1 /*
2 -----------------------------------------------------------------------------
3 This source file is part of OGRE
4 (Object-oriented Graphics Rendering Engine)
5 For the latest info, see http://www.ogre3d.org
6 
7 Copyright (c) 2000-2013 Torus Knot Software Ltd
8 Permission is hereby granted, free of charge, to any person obtaining a copy
9 of this software and associated documentation files (the "Software"), to deal
10 in the Software without restriction, including without limitation the rights
11 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
12 copies of the Software, and to permit persons to whom the Software is
13 furnished to do so, subject to the following conditions:
14 
15 The above copyright notice and this permission notice shall be included in
16 all copies or substantial portions of the Software.
17 
18 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
21 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
22 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
23 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
24 THE SOFTWARE.
25 -----------------------------------------------------------------------------
26 */
27 #include "OgreVolumeHalfFloatGridSource.h"
28 #include "OgreRoot.h"
29 #include "OgreDeflate.h"
30 #include "OgreStreamSerialiser.h"
31 #include "OgreBitwise.h"
32 #include "OgreMemoryAllocatorConfig.h"
33 #include "OgreLogManager.h"
34 #include "OgreTimer.h"
35 
36 namespace Ogre {
37 namespace Volume {
38 
getVolumeGridValue(size_t x,size_t y,size_t z) const39     float HalfFloatGridSource::getVolumeGridValue(size_t x, size_t y, size_t z) const
40     {
41         x = x >= mWidth ? mWidth - 1 : x;
42         y = y >= mHeight ? mHeight - 1 : y;
43         z = z >= mDepth ? mDepth - 1 : z;
44         return Bitwise::halfToFloat(mData[(mDepth - z - 1) * mDepthTimesHeight + x * mHeight + y]);
45     }
46 
47     //-----------------------------------------------------------------------
48 
setVolumeGridValue(int x,int y,int z,float value)49     void HalfFloatGridSource::setVolumeGridValue(int x, int y, int z, float value)
50     {
51 
52         // Clamp if wanted.
53         if (mMaxClampedAbsoluteDensity != (Real)0.0 && Math::Abs(value) > mMaxClampedAbsoluteDensity)
54         {
55             value = mMaxClampedAbsoluteDensity;
56         }
57 
58         mData[(mDepth - z - 1) * mDepthTimesHeight + x * mHeight + y] = Bitwise::floatToHalf(value);
59     }
60 
61     //-----------------------------------------------------------------------
62 
HalfFloatGridSource(const String & serializedVolumeFile,const bool trilinearValue,const bool trilinearGradient,const bool sobelGradient)63     HalfFloatGridSource::HalfFloatGridSource(const String &serializedVolumeFile, const bool trilinearValue, const bool trilinearGradient, const bool sobelGradient) :
64         GridSource(trilinearValue, trilinearGradient, sobelGradient)
65     {
66 
67         Timer t;
68         DataStreamPtr streamRead = Root::getSingleton().openFileStream(serializedVolumeFile);
69 #if OGRE_NO_ZIP_ARCHIVE == 0
70         DataStreamPtr uncompressStream(OGRE_NEW DeflateStream(serializedVolumeFile, streamRead));
71         StreamSerialiser ser(uncompressStream);
72 #else
73         StreamSerialiser ser(streamRead);
74 #endif
75         if (!ser.readChunkBegin(VOLUME_CHUNK_ID, VOLUME_CHUNK_VERSION))
76         {
77             OGRE_EXCEPT(Exception::ERR_INVALID_STATE,
78                 "Invalid volume file given!",
79                 __FUNCTION__);
80         }
81 
82         // Read header
83         Vector3 readFrom, readTo;
84         ser.read(&readFrom);
85         ser.read(&readTo);
86         float voxelWidth;
87         ser.read<float>(&voxelWidth);
88         size_t width, height, depth;
89         ser.read<size_t>(&width);
90         ser.read<size_t>(&height);
91         ser.read<size_t>(&depth);
92         mWidth = static_cast<int>(width);
93         mHeight = static_cast<int>(height);
94         mDepth = static_cast<int>(depth);
95         mDepthTimesHeight = static_cast<int>(mDepth * mHeight);
96 
97         Vector3 worldDimension = readTo - readFrom;
98         mPosXScale = (Real)1.0 / (Real)worldDimension.x * (Real)mWidth;
99         mPosYScale = (Real)1.0 / (Real)worldDimension.y * (Real)mHeight;
100         mPosZScale = (Real)1.0 / (Real)worldDimension.z * (Real)mDepth;
101 
102         mVolumeSpaceToWorldSpaceFactor = (Real)worldDimension.x * (Real)mWidth;
103         mMaxClampedAbsoluteDensity = 0;
104 
105         // Read data
106         size_t elementCount = mWidth * mHeight * mDepth;
107         mData = OGRE_ALLOC_T(uint16, elementCount, MEMCATEGORY_GENERAL);
108         ser.read(mData, elementCount);
109 
110         ser.readChunkEnd(VOLUME_CHUNK_ID);
111 
112         LogManager::getSingleton().stream() << "Processed serialization in " << t.getMilliseconds() << "ms.";
113     }
114 
115     //-----------------------------------------------------------------------
116 
setMaxClampedAbsoluteDensity(Real maxClampedAbsoluteDensity)117     void HalfFloatGridSource::setMaxClampedAbsoluteDensity(Real maxClampedAbsoluteDensity)
118     {
119         mMaxClampedAbsoluteDensity = maxClampedAbsoluteDensity;
120     }
121 
122     //-----------------------------------------------------------------------
123 
124 
getMaxClampedAbsoluteDensity(void) const125     Real HalfFloatGridSource::getMaxClampedAbsoluteDensity(void) const
126     {
127         return mMaxClampedAbsoluteDensity;
128     }
129 
130     //-----------------------------------------------------------------------
131 
~HalfFloatGridSource(void)132     HalfFloatGridSource::~HalfFloatGridSource(void)
133     {
134         OGRE_FREE(mData, MEMCATEGORY_GENERAL);
135     }
136 }
137 }