ref: beae8dac32f4778a34615ca2a6974c31931386e5
parent: aedec2397743842a9cacce2e0560a093b4f50d52
author: Fabien Sanglard <[email protected]>
date: Fri Dec 14 04:49:21 EST 2012
Fixed comment in inside about xor operation.
--- a/Engine/src/engine.c
+++ b/Engine/src/engine.c
@@ -4313,13 +4313,13 @@
y2 = wall[wal->point2].y-y;
// Compare the sign of y1 and y2.
- // If (y1^y2) < 0 then y is above or below both wal->y and wall[wal->point2].y.
+ // If (y1^y2) < 0 : y1 and y2 have different sign bit: y is between wal->y and wall[wal->point2].y.
if ((y1^y2) < 0)
{x1 = wal->x-x;
x2 = wall[wal->point2].x-x;
- //Again, compare the sign of x1 and x2. If (x1^x2) >= 0 then x is on the left or the right of both wal->x and wall[wal->point2].x.
+ //If (x1^x2) >= 0 x1 and x2 have identic sign bit: x is on the left or the right of both wal->x and wall[wal->point2].x.
if ((x1^x2) >= 0)
{// Euh...je ne sais pas.....