collision in-between a frame?

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collision in-between a frame? #12206 03/27/03 18:23 03/27/03 18:23
Joined: May 2002 Posts: 7,441 ventilator OP Senior Expert
ventilator OP Senior Expert Joined: May 2002 Posts: 7,441	code: ^ \| \| \| \| e1-----------+---------------> \| \| \| \| e2 if i have two entities which start movement at e1 and e2 and the next frame they are positioned at the end of the arrows, is there a collision triggered when they meet in-between a frame but don't touch each other at the beginning or end of the movement?

Re: collision in-between a frame? #12207 03/27/03 23:44 03/27/03 23:44
Joined: Oct 2002 Posts: 8,939 planet.earth ello Senior Expert
ello Senior Expert Joined: Oct 2002 Posts: 8,939 planet.earth	it could be possible thru vector-mathematics, but i dont know exactly how to do it(just a hint) www.earthcontrol.de quoted: We want to maintain a clean, decent, American family suited forum look... which means you may post zombies or chainsaw massacres, but no erotic.

Re: collision in-between a frame? #12208 03/27/03 23:57 03/27/03 23:57
Joined: Oct 2002 Posts: 8,939 planet.earth ello Senior Expert
ello Senior Expert Joined: Oct 2002 Posts: 8,939 planet.earth	hi, i found this one but its in german: this www.earthcontrol.de quoted: We want to maintain a clean, decent, American family suited forum look... which means you may post zombies or chainsaw massacres, but no erotic.

Re: collision in-between a frame? #12209 03/28/03 00:54 03/28/03 00:54
Joined: May 2002 Posts: 7,441 ventilator OP Senior Expert
ventilator OP Senior Expert Joined: May 2002 Posts: 7,441	thanks for the link it's a good summary of vector mathematics. but actually i only would like to know if ent_move detects such a collision?

Re: collision in-between a frame? #12210 03/28/03 04:54 03/28/03 04:54
Joined: Jun 2002 Posts: 248 NZ mudhole Member
mudhole Member Joined: Jun 2002 Posts: 248 NZ	You can only move a single entity at a time. So, say you moved e1 from it's start position to its end position -> No Collision. Then you move e2 from its start position to its end position -> No Collision. You can either resolve this by slowing down the entities -> if they move slower the chance that the collision will be missed is reduced. Or use vector maths to determine the collision point. Not really too difficult -> just the intersection of two lines.

Re: collision in-between a frame? #12211 03/28/03 05:02 03/28/03 05:02
A Anonymous Unregistered
Anonymous Unregistered A	quote: Originally posted by mudhole: Or use vector maths to determine the collision point. Not really too difficult -> just the intersection of two lines. Line intersection won't help much. Better use extruded spheres. This may sound complicated, but is not. Gamasutra has an article on this in its archives.

Re: collision in-between a frame? #12212 03/28/03 05:10 03/28/03 05:10
Joined: May 2002 Posts: 7,441 ventilator OP Senior Expert
ventilator OP Senior Expert Joined: May 2002 Posts: 7,441	now i understand... thanks for your explanation! ... and if i do a trace and an entity passes this ray in-between a frame does it trigger an event then? does this trace ray stay there during all the entity movements until the next frame gets drawn?

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