Drawing circles

[Teggles]

Does anyone have a function that can draw circles in Lua? [ka] gave me one, but it does not have the ability to choose a fill color. I need a fill color.

Thanks!

[soulphalanx]

Code: Select all

function drawCirc( x, y, radius, color)

	theta = 0

	while theta<=360 do
		screen&#58;drawLine&#40;&#40;math.sin&#40;  theta&#41;*radius&#41;+x, &#40;math.cos&#40;theta&#41;*radius&#41;+  y, &#40;math.sin&#40;theta+1&#41;*radius  &#41;+x, &#40;math.cos&#40;theta+1&#41;*radius  &#41;+y, color&#41;
		theta = theta+1
	end
end

[Teggles]

Not to be rude, but did you even read my post? I said that it needs to be able to fill the circle. That does not fill the circle.

[KawaGeo]

Originally, Lua Player does not have a fill command for circles like we do have one for rectangles.

Shine's team is working on implementation of PSPGL (similar to OpenGL) toward Lua Player.

[Jim]

something like (pseudo code, I don't do lua yet)

Code: Select all

for q = -r to r
w=sqrt(r^2 - y^2)
line x-w,y+q to x+w,y+q
next

Jim

[LuMo]

i was on coding non rectangular figures and filling support but dropped it;
cause i was not fast enough to follow the changes of every luaplayer release

greets
lumo

[joreofiorio35]

Heres one I just coded:

Code: Select all

function drawCirc(x, y, radiusfill, color, fillcolor) 
   x=x+radiusfill
   y=y+radiusfill
   theta = 0 
   for radius = 1, radiusfill do
   	while theta<=360 do 
      		if radius == radiusfill then fillcolor = color end
		screen&#58;drawLine&#40;&#40;math.sin&#40;theta&#41;*radius&#41;+x, &#40;math.cos&#40;theta&#41;*radius&#41;+ y, &#40;math.sin&#40;theta+1&#41;*radius&#41;+x, &#40;math.cos&#40;theta+1&#41;*radius&#41;+y, fillcolor&#41; 
      		theta = theta+1 
   	end
   theta = 0 
   end
end 

The syntax is simple:

Code: Select all

drawCirc (x position, y position, radius size, outline color, fill color)

Also, I made this one so it places not the center of the circle at the input x and y position, but the upper-left hand corner.
Thanks,
Josh.

EDIT: The outline of the circle, If you choose to outline it with a different color, is quite large. I am unsure on how to make it smaller, because of my poor geometry skills, but I'll fool around with it later @ home (at school right now lol).

[Teggles]

Hey, I haven't tried it, but I'm assuming it'll work well. Thanks!

[youresam]

something like (pseudo code, I don't do lua yet)

Code: Select all

for q = -r to r
w=sqrt(r^2 - y^2)
line x-w,y+q to x+w,y+q
next

Jim

In LUA, it uses commands more like C:

Code: Select all

for q = -r , r
w=sqrt(r^2 - y^2)
screen:drawLine(x-w,y+q,x+w,y+q)
end