// ----------------------------------------------------------------

// From Game Programming in C++ by Sanjay Madhav

// Copyright (C) 2017 Sanjay Madhav. All rights reserved.

//

// Released under the BSD License

// See LICENSE in root directory for full details.

// ----------------------------------------------------------------

#include "CircleComponent.h"

#include "Actor.h"

CircleComponent::CircleComponent(class Actor* owner)

:Component(owner)

,mRadius(0.0f)

{

}

const Vector2& CircleComponent::GetCenter() const

{

return mOwner->GetPosition();

}

float CircleComponent::GetRadius() const

{

return mOwner->GetScale() * mRadius;

}

bool Intersect(const CircleComponent& a, const CircleComponent& b)

{

// Calculate distance squared

Vector2 diff = a.GetCenter() - b.GetCenter();

float distSq = diff.LengthSq();

// Calculate sum of radii squared

float radiiSq = a.GetRadius() + b.GetRadius();

radiiSq *= radiiSq;

return distSq <= radiiSq;

}