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
17package com.replica.replicaisland;
18
19
20/**
21 * A game component that implements velocity-based movement.
22 */
23public class MovementComponent extends GameComponent {
24    // If multiple game components were ever running in different threads, this would need
25    // to be non-static.
26    private static Interpolator sInterpolator = new Interpolator();
27
28    public MovementComponent() {
29        super();
30        setPhase(ComponentPhases.MOVEMENT.ordinal());
31    }
32
33    @Override
34    public void reset() {
35
36    }
37
38    @Override
39    public void update(float timeDelta, BaseObject parent) {
40        GameObject object = (GameObject) parent;
41
42        sInterpolator.set(object.getVelocity().x, object.getTargetVelocity().x,
43                object.getAcceleration().x);
44        float offsetX = sInterpolator.interpolate(timeDelta);
45        float newX = object.getPosition().x + offsetX;
46        float newVelocityX = sInterpolator.getCurrent();
47
48        sInterpolator.set(object.getVelocity().y, object.getTargetVelocity().y,
49                object.getAcceleration().y);
50        float offsetY = sInterpolator.interpolate(timeDelta);
51        float newY = object.getPosition().y + offsetY;
52        float newVelocityY = sInterpolator.getCurrent();
53
54        if (object.positionLocked == false) {
55            object.getPosition().set(newX, newY);
56        }
57
58        object.getVelocity().set(newVelocityX, newVelocityY);
59    }
60
61}
62