1 /* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 18 package com.replica.replicaisland; 19 20 /** 21 * A component to include dynamic collision volumes (such as those produced every frame from 22 * animating sprites) in the dynamic collision world. Given a set of "attack" volumes and 23 * "vulnerability" volumes (organized such that only attack vs vulnerability intersections result 24 * in valid "hits"), this component creates a bounding volume that encompasses the set and submits 25 * it to the dynamic collision system. Including this component in a game object will allow it to 26 * send and receive hits to other game objects. 27 */ 28 public class DynamicCollisionComponent extends GameComponent { 29 private FixedSizeArray<CollisionVolume> mAttackVolumes; 30 private FixedSizeArray<CollisionVolume> mVulnerabilityVolumes; 31 private SphereCollisionVolume mBoundingVolume; 32 private HitReactionComponent mHitReactionComponent; 33 DynamicCollisionComponent()34 public DynamicCollisionComponent() { 35 super(); 36 mBoundingVolume = new SphereCollisionVolume(0.0f, 0.0f, 0.0f); 37 setPhase(ComponentPhases.FRAME_END.ordinal()); 38 reset(); 39 } 40 41 @Override reset()42 public void reset() { 43 mAttackVolumes = null; 44 mVulnerabilityVolumes = null; 45 mBoundingVolume.setCenter(Vector2.ZERO); 46 mBoundingVolume.setRadius(0.0f); 47 mHitReactionComponent = null; 48 } 49 50 @Override update(float timeDelta, BaseObject parent)51 public void update(float timeDelta, BaseObject parent) { 52 GameObjectCollisionSystem collision = sSystemRegistry.gameObjectCollisionSystem; 53 if (collision != null && mBoundingVolume.getRadius() > 0.0f) { 54 collision.registerForCollisions((GameObject)parent, mHitReactionComponent, mBoundingVolume, 55 mAttackVolumes, mVulnerabilityVolumes); 56 } 57 } 58 setHitReactionComponent(HitReactionComponent component)59 public void setHitReactionComponent(HitReactionComponent component) { 60 mHitReactionComponent = component; 61 } 62 setCollisionVolumes(FixedSizeArray<CollisionVolume> attackVolumes, FixedSizeArray<CollisionVolume> vulnerableVolumes)63 public void setCollisionVolumes(FixedSizeArray<CollisionVolume> attackVolumes, 64 FixedSizeArray<CollisionVolume> vulnerableVolumes) { 65 if (mVulnerabilityVolumes != vulnerableVolumes || mAttackVolumes != attackVolumes) { 66 mAttackVolumes = attackVolumes; 67 mVulnerabilityVolumes = vulnerableVolumes; 68 mBoundingVolume.reset(); 69 if (mAttackVolumes != null) { 70 final int count = mAttackVolumes.getCount(); 71 for (int x = 0; x < count; x++) { 72 mBoundingVolume.growBy(mAttackVolumes.get(x)); 73 } 74 } 75 76 if (mVulnerabilityVolumes != null) { 77 final int count = mVulnerabilityVolumes.getCount(); 78 for (int x = 0; x < count; x++) { 79 mBoundingVolume.growBy(mVulnerabilityVolumes.get(x)); 80 } 81 } 82 } 83 } 84 } 85