How do I draw a rotated line?

[Tag365]

How do I make it draw a rotated line?

-- For Custom Objects
function ObjRes.Custom(CorTab, X, Y, Size, RotRad, Mat, k)
if not Size then Size = 32 end
local Line, filltriangle = draw.line, draw.filltriangle
local Col
if type(Mat) == "table" then
Col = Mat
else
Col = ObjMaterials[Mat] or draw.brown
end
--setmetatable(Col, Col255MT) -- use
local Col2 = ObjMaterialsBorders[Mat] or draw.black
--print("Size: "..tostring(Size), "k: "..tostring(k))
for k, v in ipairs(CorTab) do
local FCor = CorTab[k-1] or CorTab[#CorTab]
local SCor = CorTab[k]
local TCor = CorTab[k+1] or CorTab[1]
filltriangle((FCor[1]*Size)+X, (FCor[2]*Size)+Y, (SCor[1]*Size)+X, (SCor[2]*Size)+Y, (TCor[1]*Size)+X, (TCor[2]*Size)+Y, Col)
Line((FCor[1]*Size)+X, (FCor[2]*Size)+Y, (SCor[1]*Size)+X, (SCor[2]*Size)+Y, angle, Col2) -- this is the line i need to be drawn rotated
end
end

[Dark Vortex]

This rotates squares so I'm guess you can take code from this and rotate a line

draw.setscreen(1)
draw.settitle("Rotating square")

function DS(x,y,a,b,d,C,g,m)
--rotate 90*d clockwise
D = a-x
D = math.floor(D*d)
-- if in group move together
if g == 1 then
y = y + (D*m)
b = b + (D*m)
elseif g == 2 then
x = x - (D*m)
a = a - (D*m)
elseif g == 3 then
x = x + (D*m)
a = a + D*m
elseif g == 4 then
y = y - (D*m)
b = b - (D*m)
elseif g == 5 then
x = x - D
a = a - D
y = y + D
b = b + D
elseif g == 6 then
x = x - D
a = a - D
y = y - D
b = b - D
elseif g == 7 then
x = x + D
a = a + D
y = y + D
b = b + D
elseif g == 8 then
x = x + D
a = a + D
y = y - D
b = b - D
end
--draw
draw.line(a-D,y,x,y+D,C)
draw.line(x,y+D,x+D,b,C)
draw.line(x+D,b,a,b-D,C)
draw.line(a,b-D,a-D,y,C)
end

function rotate( x,y,e,f,r,C,g,m)
ga,gb,gc,gd,ge,gf,gg,gh,gi = 0
for i = 0, 400 do
r = r + .01
if r > .99 then
r = 0
end
if g == 1 then
ga,gb,gc,gd = 1,2,3,4
elseif g == 2 then
ga,gb,gc = 1,7,2
gd,ge,gf = 5,0,8
gg,gh,gi = 3,6,4
end
draw.beginframe()
if m == 1 then
l = 0
DS(x,y,e,f,r,C,g,l)
elseif m == 2 then
l = 1
g = e-x
g = g/2
h = f-y
h = h/2
a = x + g
b = y + h
DS(x,y,a,b,r,C,ga,l)
DS(x,b,a,f,r,C,gc,l)
DS(a,y,e,b,r,C,gb,l)
DS(a,b,e,f,r,C,gd,l)
elseif m == 3 then
l = 2
g = e-x
g = g/3
h = f-y
h = h/3
a = x + g
b = y + h
c = x + g + g
d = y + h + h
DS(x,y,a,b,r,C,ga,l)
DS(x,b,a,d,r,C,gb,l)
DS(x,d,a,f,r,C,gg,l)
DS(a,y,c,b,r,C,gd,l)
DS(a,b,c,d,r,C,ge,l)
DS(a,d,c,f,r,C,gf,l)
DS(c,y,e,b,r,C,gc,l)
DS(c,b,e,d,r,C,gh,l)
DS(c,d,e,f,r,C,gi,l)
end
draw.endframe()
sleep(10)
draw.clear()
end
end

-- examples

function set()
draw.stringsize(40)
--draw.setfont()
a,b,c,d = 75,150,225,300
r = 0
m = 175
C = draw.red
B = draw.black
S = draw.lightgray
end
set()
q = .36
draw.beginframe()
DS(b,b,c,c,q,C,1,1)
DS(b,b,c,c,q,C,2,1)
DS(b,b,c,c,q,C,3,1)
DS(b,b,c,c,q,C,4,1)
DS(b,b,c,c,q,C,5,1)
DS(b,b,c,c,q,C,6,1)
DS(b,b,c,c,q,C,7,1)
DS(b,b,c,c,q,C,8,1)
draw.endframe()
sleep(50000)

Or you could take a line and insert the line's x, y and length
Into a function then it would move the line based on a circle around half the length to rotate the circle

[Atom]

I didn't use your code but I created a function that draws a rotated line based on center coordinates, radius, angle and color.


-- Center coordinates, radius, angle (radians), color
function rotatedLine(cx, cy, radius, angle, color)
  local x = cx + math.cos(angle)*radius
  local y = cy + math.sin(angle)*radius
  draw.line(cx, cy, x, y, color)
end

-- EXAMPLE
draw.setscreen(1) draw.setlinestyle(4, 'round')
a, sw, sh = 0, draw.getport() -- Get screen size
while true do
  sleep(20) draw.clear()
  rotatedLine(sw/2, sh/2, 120, a, draw.black)
  a = a + 0.01 -- Increase line angle
end