Merged all forks, works well

ImageViewGridLayer.h

@@ -5,6 +5,7 @@
 //  Created by Johannes Fahrenkrug on 20.02.10.
 //  Copyright 2010 Springenwerk. All rights reserved.
 //
+//  Concave Polygons Bug Fixed by Ivan Bastidas on 09/05/2010.
 
 #import <Quartz/Quartz.h>
 #import <Cocoa/Cocoa.h>
@@ -23,5 +24,5 @@
 @property (assign) VertexDocument *document;
 @property (assign) int rows;
 @property (assign) int cols;
-
+-(BOOL) calcWithPoint:(CGPoint)point1 secondPoint: (CGPoint)point2 thirdPoint:(CGPoint)point3 fourthPoint: (CGPoint)point4;
 @end

ImageViewGridLayer.m

@@ -5,10 +5,11 @@
 //  Created by Johannes Fahrenkrug on 20.02.10.
 //  Copyright 2010 Springenwerk. All rights reserved.
 //
+//	Concave Polygons Bug Fixed by Ivan Bastidas on 09/05/2010.
 
 #import "ImageViewGridLayer.h"
 #import "VertexDocument.h"
-
+#define RAD_TO_DEG(rad) ( (180.0 * (rad)) / M_PI )
 // Thanks to Bill Dudney (http://bill.dudney.net/roller/objc/entry/nscolor_cgcolorref)
 @interface NSColor(CGColor)
 - (CGColorRef)CGColor;
@@ -31,6 +32,7 @@ @implementation ImageViewGridLayer
 
 @synthesize owner, document, rows, cols;
 
+
 // -------------------------------------------------------------------------
 //	init
 // -------------------------------------------------------------------------
@@ -152,7 +154,25 @@ -(CALayer *)hitTest:(CGPoint)aPoint {
 			relativePoint.x = (p.x - ((currentCol - 1) * colWidth)) - (colWidth / 2);
 			relativePoint.y = (p.y - ((currentRow - 1) * rowHeight)) - (rowHeight / 2);
 
-			[document addPoint:relativePoint forRow:currentRow col:currentCol];
+			NSMutableArray *points = [[document.pointMatrix objectAtIndex:(currentRow - 1)] objectAtIndex:(currentCol - 1)];
+			if ([points count]>1 ) {
+
+			NSPoint point3 = [[points objectAtIndex:[points count]-2] pointValue];
+			NSPoint point2 = [[points objectAtIndex:[points count]-1] pointValue];
+			NSPoint point1 = [[points objectAtIndex:0] pointValue];
+
+				if ([self  calcWithPoint:point1 secondPoint:point2 thirdPoint:relativePoint fourthPoint:point3]) {
+					[document addPoint:relativePoint forRow:currentRow col:currentCol];
+				}else {
+					return nil; 
+				}
+
+
+			}else {
+				[document addPoint:relativePoint forRow:currentRow col:currentCol];
+			}
+
+
 		}
 
 	}
@@ -163,6 +183,48 @@ -(CALayer *)hitTest:(CGPoint)aPoint {
 		return nil;    
 	}
 }
+-(BOOL) calcWithPoint:(CGPoint)point1 secondPoint: (CGPoint)point2 thirdPoint:(CGPoint)point3 fourthPoint: (CGPoint)point4{
+	double ang1 = RAD_TO_DEG(atan2(point2.y-point1.y,point2.x - point1.x));
+	//NSLog(@"Angulo 1 = %1.2f",ang1);
+	if (ang1<0) {
+		ang1 = 180+ang1;
+	}
+	//NSLog(@"Transformado = %1.2f",ang1);
+	double ang2 = RAD_TO_DEG(atan2(point3.y-point2.y,point3.x - point2.x));
+
+	//NSLog(@"Angulo 2 = %1.2f",ang2);
+	if (ang2>=0) {
+		ang2 = 180-ang2;
+	}else {
+		ang2 = (ang2+180) * -1;
+	}
+	//NSLog(@"Transformado = %1.2f",ang2);
+
+	double total = ang1+ang2;
+
+
+	double ang3 = RAD_TO_DEG(atan2(point2.y-point4.y,point2.x - point4.x));
+	//NSLog(@"Angulo 3 = %1.2f",ang3);
+	if (ang3<0) {
+		ang3 = 180+ang3;
+		ang2 = RAD_TO_DEG(atan2(point3.y-point2.y,point3.x - point2.x))*-1;
+	}
+
+	//NSLog(@"Transformado = %1.2f",ang3);
+
+	double total2 = ang2+ang3;
+	//NSLog(@"Angulo Interno Suma = %1.2f",total);
+	//NSLog(@"Angulo Interno = %1.2f",total2);
+	if ((total <= 180 && total>=0) && (total2 <= 180 && total2>=0)) {
+
+		return YES;
+
+	}else {
+		return NO;
+	}
+
+
+}
 
 - (void)dealloc
 {

PrioritySplitViewDelegate.h

@@ -8,7 +8,7 @@
 
 #import <Cocoa/Cocoa.h>
 
-@interface PrioritySplitViewDelegate : NSObject
+@interface PrioritySplitViewDelegate : NSObject<NSSplitViewDelegate>
 {
 	NSMutableDictionary *lengthsByViewIndex;
 	NSMutableDictionary *viewIndicesByPriority;

SWScrollView.h

@@ -0,0 +1,17 @@
+//
+//  SWScrollView.h
+//  VertexHelper
+//
+//  Created by Jon Gilkison on 9/15/11.
+//  Copyright 2011 Interfacelab LLC. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+
+@interface SWScrollView : NSScrollView {
+@private
+
+}
+
+@end

SWScrollView.m

@@ -0,0 +1,37 @@
+//
+//  SWScrollView.m
+//  VertexHelper
+//
+//  Code from Nicholas Riley
+//
+//  Created by Nicholas Riley on 1/25/10.
+//  Copyright 2010 Nicholas Riley. All rights reserved.
+//
+
+#import "SWScrollView.h"
+#import <Quartz/Quartz.h>
+
+@interface IKImageClipView : NSClipView
+- (NSRect)docRect;
+@end
+
+@implementation SWScrollView
+
+- (void)reflectScrolledClipView:(NSClipView *)cView;
+{
+    NSView *_imageView = [self documentView];
+    [super reflectScrolledClipView:cView];
+    if ([_imageView isKindOfClass:[IKImageView class]] &&
+        [[self contentView] isKindOfClass:[IKImageClipView class]] &&
+        [[self contentView] respondsToSelector:@selector(docRect)]) {
+        NSSize docSize = [(IKImageClipView *)[self contentView] docRect].size;
+        NSSize scrollViewSize = [self contentSize];
+
+        if (docSize.height > scrollViewSize.height || docSize.width > scrollViewSize.width)
+            ((IKImageView *)_imageView).autohidesScrollers = NO;
+        else
+            ((IKImageView *)_imageView).autohidesScrollers = YES;
+    }
+}
+
+@end

SWUndo.h

@@ -0,0 +1,23 @@
+//
+//  SWUndo.h
+//  VertexHelper
+//
+//  Created by Jon Gilkison on 9/16/11.
+//  Copyright 2011 Interfacelab LLC. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+
+@interface SWUndo : NSObject {
+    NSInteger col,row;
+    NSMutableArray *points;
+}
+
+@property (readonly) NSInteger col;
+@property (readonly) NSInteger row;
+@property (readonly) NSMutableArray *points;
+
++(SWUndo *)undoForMatrix:(NSMutableArray *)pointMatrix col:(NSInteger)c row:(NSInteger)r;
+
+@end

SWUndo.m

@@ -0,0 +1,41 @@
+//
+//  SWUndo.m
+//  VertexHelper
+//
+//  Created by Jon Gilkison on 9/16/11.
+//  Copyright 2011 Interfacelab LLC. All rights reserved.
+//
+
+#import "SWUndo.h"
+
+
+@implementation SWUndo
+
+@synthesize points, col, row;
+
+- (id)initWithPointMatrix:(NSMutableArray *)pointMatrix col:(NSInteger)c row:(NSInteger)r 
+{
+    self = [super init];
+    if (self) {
+        col=c;
+        row=r;
+        points=[[NSMutableArray alloc] initWithArray:[[pointMatrix objectAtIndex:r] objectAtIndex:c] copyItems:YES];
+    }
+
+    return self;
+}
+
+- (void)dealloc
+{
+    [points release];
+    [super dealloc];
+}
+
+
++(SWUndo *)undoForMatrix:(NSMutableArray *)pointMatrix col:(NSInteger)c row:(NSInteger)r
+{
+    return [[[SWUndo alloc] initWithPointMatrix:pointMatrix col:c row:r] autorelease];
+}
+
+
+@end

VertexDocument.h

@@ -13,7 +13,7 @@
 
 @class PrioritySplitViewDelegate;
 
-@interface VertexDocument : NSDocument
+@interface VertexDocument : NSDocument<NSWindowDelegate>
 {
 	IBOutlet NSTextField *rowsTextField;
 	IBOutlet NSTextField *colsTextField;
@@ -32,12 +32,17 @@
 	IBOutlet NSSplitView *splitView;
 	PrioritySplitViewDelegate *splitViewDelegate;
 
+	IBOutlet NSSlider *angleSlider;
+	IBOutlet NSTextField *angleField;
+
 	ImageViewGridLayer *gridLayer;
 	// each row has columns, each column has points
 	NSMutableArray *pointMatrix;
 	NSString *filePath;
 	BOOL gridOK;
 	BOOL imageLoaded;
+
+    IBOutlet NSTextField *box2DRatioField;
 }
 
 - (IBAction)updateGrid:(id)sender;
@@ -47,6 +52,9 @@
 - (IBAction)scanImage:(id)sender;
 - (IBAction)resetVertices:(id)sender;
 
+- (IBAction)angleSliderChanged:(NSSlider*)sender;
+- (IBAction)angleFieldChanged:(NSTextField*)sender;
+
 - (void)addPoint:(NSPoint)aPoint forRow:(int)aRow col:(int)aCol;
 - (void)updateResultTextField;