From 0ba39b3669fc0bce77cd2623ed12c90d34c24a46 Mon Sep 17 00:00:00 2001
From: josh <josh@bd8a9e45-a331-0410-811e-c64571078777>
Date: Mon, 28 Jan 2008 01:30:29 +0000
Subject: [PATCH] materials rendering colors, still need texture support

git-svn-id: svn://anubis/misc/wfobj@23 bd8a9e45-a331-0410-811e-c64571078777
---
 WFMtl.cc | 108 +++++++++++++++++++++++++++++++++++++++++++++++++++++--
 WFMtl.hh |   4 ++-
 WFObj.cc |   1 +
 3 files changed, 110 insertions(+), 3 deletions(-)

diff --git a/WFMtl.cc b/WFMtl.cc
index e77f27e..6c588bd 100644
--- a/WFMtl.cc
+++ b/WFMtl.cc
@@ -20,6 +20,7 @@ void WFMtl::clear()
 {
 	m_data = map< string, vector< vector<string> > >();
 	m_currentMaterialName = "";
+	m_attributesPushed = false;
 }
 
 int WFMtl::filesize(const char * filename)
@@ -77,6 +78,7 @@ bool WFMtl::load(const string & filename)
 			}
 			cout << endl;
 		}
+		it++;
 	}
 	/* END DEBUG */
 
@@ -134,7 +136,103 @@ void WFMtl::renderBegin(const string & mtlname)
 	map< string, vector< vector<string> > >::iterator it = m_data.find(mtlname);
 	if (it == m_data.end())
 		return;
-	/* TODO: draw the material at it->second */
+	vector< vector<string> > & stmts = it->second;
+	int num_stmts = stmts.size();
+	bool foundTexture = false;
+	bool didSomething = false;
+	for (int i = 0; i < num_stmts; i++)
+	{
+		string & type = stmts[i][0];
+		if (type == "Ka")				/* set ambient color */
+		{
+			if ( (stmts[i].size() == 4) && (stmts[i][1] != "spectral") )
+			{
+				pushAttributes();
+				float mat[4] = {0.0f, 0.0f, 0.0f, 1.0f};
+				for (int j = 0; j < 3; j++)
+					sscanf(stmts[i][j+1].c_str(), "%f", &mat[j]);
+#ifdef DEBUGGL
+				cout << " glMaterialfv(GL_FRONT, GL_AMBIENT, {";
+				for (int j = 0; j < 4; j++)
+					cout << mat[j] << (j < 3 ? ", " : "})");
+				cout << endl;
+#endif
+				glMaterialfv(GL_FRONT, GL_AMBIENT, mat);
+				didSomething = true;
+			}
+		}
+		else if (type == "Kd")			/* set diffuse color */
+		{
+			if ( (stmts[i].size() == 4) && (stmts[i][1] != "spectral") )
+			{
+				pushAttributes();
+				float mat[4] = {0.0f, 0.0f, 0.0f, 1.0f};
+				for (int j = 0; j < 3; j++)
+					sscanf(stmts[i][j+1].c_str(), "%f", &mat[j]);
+#ifdef DEBUGGL
+				cout << " glMaterialfv(GL_FRONT, GL_DIFFUSE, {";
+				for (int j = 0; j < 4; j++)
+					cout << mat[j] << (j < 3 ? ", " : "})");
+				cout << endl;
+#endif
+				glMaterialfv(GL_FRONT, GL_DIFFUSE, mat);
+				didSomething = true;
+			}
+		}
+		else if (type == "Ks")			/* set specular color */
+		{
+			if ( (stmts[i].size() == 4) && (stmts[i][1] != "spectral") )
+			{
+				pushAttributes();
+				float mat[4] = {0.0f, 0.0f, 0.0f, 1.0f};
+				for (int j = 0; j < 3; j++)
+					sscanf(stmts[i][j+1].c_str(), "%f", &mat[j]);
+#ifdef DEBUGGL
+				cout << " glMaterialfv(GL_FRONT, GL_SPECULAR, {";
+				for (int j = 0; j < 4; j++)
+					cout << mat[j] << (j < 3 ? ", " : "})");
+				cout << endl;
+#endif
+				glMaterialfv(GL_FRONT, GL_SPECULAR, mat);
+				didSomething = true;
+			}
+		}
+		else if (type == "map_Kd")		/* load a diffuse texture */
+		{
+			/* TODO: figure out how i want to load the texture */
+			foundTexture = true;
+			didSomething = true;
+		}
+	}
+	if (didSomething)
+	{
+		pushAttributes();
+		if (foundTexture)
+		{
+#ifdef DEBUGGL
+			cout << " glEnable(GL_TEXTURE_2D)" << endl;
+#endif
+			glEnable(GL_TEXTURE_2D);
+		}
+		else
+		{
+#ifdef DEBUGGL
+			cout << " glDisable(GL_TEXTURE_2D)" << endl;
+#endif
+			glDisable(GL_TEXTURE_2D);
+		}
+	}
+}
+
+void WFMtl::pushAttributes()
+{
+	if (m_attributesPushed)
+		return;
+	m_attributesPushed = true;
+#ifdef DEBUGGL
+	cout << " glPushAttrib(GL_LIGHTING_BIT | GL_TEXTURE_BIT)" << endl;
+#endif
+	glPushAttrib(GL_LIGHTING_BIT | GL_TEXTURE_BIT);
 }
 
 void WFMtl::renderEnd(const string & mtlname)
@@ -142,6 +240,12 @@ void WFMtl::renderEnd(const string & mtlname)
 	map< string, vector< vector<string> > >::iterator it = m_data.find(mtlname);
 	if (it == m_data.end())
 		return;
-	/* TODO: end the material at it->second */
+	if (m_attributesPushed)
+	{
+#ifdef DEBUGGL
+		cout << " glPopAttrib()" << endl;
+#endif
+		glPopAttrib();
+	}
 }
 
diff --git a/WFMtl.hh b/WFMtl.hh
index df58a13..281127a 100644
--- a/WFMtl.hh
+++ b/WFMtl.hh
@@ -18,8 +18,10 @@ private:
 	int filesize(const char * filename);
 	void processInputLine(const std::string & input);
 	std::string stripFirstToken(std::string & input);
+	void pushAttributes();
 
 	/* variables */
 	std::map< std::string, std::vector< std::vector<std::string> > > m_data;
-	string m_currentMaterialName;
+	std::string m_currentMaterialName;
+	bool m_attributesPushed;
 };
diff --git a/WFObj.cc b/WFObj.cc
index 7e44756..f9ecc0a 100644
--- a/WFObj.cc
+++ b/WFObj.cc
@@ -10,6 +10,7 @@
 #include <iostream>
 #include <fstream>
 #include "WFObj.hh"
+#include "WFMtl.hh"
 using namespace std;
 
 #define WHITESPACE " \n\r\t\v"