PChase (of PolyPath)

class PChase

Defined in PChase.sc.

A motion class that is used to make an Actor get within a certain distance of another (possibly moving) object, while avoiding polygon obstacles.

PChase is generally used as an argument for setMotion:

; Make the peasant approach the merchant, within 20 pixels.
(peasant setMotion: PChase theMerchant 20)
class diagram

Properties

Inherited from PolyPath:

Property Description
client  
caller  
x  
y  
dx  
dy  
b-moveCnt  
b-i1  
b-i2  
b-di  
b-xAxis  
b-incr  
completed  
xLast  
yLast  
value  
points  
finalX  
finalY  
obstacles  
name  

Defined in PChase:

Property Description
who  
distance  
targetX  
targetY  

Methods

init(theClient theWho [theDistance theCaller theObstacles])

Initializes the PFollow instance.

Parameters:
  • theClient (heapPtr) – The Actor to which this is attached.
  • theWho (heapPtr) – The target to follow.
  • theDistance (number) – How close the client needs to get from the target.
  • theCaller (heapPtr) – The object on which cue() will be called when the target is reached.
  • theObstacles (heapPtr) – Optional list of polygon obstacles. If not provided, the room’s obstacles are used.
doit()
moveDone()