Spawning Display Groups

Audio and Graphics
#1

Hello,

I have been trying to spawn a display group in my game using a spawn function. Actually i need to spawn one display group at a time, my code is not working, Please help

bar1 = display.newGroup( ) colort1 = display.newRect(bar1,0,hi\*4+200,wi,20) colort1.x = colort1.width/2 - colort1.width colort1:setFillColor(200/255,55/255,55/255) physics.addBody(colort1,"static",{}) colort1.isSensor = true colort2 = display.newRect(bar1,0,hi\*4+200,wi,20) colort2.x = colort1.x + colort1.width colort2:setFillColor(55/255,171/255,200/255) physics.addBody(colort2,"static",{}) colort2.isSensor = true local spawn = function(type) local barr = display.newGroup(type) barr.x = display.contentWidth/2 barr.y = 20 return barr end spawn(bar1)

Thank You :slight_smile:

Kallol

#2

You don’t spawn display groups in a sense. I always thought of display groups as rubber bands the hold objects together.
documentation(https://docs.coronalabs.com/daily/api/library/display/newGroup.html)
Note: I am on mobile and so thing may look pretty code wise but it should get the job done
If you want to spawn a group like you have above you would do this:

local barr

local spawn = function(myType, colorTable)

local bar1 = display.newGroup()
local currentX= 0
for i= 1,#colorTable do

local colort1 = display.newRect(currentX,0,50,50)
currentX= currentX+50
colort1:setFillColor(colorTable[i][1],colorTable[i][2],colorTable[i][3])
physics.addBody(colort1,“static”,{})
colort1.isSensor = true
colort1.myType = myType

end

bar1.x, bar1.y = display.contentCenterX, display.contentCenterY

return bar1

end
local myColorTable1 ={}
myColorTable[1]= {55/255,171/255,200/255}
myColorTable[2]= {200/255,55/255,55/255}
barr= spawn(“bar1”, myColorTable1)
– you can now control the group
barr.alpha =.5–just an example

#3

type is a reserved word (referencing a lua function), so that may be part of your trouble.

#4

I didn’t think you can pass anything into display.group()

#5

@scottrules44, you’re correct. display.newGroup() will ignore anything passed to it.

@Kallol it would be really helpful to know how its not working. A description of what is happening and what you expect would be super useful. Are you getting errors? Remember we can’t see what you’re seeing.

Rob

#6

@scotruless44 Thank you I will try that

@Rob Nothing is being displayed on the screen.

In my game i have different bar types and in each bar type the two or more different colors will have different collision events, Therefore to spawn two or more colors one bar i will have to spawn them as a group…How do I do this?

#7

[quote name=“playpunkgames” post=“329770” timestamp=“1465501651”]@scotruless44 Thank you I will try that @Rob Nothing is being displayed on the screen. In my game i have different bar types and in each bar type the two or more different colors will have different collision events, Therefore to spawn two or more colors one bar i will have to spawn them as a group…How do I do this?[/quote] I just updated my code above, I removed attributes that were not specified because I don’t what those values. I made a few error my self

#8

You never put anything into those display.newGroups().

Rob

#9

@scottruless44 Please have a look at my previous comment and see if you can help me in this situation… :slight_smile:

Actually in my game the player have to go through a bar …if the player passes through the like color then he scores and if the player passes through unlike color he would die…Now i have 8 types of bar (about bars i mentioned in the previous reply) …aI need to spawn those randomly over time and each spawned bar will move on the y axis and leave the screen making the player go through it…

I can do the other stuffs but having problem with the spawning

#10

Just moded my code again to be more customizable.

Hopefully you can figure out how to add collision event.

Edit: just moded again, forgot myType attribute

#11

You don’t spawn display groups in a sense. I always thought of display groups as rubber bands the hold objects together.
documentation(https://docs.coronalabs.com/daily/api/library/display/newGroup.html)
Note: I am on mobile and so thing may look pretty code wise but it should get the job done
If you want to spawn a group like you have above you would do this:

local barr

local spawn = function(myType, colorTable)

local bar1 = display.newGroup()
local currentX= 0
for i= 1,#colorTable do

local colort1 = display.newRect(currentX,0,50,50)
currentX= currentX+50
colort1:setFillColor(colorTable[i][1],colorTable[i][2],colorTable[i][3])
physics.addBody(colort1,“static”,{})
colort1.isSensor = true
colort1.myType = myType

end

bar1.x, bar1.y = display.contentCenterX, display.contentCenterY

return bar1

end
local myColorTable1 ={}
myColorTable[1]= {55/255,171/255,200/255}
myColorTable[2]= {200/255,55/255,55/255}
barr= spawn(“bar1”, myColorTable1)
– you can now control the group
barr.alpha =.5–just an example

#12

type is a reserved word (referencing a lua function), so that may be part of your trouble.

#13

I didn’t think you can pass anything into display.group()

#14

@scottrules44, you’re correct. display.newGroup() will ignore anything passed to it.

@Kallol it would be really helpful to know how its not working. A description of what is happening and what you expect would be super useful. Are you getting errors? Remember we can’t see what you’re seeing.

Rob

#15

@scotruless44 Thank you I will try that

@Rob Nothing is being displayed on the screen.

In my game i have different bar types and in each bar type the two or more different colors will have different collision events, Therefore to spawn two or more colors one bar i will have to spawn them as a group…How do I do this?

#16

[quote name=“playpunkgames” post=“329770” timestamp=“1465501651”]@scotruless44 Thank you I will try that @Rob Nothing is being displayed on the screen. In my game i have different bar types and in each bar type the two or more different colors will have different collision events, Therefore to spawn two or more colors one bar i will have to spawn them as a group…How do I do this?[/quote] I just updated my code above, I removed attributes that were not specified because I don’t what those values. I made a few error my self

#17

You never put anything into those display.newGroups().

Rob

#18

@scottruless44 Please have a look at my previous comment and see if you can help me in this situation… :slight_smile:

Actually in my game the player have to go through a bar …if the player passes through the like color then he scores and if the player passes through unlike color he would die…Now i have 8 types of bar (about bars i mentioned in the previous reply) …aI need to spawn those randomly over time and each spawned bar will move on the y axis and leave the screen making the player go through it…

I can do the other stuffs but having problem with the spawning

#19

Just moded my code again to be more customizable.

Hopefully you can figure out how to add collision event.

Edit: just moded again, forgot myType attribute