Determine if two circles overlap in iOS

Last Update:2015-08-01 Source: Internet

Author: User

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<pre>#import <Foundation/Foundation.h>#import<math.h>@interface point2d:nsobject{Double_x;//x Value Double_y;//y value}//getter and setter for X-values- (void) SetX: (Double) x;- (Double) x;//getter and setter for Y-values- (void) Sety: (Double) y;- (Double) y;//set both X and Y- (void) SetX: (Double) x andY: (Double) y;//Calculate root other point distance- (Double) Distancewithother: (POINT2D *) other;//class method calculates the distance between two points+ (Double) distanceWithOther1: (point2d *) p1 andPoint2: (point2d *) p2, @end @implementation point2d//getter and setter for X-values- (void) SetX: (Double) x{ self->_x =x;}- (Double) x{return_x;}//getter and setter for Y-values- (void) Sety: (Double) y{ self->_y =y;}- (Double) y{return_y;}//set both X and Y- (void) SetX: (Double) x andY: (Double) y{[self setx:x]; [self sety:y];}//calculate the distance between two points- (Double) Distancewithother: (POINT2D *) other{//return [point2d distancewithother1:self andpoint2:other]; DoubleXDelta = [self x]-[other x]; DoubleXDELTAPF = Pow (xDelta,2); DoubleYdelta = [self y]-[other y]; DoubleYDELTAPF = Pow (ydelta,2); returnSQRT (xdeltapf +ydeltapf);}//class method calculates the distance between two points+ (Double) distanceWithOther1: (point2d *) p1 andPoint2: (point2d *) p2{//to invoke a pair method in a class method return[P1 distancewithother:p2];} @end @interface circle:nsobject{//radius Double_radius; //CenterPOINT2D *_point;}//getter and setter of radius- (void) Setradius: (Double) radius;- (Double) radius;//getter and setter at the center- (void) Setpoint: (POINT2D *) point;-(POINT2D *) point;//determine if two circles overlap//class Method+ (BOOL) isInteractBetweenCircle1: (circle *) C1 andCircle2: (circle *) c2;//Object Methods-(BOOL) isinteractbetweencircle: (Circle *) other; @end @implementation Circle//getter and setter of radius- (void) Setradius: (Double) Radius{_radius=radius;}- (Double) radius{return_radius;}//getter and setter at the center- (void) Setpoint: (POINT2D *) Point{_point=point ;}-(POINT2D *) point; { return_point;}//Object Methods-(BOOL) isinteractbetweencircle: (Circle *) other{//look at the relationship between center distance and radius length//Center LengthPOINT2D *P1 =[self point]; POINT2D*P2 =[other point]; DoubleDistance = [p1 distancewithother:p2];//5//radius andNSLog (@"Center Length%f", distance); DoubleRadiussum = [self radius] + [other radius];//7NSLog (@"radius length%f", radiussum); returnDistance <radiussum;}//determine if overlapping+ (BOOL) isInteractBetweenCircle1: (circle *) C1 andCircle2: (circle *) c2{return[C1 isinteractbetweencircle:c2];} @endintmain () {//all objects have * /*point2d *p1 = [point2d new]; [P1 setx:10 andy:15]; point2d *p2 = [point2d new]; [P2 setx:10 andy:12]; Double D1 = [p1 distancewithother:p2]; Double D1 = [point2d Distancewithother1:p1 andpoint2:p2]; NSLog (@ "%f", d1); */ //C1Circle *C1 = [circleNew]; [C1 setradius:5]; POINT2D*P1 = [point2dNew]; [P1 setX:TenAndY: the]; [C1 setpoint:p1]; [[C1 point] setX: the]; //C1 5 (15,15)//C2Circle *C2 = [circleNew]; [C2 setradius:2]; POINT2D*P2 = [point2dNew]; [P2 setX: aAndY: +]; //Set Center point[C2 setpoint:p2]; //C2 2 (12,19)BOOL B1 =[C1 isinteractbetweencircle:c2]; NSLog (@"%d", b1); if(b1) {NSLog (@"overlap"); }ElseNSLog (@"do not overlap"); return 0;}</pre>Determine if two circles overlap in iOS

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