From a92dc36d721806f8613a7aa531eca89162de504a Mon Sep 17 00:00:00 2001
From: Stijn Buys <ingar@osirion.org>
Date: Fri, 26 Nov 2010 14:12:53 +0000
Subject: Read .map patch definitions into model quads (without triangulation)

---
 src/model/mapfile.cc | 191 +++++++++++++++++++++++++++++++++++++++++++++------
 1 file changed, 171 insertions(+), 20 deletions(-)

(limited to 'src/model')

diff --git a/src/model/mapfile.cc b/src/model/mapfile.cc
index 84fd108..deb22a5 100644
--- a/src/model/mapfile.cc
+++ b/src/model/mapfile.cc
@@ -215,43 +215,194 @@ bool MapFile::read_patchdef()
 {
 	char data[1024];
 	memset(data, 0, sizeof(data));
-	size_t count = 0;
+	size_t columns = 0;
+	size_t rows = 0;
+	std::string materialname;
 
 	// first line: texture name
-	if (!mapfile_ifs.getline(data, 1023))
+	if (!mapfile_ifs.getline(data, 1023)) {
 		return false;
-	else
+	} else {
 		line_number++;
+		
+		std::istringstream linestream(data);
+		if (!(linestream >> materialname)) {
+			return false;
+		}		
+	}
 
 	// second line: "( a b c d e )"
-	if (!mapfile_ifs.getline(data, 1023))
+	// "( rows columns unknown unknown unknown )"
+		
+	if (!mapfile_ifs.getline(data, 1023)) {
 		return false;
-	else
+	} else {
 		line_number++;
-
-	// third line: "("
-	if (!mapfile_ifs.getline(data, 1023))
+		
+		std::istringstream linestream(data);
+		std::string word;
+		
+		if (!(linestream >> word))
+			return false;
+		
+		if (word.compare("(") != 0)
+			return false;
+		
+		if (!(linestream >> rows >> columns))
+			return false;
+	}
+	
+	// leading line: "("
+	if (!mapfile_ifs.getline(data, 1023)) {
 		return false;
-	else
+	} else {
 		line_number++;
+		
+		std::istringstream linestream(data);
+		std::string word;
+		
+		if (!(linestream >> word))
+			return false;
+		
+		if (word.compare("(") != 0)
+			return false;
+	}
 
-	while (mapfile_ifs.getline(data, 1023)) {
+	// patch definitions: 
+	// 'column' is the number of lines to be read
+	// each line has 'row' vertices
+	
+	// sanity check
+	if ((columns < 2) || (rows < 2) || (columns >= 1024) || (rows >= 1024)) {
+		return false;
+	}
+	
+	math::Vector3f patchvertices[rows][columns];
+	
+	// read rows
+	for (size_t r = 0; r < rows; r++) {
+		if(!mapfile_ifs.getline(data, 1023)) {
+			return false;
+		}
 		line_number++;
-
+		
 		std::istringstream linestream(data);
-		std::string firstword;
-
-		if (linestream >> firstword) {
-			if (firstword.compare(")") == 0) {
-				//con_debug << "    patchDef2 with " << count << " lines" << std::endl;
-				return true;
-			} else {
-				count ++;
+		std::string word;
+		
+		if (!(linestream >> word)) {
+			//con_debug << "    Error reading row begin" << std::endl;
+			return false;
+		}
+		
+		if (word.compare("(") != 0) {
+			//con_debug << "    Error reading row begin: word contains '" << word << "'" << std::endl;
+			return false;
+		}
+		
+		// read columns
+		for (size_t c = 0; c < columns; c++) {
+			float x, y, z, tx, ty;
+			
+			//con_debug << "    Reading patch row " << r << " column " << c << std::endl;
+			
+			if (!(linestream >> word)) {
+				return false;
+			}
+			if (word.compare("(") != 0) {
+				//con_debug << "    Error reading column begin: word contains '" << word << "'" << std::endl;
+				return false;
+			}
+			
+			if (!(linestream >> x >> y >> z >> tx >> ty)) {
+				//con_debug << "    Error reading column data" << std::endl;
+				return false;
+			}
+			
+			if (!(linestream >> word)) {
+				//con_debug << "    Error reading column end" << std::endl;
+				return false;
+			}		
+			if (word.compare(")") != 0) {
+				//con_debug << "    Error reading column end: word contains '" << word << "'" << std::endl;
+				return false;
 			}
+			
+			patchvertices[r][c].assign(x, y, z);
+		}
+		
+		if (!(linestream >> word)) {
+			//con_debug << "    Error reading row end" << std::endl;
+			return false;
+		}
+		if (word.compare(")") != 0) {
+			//con_debug << "    Error reading row end: word contains '" << word << "'" << std::endl;
+			return false;
+		}
+		
+	}
+	
+	// trailing line: ")"
+	if(!mapfile_ifs.getline(data, 1023)) {
+		return false;
+	} else {
+		line_number++;
+		
+		std::istringstream linestream(data);
+		std::string word;
+		
+		if (!(linestream >> word)) {
+			//con_debug << "Error reading trialing line ')'" << std::endl;
+			return false;
+		}
+		
+		if (word.compare(")") != 0) {
+			//con_debug << "No trialing line ')'" << std::endl;
+			return false;
+		}
+	}
+	
+	// find the material for this patch
+	Material *material = Material::find("textures/" + materialname);
+	if (!material) {
+		material = new Material("textures/" + materialname);
+		Material::add(material);
+		material->set_texture(material->name());
+	}
+					
+	// find the primitives for the current material, 
+	// allocate a new one if necessary
+	Primitives *primitives = 0;
+
+	Materials::iterator mit = map_materials.find(material);
+	if (mit == map_materials.end()) {
+		primitives = new Primitives(material);
+		map_materials[material] = primitives;
+	} else {
+		primitives = (*mit).second;
+	}
+	
+	// ignore materials with the 'Ignore' flag set
+	if ((material->flags() & Material::Ignore) == Material::Ignore) {
+		return true;
+	}
+	
+	// load patch data into the model geometry
+	// TODO triangulate, assign texture coordinates
+	for (size_t r = 0; r < rows-1; r++) {
+		for (size_t c = 0; c < columns -1; c++) {
+			Quad *quad = new Quad(
+				patchvertices[r][c] * SCALE, 
+				patchvertices[r][c+1] * SCALE, 
+				patchvertices[r+1][c+1] * SCALE, 
+				patchvertices[r+1][c] * SCALE, 
+				math::normal(patchvertices[r][c], patchvertices[r][c+1], patchvertices[r+1][c+1])
+			);
+			primitives->add_quad(quad);
 		}
 	}
 
-	return false;
+	//con_debug << "  patchDef2 with " << columns << " columns " << rows << " rows" << std::endl;
+	return true;
 }
 
 bool MapFile::getline()
-- 
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