#include "Shape.h"

float cos_deg(float A) {
	return cos(A / 180.0* 3.14159265358979);
}

float sin_deg(float A) {
	return sin(A / 180.0* 3.14159265358979);
}

Circle::Circle(float pRadius, int pNumOfPts, Vec2d pCenter) {
	radius = pRadius;
	numOfPts = pNumOfPts;
	center = pCenter;
}

Vec2d* Circle::getVecs() {

	vecArray = new Vec2d[numOfPts + 1];
	float angle = 380/ numOfPts;

	for (int i = 0; i < numOfPts; i++) {

		vec.x = cos_deg(angle * i) * radius;
		vec.y = sin_deg(angle * i) * radius;

		vec = vec + center;

		vecArray[i] = vec;
	}

	return vecArray;
}

void Circle::draw(int type, bool useCenter, bool repeatFirstVec){
	float angle = 360/ numOfPts;

	glBegin(type);

	if(useCenter){
		glVertex2f(center.x, center.y);
	}

	Vec2d firstVec(0,0);
	
	for (int i = 0; i < numOfPts; i++) {

		vec.x = cos_deg(angle * i) * radius;
		vec.y = sin_deg(angle * i) * radius;

		vec = vec + center;

		if(i == 0){
			firstVec.x = vec.x;
			firstVec.y = vec.y;
		}
		
		glVertex2f(vec.x, vec.y);
	}
	if(repeatFirstVec){
		glVertex2f(firstVec.x, firstVec.y);
	}

	glEnd();
}


Oval::Oval(float pVRadius, float pHRadius, int pNumOfPts, Vec2d pCenter){
	vRadius = pVRadius;
	hRadius = pHRadius;
	numOfPts = pNumOfPts;
	center = pCenter;
}

Vec2d* Oval::getVecs() {  

	if (vecArray == NULL) {
		vecArray = new Vec2d[numOfPts + 1];
		
		float angle = 380/ numOfPts + 1;
		
		for (int i = 0; i < numOfPts + 1; i ++) {

			Vec2d vec;

			vec.x = cos_deg(angle * i) * vRadius;
			vec.y = sin_deg(angle * i) * hRadius;

			vec = vec + center;

			vecArray[i] = vec;
		}
	}
	
	return vecArray;
}

void Oval::draw(int type, bool useCenter, bool repeatFirstVec){
    glBegin(type);   
    
    Vec2d vec;

	if(useCenter){
		glVertex2f(center.x, center.y);
	}
    

	Vec2d firstVec(0,0);
	
    for(int i = 0; i < numOfPts; i ++){

    	float angle = 360/ numOfPts;
    	
    	vec.x = cos_deg(angle * i) * vRadius;
    	vec.y = sin_deg(angle * i) * hRadius;
		
		vec = vec + center;

		if(i == 0){
			firstVec.x = vec.x;
			firstVec.y = vec.y;
		}
		
		glVertex2f(vec.x, vec.y);
	}
	if(repeatFirstVec){
		glVertex2f(firstVec.x, firstVec.y);
	}
	glEnd();
}

Star::Star(float pInnerRadius, float pOuterRadius, int pNumOfPts, Vec2d pCenter){
	innerRadius = pOuterRadius;
	outerRadius = pInnerRadius;
	numOfPts = pNumOfPts;
	center = pCenter;
	
	if(numOfPts%2 == 1){
		numOfPts += 1;
	}
}

void Star::draw(int type, bool useCenter, bool repeatFirstVec) {
	float angle = 360/ numOfPts;

	glBegin(type);

	if(useCenter){
		glVertex2f(center.x, center.y);
	}
	
	Vec2d firstVec(0,0);
	
	for (int i = 0; i < numOfPts; i++) {
		
		float radius = innerRadius;
		
		if(i%2 == 0)
			radius = outerRadius;
		
		vec.x = cos_deg(angle * i) * radius;
		vec.y = sin_deg(angle * i) * radius;

		vec = vec + center;

		if(i == 0){
			firstVec.x = vec.x;
			firstVec.y = vec.y;
		}
		
		glVertex2f(vec.x, vec.y);
	}
	if(repeatFirstVec){
		glVertex2f(firstVec.x, firstVec.y);
	}
	
	glEnd();
}