216 lines
7.7 KiB
C++
216 lines
7.7 KiB
C++
/****************************************************************************
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* VCGLib o o *
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* Visual and Computer Graphics Library o o *
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* _ O _ *
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* Copyright(C) 2006 \/)\/ *
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* Visual Computing Lab /\/| *
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* ISTI - Italian National Research Council | *
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* \ *
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* All rights reserved. *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License (http://www.gnu.org/licenses/gpl.txt) *
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* for more details. *
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* *
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****************************************************************************/
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#ifndef __VCG_LIB_EXPORTER_SVG
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#define __VCG_LIB_EXPORTER_SVG
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namespace vcg
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{
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namespace tri
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{
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namespace io
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{
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/**
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* SVG Properties.
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*
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* Support class to set the properties of the SVG exporter.
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*/
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class SVGProperties
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{
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// definitions
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public:
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// When multiple meshes are passed, they are arranged in a grid according these two values.
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// the default is two column and enough row. If numRow is not sufficient it is automatically enlarged.
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int numCol;
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int numRow;
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Point2f sizeCm; // The size, in the drawing, of each ViewBox (in cm)
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Point2f marginCm; // how much space between each slice box (in cm)
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Point2f pageSizeCm() // This is automatically computed from the above values
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{
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float xSize = numCol*sizeCm[0] + numCol*marginCm[0] + marginCm[0];
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float ySize = numRow*sizeCm[1] + numRow*marginCm[1] + marginCm[1];
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return Point2f(xSize,ySize);
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}
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Point3f projDir; // Direction of the Projection
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Point3f projUp;
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Point3f projCenter; // the 3d point that after projection will fall exactly in the center of the ViewBox.
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// How the mesh will be scaled.
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// if this value is 0 the bounding box of all the passed meshes will be used to compute the scale and center
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// otherwise it is a scaling factor that is used to place the mesh in a unit cube (-1..1)
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// usually it is 2/bbox.Diag
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float scale;
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// SVG Style Parameters
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int lineWidthPt; // Line width.
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std::string strokeColor; // Stroke color (see StrokeColor).
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std::string strokeLineCap;// Stroke linecap (see StrokeLineCap).
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//Text details
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bool showTextDetails;
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public:
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SVGProperties()
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{
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lineWidthPt = 1;
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strokeColor = "black";
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strokeLineCap = "round";
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// default projection (XZ plane with the z up)
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projDir= Point3f(0.0, 1.0, 0.0);
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projUp = Point3f(0.0, 0.0, 1.0);
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scale=0;
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//viewBox=Point2f(10, 10);
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projCenter=Point3f(0, 0, 0);
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sizeCm=Point2f(10,10);
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marginCm=Point2f(1,1);
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showTextDetails=true;
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numCol=2;
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numRow=10;
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}
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};
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/**
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* SVG exporter.
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*
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* This exporter save a mesh of EdgeMesh type in the SVG format.
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* Most of the features of the SVG format are not supported.
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* The given EdgeMesh is saved as a set lines. The properties
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* of the SVG export can be set through the SVGProp class.
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*/
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template <class EdgeMeshType>
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class ExporterSVG
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{
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public:
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// Standard saving Function
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// just a wrapper to the below
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static bool Save(EdgeMeshType &m, const char *filename, SVGProperties & pro)
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{
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std::vector<EdgeMeshType*> MeshVec;
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MeshVec.push_back(&m);
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return Save(MeshVec,filename,pro);
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}
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// Main saving function
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// save a Multiple Set of Edge Meshes on a single SVG files
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static bool Save(std::vector<EdgeMeshType*> &meshVec, const char *filename, SVGProperties & pro)
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{
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FILE * fpo = fopen(filename,"w");
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if (fpo==NULL) return false;
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WriteXmlHead(fpo, pro);
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for(size_t i=0;i<meshVec.size();++i)
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{
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WriteXmlBody(fpo, *meshVec[i], pro, i );
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}
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fprintf(fpo, "</svg>");
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fclose(fpo);
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return true;
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}
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static void WriteXmlHead(FILE *o, SVGProperties & pro)
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{
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fprintf(o, "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>\n");
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fprintf(o, "<!-- Created with vcg library -->\n");
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fprintf(o, "<svg width=\"%fcm\" height=\"%fcm\" \n",pro.pageSizeCm()[0], pro.pageSizeCm()[1]);
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fprintf(o, " xmlns=\"http://www.w3.org/2000/svg\" \n");
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fprintf(o, " xmlns:xlink=\"http://www.w3.org/1999/xlink\" \n");
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fprintf(o, " xmlns:dc=\"http://purl.org/dc/elements/1.1/\" \n");
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fprintf(o, " xmlns:cc=\"http://web.resource.org/cc/\" \n");
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fprintf(o, " xmlns:rdf=\"http://www.w3.org/1999/02/22-rdf-syntax-ns#\" \n");
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fprintf(o, " xmlns:svg=\"http://www.w3.org/2000/svg\" \n \n");
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fprintf(o, "id=\"svg2\"> \n");
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fprintf(o, " <defs id=\"defs4\"/> \n");
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fprintf(o, " <metadata id=\"metadata7\"> \n");
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fprintf(o, " <rdf:RDF> \n");
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fprintf(o, " <cc:Work rdf:about=\"\"> \n");
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fprintf(o, " <dc:format>image/svg+xml</dc:format> \n");
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fprintf(o, " <dc:type rdf:resource=\"http://purl.org/dc/dcmitype/StillImage\" /> \n");
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fprintf(o, " </cc:Work> \n");
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fprintf(o, " </rdf:RDF> \n");
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fprintf(o, "</metadata> \n \n");
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}
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static void WriteXmlBody(FILE* fpo, EdgeMeshType &mp, SVGProperties &pro, int meshIndex)
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{
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int rowInd = meshIndex / pro.numCol;
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int colInd = meshIndex % pro.numCol;
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fprintf(fpo, " <rect width= \" %fcm \" height= \" %fcm \" x=\"%fcm \" y=\"%fcm \" "
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" style= \" stroke-width:1pt; fill-opacity:0.0; stroke:rgb(0,0,0)\" /> \n",
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pro.sizeCm[0], pro.sizeCm[1], pro.marginCm[0]+colInd*(pro.sizeCm[0]+pro.marginCm[0]), pro.marginCm[1]+rowInd*(pro.sizeCm[1]+pro.marginCm[1]));
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fprintf(fpo, "<g stroke=\"%s\" stroke-linecap=\"%s\" stroke-width = \"%fpt\" > \n", pro.strokeColor.c_str(), pro.strokeLineCap.c_str(),pro.lineWidthPt/100.0f);
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fprintf(fpo, " <svg id = \"SliceNum%d\" viewBox=\"-1000 -1000 2000 2000\" width=\"%fcm\" height=\"%fcm\" x=\"%fcm\" y=\"%fcm\" >\n", meshIndex,pro.sizeCm[0],pro.sizeCm[1],
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pro.marginCm[0]+colInd*(pro.sizeCm[0]+pro.marginCm[0]), pro.marginCm[1]+rowInd*(pro.sizeCm[1]+pro.marginCm[1]) );
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// Main loop of edge printing
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typename EdgeMeshType::EdgeIterator i;
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// XY projection.
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// It is a classcial ortho projection
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// eg it resolves to a rotation Matrix such that
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// - the passed projDir become the z axis
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// - the passed projUp lie on the upper YZ plane.
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// First Step align projDir to Z
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Matrix33f rotM = RotationMatrix(pro.projDir,Point3f(0,0,1),false);
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Point3f rotatedUp = rotM * pro.projUp;
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Point3f rotCenter = rotM * pro.projCenter;
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float scale = pro.scale;
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if(scale==0) scale = 2.0/mp.bbox.Diag();
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for (i = mp.edge.begin(); i != mp.edge.end(); ++i) if(!(*i).IsD())
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{
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Point3f p0 = (-rotCenter + rotM * ((*i).V(0)->P()))*scale*1000;
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Point3f p1 = (-rotCenter + rotM * ((*i).V(1)->P()))*scale*1000;
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fprintf(fpo, " <line x1=\"%f\" y1=\"%f\" x2=\"%f\" y2=\"%f\" />\n", p0[0],p0[1],p1[0],p1[1]);
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}
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fprintf(fpo, " </svg>\n");
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fprintf(fpo, "</g>\n");
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}
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};
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}; // namespace io
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}; // namespace edge
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}; // namespace vcg
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#endif // __VCG_LIB_EXPORTER_SVG
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