javascript - 将对象从 BoxBufferGeometry 更改为 BufferGeometry 时，弹药 js 中的 enableAngularMotor 似乎不起作用
问题描述
我正在使用 three.js 和 ammo.js 创建弹球游戏，并且在使用从加载的 GLTF 文件克隆的 bufferGeometry 时使用 enableAngularMotor 旋转鳍状肢时遇到问题，而使用 BoxBufferGeometry 的相同代码可以正常工作。
在最初的测试版本中，我有一个与铰链相连的 threejs BoxBufferGeometry 块，并且可以正常工作。我已经将代码转移到了 three.js 中 gltf 加载器上的加载回调，并且来自新的更好模型克隆的几何可以正常读取，但是相同的铰链接线代码似乎没有旋转鳍状肢。
var loader = new THREE.GLTFLoader();
let mass = ms;
loader.load(whichFile,function ( gltf ) {
gltf.animations; // Array<THREE.AnimationClip>
gltf.scene; // THREE.Scene
gltf.scenes; // Array<THREE.Scene>
gltf.cameras; // Array<THREE.Camera>
gltf.asset; // Object
gltf.scene.scale.set(Size[0],Size[1],Size[2]);
gltf.scene.position.set(Pos[0],Pos[1],Pos[2]);
gltf.asset.castShadow = true;
gltf.asset.receiveShadow = true;
gltf.scene.traverse(function (child) {
if (child.isMesh) {
child.castShadow = true;
child.receiveShadow = true;
let geometry = new THREE.Geometry().fromBufferGeometry( child.geometry );
let qCircX = new THREE.Mesh(geometry, child.material);
//scene.add(qCircX);
qCircX.scale.set(Size[0],Size[1],Size[2]);
qCircX.position.set(Pos[0],Pos[1],Pos[2]);
geometry.computeFaceNormals();
geometry.mergeVertices();
geometry.computeVertexNormals();
child.geometry = new THREE.BufferGeometry().fromGeometry( geometry );
let qCirc = new THREE.Mesh(child.geometry, child.material);
qCirc.scale.set(Size[0],Size[1],Size[2]);
qCirc.position.set(Pos[0],Pos[1],Pos[2]);
qCirc.castShadow = true;
qCirc.receiveShadow = true;
scene.add(qCirc);
let transform = new Ammo.btTransform();
transform.setIdentity();
transform.setOrigin( new Ammo.btVector3( Pos[0],Pos[1],Pos[2] ) );
let motionState = new Ammo.btDefaultMotionState( transform );
let vertices, face, triangles = [];
vertices = geometry.vertices;
vertices = generateVertexMesh(geometry, vertices, triangles);
let i, triangle, triangle_mesh = new Ammo.btTriangleMesh;
let _vec3_1 = new Ammo.btVector3(0,0,0);
let _vec3_2 = new Ammo.btVector3(0,0,0);
let _vec3_3 = new Ammo.btVector3(0,0,0);
for ( i = 0; i < triangles.length; i++ ) {
triangle = triangles[i];
_vec3_1.setX(triangle[0].x);
_vec3_1.setY(triangle[0].y);
_vec3_1.setZ(triangle[0].z);
_vec3_2.setX(triangle[1].x);
_vec3_2.setY(triangle[1].y);
_vec3_2.setZ(triangle[1].z);
_vec3_3.setX(triangle[2].x);
_vec3_3.setY(triangle[2].y);
_vec3_3.setZ(triangle[2].z);
triangle_mesh.addTriangle(
_vec3_1,
_vec3_2,
_vec3_3,
true
);
}
let colSurround = new Ammo.btBvhTriangleMeshShape( triangle_mesh, true, true );
let localInertia = new Ammo.btVector3( 0, 0, 0 );
colSurround.calculateLocalInertia( mass, localInertia );
let rbInfo = new Ammo.btRigidBodyConstructionInfo( mass, motionState, colSurround, localInertia );
let body = new Ammo.btRigidBody( rbInfo );
body.setRestitution(rest);
qCirc.userData.physicsBody = body;
qCirc.name = objName;
collidableMeshList.push(qCirc);
if(addToScoreColliders){
scoreList.push(objName);
}
//console.log(ballArray);
if ( mass > 0 ) {
rigidBodies.push( qCirc );
//console.log(rigidBodies);
body.setActivationState( 4 );
}
physicsWorld.addRigidBody( body );
if(objName == "flipperL"){
let pos = {x:-16,y:0,z:27}, posBumper = {x:0,y:0,z:0}, scaleHinge = {x:1,y:1,z:1}, scaleBumper = {x:1,y:1,z:1}, quat = {x:0,y:0,z:0,w:1}, quatBumper = {x:0,y:0,z:0,w:1}, mass = 0, massBumper = 9;
// create the hinge and bumper objects
leftHinge = createPhysicsGeometry(0xff0000,pos,scaleHinge,quat,mass,"leftHinge",0,[0,0], true);
// Hinge constraint to move the bumper
let pivotA = new Ammo.btVector3( 0, 0.5, 0 ),pivotB = new Ammo.btVector3( -1.5, -3, 0 ),axis = new Ammo.btVector3( 0, 1, 0 );
leftHingeConstraint = new Ammo.btHingeConstraint( leftHinge.userData.physicsBody, qCirc.userData.physicsBody, pivotA, pivotB, axis, axis, true );
leftHingeConstraint.setLimit(0, Math.PI/2 * 0.5, 0.9, 0.3, 1);
physicsWorld.addConstraint( leftHingeConstraint, true );
leftHingeActive = true;
bumperGeoms[0] = qCirc;
}
if(objName == "flipperR"){
let pos = {x:16,y:0,z:27}, posBumper = {x:0,y:0,z:0}, scaleHinge = {x:1,y:1,z:1}, scaleBumper = {x:1,y:1,z:1}, quat = {x:0, y:0, z:0, w: 1},quatBumper = {x:0,y:0,z:0,w:1}, mass = 0, massBumper = 9;
// create the hinge and bumper objects
rightHinge = createPhysicsGeometry(0xff0000,pos,scaleHinge,quat,mass,"rightHinge",0,[0,0], true);
// Hinge constraint to move the bumper
let pivotA = new Ammo.btVector3( 0, 0.5, 0 ),pivotB = new Ammo.btVector3( 1.5, -3, 0 ),axis = new Ammo.btVector3( 0, 1, 0 );
//console.log(bumperArray);
rightHingeConstraint = new Ammo.btHingeConstraint( rightHinge.userData.physicsBody, qCirc.userData.physicsBody, pivotA, pivotB, axis, axis, true );
rightHingeConstraint.setLimit(-Math.PI/2 * 0.5, 0, 0.9, 0.3, 1);
physicsWorld.addConstraint( rightHingeConstraint, true );
rightHingeActive = true;
bumperGeoms[1] = qCirc;
}
}
});
},
// called while loading is progressing
function ( xhr ) {
console.log( ( xhr.loaded / xhr.total * 100 ) + '% loaded' );
},
// called when loading has errors
function ( error ) {
console.log( 'An error happened : ' + error );
});
}```
When an area of the screen is pressed, the angular motor is enabled with a multiplier to turn the flipper, whereas now the flipper doesn't rotate. I don't get any errors logging to the console, and logging geometry to check it's loaded ok is fine.
解决方案
好的，所以我采用了另一种方法，使 gltf 场景成为现有简单长方体鳍状肢的孩子。
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