--moving circles based on waves
--khol feb 2025
function _init()
	pal({[0]=0,2,136,8,137,9,10,138,11,139,12,140,1,129,130,7},1)
	valid_colors={} for i=1,14 do add(valid_colors,i) end
	camera(-63,-64)
	--controls-----------------
	text=false -- z button
	---------------------------
	col_mode=false -- fun colors
	speed=-0.005
	size=30    -- circle size
	scale=30   -- from center
	num_objects = 6
	---------------------------
	objects = {}

	for i=1,num_objects do

		if col_mode do
			temp_col = (valid_colors[(i-1)% #valid_colors +1])
		else
			temp_col = 15
		end

		local obj= {
			angle = (i-1)*(1/num_objects),
			speed = speed,
			col = temp_col
			}
			add(objects, obj)
	end
end

function _draw()
	cls()
	for obj in all(objects) do
		local x = 0 + cos(obj.angle)*scale
		local y = 0 + sin(obj.angle)*scale
		circ(x,y,size,obj.col)
		if text do
			local tx = 0 + cos(obj.angle)*(scale+15)
			local ty = 0 + sin(obj.angle)*(scale+15)
			print(obj.col,tx,ty)
		end
	end
end

function _update()
	for obj in all(objects) do
		obj.angle = obj.angle + obj.speed
	end

	if (btnp(4)) do
		text = not text
	end

end

function rotate_point(px,py,ox,oy,angle)
	local cos_a = cos(angle)
	local sin_a = sin(angle)
	local dx = px-ox
	local dy = py-oy
	local nx = ox + cos_a*dx - sin_a*dy
	local ny = oy + sin_a*dx + cos_a*dy
	return nx,ny
end