Ellipse.cpp

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#include "Ellipse.h"
 
Ellipse::Ellipse(Vector2D center, Vector2D size, float rotation) : Shape(center, size / 2.0f, rotation) {}
 
bool Ellipse::IsInShape(Vector2D point) {
    float x = (point.X - center.X);
    float y = (point.Y - center.Y);
 
    float sinR = sinf(rotation * Mathematics::MPID180);
    float cosR = cosf(rotation * Mathematics::MPID180);
 
    float xP = x * cosR - y * sinR; // rotate about center
    float yP = y * cosR + x * sinR; // rotate about center
 
    float xQuot = xP * xP / (size.X * size.X); // size is twice radius
    float yQuot = yP * yP / (size.Y * size.Y);
 
    return xQuot + yQuot < 1.0f;
}