116 lines
3.9 KiB
JavaScript
116 lines
3.9 KiB
JavaScript
/**
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*
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* @param id
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* @param name
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* @param targetEntity
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* @param targetOffset
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* @param rotationSpeed
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* @constructor
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*/
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GameLib.D3.ComponentLookAt = function ComponentLookAt(
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id,
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name,
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targetEntity,
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targetOffset,
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rotationSpeed
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) {
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this.id = id || GameLib.D3.Tools.RandomId();
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if (typeof name == 'undefined') {
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name = this.constructor.name;
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}
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this.name = name;
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this.parentEntity = null;
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// Todo: this should be executed somewhere in game-lib-z, so that we don't execute it on every construction of an object.
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GameLib.D3.Utils.Extend(GameLib.D3.ComponentLookAt, GameLib.D3.ComponentInterface);
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// todo: USE TARGET OFFSET.
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this.targetEntity = targetEntity;
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if(GameLib.D3.Utils.UndefinedOrNull(targetOffset)) {
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targetOffset = new GameLib.D3.Vector3(0, 0, 0);
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}
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this.targetOffset = targetOffset;
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this.lastTargetQuaternion = new GameLib.D3.Vector4(0, 0, 0, 1);
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this.rotationSpeed = rotationSpeed || 22.0;
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};
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if(typeof THREE != "undefined") {
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ComponentLookAt_rotatedTargetOffset = new THREE.Vector3();
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ComponentLookAt_currentPos = new THREE.Vector3();
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ComponentLookAt_targetPos = new THREE.Vector3();
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ComponentLookAt_upVector = new THREE.Vector3(0, 1, 0);
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ComponentLookAt_targetQuaternion = new THREE.Quaternion(0, 0, 0, 1);
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ComponentLookAt_tmpQuaternion = new THREE.Quaternion(0, 0, 0, 1);
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ComponentLookAt_newRotationQuaternion = new THREE.Quaternion(0, 0, 0, 1);
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ComponentLookAt_lastRotationQuaternion = new THREE.Quaternion(0, 0, 0, 1);
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ComponentLookAt_lookAtMatrix = new THREE.Matrix4();
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}
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///////////////////////// Methods to override //////////////////////////
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GameLib.D3.ComponentLookAt.prototype.onUpdate = function(
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deltaTime,
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parentEntity
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) {
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if(this.targetEntity) {
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var target = this.targetEntity.position;
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ComponentLookAt_currentPos.set(
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parentEntity.position.x,
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parentEntity.position.y,
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parentEntity.position.z
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);
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ComponentLookAt_lastRotationQuaternion.set(
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this.lastTargetQuaternion.x,
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this.lastTargetQuaternion.y,
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this.lastTargetQuaternion.z,
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this.lastTargetQuaternion.w
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);
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ComponentLookAt_rotatedTargetOffset.set(
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this.targetOffset.x,
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this.targetOffset.y,
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this.targetOffset.z
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);
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ComponentLookAt_targetQuaternion.set(
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this.targetEntity.quaternion.x,
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this.targetEntity.quaternion.y,
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this.targetEntity.quaternion.z,
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this.targetEntity.quaternion.w
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);
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ComponentLookAt_rotatedTargetOffset =
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ComponentLookAt_rotatedTargetOffset.applyQuaternion(
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ComponentLookAt_targetQuaternion
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);
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ComponentLookAt_targetPos.set(
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target.x + ComponentLookAt_rotatedTargetOffset.x,
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target.y + ComponentLookAt_rotatedTargetOffset.y,
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target.z + ComponentLookAt_rotatedTargetOffset.z
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);
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ComponentLookAt_lookAtMatrix.lookAt(
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ComponentLookAt_currentPos,
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ComponentLookAt_targetPos,
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ComponentLookAt_upVector
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);
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ComponentLookAt_tmpQuaternion.setFromRotationMatrix(ComponentLookAt_lookAtMatrix);
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var t = deltaTime * this.rotationSpeed;
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t = t * t * t * (t * (6.0 * t - 15.0) + 10.0);
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THREE.Quaternion.slerp(ComponentLookAt_lastRotationQuaternion, ComponentLookAt_tmpQuaternion, ComponentLookAt_newRotationQuaternion, t);
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this.parentEntity.quaternion.x = this.lastTargetQuaternion.x = ComponentLookAt_newRotationQuaternion.x;
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this.parentEntity.quaternion.y = this.lastTargetQuaternion.y = ComponentLookAt_newRotationQuaternion.y;
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this.parentEntity.quaternion.z = this.lastTargetQuaternion.z = ComponentLookAt_newRotationQuaternion.z;
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this.parentEntity.quaternion.w = this.lastTargetQuaternion.w = ComponentLookAt_newRotationQuaternion.w;
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}
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}; |