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
|
/*
* Copyright 2009, Google Inc.
* All rights reserved.
*
* 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 Google Inc. 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.
*/
/**
* The Orbit tool allows the user to look around the model by click-dragging.
* The shift key enters a pan mode instead of orbiting.
*/
function OrbitTool(camera) {
this.camera = camera;
this.lastOffset = null;
this.mouseLeftDown = false;
this.mouseMiddleDown = false;
}
OrbitTool.prototype.handleMouseDown = function(e) {
this.lastOffset = { x: e.x, y: e.y };
if (e.button == g_o3d.Event.BUTTON_LEFT) {
this.mouseLeftDown = true;
} else if (e.button == g_o3d.Event.BUTTON_MIDDLE) {
this.mouseMiddleDown = true;
}
};
OrbitTool.prototype.handleMouseMove = function(e) {
if (e.x !== undefined && (this.mouseLeftDown || this.mouseMiddleDown)) {
var offset = { x: e.x, y: e.y };
dY = (offset.y - this.lastOffset.y);
dX = (offset.x - this.lastOffset.x);
this.lastOffset = offset;
panInsteadOfOrbit = (this.mouseLeftDown && this.mouseMiddleDown) ||
e.shiftKey;
if (panInsteadOfOrbit) {
dX *= -1;
this.camera.target.x -= (dY * Math.cos(this.camera.eye.rotZ) +
dX * Math.sin(this.camera.eye.rotZ)) /
(700 / this.camera.eye.distanceFromTarget);
this.camera.target.y += (-dY * Math.sin(this.camera.eye.rotZ) +
dX * Math.cos(this.camera.eye.rotZ)) /
(700 / this.camera.eye.distanceFromTarget);
} else {
this.camera.eye.rotZ -= dX / 300;
this.camera.eye.rotH -= dY / 300;
this.camera.eye.rotH = peg(this.camera.eye.rotH, 0.1, Math.PI - 0.1);
document.getElementById('output').innerHTML = this.camera.eye.rotH;
}
this.camera.update();
}
};
OrbitTool.prototype.handleMouseUp = function(e) {
if (e.button == g_o3d.Event.BUTTON_LEFT) {
this.mouseLeftDown = false;
} else if (e.button == g_o3d.Event.BUTTON_MIDDLE) {
this.mouseMiddleDown = false;
}
};
OrbitTool.prototype.handleKeyDown = function(e) {
return false;
};
OrbitTool.prototype.handleKeyUp = function(e) {
return false;
};
|
