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
|
/*
* Copyright 2010, 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.
*/
/**
* A TreeTraversal has multiple DrawLists registered with it. Each DrawList has
* a DrawContext registered with it. At render time the TreeTraversal walks the
* transform graph from the transform it's pointing at and for each DrawElement
* it finds who's matertial matches one of its registered DrawLists it adds that
* DrawElement to that DrawList.
*
* @param {o3d.Transform} opt_transform The root transform to start traversing
* by this TreeTraveral.
* @constructor
*/
o3d.TreeTraversal = function(opt_transform) {
o3d.RenderNode.call(this);
/**
* The root Transform this TreeTraversal will start traversing from.
*/
this.transform = opt_transform || null;
/**
* Private list of registered drawlists.
* @private
*/
this.drawLists_ = [];
/**
* Private list of drawlists to reset at render-time before traversal.
* @private
*/
this.drawListsToReset_ = [];
};
o3d.inherit('TreeTraversal', 'RenderNode');
o3d.ParamObject.setUpO3DParam_(o3d.TreeTraversal,
'transform', 'ParamTransform');
/**
* Registers a DrawList with this TreeTraversal so that when this
* TreeTraversal traverses its tree, DrawElements using materials that use
* this DrawList will be added though possibly culled by the view frustum of
* the DrawContext. Note: passing in the same DrawList more than once will
* override the previous settings for that DrawList.
* @param {o3d.DrawList} draw_list DrawList to register.
* @param {o3d.DrawContext} draw_context DrawContext to use with the DrawList.
* @param {boolean} reset true if you want the DrawList reset before
* traversing.
*/
o3d.TreeTraversal.prototype.registerDrawList =
function(draw_list, draw_context, reset) {
if (reset == undefined || reset) {
this.drawListsToReset_.push(draw_list);
}
this.drawLists_.push({
list:draw_list,
context:draw_context});
};
/**
* Unregisters a DrawList with this TreeTraversal.
* @param {o3d.DrawList} draw_list DrawList to unregister.
* @return {boolean} true if unregistered. false if this draw_list was
* not registered.
*/
o3d.TreeTraversal.prototype.unregisterDrawList =
function(draw_list) {
o3d.notImplemented();
};
/**
* Called in the render graph traversal before the children are rendered.
*/
o3d.TreeTraversal.prototype.before =
function() {
for(var i = 0; i < this.drawListsToReset_.length; ++i) {
this.drawListsToReset_[i].list_ = [];
}
this.transform.traverse(this.drawLists_);
};
|
