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/* MiscCircleShape.m
Copyright 1996 Uwe Hoffmann.
This notice may not be removed from this source code.
The use and distribution of this software is governed by the
terms of the MiscKit license agreement. Refer to the license
document included with the MiscKit distribution for the terms.
Version 2 (August 1996)
*/
#import <Foundation/Foundation.h>
#import "MiscCircleShape.h"
#import "MiscUserPath.h"
#import "MiscHitPath.h"
@implementation MiscCircleShape
- (NSRect)innerBounds
{
NSRect br,ir;
NSPoint m;
float a,b,cx,cy;
br = [path bounds];
m.x = br.origin.x + br.size.width / 2;
m.y = br.origin.y + br.size.height / 2;
a = br.size.width / 2;
b = br.size.height / 2;
cx = a * 0.57735;
cy = b * 0.81649;
ir.origin.x = m.x - cx;
ir.origin.y = m.y - cy;
ir.size.width = 2 * cx;
ir.size.height = 2 * cy;
return ir;
}
- (MiscShapeType)shapeType
{
return MiscCircleShapeType;
}
- (void)calcIntersection:(NSPoint *)ip angle:(float *)alpha toPoint:(NSPoint)aPoint
{
NSPoint middle,pos;
float s,x0,y0,a,b,width,height,*bbox;
bbox = [path bbox];
pos.x = bbox[0];
pos.y = bbox[1];
width = bbox[2] - bbox[0];
height = bbox[3] - bbox[1];
middle.x = pos.x + width / 2;
middle.y = pos.y + height / 2;
if(aPoint.y == middle.y){
ip->y = middle.y;
if(aPoint.x > middle.x){
*alpha = 0;
ip->x = pos.x + width;
} else {
*alpha = 180;
ip->x = pos.x;
}
return;
}
if(aPoint.x == middle.x){
ip->x = middle.x;
if(aPoint.y > middle.y){
ip->y = pos.y + height;
*alpha = 90;
} else {
ip->y = pos.y;
*alpha = -90;
}
return;
}
s = (aPoint.y - middle.y) / (aPoint.x - middle.x);
*alpha = 57.29577951 * atan(s);
if(aPoint.y > middle.y){
if(aPoint.x > middle.x){ // I. quadrant
x0 = middle.x;
y0 = middle.y;
a = width / 2;
b = height / 2;
ip->x = a*b/sqrt(pow(b,2) + pow(a,2)*pow(s,2)) + x0;
ip->y = (2*a*b*s/sqrt(pow(b,2) + pow(a,2)*pow(s,2)) + 2*y0)/2;
if(ip->y < y0){
ip->x = -(a*b/sqrt(pow(b,2) + pow(a,2)*pow(s,2))) + x0;
ip->y = (-2*a*b*s/sqrt(pow(b,2) + pow(a,2)*pow(s,2)) + 2*y0)/2;
}
} else { // II. quadrant
x0 = middle.x;
y0 = middle.y;
a = width / 2;
b = height / 2;
ip->x = a*b/sqrt(pow(b,2) + pow(a,2)*pow(s,2)) + x0;
ip->y = (2*a*b*s/sqrt(pow(b,2) + pow(a,2)*pow(s,2)) + 2*y0)/2;
if(ip->y < y0){
ip->x = -(a*b/sqrt(pow(b,2) + pow(a,2)*pow(s,2))) + x0;
ip->y = (-2*a*b*s/sqrt(pow(b,2) + pow(a,2)*pow(s,2)) + 2*y0)/2;
}
*alpha += 180;
}
} else {
if(aPoint.x > middle.x){ // IV. quadrant
x0 = middle.x;
y0 = middle.y;
a = width / 2;
b = height / 2;
ip->x = a*b/sqrt(pow(b,2) + pow(a,2)*pow(s,2)) + x0;
ip->y = (2*a*b*s/sqrt(pow(b,2) + pow(a,2)*pow(s,2)) + 2*y0)/2;
if(ip->y > y0){
ip->x = -(a*b/sqrt(pow(b,2) + pow(a,2)*pow(s,2))) + x0;
ip->y = (-2*a*b*s/sqrt(pow(b,2) + pow(a,2)*pow(s,2)) + 2*y0)/2;
}
} else { // III. quadrant
x0 = middle.x;
y0 = middle.y;
a = width / 2;
b = height / 2;
ip->x = a*b/sqrt(pow(b,2) + pow(a,2)*pow(s,2)) + x0;
ip->y = (2*a*b*s/sqrt(pow(b,2) + pow(a,2)*pow(s,2)) + 2*y0)/2;
if(ip->y > y0){
ip->x = -(a*b/sqrt(pow(b,2) + pow(a,2)*pow(s,2))) + x0;
ip->y = (-2*a*b*s/sqrt(pow(b,2) + pow(a,2)*pow(s,2)) + 2*y0)/2;
}
*alpha += 180;
}
}
}
- (void)makePathWithBounds:(NSRect)aRect
{
[path moveto:(aRect.origin.x + aRect.size.width) :(aRect.origin.y + aRect.size.height / 2)];
[path curveto:(aRect.origin.x + aRect.size.width) :(aRect.origin.y + aRect.size.height / 2 * 0.445)
:(aRect.origin.x + aRect.size.width / 2 * 1.555) :aRect.origin.y
:(aRect.origin.x + aRect.size.width / 2) :aRect.origin.y];
[path curveto:(aRect.origin.x + aRect.size.width / 2 * 0.445) :aRect.origin.y
:aRect.origin.x :(aRect.origin.y + aRect.size.height / 2 * 0.445)
:aRect.origin.x :(aRect.origin.y + aRect.size.height / 2)];
[path curveto:aRect.origin.x :(aRect.origin.y + aRect.size.height /2 * 1.555)
:(aRect.origin.x + aRect.size.width / 2 * 0.445) :(aRect.origin.y + aRect.size.height)
:(aRect.origin.x + aRect.size.width / 2) :(aRect.origin.y + aRect.size.height)];
[path curveto:(aRect.origin.x + aRect.size.width / 2 * 1.555) :(aRect.origin.y + aRect.size.height)
:(aRect.origin.x + aRect.size.width) :(aRect.origin.y + aRect.size.height / 2 * 1.555)
:(aRect.origin.x + aRect.size.width) :(aRect.origin.y + aRect.size.height / 2)];
[path closepath];
}
- (void)fillParamsWithBounds:(NSRect)aRect
{
float *params, *bbox;
params = [path params];
bbox = [path bbox];
bbox[0] = aRect.origin.x;
bbox[1] = aRect.origin.y;
bbox[2] = aRect.origin.x + aRect.size.width;
bbox[3] = aRect.origin.y + aRect.size.height;
params[0] = aRect.origin.x + aRect.size.width;
params[1] = aRect.origin.y + aRect.size.height / 2;
params[2] = aRect.origin.x + aRect.size.width;
params[3] = aRect.origin.y + aRect.size.height / 2 * 0.445;
params[4] = aRect.origin.x + aRect.size.width / 2 * 1.555;
params[5] = aRect.origin.y;
params[6] = aRect.origin.x + aRect.size.width / 2;
params[7] = aRect.origin.y;
params[8] = aRect.origin.x + aRect.size.width / 2 * 0.445;
params[9] = aRect.origin.y;
params[10] = aRect.origin.x;
params[11] = aRect.origin.y + aRect.size.height / 2 * 0.445;
params[12] = aRect.origin.x;
params[13] = aRect.origin.y + aRect.size.height / 2;
params[14] = aRect.origin.x;
params[15] = aRect.origin.y + aRect.size.height /2 * 1.555;
params[16] = aRect.origin.x + aRect.size.width / 2 * 0.445;
params[17] = aRect.origin.y + aRect.size.height;
params[18] = aRect.origin.x + aRect.size.width / 2;
params[19] = aRect.origin.y + aRect.size.height;
params[20] = aRect.origin.x + aRect.size.width / 2 * 1.555;
params[21] = aRect.origin.y + aRect.size.height;
params[22] = aRect.origin.x + aRect.size.width;
params[23] = aRect.origin.y + aRect.size.height / 2 * 1.555;
params[24] = aRect.origin.x + aRect.size.width;
params[25] = aRect.origin.y + aRect.size.height / 2;
}
+ (NSSize)calcSizeForInnerSize:(NSSize)aSize
{
NSSize os;
float a,b,cx,cy;
cx = aSize.width / 2;
cy = aSize.height / 2;
a = cx / 0.57735;
b = cy / 0.81649;
os.width = 2 * a;
os.height = 2 * b;
return os;
}
@end
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