Open

Sorry about the title of the post. My hand slipped and hit enter. My program displays an image and text when it is compiled. I am trying to add/modify objects each time I click the left or right button of the mouse. The reason all the time functions are similar is because I am trying to change/draw over the polygon with a same size polygon but a different time. When the program starts, the polygon displays 1:30:00 PM. When I click the first time, the polygon is replaced with a same size polygon with the time of 1:45:00 PM. When I click for a second time the polygon disappears. I am trying to loop the mouse click so I can keep replacing the polygon with a different time each time I click the left button. Any help is appreciated.


#include<windows.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include<Gl/gl.h>
#include<GL/glut.h>
 
int n;
int m;
int onMouse = 1;
int *image;
void *font = GLUT_BITMAP_HELVETICA_12;
 
void mouseClicks(int button, int state, int x, int y) {
     if(button == GLUT_LEFT_BUTTON)
        onMouse++;
 
}
 
void output(int x, int y, char *string)
{
  int len, i;
 
  glRasterPos2f(x, y);
  len = (int) strlen(string);
  for (i = 0; i < len; i++) {
    glutBitmapCharacter(font, string[i]);
  }
}
void Time1 ()
{
    glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
    glColor3f(0.0,0.8,0.0);
    glBegin(GL_POLYGON);
        glVertex2f(230.0,893.0);
        glVertex2f(355.0,893.0);
        glVertex2f(355.0,845.0);
        glVertex2f(230.0,845.0);
    glEnd();
    glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
    glColor3f(0.0,0.0,0.0);
    glBegin(GL_POLYGON);
        glVertex2f(230.0,893.0);
        glVertex2f(355.0,893.0);
        glVertex2f(355.0,845.0);
        glVertex2f(230.0,845.0);
    glEnd();
    output(235.0,880.0,"Time");
    glRasterPos2f(235.0,855.0);
    glutBitmapCharacter(GLUT_BITMAP_TIMES_ROMAN_24,'1');
    glutBitmapCharacter(GLUT_BITMAP_TIMES_ROMAN_24,':');
    glutBitmapCharacter(GLUT_BITMAP_TIMES_ROMAN_24,'3');
    glutBitmapCharacter(GLUT_BITMAP_TIMES_ROMAN_24,'0');
    glutBitmapCharacter(GLUT_BITMAP_TIMES_ROMAN_24,':');
    glutBitmapCharacter(GLUT_BITMAP_TIMES_ROMAN_24,'0');
    glutBitmapCharacter(GLUT_BITMAP_TIMES_ROMAN_24,'0');
    glutBitmapCharacter(GLUT_BITMAP_TIMES_ROMAN_24,' ');
    glutBitmapCharacter(GLUT_BITMAP_TIMES_ROMAN_24,'P');
    glutBitmapCharacter(GLUT_BITMAP_TIMES_ROMAN_24,'M');
}
 
void Time2 ()
{
    glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
    glColor3f(0.0,0.8,0.0);
    glBegin(GL_POLYGON);
        glVertex2f(230.0,893.0);
        glVertex2f(355.0,893.0);
        glVertex2f(355.0,845.0);
        glVertex2f(230.0,845.0);
    glEnd();
    glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
    glColor3f(0.0,0.0,0.0);
    glBegin(GL_POLYGON);
        glVertex2f(230.0,893.0);
        glVertex2f(355.0,893.0);
        glVertex2f(355.0,845.0);
        glVertex2f(230.0,845.0);
    glEnd();
    output(235.0,880.0,"Time");
    glRasterPos2f(235.0,855.0);
    glutBitmapCharacter(GLUT_BITMAP_TIMES_ROMAN_24,'1');
    glutBitmapCharacter(GLUT_BITMAP_TIMES_ROMAN_24,':');
    glutBitmapCharacter(GLUT_BITMAP_TIMES_ROMAN_24,'4');
    glutBitmapCharacter(GLUT_BITMAP_TIMES_ROMAN_24,'5');
    glutBitmapCharacter(GLUT_BITMAP_TIMES_ROMAN_24,':');
    glutBitmapCharacter(GLUT_BITMAP_TIMES_ROMAN_24,'0');
    glutBitmapCharacter(GLUT_BITMAP_TIMES_ROMAN_24,'0');
    glutBitmapCharacter(GLUT_BITMAP_TIMES_ROMAN_24,' ');
    glutBitmapCharacter(GLUT_BITMAP_TIMES_ROMAN_24,'P');
    glutBitmapCharacter(GLUT_BITMAP_TIMES_ROMAN_24,'M');
}
 
void Time3 ()
{
    glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
    glColor3f(0.0,0.8,0.0);
    glBegin(GL_POLYGON);
        glVertex2f(230.0,893.0);
        glVertex2f(355.0,893.0);
        glVertex2f(355.0,845.0);
        glVertex2f(230.0,845.0);
    glEnd();
    glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
    glColor3f(0.0,0.0,0.0);
    glBegin(GL_POLYGON);
        glVertex2f(230.0,893.0);
        glVertex2f(355.0,893.0);
        glVertex2f(355.0,845.0);
        glVertex2f(230.0,845.0);
    glEnd();
    output(235.0,880.0,"Time");
    glRasterPos2f(235.0,855.0);
    glutBitmapCharacter(GLUT_BITMAP_TIMES_ROMAN_24,'2');
    glutBitmapCharacter(GLUT_BITMAP_TIMES_ROMAN_24,':');
    glutBitmapCharacter(GLUT_BITMAP_TIMES_ROMAN_24,'0');
    glutBitmapCharacter(GLUT_BITMAP_TIMES_ROMAN_24,'0');
    glutBitmapCharacter(GLUT_BITMAP_TIMES_ROMAN_24,':');
    glutBitmapCharacter(GLUT_BITMAP_TIMES_ROMAN_24,'0');
    glutBitmapCharacter(GLUT_BITMAP_TIMES_ROMAN_24,'0');
    glutBitmapCharacter(GLUT_BITMAP_TIMES_ROMAN_24,' ');
    glutBitmapCharacter(GLUT_BITMAP_TIMES_ROMAN_24,'P');
    glutBitmapCharacter(GLUT_BITMAP_TIMES_ROMAN_24,'M');
}
 
void Draw ()
{
    glDrawPixels(n,m,GL_RGB, GL_UNSIGNED_INT, image);
    glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
    glColor3f(0.0,0.8,0.0);
	glBegin(GL_POLYGON);
        glVertex2f(8.0, 893.0);
        glVertex2f(210.0, 893.0);
        glVertex2f(210.0, 645.0);
        glVertex2f(8.0, 645.0);
    glEnd();
    glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
    glColor3f(0.0,0.0,0.0);
    glBegin(GL_POLYGON);
        glVertex2f(8.0, 893.0);
        glVertex2f(210.0, 893.0);
        glVertex2f(210.0, 645.0);
        glVertex2f(8.0, 645.0);
    glEnd();
    glColor3f(0.0,0.0,0.0);
    output(13,880,"Legend");
    output(13,860,"* - Custer's Headquarters Unit");
    output(13,847,"F - Custer's Command");
    output(13,834,"C - Custer's Command");
    output(13,821,"E - Custer's Command");
    output(13,808,"I - Custer's Command");
    output(13,795,"L - Custer's Command");
    output(13,782,"A - Reno's Command");
    output(13,769,"M - Reno's Command");
    output(13,756,"G - Reno's Command");
    output(13,743,"H - Benteen's Command");
    output(13,730,"D - Benteen's Command");
    output(13,717,"K - Benteen's Command");
    output(13,704,"B - Packtrain Guard");
    output(13,691,"Packtrain - Blank Cavalry Unit");
    output(13,678,"G - Gall (Hunkpapa Warchief)");
    output(13,665,"C - Crazy Horse (Oglala Warchief");
    output(13,652,"IU(n) - 34 Blank Indian Units");
}
 
void myInit (void)
{
     glClearColor ( 1.0, 1.0, 1.0 , 1.0);
     glColor3f ( 1.0f, 0.0f, 0.0f );
     glPointSize ( 4.0 );
     glMatrixMode ( GL_PROJECTION );
     glLoadIdentity ( );
     gluOrtho2D ( 0.0, 400.0, 0.0, 400.0 );
}
 
void myreshape(int h, int w)
{
	glMatrixMode (GL_PROJECTION);
	glLoadIdentity();
	gluOrtho2D(0.0, (GLfloat) n, 0.0, (GLfloat) m);
	glMatrixMode(GL_MODELVIEW);
	glLoadIdentity();
	glViewport(0,0,h,w);
}
 
void display(void)
{
 
	glClear ( GL_COLOR_BUFFER_BIT );
	glRasterPos2i(0,0);
    Draw();
    if (onMouse == 1)
        Time1();
    else if (onMouse == 2)
        Time2();
    else if (onMouse == 3)
        Time3();
 
 
    glFlush ();
}
 
int main(int argc, char**argv)
{
	FILE *fd;
	int k, nm;
	char c;
	char b[70];
	float s;
	char red, green, blue;
	int x, y;
 
	fd = fopen("map.ppm", "r");
	if(fd == 0)
	{
		exit(0);
	}
 
 
	fscanf(fd, "%s", b);
	if((b[0] != 'P') || (b[1] != '6'))
	{
		printf("%s is not a PPM file!
", b);
		exit(0);
	}
 
	fscanf(fd, "%c", &c);
 
	fscanf(fd, "%c", &c);
	while(c == '#')
	{
		fscanf(fd, "%[^
]", b);
		printf("%s
", b);
		fscanf(fd, "%c", &c);
		printf("%c", c);
	}
 
	ungetc(c,fd);
 
	fscanf(fd, "%d %d %d", &n, &m, &k);
 
	printf("%d rows  %d colums  max value = %d
", n, m, k);
 
	nm = n*m;
 
	image = (int*)malloc(3*sizeof(GLint)*nm);
 
	s = 255./k;
 
	for(x = 0; x < m; x++)
	{
		for(y = n-1; y >= 0; y--)
		{
           fscanf(fd, "%c", &red);
    	   fscanf(fd, "%c", &green);
	       fscanf(fd, "%c", &blue);
 
		   image[3*nm - 3*(x*n +y) -3] = green;
		   image[3*nm - 3*(x*n +y) -2] = blue;
		   image[3*nm - 3*(x*n +y) -1] = red;
 
		}
	}
 
 
	glutInit(&argc, argv);
	glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
	glutInitWindowSize(n,m);
	glutInitWindowPosition(0,0);
	glutCreateWindow("Little BigHorn");
	glutReshapeFunc(myreshape);
	glutMouseFunc(mouseClicks);
	glutDisplayFunc(display);
	glPixelTransferf(GL_RED_SCALE, s);
	glPixelTransferf(GL_GREEN_SCALE, s);
	glPixelTransferf(GL_BLUE_SCALE, s);
	glPixelStorei(GL_UNPACK_SWAP_BYTES, GL_TRUE);
	glClearColor(1.0, 1.0, 1.0, 1.0);
	myInit ( );
 
    glutMainLoop ( );
 
}