add assimp submodule

1 files changed, 214 insertions, 0 deletions

diff --git a/src/mesh/assimp-master/code/AssetLib/Blender/BlenderTessellator.h b/src/mesh/assimp-master/code/AssetLib/Blender/BlenderTessellator.h
new file mode 100644
index 0000000..0d0ba32
--- /dev/null
+++ b/src/mesh/assimp-master/code/AssetLib/Blender/BlenderTessellator.h
@@ -0,0 +1,214 @@
+/*
+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  BlenderTessellator.h
+ *  @brief A simple tessellation wrapper
+ */
+#ifndef INCLUDED_AI_BLEND_TESSELLATOR_H
+#define INCLUDED_AI_BLEND_TESSELLATOR_H
+
+// Use these to toggle between GLU Tessellate or poly2tri
+// Note (acg) keep GLU Tessellate disabled by default - if it is turned on,
+// assimp needs to be linked against GLU, which is currently not yet
+// made configurable in CMake and potentially not wanted by most users
+// as it requires a Gl environment.
+#ifndef ASSIMP_BLEND_WITH_GLU_TESSELLATE
+#   define ASSIMP_BLEND_WITH_GLU_TESSELLATE 0
+#endif
+
+#ifndef ASSIMP_BLEND_WITH_POLY_2_TRI
+#   define ASSIMP_BLEND_WITH_POLY_2_TRI 1
+#endif
+
+#include <assimp/LogAux.h>
+
+#if ASSIMP_BLEND_WITH_GLU_TESSELLATE
+
+#if defined( WIN32 ) || defined( _WIN32 ) || defined( _MSC_VER )
+#include <windows.h>
+#endif
+#include <GL/glu.h>
+
+namespace Assimp
+{
+    class BlenderBMeshConverter;
+
+    // TinyFormatter.h
+    namespace Formatter
+    {
+        template < typename T,typename TR, typename A > class basic_formatter;
+        typedef class basic_formatter< char, std::char_traits< char >, std::allocator< char > > format;
+    }
+
+    // BlenderScene.h
+    namespace Blender
+    {
+        struct MLoop;
+        struct MVert;
+
+        struct VertexGL
+        {
+            GLdouble X;
+            GLdouble Y;
+            GLdouble Z;
+            int index;
+            int magic;
+
+            VertexGL( GLdouble X, GLdouble Y, GLdouble Z, int index, int magic ): X( X ), Y( Y ), Z( Z ), index( index ), magic( magic ) { }
+        };
+
+        struct DrawCallGL
+        {
+            GLenum drawMode;
+            int baseVertex;
+            int vertexCount;
+
+            DrawCallGL( GLenum drawMode, int baseVertex ): drawMode( drawMode ), baseVertex( baseVertex ), vertexCount( 0 ) { }
+        };
+
+        struct TessDataGL
+        {
+            std::vector< DrawCallGL > drawCalls;
+            std::vector< VertexGL > vertices;
+        };
+    }
+
+    class BlenderTessellatorGL: public LogFunctions< BlenderTessellatorGL >
+    {
+    public:
+        BlenderTessellatorGL( BlenderBMeshConverter& converter );
+        ~BlenderTessellatorGL( );
+
+        void Tessellate( const Blender::MLoop* polyLoop, int vertexCount, const std::vector< Blender::MVert >& vertices );
+
+    private:
+        void AssertVertexCount( int vertexCount );
+        void GenerateLoopVerts( std::vector< Blender::VertexGL >& polyLoopGL, const Blender::MLoop* polyLoop, int vertexCount, const std::vector< Blender::MVert >& vertices );
+        void Tesssellate( std::vector< Blender::VertexGL >& polyLoopGL, Blender::TessDataGL& tessData );
+        void TriangulateDrawCalls( const Blender::TessDataGL& tessData );
+        void MakeFacesFromTris( const Blender::VertexGL* vertices, int vertexCount );
+        void MakeFacesFromTriStrip( const Blender::VertexGL* vertices, int vertexCount );
+        void MakeFacesFromTriFan( const Blender::VertexGL* vertices, int vertexCount );
+
+        static void TessellateBegin( GLenum drawModeGL, void* userData );
+        static void TessellateEnd( void* userData );
+        static void TessellateVertex( const void* vtxData, void* userData );
+        static void TessellateCombine( const GLdouble intersection[ 3 ], const GLdouble* [ 4 ], const GLfloat [ 4 ], GLdouble** out, void* userData );
+        static void TessellateEdgeFlag( GLboolean edgeFlag, void* userData );
+        static void TessellateError( GLenum errorCode, void* userData );
+
+        BlenderBMeshConverter* converter;
+    };
+} // end of namespace Assimp
+
+#endif // ASSIMP_BLEND_WITH_GLU_TESSELLATE
+
+#if ASSIMP_BLEND_WITH_POLY_2_TRI
+
+#ifdef ASSIMP_USE_HUNTER
+#  include <poly2tri/poly2tri.h>
+#else
+#  include "../contrib/poly2tri/poly2tri/poly2tri.h"
+#endif
+
+namespace Assimp
+{
+    class BlenderBMeshConverter;
+
+    // TinyFormatter.h
+    namespace Formatter
+    {
+        template < typename T,typename TR, typename A > class basic_formatter;
+        typedef class basic_formatter< char, std::char_traits< char >, std::allocator< char > > format;
+    }
+
+    // BlenderScene.h
+    namespace Blender
+    {
+        struct MLoop;
+        struct MVert;
+
+        struct PointP2T
+        {
+            aiVector3D point3D;
+            p2t::Point point2D;
+            int magic;
+            int index;
+        };
+
+        struct PlaneP2T
+        {
+            aiVector3D centre;
+            aiVector3D normal;
+        };
+    }
+
+    class BlenderTessellatorP2T: public LogFunctions< BlenderTessellatorP2T >
+    {
+    public:
+        BlenderTessellatorP2T( BlenderBMeshConverter& converter );
+        ~BlenderTessellatorP2T( );
+
+        void Tessellate( const Blender::MLoop* polyLoop, int vertexCount, const std::vector< Blender::MVert >& vertices );
+
+    private:
+        void AssertVertexCount( int vertexCount );
+        void Copy3DVertices( const Blender::MLoop* polyLoop, int vertexCount, const std::vector< Blender::MVert >& vertices, std::vector< Blender::PointP2T >& targetVertices ) const;
+        aiMatrix4x4 GeneratePointTransformMatrix( const Blender::PlaneP2T& plane ) const;
+        void TransformAndFlattenVectices( const aiMatrix4x4& transform, std::vector< Blender::PointP2T >& vertices ) const;
+        void ReferencePoints( std::vector< Blender::PointP2T >& points, std::vector< p2t::Point* >& pointRefs ) const;
+        inline Blender::PointP2T& GetActualPointStructure( p2t::Point& point ) const;
+        void MakeFacesFromTriangles( std::vector< p2t::Triangle* >& triangles ) const;
+
+        // Adapted from: http://missingbytes.blogspot.co.uk/2012/06/fitting-plane-to-point-cloud.html
+        float FindLargestMatrixElem( const aiMatrix3x3& mtx ) const;
+        aiMatrix3x3 ScaleMatrix( const aiMatrix3x3& mtx, float scale ) const;
+        aiVector3D GetEigenVectorFromLargestEigenValue( const aiMatrix3x3& mtx ) const;
+        Blender::PlaneP2T FindLLSQPlane( const std::vector< Blender::PointP2T >& points ) const;
+
+        BlenderBMeshConverter* converter;
+    };
+} // end of namespace Assimp
+
+#endif // ASSIMP_BLEND_WITH_POLY_2_TRI
+
+#endif // INCLUDED_AI_BLEND_TESSELLATOR_H