Turning an image

[LuaWeaver]

Would this work?

Code: Select all

deg=math.pi/180
function love.draw()
love.graphics.draw(..., 20, 20, deg*val) --Val is the number of degrees
end

Or maybe this?

Code: Select all

function math.rtd(degree) --rtd=radians to degrees
return math.pi/180/degree
end

Because math.pi/180==1 degree, and multiplying 1 by degree gives 1 degree times value, giving the degrees instead of radians?

[Jasoco]

Wouldn't these work:

math.rad()
math.deg()

?

[Robin]

Wouldn't these work:

math.rad()
math.deg()

?

Yes. math.rad() is the one LuaWeaver needs.

[TheKraigose]

I actually had to do this the other day for an overhead shooter I'm developing. My method is not the fastest, but it works for what I need to do.

I convert the radians to degrees, perform my calculations, then convert it back to radians using the corresponding math.* functions.

It's easier and seems to be pretty fast considering all the calculations being done:

Code: Select all

        -- Rotation code for turning right and left
	if love.keyboard.isDown("right") then
		hero.rot = math.deg(hero.rot)
		hero.rot = hero.rot + rotSpeed
		if hero.rot >= 360 then
			hero.rot = 0
		end
		hero.rot = math.rad(hero.rot)
	elseif love.keyboard.isDown("left") then
		hero.rot = math.deg(hero.rot)
		hero.rot = hero.rot - rotSpeed
		if hero.rot <= -1 then
			hero.rot = 359
		end
		hero.rot = math.rad(hero.rot)
	end

This is because I'm used to another engine which uses degrees, not radians, but the engine I was using was far less accessible than Love2D is.