Created
April 7, 2016 16:20
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function init() | |
setName("Ngon") | |
setDesc("Generates a regular polygon") | |
setSize(100, 24+64+8+8+18+7+4) | |
addOutput(24+32) | |
addParameter("Sides", "Side Count", 24+64+8+8, 3, 3, 10) | |
addParameter("Angle", "Rotation of Polygon", 24+64+8+8+18, 0, 0, 360) | |
end | |
function apply() | |
tileSize = getTileSize() | |
radius = tileSize/2 | |
sides = getValue(0,0,0,1) | |
rotation = getValue(1,0,0,1) | |
for tx=0, tileSize-1 do | |
for ty=0, tileSize-1 do | |
inPoly = false | |
x = tx+0.5-radius | |
y = ty+0.5-radius | |
j = sides-1 | |
for i=0, sides-1 do | |
ir = i/sides * math.pi*2 + math.rad(rotation) | |
jr = j/sides * math.pi*2 + math.rad(rotation) | |
vi = { | |
x=math.sin(ir)*radius, | |
y=math.cos(ir)*radius, | |
} | |
vj = { | |
x=math.sin(jr)*radius, | |
y=math.cos(jr)*radius, | |
} | |
if ((vi.y >= y) ~= (vj.y > y)) and (x <= (vj.x - vi.x) * (y - vi.y) / (vj.y - vi.y) + vi.x) then | |
inPoly = not inPoly | |
end | |
j = i | |
end | |
if inPoly then | |
setPixel(0,tx,ty,1,1,1) | |
else | |
setPixel(0,tx,ty,0,0,0) | |
end | |
end | |
end | |
end |
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