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
|
//
// Filename : ArbitraryGridDensityProvider.cpp
// Author(s) : Alexander Beels
// Purpose : Class to define a cell grid surrounding
// the projected image of a scene
// Date of creation : 2011-2-5
//
///////////////////////////////////////////////////////////////////////////////
//
// Copyright (C) : Please refer to the COPYRIGHT file distributed
// with this source distribution.
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
///////////////////////////////////////////////////////////////////////////////
#include "ArbitraryGridDensityProvider.h"
ArbitraryGridDensityProvider::ArbitraryGridDensityProvider(OccluderSource& source, const real proscenium[4], unsigned numCells)
: GridDensityProvider(source), numCells(numCells)
{
initialize (proscenium);
}
ArbitraryGridDensityProvider::ArbitraryGridDensityProvider(OccluderSource& source, const BBox<Vec3r>& bbox, const GridHelpers::Transform& transform, unsigned numCells)
: GridDensityProvider(source), numCells(numCells)
{
real proscenium[4];
calculateQuickProscenium(transform, bbox, proscenium);
initialize (proscenium);
}
ArbitraryGridDensityProvider::ArbitraryGridDensityProvider(OccluderSource& source, unsigned numCells)
: GridDensityProvider(source), numCells(numCells)
{
real proscenium[4];
calculateOptimalProscenium(source, proscenium);
initialize (proscenium);
}
ArbitraryGridDensityProvider::~ArbitraryGridDensityProvider () {}
void ArbitraryGridDensityProvider::initialize (const real proscenium[4])
{
float prosceniumWidth = (proscenium[1] - proscenium[0]);
float prosceniumHeight = (proscenium[3] - proscenium[2]);
real cellArea = prosceniumWidth * prosceniumHeight / numCells;
cout << prosceniumWidth << " x " << prosceniumHeight << " grid with cells of area " << cellArea << "." << endl;
_cellSize = sqrt(cellArea);
// Now we know how many cells make each side of our grid
_cellsX = ceil(prosceniumWidth / _cellSize);
_cellsY = ceil(prosceniumHeight / _cellSize);
cout << _cellsX << "x" << _cellsY << " cells of size " << _cellSize << " square." << endl;
// Make sure the grid exceeds the proscenium by a small amount
float safetyZone = 0.1;
if ( _cellsX * _cellSize < prosceniumWidth * (1.0 + safetyZone) ) {
_cellsX = prosceniumWidth * (1.0 + safetyZone) / _cellSize;
}
if ( _cellsY * _cellSize < prosceniumHeight * (1.0 + safetyZone) ) {
_cellsY = prosceniumHeight * (1.0 + safetyZone) / _cellSize;
}
cout << _cellsX << "x" << _cellsY << " cells of size " << _cellSize << " square." << endl;
// Find grid origin
_cellOrigin[0] = ((proscenium[0] + proscenium[1]) / 2.0) - (_cellsX / 2.0) * _cellSize;
_cellOrigin[1] = ((proscenium[2] + proscenium[3]) / 2.0) - (_cellsY / 2.0) * _cellSize;
}
ArbitraryGridDensityProviderFactory::ArbitraryGridDensityProviderFactory(unsigned numCells)
: numCells(numCells)
{
}
ArbitraryGridDensityProviderFactory::~ArbitraryGridDensityProviderFactory () {}
auto_ptr<GridDensityProvider> ArbitraryGridDensityProviderFactory::newGridDensityProvider(OccluderSource& source, const real proscenium[4])
{
return auto_ptr<GridDensityProvider>(new ArbitraryGridDensityProvider(source, proscenium, numCells));
}
auto_ptr<GridDensityProvider> ArbitraryGridDensityProviderFactory::newGridDensityProvider(OccluderSource& source, const BBox<Vec3r>& bbox, const GridHelpers::Transform& transform)
{
return auto_ptr<GridDensityProvider>(new ArbitraryGridDensityProvider(source, bbox, transform, numCells));
}
auto_ptr<GridDensityProvider> ArbitraryGridDensityProviderFactory::newGridDensityProvider(OccluderSource& source)
{
return auto_ptr<GridDensityProvider>(new ArbitraryGridDensityProvider(source, numCells));
}
|
