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-rw-r--r--libs/assimp/code/AssetLib/Terragen/TerragenLoader.cpp249
-rw-r--r--libs/assimp/code/AssetLib/Terragen/TerragenLoader.h100
2 files changed, 349 insertions, 0 deletions
diff --git a/libs/assimp/code/AssetLib/Terragen/TerragenLoader.cpp b/libs/assimp/code/AssetLib/Terragen/TerragenLoader.cpp
new file mode 100644
index 0000000..c9c91db
--- /dev/null
+++ b/libs/assimp/code/AssetLib/Terragen/TerragenLoader.cpp
@@ -0,0 +1,249 @@
+/*
+---------------------------------------------------------------------------
+Open Asset Import Library (assimp)
+---------------------------------------------------------------------------
+
+Copyright (c) 2006-2022, 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 */
+
+#ifndef ASSIMP_BUILD_NO_TERRAGEN_IMPORTER
+
+#include "TerragenLoader.h"
+#include <assimp/StreamReader.h>
+#include <assimp/importerdesc.h>
+#include <assimp/scene.h>
+#include <assimp/DefaultLogger.hpp>
+#include <assimp/IOSystem.hpp>
+#include <assimp/Importer.hpp>
+
+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() :
+ configComputeUVs(false) {
+ // empty
+}
+
+// ------------------------------------------------------------------------------------------------
+// Destructor, private as well
+TerragenImporter::~TerragenImporter() {
+ // empty
+}
+
+// ------------------------------------------------------------------------------------------------
+// Returns whether the class can handle the format of the given file.
+bool TerragenImporter::CanRead(const std::string &pFile, IOSystem *pIOHandler, bool /*checkSig*/) const {
+ static const char *tokens[] = { "terragen" };
+ return SearchFileHeaderForToken(pIOHandler, pFile, tokens, AI_COUNT_OF(tokens));
+}
+
+// ------------------------------------------------------------------------------------------------
+// Build a string of all file extensions supported
+const aiImporterDesc *TerragenImporter::GetInfo() const {
+ return &desc;
+}
+
+// ------------------------------------------------------------------------------------------------
+// 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 == nullptr)
+ throw DeadlyImportError("Failed to open TERRAGEN TERRAIN file ", pFile, ".");
+
+ // Construct a stream reader to read all data in the correct endianness
+ 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;
+
+ 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)) {
+ reader.GetF4();
+ }
+ // mapping mode
+ else if (!::strncmp(head, AI_TERR_CHUNK_CRVM, 4)) {
+ mode = reader.GetI1();
+ if (0 != mode)
+ ASSIMP_LOG_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];
+
+ aiVector3D *uv(nullptr);
+ float step_y(0.0f), step_x(0.0f);
+ 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;
+ 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);
+
+ // 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;
+ 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 = reader.GetCurrentPos();
+ if (dtt & 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
diff --git a/libs/assimp/code/AssetLib/Terragen/TerragenLoader.h b/libs/assimp/code/AssetLib/Terragen/TerragenLoader.h
new file mode 100644
index 0000000..cb9ff91
--- /dev/null
+++ b/libs/assimp/code/AssetLib/Terragen/TerragenLoader.h
@@ -0,0 +1,100 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2022, 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 TerragenLoader.h
+ * @brief Declaration of the .ter importer class.
+ */
+#pragma once
+#ifndef INCLUDED_AI_TERRAGEN_TERRAIN_LOADER_H
+#define INCLUDED_AI_TERRAGEN_TERRAIN_LOADER_H
+
+#include <assimp/BaseImporter.h>
+
+namespace Assimp {
+
+// Magic strings
+#define AI_TERR_BASE_STRING "TERRAGEN"
+#define AI_TERR_TERRAIN_STRING "TERRAIN "
+#define AI_TERR_EOF_STRING "EOF "
+
+// Chunka
+#define AI_TERR_CHUNK_XPTS "XPTS"
+#define AI_TERR_CHUNK_YPTS "YPTS"
+#define AI_TERR_CHUNK_SIZE "SIZE"
+#define AI_TERR_CHUNK_SCAL "SCAL"
+#define AI_TERR_CHUNK_CRAD "CRAD"
+#define AI_TERR_CHUNK_CRVM "CRVM"
+#define AI_TERR_CHUNK_ALTW "ALTW"
+
+// ---------------------------------------------------------------------------
+/** @brief Importer class to load Terragen (0.9) terrain files.
+ *
+ * The loader is basing on the information found here:
+ * http://www.planetside.co.uk/terragen/dev/tgterrain.html#chunks
+*/
+class TerragenImporter : public BaseImporter {
+public:
+ TerragenImporter();
+ ~TerragenImporter() override;
+
+ // -------------------------------------------------------------------
+ bool CanRead(const std::string &pFile, IOSystem *pIOHandler,
+ bool checkSig) const override;
+
+protected:
+ // -------------------------------------------------------------------
+ const aiImporterDesc *GetInfo() const override;
+
+ // -------------------------------------------------------------------
+ void InternReadFile(const std::string &pFile, aiScene *pScene,
+ IOSystem *pIOHandler) override;
+
+ // -------------------------------------------------------------------
+ void SetupProperties(const Importer *pImp) override;
+
+private:
+ bool configComputeUVs;
+
+}; //! class TerragenImporter
+
+} // end of namespace Assimp
+
+#endif // AI_AC3DIMPORTER_H_INC
generated by cgit v1.2.1 (git 2.18.0) at 2024-12-24 03:04:02 +0000