/* CPSC 360 Programming Assignment 3
 * Letters of the alphabet
 * by Chris Bolduc
 * boldu101@chapman.edu
 */

#include "letters.h"

// I have these includes in my header file.  Uncomment them if you don't.
//#include <GL/glut.h>
//#include <math.h>
//#include <stdlib.h>

#ifndef PI
#define PI 3.141592653579
#endif

// Draws the letter F
void draw_f(){ draw_F(); }
void draw_F(){
	glBegin(GL_LINES);
		glVertex2f(0.1,  0.0);
		glVertex2f(0.1,  1.0);
		glVertex2f(0.1,  1.0);
		glVertex2f(0.9,  1.0);
		glVertex2f(0.1,  0.5);
		glVertex2f(0.9,  0.5);
	glEnd();
	glTranslated(1, 0, 0);
}

// Draws the letter P
void draw_p(){ draw_P(); }
void draw_P(){
	int NUM_LINES = 20;
	float xcoord, ycoord, i;
	float l = 0.30;

	glBegin(GL_LINES);
		glVertex2f(0.10, 0.00);
		glVertex2f(0.10, 1.00);
		glVertex2f(0.10, 1.00);
		glVertex2f(0.33, 1.00);
		glVertex2f(0.33, 0.40);
		glVertex2f(0.10, 0.40);
	glEnd();
	// Draw a semicircle
	glTranslated(0.30, 0.70, 0);
	glBegin(GL_LINE_STRIP);
		for(i = -NUM_LINES / 4; i <= NUM_LINES / 4; ++i){
			xcoord = l * cos(i*2*PI/NUM_LINES);
			ycoord = l * sin(i*2*PI/NUM_LINES);
			glVertex2f(xcoord, ycoord);
		}
	glEnd();
	glTranslated(-0.30, -0.70, 0);
	glTranslated(0.7, 0, 0);
}

// Draws the letter Z
void draw_z(){ draw_Z(); }
void draw_Z(){
	glBegin(GL_LINE_STRIP);
		glVertex2f(0.1, 1.0);
		glVertex2f(0.9, 1.0);
		glVertex2f(0.1, 0.0);
		glVertex2f(0.9, 0.0);
	glEnd();
	glTranslated(1, 0, 0);
}