From d3243585c5e47f0bdb748f27964cf9f87cf26734 Mon Sep 17 00:00:00 2001
From: dibenedetto <marco.dibenedetto@isti.cnr.it>
Date: Fri, 23 Oct 2009 20:26:38 +0000
Subject: [PATCH] first commit.

---
 .../trimesh_split_vertex.cpp                  | 113 ++++++++++++++++++
 .../trimesh_split_vertex.pro                  |   7 ++
 2 files changed, 120 insertions(+)
 create mode 100644 apps/sample/trimesh_split_vertex/trimesh_split_vertex.cpp
 create mode 100644 apps/sample/trimesh_split_vertex/trimesh_split_vertex.pro

diff --git a/apps/sample/trimesh_split_vertex/trimesh_split_vertex.cpp b/apps/sample/trimesh_split_vertex/trimesh_split_vertex.cpp
new file mode 100644
index 00000000..4c14bd84
--- /dev/null
+++ b/apps/sample/trimesh_split_vertex/trimesh_split_vertex.cpp
@@ -0,0 +1,113 @@
+#include <vector>
+
+#include <vcg/simplex/vertex/base.h>
+#include <vcg/simplex/face/base.h>
+#include <vcg/complex/trimesh/base.h>
+#include <vcg/complex/trimesh/attribute_seam.h>
+
+#include <wrap/io_trimesh/import_ply.h>
+#include <wrap/io_trimesh/export_ply.h>
+
+/*
+  this sample shows how to transfer per wedge attributes from wedges to vertices.
+  during the process new vertices could be created.
+*/
+
+// source mesh type: per-wedge texture coordinates
+class SrcVertex;
+class SrcEdge;
+class SrcFace;
+
+class SrcVertex : public vcg::VertexSimp2   <SrcVertex, SrcEdge, SrcFace, vcg::vertex::Coord3f> { };
+class SrcFace   : public vcg::FaceSimp2     <SrcVertex, SrcEdge, SrcFace, vcg::face::VertexRef, vcg::face::WedgeTexCoord2f> { };
+class SrcMesh   : public vcg::tri::TriMesh  <std::vector<SrcVertex>, std::vector<SrcFace> > { };
+
+
+// destination mesh type: per-vertex texture coordinates
+class DstVertex;
+class DstEdge;
+class DstFace;
+
+class DstVertex : public vcg::VertexSimp2   <DstVertex, DstEdge, DstFace, vcg::vertex::Coord3f, vcg::vertex::TexCoord2f> { };
+class DstFace   : public vcg::FaceSimp2     <DstVertex, DstEdge, DstFace, vcg::face::VertexRef> { };
+class DstMesh   : public vcg::tri::TriMesh  <std::vector<DstVertex>, std::vector<DstFace> > { };
+
+// extract wedge attributes functor.
+// given a source face and a wedge index, this functor extracts all the relevant attributes from the wedge
+// and transfer them to the destination vertex.
+// source and destination meshes are provided to allow for attribute presence checking (.Is*Enabled()).
+inline void ExtractVertex(const SrcMesh & srcMesh, const SrcFace & f, int whichWedge, const DstMesh & dstMesh, DstVertex & v)
+{
+	(void)srcMesh;
+	(void)dstMesh;
+
+	v.P() = f.cP(whichWedge);
+	v.T() = f.cWT(whichWedge);
+}
+
+// sample compare functor.
+// given two destination vertices, this functor tells if they are identical in all relevan attributes.
+// source and destination meshes are provided to allow for attribute presence checking (.Is*Enabled()).
+inline bool CompareVertex(const DstMesh & m, const DstVertex & vA, const DstVertex & vB)
+{
+	(void)m;
+
+	return (vA.cT() == vB.cT());
+}
+
+// sample copy functor.
+// given two destination vertices, this functor is asked to copy all relevan attributes.
+// source and destination meshes are provided to allow for attribute presence checking (.Is*Enabled()).
+inline void CopyVertex(const DstMesh & m, const DstVertex & vSrc, DstVertex & vDst)
+{
+	(void)m;
+
+	vDst.P() = vSrc.cP();
+	vDst.T() = vSrc.cT();
+}
+
+void usage(void)
+{
+	printf("usage : trimesh_split_vertex <src_ply_file_name> <dst_ply_file_name>\n");
+	printf("where : <src_ply_file_name> : source PLY trimesh file name with texture coordinates per wedge\n");
+	printf("        <dst_ply_file_name> : destination PLY trimesh file name with texture coordinates per vertex\n");
+	printf("exit.\n");
+}
+
+int main(int argc, char ** argv)
+{
+	if (argc != 3)
+	{
+		usage();
+		return -1;
+	}
+
+	SrcMesh srcMesh;
+	vcg::tri::io::ImporterPLY<SrcMesh>::Open(srcMesh, argv[1]);
+	if ((srcMesh.vn <= 0) || (srcMesh.fn <= 0))
+	{
+		printf("invalid source mesh file.\n");
+		return -1;
+	}
+	printf("source mesh succesfully loaded.\n");
+
+	DstMesh dstMesh;
+	vcg::tri::AttributeSeam::SplitVertex(srcMesh, dstMesh, ExtractVertex, CompareVertex, CopyVertex);
+	dstMesh.textures = srcMesh.textures;
+	if (vcg::tri::io::ExporterPLY<DstMesh>::Save(dstMesh, argv[2], vcg::tri::io::Mask::IOM_VERTCOORD | vcg::tri::io::Mask::IOM_VERTTEXCOORD) != 0)
+	{
+		printf("cannot save destination mesh file.\n");
+		return -1;
+	}
+	printf("destination mesh succesfully saved.\n");
+
+	printf("\n");
+	printf("statistics:\n");
+	printf("  input mesh vertices count    : %d\n", srcMesh.vn);
+	printf("  input mesh faces count       : %d\n", srcMesh.fn);
+	printf("  splitted mesh vertices count : %d\n", dstMesh.vn);
+	printf("  splitted mesh faces count    : %d\n", dstMesh.fn);
+	printf("\n");
+
+	return 0;
+}
diff --git a/apps/sample/trimesh_split_vertex/trimesh_split_vertex.pro b/apps/sample/trimesh_split_vertex/trimesh_split_vertex.pro
new file mode 100644
index 00000000..6fe90d43
--- /dev/null
+++ b/apps/sample/trimesh_split_vertex/trimesh_split_vertex.pro
@@ -0,0 +1,7 @@
+TARGET = trimesh_split_vertex
+LIBPATH += 
+DEPENDPATH += . 
+INCLUDEPATH += . ../../..
+CONFIG += console stl
+TEMPLATE = app
+SOURCES += trimesh_split_vertex.cpp ../../../wrap/ply/plylib.cpp