1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
|
/*
* Copyright (C) 2013 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.example.android.curvedmotion;
import java.util.ArrayList;
import java.util.Collection;
/**
* A simple Path object that holds information about the points along
* a path. The API allows you to specify a move location (which essentially
* jumps from the previous point in the path to the new one), a line location
* (which creates a line segment from the previous location) and a curve
* location (which creates a B�zier curve from the previous location).
*/
public class AnimatorPath {
// The points in the path
ArrayList<PathPoint> mPoints = new ArrayList<PathPoint>();
/**
* Move from the current path point to the new one
* specified by x and y. This will create a discontinuity if this point is
* neither the first point in the path nor the same as the previous point
* in the path.
*/
public void moveTo(float x, float y) {
mPoints.add(PathPoint.moveTo(x, y));
}
/**
* Create a straight line from the current path point to the new one
* specified by x and y.
*/
public void lineTo(float x, float y) {
mPoints.add(PathPoint.lineTo(x, y));
}
/**
* Create a quadratic B�zier curve from the current path point to the new one
* specified by x and y. The curve uses the current path location as the first anchor
* point, the control points (c0X, c0Y) and (c1X, c1Y), and (x, y) as the end anchor.
*/
public void curveTo(float c0X, float c0Y, float c1X, float c1Y, float x, float y) {
mPoints.add(PathPoint.curveTo(c0X, c0Y, c1X, c1Y, x, y));
}
/**
* Returns a Collection of PathPoint objects that describe all points in the path.
*/
public Collection<PathPoint> getPoints() {
return mPoints;
}
}
|
