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
|
/****************************************************************************
**
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt 3D Studio.
**
** $QT_BEGIN_LICENSE:BSD$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** BSD License Usage
** Alternatively, you may use this file under the terms of the BSD license
** as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of The Qt Company Ltd nor the names of its
** contributors may be used to endorse or promote products derived
** from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/
/*[[
<Property name="cameraTarget" formalName="Camera Target" type="ObjectRef" default="Scene.Layer.Camera" description="Object in scene the camera should look at" />
<Property name="startImmediately" formalName="Start Immediately?" type="Boolean" default="True" publishLevel="Advanced" description="Start immediately, or wait for\nthe Enable action to be called?" />
<Handler name="start" formalName="Start" category="CameraLookAt" description="Begin looking the target" />
<Handler name="stop" formalName="Stop" category="CameraLookAt" description="Stop looking the target" />
]]*/
import QtStudio3D.Behavior 1.0
Behavior {
//External:
property string cameraTarget
property bool startImmediately
//Internal:
property bool running: false
property var updateFunction
function start() {
running = true;
}
function stop() {
running = false;
}
onInitialize: {
if (startImmediately)
start();
}
onUpdate: {
if (!running)
return;
var targetTransform = calculateGlobalTransform(cameraTarget);
var targetSpot = targetTransform.row(3).toVector3d();
var cameraTransform = calculateGlobalTransform();
var cameraSpot = cameraTransform.row(3).toVector3d();
var matrix = calculateGlobalTransform("parent").inverted();
matrix.m41 = 0;
matrix.m42 = 0;
matrix.m43 = 0;
var rotateRay = targetSpot
.minus(cameraSpot)
.times(matrix);
var rotation = lookAt(rotateRay);
setAttributeVector("rotation", rotation);
}
function getAttributeVector(name) {
var vec = Qt.vector3d(0, 0, 0);
getAttribute(name + ".x", vec.x);
getAttribute(name + ".y", vec.y);
getAttribute(name + ".z", vec.z);
return vec;
}
function setAttributeVector(name, vec) {
setAttribute(name + ".x", vec.x);
setAttribute(name + ".y", vec.y);
setAttribute(name + ".z", vec.z);
}
}
|
