Hello,
I m getting one issue in my game. I am Colliding two objects one of bullet type and another is of dynamic type. When my bullet type object collide with dynamic type object then it add force to other object(don’t know whether it is force or not) due which other objects are getting disturb.
I check below line in postcollision
print( "Collision force: " … event.force)
but i m getting nil value. can any one help me…?
Hello,
Please post some of your code here (in specific the collision setup and handling). This will help others assist you.
Thanks,
Brent
Here is my Code.
Bullet Class which return Object of bullet type
[lua]
local bun_bullet = {
name = “bun”,
type = “bullet”,
density=0.2,
friction=0,
bounce=0,
size = 20,
rotation = 100
}
– Init bullet
local bullet = display.newImage(bun_bullet.name…".png");
– Place bullet
bullet.x = 170; bullet.y = _H + 20;
– Set up physical properties
physics.addBody(bullet, {density=bun_bullet.density, friction=bun_bullet.friction, bounce=bun_bullet.bounce, radius=bun_bullet.size});
bullet.gravityScale = 0
bullet.linearDamping = 0.3;
bullet.angularDamping = 0.8;
bullet.isBullet = true;
bullet.isSensor = true;
– Transition the bullet into position each time it’s spawned
transition.to(bullet, {time=600, y=_H - 140, transition = xyz});
return Bullet
[/lua]
And I am having two object which bullet type object will collide
[lua]
–Collision
local function onCollision(event)
if ( event.phase == “began” ) then
if(event.object1.myName==“xyz” and event.object2.myName==“bun”) then
event.object1:removeSelf()
event.object2:removeSelf()
end
if(event.object1.myName==“abcd” and event.object2.myName==“bun”) then
event.object1:removeSelf()
event.object2:removeSelf()
end
end
end
Runtime:addEventListener(“collision”, onCollision)
[/lua]
Above object with Myname=abcd is object of below type
[lua]
local ball = display.newImage(group, “Special.png” )
ball.x=300
ball.y=900
physics.addBody(ball, { bounce=0.0, friction=0.0 } )
ball.myName=“abcd”
ball:addEventListener( “collision”, ball )
ball:applyForce(10, -120, ball.x-20, ball.y)
[/lua]
Above Object with Myname=xyz is object of below type
[lua]
local myImage = display.newImageRect(view, “xyz.png”,50,50 )
myImage.x = x
myImage.y = y
physics.addBody( myImage, { density=0.0, friction=0.0, bounce=0.0,velocity=-40 } )
myImage:setLinearVelocity(0, -30)
myImage.gravityScale = 0
if(coli==“true”) then
myImage.collision = onCollision
myImage:addEventListener( “collision”, myImage );myImage.myName=“letter”;
end
local myImage1 = display.newImageRect(view, “xyz.png”,50,50 )
myImage1.x = x + 40
myImage1.y = y
physics.addBody( myImage1, { density=0.0, friction=0.0, bounce=0.0,velocity=-40 } )
myImage1:setLinearVelocity(0, -30)
myImage1.gravityScale = 0
if(coli==“true”) then
myImage1.collision = onCollision
myImage1:addEventListener( “collision”, myImage );
myImage1.myName=“letter”;
end
[/lua]
Logic is some object are moving up side with linearVelocity and other are coming from down side with force.
I am not allowing object to get in contact with this code
[lua]
local function preCollision( event)
event.contact.isEnabled = false
end
local function postCollision( event )
self:removeEventListener( “preCollision” )
self:removeEventListener( “postCollision” )
end
Runtime:addEventListener( “postCollision”,postCollision )
Runtime:addEventListener( “preCollision”,preCollision)
[/lua]
One condition is occurring in my game when both object are getting in same place at that time my bullet type object hits object with Myname=abcd than object with Myname=xyz are getting disturb.
I think now all things are Clear
Hello,
Please post some of your code here (in specific the collision setup and handling). This will help others assist you.
Thanks,
Brent
Here is my Code.
Bullet Class which return Object of bullet type
[lua]
local bun_bullet = {
name = “bun”,
type = “bullet”,
density=0.2,
friction=0,
bounce=0,
size = 20,
rotation = 100
}
– Init bullet
local bullet = display.newImage(bun_bullet.name…".png");
– Place bullet
bullet.x = 170; bullet.y = _H + 20;
– Set up physical properties
physics.addBody(bullet, {density=bun_bullet.density, friction=bun_bullet.friction, bounce=bun_bullet.bounce, radius=bun_bullet.size});
bullet.gravityScale = 0
bullet.linearDamping = 0.3;
bullet.angularDamping = 0.8;
bullet.isBullet = true;
bullet.isSensor = true;
– Transition the bullet into position each time it’s spawned
transition.to(bullet, {time=600, y=_H - 140, transition = xyz});
return Bullet
[/lua]
And I am having two object which bullet type object will collide
[lua]
–Collision
local function onCollision(event)
if ( event.phase == “began” ) then
if(event.object1.myName==“xyz” and event.object2.myName==“bun”) then
event.object1:removeSelf()
event.object2:removeSelf()
end
if(event.object1.myName==“abcd” and event.object2.myName==“bun”) then
event.object1:removeSelf()
event.object2:removeSelf()
end
end
end
Runtime:addEventListener(“collision”, onCollision)
[/lua]
Above object with Myname=abcd is object of below type
[lua]
local ball = display.newImage(group, “Special.png” )
ball.x=300
ball.y=900
physics.addBody(ball, { bounce=0.0, friction=0.0 } )
ball.myName=“abcd”
ball:addEventListener( “collision”, ball )
ball:applyForce(10, -120, ball.x-20, ball.y)
[/lua]
Above Object with Myname=xyz is object of below type
[lua]
local myImage = display.newImageRect(view, “xyz.png”,50,50 )
myImage.x = x
myImage.y = y
physics.addBody( myImage, { density=0.0, friction=0.0, bounce=0.0,velocity=-40 } )
myImage:setLinearVelocity(0, -30)
myImage.gravityScale = 0
if(coli==“true”) then
myImage.collision = onCollision
myImage:addEventListener( “collision”, myImage );myImage.myName=“letter”;
end
local myImage1 = display.newImageRect(view, “xyz.png”,50,50 )
myImage1.x = x + 40
myImage1.y = y
physics.addBody( myImage1, { density=0.0, friction=0.0, bounce=0.0,velocity=-40 } )
myImage1:setLinearVelocity(0, -30)
myImage1.gravityScale = 0
if(coli==“true”) then
myImage1.collision = onCollision
myImage1:addEventListener( “collision”, myImage );
myImage1.myName=“letter”;
end
[/lua]
Logic is some object are moving up side with linearVelocity and other are coming from down side with force.
I am not allowing object to get in contact with this code
[lua]
local function preCollision( event)
event.contact.isEnabled = false
end
local function postCollision( event )
self:removeEventListener( “preCollision” )
self:removeEventListener( “postCollision” )
end
Runtime:addEventListener( “postCollision”,postCollision )
Runtime:addEventListener( “preCollision”,preCollision)
[/lua]
One condition is occurring in my game when both object are getting in same place at that time my bullet type object hits object with Myname=abcd than object with Myname=xyz are getting disturb.
I think now all things are Clear