opengl入门的配套程序

最新推荐文章于 2024-10-28 20:12:03 发布

原创最新推荐文章于 2024-10-28 20:12:03 发布 · 792 阅读

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版权归原作者所有，感谢原作者的无私奉献。

这是本人自己敲出的代码，所以写上了原创标题。但代码的内容并非本人原创。再次感谢这位作者的奉献。

代码如何使用：在main函数中修改glutDisplayFunc函数参数就可以调用函数。有时候可能不能显示，这是正常的，那就修改main函数中的“glutInitDisplayMode”函数的参数。如果仍然不能使用那就把main函数中glutIdleFunc(&myIdle2);函数注释掉，应该就可以使用了。

在代码不修改的情况下实现的效果如下图：在dos窗口中不停的按‘enter“键就可以看见三棱锥不停的旋转。，如果不按enter键，呵呵，会出现点问题。

#include<gl/glut.h>
#include<iostream>
using namespace std;
#include<math.h>
const int n=200;
const GLfloat R =0.5f;
const GLfloat PI = 3.1415926;
void myDisplay(void )
{
	int i;
	glClear(GL_COLOR_BUFFER_BIT);
	glPointSize(0.5f);
	glBegin(GL_POLYGON);
		for(i=0;i<n;i++)
		{
			glVertex2f(R*cos(2*PI/n*i),R*sin(2*PI/n*i) );
		}
	glEnd();
	//glRectf(-0.5f,-0.5f,0.5f,0.5f);
	//glBegin(GL_POINTS);
	//glBegin(GL_LINES);
		//glVertex2f(0.0f,0.0f);
		//glVertex2f(0.5f,0.5f);
	//glEnd();
	glFlush();
	
}
const GLfloat factor = 1.0f;
void myDisplay2()
{
	GLfloat x;
	glClear(GL_COLOR_BUFFER_BIT);
	glPointSize(5.0f);
	glBegin(GL_LINES);
		glVertex2f(-1.0f,0.0f);
		glVertex2f(1.0f,0.0f);
		glVertex2f(0.0f,-1.0f);
		glVertex2f(0.0f,1.0f);
	glEnd();
	glFlush();
	glBegin(GL_LINE_STRIP);
		for(x = -1.0f/factor;x<1.0f/factor; x+= 0.01f);
		{
			glVertex2f(x*factor,sin(x)*factor);
		}
	glEnd();
	glFlush();
}
void myDisplay3()
{
	glClear(GL_COLOR_BUFFER_BIT);
	glPointSize(5.0f);
	glBegin(GL_POINTS);
		glVertex2f(0.0f,0.0f);
		glVertex2f(0.5f,0.5f);
	glEnd();
	glFlush();
}
void myDisplay4()
{
	glClear(GL_COLOR_BUFFER_BIT);
	glEnable(GL_LINE_STIPPLE);
	glLineStipple(2,0xf0f);
	glLineWidth(10.0f);
	glBegin(GL_LINES);
		glVertex2f(0.0f,0.0f);
		glVertex2f(0.5f,0.5f);
	glEnd();
	glFlush();
}
void myDisplay5()
{
	glClear(GL_COLOR_BUFFER_BIT);
	glPolygonMode(GL_FRONT,GL_FILL);
	glPolygonMode(GL_BACK,GL_LINE);
	glFrontFace(GL_CCW);
	glBegin(GL_POLYGON);
		glVertex2f(-0.5f,-0.5f);
		glVertex2f(0.0f,-0.5f);
		glVertex2f(0.0f,0.0f);
		glVertex2f(-0.5f,0.0f);
	glEnd();
	glFlush();
}
static int i;
void myDisplay6()
{
	glClear(GL_COLOR_BUFFER_BIT);
	//glColor3f(0.0f,1.0f,1.0f);
	glIndexi(2);
	glRectf(-0.5f,-0.5f,0.5f,0.5f);
	glFlush();
}
void myDisplay7()
{
	glClearColor(1.0f,0.0f,0.0f,0.0f);
	glClear(GL_COLOR_BUFFER_BIT);
	glFlush();
	cout<<i++<<endl;
	
}
const GLdouble pi = 3.14;
void myDisplay8()
{
	//glShadeModel(GL_FLAT);
	glShadeModel(GL_SMOOTH);
	glClear(GL_COLOR_BUFFER_BIT);
	glBegin(GL_TRIANGLE_FAN);
	glColor3f(1.0f,1.0f,1.0f);
	glVertex2f(0.0f,0.0f);
	for(int i=0;i<=8;++i)
	{
		glColor3f(i&0x04,i&0x02,i&0x01);
		glVertex2f(cos(i*pi/4),sin(i*pi/4) );
	}
	glEnd();
	glFlush();
}
int day = 200;
void myDisplay9()
{
	glEnable(GL_DEPTH_TEST);
	glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
	
	glMatrixMode(GL_PROJECTION);
	glLoadIdentity();
	gluPerspective(75,1,1,400000000);
	glMatrixMode(GL_MODELVIEW);
	glLoadIdentity();
	gluLookAt(0,-200000000,200000000,0,0,0,0,0,1);
	glColor3f(1.0f,0.0f,0.0f);
	glutSolidSphere(69600000,20,20);
	
	glColor3f(0.0f,0.0f,1.0f);
	glRotatef(day/360.0*360,0.0f,0.0f,-1.0f);
	glTranslatef(150000000,0.0f,0.0f);
	glutSolidSphere(15000000,20,20);
	
	glColor3f(1.0f,1.0f,0.0f);
	glRotatef(day/30.0*360 -day/360.0*350.0,0.0f,0.0f,-1.0f);
	glTranslatef(380000000,0.0f,0.0f);
	glutSolidSphere(4345000,20,20);
	//day++;
	glFlush();
	glutSwapBuffers();
}
void myIdle(void)
{
	++day;
	if(day>=360)
		day = 0;
	myDisplay();
}

const int width = 400;
const int height = 400;
static GLfloat angle = 0.0f;
void myDisplay10(void )
{
	glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
	//
	glMatrixMode(GL_PROJECTION);
	glLoadIdentity();
	gluPerspective(90.0f,1.0f,1.0f,20.0f);
	glMatrixMode(GL_MODELVIEW);
	gluLookAt(0.0, 5.0, -10.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0); ;
	
	GLfloat sunLightPositon[] = {0.0f,0.0f,0.0f,1.0f};
	GLfloat sunLightAmbient[] = {0.0f,0.0f,0.0f,1.0f};
	GLfloat sunLightDiffuse[] = {1.0f,1.0f,1.0f,1.0f};
	GLfloat sunLightSpecular[] = { 1.0f,1.0f,1.0f,1.0f};
	glLightfv(GL_LIGHT0,GL_POSITION,sunLightPositon);
	glLightfv(GL_LIGHT0,GL_AMBIENT,sunLightAmbient);
	glLightfv(GL_LIGHT0,GL_DIFFUSE ,sunLightDiffuse);
	glLightfv(GL_LIGHT0,GL_SPECULAR ,sunLightSpecular);
	
	glEnable(GL_LIGHT0);
	glEnable(GL_LIGHTING);
	glEnable(GL_DEPTH_TEST);
	
	//定义太阳的材质
	{
		GLfloat sunMatAmbient[] = {0.0f,0.0f,0.0f,1.0f};
		GLfloat sunMatDiffuse[] = {0.0f,0.0f,0.0f,1.0f};
		GLfloat sunMatSpecular[] = { 0.0f,0.0f,0.0f,1.0f};
		GLfloat sunMatEmission[] = {0.5f,0.0f,0.0f,1.0f};
		GLfloat sunMatShininess = 0.0f;
		
		glMaterialfv(GL_FRONT,GL_AMBIENT,sunMatAmbient);
		glMaterialfv(GL_FRONT,GL_DIFFUSE,sunMatDiffuse);
		glMaterialfv(GL_FRONT,GL_SPECULAR,sunMatSpecular);
		glMaterialfv(GL_FRONT,GL_EMISSION,sunMatEmission);
		glMaterialf(GL_FRONT,GL_SHININESS,sunMatShininess);
		
		glutSolidSphere(2.0,40,32);
		
	}
	//定义地球的材质，并绘制地球
	{
		GLfloat earthMatAmbient[] = { 0.0f,0.0f,0.5f,1.0f};
		GLfloat earthMatDiffuse[] = { 0.0f,0.0f,0.5f,1.0f};
		GLfloat earthMatSpecular[] = {0.0f,0.0f,1.0f,1.0f};
		GLfloat earthMatEmission[] = {0.0f,0.0f,0.0f,1.0f};
		GLfloat earthMatShiniess = 30.f;
		
		glMaterialfv(GL_FRONT,GL_AMBIENT,earthMatAmbient);
		glMaterialfv(GL_FRONT,GL_DIFFUSE,earthMatDiffuse);
		glMaterialfv(GL_FRONT,GL_SPECULAR,earthMatSpecular);
		glMaterialfv(GL_FRONT,GL_EMISSION,earthMatEmission);
		glMaterialf(GL_FRONT,GL_SHININESS,earthMatShiniess);
		
		glRotatef(angle,0.0f,-1.0f,0.0f);
		glTranslatef(5.0f,0.0f,0.0f);
		glutSolidSphere(2.0,40,32);
		
	}
	glutSwapBuffers();
	glFlush();
}
	
	
void myDisplay11()
{
	glClearColor(1.0f,0.0f,0.0f,0.0f);
	glClear(GL_COLOR_BUFFER_BIT);
	const int segments = 100;
	const GLfloat pi = 3.14;
	glLineWidth(10.0);
	glBegin(GL_LINE_LOOP);
	for(int i=0;i<segments;i++)
	{
		GLfloat tmp = 2*pi*i/segments;
		glVertex2f(cos(tmp),sin(tmp) );
		//glVertex2f(3,4);
	}
	glEnd();
	glFlush();
}	

void myDisplay12()
{
	glClear(GL_COLOR_BUFFER_BIT);
	glEnable(GL_LINE_STIPPLE);
	glLineStipple(2,0xf0f);
	glLineWidth(10.0f);
	glBegin(GL_LINES);
		glVertex2f(0.0f,0.0f);
		glVertex2f(0.5f,0.5f);
	glEnd();
	glFlush();
}

#define ColoredVertex(c,v) do{glColor3fv(c);glVertex3fv(v);} while(0)

//GLfloat angle = 0.0f;

void myDisplay13(void )
{
	static int list  = 0;
	if(list == 0)
	{
		GLfloat PointA[] = {0.5f,-sqrt(6.0f)/12,-sqrt(3.0f)/6};
		GLfloat PointB[] = { -0.5f,-sqrt(6.0f)/12,-sqrt(3.0f)/6};
		GLfloat PointC[] = { 0.0f,-sqrt(6.0f)/12,sqrt(3.0f)/3};
		GLfloat PointD[] = { 0.0f,sqrt(6.0f)/4,0};
		
		GLfloat ColorR[] = {1,0,0};
		GLfloat ColorG[] = {0,1,0};
		GLfloat ColorB[] = {0,0,1};
		GLfloat ColorY[] = {1,1,0};
		
		list = glGenLists(1);
		glNewList(list,GL_COMPILE);
		
		glBegin(GL_TRIANGLES);
			//平面ABC 
			ColoredVertex(ColorR,PointA);
			ColoredVertex(ColorG,PointB);
			ColoredVertex(ColorB,PointC);
			//ACD
			ColoredVertex(ColorR,PointA);
			ColoredVertex(ColorB,PointC);
			ColoredVertex(ColorY,PointD);
			//CBD
			ColoredVertex(ColorB,PointC);
			ColoredVertex(ColorG,PointB);
			ColoredVertex(ColorY,PointD);
			//BAD
			ColoredVertex(ColorG,PointB);
			ColoredVertex(ColorR,PointA);
			ColoredVertex(ColorY,PointD);
		glEnd();
		
		glEndList();
		
		
		glEnable(GL_DEPTH_TEST);
		
	}//if
	
	
	glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
	glPushMatrix();
	glRotatef(angle,1,0.5,0);
	glCallList(list);
	glPopMatrix();
	glutSwapBuffers();
}





void myIdle2(void)
{
	++angle;
	if(angle>=360)
		angle = 0;
	myDisplay13();
	//cout<<"fuck"<<endl;
	int a;
	//in>>a;
	getchar();
}










int main( int argc ,char *argv[])
{
	glutInit(&argc,argv);
	//glutInitDisplayMode(GLUT_RGB|GLUT_SINGLE);
	glutInitDisplayMode(GLUT_RGB|GLUT_DOUBLE);
	glutInitWindowPosition(100,100);
	glutCreateWindow("jiazengshen ");
	glutDisplayFunc(&myDisplay13);
	glutIdleFunc(&myIdle2);
	glutMainLoop();
	return 0;
}