mirror of
https://github.com/wahyd4/three.js.git
synced 2026-08-13 23:16:07 +10:00
Mr.doob
1a115ae86f
Object3D::lookAt works! (and Vector3.setRotationFromMatrix too!) Next: Object3D::translate...
125 lines
2.0 KiB
JavaScript
125 lines
2.0 KiB
JavaScript
/**
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* @author mikael emtinger / http://gomo.se/
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*/
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THREE.LOD = function() {
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THREE.Object3D.call( this );
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this.LODs = [];
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};
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THREE.LOD.prototype = new THREE.Object3D();
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THREE.LOD.prototype.constructor = THREE.LOD;
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THREE.LOD.prototype.supr = THREE.Object3D.prototype;
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/*
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* Add
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*/
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THREE.LOD.prototype.add = function ( object3D, visibleAtDistance ) {
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if ( visibleAtDistance === undefined ) {
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visibleAtDistance = 0;
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}
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visibleAtDistance = Math.abs( visibleAtDistance );
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for ( var l = 0; l < this.LODs.length; l++ ) {
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if ( visibleAtDistance < this.LODs[ l ].visibleAtDistance ) {
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break;
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}
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}
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this.LODs.splice( l, 0, { visibleAtDistance: visibleAtDistance, object3D: object3D } );
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this.addChild( object3D );
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};
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/*
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* Update
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*/
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THREE.LOD.prototype.update = function ( parentMatrixWorld, forceUpdate, camera ) {
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// update local
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if ( this.matrixAutoUpdate ) {
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forceUpdate |= this.updateMatrix();
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}
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// update global
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if ( forceUpdate || this.matrixWorldNeedsUpdate ) {
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if ( parentMatrixWorld ) {
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this.matrixWorld.multiply( parentMatrixWorld, this.matrix );
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} else {
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this.matrixWorld.copy( this.matrix );
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}
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this.matrixWorldNeedsUpdate = false;
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forceUpdate = true;
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}
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// update LODs
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if ( this.LODs.length > 1 ) {
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var inverse = camera.matrixWorldInverse;
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var radius = this.boundRadius * this.boundRadiusScale;
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var distance = -( inverse.n31 * this.position.x + inverse.n32 * this.position.y + inverse.n33 * this.position.z + inverse.n34 );
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this.LODs[ 0 ].object3D.visible = true;
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for ( var l = 1; l < this.LODs.length; l++ ) {
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if( distance >= this.LODs[ l ].visibleAtDistance ) {
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this.LODs[ l - 1 ].object3D.visible = false;
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this.LODs[ l ].object3D.visible = true;
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} else {
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break;
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}
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}
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for( ; l < this.LODs.length; l++ ) {
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this.LODs[ l ].object3D.visible = false;
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}
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}
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// update children
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for ( var c = 0; c < this.children.length; c++ ) {
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this.children[ c ].update( this.matrixWorld, forceUpdate, camera );
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}
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};
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