SDL_Project/GeneralFunc.cpp at main · Playmaker0210/SDL_Project · GitHub

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#include "GeneralFunc.h"

bool SDLGeneralFunc::CheckCollision(const SDL_Rect& object1, const SDL_Rect& object2)
{
  int left_a = object1.x;
  int right_a = object1.x + object1.w;
  int top_a = object1.y;
  int bottom_a = object1.y + object1.h;

  int left_b = object2.x;
  int right_b = object2.x + object2.w;
  int top_b = object2.y;
  int bottom_b = object2.y + object2.h;

  // Case 1: size object 1 < size object 2
  if (left_a > left_b && left_a < right_b)
  {
    if (top_a > top_b && top_a < bottom_b)
    {
      return true;
    }
  }

  if (left_a > left_b && left_a < right_b)
  {
    if (bottom_a > top_b && bottom_a < bottom_b)
    {
      return true;
    }
  }

  if (right_a > left_b && right_a < right_b)
  {
    if (top_a > top_b && top_a < bottom_b)
    {
      return true;
    }
  }

  if (right_a > left_b && right_a < right_b)
  {
    if (bottom_a > top_b && bottom_a < bottom_b)
    {
      return true;
    }
  }

  // Case 2: size object 1 < size object 2
  if (left_b > left_a && left_b < right_a)
  {
    if (top_b > top_a && top_b < bottom_a)
    {
      return true;
    }
  }

  if (left_b > left_a && left_b < right_a)
  {
    if (bottom_b > top_a && bottom_b < bottom_a)
    {
      return true;
    }
  }

  if (right_b > left_a && right_b < right_a)
  {
    if (top_b > top_a && top_b < bottom_a)
    {
      return true;
    }
  }

  if (right_b > left_a && right_b < right_a)
  {
    if (bottom_b > top_a && bottom_b < bottom_a)
    {
      return true;
    }
  }

   // Case 3: size object 1 = size object 2
  if (top_a == top_b && right_a == right_b && bottom_a == bottom_b)
  {
    return true;
  }

  return false;
}

bool SDLGeneralFunc::isInside(int& x, int& y, SDL_Rect object)
{
	if(x >= object.x && x <= object.x+object.w && y >= object.y && y <= object.y + object.h)
    {
        return true;
    }
    return false;
}