gnustep/libs-gui
0
0
Fork 0
mirror of https://github.com/gnustep/libs-gui.git synced 2025-04-22 18:11:06 +00:00
Code Issues Projects Releases Packages Wiki Activity

Handle curves correctly when appending a path. Fix numerical stability issue in appendBezierPathWithArcFromPoint:toPoint:radius:.

Browse source 
git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/gui/trunk@14369 72102866-910b-0410-8b05-ffd578937521
This commit is contained in:
Alexander Malmberg 2002-08-29 22:14:48 +00:00
parent 80b0d5b3a9
commit b52d785f08
2 changed files with 25 additions and 7 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
ChangeLog
View file

@ -1,3 +1,11 @@
2002-08-30 00:11 Alexander Malmberg <alexander@malmberg.org>
* Source/NSBezierPath.m (-appendBezierPath:): Handle curves
correctly.
(-appendBezierPathWithArcFromPoint:toPoint:radius:): Fix numerical
stability issue by clamping dx1 and dx2 manually.
2002-08-29 Richard Frith-Macdonald <rfm@gnu.org>
* Source/GSDisplayServer.m:

24
Source/NSBezierPath.m
View file

@ -818,9 +818,9 @@ static float default_miter_limit = 10.0;
[self lineToPoint: points[0]];
break;
case NSCurveToBezierPathElement:
[self curveToPoint: points[0]
controlPoint1: points[1]
controlPoint2: points[2]];
[self curveToPoint: points[2]
controlPoint1: points[0]
controlPoint2: points[1]];
break;
case NSClosePathBezierPathElement:
[self closePath];
@ -1005,12 +1005,12 @@ static float default_miter_limit = 10.0;
NSPoint p;
p = [self currentPoint];
x1 = point1.x;
y1 = point1.y;
dx1 = p.x - x1;
dy1 = p.y - y1;
l= dx1*dx1 + dy1*dy1;
if (l <= 0)
{
@ -1046,13 +1046,23 @@ static float default_miter_limit = 10.0;
p.x = x1 + (dx1 + dx2)*l;
p.y = y1 + (dy1 + dy2)*l;
a1 = acos(dx1)/PI*180;
if (dx1 < -1)
a1 = 180;
else if (dx1 > 1)
a1 = 0;
else
a1 = acos(dx1)/PI*180;
if (dy1 < 0)
{
a1 = -a1;
}
a2 = acos(dx2)/PI*180;
if (dx2 < -1)
a2 = 180;
else if (dx2 > 1)
a2 = 0;
else
a2 = acos(dx2)/PI*180;
if (dy2 < 0)
{
a2 = -a2;