house.c

a source code for banker s algorithm

#include<stdio.h>
#include<math.h>
#include<glut.h>
#include<windows.h>

GLfloat house[3][9]={{100.0,100.0,175.0,250.0,250.0,150.0,150.0,200.0,200.0},
{100.0,300.0,400.0,300.0,100.0,100.0,150.0,150.0,100.0},
{1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0}};
GLfloat rot_mat[3][3]={{0},{0},{0}};
GLfloat result[3][9]={{0},{0},{0}};
GLfloat h=100.0;
GLfloat k=100.0;
GLfloat theta;

void multiply()
{
	int i,j,l;
	for(i=0;i<3;i++)
		for(j=0;j<9;j++)
		{
			result[i][j]=0;
			for(l=0;l<3;l++)
	result[i][j]=result[i][j]+rot_mat[i][l]*house[l][j];
		}
}

void rotate()
{
	GLfloat m,n;
	m=-h*(cos(theta)-1)+k*(sin(theta));
	n=-k*(cos(theta)-1)-h*(sin(theta));
	rot_mat[0][0]=cos(theta);
	rot_mat[0][1]=-sin(theta);
	rot_mat[0][2]=m;
	rot_mat[1][0]=sin(theta);
	rot_mat[1][1]=cos(theta);
	rot_mat[1][2]=n;
	rot_mat[2][0]=0;
	rot_mat[2][1]=0;
	rot_mat[2][2]=1;
	multiply();
}
void drawhouse()
{
	glColor3f(0.0,0.0,1.0);
	glBegin(GL_LINE_LOOP);
	glVertex2f(house[0][0],house[1][0]);
	glVertex2f(house[0][1],house[1][1]);
	glVertex2f(house[0][3],house[1][3]);
	glVertex2f(house[0][4],house[1][4]);
	glEnd();
	glColor3f(1.0,0.0,0.0);
	glBegin(GL_LINE_LOOP);
	glVertex2f(house[0][5],house[1][5]);
	glVertex2f(house[0][6],house[1][6]);
	glVertex2f(house[0][7],house[1][7]);
	glVertex2f(house[0][8],house[1][8]);
	glEnd();
		glColor3f(0.0,0.0,1.0);
	glBegin(GL_LINE_LOOP);
	glVertex2f(house[0][1],house[1][1]);
	glVertex2f(house[0][2],house[1][2]);
	glVertex2f(house[0][3],house[1][3]);
	glEnd();
}
void drawrotatedhouse()
{
		glColor3f(0.0,0.0,1.0);
	glBegin(GL_LINE_LOOP);
	glVertex2f(result[0][0],result[1][0]);
	glVertex2f(result[0][1],result[1][1]);
	glVertex2f(result[0][3],result[1][3]);
	glVertex2f(result[0][4],result[1][4]);
	glEnd();

		glColor3f(1.0,0.0,0.0);
	glBegin(GL_LINE_LOOP);
	glVertex2f(result[0][5],result[1][5]);
	glVertex2f(result[0][6],result[1][6]);
	glVertex2f(result[0][7],result[1][7]);
	glVertex2f(result[0][8],result[1][8]);
	glEnd();

	glColor3f(0.0,0.0,1.0);
	glBegin(GL_LINE_LOOP);
	glVertex2f(result[0][1],result[1][1]);
	glVertex2f(result[0][2],result[1][2]);
	glVertex2f(result[0][3],result[1][3]);
	glEnd();
}

void display()
{
	glClear(GL_COLOR_BUFFER_BIT);
	drawhouse();
	rotate();
	drawrotatedhouse();
	glFlush();
}

void myinit()
{
	glClearColor(1.0,1.0,1.0,1.0);
	glColor3f(1.0,0.0,0.0);
	glPointSize(1.0);
	glMatrixMode(GL_PROJECTION);
	glLoadIdentity();
	gluOrtho2D(0.0,499.0,0.0,499.0);
}

void main(int argc, char** argv)
{
	printf("Enter rotate angle\n");
	scanf("%f",&theta);
	glutInit(&argc,argv);
	glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB);
	glutInitWindowSize(500,500);
	glutInitWindowPosition(0,0);
	glutCreateWindow("house");
	glutDisplayFunc(display);
	myinit();
	glutMainLoop();
}