pico-8 cartridge // http://www.pico-8.com version 42 __lua__ local player = { -- position x = 67, y = 50, -- velocity dx = 0, dy = 0, update = function(self) -- apply gravity self.dy = self.dy + 1 -- cap the falling speed to 7px/frame self.dy = min(self.dy, 7) -- collision left if self.dx < 0 and (isColliding(self.x + self.dx, self.y) or isColliding(self.x + self.dx, self.y + 7)) then -- move the player against the left wall, if our x coord isn't already a multiple of 8 if self.x % 8 ~= 8 then self.x = flr(self.x / 8) * 8 end self.dx = 0 end -- collision right if self.dx > 0 and (isColliding(self.x + self.dx + 7, self.y) or isColliding(self.x + self.dx + 7, self.y + 7)) then -- move the player against the right wall if self.x % 8 ~= 0 then self.x = flr((self.x + 8) / 8) * 8 end self.dx = 0 end -- collision up if self.dy < 0 and (isColliding(self.x, self.y + self.dy) or isColliding(self.x + 7, self.y + self.dy)) then -- move the player right under the block if self.y % 8 ~= 0 then self.y = flr(self.y / 8) * 8 end self.dy = 0 end -- collision down if self.dy > 0 and (isColliding(self.x, self.y + self.dy + 7) or isColliding(self.x + 7, self.y + self.dy + 7)) then -- align the player with the nearest block down if self.y % 8 ~= 0 then self.y = flr((self.y + 8) / 8) * 8 end self.dy = 0 end -- diagonals if self.dx ~= 0 and self.dy ~= 0 and isCollidingRect(self.x + self.dx, self.y + self.dy) then self.dx = 0 self.dy = 0 -- align with the current cell self.x = flr(self.x / 8) * 8 self.y = flr(self.y / 8) * 8 end -- apply movement self.x = self.x + self.dx self.y = self.y + self.dy end, postUpdate = function(self) self.dx = 0 end } function isColliding(x, y) return fget(mget(flr(x / 8), flr(y / 8)), 0) end -- same as isColliding(), but will check the 4 corners at once function isCollidingRect(x, y) return isColliding(x, y) or isColliding(x + 7, y) or isColliding(x, y + 7) or isColliding(x + 7, y + 7) end function getBlockCoords(x, y) return flr(x / 8) * 8, flr(y / 8) * 8 end function _init() end function _update() --left if btn(0) then player.dx = -2 end -- right if btn(1) then player.dx = 2 end -- Up if btnp(2) then player.dy = -7 end player:update() player:postUpdate() end function _draw() cls() map() spr(2, player.x, player.y) end __gfx__ 000000001111111d9999999900000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 000000001111111d9999999900000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 007007001111111d9999999900000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 000770001111111d9999999900000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 000770001111111d9999999900000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 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