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  [odejava] matrix bug report & patch  (Read 1146 times)
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Offline matheng10

Senior Newbie




Java games rock!


« Posted 2004-04-25 16:12:05 »

Hi i found that i got inconsistent reading from Geom.getRotation
it seems that ODE continuosly move matrix structures around so we need an updateReference before every read. (I think we also need to call updateReference also before getPosition while getQuaternion always copy the correct ode quaternion)
I don't know if this is correct ODE behaviour or is caused by some other bug.
I also found that indices for both body.setRotation and geom.setRotation were wrong and different from the ones from getRotation (as ODE uses always vectors of 4 element even if it needs only 3)
so here's my cumulative patch for both of this bug.
Index: Geom.java
===================================================================
RCS file: /cvs/odejava/odejava/src/org/odejava/Geom.java,v
retrieving revision 1.4
diff -r1.4 Geom.java
136,141c136,141
<               Ode.floatArray_setitem(tmpArray, 3, r.getElement(1, 0));
<               Ode.floatArray_setitem(tmpArray, 4, r.getElement(1, 1));
<               Ode.floatArray_setitem(tmpArray, 5, r.getElement(1, 2));
<               Ode.floatArray_setitem(tmpArray, 6, r.getElement(2, 0));
<               Ode.floatArray_setitem(tmpArray, 7, r.getElement(2, 1));
<               Ode.floatArray_setitem(tmpArray, 8, r.getElement(2, 2));
---
>               Ode.floatArray_setitem(tmpArray, 4, r.getElement(1, 0));
>               Ode.floatArray_setitem(tmpArray, 5, r.getElement(1, 1));
>               Ode.floatArray_setitem(tmpArray, 6, r.getElement(1, 2));
>               Ode.floatArray_setitem(tmpArray, 8, r.getElement(2, 0));
>               Ode.floatArray_setitem(tmpArray, 9, r.getElement(2, 1));
>               Ode.floatArray_setitem(tmpArray, 10, r.getElement(2, 2));
172a173
>               updateReferences();
202a204
>               updateReferences();
Index: Body.java
===================================================================
RCS file: /cvs/odejava/odejava/src/org/odejava/Body.java,v
retrieving revision 1.27
diff -r1.27 Body.java
296,301c298,303
<         Ode.floatArray_setitem(tmpArray, 3, r.getElement(1, 0));
<         Ode.floatArray_setitem(tmpArray, 4, r.getElement(1, 1));
<         Ode.floatArray_setitem(tmpArray, 5, r.getElement(1, 2));
<         Ode.floatArray_setitem(tmpArray, 6, r.getElement(2, 0));
<         Ode.floatArray_setitem(tmpArray, 7, r.getElement(2, 1));
<         Ode.floatArray_setitem(tmpArray, 8, r.getElement(2, 2));
---
>         Ode.floatArray_setitem(tmpArray, 4, r.getElement(1, 0));
>         Ode.floatArray_setitem(tmpArray, 5, r.getElement(1, 1));
>         Ode.floatArray_setitem(tmpArray, 6, r.getElement(1, 2));
>         Ode.floatArray_setitem(tmpArray, 8, r.getElement(2, 0));
>         Ode.floatArray_setitem(tmpArray, 9, r.getElement(2, 1));
>         Ode.floatArray_setitem(tmpArray, 10, r.getElement(2, 2));

Would someone with CVS access check in this in HEAD?
Offline William Denniss

JGO Coder


Projects: 2


Fire at will


« Reply #1 - Posted 2004-04-25 23:36:34 »

ok, it's in.

Will.

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