three
Version:
JavaScript 3D library
343 lines (204 loc) • 8.32 kB
JavaScript
/**
* @author mrdoob / http://mrdoob.com/
* @author alteredq / http://alteredqualia.com/
* @author mikael emtinger / http://gomo.se/
* @author jonobr1 / http://jonobr1.com/
*/
THREE.Mesh = function ( geometry, material ) {
THREE.Object3D.call( this );
this.type = 'Mesh';
this.geometry = geometry !== undefined ? geometry : new THREE.BufferGeometry();
this.material = material !== undefined ? material : new THREE.MeshBasicMaterial( { color: Math.random() * 0xffffff } );
this.drawMode = THREE.TrianglesDrawMode;
this.updateMorphTargets();
};
THREE.Mesh.prototype = Object.assign( Object.create( THREE.Object3D.prototype ), {
constructor: THREE.Mesh,
setDrawMode: function ( value ) {
this.drawMode = value;
},
updateMorphTargets: function () {
if ( this.geometry.morphTargets !== undefined && this.geometry.morphTargets.length > 0 ) {
this.morphTargetBase = - 1;
this.morphTargetInfluences = [];
this.morphTargetDictionary = {};
for ( var m = 0, ml = this.geometry.morphTargets.length; m < ml; m ++ ) {
this.morphTargetInfluences.push( 0 );
this.morphTargetDictionary[ this.geometry.morphTargets[ m ].name ] = m;
}
}
},
getMorphTargetIndexByName: function ( name ) {
if ( this.morphTargetDictionary[ name ] !== undefined ) {
return this.morphTargetDictionary[ name ];
}
console.warn( 'THREE.Mesh.getMorphTargetIndexByName: morph target ' + name + ' does not exist. Returning 0.' );
return 0;
},
raycast: ( function () {
var inverseMatrix = new THREE.Matrix4();
var ray = new THREE.Ray();
var sphere = new THREE.Sphere();
var vA = new THREE.Vector3();
var vB = new THREE.Vector3();
var vC = new THREE.Vector3();
var tempA = new THREE.Vector3();
var tempB = new THREE.Vector3();
var tempC = new THREE.Vector3();
var uvA = new THREE.Vector2();
var uvB = new THREE.Vector2();
var uvC = new THREE.Vector2();
var barycoord = new THREE.Vector3();
var intersectionPoint = new THREE.Vector3();
var intersectionPointWorld = new THREE.Vector3();
function uvIntersection( point, p1, p2, p3, uv1, uv2, uv3 ) {
THREE.Triangle.barycoordFromPoint( point, p1, p2, p3, barycoord );
uv1.multiplyScalar( barycoord.x );
uv2.multiplyScalar( barycoord.y );
uv3.multiplyScalar( barycoord.z );
uv1.add( uv2 ).add( uv3 );
return uv1.clone();
}
function checkIntersection( object, raycaster, ray, pA, pB, pC, point ) {
var intersect;
var material = object.material;
if ( material.side === THREE.BackSide ) {
intersect = ray.intersectTriangle( pC, pB, pA, true, point );
} else {
intersect = ray.intersectTriangle( pA, pB, pC, material.side !== THREE.DoubleSide, point );
}
if ( intersect === null ) return null;
intersectionPointWorld.copy( point );
intersectionPointWorld.applyMatrix4( object.matrixWorld );
var distance = raycaster.ray.origin.distanceTo( intersectionPointWorld );
if ( distance < raycaster.near || distance > raycaster.far ) return null;
return {
distance: distance,
point: intersectionPointWorld.clone(),
object: object
};
}
function checkBufferGeometryIntersection( object, raycaster, ray, positions, uvs, a, b, c ) {
vA.fromArray( positions, a * 3 );
vB.fromArray( positions, b * 3 );
vC.fromArray( positions, c * 3 );
var intersection = checkIntersection( object, raycaster, ray, vA, vB, vC, intersectionPoint );
if ( intersection ) {
if ( uvs ) {
uvA.fromArray( uvs, a * 2 );
uvB.fromArray( uvs, b * 2 );
uvC.fromArray( uvs, c * 2 );
intersection.uv = uvIntersection( intersectionPoint, vA, vB, vC, uvA, uvB, uvC );
}
intersection.face = new THREE.Face3( a, b, c, THREE.Triangle.normal( vA, vB, vC ) );
intersection.faceIndex = a;
}
return intersection;
}
return function raycast( raycaster, intersects ) {
var geometry = this.geometry;
var material = this.material;
var matrixWorld = this.matrixWorld;
if ( material === undefined ) return;
// Checking boundingSphere distance to ray
if ( geometry.boundingSphere === null ) geometry.computeBoundingSphere();
sphere.copy( geometry.boundingSphere );
sphere.applyMatrix4( matrixWorld );
if ( raycaster.ray.intersectsSphere( sphere ) === false ) return;
//
inverseMatrix.getInverse( matrixWorld );
ray.copy( raycaster.ray ).applyMatrix4( inverseMatrix );
// Check boundingBox before continuing
if ( geometry.boundingBox !== null ) {
if ( ray.intersectsBox( geometry.boundingBox ) === false ) return;
}
var uvs, intersection;
if ( geometry instanceof THREE.BufferGeometry ) {
var a, b, c;
var index = geometry.index;
var attributes = geometry.attributes;
var positions = attributes.position.array;
if ( attributes.uv !== undefined ) {
uvs = attributes.uv.array;
}
if ( index !== null ) {
var indices = index.array;
for ( var i = 0, l = indices.length; i < l; i += 3 ) {
a = indices[ i ];
b = indices[ i + 1 ];
c = indices[ i + 2 ];
intersection = checkBufferGeometryIntersection( this, raycaster, ray, positions, uvs, a, b, c );
if ( intersection ) {
intersection.faceIndex = Math.floor( i / 3 ); // triangle number in indices buffer semantics
intersects.push( intersection );
}
}
} else {
for ( var i = 0, l = positions.length; i < l; i += 9 ) {
a = i / 3;
b = a + 1;
c = a + 2;
intersection = checkBufferGeometryIntersection( this, raycaster, ray, positions, uvs, a, b, c );
if ( intersection ) {
intersection.index = a; // triangle number in positions buffer semantics
intersects.push( intersection );
}
}
}
} else if ( geometry instanceof THREE.Geometry ) {
var fvA, fvB, fvC;
var isFaceMaterial = material instanceof THREE.MultiMaterial;
var materials = isFaceMaterial === true ? material.materials : null;
var vertices = geometry.vertices;
var faces = geometry.faces;
var faceVertexUvs = geometry.faceVertexUvs[ 0 ];
if ( faceVertexUvs.length > 0 ) uvs = faceVertexUvs;
for ( var f = 0, fl = faces.length; f < fl; f ++ ) {
var face = faces[ f ];
var faceMaterial = isFaceMaterial === true ? materials[ face.materialIndex ] : material;
if ( faceMaterial === undefined ) continue;
fvA = vertices[ face.a ];
fvB = vertices[ face.b ];
fvC = vertices[ face.c ];
if ( faceMaterial.morphTargets === true ) {
var morphTargets = geometry.morphTargets;
var morphInfluences = this.morphTargetInfluences;
vA.set( 0, 0, 0 );
vB.set( 0, 0, 0 );
vC.set( 0, 0, 0 );
for ( var t = 0, tl = morphTargets.length; t < tl; t ++ ) {
var influence = morphInfluences[ t ];
if ( influence === 0 ) continue;
var targets = morphTargets[ t ].vertices;
vA.addScaledVector( tempA.subVectors( targets[ face.a ], fvA ), influence );
vB.addScaledVector( tempB.subVectors( targets[ face.b ], fvB ), influence );
vC.addScaledVector( tempC.subVectors( targets[ face.c ], fvC ), influence );
}
vA.add( fvA );
vB.add( fvB );
vC.add( fvC );
fvA = vA;
fvB = vB;
fvC = vC;
}
intersection = checkIntersection( this, raycaster, ray, fvA, fvB, fvC, intersectionPoint );
if ( intersection ) {
if ( uvs ) {
var uvs_f = uvs[ f ];
uvA.copy( uvs_f[ 0 ] );
uvB.copy( uvs_f[ 1 ] );
uvC.copy( uvs_f[ 2 ] );
intersection.uv = uvIntersection( intersectionPoint, fvA, fvB, fvC, uvA, uvB, uvC );
}
intersection.face = face;
intersection.faceIndex = f;
intersects.push( intersection );
}
}
}
};
}() ),
clone: function () {
return new this.constructor( this.geometry, this.material ).copy( this );
}
} );