Merge remote-tracking branch 'github/master'

[xonotic/netradiant.git] / regression_tests / q3map2 / disappearing_sliver3 / NOTES.txt

diff --git a/regression_tests/q3map2/disappearing_sliver3/NOTES.txt b/regression_tests/q3map2/disappearing_sliver3/NOTES.txt
index aebd534f5dc8a969cc4e85321961c6f4f701e66d..70bb752a587e7a540448e436414bd548609e3bdb 100644 (file)
--- a/regression_tests/q3map2/disappearing_sliver3/NOTES.txt
+++ b/regression_tests/q3map2/disappearing_sliver3/NOTES.txt
@@ -34,3 +34,39 @@ After clipping side 0 against side 1 should have
 **** (-262144, -33762.8) -> (262144, 63722)
 ************
 
+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)
+************
+