Drawing 2d Rectangle keeps jumping to 0,0?

[Andy Gilbert]

HI, im drawing a couple of rectangles for a simple GUI.

 

They show "levels" of dynamic values withing the game.

 

Problem im having is i keep getting "lines" going from 0,0 (top left corner) to where the rectangle cooords are? They keep jumping from showing the rectangle correctly to then lines going to 0,0?

 

Ive checked my code but cant even see how they would goto 0,0 becasue the function to draw the rect is Xpos,Ypos,width,height and my Xpos and Y pos are static values which never change, along with width too. Only "height" changes.

 

--GUI
 SetColor(Vec4(0,1,0,0.6))
  DrawRect(GraphicsWidth()-50,GraphicsHeight()-100,10,roll*100)
 DrawRect(GraphicsWidth()-90,GraphicsHeight()-100,10,0-(roll*100))

 

Why would it be doing this?

 

Thanks

Andy

[Road Kill Kenny]

what is the value of roll usually?

 

And put a screenshot of it.

[Andy Gilbert]

HI, roll is just :

 

roll = Curve(KeyDown(KEY_LEFT) - KeyDown(KEY_RIGHT),roll,40)

 

Which when printed is long number generally below 1 like 0.0023345 (example)

 

Ive tried getting screent shots but it "flickers" from line to normal and everytime it never gets it, it isnt "all" the time, like once every 2 - 3 seconds?

 

Thanks

Andy

[Clackdor]

Convert roll to the closest int value and try.

[Road Kill Kenny]

Well not roll perse. You need to convert roll*100 to the nearest int... otherwise he'll only ever get 100 or 0.

[macklebee]

the DrawRect() doesnt appear to like width and height values less than 2 for whatever reason... granted a width or height value of 1 is essentially a line. so to get around it just do a simple check to determine that the value of the roll is greater than 0.02 and it should work fine...

if roll>0.02 or roll<-0.02 then
 DrawRect(gx-50,gy-100,10,roll*100)
 DrawRect(gx-90,gy-100,10,0-(roll*100))
end

[Paul Thomas]

if roll < 0.02 then roll = 0.02 end

 

Otherwise wouldn't it just disappear if roll was below 0.02?

[macklebee]

well i was assuming based on the code he provided that was what he was wanting... but yes if he wanted to keep at least some sort of rectangle shown then that would be the way to go

[Andy Gilbert]

Ok thanks, I'll implement that and see how it goes.

Thanks

Andy