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see that? that's a simple multiplayer game i'm making to test some concepts before I get involved in a bigger project. I've got all these differently scaled rocks you see, and I want to be jumping on top of them and stuff, and i've got collision boxes on them, but I don't want boxes! i want rocks! you see what i'm saying? if the rock slopes, I want to slide down and off, you see? so how can I collide with the rock and not the box, thanks

oh, and isn't my GUI the coolest? lines are bestest

No screenshot appearing, but I get the idea. I'm working on something with a similar requirement.

Use the function: INTERSECT OBJECT()

This looks for collision with a specified object from a given starting point (ie, your player's position) in a given direction. If you specify point 2 as 10 units straight down from your player's position, the command doesn't stop there, it'll look for a collision with the object at any distance, straight down.

So how do you know if your player's standing on a rock, as opposed to jumping or falling through the air? If the collision distance returned by this function is equal to (or less than) the distance from the origin of your player model to his/her/its feet, then you're there.

To determine he slope, look at the collision distance from two or three test points around the area of your player's feet. Then form a triangle with the difference between the (in this case two) measurements.

A_____ B
|........../
|......../
|....../
|..../
|../
|/
C

Leg AC of the triangle is the difference between the two measurements. Leg AB is the distance between your two test points. Angle A is your slope. So, to calculate angle A use the trig function Tangent: Angle_B# = TAN(Opposite/Adjacent) ...or... Angle_B# = TAN(Leg_AC / Leg_AB)

This simple formula is for 2D. The 3D formula is somewhat more complicated. I haven't got it at hand, so if it's a 3D game, let me know and I'll post that for you.

Good luck!

check this thread and download and run the walktest.zip
it may help you
cheers

http://www.realgametools.net/forums/index.php?board=3;action=display;threadid=15135;start=20

ok, sorry, let me simplify my question :-s heh, i'm dumb i know

basically i want to know..

do I have to use object collision boxes?? i'd prefer if my collisions weren't based on a friggin box, cuz I plan on having big ole trees you can climb on and crap and BOXES are not shaped like TREES.. or vise versa

thanks

No. Not if you use the INTERSECT OBJECT() function. The results are based on individual polygons.

ok
i do

intersect object(1, 0, 0, 0, 0, -10, 0) and it returns 0, constantly

Is there an object below that point? The code should look something like this:



Hope this helps.
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