B2.ParticleSystem:createParticleGroup

Available since: Gideros 2011.6
Class: b2.ParticleSystem

Description

Creates a group of multiple particles with the same properties. The possible table properties are:

  • flags: the particle-behavior flags
  • groupFlags: the group-construction flags
  • position: the world position of the group. Moves the group's shape a distance equal to the value of position
  • angle: the world angle of the group in radians. Rotates the shape by an angle equal to the value of angle
  • linearVelocity: the linear velocity of the group's origin in world co-ordinates
  • angularVelocity: the angular velocity of the group
  • color: the color of all particles in the group
  • alpha: the alpha of all particles in the group
  • strength: the strength of cohesion among the particles in a group with flag b2.ParticleSystem.FLAG_ELASTIC or b2.ParticleSystem.FLAG_SPRING
  • shape: the shape where particles will be added
  • lifetime: lifetime of the particle group in seconds. A value <= 0.0f indicates a particle group with infinite lifetime
b2.ParticleSystem:createParticleGroup(particleGroupDef)

Parameters

particleGroupDef: (table) table with particle group data

Example

require "liquidfun"
local world = b2.World.new(0, 9.8)
local shape = b2.PolygonShape.new()
shape:setAsBox(128, 128)
local ps = world:createParticleSystem( { radius = 16 } )
ps:setTexture(Texture.new("gfx/myparticle.png"))
stage:addChild(ps)
ps:createParticleGroup({
	shape = shape,
	position = { x = 128, y = 128},
	color = 0xffffff,
	alpha=1,
	flags=b2.ParticleSystem.FLAG_VISCOUS,
})





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