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| _W = display.contentWidth;
_H = display.contentHeight;
m = {}
m.random = math.random;
local state = display.newGroup();
-- Imports
local movieclip = require("movieclip");
local physics = require("physics");
physics.start();
-- Import projectile classes
local projectile = require("projectile");
-- Variables setup
local projectiles_container = nil;
local force_multiplier = 10;
local velocity = m.random(50,100);
-- Visible groups setup
local background = display.newGroup();
local slingshot_container = display.newGroup();
-- Build the catapult
-- Slingshot
local sling = display.newImage("images/sling.png",true);
sling:setReferencePoint(display.CenterReferencePoint);
sling.x = 159; sling.y = 743;
-- Move catapult up
slingshot_container.y = 50;
local state_value = nil;
-- Transfer variables to the projectile classes
projectile.shot = shot;
projectile.band_stretch = band_stretch;
-- Background image
local bg_image = display.newImage("lavel1base.png",true);
background:insert(bg_image);
local slingshot = display.newImage("slingshot.png",350,380)
--[[
projectile TOUCH FUNCTION
]]--
local function projectileTouchListener(e)
-- The current projectile on screen
local t = e.target;
-- If the projectile is 'ready' to be used
if(t.ready) then
-- if the touch event has started...
if(e.phase == "began") then
-- Play the band stretch
audio.play(band_stretch);
-- Set the stage focus to the touched projectile
display.getCurrentStage():setFocus( t );
t.isFocus = true;
t.bodyType = "kinematic";
-- Stop current physics motion, if any
t:setLinearVelocity(0,0);
t.angularVelocity = 0;
-- Init the elastic band.
local myLine = nil;
local myLineBack = nil;
-- Bunny eyes animation
-- If the target of the touch event is the focus...
elseif(t.isFocus) then
-- If the target of the touch event moves...
if(e.phase == "moved") then
-- If the band exists... refresh the drawing of the line on the stage.
if(myLine) then
myLine.parent:remove(myLine); -- erase previous line
myLineBack.parent:remove(myLineBack); -- erase previous line
myLine = nil;
myLineBack = nil;
end
-- If the projectile is in the top left position
if(t.x < 105 and t.y < _H - 165)then
myLineBack = display.newLine(t.x - 30, t.y, 455, _H - 125);
myLine = display.newLine(t.x - 30, t.y, 375, _H - 125);
-- If the projectile is in the top right position
elseif(t.x > 105 and t.y < _H - 125)then
myLineBack = display.newLine(t.x + 10, t.y - 25, 455, _H - 125);
myLine = display.newLine(t.x + 10, t.y - 25, 375, _H - 125);
-- If the projectile is in the bottom left position
elseif(t.x < 105 and t.y > _H - 125)then
myLineBack = display.newLine(t.x - 25, t.y + 20, 455, _H - 125);
myLine = display.newLine(t.x - 25, t.y + 20, 375, _H - 125);
-- If the projectile is in the bottom right position
elseif(t.x > 105 and t.y > _H - 125)then
myLineBack = display.newLine(t.x - 15, t.y + 30, 455, _H - 125);
myLine = display.newLine(t.x - 15, t.y + 30, 375, _H - 125);
else
-- Default position (just in case).
myLineBack = display.newLine(t.x - 25, t.y, 420, _H - 125);
myLine = display.newLine(t.x - 25, t.y, 375, _H - 125);
end
-- Set the elastic band's visual attributes
myLineBack:setColor(20,51,51);
myLineBack.width = 12;
myLine:setColor(20,51,51);
myLine.width = 12;
-- Insert the components of the catapult into a group.
slingshot_container:insert(sling);
slingshot_container:insert(myLineBack);
slingshot_container:insert(t);
slingshot_container:insert(myLine);
slingshot_container:insert(sling);
-- Boundary for the projectile when grabbed
local bounds = e.target.stageBounds;
bounds.xMax = 600;
bounds.xMin = 300;
bounds.yMax = _H - 250;
bounds.yMax = 250;
if(e.y > bounds.yMax) then
t.y = e.y;
else
end
if(e.x < bounds.xMax) then
t.x = e.x;
else
-- Do nothing
end
-- If the projectile touch event ends (player lets go)...
elseif(e.phase == "ended" or e.phase == "cancelled") then
-- Open bunny eyes
-- Remove projectile touch so player can't grab it back and re-use after firing.
projectiles_container:removeEventListener("touch", projectileTouchListener);
-- Reset the stage focus
display.getCurrentStage():setFocus(nil);
t.isFocus = false;
-- Play the release sound
audio.play(shot);
-- Remove the elastic band
if(myLine) then
myLine.parent:remove(myLine); -- erase previous line
myLineBack.parent:remove(myLineBack); -- erase previous line
myLine = nil;
myLineBack = nil;
end
-- Launch projectile
t.bodyType = "dynamic";
t:applyForce((160 - e.x)*force_multiplier, (_H - 160 - e.y)*force_multiplier, t.x, t.y);
t:applyTorque( 100 )
t.isFixedRotation = false;
-- Wait a second before the catapult is reloaded (Avoids conflicts).
t.timer = timer.performWithDelay(1000, function(e)
state:dispatchEvent({name="change", state="fire"});
if(e.count == 1) then
timer.cancel(t.timer);
t.timer = nil;
end
end, 1)
end
end
end
end
--[[
SPAWN projectile FUNCTION
]]--
local function spawnProjectile()
-- If there is a projectile available then...
if(projectile.ready)then
projectiles_container = projectile.newProjectile();
-- Flag projectiles for removal
projectiles_container.ready = true;
projectiles_container.remove = true;
-- Reset the indexing for the visual attributes of the catapult.
slingshot_container:insert(projectiles_container);
-- Reset bunny eyes animation
-- Add an event listener to the projectile.
projectiles_container:addEventListener("touch", projectileTouchListener);
end
end
--[[
GAME STATE CHANGE FUNCTION
]]--
function state:change(e)
if(e.state == "fire") then
-- You fired...
-- new projectile please
spawnProjectile();
end
end
-- Tell the projectile it's good to go!
projectile.ready = true;
-- Spawn the first projectile.
spawnProjectile();
-- Create listnener for state changes in the game
state:addEventListener("change", state); |
views:1857 update：2011/10/9 22:34:50