Figure 39

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Figure 39
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/*
//Author: Cheikh Drame
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*/

//CS732 Project 1-3
//
#include

void display(void)
{
glClear(GL_COLOR_BUFFER_BIT);
int x, y=0;
//create an Array which holds the shifting position for each row
int position[11]={-6,-12,6,10,3,-9,-3,-9,8,15,2};
//11 rows
for(int i=0;i<11;i++)
{
//x should be the starting x position for the first white square in each row
x=position[i]+50;
// 5 white squares we need to draw for each row
for(int j=0;j<5;j++)
{
//set the square color to be white
glColor3f(1.0,1.0,1.0);
//here should be black square first, since the background color is black, no need to draw.
//draw white square which the length of each side is 50.
glRecti(x,y,x+50,y+50);
//set the border's color to be gray
glColor3f(0.5,0.5,0.5);
glBegin(GL_LINES);
//draw left border for white square
glVertex2i(x,y);
glVertex2i(x,y+50);
//draw right border for white square
glVertex2i(x+50,y);
glVertex2i(x+50,y+50);
glEnd();
//get to the x position for next white square in the same row which is 50(side length of white square) + 50(side length of black square), so no change for y.
x=x+100;
}
//set the line's color to be gray
glColor3f(0.5,0.5,0.5);
//whenever finish drawing the squares in each row, draw a top border for this row
glBegin(GL_LINES);
glVertex2i(0,y);
glVertex2i(550,y);
glEnd();
//get the y position for next row, simply add the length of square's side
y=y+50;
}
glFlush();
}

void main(int argc, char **argv)
{
glutInit(&argc,argv);
glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB);
glutInitWindowSize(550,550);
glutInitWindowPosition(200,100);
glutCreateWindow("Project 1 - The Cafe Wall Illusion by irap123.com");
//make the window to be black color
glClearColor(0.0,0.0,0.0,0.0);
gluOrtho2D(0.0,550.0,0.0,550.0);
glutDisplayFunc(display);
glutMainLoop();
}