Raydium 3D Game Engine

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PostPosted: Mon Jul 20, 2009 1:06 pm 
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Joined: Thu Sep 29, 2005 2:59 pm
Posts: 828
I've done this function for my own use. It works for me but I'm not sure if it's working 100% as expected for other people. (I'm using ".group" but really I don't know what it is)
It allows to move an object(not just an element) for a certain distance(x,y,z) from its previous position.

Code:
void raydium_ode_object_move_relative_3f( int obj, float x, float y, float z)
{
dReal *refp;
dReal pos[3];
refp=(dReal *)dGeomGetPosition(dSpaceGetGeom(raydium_ode_object[obj].group,0));
pos[0]=refp[0]+x;
pos[1]=refp[1]+y;
pos[2]=refp[2]+z;
raydium_ode_object_move(obj, pos);
}

void raydium_ode_object_move_name_relative_3f( char *name, float x, float y, float z)
{
raydium_ode_object_move_relative_3f(raydium_ode_object_find(name),x,y,z);
}


It's ok? Should I commit this?


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PostPosted: Mon Jul 20, 2009 2:28 pm 
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Joined: Sun Mar 16, 2003 2:53 am
Posts: 2590
Location: gnniiiii (Scrat)
IMHO, no ... This function will move all elements of an object with an offset relative to current position of the "last" element of the object :
dGeomGetPosition(dSpaceGetGeom(raydium_ode_object[obj].group,0)) will return coords of this element (id=0 means, weirdly, "last element" for an ODE space)

I think the correct (generic ?) way to implement this function would be to get position of every element of the object, and apply the provided offset individually. This could be done easily with a slightly modified version of raydium_ode_object_move() ... but it would require a bit of refactoring, since it's not very cool to duplicate a big bunch of code in the core :)


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