more regression test updates by Rambetter
This commit is contained in:
Rudolf Polzer
parent
ec64df5697
commit
1ba2ff7e29
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@ -103,9 +103,7 @@ ChopWindingInPlace() calls in the above stack trace:
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(87.989571 -891.969116 -768.174316)
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(133.998917 -1014.997314 0.000000)
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(If you want to print this out for yourself, print out the coordinates of the
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winding_t "w" parameter right after the ChopWindingInPlace() call in
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CreateBrushWindings() in brush.c.)
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(If you want to print this out for yourself, use winding_logging.patch.)
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The same vertices after the bugfix have the following coordinates:
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@ -0,0 +1,87 @@
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Index: tools/quake3/q3map2/brush.c
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===================================================================
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--- tools/quake3/q3map2/brush.c (revision 371)
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+++ tools/quake3/q3map2/brush.c (working copy)
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@@ -356,17 +356,29 @@
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winding_t *w;
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side_t *side;
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plane_t *plane;
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+
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+ static int brushord = -1;
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+ brushord++;
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+
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+ Sys_Printf("In CreateBrushWindings() for brush %i\n", brushord);
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-
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/* walk the list of brush sides */
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for( i = 0; i < brush->numsides; i++ )
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{
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+ Sys_Printf(" Handling side %i on the brush\n", i);
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+
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/* get side and plane */
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side = &brush->sides[ i ];
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plane = &mapplanes[ side->planenum ];
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/* make huge winding */
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w = BaseWindingForPlane( plane->normal, plane->dist );
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+
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+ Sys_Printf(" Before clipping we have:\n");
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+ int z;
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+ for (z = 0; z < w->numpoints; z++) {
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+ Sys_Printf(" (%.8f %.8f %.8f)\n", w->p[z][0], w->p[z][1], w->p[z][2]);
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+ }
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/* walk the list of brush sides */
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for( j = 0; j < brush->numsides && w != NULL; j++ )
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@@ -379,6 +391,11 @@
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continue;
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plane = &mapplanes[ brush->sides[ j ].planenum ^ 1 ];
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ChopWindingInPlace( &w, plane->normal, plane->dist, 0 ); // CLIP_EPSILON );
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+
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+ Sys_Printf(" After clipping w/ side %i we have:\n", j);
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+ for (z = 0; z < w->numpoints; z++) {
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+ Sys_Printf(" (%.8f %.8f %.8f)\n", w->p[z][0], w->p[z][1], w->p[z][2]);
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+ }
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/* ydnar: fix broken windings that would generate trifans */
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FixWinding( w );
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Index: tools/quake3/q3map2/map.c
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===================================================================
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--- tools/quake3/q3map2/map.c (revision 371)
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+++ tools/quake3/q3map2/map.c (working copy)
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@@ -803,7 +803,11 @@
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char shader[ MAX_QPATH ];
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int flags;
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+ static int brushord = -1;
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+ brushord++;
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+ Sys_Printf("In ParseRawBrush() for brush %i\n", brushord);
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+
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/* initial setup */
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buildBrush->numsides = 0;
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buildBrush->detail = qfalse;
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@@ -812,9 +816,12 @@
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if( g_bBrushPrimit == BPRIMIT_NEWBRUSHES )
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MatchToken( "{" );
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+ int sideord = -1;
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+
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/* parse sides */
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while( 1 )
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{
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+ sideord++;
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if( !GetToken( qtrue ) )
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break;
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if( !strcmp( token, "}" ) )
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@@ -917,6 +924,10 @@
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}
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/* find the plane number */
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+ Sys_Printf(" Side %i:\n", sideord);
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+ Sys_Printf(" (%f %f %f)\n", planePoints[0][0], planePoints[0][1], planePoints[0][2]);
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+ Sys_Printf(" (%f %f %f)\n", planePoints[1][0], planePoints[1][1], planePoints[1][2]);
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+ Sys_Printf(" (%f %f %f)\n", planePoints[2][0], planePoints[2][1], planePoints[2][2]);
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planenum = MapPlaneFromPoints( planePoints );
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side->planenum = planenum;
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@ -14,5 +14,55 @@ compile for any Q3 mod.
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SOLUTION TO PROBLEM:
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====================
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None yet. The problem is likely caused by sloppy math operations (significant
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loss of precision).
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It was discovered that BaseWindingForPlane() in polylib.c did some sloppy
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mathematics with significant loss of precision. Those problems have been
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addressed in commit revision 371.
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POSSIBLE SIDE EFFECTS:
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======================
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Great care was taken to preserve the exact behavior of the original
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BaseWindingForPlane() function except for the loss of precision. Therefore
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no negative side effects should be seen. In fact performance may be
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increased.
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IN-DEPTH DISCUSSION:
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====================
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Turns out that the problem is very similar to the original disappearing_sliver
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regression test. You should read that README.txt to familiarize yourself
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with the situation.
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The thing we need to look at is side 0 of brush 0, if you applied
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winding_logging.patch from disappearing_sliver regression test:
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In ParseRawBrush() for brush 0
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Side 0:
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(6784.000000 16241.000000 -1722.000000)
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(6144.000000 16083.000000 -1443.000000)
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(6144.000000 16122.000000 -1424.000000)
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That is the exact plane defninition of our problem sliver, and in fact those
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are also the correct points for the actual vertices of the triangle.
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Now the results of the winding for this surface after all the clipping takes
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place:
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(6784.12500000 16241.02343750 -1722.06250000)
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(6144.00000000 16082.99218750 -1443.00781250)
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(6144.00000000 16122.00000000 -1424.00390625)
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As you can see, 6784.12500000 is more than epsilon distance (0.1) away from
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the correct point. This is a big problem.
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After we apply the fix committed in revision 371, the result after clipping
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is this:
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(6784.06250000 16241.01171875 -1722.03515625)
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(6144.00000000 16082.99609375 -1443.00781250)
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(6144.00000000 16122.00000000 -1424.00585938)
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As you can see, all points but one have an increase in accuracy. This is
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still not accurate enough in my opinion, but is a step in the right direction.
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17
regression_tests/q3map2/disappearing_sliver3/README.txt
Normal file
17
regression_tests/q3map2/disappearing_sliver3/README.txt
Normal file
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@ -0,0 +1,17 @@
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DESCRIPTION OF PROBLEM:
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=======================
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The example map, maps/disappearing_sliver3.map, contains an example of this
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bug. The triangle sliver surface in the middle of the room is not rendered
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in the final BSP.
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To trigger the bug, compile the map; you don't need -vis or -light. Only
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-bsp (the first q3map2 stage) is necessary to trigger the bug. The only
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entities in the map are a light and a info_player_deathmatch, so the map will
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compile for any Q3 mod.
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SOLUTION TO PROBLEM:
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====================
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None yet. Probably due to sloppy math code.
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@ -0,0 +1,68 @@
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{
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"classname" "worldspawn"
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{
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( 6144 16122 -2048 ) ( 6144 16083 -2048 ) ( 6784 16241 -2048 ) radiant_regression_tests/tile 0 0 0 0.500000 0.500000 134217728 0 0
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( 6144 16122 -1424 ) ( 6144 16122 -2048 ) ( 6784 16241 -1722 ) common/caulk 0 0 0 0.500000 0.500000 134217728 4 0
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( 6144 16083 -1443 ) ( 6144 16083 -2048 ) ( 6144 16122 -1424 ) common/caulk 0 0 0 0.500000 0.500000 134217728 4 0
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( 6784 16241 -1722 ) ( 6784 16241 -2048 ) ( 6144 16083 -1443 ) common/caulk 0 0 0 0.500000 0.500000 134217728 4 0
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( 6784 16241 -1722 ) ( 6144 16083 -1443 ) ( 6144 16122 -1424 ) common/caulk 0 0 0 0.500000 0.500000 134217728 4 0
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}
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{
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( 6160 16432 -2240 ) ( 6048 16432 -2240 ) ( 6048 15936 -2240 ) common/caulk 0 0 0 0.500000 0.500000 0 4 0
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( 6128 15936 -1376 ) ( 6128 16432 -1376 ) ( 6240 16432 -1376 ) common/caulk 0 0 0 0.500000 0.500000 0 4 0
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( 6032 15936 160 ) ( 6144 15936 160 ) ( 6144 15936 -3552 ) common/caulk 0 0 0 0.500000 0.500000 0 4 0
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( 6144 15936 -512 ) ( 6144 16432 -512 ) ( 6144 16432 -4224 ) radiant_regression_tests/tile 0 0 0 0.500000 0.500000 0 0 0
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( 6112 16896 160 ) ( 6000 16896 160 ) ( 6000 16896 -3552 ) common/caulk 0 0 0 0.500000 0.500000 0 4 0
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( 6136 16424 168 ) ( 6136 15928 168 ) ( 6136 15928 -3544 ) common/caulk 0 0 0 0.500000 0.500000 0 4 0
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}
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{
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( 6144 16672 -2240 ) ( 6136 16672 -2240 ) ( 6136 16176 -2240 ) common/caulk 0 0 0 0.500000 0.500000 0 4 0
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( 6136 16192 -1376 ) ( 6136 16688 -1376 ) ( 6144 16688 -1376 ) common/caulk 0 0 0 0.500000 0.500000 0 4 0
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( 6136 15936 -1280 ) ( 6144 15936 -1280 ) ( 6144 15936 -1760 ) common/caulk 0 0 0 0.500000 0.500000 0 4 0
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( 6792 16160 -1296 ) ( 6792 16656 -1296 ) ( 6792 16656 -1776 ) common/caulk 0 0 0 0.500000 0.500000 0 4 0
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( 6144 16896 -1312 ) ( 6136 16896 -1312 ) ( 6136 16896 -1792 ) common/caulk 0 0 0 0.500000 0.500000 0 4 0
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( 6784 16672 -1968 ) ( 6784 16176 -1968 ) ( 6784 16176 -2448 ) radiant_regression_tests/tile 0 0 0 0.500000 0.500000 0 0 0
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}
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{
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( 6784 15936 -2240 ) ( 6144 15936 -2240 ) ( 6144 15880 -2240 ) common/caulk 0 0 0 0.500000 0.500000 0 4 0
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( 6144 15880 -1376 ) ( 6144 15936 -1376 ) ( 6784 15936 -1376 ) common/caulk 0 0 0 0.500000 0.500000 0 4 0
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( 6144 15928 -896 ) ( 6784 15928 -896 ) ( 6784 15928 -2048 ) common/caulk 0 0 0 0.500000 0.500000 0 4 0
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( 6784 15880 -1568 ) ( 6784 15936 -1568 ) ( 6784 15936 -2720 ) common/caulk 0 0 0 0.500000 0.500000 0 4 0
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( 6784 15936 -896 ) ( 6144 15936 -896 ) ( 6144 15936 -2048 ) radiant_regression_tests/tile 0 0 0 0.500000 0.500000 0 0 0
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( 6144 15936 -1568 ) ( 6144 15880 -1568 ) ( 6144 15880 -2720 ) common/caulk 0 0 0 0.500000 0.500000 0 4 0
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}
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{
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( 6784 16960 -2240 ) ( 6144 16960 -2240 ) ( 6144 16896 -2240 ) common/caulk 0 0 0 0.500000 0.500000 0 4 0
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( 6144 16896 -1376 ) ( 6144 16960 -1376 ) ( 6784 16960 -1376 ) common/caulk 0 0 0 0.500000 0.500000 0 4 0
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( 6144 16896 -896 ) ( 6784 16896 -896 ) ( 6784 16896 -2048 ) radiant_regression_tests/tile 0 0 0 0.500000 0.500000 0 0 0
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( 6784 16896 -1568 ) ( 6784 16960 -1568 ) ( 6784 16960 -2720 ) common/caulk 0 0 0 0.500000 0.500000 0 4 0
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( 6784 16904 -896 ) ( 6144 16904 -896 ) ( 6144 16904 -2048 ) common/caulk 0 0 0 0.500000 0.500000 0 4 0
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( 6144 16960 -1568 ) ( 6144 16896 -1568 ) ( 6144 16896 -2720 ) common/caulk 0 0 0 0.500000 0.500000 0 4 0
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}
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{
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( 6784 16896 -1376 ) ( 6144 16896 -1376 ) ( 6144 16536 -1376 ) radiant_regression_tests/tile 0 0 0 0.500000 0.500000 0 0 0
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( 6144 16552 -1368 ) ( 6144 16912 -1368 ) ( 6784 16912 -1368 ) common/caulk 0 0 0 0.500000 0.500000 0 4 0
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( 6144 15936 -1224 ) ( 6784 15936 -1224 ) ( 6784 15936 -1336 ) common/caulk 0 0 0 0.500000 0.500000 0 4 0
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( 6784 16536 -1264 ) ( 6784 16896 -1264 ) ( 6784 16896 -1376 ) common/caulk 0 0 0 0.500000 0.500000 0 4 0
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( 6784 16896 -1264 ) ( 6144 16896 -1264 ) ( 6144 16896 -1376 ) common/caulk 0 0 0 0.500000 0.500000 0 4 0
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( 6144 16896 -1264 ) ( 6144 16536 -1264 ) ( 6144 16536 -1376 ) common/caulk 0 0 0 0.500000 0.500000 0 4 0
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}
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{
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( 6784 16584 -2248 ) ( 6144 16584 -2248 ) ( 6144 15976 -2248 ) common/caulk 0 0 0 0.500000 0.500000 0 4 0
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( 6144 15936 -2240 ) ( 6144 16544 -2240 ) ( 6784 16544 -2240 ) radiant_regression_tests/tile 0 0 0 0.500000 0.500000 0 0 0
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( 6144 15936 -2240 ) ( 6784 15936 -2240 ) ( 6784 15936 -2568 ) common/caulk 0 0 0 0.500000 0.500000 0 4 0
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( 6784 15936 -2240 ) ( 6784 16544 -2240 ) ( 6784 16544 -2568 ) common/caulk 0 0 0 0.500000 0.500000 0 4 0
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( 6784 16896 -2240 ) ( 6144 16896 -2240 ) ( 6144 16896 -2568 ) common/caulk 0 0 0 0.500000 0.500000 0 4 0
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( 6144 16544 -2240 ) ( 6144 15936 -2240 ) ( 6144 15936 -2568 ) common/caulk 0 0 0 0.500000 0.500000 0 4 0
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}
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}
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{
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"angle" "180"
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"origin" "6432 16168 -2144"
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"classname" "info_player_deathmatch"
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}
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{
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"light" "1000"
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"origin" "6504 16160 -2152"
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"classname" "light"
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}
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