#include?“GL/glut.h“
#include?“GL/glu.h“
#include?“GL/gl.h“
#include?“string.h“
#include?“sstream“
#include?“assert.h“
#include?“iostream.h“

static?const?int?QUIT_VALUE（99）;
GLuint?listID;
void?Bresenham（int?x0int?y0int?x1int?y1）?
{
	x0=x0*100;
	y0=y0*100;
	x1=x1*100;
	y1=y1*100;
	float?dxdyadd1add2p0xym;
	int?k;
	dx=x1-x0;
	dy=y1-y0;
	m=dy/dx;
	if（m>1）
	{
		p0=2*dx-dy;
		add1=2*（dx-dy）;
		add2=2*dx;
	}
	else?if（m>=0）
	{
		p0=2*dy-dx;
		add1=2*（dy-dx）;
		add2=2*dy;
	}
	else?if（m>-1）
	{
		p0=2*dy+dx;
		add1=2*（dy+dx）;
		add2=2*dy;
	}
	else
	{
		p0=2*dx+dy;
		add1=2*（dx+dy）;
		add2=2*dx;
	}
	
	x=x0y=y0;
	glColor3f（110）;
	glBegin（GL_POINTS）;
	cout<<“直線的Bresenham算法:“<	glVertex2f（x/1000y/1000）;
	if（m>1）
		for（k=0;k		{??
			if（p0>0）
			{
				p0+=add1;
				x++;
				y++;
			}
			else
			{
				p0+=add2;
				y++;
			}
			glVertex2f（x/1000y/1000）;
			
		}
		else?if（m>0）
			for（k=0;k			{
				if（p0>0）
				{
					p0+=add1;
					x++;
					y++;
				}
				else
				{
					p0+=add2;
					x++;
				}
				
				glVertex2f（x/1000y/1000）;
			}
			else?if（m>-1）
				for（k=0;k				{
					if（p0>0）
					{
						p0+=add2;
						x++;
						y--;
					}
					else
					{
						p0+=add1;
						x++;
					}
					glVertex2f（x/1000y/1000）;
				}
				else
				{
					for（k=0;k					{??
						if（p0>0）
						{
							p0+=add1;
							x++;
							y--;
						}
						else
						{
							p0+=add2;
							y--;
						}
						glVertex2f（x/1000y/1000）;
					}
				}
				glEnd（）;	
}

static?void?display（）
{
				glClear（GL_COLOR_BUFFER_BIT）;
				
				glLoadIdentity（）;
				glTranslatef（0.f0.f-4.f）;
				glCallList（listID）;
				glutSwapBuffers（）;
				assert（glGetError（）==GL_NO_ERROR）;
}

static?void?reshape（int?wint?h）?
{
				glViewport（00wh）;
				glMatrixMode（GL_PROJECTION）;
				glLoadIdentity（）;
				gluPerspective（50.（double）w/（double）h1.10.）;
				glMatrixMode（GL_MODELVIEW）;
				assert（glGetError（）==GL_NO_ERROR）;
}

static?void?mainMenuCB（int?value）?
{
				if（value==QUIT_VALUE）
					exit（0）;
}

static?void?init（）
{
	glDisable（GL_DITHER）;
	std::string?ver（（const?char*）?glGetString（GL_VERSION））;
	assert（!ver.empty（））;
	std::istringstream?verStream（ver）;
				
	int?majorminor;
	char?dummySep;
	verStream>>major>>dummySep>>minor;
	const?bool?useVertexArrays=（（major>=1）&&（minor>=1））;
				
	const?GLfloat?data[]={-1.f-1.f0.f1.f-1.f0.f0.f1.f0.f?};
	
	if（useVertexArrays）?
	{
		glEnableClientState（GL_VERTEX_ARRAY）;
		glVertexPointer（3GL_FLOAT0data）;
	}	
	listID=glGenLists（1）;
	glNewList（listIDGL_COMPILE）;
	
	glBegin（GL_LINES）;
	glColor3f（111）;
	glVertex3f（0.0f?0.0f?0.0f）;
	glVertex3f（-3.0?0.0f?0.0f）;
	glVertex3f（0.0f?0.0f?0.0f）;
	glVertex3f（3.0?0.0f?0.0f）;
	glVertex3f（0.0f?0.0f?0.0f）;
	glVertex3f（0.0?2.0f?0.0f）;
	glVertex3f

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2013-11-01?23:52??圖形學實驗\
?????文件????????3689??2013-10-30?15:32??圖形學實驗\Bresenham直線.cpp
?????文件????????3487??2013-10-30?22:33??圖形學實驗\Bresenham直線.dsp
?????文件?????????534??2013-10-30?23:19??圖形學實驗\Bresenham直線.dsw
?????文件???????41984??2013-10-30?23:19??圖形學實驗\Bresenham直線.ncb
?????文件???????48640??2013-10-30?23:19??圖形學實驗\Bresenham直線.opt
?????文件?????????260??2013-10-30?23:05??圖形學實驗\Bresenham直線.plg
?????文件????????2717??2013-10-29?22:29??圖形學實驗\DDA直線.cpp
?????文件????????3415??2013-10-29?22:27??圖形學實驗\DDA直線.dsp
?????文件?????????522??2013-10-29?22:29??圖形學實驗\DDA直線.dsw
?????文件???????41984??2013-10-29?22:29??圖形學實驗\DDA直線.ncb
?????文件???????48640??2013-10-29?22:29??圖形學實驗\DDA直線.opt
?????文件????????1167??2013-10-29?22:29??圖形學實驗\DDA直線.plg
?????目錄???????????0??2013-11-01?23:52??圖形學實驗\Debug\
?????文件??????528478??2013-10-30?15:32??圖形學實驗\Debug\Bresenham直線.exe
?????文件??????772320??2013-10-30?15:32??圖形學實驗\Debug\Bresenham直線.ilk
?????文件??????246646??2013-10-30?15:32??圖形學實驗\Debug\Bresenham直線.obj
?????文件?????2329492??2013-10-30?15:13??圖形學實驗\Debug\Bresenham直線.pch
?????文件?????1065984??2013-10-30?15:32??圖形學實驗\Debug\Bresenham直線.pdb
?????文件??????524376??2013-10-29?22:29??圖形學實驗\Debug\DDA直線.exe
?????文件??????771908??2013-10-29?22:29??圖形學實驗\Debug\DDA直線.ilk
?????文件??????253238??2013-10-29?22:29??圖形學實驗\Debug\DDA直線.obj
?????文件?????5655688??2013-10-14?17:34??圖形學實驗\Debug\DDA直線.pch
?????文件?????1065984??2013-10-29?22:29??圖形學實驗\Debug\DDA直線.pdb
?????文件??????516191??2013-10-14?17:27??圖形學實驗\Debug\EllipsePoints.exe
?????文件??????746684??2013-10-14?17:27??圖形學實驗\Debug\EllipsePoints.ilk
?????文件??????251129??2013-10-14?17:27??圖形學實驗\Debug\EllipsePoints.obj
?????文件?????2345880??2013-10-12?13:01??圖形學實驗\Debug\EllipsePoints.pch
?????文件?????1025024??2013-10-14?17:27??圖形學實驗\Debug\EllipsePoints.pdb
?????文件??????508000??2013-10-14?17:18??圖形學實驗\Debug\MIdPointCircle.exe
?????文件??????733628??2013-10-14?17:18??圖形學實驗\Debug\MIdPointCircle.ilk
............此處省略56個文件信息