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Issue 9: Add camera:zoom[To]()

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Matthias Richter 2012-11-01 18:49:15 +01:00
parent 9b6aba60dd
commit bf862c9b40
1 changed files with 27 additions and 17 deletions
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44
camera.lua
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@ -34,17 +34,7 @@ local function new(x,y, zoom, rot)
x,y = x or love.graphics.getWidth()/2, y or love.graphics.getHeight()/2
zoom = zoom or 1
rot = rot or 0
return setmetatable({x = x, y = y, zoom = zoom, rot = rot}, camera)
end
function camera:rotate(phi)
self.rot = self.rot + phi
return self
end
function camera:rotation(phi)
if phi then self.rot = phi end
return self.rot
return setmetatable({x = x, y = y, scale = zoom, rot = rot}, camera)
end
function camera:lookAt(x,y)
@ -61,10 +51,30 @@ function camera:pos()
return self.x, self.y
end
function camera:rotate(phi)
self.rot = self.rot + phi
return self
end
function camera:rotateTo(phi)
self.rot = phi
return self
end
function camera:zoom(mul)
self.scale = self.scale * mul
return self
end
function camera:zoomTo(zoom)
self.scale = zoom
return self
end
function camera:attach()
local cx,cy = love.graphics.getWidth()/(2*self.zoom), love.graphics.getHeight()/(2*self.zoom)
local cx,cy = love.graphics.getWidth()/(2*self.scale), love.graphics.getHeight()/(2*self.scale)
love.graphics.push()
love.graphics.scale(self.zoom)
love.graphics.scale(self.scale)
love.graphics.translate(cx, cy)
love.graphics.rotate(self.rot)
love.graphics.translate(-self.x, -self.y)
@ -81,19 +91,19 @@ function camera:draw(func)
end
function camera:cameraCoords(x,y)
-- x,y = ((x,y) - (self.x, self.y)):rotated(self.rot) * self.zoom + center
-- x,y = ((x,y) - (self.x, self.y)):rotated(self.rot) * self.scale + center
local w,h = love.graphics.getWidth(), love.graphics.getHeight()
local c,s = cos(self.rot), sin(self.rot)
x,y = x - self.x, y - self.y
x,y = c*x - s*y, s*x + c*y
return x*self.zoom + w/2, y*self.zoom + h/2
return x*self.scale + w/2, y*self.scale + h/2
end
function camera:worldCoords(x,y)
-- x,y = (((x,y) - center) / self.zoom):rotated(-self.rot) + (self.x,self.y)
-- x,y = (((x,y) - center) / self.scale):rotated(-self.rot) + (self.x,self.y)
local w,h = love.graphics.getWidth(), love.graphics.getHeight()
local c,s = cos(-self.rot), sin(-self.rot)
x,y = (x - w/2) / self.zoom, (y - h/2) / self.zoom
x,y = (x - w/2) / self.scale, (y - h/2) / self.scale
x,y = c*x - s*y, s*x + c*y
return x+self.x, y+self.y
end