/zoeplat

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Viewing changes to main.lua

  • Committer: Josh C
  • Date: 2013-03-09 04:58:45 UTC
  • Revision ID: josh@9ix.org-20130309045845-wdcov53ghv2h6iwf
apply acceleration to velocity, THEN apply velocity to position (then do 
collision).  important for detecting correct velocity

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main.lua
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require 'zoetrope'
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TERM_VEL = 400
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Player = Tile:extend {
 
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Player = Animation:extend {
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   image = 'data/player.png',
 
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   height = 32,
 
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   width = 32,
 
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   sequences = {
 
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      stand = { frames = { 1 }, fps = 1 },
 
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      walk = { frames = { 2, 3 }, fps = 5 },
 
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      jump = { frames = { 4 }, fps = 1 }
 
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   },
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   onNew = function (self)
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              self.velocity.y = 0
 
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              self.maxVelocity.y = 400
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           end,
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   onUpdate = function (self)
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                 self.velocity.x = 0
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                 if self.velocity.y >= TERM_VEL then
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                    self.velocity.y = TERM_VEL
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                    self.acceleration.y = 0
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                 else
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                    self.acceleration.y = 800
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                 end
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                 if the.keys:pressed('left') then
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                    self.velocity.x = -200
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                 elseif the.keys:pressed('right') then
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                    self.velocity.x = 200
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                 end
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                 if the.keys:justPressed('up') then
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                    self.velocity.y = -400
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                 end
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              end
 
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   onStartFrame = function (self)
 
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                     -- this is all in startframe so it happens before
 
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                     -- physics calc at beginning of update
 
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                     self.velocity.x = 0
 
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                     self.acceleration.y = 800
 
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                     if the.keys:pressed('left') then
 
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                        self.velocity.x = -200
 
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                        self:play('walk')
 
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                     elseif the.keys:pressed('right') then
 
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                        self.velocity.x = 200
 
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                        self:play('walk')
 
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                     else
 
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                        self:play('stand')
 
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                     end
 
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                     if the.keys:justPressed('up') then
 
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                        self.velocity.y = -400
 
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                     end
 
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                  end,
 
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   onCollide = function (self, other, xOverlap, yOverlap)
 
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                  -- seriously, why does this even fire?
 
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                  if other == the.view.map then return end
 
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                  --print(string.format('col s{x=%i y=%i w=%i h=%i} %s', self.x, self.y, self.width, self.height, tostring(other)))
 
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                  --print('vel.x:'..self.velocity.x.." vel.y:"..self.velocity.y)
 
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                  -- assumption: any other collision is with a solid map tile
 
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                  if yOverlap > xOverlap then
 
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                     other:displace(self)
 
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                  elseif xOverlap > yOverlap then
 
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                     -- check if we've moved since collisions were generated
 
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                     local xov, yov = self:overlap(other.x, other.y,
 
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                                                   other.width, other.height)
 
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                     if xov ~= 0 and yov ~= 0 then
 
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                        self.velocity.y = 0
 
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                        other:displace(self)
 
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                     end
 
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                  else
 
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                     print('??')
 
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                  end
 
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               end
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}
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GameView = View:extend {
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              self.focus = the.player
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              self:clampTo(self.map)
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           end,
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   onEndFrame = function (self, dt)
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                   self.map:subdisplace(the.player)
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                end
 
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   onUpdate = function (self)
 
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                 --print('tick')
 
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                 the.player:collide(self.map)
 
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                 --self.map:collide(the.player)
 
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              end
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}
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the.app = App:new {
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              self.view = GameView:new()
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           end,
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   onUpdate = function (self, dt)
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                 if the.keys:justPressed('escape') then
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                    love.event.quit()
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                 end
 
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                 -- apparently I can do this w/ C-A-q if DEBUG is on
 
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                 -- if the.keys:justPressed('escape') then
 
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                 --    love.event.quit()
 
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                 -- end
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              end
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}
 
 
b'\\ No newline at end of file'