assimp/code/TerragenLoader.cpp

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/*
---------------------------------------------------------------------------
Open Asset Import Library (assimp)
---------------------------------------------------------------------------
Copyright (c) 2006-2012, assimp team
All rights reserved.
Redistribution and use of this software 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 assimp team, nor the names of its
contributors may be used to endorse or promote products
derived from this software without specific prior
written permission of the assimp team.
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.
---------------------------------------------------------------------------
*/
/** @file Implementation of the Terragen importer class */
#include "AssimpPCH.h"
#ifndef ASSIMP_BUILD_NO_TERRAGEN_IMPORTER
#include "TerragenLoader.h"
using namespace Assimp;
static const aiImporterDesc desc = {
"Terragen Heightmap Importer",
"",
"",
"http://www.planetside.co.uk/",
aiImporterFlags_SupportBinaryFlavour,
0,
0,
0,
0,
"ter"
};
// ------------------------------------------------------------------------------------------------
// Constructor to be privately used by Importer
TerragenImporter::TerragenImporter()
General - Added format auto-detection to most loaders - Simplified BaseImporter::CanRead() with some utility methods - improved fast_atof -> no overruns anymore. Fuck you, irrlicht. - added assimp_cmd tool to allow command line model processing. Mainly adebugging tool for internal purposes, but others might find it useful, too. - vc8/vc9: revision number is now written to DLL version header - mkutil: some batch scripts to simplify tagging & building of release versions - some API cleanup - fixing some doxygen markup (+now explicit use of @file <filename>) - Icon for assimp_view and assimp_cmd 3DS - Normal vectors are not anymore inverted in some cases - Improved pivot handling - Improved handling of x-flipped meshes Collada - fixed a minor bug (visual_scene element) LWS - WIP implementation. No animations yet, some bugs and crashes. - Animation system remains disabled, WIP code - many test files for LWS, but most of them test the anim support, which is, read above, currently disabled. STL - fixing a log warning which appears for every model - added binary&ascii test spider, exported from truespace MD3 - Cleaning up output tags for automatically joined player models. IRR - Fixing coordinate system issues. - Instance handling improved. - Some of the reported crashes not yet fixed. PretransformVertices - Numerous performance improvements. - Added config option to preserve the hierarchy during the step. RemoveRedundantMaterials - Added config option to specify a list of materials which are kept in every case. UNREAL - Added support for the old unreal data format (*.a,*.d,*.uc) - tested only with exports from Milkshape - more Unreal stuff to come soon git-svn-id: https://assimp.svn.sourceforge.net/svnroot/assimp/trunk@356 67173fc5-114c-0410-ac8e-9d2fd5bffc1f
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: configComputeUVs (false)
{}
// ------------------------------------------------------------------------------------------------
// Destructor, private as well
TerragenImporter::~TerragenImporter()
{}
// ------------------------------------------------------------------------------------------------
// Returns whether the class can handle the format of the given file.
General - Added format auto-detection to most loaders - Simplified BaseImporter::CanRead() with some utility methods - improved fast_atof -> no overruns anymore. Fuck you, irrlicht. - added assimp_cmd tool to allow command line model processing. Mainly adebugging tool for internal purposes, but others might find it useful, too. - vc8/vc9: revision number is now written to DLL version header - mkutil: some batch scripts to simplify tagging & building of release versions - some API cleanup - fixing some doxygen markup (+now explicit use of @file <filename>) - Icon for assimp_view and assimp_cmd 3DS - Normal vectors are not anymore inverted in some cases - Improved pivot handling - Improved handling of x-flipped meshes Collada - fixed a minor bug (visual_scene element) LWS - WIP implementation. No animations yet, some bugs and crashes. - Animation system remains disabled, WIP code - many test files for LWS, but most of them test the anim support, which is, read above, currently disabled. STL - fixing a log warning which appears for every model - added binary&ascii test spider, exported from truespace MD3 - Cleaning up output tags for automatically joined player models. IRR - Fixing coordinate system issues. - Instance handling improved. - Some of the reported crashes not yet fixed. PretransformVertices - Numerous performance improvements. - Added config option to preserve the hierarchy during the step. RemoveRedundantMaterials - Added config option to specify a list of materials which are kept in every case. UNREAL - Added support for the old unreal data format (*.a,*.d,*.uc) - tested only with exports from Milkshape - more Unreal stuff to come soon git-svn-id: https://assimp.svn.sourceforge.net/svnroot/assimp/trunk@356 67173fc5-114c-0410-ac8e-9d2fd5bffc1f
2009-03-05 22:32:13 +00:00
bool TerragenImporter::CanRead( const std::string& pFile, IOSystem* pIOHandler, bool checkSig) const
{
General - Added format auto-detection to most loaders - Simplified BaseImporter::CanRead() with some utility methods - improved fast_atof -> no overruns anymore. Fuck you, irrlicht. - added assimp_cmd tool to allow command line model processing. Mainly adebugging tool for internal purposes, but others might find it useful, too. - vc8/vc9: revision number is now written to DLL version header - mkutil: some batch scripts to simplify tagging & building of release versions - some API cleanup - fixing some doxygen markup (+now explicit use of @file <filename>) - Icon for assimp_view and assimp_cmd 3DS - Normal vectors are not anymore inverted in some cases - Improved pivot handling - Improved handling of x-flipped meshes Collada - fixed a minor bug (visual_scene element) LWS - WIP implementation. No animations yet, some bugs and crashes. - Animation system remains disabled, WIP code - many test files for LWS, but most of them test the anim support, which is, read above, currently disabled. STL - fixing a log warning which appears for every model - added binary&ascii test spider, exported from truespace MD3 - Cleaning up output tags for automatically joined player models. IRR - Fixing coordinate system issues. - Instance handling improved. - Some of the reported crashes not yet fixed. PretransformVertices - Numerous performance improvements. - Added config option to preserve the hierarchy during the step. RemoveRedundantMaterials - Added config option to specify a list of materials which are kept in every case. UNREAL - Added support for the old unreal data format (*.a,*.d,*.uc) - tested only with exports from Milkshape - more Unreal stuff to come soon git-svn-id: https://assimp.svn.sourceforge.net/svnroot/assimp/trunk@356 67173fc5-114c-0410-ac8e-9d2fd5bffc1f
2009-03-05 22:32:13 +00:00
// check file extension
std::string extension = GetExtension(pFile);
if( extension == "ter")
return true;
if( !extension.length() || checkSig) {
/* If CanRead() is called in order to check whether we
* support a specific file extension in general pIOHandler
* might be NULL and it's our duty to return true here.
*/
if (!pIOHandler)return true;
const char* tokens[] = {"terragen"};
return SearchFileHeaderForToken(pIOHandler,pFile,tokens,1);
}
return false;
}
// ------------------------------------------------------------------------------------------------
// Build a string of all file extensions supported
const aiImporterDesc* TerragenImporter::GetInfo () const
{
return &desc;
}
General - Added format auto-detection to most loaders - Simplified BaseImporter::CanRead() with some utility methods - improved fast_atof -> no overruns anymore. Fuck you, irrlicht. - added assimp_cmd tool to allow command line model processing. Mainly adebugging tool for internal purposes, but others might find it useful, too. - vc8/vc9: revision number is now written to DLL version header - mkutil: some batch scripts to simplify tagging & building of release versions - some API cleanup - fixing some doxygen markup (+now explicit use of @file <filename>) - Icon for assimp_view and assimp_cmd 3DS - Normal vectors are not anymore inverted in some cases - Improved pivot handling - Improved handling of x-flipped meshes Collada - fixed a minor bug (visual_scene element) LWS - WIP implementation. No animations yet, some bugs and crashes. - Animation system remains disabled, WIP code - many test files for LWS, but most of them test the anim support, which is, read above, currently disabled. STL - fixing a log warning which appears for every model - added binary&ascii test spider, exported from truespace MD3 - Cleaning up output tags for automatically joined player models. IRR - Fixing coordinate system issues. - Instance handling improved. - Some of the reported crashes not yet fixed. PretransformVertices - Numerous performance improvements. - Added config option to preserve the hierarchy during the step. RemoveRedundantMaterials - Added config option to specify a list of materials which are kept in every case. UNREAL - Added support for the old unreal data format (*.a,*.d,*.uc) - tested only with exports from Milkshape - more Unreal stuff to come soon git-svn-id: https://assimp.svn.sourceforge.net/svnroot/assimp/trunk@356 67173fc5-114c-0410-ac8e-9d2fd5bffc1f
2009-03-05 22:32:13 +00:00
// ------------------------------------------------------------------------------------------------
// Setup import properties
void TerragenImporter::SetupProperties(const Importer* pImp)
{
// AI_CONFIG_IMPORT_TER_MAKE_UVS
configComputeUVs = ( 0 != pImp->GetPropertyInteger(AI_CONFIG_IMPORT_TER_MAKE_UVS,0) );
}
// ------------------------------------------------------------------------------------------------
// Imports the given file into the given scene structure.
void TerragenImporter::InternReadFile( const std::string& pFile,
aiScene* pScene, IOSystem* pIOHandler)
{
IOStream* file = pIOHandler->Open( pFile, "rb");
// Check whether we can read from the file
if( file == NULL)
throw DeadlyImportError( "Failed to open TERRAGEN TERRAIN file " + pFile + ".");
// Construct a stream reader to read all data in the correct endianess
StreamReaderLE reader(file);
if(reader.GetRemainingSize() < 16)
throw DeadlyImportError( "TER: file is too small" );
// Check for the existence of the two magic strings 'TERRAGEN' and 'TERRAIN '
if (::strncmp((const char*)reader.GetPtr(),AI_TERR_BASE_STRING,8))
throw DeadlyImportError( "TER: Magic string \'TERRAGEN\' not found" );
if (::strncmp((const char*)reader.GetPtr()+8,AI_TERR_TERRAIN_STRING,8))
throw DeadlyImportError( "TER: Magic string \'TERRAIN\' not found" );
unsigned int x = 0,y = 0,mode = 0;
float rad = 6370.f;
(void)rad;
aiNode* root = pScene->mRootNode = new aiNode();
root->mName.Set("<TERRAGEN.TERRAIN>");
// Default scaling is 30
root->mTransformation.a1 = root->mTransformation.b2 = root->mTransformation.c3 = 30.f;
// Now read all chunks until we're finished or an EOF marker is encountered
reader.IncPtr(16);
while (reader.GetRemainingSize() >= 4)
{
const char* head = (const char*)reader.GetPtr();
reader.IncPtr(4);
// EOF, break in every case
if (!::strncmp(head,AI_TERR_EOF_STRING,4))
break;
// Number of x-data points
if (!::strncmp(head,AI_TERR_CHUNK_XPTS,4))
{
x = (uint16_t)reader.GetI2();
}
// Number of y-data points
else if (!::strncmp(head,AI_TERR_CHUNK_YPTS,4))
{
y = (uint16_t)reader.GetI2();
}
// Squared terrains width-1.
else if (!::strncmp(head,AI_TERR_CHUNK_SIZE,4))
{
x = y = (uint16_t)reader.GetI2()+1;
}
// terrain scaling
else if (!::strncmp(head,AI_TERR_CHUNK_SCAL,4))
{
root->mTransformation.a1 = reader.GetF4();
root->mTransformation.b2 = reader.GetF4();
root->mTransformation.c3 = reader.GetF4();
}
// mapping == 1: earth radius
else if (!::strncmp(head,AI_TERR_CHUNK_CRAD,4))
{
rad = reader.GetF4();
}
// mapping mode
else if (!::strncmp(head,AI_TERR_CHUNK_CRVM,4))
{
mode = reader.GetI1();
if (0 != mode)
DefaultLogger::get()->error("TER: Unsupported mapping mode, a flat terrain is returned");
}
// actual terrain data
else if (!::strncmp(head,AI_TERR_CHUNK_ALTW,4))
{
float hscale = (float)reader.GetI2() / 65536;
float bheight = (float)reader.GetI2();
if (!hscale)hscale = 1;
// Ensure we have enough data
if (reader.GetRemainingSize() < x*y*2)
throw DeadlyImportError("TER: ALTW chunk is too small");
if (x <= 1 || y <= 1)
throw DeadlyImportError("TER: Invalid terrain size");
// Allocate the output mesh
pScene->mMeshes = new aiMesh*[pScene->mNumMeshes = 1];
aiMesh* m = pScene->mMeshes[0] = new aiMesh();
// We return quads
aiFace* f = m->mFaces = new aiFace[m->mNumFaces = (x-1)*(y-1)];
aiVector3D* pv = m->mVertices = new aiVector3D[m->mNumVertices = m->mNumFaces*4];
General - Added format auto-detection to most loaders - Simplified BaseImporter::CanRead() with some utility methods - improved fast_atof -> no overruns anymore. Fuck you, irrlicht. - added assimp_cmd tool to allow command line model processing. Mainly adebugging tool for internal purposes, but others might find it useful, too. - vc8/vc9: revision number is now written to DLL version header - mkutil: some batch scripts to simplify tagging & building of release versions - some API cleanup - fixing some doxygen markup (+now explicit use of @file <filename>) - Icon for assimp_view and assimp_cmd 3DS - Normal vectors are not anymore inverted in some cases - Improved pivot handling - Improved handling of x-flipped meshes Collada - fixed a minor bug (visual_scene element) LWS - WIP implementation. No animations yet, some bugs and crashes. - Animation system remains disabled, WIP code - many test files for LWS, but most of them test the anim support, which is, read above, currently disabled. STL - fixing a log warning which appears for every model - added binary&ascii test spider, exported from truespace MD3 - Cleaning up output tags for automatically joined player models. IRR - Fixing coordinate system issues. - Instance handling improved. - Some of the reported crashes not yet fixed. PretransformVertices - Numerous performance improvements. - Added config option to preserve the hierarchy during the step. RemoveRedundantMaterials - Added config option to specify a list of materials which are kept in every case. UNREAL - Added support for the old unreal data format (*.a,*.d,*.uc) - tested only with exports from Milkshape - more Unreal stuff to come soon git-svn-id: https://assimp.svn.sourceforge.net/svnroot/assimp/trunk@356 67173fc5-114c-0410-ac8e-9d2fd5bffc1f
2009-03-05 22:32:13 +00:00
aiVector3D *uv( NULL );
float step_y( 0.0f ), step_x( 0.0f );
General - Added format auto-detection to most loaders - Simplified BaseImporter::CanRead() with some utility methods - improved fast_atof -> no overruns anymore. Fuck you, irrlicht. - added assimp_cmd tool to allow command line model processing. Mainly adebugging tool for internal purposes, but others might find it useful, too. - vc8/vc9: revision number is now written to DLL version header - mkutil: some batch scripts to simplify tagging & building of release versions - some API cleanup - fixing some doxygen markup (+now explicit use of @file <filename>) - Icon for assimp_view and assimp_cmd 3DS - Normal vectors are not anymore inverted in some cases - Improved pivot handling - Improved handling of x-flipped meshes Collada - fixed a minor bug (visual_scene element) LWS - WIP implementation. No animations yet, some bugs and crashes. - Animation system remains disabled, WIP code - many test files for LWS, but most of them test the anim support, which is, read above, currently disabled. STL - fixing a log warning which appears for every model - added binary&ascii test spider, exported from truespace MD3 - Cleaning up output tags for automatically joined player models. IRR - Fixing coordinate system issues. - Instance handling improved. - Some of the reported crashes not yet fixed. PretransformVertices - Numerous performance improvements. - Added config option to preserve the hierarchy during the step. RemoveRedundantMaterials - Added config option to specify a list of materials which are kept in every case. UNREAL - Added support for the old unreal data format (*.a,*.d,*.uc) - tested only with exports from Milkshape - more Unreal stuff to come soon git-svn-id: https://assimp.svn.sourceforge.net/svnroot/assimp/trunk@356 67173fc5-114c-0410-ac8e-9d2fd5bffc1f
2009-03-05 22:32:13 +00:00
if (configComputeUVs) {
uv = m->mTextureCoords[0] = new aiVector3D[m->mNumVertices];
step_y = 1.f/y;
step_x = 1.f/x;
}
const int16_t* data = (const int16_t*)reader.GetPtr();
for (unsigned int yy = 0, t = 0; yy < y-1;++yy) {
for (unsigned int xx = 0; xx < x-1;++xx,++f) {
// make verts
const float fy = (float)yy, fx = (float)xx;
register unsigned tmp,tmp2;
*pv++ = aiVector3D(fx,fy, (float)data[(tmp2=x*yy) + xx] * hscale + bheight);
*pv++ = aiVector3D(fx,fy+1, (float)data[(tmp=x*(yy+1)) + xx] * hscale + bheight);
*pv++ = aiVector3D(fx+1,fy+1,(float)data[tmp + xx+1] * hscale + bheight);
*pv++ = aiVector3D(fx+1,fy, (float)data[tmp2 + xx+1] * hscale + bheight);
General - Added format auto-detection to most loaders - Simplified BaseImporter::CanRead() with some utility methods - improved fast_atof -> no overruns anymore. Fuck you, irrlicht. - added assimp_cmd tool to allow command line model processing. Mainly adebugging tool for internal purposes, but others might find it useful, too. - vc8/vc9: revision number is now written to DLL version header - mkutil: some batch scripts to simplify tagging & building of release versions - some API cleanup - fixing some doxygen markup (+now explicit use of @file <filename>) - Icon for assimp_view and assimp_cmd 3DS - Normal vectors are not anymore inverted in some cases - Improved pivot handling - Improved handling of x-flipped meshes Collada - fixed a minor bug (visual_scene element) LWS - WIP implementation. No animations yet, some bugs and crashes. - Animation system remains disabled, WIP code - many test files for LWS, but most of them test the anim support, which is, read above, currently disabled. STL - fixing a log warning which appears for every model - added binary&ascii test spider, exported from truespace MD3 - Cleaning up output tags for automatically joined player models. IRR - Fixing coordinate system issues. - Instance handling improved. - Some of the reported crashes not yet fixed. PretransformVertices - Numerous performance improvements. - Added config option to preserve the hierarchy during the step. RemoveRedundantMaterials - Added config option to specify a list of materials which are kept in every case. UNREAL - Added support for the old unreal data format (*.a,*.d,*.uc) - tested only with exports from Milkshape - more Unreal stuff to come soon git-svn-id: https://assimp.svn.sourceforge.net/svnroot/assimp/trunk@356 67173fc5-114c-0410-ac8e-9d2fd5bffc1f
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// also make texture coordinates, if necessary
if (configComputeUVs) {
*uv++ = aiVector3D( step_x*xx, step_y*yy, 0.f );
*uv++ = aiVector3D( step_x*xx, step_y*(yy+1), 0.f );
*uv++ = aiVector3D( step_x*(xx+1), step_y*(yy+1), 0.f );
*uv++ = aiVector3D( step_x*(xx+1), step_y*yy, 0.f );
}
// make indices
f->mIndices = new unsigned int[f->mNumIndices = 4];
for (unsigned int i = 0; i < 4;++i)
f->mIndices[i] = t++;
}
}
// Add the mesh to the root node
root->mMeshes = new unsigned int[root->mNumMeshes = 1];
root->mMeshes[0] = 0;
}
// Get to the next chunk (4 byte aligned)
unsigned dtt;
if ((dtt = reader.GetCurrentPos() & 0x3))
reader.IncPtr(4-dtt);
}
// Check whether we have a mesh now
if (pScene->mNumMeshes != 1)
throw DeadlyImportError("TER: Unable to load terrain");
// Set the AI_SCENE_FLAGS_TERRAIN bit
pScene->mFlags |= AI_SCENE_FLAGS_TERRAIN;
}
#endif // !! ASSIMP_BUILD_NO_TERRAGEN_IMPORTER