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Camera: More intuitive functions names

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This commit is contained in:
Matthias Richter 2011-11-16 13:45:20 +01:00
parent 31760b00c7
commit cd3df0c49f
1 changed files with 17 additions and 12 deletions
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29
camera.lua
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@ -39,14 +39,16 @@ end
function camera:rotate(phi)
self.rot = self.rot + phi
return self
end
function camera:translate(t)
self.pos = self.pos + t
function camera:move(p,q)
p = type(p) == "number" and vector(p,q) or p
self.pos = self.pos + p
return self
end
camera.move = camera.translate
function camera:predraw()
function camera:attach()
local center = vector(love.graphics.getWidth(), love.graphics.getHeight()) / (self.zoom * 2)
love.graphics.push()
love.graphics.scale(self.zoom)
@ -55,30 +57,33 @@ function camera:predraw()
love.graphics.translate((-self.pos):unpack())
end
function camera:postdraw()
function camera:detach()
love.graphics.pop()
end
function camera:draw(func)
self:predraw()
self:attach()
func()
self:postdraw()
self:detach()
end
function camera:toCameraCoords(p)
function camera:cameraCoords(p, q)
p = type(p) == "number" and vector(p,q) or p
local w,h = love.graphics.getWidth(), love.graphics.getHeight()
local p = (p - self.pos):rotate_inplace(self.rot)
p = (p - self.pos):rotate_inplace(self.rot)
return vector(p.x * self.zoom + w/2, p.y * self.zoom + h/2)
end
function camera:toWorldCoords(p)
function camera:worldCoords(p, q)
p = type(p) == "number" and vector(p,q) or p
local w,h = love.graphics.getWidth(), love.graphics.getHeight()
local p = vector((p.x-w/2) / self.zoom, (p.y-h/2) / self.zoom):rotate_inplace(-self.rot)
p = vector((p.x-w/2) / self.zoom, (p.y-h/2) / self.zoom):rotate_inplace(-self.rot)
return p + self.pos
end
function camera:mousepos()
return self:toWorldCoords(vector(love.mouse.getPosition()))
return self:worldCoords(vector(love.mouse.getPosition()))
end
-- the module