Hi there.
1. Move both the arms and body as one entity
That's not that hard
You need to create different variables for each body part you want to create. Here is how I would do it:
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self.body = {image = love.graphics.newImage("body.png"), x = self.x, y = self.y, ox = 0, oy = 0}
self.arms = {image = love.graphics.newImage("arms.png"), x = self.x, y = self.y, ox = 3, oy = 25}
self is the player object. the ox and oy is the offset from the base player position.
Then you need to update the positions for each body part:
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function Player:updateBody(dt)
-- Body --
self.body.x = self.x + self.body.ox
self.body.y = self.y + self.body.oy
-- Arms --
self.arms.x = self.x + self.arms.ox
self.arms.y = self.y + self.arms.oy
end
This is to keep the parts fixed to the player position all the time.
2. Pivot the arms so they look like they're attached
Here you can use math.atan2. This can be added to the updateBody function :
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local mx, my = love.mouse.getPosition()
self.arms.rotation = math.atan2(self.arms.y - my, self.arms.x - mx)
And draw that stuff:
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love.graphics.draw(self.body.image, self.body.x, self.body.y)
love.graphics.draw(self.arms.image, self.arms.x, self.arms.y, self.arms.rotation, -1, -1, 0, self.arms.height/2)
Now the angle should match. You may need to flip the arm image to the right direction by setting the x and y scale to a negative value.
Here is a test application for you to look how I set this up. You can ignore the other methods and variables(this is just a template).
EntityLimb.love
Hope that helps.
