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//
// PRCurvesPath.m
// PRICE
//
// Created by Riccardo Mottola on Thu 11 August 2011.
// Copyright 2011 Riccardo Mottola. All rights reserved.
//
// This application 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 2 of the License, or (at your option) any later version.
// This program 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.
#import "PRCurvesPath.h"
#import <AppKit/NSColor.h>
@implementation PRCurvesPath
- (id)init
{
self = [super init];
if(self)
{
isEditing = YES;
}
return self;
}
-(void)stroke
{
unsigned i;
[super stroke];
if (isEditing)
for (i = 0; i < [self elementCount]; i++)
{
NSPoint cp[3];
NSBezierPathElement pe;
NSRect cpRect;
pe = [self elementAtIndex: i associatedPoints: cp];
if (pe == NSMoveToBezierPathElement)
{
[[NSColor purpleColor] set];
cpRect = NSMakeRect(cp[2].x - 1, cp[2].y - 1, 3, 3);
[NSBezierPath fillRect: cpRect];
}
else if (pe == NSCurveToBezierPathElement)
{
[[NSColor orangeColor] set];
cpRect = NSMakeRect(cp[0].x - 1, cp[0].y - 1, 3, 3);
[NSBezierPath fillRect: cpRect];
[[NSColor orangeColor] set];
cpRect = NSMakeRect(cp[1].x - 1, cp[1].y - 1, 3, 3);
[NSBezierPath fillRect: cpRect];
[[NSColor purpleColor] set];
cpRect = NSMakeRect(cp[2].x - 1, cp[2].y - 1, 3, 3);
[NSBezierPath fillRect: cpRect];
}
}
}
-(BOOL)isEditing;
{
return isEditing;
}
-(void)setIsEditing: (BOOL)flag
{
isEditing = flag;
}
-(NSArray *)values
{
NSBezierPath *tp;
NSBezierPath *fp;
unsigned i, j;
NSPoint *yVals;
unsigned valsCount;
NSMutableArray *f;
unsigned minX, maxX;
float lastY;
tp = [NSBezierPath bezierPath];
[tp appendBezierPath:(NSBezierPath *)self];
[tp setFlatness: 1.0];
fp = [tp bezierPathByFlatteningPath];
valsCount = [fp elementCount];
yVals = calloc(valsCount, sizeof(NSPoint));
if (yVals == NULL)
return nil;
f = [[NSMutableArray alloc] initWithCapacity: UCHAR_MAX];
for (i = 0; i < valsCount; i++)
{
NSBezierPathElement pe;
NSPoint cp[3];
pe = [fp elementAtIndex: i associatedPoints: cp];
yVals[i] = cp[0];
}
minX = floor(yVals[0].x);
maxX = floor(yVals[valsCount].x);
for (i = 0; i < minX; i++)
[f addObject: [NSNumber numberWithFloat: yVals[0].y]];
for (j = 0; j < valsCount; j++)
{
unsigned k, l;
float y1, y2;
/* find estimation interval (k) and begin/end values y1 y2 */
y1 = yVals[j].y;
l = i;
k = i;
if (j+1 < valsCount)
{
while (k < floor(yVals[j+1].x))
k++;
y2 = yVals[j+1].y;
}
else
{
y2 = y1;
k++;
}
// NSLog(@"%d block %d-%d, y1-y2 %f-%f", j, l, k, y1, y2);
for (; i < k; i++)
{
float a;
a = (float)(i-l)/(k-l);
// NSLog(@"a: %f", a);
[f addObject: [NSNumber numberWithFloat: (y1 + (y2-y1)*a)]];
}
}
lastY = [[f objectAtIndex: [f count]-1] floatValue];
for (; i <= UCHAR_MAX; i++)
[f addObject: [NSNumber numberWithFloat: lastY]];
free(yVals);
return f;
}
@end
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