Pro programmers - is this the way to do it?

Hi there pros!

I am in the first stage of my game and have started out with the control of movement and change of sprite sequences - depending on the direction the character is moving.

A touch on the screen makes the character fly, and a drag makes him move to that direction. And if you drag to the opposite, he turns and flies at the other direction. This involves three animations.

So, we start with the first codeblock where I check to see in what direction the player wants the character to fly.

local function getSpriteSeq(event)
   
   SPRITE_STATE = event.sprite.sequence
    
end 
 
Runtime:addEventListener("touch", moveforward)
 
local function moveforward( event)
        
        --> Save startposition when dragging
        if(event.phase=="began") then
                x0 = event.x
 
        end
        --> Check what direction we are going for...
        if(event.phase=="moved") then
        
        if not (player==nil) then
                
                if(x0 < event.x) then
                
                        --> Flying forward
 
                        player:applyLinearImpulse(.02, 0, player.x, player.y)   
 
                        if(SPRITE_STATE=="fly_left") then
                                display.getCurrentStage():setFocus(nil)
                                
                                player:prepare("turn_right")
                                player:play() 
                        end
                else
                        --> Flying backward
                        player:applyLinearImpulse(-.02, 0, player.x, player.y)
                        if(SPRITE_STATE=="fly_right") then
                          display.getCurrentStage():setFocus(nil)
                          player:prepare("turn_left")
                          player:play() 
                        end
                end
                
        end
        
 end
 display.getCurrentStage():setFocus( nil )
 
end

views:1613 update：2011/10/4 8:06:35


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