stars.cpp

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// Stars.cpp: implementation of the CStars class.
//
//////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "MyGame.h"
#include "Stars.h"

#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif
#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif
//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

CStars::~CStars()
{

}
CStars::CStars(int starn)
{
	cc=0;
	S.resize(starn);
	C.resize(starn+10);
	for(int i=0;i<starn;++i)
	{
		S[i].v[0]=(drand48()-.5);
		S[i].v[1]=(drand48()-.5);
		S[i].v[2]=0;
	}
	float basecolor;
	for(i=0;i<starn+10;++i)
	{
		if(i%10) basecolor=drand48();
		C[i].v[0]=C[i].v[1]=C[i].v[2]=basecolor+sin((i%10)*M_PI/10.0);
	}
}

int CStars::Draw()
{
	glDisable(GL_LIGHTING);
	glColor3f(1.0,1.0,1.0);
	glEnableClientState (GL_VERTEX_ARRAY);
	glEnableClientState (GL_COLOR_ARRAY);
	glVertexPointer(3,GL_FLOAT,0,S.begin());
	glColorPointer(3,GL_FLOAT,0,&(C[cc]));
	glDrawArrays(GL_POINTS,0,S.size());
	glDisableClientState (GL_VERTEX_ARRAY);
	glDisableClientState (GL_COLOR_ARRAY);
	glEnable(GL_LIGHTING);
	return S.size();
};