www.pudn.com > etree_src.zip > Enviroment.cpp

//**************************************************************************** 
//  Enviroment.cpp: implementation of the CEnviroment class. 
// 
//  Copyright (c) Boris J. Wang (e_boris2002@hotmail.com) 2002 - 2003 
//  From Institute of Computing Technology, Chinese Academy of Sciences 
//                                                Beijing 100871, China 
// 
//  THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF  
//  ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO  
//  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A  
//  PARTICULAR PURPOSE. 
//**************************************************************************** 
 
#include "stdafx.h" 
#include "opengl.h" 
#include "Enviroment.h" 
#include "math.h" 
 
#ifdef _DEBUG 
#undef THIS_FILE 
static char THIS_FILE[]=__FILE__; 
#define new DEBUG_NEW 
#endif 
 
////////////////////////////////////////////////////////////////////// 
// Construction/Destruction 
////////////////////////////////////////////////////////////////////// 
GLfloat CEnviroment::EnvFogFar = 1000; 
GLfloat CEnviroment::EnvFogNear = 300; 
 
CEnviroment::CEnviroment(LPCTSTR SkyTexture,LPCTSTR GroundTexture,GLfloat iSkyR,GLfloat iSkyG,GLfloat iSkyB) 
:Sky(SkyTexture,GL_Tex_BMP,0), 
 Ground(GroundTexture,GL_Tex_BMP,9) 
{ 
	SkyDetail = 20; 
	SkyR = iSkyR; 
	SkyG = iSkyG; 
	SkyB = iSkyB; 
} 
 
CEnviroment::CEnviroment() 
:Sky(_T("sky.bmp"),GL_Tex_BMP,0), 
 Ground(_T("ground.bmp"),GL_Tex_BMP,8) 
{ 
	SkyDetail = 20; 
	SkyR = 24.0/256.0;//0.09375;	 
	SkyG = 60.0/256.0;//0.234375; 
	SkyB = 107.0/256.0;//0.390625; 
} 
 
CEnviroment::~CEnviroment() 
{ 
} 
 
void CEnviroment::RenderAllWithFog() 
{ 
	glEnable(GL_FOG); 
	{ 
		GLfloat fogColor[4] = {0.1953125,0.3515625,0.546875, 1.0};  //color of top sky 
 
		glFogi (GL_FOG_MODE, GL_LINEAR); 
		glFogfv (GL_FOG_COLOR, fogColor); 
		glFogf (GL_FOG_DENSITY, 1); 
		glFogf (GL_FOG_START, EnvFogNear); 
		glFogf (GL_FOG_END, EnvFogFar); 
		glHint (GL_FOG_HINT, GL_DONT_CARE  ); 
	} 
 
	RenderSky(); 
	RenderGround(); 
 
	glDisable(GL_FOG); 
} 
 
void CEnviroment::SetSkyDetail(int d) 
{ 
	ASSERT(d>4); 
	SkyDetail = d; 
} 
 
 
void CEnviroment::RenderSky() 
{ 
	glDisable(GL_LIGHTING); 
	glPushMatrix(); 
		glTranslatef(0,1,0); 
		glScalef(80,120,80); 
		double angle = 0.0,inc_angle = 360.0/SkyDetail; 
		double tex = 0.0f,inc_tex = 3.0/SkyDetail; 
 
		glColor3f(1,1,1); 
 
		Sky.Apply(); 
 
		int i = 0; 
		glBegin(GL_QUAD_STRIP); 
		{ 
			for(;i