i have enemy… and i wanna spawn bullet from enemy.x,y at current distance…
how to do that??
This is very easy.
Before i give you code i want to ask some questions.
Where are you shooting the bullets?
Do you want a one tap and one bullet shoots or tap and hold and they shoot?
@InfiSnyp : i mean the enemy have gun,
the enemy not moving, the bullet spawn automaticly every 5 sec at 400 range…
from x = 400 to x = -400 (from right to left)
help me sir 
Are you using physics in your game?
I didn’t test this but it’s a general idea.
local physics = require("physics") physics.start() local bullet = {} local bCounter = 1 local bTimer local centerX = display.contentCenterX local centerY = display.contentCenterY function spawnBullet() local bWidth = 5 local bHeight = 10 local xFly = 0 local yFly = -200 bullet[bCounter] = display.newImageRect( centerX, centerY, bWidth, bHeight ) physics.addBody( bullet[bCounter], "dynamic", { isSensor = false } ) bullet[bCounter].gravityScale = 0 bullet[bCounter]:setLinearVelocity( xFly, yFly ) bCounter = bCounter + 1 end bTimer = timer.performWithDelay( 500, spawnBullet, -1 )@InfiSnyp : wow thanks sir… ill try this code first 
yes sir, im using physic…
If the code doesn’t make sense i can add in comments saying what does what.
@InfiSnyp : i got some error sir…
“attempt to index global value ‘bullet’(a nil value)”
Oops.
local physics = require("physics") physics.start() local bullet = {} local bCounter = 1 local bTimer local centerX = display.contentCenterX local centerY = display.contentCenterY function spawnBullet() local bWidth = 5 local bHeight = 10 local xFly = 0 local yFly = -200 bullet[bCounter] = display.newRect( centerX, centerY, bWidth, bHeight ) physics.addBody( bullet[bCounter], "dynamic", { isSensor = false } ) bullet[bCounter].gravityScale = 0 bullet[bCounter]:setLinearVelocity( xFly, yFly ) bCounter = bCounter + 1 end bTimer = timer.performWithDelay( 500, spawnBullet, -1 )@InfiSnyp : its work sir… but bullet spawn at wrong place… i wanna enemy shoot the hero
so if enemy name “enemy”
how to spawn bullet from enemy.x to hero.x??
i also have perspective camera… should i add bullet like this??
[lua]
camera:add(bullet,1,false)
[/lua]
You would do hero.x …
I dont know how you add you camera but just do some experementing and see if it works.
@InfiSynp : i try a lot but cant spawn at enemy.x
also when i insert at camera “camera:add(bullet)” it show error
i also try this
[lua]
transition.to(bullet, {time=1000, x=300, itirasions=-1,transition=easing.continuousLoop})
[/lua]
but it doesnt work
Are you trying to spawn the bullet on the hero and make it shoot like a machine gun?
@InfiSnyp : no sir… the enemy did…
enemy shoot to hero… repeatly…
its look simple but im confused
Oh. So your trying to get the bad guy to shoot the good guy?
Well for that you’d need to do some math. Let me make a small sample game for you.
Here. I think this is along the lines of what you want?
local physics = require("physics") physics.start() local bullet = {} local bCounter = 1 local bTimer local centerX = display.contentCenterX local centerY = display.contentCenterY local hero = display.newRect( centerX, centerY - 200, 20, 20 ) physics.addBody( hero, "dynamic" ) hero.gravityScale = 0 hero.myName = "hero" local enemy = display.newRect( centerX, centerY, 20, 20 ) physics.addBody( enemy, "static" ) enemy.gravityScale = 0 local function moveHero(event) if event.phase == "began" then display.getCurrentStage():setFocus( event.target ) elseif event.phase == "moved" then hero.x = event.x hero.y = event.y elseif event.phase == "ended" then display.getCurrentStage():setFocus(nil) end end hero:addEventListener( "touch", moveHero ) function onCollision(event) if event.phase == "began" then if event.target.myName == "hero" and event.other.myName == "bullet" then local removeIt = event.other display.remove(removeIt) end end end hero:addEventListener( "collision", onCollision ) function spawnBullet() local cirRadius = 2 local xFly = enemy.x - hero.x local yFly = enemy.y - hero.y bullet[bCounter] = display.newCircle( enemy.x, enemy.y, cirRadius ) physics.addBody( bullet[bCounter], "dynamic", { isSensor = true } ) bullet[bCounter].gravityScale = 0 bullet[bCounter]:setLinearVelocity( -xFly, -yFly ) bullet[bCounter].myName = "bullet" bCounter = bCounter + 1 end bTimer = timer.performWithDelay( 500, spawnBullet, -1 )Here’s some “upgraded” code.
local physics = require("physics") physics.start() local bullet = {} local bCounter = 1 local bTimer local centerX = display.contentCenterX local centerY = display.contentCenterY local hero = display.newRect( centerX, centerY - 200, 20, 20 ) physics.addBody( hero, "dynamic" ) hero.gravityScale = 0 hero.myName = "hero" local enemy = display.newRect( centerX, centerY, 20, 20 ) physics.addBody( enemy, "static" ) enemy.gravityScale = 0 local function moveHero(event) if event.phase == "began" then display.getCurrentStage():setFocus( event.target ) elseif event.phase == "moved" then hero.x = event.x hero.y = event.y elseif event.phase == "ended" then display.getCurrentStage():setFocus(nil) end end hero:addEventListener( "touch", moveHero ) function onCollision(event) if event.phase == "began" then if event.target.myName == "hero" and event.other.myName == "bullet" then local removeIt = event.other display.remove(removeIt) end end end hero:addEventListener( "collision", onCollision ) function spawnBullet() local cirRadius = 2 local speed = 2 local xFly = enemy.x - hero.x local yFly = enemy.y - hero.y local diff = xFly \* yFly local normX = xFly / diff local normY = yFly / diff bullet[bCounter] = display.newCircle( enemy.x, enemy.y, cirRadius ) physics.addBody( bullet[bCounter], "dynamic", { isSensor = true } ) bullet[bCounter].gravityScale = 0 bullet[bCounter]:setLinearVelocity( -xFly \* speed, -yFly \* speed ) bullet[bCounter].myName = "bullet" bCounter = bCounter + 1 end bTimer = timer.performWithDelay( 500, spawnBullet, -1 )@InfiSnyp : aw… thx so much sir…
sry for late replay… ill try this soon
This is very easy.
Before i give you code i want to ask some questions.
Where are you shooting the bullets?
Do you want a one tap and one bullet shoots or tap and hold and they shoot?
@InfiSnyp : i mean the enemy have gun,
the enemy not moving, the bullet spawn automaticly every 5 sec at 400 range…
from x = 400 to x = -400 (from right to left)
help me sir