Developing a pathfinding algorithm

One way to provide nodes with intelligence is to predefine their behavior in response to external stimuli, or to give them a goal to reach.

In this case, we are going to make our enemies follow a path, which we will subdivide into steps. For this purpose, let's create a new class by following these steps:

1. Right-click on the Classes group in the project navigator and select New File….

2. Click on iOS | cocos2d v3.x | CCNode class and make this class a subclass of CCNode.

3. Call it PathStep and click on Create.

Replace the contents of PathStep.h with the following lines:

#import <Foundation/Foundation.h>
#import "cocos2d.h"

@interface PathStep : CCNode {
    
}

// Property for the next step
@property (nonatomic, assign) PathStep *nextPathStep;
// Property for the sprite
@property (readwrite, nonatomic) CCSprite *pathStepSprite;

// Init method
- (PathStep *) initWithPosition:(CGPoint)position;

@end

We are extending the class from CCNode because we need it to...