1cfd74d65d832137e20e193c960802afba73b5d38sm/* 23c1e67e433728684b5f228c5d4f3e5b1457bb271sm * Copyright (C) 2010 The Android Open Source Project 3cfd74d65d832137e20e193c960802afba73b5d38sm * 4cfd74d65d832137e20e193c960802afba73b5d38sm * Licensed under the Apache License, Version 2.0 (the "License"); 5cfd74d65d832137e20e193c960802afba73b5d38sm * you may not use this file except in compliance with the License. 6cfd74d65d832137e20e193c960802afba73b5d38sm * You may obtain a copy of the License at 7cfd74d65d832137e20e193c960802afba73b5d38sm * 8cfd74d65d832137e20e193c960802afba73b5d38sm * http://www.apache.org/licenses/LICENSE-2.0 9cfd74d65d832137e20e193c960802afba73b5d38sm * 10cfd74d65d832137e20e193c960802afba73b5d38sm * Unless required by applicable law or agreed to in writing, software 11cfd74d65d832137e20e193c960802afba73b5d38sm * distributed under the License is distributed on an "AS IS" BASIS, 12cfd74d65d832137e20e193c960802afba73b5d38sm * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13cfd74d65d832137e20e193c960802afba73b5d38sm * See the License for the specific language governing permissions and 14cfd74d65d832137e20e193c960802afba73b5d38sm * limitations under the License. 15cfd74d65d832137e20e193c960802afba73b5d38sm */ 16cfd74d65d832137e20e193c960802afba73b5d38sm 17cfd74d65d832137e20e193c960802afba73b5d38smpackage com.replica.replicaisland; 18cfd74d65d832137e20e193c960802afba73b5d38sm 19cfd74d65d832137e20e193c960802afba73b5d38sm// Simple collision detection component for objects not requiring complex collision (projectiles, etc) 20cfd74d65d832137e20e193c960802afba73b5d38smpublic class SimpleCollisionComponent extends GameComponent { 21cfd74d65d832137e20e193c960802afba73b5d38sm private Vector2 mPreviousPosition; 22cfd74d65d832137e20e193c960802afba73b5d38sm private Vector2 mCurrentPosition; 23cfd74d65d832137e20e193c960802afba73b5d38sm private Vector2 mMovementDirection; 24cfd74d65d832137e20e193c960802afba73b5d38sm private Vector2 mHitPoint; 25cfd74d65d832137e20e193c960802afba73b5d38sm private Vector2 mHitNormal; 26cfd74d65d832137e20e193c960802afba73b5d38sm 27cfd74d65d832137e20e193c960802afba73b5d38sm public SimpleCollisionComponent() { 28cfd74d65d832137e20e193c960802afba73b5d38sm super(); 29cfd74d65d832137e20e193c960802afba73b5d38sm setPhase(ComponentPhases.COLLISION_DETECTION.ordinal()); 30cfd74d65d832137e20e193c960802afba73b5d38sm mPreviousPosition = new Vector2(); 31cfd74d65d832137e20e193c960802afba73b5d38sm mCurrentPosition = new Vector2(); 32cfd74d65d832137e20e193c960802afba73b5d38sm mMovementDirection = new Vector2(); 33cfd74d65d832137e20e193c960802afba73b5d38sm mHitPoint = new Vector2(); 34cfd74d65d832137e20e193c960802afba73b5d38sm mHitNormal = new Vector2(); 35cfd74d65d832137e20e193c960802afba73b5d38sm } 36cfd74d65d832137e20e193c960802afba73b5d38sm 37cfd74d65d832137e20e193c960802afba73b5d38sm @Override 38cfd74d65d832137e20e193c960802afba73b5d38sm public void reset() { 39cfd74d65d832137e20e193c960802afba73b5d38sm mPreviousPosition.zero(); 40cfd74d65d832137e20e193c960802afba73b5d38sm mCurrentPosition.zero(); 41cfd74d65d832137e20e193c960802afba73b5d38sm mMovementDirection.zero(); 42cfd74d65d832137e20e193c960802afba73b5d38sm mHitPoint.zero(); 43cfd74d65d832137e20e193c960802afba73b5d38sm mHitNormal.zero(); 44cfd74d65d832137e20e193c960802afba73b5d38sm } 45cfd74d65d832137e20e193c960802afba73b5d38sm 46cfd74d65d832137e20e193c960802afba73b5d38sm @Override 47cfd74d65d832137e20e193c960802afba73b5d38sm public void update(float timeDelta, BaseObject parent) { 48cfd74d65d832137e20e193c960802afba73b5d38sm GameObject parentObject = (GameObject) parent; 49cfd74d65d832137e20e193c960802afba73b5d38sm 50cfd74d65d832137e20e193c960802afba73b5d38sm if (mPreviousPosition.length2() > 0.0f) { 51cfd74d65d832137e20e193c960802afba73b5d38sm mCurrentPosition.set(parentObject.getCenteredPositionX(), parentObject.getCenteredPositionY()); 52cfd74d65d832137e20e193c960802afba73b5d38sm mMovementDirection.set(mCurrentPosition); 53cfd74d65d832137e20e193c960802afba73b5d38sm mMovementDirection.subtract(mPreviousPosition); 54cfd74d65d832137e20e193c960802afba73b5d38sm if (mMovementDirection.length2() > 0.0f) { 55cfd74d65d832137e20e193c960802afba73b5d38sm final CollisionSystem collision = sSystemRegistry.collisionSystem; 56cfd74d65d832137e20e193c960802afba73b5d38sm if (collision != null) { 57cfd74d65d832137e20e193c960802afba73b5d38sm final boolean hit = collision.castRay(mPreviousPosition, mCurrentPosition, 58cfd74d65d832137e20e193c960802afba73b5d38sm mMovementDirection, mHitPoint, mHitNormal, parentObject); 59cfd74d65d832137e20e193c960802afba73b5d38sm 60cfd74d65d832137e20e193c960802afba73b5d38sm if (hit) { 61cfd74d65d832137e20e193c960802afba73b5d38sm // snap 62cfd74d65d832137e20e193c960802afba73b5d38sm final float halfWidth = parentObject.width / 2.0f; 63cfd74d65d832137e20e193c960802afba73b5d38sm final float halfHeight = parentObject.height / 2.0f; 64cfd74d65d832137e20e193c960802afba73b5d38sm if (!Utils.close(mHitNormal.x, 0.0f)) { 65cfd74d65d832137e20e193c960802afba73b5d38sm parentObject.getPosition().x = mHitPoint.x - halfWidth; 66cfd74d65d832137e20e193c960802afba73b5d38sm } 67cfd74d65d832137e20e193c960802afba73b5d38sm 68cfd74d65d832137e20e193c960802afba73b5d38sm if (!Utils.close(mHitNormal.y, 0.0f)) { 69cfd74d65d832137e20e193c960802afba73b5d38sm parentObject.getPosition().y = mHitPoint.y - halfHeight; 70cfd74d65d832137e20e193c960802afba73b5d38sm } 71cfd74d65d832137e20e193c960802afba73b5d38sm 72cfd74d65d832137e20e193c960802afba73b5d38sm final TimeSystem timeSystem = sSystemRegistry.timeSystem; 73cfd74d65d832137e20e193c960802afba73b5d38sm 74cfd74d65d832137e20e193c960802afba73b5d38sm if (timeSystem != null) { 75cfd74d65d832137e20e193c960802afba73b5d38sm float time = timeSystem.getGameTime(); 76cfd74d65d832137e20e193c960802afba73b5d38sm if (mHitNormal.x > 0.0f) { 77cfd74d65d832137e20e193c960802afba73b5d38sm parentObject.setLastTouchedLeftWallTime(time); 78cfd74d65d832137e20e193c960802afba73b5d38sm } else if (mHitNormal.x < 0.0) { 79cfd74d65d832137e20e193c960802afba73b5d38sm parentObject.setLastTouchedRightWallTime(time); 80cfd74d65d832137e20e193c960802afba73b5d38sm } 81cfd74d65d832137e20e193c960802afba73b5d38sm 82cfd74d65d832137e20e193c960802afba73b5d38sm if (mHitNormal.y > 0.0f) { 83cfd74d65d832137e20e193c960802afba73b5d38sm parentObject.setLastTouchedFloorTime(time); 84cfd74d65d832137e20e193c960802afba73b5d38sm } else if (mHitNormal.y < 0.0f) { 85cfd74d65d832137e20e193c960802afba73b5d38sm parentObject.setLastTouchedCeilingTime(time); 86cfd74d65d832137e20e193c960802afba73b5d38sm } 87cfd74d65d832137e20e193c960802afba73b5d38sm } 88cfd74d65d832137e20e193c960802afba73b5d38sm 89cfd74d65d832137e20e193c960802afba73b5d38sm parentObject.setBackgroundCollisionNormal(mHitNormal); 90cfd74d65d832137e20e193c960802afba73b5d38sm 91cfd74d65d832137e20e193c960802afba73b5d38sm } 92cfd74d65d832137e20e193c960802afba73b5d38sm } 93cfd74d65d832137e20e193c960802afba73b5d38sm } 94cfd74d65d832137e20e193c960802afba73b5d38sm } 95cfd74d65d832137e20e193c960802afba73b5d38sm 96cfd74d65d832137e20e193c960802afba73b5d38sm mPreviousPosition.set(parentObject.getCenteredPositionX(), parentObject.getCenteredPositionY()); 97cfd74d65d832137e20e193c960802afba73b5d38sm } 98cfd74d65d832137e20e193c960802afba73b5d38sm} 99