Any ideas?

Blitz3D Forums/Blitz3D Programming/Any ideas?

IPete2

(Posted 2005) [#1]

Hi,

I am using an analogue potentiometer as input via serial port into B3d.

The pot readings are as follows: 600 = fully left, 500 = middle, 400 fully right, and of course anywhere in-between.

I want to use the input to steer with momentum, so if I am going right (400) and I swing the pot to the left (600) I want the effect to seem to occur gradually as though the momentum is keeping me going right for a short while.

I have implemented an array and I am using an index to read from the array based on the potentiometer reading, but if I move right and then left ( but keep the reading right of centre i.e. greater than 500) the movement does not act accordingly.

Any thought on how to approach this please??

IPete2.

Tom	(Posted 2005) [#2]

Graphics3D 1024,768,32,2

cam=CreateCamera()
light=CreateLight()

PositionEntity cam,0,5,0
RotateEntity cam,90,0,0

mesh=CreateCube()
EntityFX mesh,1



angle#=0.0

While Not KeyDown(1)

	If KeyDown(205)
		angle=angle-.05
		If angle<-2 angle=-2
	End If
	
	If KeyDown(203)
		angle=angle+.05
		If angle>2 angle=2
	End If
	

	If angle<>0	TurnEntity mesh,0,angle,0

	;Damp angle
	If angle>0
		angle=angle-.005
		If angle<0 angle=0
	Else If angle<0
		angle=angle+.005
		If angle>0 angle=0
	End If
	
	UpdateWorld
	RenderWorld
	Flip
Wend
End

Any good?

big10p

(Posted 2005) [#3]

[edit] Ooops, forgot to include momentum on this. Try again:

Const POT_SCALE# = 1.0/100.0

pot_val# = (value read from pot)
		
; Convert pot reading to value in range -1(left) to 1(right).
pot_x# = 1.0 - ((pot_val#-400) * POT_SCALE)

move# = (move# * 0.99) + (speed# * pot_x#)
x# = x# + move#