epervier-old/gamecore/modules/world/camera.lua

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-- camera.lua :: a basic camera adapted to the asset/world system.
-- Use hump.camera as the view backend.
--[[
Copyright © 2019 Kazhnuz
Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
the Software, and to permit persons to whom the Software is furnished to do so,
subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
]]
local cwd = (...):gsub('%.camera$', '') .. "."
local CameraSystem = Object:extend()
local View = require(cwd .. "libs.hump.camera")
local SPLITSCREEN_ISVERTICAL = false
-- INIT FUNCTIONS
-- Initialize the camera system
function CameraSystem:new(world)
self.scene = world.scene
self.world = world
self.verticalSplit = SPLITSCREEN_ISVERTICAL
self:initViews()
end
function CameraSystem:initViews()
self.views = {}
self.views.list = {}
self.views.width, self.views.height = core.screen:getDimensions()
end
-- INFO FUNCTIONS
-- Get informations from the camera system
function CameraSystem:getViewNumber()
return #self.views.list
end
function CameraSystem:haveView()
return (self:getViewNumber() == 0)
end
-- WRAPPER and UTILS
-- Access data from the views
function CameraSystem:addView(x, y)
local view = {}
view.cam = View(x, y, 1, 0, true)
-- TODO: add a target system in order to make a camera able
-- to target a specific object
table.insert(self.views.list, view)
end
function CameraSystem:getView(id)
return self.views.list[id]
end
function CameraSystem:getViewCam(id)
local view = self:getView(id)
return view.cam
end
function CameraSystem:attachView(id)
local cam = self:getViewCam(id)
cam:attach()
end
function CameraSystem:detachView(id)
local cam = self:getViewCam(id)
cam:detach()
end
return CameraSystem