Texture Binding with Material Class

#include <windows.h>		// Header File For Windows
#include <stdio.h>			// Header File For Standard Input/Output
#include <gl\gl.h>			// Header File For The OpenGL32 Library
#include <gl\glu.h>			// Header File For The GLu32 Library
#include <gl\glaux.h>		// Header File For The Glaux Library

#include <ios>
#include <iostream>
#include <string>
#include <tchar.h>
#include <windowsx.h>
#include <fstream>

#include <vector>

#include "Material.h"

using namespace std;

HDC			hDC=NULL;		// Private GDI Device Context
HGLRC		hRC=NULL;		// Permanent Rendering Context
HWND		hWnd=NULL;		// Holds Our Window Handle
HINSTANCE	hInstance;		// Holds The Instance Of The Application

bool	active=TRUE;		// Window Active Flag Set To TRUE By Default

// Log file
ofstream logFile("C:\\Documents and Settings\\Dave\\My Documents\\Visual Studio Projects\\TextureManager\\Debug\\log.txt", ios::out);

// Materials Container
std::vector<Material> materials;

LRESULT	CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);	// Declaration For WndProc

// Number of textures loaded
int numTexture = 0;

void checkGlErrors() {
	int glError = 1;
	while (glError != 0) {
		glError = glGetError();
		if (glError != 0) {
			logFile << "[ERROR] glGetError = " << glError << endl;
		}
	}
}

// Call to load a Bitmap
int loadBitmap(const char *filename) 
{
	logFile << "	loadBitmap called: file name = " << filename << endl;
    FILE *file;				// File pointer
    unsigned char *texture; // The pointer to the memory in which we will load the texture
     
    // windows.h gives us these types to work with the Bitmap files
    BITMAPFILEHEADER fileheader; 
    BITMAPINFOHEADER infoheader;
    RGBTRIPLE rgb;

	// Increment the texture count
    numTexture++; 
	logFile << "		numTexture = " << numTexture << endl;

	// Open the file for reading
	if ( (file = fopen(filename, "rb")) == NULL) {
		logFile << "		COULDN'T OPEN FILE" << endl;
		return (-1); 
	} else {
		logFile << "		The file has been opened for reading." << endl;
	}
    
	// Read the fileheader
    fread(&fileheader, sizeof(fileheader), 1, file); 
    
	// Jump the fileheader
    fseek(file, sizeof(fileheader), SEEK_SET); 
	// and read the infoheader
    fread(&infoheader, sizeof(infoheader), 1, file); 

    // Allocate the memory for our image (width * height * color deep)
    texture = (byte *) malloc(infoheader.biWidth * infoheader.biHeight * 4);
    // And fill it with zeros
    memset(texture, 0, infoheader.biWidth * infoheader.biHeight * 4);
 
    // Read in the image
	int j = 0;
    for (int i = 0; i < infoheader.biWidth*infoheader.biHeight; ++i) {            
        // We load an RGB value from the file
        fread(&rgb, sizeof(rgb), 1, file); 

        // And store it
        texture[j+0] = rgb.rgbtRed;		// Red component
        texture[j+1] = rgb.rgbtGreen;	// Green component
        texture[j+2] = rgb.rgbtBlue;	// Blue component
        texture[j+3] = 255;				// Alpha value
        j += 4;							// Go to the next position
    }

	// Close the file stream
    fclose(file); 
     
	// Bind the ID texture
    glBindTexture(GL_TEXTURE_2D, numTexture); 

	// Define the 2d texture
    glTexImage2D(GL_TEXTURE_2D, 0, 4, infoheader.biWidth, infoheader.biHeight, 0, GL_RGBA, GL_UNSIGNED_BYTE, texture);

    // Sets the texture parameters
    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); 
    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); 
    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);

	// Use only the texture map
    glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE); 

    // And create 2d mipmaps for the minifying function
    gluBuild2DMipmaps(GL_TEXTURE_2D, 4, infoheader.biWidth, infoheader.biHeight, GL_RGBA, GL_UNSIGNED_BYTE, texture);

	// Free the memory used to load the texture
    free(texture); 

	checkGlErrors();

	// Returns texture ID for the new texture
	int isTexture = glIsTexture(numTexture);
	logFile << "		is a texture ? = " << isTexture << endl;
    return (numTexture); 
}

// Load an Alias Wavefront .obj Material Library
bool loadMaterialFile(const char filename[]) {

	std::ifstream ifs(filename);

	if (ifs) {
		Material *pmat = 0;

		while (!ifs.eof()) {

			std::string s;
			ifs >> s;

			if (s == "newmtl") {
				Material mat;
				ifs >> mat.name;
				materials.push_back(mat);
				pmat = &(materials[materials.size()-1]);

			} else if (s == "map_Kd") {

				char buffer[512];
				char* ptr = buffer;
				ifs.getline(buffer,512);
				while (*ptr == ' ' || *ptr == '\t') {
					++ptr;
				}
				
				pmat->diffuseTextureName = ptr;
				pmat->loadDiffuseTexture();
			}
		}
		ifs.close();
		return true;
	}
	logFile << "File not Found!!!" << endl;

	return false;
}

// Resize the GL Scene
GLvoid ReSizeGLScene(GLsizei width, GLsizei height)		
{
	// Prevent A Divide By Zero By
	if (height==0)										
	{
		height=1;
	}

	// Reset The Current Viewport
	glViewport(0,0,width,height);						

	// Select and Reset The Projection Matrix
	glMatrixMode(GL_PROJECTION);						
	glLoadIdentity();									

	// Calculate The Aspect Ratio Of The Window
	gluPerspective(75.0f,(GLfloat)width/(GLfloat)height,0.1f,100.0f);

	// Select and Reset The Modelview Matrix
	glMatrixMode(GL_MODELVIEW);
	glLoadIdentity();
}

// All Setup For OpenGL Goes Here
int InitGL(GLvoid)										
{
	glEnable(GL_TEXTURE_2D);							// Enable Texture Mapping ( NEW )
	glShadeModel(GL_SMOOTH);							// Enable Smooth Shading
	glClearColor(0.0f, 0.0f, 0.0f, 0.5f);				// Black Background
	glClearDepth(1.0f);									// Depth Buffer Setup
	glEnable(GL_DEPTH_TEST);							// Enables Depth Testing
	glDepthFunc(GL_LEQUAL);								// The Type Of Depth Testing To Do
	glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);	// Really Nice Perspective Calculations

	// load material file
	if (!loadMaterialFile("squares2.mtl")) {
		logFile << "Materials NOT loaded." << endl;
	} else {
    	logFile << "Materials loaded - materials.size() = " << materials.size() << endl;
	}

	// Print out the loaded materials props of interest
	for (int i = 0; i < materials.size(); ++i) {
		logFile << "Material " << i << ":" << endl;
		logFile << "    name = " << materials.name << endl;
		logFile << "    diffuseTextureName = " << materials.diffuseTextureName << endl;
		logFile << "    diffuseTextureId = " << materials.diffuseTextureId << endl;
		int isTexture = glIsTexture(materials.diffuseTextureId);
		logFile << "    isTexture? = " << isTexture << endl;
	}

	// Check for errors
	checkGlErrors();

	// Initialization completed OK
	return TRUE;	
}

// Draw the scene
// Render 4 quads - each with a different Material
int DrawGLScene(GLvoid)	
{
	checkGlErrors();

	// Clear The Screen And The Depth Buffer and Reset The View
	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
	glLoadIdentity();

	// move the camera a little
	glTranslatef(0.0f,0.0f,-5.0f);

	int isTexture = glIsTexture(materials[0].diffuseTextureId);
	logFile << "  glIsTexture? materials[0] = " << isTexture << endl;
	materials[0].apply();
	glBegin(GL_QUADS);
		glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, -1.0f,  0.0f);
		glTexCoord2f(1.0f, 0.0f); glVertex3f( 0.0f, -1.0f,  0.0f);
		glTexCoord2f(1.0f, 1.0f); glVertex3f( 0.0f,  0.0f,  0.0f);
		glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f,  0.0f,  0.0f);
	glEnd();

	isTexture = glIsTexture(materials[1].diffuseTextureId);
	logFile << "  glIsTexture? materials[1] = " << isTexture << endl;
	materials[1].apply();
	glBegin(GL_QUADS);
		glTexCoord2f(0.0f, 0.0f); glVertex3f(0.0f, 0.0f,  1.0f);
		glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f, 0.0f,  1.0f);
		glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f,  1.0f,  1.0f);
		glTexCoord2f(0.0f, 1.0f); glVertex3f(0.0f,  1.0f,  1.0f);		
	glEnd();

	return TRUE;
}

// Properly Kill The Window
GLvoid KillGLWindow(GLvoid)								
{
	// Do We Have A Rendering Context?
	if (hRC)											
	{
		// Are We Able To Release The DC And RC Contexts?
		if (!wglMakeCurrent(NULL,NULL))					
		{
			MessageBox(NULL,"Release Of DC And RC Failed.","SHUTDOWN ERROR",MB_OK | MB_ICONINFORMATION);
		}

		// Are We Able To Delete The RC?
		if (!wglDeleteContext(hRC))						
		{
			MessageBox(NULL,"Release Rendering Context Failed.","SHUTDOWN ERROR",MB_OK | MB_ICONINFORMATION);
		}
		hRC = NULL;
	}
	// Are We Able To Release The DC
	if (hDC && !ReleaseDC(hWnd,hDC))					
	{
		MessageBox(NULL,"Release Device Context Failed.","SHUTDOWN ERROR",MB_OK | MB_ICONINFORMATION);
		hDC = NULL;
	}
	// Are We Able To Destroy The Window?
	if (hWnd && !DestroyWindow(hWnd))					
	{
		MessageBox(NULL,"Could Not Release hWnd.","SHUTDOWN ERROR",MB_OK | MB_ICONINFORMATION);
		hWnd = NULL;
	}
	// Are We Able To Unregister Class
	if (!UnregisterClass("OpenGL",hInstance))			
	{
		MessageBox(NULL,"Could Not Unregister Class.","SHUTDOWN ERROR",MB_OK | MB_ICONINFORMATION);
		hInstance = NULL;
	}
}

// Create an OpenGL Window 
BOOL CreateGLWindow(char* title, int width, int height, int bits, bool fullscreenflag)
{

	logFile << "CreateGLWindow called." << endl;

	GLuint		PixelFormat;			// Holds The Results After Searching For A Match
	WNDCLASS	wc;						// Windows Class Structure
	DWORD		dwExstyle;				// Window Extended style
	DWORD		dwstyle;				// Window style
	RECT		WindowRect;				// Grabs Rectangle Upper Left / Lower Right Values
	WindowRect.left=(long)0;			// Set Left Value To 0
	WindowRect.right=(long)width;		// Set Right Value To Requested Width
	WindowRect.top=(long)0;				// Set Top Value To 0
	WindowRect.bottom=(long)height;		// Set Bottom Value To Requested Height

	hInstance			= GetModuleHandle(NULL);				// Grab An Instance For Our Window
	wc.style			= CS_HREDRAW | CS_VREDRAW | CS_OWNDC;	// Redraw On Size, And Own DC For Window.
	wc.lpfnWndProc		= (WNDPROC) WndProc;					// WndProc Handles Messages
	wc.cbClsExtra		= 0;									// No Extra Window Data
	wc.cbWndExtra		= 0;									// No Extra Window Data
	wc.hInstance		= hInstance;							// Set The Instance
	wc.hIcon			= LoadIcon(NULL, IDI_WINLOGO);			// Load The Default Icon
	wc.hCursor			= LoadCursor(NULL, IDC_ARROW);			// Load The Arrow Pointer
	wc.hbrBackground	= NULL;									// No Background Required For GL
	wc.lpszMenuName		= NULL;									// We Don't Want A Menu
	wc.lpszClassName	= "OpenGL";								// Set The Class Name

	if (!RegisterClass(&wc))									// Attempt To Register The Window Class
	{
		MessageBox(NULL,"Failed To Register The Window Class.","ERROR",MB_OK|MB_ICONEXCLAMATION);
		return FALSE;											// Return FALSE
	}

	dwExstyle=WS_EX_APPWINDOW | WS_EX_WINDOWEDGE;			// Window Extended style
	dwstyle=WS_OVERLAPPEDWINDOW;							// Windows style

	AdjustWindowRectEx(&WindowRect, dwstyle, FALSE, dwExstyle);		// Adjust Window To True Requested Size

	// Create The Window
	if (!(hWnd=CreateWindowEx(	dwExstyle,							// Extended style For The Window
								"OpenGL",							// Class Name
								title,								// Window Title
								dwstyle |							// Defined Window style
								WS_CLIPSIBLINGS |					// Required Window style
								WS_CLIPCHILDREN,					// Required Window style
								0, 0,								// Window Position
								WindowRect.right-WindowRect.left,	// Calculate Window Width
								WindowRect.bottom-WindowRect.top,	// Calculate Window Height
								NULL,								// No Parent Window
								NULL,								// No Menu
								hInstance,							// Instance
								NULL)))								// Dont Pass Anything To WM_CREATE
	{
		KillGLWindow();								// Reset The Display
		MessageBox(NULL,"Window Creation Error.","ERROR",MB_OK|MB_ICONEXCLAMATION);
		return FALSE;								// Return FALSE
	}

	static	PIXELFORMATDESCRIPTOR pfd=				// pfd Tells Windows How We Want Things To Be
	{
		sizeof(PIXELFORMATDESCRIPTOR),				// Size Of This Pixel Format Descriptor
		1,											// Version Number
		PFD_DRAW_TO_WINDOW |						// Format Must Support Window
		PFD_SUPPORT_OPENGL |						// Format Must Support OpenGL
		PFD_DOUBLEBUFFER,							// Must Support Double Buffering
		PFD_TYPE_RGBA,								// Request An RGBA Format
		bits,										// Select Our Color Depth
		0, 0, 0, 0, 0, 0,							// Color Bits Ignored
		0,											// No Alpha Buffer
		0,											// Shift Bit Ignored
		0,											// No Accumulation Buffer
		0, 0, 0, 0,									// Accumulation Bits Ignored
		16,											// 16Bit Z-Buffer (Depth Buffer)  
		0,											// No Stencil Buffer
		0,											// No Auxiliary Buffer
		PFD_MAIN_PLANE,								// Main Drawing Layer
		0,											// Reserved
		0, 0, 0										// Layer Masks Ignored
	};
	
	if (!(hDC=GetDC(hWnd)))							// Did We Get A Device Context?
	{
		KillGLWindow();								// Reset The Display
		MessageBox(NULL,"Can't Create A GL Device Context.","ERROR",MB_OK|MB_ICONEXCLAMATION);
		return FALSE;								// Return FALSE
	}

	if (!(PixelFormat=ChoosePixelFormat(hDC,&pfd)))	// Did Windows Find A Matching Pixel Format?
	{
		KillGLWindow();								// Reset The Display
		MessageBox(NULL,"Can't Find A Suitable PixelFormat.","ERROR",MB_OK|MB_ICONEXCLAMATION);
		return FALSE;								// Return FALSE
	}

	if(!SetPixelFormat(hDC,PixelFormat,&pfd))		// Are We Able To Set The Pixel Format?
	{
		KillGLWindow();								// Reset The Display
		MessageBox(NULL,"Can't Set The PixelFormat.","ERROR",MB_OK|MB_ICONEXCLAMATION);
		return FALSE;								// Return FALSE
	}

	if (!(hRC=wglCreateContext(hDC)))				// Are We Able To Get A Rendering Context?
	{
		KillGLWindow();								// Reset The Display
		MessageBox(NULL,"Can't Create A GL Rendering Context.","ERROR",MB_OK|MB_ICONEXCLAMATION);
		return FALSE;								// Return FALSE
	}

	if(!wglMakeCurrent(hDC,hRC))					// Try To Activate The Rendering Context
	{
		KillGLWindow();								// Reset The Display
		MessageBox(NULL,"Can't Activate The GL Rendering Context.","ERROR",MB_OK|MB_ICONEXCLAMATION);
		return FALSE;								// Return FALSE
	}

	ShowWindow(hWnd,SW_SHOW);						// Show The Window
	SetForegroundWindow(hWnd);						// Slightly Higher Priority
	SetFocus(hWnd);									// Sets Keyboard Focus To The Window
	ReSizeGLScene(width, height);					// Set Up Our Perspective GL Screen

	if (!InitGL())									// Initialize Our Newly Created GL Window
	{
		KillGLWindow();								// Reset The Display
		MessageBox(NULL,"Initialization Failed.","ERROR",MB_OK|MB_ICONEXCLAMATION);
		return FALSE;								// Return FALSE
	}

	return TRUE;									// Success
}

LRESULT CALLBACK WndProc(	HWND	hWnd,			// Handle For This Window
							UINT	uMsg,			// Message For This Window
							WPARAM	wParam,			// Additional Message Information
							LPARAM	lParam)			// Additional Message Information
{
	switch (uMsg)									// Check For Windows Messages
	{
		case WM_ACTIVATE:							// Watch For Window Activate Message
		{
			if (!HIWORD(wParam))					// Check Minimization State
			{
				active=TRUE;						// Program Is Active
			}
			else
			{
				active=FALSE;						// Program Is No Longer Active
			}

			return 0;								// Return To The Message Loop
		}

		case WM_SYSCOMMAND:							// Intercept System Commands
		{
			switch (wParam)							// Check System Calls
			{
				case SC_SCREENSAVE:					// Screensaver Trying To Start?
				case SC_MONITORPOWER:				// Monitor Trying To Enter Powersave?
				return 0;							// Prevent From Happening
			}
			break;									// Exit
		}

		case WM_CLOSE:								// Did We Receive A Close Message?
		{
			PostQuitMessage(0);						// Send A Quit Message
			return 0;								// Jump Back
		}

		case WM_SIZE:								// Resize The OpenGL Window
		{
			ReSizeGLScene(LOWORD(lParam),HIWORD(lParam));  // LoWord=Width, HiWord=Height
			return 0;								// Jump Back
		}
	}

	// Pass All Unhandled Messages To DefWindowProc
	return DefWindowProc(hWnd,uMsg,wParam,lParam);
}

int WINAPI WinMain(	HINSTANCE	hInstance,			// Instance
					HINSTANCE	hPrevInstance,		// Previous Instance
					LPSTR		lpCmdLine,			// Command Line Parameters
					int			nCmdShow)			// Window Show State
{
	MSG		msg;									// Windows Message Structure
	BOOL	done=FALSE;								// Bool Variable To Exit Loop

	// Create Our OpenGL Window
	if (!CreateGLWindow("Materials", 640, 480, 16, false))
	{
		// Quit If Window Was Not Created
		return 0;									
	}

	// main loop
	while (!done)									
	{
		// Is There A Message Waiting?
		if (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))	
		{
			// Have We Received A Quit Message?
			if (msg.message==WM_QUIT)				
			{
				// If So done=TRUE
				done=TRUE;							
			}
			else
			{
				// Translate and Dispatch the message
				TranslateMessage(&msg);
				DispatchMessage(&msg);
			}
		}
		else
		{
			// Draw The Scene.
			if ((active && !DrawGLScene()))
			{
				// Quit signaled
				done = TRUE;
			}
			else
			{
				// Swap Buffers (Double Buffering)
				SwapBuffers(hDC);					
			}
		}
	}

	// Shutdown
	KillGLWindow();									// Kill The Window
	return (msg.wParam);							// Exit The Program
}

#ifndef MATERIAL_H
#define MATERIAL_H

#include <stdio.h>
#include <fstream>
#include <ios>
#include <iostream>
#include <string>

//#include "Engine.h"
#include <windows.h>		// Header File For Windows
#include <stdio.h>			// Header File For Standard Input/Output
#include <gl\gl.h>			// Header File For The OpenGL32 Library
#include <gl\glu.h>			// Header File For The GLu32 Library
#include <gl\glaux.h>		// Header File For The Glaux Library

using namespace std;


class Material
{
public:
	Material();
	Material(const char *name);
	Material(const Material &mat);

	virtual ~Material();

	void loadDiffuseTexture();

	/** apply the material */
	void apply() const;

	std::string name;		//< material name

	int illum;				//< don't know :| Seems to always be 4
	float transparency[3];	//< transparency
	float intensity;		//< intensity
	float specularPower;	//< specular power
	float bumpDepth;		//< bump map depth. Only used if bump is relevent.

	mutable float ambientColor[4];	//< ambient
	mutable float diffuseColor[4];	//< diffuse
	mutable float specularColor[4];	//< specular

	std::string ambientTextureName;		//< ambient texture map name
	std::string diffuseTextureName;		//< diffuse texture map name
	std::string specularTextureName;	//< specular texture map name
	std::string bumpTextureName;		//< bump texture map name

	// OpenGL texture IDs
	unsigned int ambientTextureId;		//< ambient texture object ID
	unsigned int diffuseTextureId;		//< diffuse texture object ID
	unsigned int specularTextureId;		//< specular texture object ID
	unsigned int bumpTextureId;			//< bump map texture object ID

	
private:
};

#endif

#include "Material.h"

#include "TextureManager.h"
#include "Globals.h"

//#include "lesson6.h"

/**
 * Material constructor
 */
Material::Material() : name(), illum(4), intensity(1), specularPower(10), bumpDepth(1),
		ambientTextureName(), diffuseTextureName(), specularTextureName(), bumpTextureName() {

	ambientColor[0] = ambientColor[1] = ambientColor[2] = 
	diffuseColor[0] = diffuseColor[1] = diffuseColor[2] = 
	specularColor[0] = specularColor[1] = specularColor[2] = 0;
	ambientColor[3] = diffuseColor[3] = specularColor[3] = 1;
	transparency[0] = transparency[1] = transparency[2] = 1;
	ambientTextureId = diffuseTextureId = specularTextureId = bumpTextureId = 0;
}

/**
 * Material Copy Constructor
 */
Material::Material(const Material& mat) {
	ambientColor[0] = mat.ambientColor[0]; 
	ambientColor[1] = mat.ambientColor[1]; 
	ambientColor[2] = mat.ambientColor[2]; 
	ambientColor[3] = mat.ambientColor[3];

	diffuseColor[0] = mat.diffuseColor[0]; 
	diffuseColor[1] = mat.diffuseColor[1]; 
	diffuseColor[2] = mat.diffuseColor[2]; 
	diffuseColor[3] = mat.diffuseColor[3];

	specularColor[0] = mat.specularColor[0];
	specularColor[1] = mat.specularColor[1];
	specularColor[2] = mat.specularColor[2];
	specularColor[3] = mat.specularColor[3];

	transparency[0] = mat.transparency[0];
	transparency[1] = mat.transparency[1];
	transparency[2] = mat.transparency[2];

	intensity = mat.intensity;
	specularPower = mat.specularPower;
	name = mat.name;
	ambientTextureName = mat.ambientTextureName;
	diffuseTextureName = mat.diffuseTextureName;
	specularTextureName = mat.specularTextureName;
	bumpTextureName = mat.bumpTextureName;
	illum = mat.illum;
	bumpDepth = mat.bumpDepth;

	ambientTextureId = mat.ambientTextureId;
	diffuseTextureId = mat.diffuseTextureId;
	specularTextureId = mat.specularTextureId;
	bumpTextureId = mat.bumpTextureId;
}

/** 
 * The material class destructor.
 */
Material::~Material() {
	if (ambientTextureId) glDeleteTextures(1, &ambientTextureId);
	if (diffuseTextureId) glDeleteTextures(1, &diffuseTextureId);
	if (specularTextureId) glDeleteTextures(1, &specularTextureId);
	if (bumpTextureId) glDeleteTextures(1, &bumpTextureId);
}

/**
 *
 */
void Material::apply() const {

	// HACK !?!??
	glColor3f(1.0f, 1.0f, 1.0f);

	float average_transp = (transparency[0]+transparency[1]+transparency[2])/3.0f;
	ambientColor[3] = diffuseColor[3] = specularColor[3] = average_transp;
	glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, ambientColor);
	glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, diffuseColor);
	glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, specularColor);
	glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, specularPower);

	if (diffuseTextureId) {
		// maya always sets the diffuse color to black when a texture is applied.
		float color[4] = {0.8f, 0.8f, 0.8f, average_transp};
		glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, color);

		// apply texture
		glBindTexture(GL_TEXTURE_2D, diffuseTextureId);

		// Enable texturing
		glEnable(GL_TEXTURE_2D);
	} else {
		glDisable(GL_TEXTURE_2D);
	}
}

/**
 * Loads a bitmap and converts it to a texture.
 * @return The new texture's ID.
 */
void Material::loadDiffuseTexture() {
	diffuseTextureId = loadBitmap(diffuseTextureName.c_str());
}