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#### Collision Detection

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#### Collision Detection

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 Post subject: Collision Detection  Posted: October 27th, 2017, 9:53 pm

Joined: October 27th, 2017, 9:51 pm
Posts: 1
Code:
bool Game::Collision(int playerX, int playerY, int playerWidth, int playerHeight, int objectX, int objectY, int objectWidth, int objectHeight)
{
//draws images at the top left corner (0,0)
int playerTop = playerX + playerWidth;
int playerBottom = ;
int playerLeft= playerY + playerHeight;
int playerRight = ;

int objectTop = objectX + objectWidth;
int objectBottom = objectY;
int objectLeft = objectY + objectHeight;
int objectRight = ;

/*if(playerWidth >= objectTop ||  <= objectBottom
&& )*/
}

I am trying to find all sides of the two rectangles. I do not know how to calculate the bottom and right side of each rectangle...can somebody please assist me?

Thanks

 Post subject: Re: Collision Detection  Posted: October 27th, 2017, 11:04 pm

Joined: January 19th, 2017, 10:28 pm
Posts: 517
Location: Idiot from northern Europe
Code:
int playerTop = playerX + playerWidth;

this makes no sense. Player top should be just playerY
playerX + playerWidth should give you the players right side.

Code:
int playerBottom = ;

y + height since y is the top

Code:
int playerLeft= playerY + playerHeight;

this also doesn't make sense to me. playerLeft should just be playerX
playerY + playerHeight should give you the players bottom like I metioned above

Code:
int playerRight = ;

x + width since x is left.

here's how the coordinate system looks like.
black arrow points to the position of the rect. top left corner since that's where it's being drawn from.
meaning:
x = left
x + width = right
y = top
y + height = bottom

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 Post subject: Re: Collision Detection  Posted: October 28th, 2017, 5:11 am

Joined: February 28th, 2013, 3:23 am
Posts: 2962
Location: Oklahoma, United States
Or in code:
left = x;
top = y;
right = left + width;
bottom = top + height;

As Yumtard mentioned, the screen coordinates positive directions are right and down, so adding to X moves to the right and adding to Y moves downward.

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