vmap/plugins/brushexport/export.cpp

#include "export.h"
#include "globaldefs.h"
#include "debugging/debugging.h"
#include "ibrush.h"
#include "iscenegraph.h"
#include "iselection.h"
#include "stream/stringstream.h"
#include "stream/textfilestream.h"

#include <map>

// this is very evil, but right now there is no better way
#include "../../src/brush.h"

// for limNames
const int MAX_MATERIAL_NAME = 20;

/*
    Abstract baseclass for modelexporters
    the class collects all the data which then gets
    exported through the WriteToFile method.
 */
class ExportData {
public:
ExportData(const std::set<std::string> &ignorelist, collapsemode mode, bool limNames, bool objs);

virtual ~ExportData(void);

virtual void BeginBrush(Brush &b);

virtual void AddBrushFace(Face &f);

virtual void EndBrush(void);

virtual bool WriteToFile(const std::string &path, collapsemode mode) const = 0;

protected:

// a group of faces
class group {
public:
std::string name;
std::list<const Face *> faces;
};

std::list<group> groups;

private:

// "textures/common/caulk" -> "caulk"
void GetShaderNameFromShaderPath(const char *path, std::string &name);

group *current;
collapsemode mode;
const std::set<std::string> &ignorelist;
};

ExportData::ExportData(const std::set<std::string> &_ignorelist, collapsemode _mode, bool _limNames, bool _objs)
	: mode(_mode),
	ignorelist(_ignorelist)
{
	current = 0;

	// in this mode, we need just one group
	if (mode == COLLAPSE_ALL) {
		groups.push_back(group());
		current = &groups.back();
		current->name = "all";
	}
}

ExportData::~ExportData(void)
{

}

void ExportData::BeginBrush(Brush &b)
{
	// create a new group for each brush
	if (mode == COLLAPSE_NONE) {
		groups.push_back(group());
		current = &groups.back();

		StringOutputStream str(256);
		str << "Brush" << (const unsigned int) groups.size();
		current->name = str.c_str();
	}
}

void ExportData::EndBrush(void)
{
	// all faces of this brush were on the ignorelist, discard the emptygroup
	if (mode == COLLAPSE_NONE) {
		ASSERT_NOTNULL(current);
		if (current->faces.empty()) {
			groups.pop_back();
			current = 0;
		}
	}
}

void ExportData::AddBrushFace(Face &f)
{
	std::string shadername;
	GetShaderNameFromShaderPath(f.GetShader(), shadername);

	// ignore faces from ignore list
	if (ignorelist.find(shadername) != ignorelist.end()) {
		return;
	}

	if (mode == COLLAPSE_BY_MATERIAL) {
		// find a group for this material
		current = 0;
		const std::list<group>::iterator end(groups.end());
		for (std::list<group>::iterator it(groups.begin()); it != end; ++it) {
			if (it->name == shadername) {
				current = &(*it);
			}
		}

		// no group found, create one
		if (!current) {
			groups.push_back(group());
			current = &groups.back();
			current->name = shadername;
		}
	}

	ASSERT_NOTNULL(current);

	// add face to current group
	current->faces.push_back(&f);

#if GDEF_DEBUG
	globalOutputStream() << "Added Face to group " << current->name.c_str() << "\n";
#endif
}

void ExportData::GetShaderNameFromShaderPath(const char *path, std::string &name)
{
	std::string tmp(path);

	size_t last_slash = tmp.find_last_of("/");

	if (last_slash != std::string::npos && last_slash == (tmp.length() - 1)) {
		name = path;
	} else {
		name = tmp.substr(last_slash + 1, tmp.length() - last_slash);
	}

#if GDEF_DEBUG
	globalOutputStream() << "Last: " << (const unsigned int) last_slash << " " << "length: "
	                     << (const unsigned int) tmp.length() << "Name: " << name.c_str() << "\n";
#endif
}

/*
    Exporter writing facedata as wavefront object
 */
class ExportDataAsWavefront : public ExportData {
private:
bool expmat;
bool limNames;
bool objs;

public:
ExportDataAsWavefront(const std::set<std::string> &_ignorelist, collapsemode _mode, bool _expmat, bool _limNames,
                      bool _objs)
	: ExportData(_ignorelist, _mode, _limNames, _objs)
{
	expmat = _expmat;
	limNames = _limNames;
	objs = _objs;
}

bool WriteToFile(const std::string &path, collapsemode mode) const;
};

bool ExportDataAsWavefront::WriteToFile(const std::string &path, collapsemode mode) const
{
	std::string objFile = path;

	if (path.compare(path.length() - 4, 4, ".obj") != 0) {
		objFile += ".obj";
	}

	std::string mtlFile = objFile.substr(0, objFile.length() - 4) + ".mtl";

	std::set<std::string> materials;

	TextFileOutputStream out(objFile.c_str());

	if (out.failed()) {
		globalErrorStream() << "Unable to open file\n";
		return false;
	}

	out
	        << "# Wavefront Objectfile exported with radiants brushexport plugin 3.0 by Thomas 'namespace' Nitschke, spam@codecreator.net\n\n";

	if (expmat) {
		size_t last = mtlFile.find_last_of("//");
		std::string mtllib = mtlFile.substr(last + 1, mtlFile.size() - last).c_str();
		out << "mtllib " << mtllib.c_str() << "\n";
	}

	unsigned int vertex_count = 0;

	const std::list<ExportData::group>::const_iterator gend(groups.end());
	for (std::list<ExportData::group>::const_iterator git(groups.begin()); git != gend; ++git) {
		typedef std::multimap<std::string, std::string> bm;
		bm brushMaterials;
		typedef std::pair<std::string, std::string> String_Pair;

		const std::list<const Face *>::const_iterator end(git->faces.end());

		// submesh starts here
		if (objs) {
			out << "\no ";
		} else {
			out << "\ng ";
		}
		out << git->name.c_str() << "\n";

		// material
		if (expmat && mode == COLLAPSE_ALL) {
			out << "usemtl material" << "\n\n";
			materials.insert("material");
		}

		for (std::list<const Face *>::const_iterator it(git->faces.begin()); it != end; ++it) {
			const Winding &w((*it)->getWinding());

			// vertices
			for (size_t i = 0; i < w.numpoints; ++i) {
				out << "v " << FloatFormat(w[i].vertex.x(), 1, 6) << " " << FloatFormat(w[i].vertex.z(), 1, 6) << " "
				    << FloatFormat(w[i].vertex.y(), 1, 6) << "\n";
			}
		}
		out << "\n";

		for (std::list<const Face *>::const_iterator it(git->faces.begin()); it != end; ++it) {
			const Winding &w((*it)->getWinding());

			// texcoords
			for (size_t i = 0; i < w.numpoints; ++i) {
				out << "vt " << FloatFormat(w[i].texcoord.x(), 1, 6) << " " << FloatFormat(w[i].texcoord.y(), 1, 6)
				    << "\n";
			}
		}

		for (std::list<const Face *>::const_iterator it(git->faces.begin()); it != end; ++it) {
			const Winding &w((*it)->getWinding());

			// faces
			StringOutputStream faceLine(256);
			faceLine << "\nf";
			for (size_t i = 0; i < w.numpoints; ++i, ++vertex_count) {
				faceLine << " " << vertex_count + 1 << "/" << vertex_count + 1;
			}

			if (mode != COLLAPSE_ALL) {
				materials.insert((*it)->getShader().getShader());
				brushMaterials.insert(String_Pair((*it)->getShader().getShader(), faceLine.c_str()));
			} else {
				out << faceLine.c_str();
			}
		}

		if (mode != COLLAPSE_ALL) {
			std::string lastMat;
			std::string mat;
			std::string faces;

			for (bm::iterator iter = brushMaterials.begin(); iter != brushMaterials.end(); iter++) {
				mat = (*iter).first.c_str();
				faces = (*iter).second.c_str();

				if (mat != lastMat) {
					if (limNames && mat.size() > MAX_MATERIAL_NAME) {
						out << "\nusemtl " << mat.substr(mat.size() - MAX_MATERIAL_NAME, mat.size()).c_str();
					} else {
						out << "\nusemtl " << mat.c_str();
					}
				}

				out << faces.c_str();
				lastMat = mat;
			}
		}

		out << "\n";
	}

	if (expmat) {
		TextFileOutputStream outMtl(mtlFile.c_str());
		if (outMtl.failed()) {
			globalErrorStream() << "Unable to open material file\n";
			return false;
		}

		outMtl << "# Wavefront material file exported with NetRadiants brushexport plugin.\n";
		outMtl << "# Material Count: " << (const Unsigned) materials.size() << "\n\n";
		for (std::set<std::string>::const_iterator it(materials.begin()); it != materials.end(); ++it) {
			if (limNames && it->size() > MAX_MATERIAL_NAME) {
				outMtl << "newmtl " << it->substr(it->size() - MAX_MATERIAL_NAME, it->size()).c_str() << "\n";
			} else {
				outMtl << "newmtl " << it->c_str() << "\n";
			}
		}
	}

	return true;
}


class ForEachFace : public BrushVisitor {
public:
ForEachFace(ExportData &_exporter)
	: exporter(_exporter)
{
}

void visit(Face &face) const
{
	exporter.AddBrushFace(face);
}

private:
ExportData &exporter;
};

class ForEachSelected : public SelectionSystem::Visitor {
public:
ForEachSelected(ExportData &_exporter)
	: exporter(_exporter)
{
}

void visit(scene::Instance &instance) const
{
	BrushInstance *bptr = InstanceTypeCast<BrushInstance>::cast(instance);
	if (bptr) {
		Brush &brush(bptr->getBrush());

		exporter.BeginBrush(brush);
		ForEachFace face_vis(exporter);
		brush.forEachFace(face_vis);
		exporter.EndBrush();
	}
}

private:
ExportData &exporter;
};

bool ExportSelection(const std::set<std::string> &ignorelist, collapsemode m, bool exmat, const std::string &path,
                     bool limNames, bool objs)
{
	ExportDataAsWavefront exporter(ignorelist, m, exmat, limNames, objs);

	ForEachSelected vis(exporter);
	GlobalSelectionSystem().foreachSelected(vis);

	return exporter.WriteToFile(path, m);
}