Thibaut Despoulain
50 lines
1.7 KiB
JavaScript
50 lines
1.7 KiB
JavaScript
/*
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* HexGL
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* @author Thibaut 'BKcore' Despoulain <http://bkcore.com>
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* @license This work is licensed under the Creative Commons Attribution-NonCommercial 3.0 Unported License.
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* To view a copy of this license, visit http://creativecommons.org/licenses/by-nc/3.0/.
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*/
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var bkcore = bkcore || {};
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bkcore.hexgl = bkcore.hexgl || {};
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bkcore.hexgl.CameraChase = function(opts)
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{
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this.dir = new THREE.Vector3(0,0,1);
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this.up = new THREE.Vector3(0,1,0);
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this.target = new THREE.Vector3();
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this.speedOffset = 0;
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this.speedOffsetMax = 10;
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this.speedOffsetStep = 0.05;
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this.camera = opts.camera;
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this.targetObject = opts.target;
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this.cameraCube = opts.cameraCube == undefined ? null : opts.cameraCube;
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this.yoffset = opts.yoffest == undefined ? 8.0 : opts.yoffest;
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this.zoffset = opts.zoffset == undefined ? 10.0 : opts.zoffset;
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this.viewOffset = opts.viewOffset == undefined ? 10.0 : opts.viewOffset;
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this.lerp = opts.lerp == undefined ? 0.5 : opts.lerp;
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}
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bkcore.hexgl.CameraChase.prototype.update = function(dt, ratio)
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{
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this.dir.set(0,0,1);
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this.up.set(0,1,0);
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this.targetObject.matrix.rotateAxis(this.up);
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this.targetObject.matrix.rotateAxis(this.dir);
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this.speedOffset += (this.speedOffsetMax*ratio - this.speedOffset) * Math.min(1, 0.3*dt);
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this.target.copy(this.targetObject.position);
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this.target.subSelf(this.dir.multiplyScalar(this.zoffset + this.speedOffset));
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this.target.addSelf(this.up.multiplyScalar(this.yoffset));
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this.target.y += -this.up.y + this.yoffset;
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this.camera.position.copy(this.target, this.lerp);
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this.camera.lookAt(this.dir.normalize().multiplyScalar(this.viewOffset).addSelf(this.targetObject.position));
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if(this.cameraCube != null)
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this.cameraCube.rotation.copy(this.camera.rotation);
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} |