Topic: version 4 MAXScript New Features/Reactors
The Reactor controller is a procedural controller that reacts to changes in any other controller within the software. Reactor comes in five different forms: Position Reactor, Rotation Reactor, Point3 Reactor, Scale Reactor, and Float Reactor. Any animatable parameter in the software can react to changes in any other animatable parameter. Reactor is not based on time, but is based on other variables in your scene.
Example:
-- Setup a scene
ball = sphere name:"ball" pos:[-40,0,50] radius:10
ball.pos.controller = position_XYZ()
-- create some keys
key = addNewKey ball.pos.Zposition.controller 0
key.outTangentType = #slow
key.value = 50
key = addNewKey ball.pos.Xposition.controller 0
key.value = -40
key = addNewKey ball.pos.Zposition.controller 25
key.InTangentType = #fast
key.outTangentType = #fast
key.value = 4
key = addNewKey ball.pos.Xposition.controller 25
key.value = -10
key = addNewKey ball.pos.Zposition.controller 50
key.InTangentType = #slow
key.value = 50
key = addNewKey ball.pos.Xposition.controller 50
key.value = 20
ball.showtrajectory = true
-- assign a reactor controller to the scale of the ball
reactor = Scale_Reactor()
ball.scale.controller = reactor
-- Pick the react to object, and create reactions
reactor.reactions.reactTo ball.pos.ZPosition.controller 0
reactor.reactions.setName 0 "UnSquashed"
reactor.reactions.setVectorState 0 [1,1,1]
reactor.reactions.create "squashed" 25
reactor.reactions.setVectorState 1 [2.5,2.5,.4]
reactor.reactions.setValueAsFloat 0 10
reactor.reactions.setInfluence 0 6
reactor.reactions.setInfluence 1 5.5
reactor.reactions.setStrength 1 1.5
reactor.reactions.setFalloff 0 1.75
ss = StringStream ""
reactor.reactions.getType()
ct = reactor.reactions.getCount()
format "Reactor Statistics: \n------------------------------\n \n" to:ss
format "Count : %\n" ct to:ss
format "\n" to:ss
for i = 0 to ct-1 do
(
format "Reaction #: % \n------------------------------------------------
Name : %
State : %
Value : %
Strength : %
Influence : %
Falloff : % \n\n" (i) (reactor.reactions.getName i)
(getReactionState reactor (i+1)) (getReactionValue reactor (i+1))
(reactor.reactions.getStrength i) (reactor.reactions.getInfluence i )
(reactor.reactions.getFalloff i ) to:ss
)
print ss
See also