Collision Detection?

**sir_toke_a_lot** · Sep 3rd, 2002, 06:17 PM

Hi, I'm pretty new to programming games in visual basic, I'm primarly used to internet and misc. programming. My question is simple enough, How do u detect when to images hit? Like imgLion and imgTiger? Some help here would greatly appreciated, thanx!!

**Fox** · Sep 3rd, 2002, 07:14 PM

VB Code:

If (imgLion.left+imgLion.width>imgTiger.left) And (imgLion.top+imgLion.height>imgTiger.top) Then
    If (imgLion.left<imgTiger.left+imgTiger.width) And (imgLion.top<imgTiger.top+imgTiger.height) Then
        'Collision!
    End if
End If

**plenderj** · Sep 5th, 2002, 03:46 AM

As in fox's code there, you basically just check when the dimensions of one box overlap the dimensions of another

**Sastraxi** · Sep 5th, 2002, 06:46 AM

Once you get more serious into game programming you can use the IntersectRect API to check if two RECT structs are colliding

**Fox** · Sep 5th, 2002, 10:36 AM

Once you get more serious into game programming you might want to use a map to do the collisions or (depending on the game) collision circles...

**Sastraxi** · Sep 5th, 2002, 02:59 PM

Or fun pixel (mask) collision

**Fox** · Sep 5th, 2002, 03:48 PM

yay ^^ or the method I mentioned months ago.. each object has collision points AND a collision rect. and you check collision by intersecting the points of object1 with the rect (or a mask) of object2. This would allow nearly pixel-based collision but you only have to check 5-6 points per object.

**Sastraxi** · Sep 5th, 2002, 04:17 PM

Yes, that is a good idea

There are some tricks to increase the speed.

**Fox** · Sep 5th, 2002, 08:09 PM

I'm well-known for my good ideas

**Sastraxi** · Sep 5th, 2002, 08:13 PM

I'm well known for my bad ones, hehe

**Zaei** · Sep 5th, 2002, 08:34 PM

Originally posted by Sastraxi
I'm well known for my bad ones, hehe

I wouldnt say that =).

Z.

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