Questionable-Oerbital-Mechanics/src/calc.lua

calc = {}


-- G-Constant
calc.G = 6.67e-11 -- TWEAKABLE FOR LATER DEPENDING ON SCALE!!!!!!!!!!!
calc.pi = 3.14
-- Development debugging/logging thing
function calc.debug(text)
	if calc.isDebug then
		local cDev = clr.fg.RED
		local cText = clr.fg.YELLOW
		local cReset = clr.reset
		print(cDev.."DEV: "..cText..text..cReset)
	end
end

-- 0-255 colour to 0-1 colour (returns a table)
function calc.colour(r, g, b)
	return { r/255, g/255, b/255 }
end

-- 0-255 colour value to 0-1 colour value
function calc.c(value)
	return value/255
end

-- Distance Formula:
function calc.distance(x1, y1, x2, y2)
	return math.sqrt( (x2 - x1)^2 + (y2 - y1)^2 )
end

-- Calculates the gravitational pull between two objects:
function calc.gPull(obj1, obj2)
	local dist = calc.distance(obj1.x, obj1.y, obj2.x, obj2.y)
	local grav = calc.G * (obj1.m * obj2.m) / dist^2
	return grav
end


return calc