skybox.cpp

《OpenGL游戏编程》这本书的配套源码。

//========================================================
/**
*  @file      SkyBox.cpp
*
*  项目描述： 构造游戏引擎
*  文件描述:  天空类
*  适用平台： Windows98/2000/NT/XP
*  
*  作者：     WWBOSS
*  电子邮件:  [e-mail]
*  创建日期： 2007-07-26	
*  修改日期： 2007-07-26
*
*/ 
//========================================================

#include "stdafx.h"
#include "SkyBox.h"
#include <math.h>


CSkyBox::CSkyBox():yrot(0.f)
{
}

CSkyBox::~CSkyBox()
{
}


/**\brief
 * 天空的初始化
 */
BOOL CSkyBox::Init()
{
	if(!texture.InitTexture("scene/cloud.bmp"))
		return FALSE;
	return TRUE;
}


/**\brief
 * 渲染天空
 */
void CSkyBox::Render()
{
	CCamera::GetCameraPointer()->GetCameraPos(&m_sCameraPos);
	texture.Bind(0);
	glDisable(GL_DEPTH_TEST);
	glEnable(GL_TEXTURE_2D);
	glPushMatrix();
	glTranslatef(m_sCameraPos.x,-40,m_sCameraPos.z-CCamera::GetCameraPointer()->GetDestToRole());
	glRotatef(yrot,0.f,1.f,0.f);
	glColor3f(1.f,1.f,1.f);
	glBegin(GL_TRIANGLE_FAN);
		glTexCoord2f(0.5,0.5);
		glVertex3f(0,300,0);
		glTexCoord2f(0,0);
		glVertex3f(-300,0, 300);

		glTexCoord2f(1,0);
		glVertex3f(-300,0,-300);

		glTexCoord2f(1,1);
		glVertex3f( 300,0,-300);

		glTexCoord2f(0,1);
		glVertex3f( 300,0, 300);

		glTexCoord2f(0,0);
		glVertex3f(-300,0, 300);
	glEnd();
	glPopMatrix();
	glDisable(GL_TEXTURE_2D);
	glEnable(GL_DEPTH_TEST);

	yrot += 0.04f;
	if(yrot > 360.0f)yrot -= 360.0f;
}