diff options
Diffstat (limited to 'client/camera.lua')
| -rw-r--r-- | client/camera.lua | 23 |
1 files changed, 15 insertions, 8 deletions
diff --git a/client/camera.lua b/client/camera.lua index bb1d8a6..d4d7901 100644 --- a/client/camera.lua +++ b/client/camera.lua @@ -2,7 +2,6 @@ local coords = require"common.coords" local class = require"common.class" -- in screen units -local screen_width, screen_height = love.graphics.getDimensions() -- zoom is screen pixels per world unit local Camera = class() @@ -11,28 +10,36 @@ function Camera.make(cls,pos,zoom) zoom = zoom or 30 return setmetatable({pos=pos,zoom=zoom},cls) end +local function screen_offset() + -- in screen units, not in world units ! + local W,H = love.graphics.getDimensions() + return coords.Pos:make(W/2,H/2) +end function Camera.apply_trans(self) - -- love.graphics.origin() + local so = screen_offset() + -- centre (0,0) in the middle of the screen - love.graphics.translate(screen_width/2,screen_height/2) - -- apply camera transformations + love.graphics.translate(so.x,so.y) + -- apply camera transformations love.graphics.scale(self.zoom) love.graphics.translate(-self.pos.x,-self.pos.y) end -local screen_offset = coords.Pos:make(screen_width/2,screen_height/2) function Camera.screen_to_world(self,pos) - return (pos-screen_offset)/self.zoom + self.pos + local so = screen_offset() + return (pos-so)/self.zoom + self.pos end function Camera.world_to_screen(self,pos) - return (pos-self.pos) * self.zoom + screen_offset + local so = screen_offset() + return (pos-self.pos) * self.zoom + so end function Camera.extents(self) + local W,H = love.graphics.getDimensions() -- returns top left and bottom right pos's in world coords return self:screen_to_world(coords.Pos:make(0,0)), - self:screen_to_world(coords.Pos:make(screen_width,screen_height)) + self:screen_to_world(coords.Pos:make(W,H)) end |