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
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
|
// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package org.chromium.chromoting;
import android.content.Context;
import android.graphics.PointF;
import android.graphics.RectF;
import android.opengl.Matrix;
/**
* Cardboard activity menu bar that contains multiple menu items.
*/
public class CardboardActivityMenuBar {
public enum MenuItemType {
HOME(R.drawable.ic_home),
VOICE_INPUT(R.drawable.ic_voice_input),
MOVE_FORWARD(R.drawable.ic_move_forward),
MOVE_BACKWARD(R.drawable.ic_move_backward);
private final int mResourceId;
MenuItemType(int resourceId) {
mResourceId = resourceId;
}
public int resourceId() {
return mResourceId;
}
}
public static final float MENU_ITEM_SIZE = 0.2f;
private final RectF mMenuBarRect;
private final CardboardActivityMenuItem[] mItems;
private float[] mModelMatrix;
private float[] mCombinedMatrix;
public CardboardActivityMenuBar(Context context) {
MenuItemType[] menuItemTypes = MenuItemType.values();
final int numItem = menuItemTypes.length;
mCombinedMatrix = new float[16];
mModelMatrix = new float[16];
final float halfMenuWidth = numItem * MENU_ITEM_SIZE / 2;
final float halfMenuHeight = MENU_ITEM_SIZE / 2;
mMenuBarRect = new RectF(-halfMenuWidth, -halfMenuHeight, halfMenuWidth, halfMenuHeight);
RectF currentRect = new RectF(-halfMenuWidth, -halfMenuHeight,
-halfMenuWidth + MENU_ITEM_SIZE, halfMenuHeight);
mItems = new CardboardActivityMenuItem[numItem];
for (int i = 0; i < numItem; i++) {
mItems[i] = new CardboardActivityMenuItem(context, menuItemTypes[i], currentRect);
currentRect.offset(MENU_ITEM_SIZE, 0);
}
}
/**
* Get menu item that user is looking at.
* Return the CardboardActivity menu item that contains the passed in coordinates or
* null if none of menu items contains the passed in coordinates.
*/
public CardboardActivityMenuItem getLookingItem(PointF lookingPosition) {
for (CardboardActivityMenuItem item : mItems) {
if (item.contains(lookingPosition)) {
return item;
}
}
return null;
}
public void draw(float[] viewMatrix, float[] projectionMatrix, PointF eyeMenuBarPosition,
float centerX, float centerY, float centerZ) {
for (CardboardActivityMenuItem item : mItems) {
Matrix.setIdentityM(mModelMatrix, 0);
Matrix.translateM(mModelMatrix, 0, item.getPosition().x + centerX,
item.getPosition().y + centerY, centerZ);
Matrix.multiplyMM(mCombinedMatrix, 0, viewMatrix, 0, mModelMatrix, 0);
Matrix.multiplyMM(mCombinedMatrix, 0, projectionMatrix, 0, mCombinedMatrix, 0);
item.draw(mCombinedMatrix, item.contains(eyeMenuBarPosition));
}
}
/**
* Return true if the passed in point is inside the menu bar.
* @param x x coordinate user is looking at.
* @param y y coordinate user is looking at.
*/
public boolean contains(PointF lookingPosition) {
return mMenuBarRect.contains(lookingPosition.x, lookingPosition.y);
}
/**
* Clean up opengl data.
*/
public void cleanup() {
for (CardboardActivityMenuItem item : mItems) {
item.clean();
}
}
}
|
