draw this shape using opengl

computer student (3)
hi all,

i want to ask u about the following shape how can we draw it using OpenGL primitives:

http://img103.herosh.com/2011/05/10/36849501.jpg

[img]http://img103.herosh.com/2011/05/10/36849501.jpg[/img]

thank u
writetonsharma (1461)

People here will only help when you post some code.
computer student (3)
This is my code but it has some problems if any one can help me :
_____________________________


#include <windows.h>
#include <GL/glut.h>
#include <math.h>

void drawShapes()
{
glClear(GL_COLOR_BUFFER_BIT);

//**********************

glClearColor(1.0,1.0,1.0,0.0);
glColor3f(0,0,0);
glBegin(GL_QUADS);
glVertex2i(10,10);
glVertex2i(10,490);
glVertex2i(390,490);
glVertex2i(390,10);
glVertex2i(10,10);
gluOrtho2D(0.0, 640.0, 0.0, 480.0);
glEnd();

//the circules
//1st one
GLfloat xi,yi,theta=0;
GLfloat x_c,y_c,r;
int count;

x_c=200,y_c=250,r=160;
glBegin(GL_POLYGON);
for(count=1;count<=10000;count++)
{
theta=theta+0.001;
xi=x_c + r * cos (theta);
yi=y_c + r * sin (theta);
glColor3f(1,0,1);
glVertex2d(xi,yi);
}
glEnd();

//2nd one
x_c=200,y_c=250,r=130;
glBegin(GL_POLYGON);
for(count=1;count<=10000;count++)
{
theta=theta+0.001;
xi=x_c + r * cos (theta);
yi=y_c + r * sin (theta);
glColor3f(0,0,1);
glVertex2d(xi,yi);
}
glEnd();

//3rdcircle
x_c=200,y_c=250,r=115;
glBegin(GL_POLYGON);
for(count=1;count<=10000;count++)
{
theta=theta+0.001;
xi=x_c + r * cos (theta);
yi=y_c + r * sin (theta);
glColor3f(0.5,0.5,1);
glVertex2d(xi,yi);
}
glEnd();
//4thcircle
x_c=200,y_c=250,r=90;
glBegin(GL_POLYGON);
for(count=1;count<=10000;count++)
{
theta=theta+0.001;
xi=x_c + r * cos (theta);
yi=y_c + r * sin (theta);
glColor3f(0,0,0);
glVertex2d(xi,yi);
}
glEnd();

//THE POLYGON

glColor3f(1.0f, 1.0f, 1.0f); // sets color
glBegin(GL_POLYGON);
glVertex2i(100, 100); // vertex 1
glVertex2f(200, 100); // vertex 2
glVertex2f(200, 200); // vertex 3
glVertex2f(100, 200); // vertex 4

glEnd();
glFlush();
glTranslatef(50,10 ,0);
//TRIANGLES
//1
glBegin(GL_TRIANGLES);
glColor3f(.2,1,0.5);
glVertex2i(160,210);
glVertex2i(220,220);
glVertex2i(190,240);
glEnd();
glTranslatef(50,10 ,0);

//2
glBegin(GL_TRIANGLES);
glColor3f(1,1,0);
glVertex2i(150,110);
glVertex2i(200,200);
glVertex2i(190,120);
glEnd();
glTranslatef(88 ,80 ,0);
glEnd();
//3
glBegin(GL_TRIANGLES);
glColor3f(.2,1,0.5);
glVertex2i(160,210);
glVertex2i(220,220);
glVertex2i(190,240);

glFlush();
glRotatef(180,0,0,1);
glTranslatef(0 ,10 ,0);
glEnd();
//4

glBegin(GL_TRIANGLES);
glColor3f(1,1,0);
glVertex2i(150,110);
glVertex2i(200,200);
glVertex2i(190,120);

glRotatef(180,0,0,1);
glTranslatef(10 ,90 ,0);
glEnd();

glFlush();
}

void Initial ()
{
glClearColor(1,1,1,1);
glMatrixMode(GL_PROJECTION);
gluOrtho2D(0,400,0,500);
}

//main

void main()
{
glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB);
glutInitWindowSize (320,400);
glutInitWindowPosition (50,50);
glutCreateWindow("Shapes");
Initial();
glutDisplayFunc(drawShapes);
glutMainLoop();
}
ne555 (10692)
[code] "Please use code tags" [/code]
http://www.cplusplus.com/forum/articles/40071/#msg218019

main must return int
edit: glutInit() ?
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glBegin(GL_QUADS);
glVertex2i(10,10); //1
glVertex2i(10,490); //2
glVertex2i(390,490); //3
glVertex2i(390,10); //4
glVertex2i(10,10); //5?
gluOrtho2D(0.0, 640.0, 0.0, 480.0);
glEnd();


You could use gluDisk() for the circles (then a scale?)
Last edited on
computer student (3)
plz help me :(

this is my code I modify it and i get good result but when the output window resized , u see some problem i dont no why!!

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    #include <windows.h>
#include <GL/glut.h>
#include <math.h>

void drawShapes()
{

 //the circules
  //1st one
  GLfloat  xi,yi,theta=0;
  GLfloat x_c,y_c,r;
  int count;

  x_c=200,y_c=250,r=160;
  glBegin(GL_POLYGON);
  for(count=1;count<=10000;count++)
  {
  theta=theta+0.001;
  xi=x_c + r * cos (theta);
  yi=y_c + r * sin (theta);
  glColor3f(1,0,1);
  glVertex2d(xi,yi);
  }
  glEnd();

 //2nd one
  x_c=200,y_c=250,r=130;
  glBegin(GL_POLYGON);
  for(count=1;count<=10000;count++)
  {
  theta=theta+0.001;
  xi=x_c + r * cos (theta);
  yi=y_c + r * sin (theta);
  glColor3f(0,0,1);
  glVertex2d(xi,yi);
  }
  glEnd();

  //3rdcircle
  x_c=200,y_c=250,r=115;
  glBegin(GL_POLYGON);
  for(count=1;count<=10000;count++)
  {
  theta=theta+0.001;
  xi=x_c + r * cos (theta);
  yi=y_c + r * sin (theta);
  glColor3f(0.5,0.5,1);
  glVertex2d(xi,yi);
  }
  glEnd();
//4thcircle
  x_c=200,y_c=250,r=90;
  glBegin(GL_POLYGON);
  for(count=1;count<=10000;count++)
  {
  theta=theta+0.001;
  xi=x_c + r * cos (theta);
  yi=y_c + r * sin (theta);
  glColor3f(0,0,0);
  glVertex2d(xi,yi);
  }
  glEnd();



  //THE POLYGON

  glColor3f(1.0f, 1.0f, 1.0f); // sets color
  glBegin(GL_POLYGON);
  glVertex2i(150, 180); // vertex 1
  glVertex2f(250, 180); // vertex 2
  glVertex2f(250, 315); // vertex 3
  glVertex2f(150, 315); // vertex 4

   glEnd();
   glFlush();
glTranslatef(50,10 ,0);
glEnd();
  //TRIANGLES
  //1
  glBegin(GL_TRIANGLES);
  glColor3f(0,1,0);
   glVertex2i(300,370);
  glVertex2i(300,450);
 glVertex2i(200,450);
  glEnd();
  
//2
  glBegin(GL_TRIANGLES);
  glColor3f(1,1,0);
  glVertex2i(300,10);
  glVertex2i(300,90);
  glVertex2i(170,10);
    
  glEnd();
//3
  glBegin(GL_TRIANGLES);
  glColor3f(.2,1,0.5);
  glVertex2i(10,10);
  glVertex2i(110,10);
  glVertex2i(10,110);
 
glEnd();
//4
  glBegin(GL_TRIANGLES);
  glColor3f(1,1,0);
  glVertex2i(10,370);
  glVertex2i(140,450);
  glVertex2i(10,450);

  glEnd(); 
  glFlush();
}

///////////////////////////////////

void Initial ()
{
 glClearColor(0.0,0.0,0.0,0.0);       // set black background color 
	glMatrixMode(GL_PROJECTION); 
	glLoadIdentity(); 
; 
 gluOrtho2D(0,400,0,500);
}

////////the main

int  main()
{ 
 glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB);
 glutInitWindowSize (300,340);
 glutInitWindowPosition (50,50);
 glutCreateWindow("Abeer_Q2");
  Initial();
 glutDisplayFunc(drawShapes);
 glutMainLoop();
return 0;
}
Last edited on
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