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Comform Assignment 2 - Problem 6 · posted by vaibhav bhawsar Sep 21, 2007

Problem 6. Create a function called drawClock that takes as arguments an hour (float), a minute (float) and a number of seconds (float), and draws an analog clock. Feel free to add a pendulum or any other fancy clock accoutrements.

void drawClock( float hours, float min, float sec)
{
	float HOURANGLE = 30;//for every hour the hand moves 360/12//
	float MINANGLE = 6; //for every minute the hand moves 360/60//
	float SECANGLE = 6; //for every second the hand moves 360/60//
	float hour = hours;
	float minutes = min;
	float seconds = sec;	
	float hourA = ((12-hour)*HOURANGLE)+90; //add 90 to correct rotation
	float minutesA = ((60-minutes)*MINANGLE)+90;
	float secondsA = ((60-seconds)*SECANGLE)+90;	
	Vec2d center(windowW/2,windowW/2);
	float clockRadius = 100;
	drawCircle(center,clockRadius,30);
        // //
	glColor3f(1,0,0);
	glLineWidth(3);
	glPushMatrix();
	glTranslatef(center.x,center.y,0);
	glRotatef(hourA,0,0,1);
	glBegin(GL_LINE_LOOP);
	glVertex2f(0,0);
	glVertex2f(30,0);
	glEnd();
	glPopMatrix();
        // //
	glColor3f(1,1,0);	
	glLineWidth(2);
	glPushMatrix();
	glTranslatef(center.x,center.y,0);
	glRotatef(minutesA,0,0,1);
	glBegin(GL_LINE_LOOP);
	glVertex2f(0,0);
	glVertex2f(50,0);
	glEnd();
	glPopMatrix();
	// //
	glColor3f(1,0,1);	
	glLineWidth(1);	
	glPushMatrix();
	glTranslatef(center.x,center.y,0);
	glRotatef(secondsA,0,0,1);
	glBegin(GL_LINE_LOOP);
	glVertex2f(0,0);
	glVertex2f(70,0);
	glEnd();
	glPopMatrix();
}