www.pudn.com > ÈýάÌì¿ÕÓëµØÐÎ.zip > oglInit.cpp, change:2001-10-15,size:2835b

// SkyDome Demo  -  October 2001 
// 
// Luis R. Sempé 
// visual@spheregames.com 
// Sphere Games (http://www.spheregames.com) 
//  
// You may use, copy, distribute or create derivative software 
// for any purpose. If you do, I'd appreciate it if you write me  
// and let me know what you do with it. Thanks! 
// Have fun! 
//////////////////////////////////////////////////// 
 
#include <stdio.h> 
#include "oglInit.h" 
#include "globals.h" 
#include "SkyDome.h" 
#include "Terrain.h" 
#include "SkyPlane.h" 
 
GLuint texture[2]; 
 
GLvoid ResizeGLWindow(GLsizei width, GLsizei height) 
{ 
	if (height == 0) height = 1; 
 
	// sets the viewport's size 
	glViewport(0,0,width,height); 
 
	// set the projection matrix 
	glMatrixMode(GL_PROJECTION); 
	glLoadIdentity(); 
 
	gluPerspective(45.0f, (GLfloat)(width/height), 0.1f, 2000.0f); 
 
	glMatrixMode(GL_MODELVIEW); 
	glLoadIdentity(); 
 
} 
 
GLint InitGL(GLvoid) 
{ 
 
	glEnable(GL_TEXTURE_2D); 
	glClearColor(0.0f, 0.0f, 0.0f, 0.0f); 
	glClearDepth(1.0f); 
	glEnable(GL_DEPTH_TEST); 
	glDepthFunc(GL_LEQUAL); 
	glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST); 
	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); 
 
	// Fog 
	GLfloat fogColor[4]= {0.9f, 0.9f, 0.9f, 0.6f}; 
	glFogi(GL_FOG_MODE, GL_LINEAR); 
	glFogfv(GL_FOG_COLOR, fogColor); 
	glFogf(GL_FOG_DENSITY, 0.002f); 
	glFogf(GL_FOG_START, 100.0f); 
	glFogf(GL_FOG_END, 800.0f); 
	glHint(GL_FOG_HINT, GL_FASTEST); 
 
	LoadTextures("clouds2.bmp", 0); 
	LoadTextures("sand3.bmp", 1); 
 
	GenerateDome(600.0f, 5.0f, 5.0f, 1.0f, 1.0f); 
	GenerateSkyPlane(16, 500.0f, 900.0f, 1.0f, 1.0f); 
	GenerateTerrain(); 
 
	return true; 
} 
 
int LoadTextures(char *filename, int id) 
{ 
	int status = false; 
 
	AUX_RGBImageRec *TextureImage = NULL; 
 
	ZeroMemory(&TextureImage, sizeof(void*)*1); 
 
	if (TextureImage = LoadBMP(filename)) 
	{ 
		status = true; 
 
		glGenTextures(1, &texture[id]); 
		glBindTexture(GL_TEXTURE_2D, texture[id]); 
 
		glTexImage2D(GL_TEXTURE_2D, 0, 3, TextureImage->sizeX, TextureImage->sizeY, 
			0, GL_RGB, GL_UNSIGNED_BYTE, TextureImage->data); 
 
		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); 
		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); 
	} 
 
	if (TextureImage) 
	{ 
		if (TextureImage->data) 
			free(TextureImage->data); 
		free(TextureImage); 
	} 
 
	return status; 
 
} 
 
AUX_RGBImageRec *LoadBMP(char *filename) 
{ 
	FILE *file = NULL; 
 
	if (!filename) 
		return NULL; 
 
	file = fopen(filename, "r"); 
	if (file) 
	{ 
		fclose(file); 
		return auxDIBImageLoad(filename); 
	} 
	return NULL; 
} 
 
void Move(float px, float py, float pz, float roll, 
		  float pitch, float heading) 
{ 
	glRotatef(roll, 0.0f, 0.0f, 1.0f); 
	glRotatef(pitch, 0.0f, 1.0f, 0.0f); 
	glRotatef(heading, 1.0f, 0.0f, 0.0f); 
	glTranslatef(-px, -py, -pz); 
}