Strangeness!!!!

Why does this not work? Basically it should chnage the background colour smoothly. It does it once but then when the counter is reset to 0 it doesn't work! EH?????

Graphics3D 800,600,32,2
SeedRnd MilliSecs

camera = CreateCamera()
light=CreateLight()

old_r%=Rnd(0, 255)
old_g%=Rnd(0, 255)
old_b%=Rnd(0, 255)
r = Rnd(50, 255)
g = Rnd(50, 255)
b = Rnd(50, 255)

CameraClsColor camera, old_r,old_g,old_b

Global counter=0

While Not KeyDown( 28 )

counter=counter + 1

If counter > 100
r=Rnd(50, 255)
g=Rnd(50, 255)
b=Rnd(50, 255)
EndIf

If r < old_r
old_r = old_r - 1
ElseIf r > old_r
old_r = old_r + 1
EndIf

If g < old_g
old_g = old_g - 1
ElseIf g > old_g
old_g = old_g + 1
EndIf

If b < old_b
old_b = old_b - 1
ElseIf b > old_b
old_b = old_b + 1
EndIf

If r = old_r
counter = 0
EndIf

CameraClsColor camera, old_r, old_g, old_b

UpdateWorld
RenderWorld

Text 1,1,"counter:" + counter + " old_r:" + old_r + " r:" + r + " old_g:" + old_g + " g:" + g + " old_b:" + old_b + " b:" + b

Flip
Wend

You need to give old_r, old_g and old_b new values once u've faded to the new color... otherwise r will stay equal to old_r and keep resetting the counter to 0.

Actually that wasn't the only problem.. I modified the code some to make it work right:

Graphics3D 800,600,32,2 
SeedRnd MilliSecs 

camera = CreateCamera() 
light = CreateLight() 

old_r = Rnd(0, 255) 
old_g = Rnd(0, 255) 
old_b = Rnd(0, 255) 
r = Rnd(50, 255) 
g = Rnd(50, 255) 
b = Rnd(50, 255) 

CameraClsColor camera, old_r, old_g, old_b 

Global counter=0 

While Not KeyDown( 28 ) 

If r < old_r 
	r = r + 1 
ElseIf r > old_r 
	r = r - 1 
Else
	counter = counter + 1
EndIf 

If g < old_g 
	g = g + 1 
ElseIf g > old_g 
	g = g - 1 
Else
	counter = counter + 1
EndIf 

If b < old_b 
	b = b + 1 
ElseIf b > old_b 
	b = b - 1 
Else
	counter = counter + 1
EndIf 

If counter = 3
	counter = 0 
	old_r=Rnd(50, 255) 
	old_g=Rnd(50, 255) 
	old_b=Rnd(50, 255) 
EndIf 

CameraClsColor camera, r, g, b 

UpdateWorld 
RenderWorld 

Text 1,1,"counter:" + counter + " old_r:" + old_r + " r:" + r + " old_g:" + old_g + " g:" + g + " old_b:" + old_b + " b:" + b 

Flip 
Wend

this works fine until r= 211, g = 200 and b = 51. then it stops.

Ran it several times, but it keeps stopping at those esact colours

Yeah I think "counter = 3" should be changed to "counter > 500". Works here now.

Oops, I think I left my brain somewhere other than my head yesterday :S. Here's how to do it in a way that works correctly:

Graphics3D 800,600,32,2 
SeedRnd MilliSecs 

camera = CreateCamera() 
light = CreateLight() 

old_r = Rnd(0, 255) 
old_g = Rnd(0, 255) 
old_b = Rnd(0, 255) 
r = Rnd(50, 255) 
g = Rnd(50, 255) 
b = Rnd(50, 255) 

CameraClsColor camera, old_r, old_g, old_b 

While Not KeyDown( 28 ) 

If r < old_r 
	r = r + 1 
ElseIf r > old_r 
	r = r - 1 
Else
	rDone = True
EndIf 

If g < old_g 
	g = g + 1 
ElseIf g > old_g 
	g = g - 1 
Else
	gDone = True
EndIf 

If b < old_b 
	b = b + 1 
ElseIf b > old_b 
	b = b - 1 
Else
	bDone = True
EndIf 

If rDone = True And gDone = True And bDone = True
	rDone = False
	gDone = False
	bDone = False
	old_r=Rnd(50, 255) 
	old_g=Rnd(50, 255) 
	old_b=Rnd(50, 255) 
EndIf 

CameraClsColor camera, r, g, b 

UpdateWorld 
RenderWorld 

Text 1,1,"old_r:" + old_r + " r:" + r + " old_g:" + old_g + " g:" + g + " old_b:" + old_b + " b:" + b 

Flip 
Wend

Of course, the best way would be to only check the Red colour and then just set the Green and Blue colours based on the Red colour using an Interpolate() function. That way all 3 values will reach the target colour at the same time.

Of course it would be better still to initialise r_done, g_done and b_done to false at the start! Have you found your brain yet ;-)

It's not really necessary to initialise the variables in such a simple app :P