| 1 | /**
|
|---|
| 2 | * @author WestLangley / http://github.com/WestLangley
|
|---|
| 3 | * @author zz85 / http://github.com/zz85
|
|---|
| 4 | * @author bhouston / http://exocortex.com
|
|---|
| 5 | *
|
|---|
| 6 | * Creates an arrow for visualizing directions
|
|---|
| 7 | *
|
|---|
| 8 | * Parameters:
|
|---|
| 9 | * dir - Vector3
|
|---|
| 10 | * origin - Vector3
|
|---|
| 11 | * length - Number
|
|---|
| 12 | * hex - color in hex value
|
|---|
| 13 | * headLength - Number
|
|---|
| 14 | * headWidth - Number
|
|---|
| 15 | */
|
|---|
| 16 |
|
|---|
| 17 | THREE.ArrowHelper = function ( dir, origin, length, hex, headLength, headWidth ) {
|
|---|
| 18 |
|
|---|
| 19 | // dir is assumed to be normalized
|
|---|
| 20 |
|
|---|
| 21 | THREE.Object3D.call( this );
|
|---|
| 22 |
|
|---|
| 23 | if ( hex === undefined ) hex = 0xffff00;
|
|---|
| 24 | if ( length === undefined ) length = 1;
|
|---|
| 25 | if ( headLength === undefined ) headLength = 0.2 * length;
|
|---|
| 26 | if ( headWidth === undefined ) headWidth = 0.2 * headLength;
|
|---|
| 27 |
|
|---|
| 28 | this.position = origin;
|
|---|
| 29 |
|
|---|
| 30 | var lineGeometry = new THREE.Geometry();
|
|---|
| 31 | lineGeometry.vertices.push( new THREE.Vector3( 0, 0, 0 ) );
|
|---|
| 32 | lineGeometry.vertices.push( new THREE.Vector3( 0, 1, 0 ) );
|
|---|
| 33 |
|
|---|
| 34 | this.line = new THREE.Line( lineGeometry, new THREE.LineBasicMaterial( { color: hex } ) );
|
|---|
| 35 | this.line.matrixAutoUpdate = false;
|
|---|
| 36 | this.add( this.line );
|
|---|
| 37 |
|
|---|
| 38 | var coneGeometry = new THREE.CylinderGeometry( 0, 0.5, 1, 5, 1 );
|
|---|
| 39 | coneGeometry.applyMatrix( new THREE.Matrix4().makeTranslation( 0, - 0.5, 0 ) );
|
|---|
| 40 |
|
|---|
| 41 | this.cone = new THREE.Mesh( coneGeometry, new THREE.MeshBasicMaterial( { color: hex } ) );
|
|---|
| 42 | this.cone.matrixAutoUpdate = false;
|
|---|
| 43 | this.add( this.cone );
|
|---|
| 44 |
|
|---|
| 45 | this.setDirection( dir );
|
|---|
| 46 | this.setLength( length, headLength, headWidth );
|
|---|
| 47 |
|
|---|
| 48 | };
|
|---|
| 49 |
|
|---|
| 50 | THREE.ArrowHelper.prototype = Object.create( THREE.Object3D.prototype );
|
|---|
| 51 |
|
|---|
| 52 | THREE.ArrowHelper.prototype.setDirection = function () {
|
|---|
| 53 |
|
|---|
| 54 | var axis = new THREE.Vector3();
|
|---|
| 55 | var radians;
|
|---|
| 56 |
|
|---|
| 57 | return function ( dir ) {
|
|---|
| 58 |
|
|---|
| 59 | // dir is assumed to be normalized
|
|---|
| 60 |
|
|---|
| 61 | if ( dir.y > 0.99999 ) {
|
|---|
| 62 |
|
|---|
| 63 | this.quaternion.set( 0, 0, 0, 1 );
|
|---|
| 64 |
|
|---|
| 65 | } else if ( dir.y < - 0.99999 ) {
|
|---|
| 66 |
|
|---|
| 67 | this.quaternion.set( 1, 0, 0, 0 );
|
|---|
| 68 |
|
|---|
| 69 | } else {
|
|---|
| 70 |
|
|---|
| 71 | axis.set( dir.z, 0, - dir.x ).normalize();
|
|---|
| 72 |
|
|---|
| 73 | radians = Math.acos( dir.y );
|
|---|
| 74 |
|
|---|
| 75 | this.quaternion.setFromAxisAngle( axis, radians );
|
|---|
| 76 |
|
|---|
| 77 | }
|
|---|
| 78 |
|
|---|
| 79 | };
|
|---|
| 80 |
|
|---|
| 81 | }();
|
|---|
| 82 |
|
|---|
| 83 | THREE.ArrowHelper.prototype.setLength = function ( length, headLength, headWidth ) {
|
|---|
| 84 |
|
|---|
| 85 | if ( headLength === undefined ) headLength = 0.2 * length;
|
|---|
| 86 | if ( headWidth === undefined ) headWidth = 0.2 * headLength;
|
|---|
| 87 |
|
|---|
| 88 | this.line.scale.set( 1, length, 1 );
|
|---|
| 89 | this.line.updateMatrix();
|
|---|
| 90 |
|
|---|
| 91 | this.cone.scale.set( headWidth, headLength, headWidth );
|
|---|
| 92 | this.cone.position.y = length;
|
|---|
| 93 | this.cone.updateMatrix();
|
|---|
| 94 |
|
|---|
| 95 | };
|
|---|
| 96 |
|
|---|
| 97 | THREE.ArrowHelper.prototype.setColor = function ( hex ) {
|
|---|
| 98 |
|
|---|
| 99 | this.line.material.color.setHex( hex );
|
|---|
| 100 | this.cone.material.color.setHex( hex );
|
|---|
| 101 |
|
|---|
| 102 | };
|
|---|
