gistfile1.txt

local cx = 200; // Center X
local cy = 200; // Center Y
local size = 100; // The radius
local spacing = 15; // The angle between each triangle

local count = 360 / spacing;

local points = {}

function rotate(px, py, ax, ay, angle)
  angle = angle * 0.0174532925;
  
  local s = math.sin(angle);
  local c = math.cos(angle);

  px = px-ax;
  py = py-ay;

  // rotate point
  local xnew = px * c - py * s;
  local ynew = px * s + py * c;

  return {xnew + ax, ynew + ay};
end

local other = true;
for i = 1, count do
	local angle = rotate(cx, cy - size, cx, cy, i * spacing);
	local nangle = rotate(cx, cy - size, cx, cy, (i + 1) * spacing);
  
	table.insert(points, { x = cx, y = cy } )
	
	if (other) then
		table.insert(points, { angle[1], angle[2] } );
		table.insert(points, { nangle[1], nangle[2] } );
	end
  
	other = !other;
end

hook.Add( "HUDPaint", "HUD Elements", function())
	surface.SetDrawColor( 255, 0, 0, 255 )
	draw.NoTexture()
	surface.DrawPoly( points )
end)