x = x;
          this.y = y;
        };
        Cesium.Quaternion.prototype.set = function (x, y, z, w) {
          this.x = x;
          this.y = y;
          this.z = z;
          this.w = w;
        };

        Ammo().then(function () {
          // - Global variables -

          // Graphics variables
          var clock = new THREE.Clock();

          var mouseCoords = new THREE.Vector2();
          var raycaster = new THREE.Raycaster();
          var ballMaterial = createMaterial(0x202020);

          // Physics variables
          var gravityConstant = 7.8;
          var collisionConfiguration;
          var dispatcher;
          var broadphase;
          var solver;
          var physicsWorld;
          var margin = 0.05;

          var convexBreaker = new THREE.ConvexObjectBreaker();

          // Rigid bodies include all movable objects
          var rigidBodies = [];

          var pos = new THREE.Vector3();
          var quat = new THREE.Quaternion();
          var transformAux1 = new Ammo.btTransform();
          var tempBtVec3_1 = new Ammo.btVector3(0, 0, 0);

          var time = 0;

          var objectsToRemove = [];
          for (var i = 0; i < 500; i++) {
            objectsToRemove[i] = null;
          }
          var numObjectsToRemove = 0;

          var impactPoint = new THREE.Vector3();
          var impactNormal = new THREE.Vector3();

          function initPhysics() {
            // Physics configuration

            collisionConfiguration = new Ammo.btDefaultCollisionConfiguration();
            dispatcher = new Ammo.btCollisionDispatcher(collisionConfiguration);
            broadphase = new Ammo.btDbvtBroadphase();
            solver = new Ammo.btSequentialImpulseConstraintSolver();
            physicsWorld = new Ammo.btDiscreteDynamicsWorld(dispatcher, broadphase, solver, collisionConfiguration);
            physicsWorld.setGravity(new Ammo.btVector3(0, -gravityConstant, 0));
          }

          function createObject(mass, halfExtents, pos, quat, material) {
            //y，z调换位置
            var object = new THREE.Mesh(new THREE.BoxGeometry(halfExtents.x * 2, halfExtents.y * 2, halfExtents.z * 2), material);
            object.position.copy(pos);
            object.quaternion.copy(quat);
            //object.position.y += 3;
            convexBreaker.prepareBreakableObject(object, mass, new THREE.Vector3(), new THREE.Vector3(), true);

            createDebrisFromBreakableObject(object);
          }

          function createObjects() {
            // Ground
            pos.set(0, -0.5, 0);
            quat.set(0, 0, 0, 1);
            var ground = createParalellepipedWithPhysics(40, 1, 40, 0, pos, quat, createMaterial(0xffffff));

            // Tower 1
            var towerMass = 1000;
            var towerHalfExtents = new THREE.Vector3(2, 5, 2);
            pos.set(-8, 5, 0);
            quat.set(0, 0, 0, 1);
            createObject(towerMass, towerHalfExtents, pos, quat, createMaterial("rgb(247,174,68)"));

            // Tower 2
            pos.set(8, 5, 0);
            quat.set(0, 0, 0, 1);
            createObject(towerMass, towerHalfExtents, pos, quat, createMaterial("rgb(247,174,68)"));

            //Bridge
            var bridgeMass = 100;
            var bridgeHalfExtents = new THREE.Vector3(7, 0.2, 1.5);
            pos.set(0, 10.2, 0);
            quat.set(0, 0, 0, 1);
            createObject(bridgeMass, bridgeHalfExtents, pos, quat, createMaterial("rgb(247,174,68)"));

            // Stones
            var stoneMass = 120;
            var stoneHalfExtents = new THREE.Vector3(1, 2, 0.15);
            var numStones = 8;
            quat.set(0, 0, 0, 1);
            for (var i = 0; i < numStones; i++) {
              pos.set(0, 2, 15 * (0.5 - i / (numStones + 1)));

              createObject(stoneMass, stoneHalfExtents, pos, quat, createMaterial(0xb0b0b0));
            }

            // Mountain
            var mountainMass = 860;
            var mountainHalfExtents = new THREE.Vector3(4, 5, 4);
            pos.set(5, mountainHalfExtents.y * 0.5, -7);
            quat.set(0, 0, 0, 1);
            var mountainPoints = [];
            //y，z调换位置
            mountainPoints.push(new THREE.Vector3(mountainHalfExtents.x, -mountainHalfExtents.y, mountainHalfExtents.z));
            mountainPoints.push(new THREE.Vector3(-mountainHalfExtents.x, -mountainHalfExtents.y, mountainHalfExtents.z));
            mountainPoints.push(new THREE.Vector3(mountainHalfExtents.x, -mountainHalfExtents.y, -mountainHalfExtents.z));
            mountainPoints.push(new THREE.Vector3(-mountainHalfExtents.x, -mountainHalfExtents.y, -mountainHalfExtents.z));
            mountainPoints.push(new THREE.Vector3(0, mountainHalfExtents.y, 0));
            var mountain = new THREE.Mesh(new THREE.ConvexGeometry(mountainPoints), createMaterial("rgb(247,174,68)"));
            mountain.position.copy(pos);
            mountain.quaternion.copy(quat);
            convexBreaker.prepareBreakableObject(mountain, mountainMass, new THREE.Vector3(), new THREE.Vector3(), true);
            createDebrisFromBreakableObject(mountain);
          }

          function createParalellepipedWithPhysics(sx, sy, sz, mass, pos, quat, material) {
            var box = Cesium.BoxGeometry.createGeometry(
              Cesium.BoxGeometry.fromDimensions({
                dimensions: new Cesium.Cartesian3(sx, sy, sz),
                vertexFormat: new Cesium.VertexFormat({
                  position: true,
                  normal: true,
                }),
              })
            );
            var object = new Cesium.Mesh(box, material);
            object.quaternion = new Cesium.Quaternion();
            var shape = new Ammo.btBoxShape(new Ammo.btVector3(sx * 0.5, sy * 0.5, sz * 0.5));
            shape.setMargin(margin);

            createRigidBody(object, shape, mass, pos, quat);

            return object;
          }

          function createDebrisFromBreakableObject(object) {
            object.castShadow = true;
            object.receiveShadow = true;

            var shape = createConvexHullPhysicsShape(object.geometry.vertices);
            shape.setMargin(margin);

            var body = createRigidBody(object, shape, object.userData.mass, null, null, object.userData.velocity, object.userData.angularVelocity);

            // Set pointer back to the three object only in the debris objects
            var btVecUserData = new Ammo.btVector3(0, 0, 0);
            btVecUserData.threeObject = object;
            body.setUserPointer(btVecUserData);
          }

          function removeDebris(object) {
            meshVisualizer.remove(object);

            physicsWorld.removeRigidBody(object.userData.physicsBody);
          }

          function createConvexHullPhysicsShape(points) {
            var shape = new Ammo.btConvexHullShape();

            for (var i = 0, il = points.length; i < il; i++) {
              var p = points[i];
              tempBtVec3_1.setValue(p.x, p.y, p.z); //y,z调换位置
              var lastOne = i === il - 1;
              shape.addPoint(tempBtVec3_1, lastOne);
            }

            return shape;
          }

          function createRigidBody(object, physicsShape, mass, pos, quat, vel, angVel) {
            if (pos) {
              object.position.copy(pos);
            } else {
              pos = object.position;
            }
            if (quat) {
              if (object.quaternion) {
                object.quaternion.copy(quat);
              }
            } else {
              quat = object.quaternion;
            }

            var transform = new Ammo.btTransform();
            transform.setIdentity();
            transform.setOrigin(new Ammo.btVector3(pos.x, pos.y, pos.z));
            transform.setRotation(new Ammo.btQuaternion(quat.x, quat.y, quat.z, quat.w));
            var motionState = new Ammo.btDefaultMotionState(transform);

            var localInertia = new Ammo.btVector3(0, 0, 0);
            physicsShape.calculateLocalInertia(mass, localInertia);

            var rbInfo = new Ammo.btRigidBodyConstructionInfo(mass, motionState, physicsShape, localInertia);
            var body = new Ammo.btRigidBody(rbInfo);

            body.setFriction(0.5);

            if (vel) {
              body.setLinearVelocity(new Ammo.btVector3(vel.x, vel.y, vel.z));
            }
            if (angVel) {
              body.setAngularVelocity(new Ammo.btVector3(angVel.x, angVel.y, angVel.z));
            }

            object.userData.physicsBody = body;
            object.userData.collided = false;

            meshVisualizer.add(object);

            if (mass > 0) {
              rigidBodies.push(object);

              // Disable deactivation
              body.setActivationState(4);
            }

            physicsWorld.addRigidBody(body);

            return body;
          }

          function updatePhysics(deltaTime) {
            // Step world
            physicsWorld.stepSimulation(deltaTime, 10);

            // Update rigid bodies
            for (let i = 0, il = rigidBodies.length; i < il; i++) {
              var objThree = rigidBodies[i];
              var objPhys = objThree.userData.physicsBody;
              var ms = objPhys.getMotionState();
              if (ms) {
                ms.getWorldTransform(transformAux1);
                var p = transformAux1.getOrigin();
                var q = transformAux1.getRotation();
                objThree.position.set(p.x(), p.y(), p.z());
                if (objThree.quaternion) {
                  objThree.quaternion.set(q.x(), q.y(), q.z(), q.w());
                }

                objThree.userData.collided = false;
                objThree.modelMatrixNeedsUpdate = true;
              }
            }

            for (let i = 0, il = dispatcher.getNumManifolds(); i < il; i++) {
              var contactManifold = dispatcher.getManifoldByIndexInternal(i);
              var rb0 = contactManifold.getBody0();
              var rb1 = contactManifold.getBody1();

              var threeObject0 = Ammo.castObject(rb0.getUserPointer(), Ammo.btVector3).threeObject;
              var threeObject1 = Ammo.castObject(rb1.getUserPointer(), Ammo.btVector3).threeObject;

              if (!threeObject0 && !threeObject1) {
                continue;
              }

              var userData0 = threeObject0 ? threeObject0.userData : null;
              var userData1 = threeObject1 ? threeObject1.userData : null;

              var breakable0 = userData0 ? userData0.breakable : false;
              var breakable1 = userData1 ? userData1.breakable : false;

              var collided0 = userData0 ? userData0.collided : false;
              var collided1 = userData1 ? userData1.collided : false;

              if ((!breakable0 && !breakable1) || (collided0 && collided1)) {
                continue;
              }

              var contact = false;
              var maxImpulse = 0;
              for (let j = 0, jl = contactManifold.getNumContacts(); j < jl; j++) {
                var contactPoint = contactManifold.getContactPoint(j);
                if (contactPoint.getDistance() < 0) {
                  contact = true;
                  var impulse = contactPoint.getAppliedImpulse();
                  if (impulse > maxImpulse) {
                    maxImpulse = impulse;
                    var pos = contactPoint.get_m_positionWorldOnB();
                    var normal = contactPoint.get_m_normalWorldOnB();
                    impactPoint.set(pos.x(), pos.y(), pos.z());
                    impactNormal.set(normal.x(), normal.y(), normal.z());
                  }
                  break;
                }
              }

              // If no point has contact, abort
              if (!contact) {
                continue;
              }

              // Subdivision

              var fractureImpulse = 250;

              if (breakable0 && !collided0 && maxImpulse > fractureImpulse) {
                let debris = convexBreaker.subdivideByImpact(threeObject0, impactPoint, impactNormal, 1, 2, 1.5);

                let numObjects = debris.length;
                for (let j = 0; j < numObjects; j++) {
                  createDebrisFromBreakableObject(debris[j]);
                }

                objectsToRemove[numObjectsToRemove++] = threeObject0;
                userData0.collided = true;
              }

              if (breakable1 && !collided1 && maxImpulse > fractureImpulse) {
                var debris = convexBreaker.subdivideByImpact(threeObject1, impactPoint, impactNormal, 1, 2, 1.5);

                var numObjects = debris.length;
                for (var j = 0; j < numObjects; j++) {
                  createDebrisFromBreakableObject(debris[j]);
                }

                objectsToRemove[numObjectsToRemove++] = threeObject1;
                userData1.collided = true;
              }
            }

            for (var i = 0; i < numObjectsToRemove; i++) {
              removeDebris(objectsToRemove[i]);
            }
            numObjectsToRemove = 0;
          }

          var ray = new Cesium.Ray();
          var clickRequest = false;
          var start = false;
          var hasInit = false;
          var startTime = new Date();
          var rayDir = new Cesium.Cartesian3();

          function initInput() {
            var scene = map.scene;
            var handler = new Cesium.ScreenSpaceEventHandler(scene.canvas);
            var lastMesh = null;
            handler.setInputAction(function (movement) {
              if (!clickRequest) {
                Cesium.Cartesian2.clone(movement.position, mouseCoords);
                clickRequest = true;
              }
            }, Cesium.ScreenSpaceEventType.LEFT_DOWN);
          }

          function processClick() {
            if (clickRequest) {
              meshVisualizer.getPickRay(mouseCoords, ray);
              if (!ray) {
                clickRequest = false;
                return;
              }
              // Creates a ball
              var ballMass = 35;
              var ballRadius = 0.4;
              var ball = new Cesium.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);
        });
      }
    </script>
  </body>
</html>