[ODE] XODE - finalisation

Tue Mar 30 09:28:52 MST 2004

Royce,

Good point - I think the best option would be to allow multiple <mass>
elements for a body.  They would be combined by the program.

Basically what you have done but without the need for <submass>

eg.
        <body>
            <mass density="8">
                <transform>
                    <position x="-0.5" y="0" z="4" />
                    <rotation x="0" y="0" z="0" />
                    <scale x="1" y="1" z="1" />
                </transform>
                <box
                    sizex="2"
                    sizey="2"
                    sizez="2" />
            </mass>
            <mass density="2">
                <transform>
                    <position x="-0.5" y="0" z="4" />
                    <rotation x="0" y="0" z="0" />
                    <scale x="1" y="1" z="1" />
                </transform>
                <box
                    sizex="1"
                    sizey="1"
                    sizez="0.5" />
            </mass>
        </body>

How does that sound?

Cheers,

Will.

On Tue, 2004-03-30 at 03:05, Royce Mitchell III wrote:
> I just have one more issue that I can foresee:
> 
> How would you handle the description of complex masses without resorting 
> to the matrix?
> 
> Would this be correct?
> 
>             <mass density="10">
>                 <transform>
>                     <position x="0" y="0" z="0" />
>                     <rotation x="0" y="0" z="0" />
>                     <scale x="1" y="1" z="1" />
>                 </transform>
>                 <box
>                     sizex="2"
>                     sizey="2"
>                     sizez="2">
>                     <transform>
>                         <position x="-0.5" y="0" z="4" />
>                         <rotation x="0" y="0" z="0" />
>                         <scale x="1" y="1" z="1" />
>                     </transform>
>                 </box>
>                 <box
>                     sizex="1"
>                     sizey="1"
>                     sizez="0.5">
>                     <transform>
>                         <position x="-0.5" y="0" z="4" />
>                         <rotation x="0" y="0" z="0" />
>                         <scale x="1" y="1" z="1" />
>                     </transform>
>                 </box>
>             </mass>
> 
> Now that I've pasted it here, I think you need to specify a density for 
> each primitive, so even this won't suffice. Any ideas? Perhaps something 
> more like this:
> 
>         <mass density="10">
>             <transform>
>                 <position x="0" y="0" z="0" />
>                 <rotation x="0" y="0" z="0" />
>                 <scale x="1" y="1" z="1" />
>             </transform>
>             <submass density="8">
>                 <transform>
>                     <position x="-0.5" y="0" z="4" />
>                     <rotation x="0" y="0" z="0" />
>                     <scale x="1" y="1" z="1" />
>                 </transform>
>                 <box
>                     sizex="2"
>                     sizey="2"
>                     sizez="2" />
>             </submass>
>             <submass density="2">
>                 <transform>
>                     <position x="-0.5" y="0" z="4" />
>                     <rotation x="0" y="0" z="0" />
>                     <scale x="1" y="1" z="1" />
>                 </transform>
>                 <box
>                     sizex="1"
>                     sizey="1"
>                     sizez="0.5" />
>             </submass>
>         </mass>
> 
> I think you really want/need to address this before finalizing the schema...
> 
> Royce3
> 
-- 
William Denniss - will@ http://tanksoftware.com/