add vcglib

vcglib/apps/sample/trimesh_texture/CMakeLists.txt

@@ -0,0 +1,31 @@
+cmake_minimum_required(VERSION 3.13)
+project(trimesh_texture)
+
+find_package(
+	Qt5
+	COMPONENTS OpenGL Svg)
+
+if (TARGET Qt5::OpenGL AND TARGET Qt5::Svg)
+
+	if (VCG_HEADER_ONLY)
+		set(SOURCES
+			trimesh_texture.cpp
+			${VCG_INCLUDE_DIRS}/wrap/ply/plylib.cpp
+			${VCG_INCLUDE_DIRS}/wrap/qt/Outline2ToQImage.cpp
+			${VCG_INCLUDE_DIRS}/wrap/qt/outline2_rasterizer.cpp)
+	endif()
+
+	add_executable(trimesh_texture
+		${SOURCES})
+
+	target_link_libraries(
+		trimesh_texture
+		PUBLIC
+			vcglib
+			Qt5::OpenGL
+			Qt5::Svg
+		)
+else()
+	message(
+		STATUS "VCG examples - Skipping trimesh_texture example")
+endif()

vcglib/apps/sample/trimesh_texture/trimesh_texture.cpp

@@ -0,0 +1,136 @@
+/****************************************************************************
+* VCGLib                                                            o o     *
+* Visual and Computer Graphics Library                            o     o   *
+*                                                                _   O  _   *
+* Copyright(C) 2004-2016                                           \/)\/    *
+* Visual Computing Lab                                            /\/|      *
+* ISTI - Italian National Research Council                           |      *
+*                                                                    \      *
+* All rights reserved.                                                      *
+*                                                                           *
+* 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 (http://www.gnu.org/licenses/gpl.txt)          *
+* for more details.                                                         *
+*                                                                           *
+****************************************************************************/
+#include<vcg/complex/complex.h>
+
+// input output
+#include <wrap/io_trimesh/import_ply.h>
+#include <wrap/io_trimesh/export_ply.h>
+
+#include<vcg/complex/algorithms/outline_support.h>
+
+#include <vcg/space/outline2_packer.h>
+#include <wrap/qt/outline2_rasterizer.h>
+
+#include <vcg/space/rasterized_outline2_packer.h>
+#include <wrap/qt/Outline2ToQImage.h>
+/*! \file trimesh_texture.cpp
+\ingroup code_sample
+
+\brief a small example about packing texture regions
+
+It takes a sample mesh as input, computes the connected
+components of its parametrization and pack them again using two different strategies
+*/
+
+using namespace vcg;
+
+class MyEdge;
+class MyFace;
+class MyVertex;
+struct MyUsedTypes : public UsedTypes<	Use<MyVertex>::AsVertexType, Use<MyFace>::AsFaceType>{};
+
+class MyVertex  : public Vertex< MyUsedTypes, vertex::Coord3f, vertex::BitFlags  >{};
+class MyFace    : public Face  < MyUsedTypes, face::VertexRef, face::FFAdj, face::WedgeTexCoord2f, face::Mark, face::BitFlags > {};
+class MyMesh : public tri::TriMesh< std::vector<MyVertex>, std::vector<MyFace > >{};
+
+
+int main(int ,char ** )
+{
+  MyMesh m,tm;
+  tri::io::ImporterPLY<MyMesh>::Open(m,"../../meshes/bunny10k_textured.ply");
+
+  // 1) Build a mesh with tex coords as coords. 
+  
+  for( auto &&f : m.face)
+  {
+   tri::Allocator<MyMesh>::AddFace(tm,
+                                   Point3f(f.WT(0).U(),f.WT(0).V(),0),
+                                   Point3f(f.WT(1).U(),f.WT(1).V(),0),
+                                   Point3f(f.WT(2).U(),f.WT(2).V(),0));
+  }
+  
+  // 2) compute connected components (e.g. texture regions in an atlas)
+  tri::Clean<MyMesh>::RemoveDuplicateVertex(tm);
+  tri::UpdateTopology<MyMesh>::FaceFace(tm);
+  std::vector<std::pair<int,MyMesh::FacePointer> > fpVec;
+  tri::Clean<MyMesh>::ConnectedComponents(tm,fpVec);
+  printf("Mesh has %lu texture components\n",fpVec.size());
+  tri::io::ExporterPLY<MyMesh>::Save(tm,"out.ply");
+  std::vector< std::vector<Point2f> > outline2Vec;
+  
+  // build the 2D outlines of each regions
+  for(size_t i=0; i<fpVec.size();++i)
+  {
+    tri::UpdateSelection<MyMesh>::FaceClear(tm);
+    fpVec[i].second->SetS();
+    tri::UpdateSelection<MyMesh>::FaceConnectedFF(tm);
+    tri::UpdateSelection<MyMesh>::VertexClear(tm);
+    tri::UpdateSelection<MyMesh>::VertexFromFaceLoose(tm);
+
+    MyMesh comp;
+    tri::Append<MyMesh,MyMesh>::Mesh(comp, tm, true);
+
+    std::vector< std::vector<Point3f> > outline3Vec;
+    tri::OutlineUtil<float>::ConvertMeshBoundaryToOutline3Vec(comp, outline3Vec);
+    std::vector< std::vector<Point2f> > compOutline2Vec;
+    tri::OutlineUtil<float>::ConvertOutline3VecToOutline2Vec(outline3Vec,compOutline2Vec);
+    int largestInd=tri::OutlineUtil<float>::LargestOutline2(compOutline2Vec);
+    if(tri::OutlineUtil<float>::Outline2Area(compOutline2Vec[largestInd])<0)
+      tri::OutlineUtil<float>::ReverseOutline2(compOutline2Vec[largestInd]);
+
+    outline2Vec.push_back(compOutline2Vec[largestInd]);
+  }
+
+  printf("Mesh has %lu texture components\n",outline2Vec.size());
+
+  Outline2Dumper::Param pp;
+  Similarity2f sim;
+  sim.sca=1024.0f;
+  std::vector<Similarity2f> trVec(outline2Vec.size(),sim);
+  printf("Mesh has %lu texture components\n",outline2Vec.size());
+  
+  // Dump the original parametrization as a png
+  Outline2Dumper::dumpOutline2VecPNG("PrePack.png",outline2Vec,trVec,pp);
+
+  // Pack using Axis Aligned Rect
+  const Point2i containerSize(1024,1024);
+  Point2f finalSize(1024,1024);
+  PolyPacker<float>::PackAsAxisAlignedRect(outline2Vec,containerSize,trVec,finalSize);
+
+  Outline2Dumper::dumpOutline2VecPNG("PostPack.png",outline2Vec,trVec,pp);
+
+   // Pack using Oriented Rect
+  RasterizedOutline2Packer<float, QtOutline2Rasterizer>::Parameters packingParam;
+  packingParam.costFunction  = RasterizedOutline2Packer<float, QtOutline2Rasterizer>::Parameters::LowestHorizon;
+  packingParam.doubleHorizon = true;
+  packingParam.innerHorizon = true;
+  packingParam.permutations = false;
+  packingParam.rotationNum = 16; //number of rasterizations in 90°
+  packingParam.gutterWidth = 2;
+
+  RasterizedOutline2Packer<float, QtOutline2Rasterizer>::Pack(outline2Vec,containerSize,trVec,packingParam);
+  Outline2Dumper::dumpOutline2VecPNG("PostPackRR.png",outline2Vec,trVec,pp);
+
+  return 0;
+}
+

vcglib/apps/sample/trimesh_texture/trimesh_texture.pro

@@ -0,0 +1,7 @@
+include(../common.pri)
+QT += opengl svg
+TARGET = trimesh_texture
+SOURCES += trimesh_texture.cpp  \
+../../../../vcglib/wrap/qt/Outline2ToQImage.cpp \
+../../../../vcglib/wrap/qt/outline2_rasterizer.cpp \
+../../../wrap/ply/plylib.cpp