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In branch Rambetter-math-fix-experiments. 

Simplifying segmentation_fault and adding some random notes for regression
tests.


git-svn-id: svn://svn.icculus.org/gtkradiant/GtkRadiant/branches/Rambetter-math-fix-experiments@387 8a3a26a2-13c4-0310-b231-cf6edde360e5
This commit is contained in:
rambetter 2010-12-31 00:28:39 +00:00
parent cbdff39b12
commit 938dddb6b2
3 changed files with 46 additions and 1 deletions
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36
regression_tests/q3map2/disappearing_sliver3/NOTES.txt Normal file
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@ -0,0 +1,36 @@
Random notes for Rambetter, don't expect to understand this:
============================================================
Brush 0 is the problem.
Side 0 is the problem (under surf tri).
Side 1 is the +y 4-face.
Side 2 is the -x 4-face.
Side 3 is the -y 4-face.
side 4 is the +z tri.
(6144, 16122) -> (6784, 16241)
x "climb" of side 1 is 6784 - 6144 = 640.
y "climb" of side 1 is 16241 - 16122 = 119.
x/y "climb rate" of side 1 is 640 / 119 = 5.378151261.
After clipping side 0 against side 1, we get
************
**** (-262144, -33762.8125) -> (262144, 63722)
************
The slope of that is (262144 + 262144) / (63722 + 33762.8125) = 5.378150571.
(-262144, y) -> (6784, 16241)
So (6784 + 262144) / (16241 - y) = 640 / 119
So y = 16241 - ((119 * (6784 + 262144)) / 640) = -33762.8
(6144, 16122) -> (262144, y)
So (262144 - 6144) / (y - 16122) = 640 / 119
So y = 16122 + ((119 * (262144 - 6144)) / 640) = 63722
After clipping side 0 against side 1 should have
************
**** (-262144, -33762.8) -> (262144, 63722)
************

10
regression_tests/q3map2/segmentation_fault/README.txt
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@ -12,6 +12,16 @@ To trigger the bug, compile the map; you don't need -vis or -light. Only
entities in the map are a light and a info_player_deathmatch, so the map will
compile for any Q3 mod.
Here is a description of the problem brush (brush #0):
side 0: -z face
side 1: +z face
side 2: -y face
side 3: +x face
side 4: +y face
side 5: -x face
side 6: problem side "accidentally showed up" :-)
SOLUTION TO PROBLEM:
====================

1
regression_tests/q3map2/segmentation_fault/maps/segmentation_fault.map
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@ -10,7 +10,6 @@
( 10328 17727 -576 ) ( 10272 17727 -576 ) ( 10272 17727 -1600 ) radiant_regression_tests/tile 0 0 0 0.500000 0.500000 134217728 257 0
( 10240 17608 -576 ) ( 10240 17480 -576 ) ( 10240 17480 -1600 ) radiant_regression_tests/tile 0 0 0 0.500000 0.500000 134217728 257 0
( 10240 17727 -576 ) ( 10240 17726 -621 ) ( 10335 17727 -576 ) radiant_regression_tests/tile 0 0 0 0.500000 0.500000 134217728 257 0
( 10272 17472 -592 ) ( 10240 17504 -592 ) ( 10272 17472 -576 ) radiant_regression_tests/tile 0 0 0 0.500000 0.500000 134217728 257 0
}
// brush 1
{