1 files changed, 69 insertions, 0 deletions
diff --git a/src/common/RegularPolyShape.m b/src/common/RegularPolyShape.m
new file mode 100644
index 0000000..a369ae1
--- /dev/null
+++ b/src/common/RegularPolyShape.m
@@ -0,0 +1,69 @@
+//
+//  RegularPolyShape.m
+//  TikZiT
+//  
+//  Copyright 2011 Aleks Kissinger. All rights reserved.
+//  
+//  
+//  This file is part of TikZiT.
+//  
+//  TikZiT is free software: you can redistribute it and/or modify
+//  it under the terms of the GNU General Public License as published by
+//  the Free Software Foundation, either version 3 of the License, or
+//  (at your option) any later version.
+//  
+//  TikZiT is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//  GNU General Public License for more details.
+//  
+//  You should have received a copy of the GNU General Public License
+//  along with TikZiT.  If not, see <http://www.gnu.org/licenses/>.
+//  
+
+#import "RegularPolyShape.h"
+#import "Node.h"
+#import "Edge.h"
+
+@implementation RegularPolyShape
+
+- (id)initWithSides:(int)sides rotation:(float)rotation {
+	[super init];
+	
+	float rad = 0.25f;
+	
+	NSMutableArray *nodes = [NSMutableArray arrayWithCapacity:sides];
+	NSMutableArray *edges = [NSMutableArray arrayWithCapacity:sides];
+	
+	float dtheta = (M_PI * 2.0f) / ((float)sides);
+	float theta = rotation;
+	int i;
+	float maxY=0.0f, minY=0.0f;
+	NSPoint p;
+	for (i = 0; i < sides; ++i) {
+		p.x = rad * cos(theta);
+		p.y = rad * sin(theta);
+		if (p.y<minY) minY = p.y;
+		if (p.y>maxY) maxY = p.y;
+		
+		[nodes addObject:[Node nodeWithPoint:p]];
+		theta += dtheta;
+	}
+	
+	float dy = (minY + maxY) / 2.0f;
+	
+	for (i = 0; i < sides; ++i) {
+		p = [[nodes objectAtIndex:i] point];
+		p.y -= dy;
+		[[nodes objectAtIndex:i] setPoint:p];
+		[edges addObject:[Edge edgeWithSource:[nodes objectAtIndex:i]
+									andTarget:[nodes objectAtIndex:(i+1)%sides]]];
+	}
+	
+	paths = [[NSSet alloc] initWithObjects:edges,nil];
+	return self;
+}
+
+@end
+
+// vi:ft=objc:ts=4:noet:sts=4:sw=4