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Undoing revision 375 because it did not offer measured accuracy improvements

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in the q3map2 math calculations.


git-svn-id: svn://svn.icculus.org/gtkradiant/GtkRadiant/trunk@376 8a3a26a2-13c4-0310-b231-cf6edde360e5
This commit is contained in:
rambetter 2010-12-28 20:05:50 +00:00
parent 05e2114294
commit 52fd922c64
2 changed files with 21 additions and 2 deletions
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15
regression_tests/q3map2/disappearing_sliver2/README.txt
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@ -66,3 +66,18 @@ is this:
As you can see, all points but one have an increase in accuracy. This is As you can see, all points but one have an increase in accuracy. This is
still not accurate enough in my opinion, but is a step in the right direction. still not accurate enough in my opinion, but is a step in the right direction.
MORE NOTES:
===========
I attempted to improve upon revision 371 by streamlining the code in
BaseWindingForPlane() some more. Those attempts were committed as r375.
After revision 375:
(6784.09375000 16241.01757812 -1722.04687500)
(6144.00000000 16082.99414062 -1443.00390625)
(6144.00000000 16122.00000000 -1424.00097656)
Revision 375 has since been reverted (undone) because of the loss in
accuracy.

8
tools/quake3/common/polylib.c
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@ -253,9 +253,13 @@ winding_t *BaseWindingForPlane (vec3_t normal, vec_t dist)
vright[2] = normal[1]; vright[2] = normal[1];
break; break;
} }
// NOTE: vright is NOT a unit vector at this point.
VectorSetLength(vright, MAX_WORLD_COORD * 2, vright);
CrossProduct(normal, vright, vup); CrossProduct(normal, vright, vup);
// IMPORTANT NOTE: vright and vup are NOT unit vectors at this point.
// However, normal, vup, and vright are pairwise perpendicular.
VectorSetLength(vup, MAX_WORLD_COORD * 2, vup);
VectorSetLength(vright, MAX_WORLD_COORD * 2, vright);
VectorScale(normal, dist, org); VectorScale(normal, dist, org);
w = AllocWinding(4); w = AllocWinding(4);