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
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
|
/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtQuick3D module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
import Qt 4.7
import Qt3D 1.0
import QtQuickTest 1.0
Viewport {
id: viewport
Item3D {
id: target1
x: 5.0
}
Item3D {
id: targetNegativeXAxis
x: -5.0
}
Item3D {
id: targetUpVector
y: 5.0
}
Item3D {
id: targetExpectedUpVectorTrue
z: 5.0
}
Item3D {
id: item1
transform: LookAt {
id: lookAt1
subject: target1
}
Item3D {
id: child1
z: 5.0
}
}
Item3D {
id: itemNegativeXAxis
transform: LookAt {
id: lookAtNegativeXAxis
subject: targetNegativeXAxis
}
Item3D {
id: childNegativeXAxis
z: 5.0
}
}
Item3D {
id: itemUpVector
transform: LookAt {
id: lookAtUpVector
subject: targetUpVector
}
Item3D {
id: childUpVector
z: 5.0
}
}
Item3D {
id: itemUpVectorTrue
transform: LookAt {
id: lookAtUpVectorTrue
subject: targetUpVector
preserveUpVector: true
}
Item3D {
id: childUpVectorTrue
z: 5.0
}
}
TestCase {
name: "LookAt"
// helper functions
function vectorToString(vector) {
return "Vector3D(" + vector.x + ", " + vector.y + ", " + vector.z + ")";
}
function compareVectors(vector1, vector2, string )
{
compare(vector1.x, vector2.x, string + " x");
compare(vector1.y, vector2.y, string + " y");
compare(vector1.z, vector2.z, string + " z");
}
function test_lookAt() {
var testPosition = child1.localToWorld();
var targetPosition = target1.localToWorld();
compare(testPosition.x, targetPosition.x, "test lookAt along X axis: x");
compare(testPosition.y, targetPosition.y, "test lookAt along X axis: y");
compare(testPosition.z, targetPosition.z, "test lookAt along X axis: z");
testPosition = childNegativeXAxis.localToWorld();
targetPosition = targetNegativeXAxis.localToWorld();
compare(testPosition.x, targetPosition.x, "test negativeXAxis: x");
compare(testPosition.y, targetPosition.y, "test negativeXAxis: y");
compare(testPosition.z, targetPosition.z, "test negativeXAxis: z");
target1.x = -5.0;
target1.y = -5.0;
target1.z = -5.0;
// Adjust the child's Z offset to match the new target position
child1.z = Math.sqrt(target1.x*target1.x + target1.y*target1.y +
target1.z*target1.z);
testPosition = child1.localToWorld();
targetPosition = target1.localToWorld();
// compare is fuzzy by default
compare(testPosition.x, targetPosition.x, "test subject position change: x");
compare(testPosition.y, targetPosition.y, "test subject position change: y");
compare(testPosition.z, targetPosition.z, "test subject position change: z");
}
function test_preserveUpVector() {
compare(lookAtUpVector.preserveUpVector, false, "default preserveUpVector is false");
// Verify that the lookAt works:
var childUpVectorPosition = childUpVector.localToWorld();
var targetUpVectorPosition = targetUpVector.localToWorld();
compareVectors(childUpVectorPosition, targetUpVectorPosition, "preserveUpVector false");
var targetUpVectorPosition = targetUpVector.localToWorld();
var childUpVectorTruePosition = childUpVectorTrue.localToWorld();
var expectedUpVectorTruePosition =
targetExpectedUpVectorTrue.localToWorld();
compareVectors(childUpVectorTruePosition,
expectedUpVectorTruePosition,
"preserveUpVector true" );
// test that changing preserveUpVector works
lookAtUpVector.preserveUpVector = true;
compare(lookAtUpVector.preserveUpVector, true, "setPreserveUpVector(true)");
childUpVectorPosition = childUpVector.localToWorld();
compareVectors(childUpVectorPosition, expectedUpVectorTruePosition, "preserveUpVector set to true ");
lookAtUpVector.preserveUpVector = false;
compare(lookAtUpVector.preserveUpVector, false, "setPreserveUpVector(false)");
var childUpVectorSetFalsePosition = childUpVector.localToWorld();
compareVectors(childUpVectorSetFalsePosition,
targetUpVectorPosition,
"preserveUpVector set to false ");
return;
}
}
}
|
