lesson46.cpp

关于OpenGL的实例教程源代码

/**************************************
*                                     *
*   Jeff Molofee's Basecode Example   *
*          nehe.gamedev.net           *
*                2001                 *
*                                     *
*    All Code / Tutorial Commenting   *
*       by Jeff Molofee ( NeHe )      *
*                                     *
**************************************/

#include <windows.h>											// Header File For Windows
#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 "NeHeGL.h"												// Header File For NeHeGL
#include <math.h>												// We'll Need Some Math

// ROACH
#include "arb_multisample.h"
bool domulti = true;
bool doangle = true;
// ENDROACH

#pragma comment( lib, "opengl32.lib" )							// Search For OpenGL32.lib While Linking
#pragma comment( lib, "glu32.lib" )								// Search For GLu32.lib While Linking
#pragma comment( lib, "glaux.lib" )								// Search For GLaux.lib While Linking

#ifndef CDS_FULLSCREEN											// CDS_FULLSCREEN Is Not Defined By Some
#define CDS_FULLSCREEN 4										// Compilers. By Defining It This Way,
#endif															// We Can Avoid Errors

GL_Window*	g_window;
Keys*		g_keys;

float angle= 0.0f;

BOOL Initialize (GL_Window* window, Keys* keys)					// Any GL Init Code & User Initialiazation Goes Here
{
	g_window	= window;
	g_keys		= keys;

	// Start Of User Initialization
	angle		= 0.0f;											// Set Starting Angle To Zero

	glViewport(0 , 0,window->init.width ,window->init.height);	// Set Up A Viewport
	glMatrixMode(GL_PROJECTION);								// Select The Projection Matrix
	glLoadIdentity();											// Reset The Projection Matrix
	gluPerspective(50, (float)window->init.width/(float)window->init.height, 5,  2000); // Set Our Perspective
	glMatrixMode(GL_MODELVIEW);									// Select The Modelview Matrix
	glLoadIdentity();											// Reset The Modelview Matrix

	glEnable(GL_DEPTH_TEST);									// Enable Depth Testing

	glShadeModel(GL_SMOOTH);									// Select Smooth Shading

	glClearColor(0.0f, 0.0f, 0.0f, 0.5);						// Set The Clear Color To Black

	return TRUE;												// Return TRUE (Initialization Successful)
}

void Deinitialize (void)										// Any User DeInitialization Goes Here
{
}

void Update (DWORD milliseconds)								// Perform Motion Updates Here
{
	// ROACH
	if(g_keys->keyDown [VK_SPACE] == TRUE)
		domulti=!domulti;

	if(g_keys->keyDown ['M'] == TRUE)
		doangle=!doangle;
	// ENDROACH

	if (g_keys->keyDown [VK_ESCAPE] == TRUE)					// Is ESC Being Pressed?
	{
		TerminateApplication (g_window);						// Terminate The Program
	}

	if (g_keys->keyDown [VK_F1] == TRUE)						// Is F1 Being Pressed?
	{
		ToggleFullscreen (g_window);							// Toggle Fullscreen Mode
	}
}

void Draw (void)												// Draw The Scene
{
	// ROACH
	if(domulti)
		glEnable(GL_MULTISAMPLE_ARB);							// Enable Our Multisampling
	// ENDROACH

	glClearColor(0.0f, 0.0f, 0.0f, 0.5);						// Set The Clear Color To Black
	glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);		// Clear Screen And Depth Buffer
	glLoadIdentity();											// Reset The View	

	for(float i=-10;i<10;i++)
		for(float j=-10;j<10;j++)
		{
			glPushMatrix();
			glTranslatef(i*2.0f,j*2.0f,-5.0f);
			glRotatef(angle,0.f,0.f,1.f);
				glBegin(GL_QUADS);
				glColor3f(1.0f,0.0f,0.0f);glVertex3f(i,j,0.0f);
				glColor3f(0.0f,1.0f,0.0f);glVertex3f(i + 2.0f,j,0.0f);
				glColor3f(0.0f,0.0f,1.0f);glVertex3f(i + 2.0f,j + 2.0f,0.0f);
				glColor3f(1.0f,1.0f,1.0f);glVertex3f(i,j + 2.0f,0.0f);
				glEnd();
			glPopMatrix();
		}

	if(doangle)
		angle+=0.05f;

	glFlush ();													// Flush The GL Rendering Pipeline

	// ROACH
	if(domulti)
		glDisable(GL_MULTISAMPLE_ARB);
	// ENDROACH
}