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Teggles
Joined: 16 Jan 2006
Posts: 27
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 Posted: Mon Jan 16, 2006 9:35 am Post subject: Drawing circles |
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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! |
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soulphalanx
Joined: 22 Aug 2005
Posts: 35
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| Posted: Mon Jan 16, 2006 10:42 am Post subject: |
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| Code: |
function drawCirc( x, y, radius, color)
theta = 0
while theta<=360 do
screen:drawLine((math.sin( theta)*radius)+x, (math.cos(theta)*radius)+ y, (math.sin(theta+1)*radius )+x, (math.cos(theta+1)*radius )+y, color)
theta = theta+1
end
end
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Teggles
Joined: 16 Jan 2006
Posts: 27
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| Posted: Mon Jan 16, 2006 1:05 pm Post subject: |
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| 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. |
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KawaGeo
Joined: 27 Aug 2005
Posts: 191
Location: Calif Mountains
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| Posted: Mon Jan 16, 2006 1:53 pm Post subject: |
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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.
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Geo Massar
Retired Engineer |
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Jim
Joined: 02 Jul 2005
Posts: 487
Location: Sydney
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| Posted: Mon Jan 16, 2006 4:04 pm Post subject: |
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something like (pseudo code, I don't do lua yet)
| Code: |
for q = -r to r
w=sqrt(r^2 - y^2)
line x-w,y+q to x+w,y+q
next
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Jim
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http://www.dbfinteractive.com |
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LuMo
Joined: 21 Aug 2005
Posts: 410
Location: Austria
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| Posted: Mon Jan 16, 2006 11:19 pm Post subject: |
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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
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"Good artists copy, great artists steal."
Pablo Picasso
go2lumo.com |
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joreofiorio35
Joined: 03 Dec 2005
Posts: 6
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| Posted: Tue Jan 17, 2006 1:55 am Post subject: |
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Heres one I just coded:
| Code: |
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:drawLine((math.sin(theta)*radius)+x, (math.cos(theta)*radius)+ y, (math.sin(theta+1)*radius)+x, (math.cos(theta+1)*radius)+y, fillcolor)
theta = theta+1
end
theta = 0
end
end
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The syntax is simple:
| Code: |
drawCirc (x position, y position, radius size, outline color, fill color)
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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). |
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Teggles
Joined: 16 Jan 2006
Posts: 27
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| Posted: Tue Jan 17, 2006 11:35 am Post subject: |
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| Hey, I haven't tried it, but I'm assuming it'll work well. Thanks! |
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youresam
Joined: 06 Nov 2005
Posts: 87
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| Posted: Wed Jan 18, 2006 8:22 am Post subject: |
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| Jim wrote: | something like (pseudo code, I don't do lua yet)
| Code: |
for q = -r to r
w=sqrt(r^2 - y^2)
line x-w,y+q to x+w,y+q
next
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Jim |
In LUA, it uses commands more like C:
| Code: |
for q = -r , r
w=sqrt(r^2 - y^2)
screen:drawLine(x-w,y+q,x+w,y+q)
end
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