Particle-Module-Templates/bubbles.lua at main · KrysB4k/Particle-Module-Templates · GitHub

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-- defining module parameters

local module = createModule()

module.params.indexNG = 3
module.params.lifeTime = 90
module.params.radiusMin = 768
module.params.radiusMax = 1024

-- defing the group and init functions

local bubbles

local function bubbleInit()
    local part = createSpritePart(bubbles) -- create a particle of the "bubbles" group

    part.emitterIndex = getTombIndex(module.params.indexNG) -- get Tomb index of moveable

    part.lifeSpan = module.params.lifeTime

    part.sizeStart = randomInt(32, 128)
    part.sizeEnd = part.sizeStart

    part.colStart.r = 64
    part.colStart.g = randomInt(200, 255)
    part.colStart.b = randomInt(200, 255)
    part.colEnd = part.colStart

    -- circular spawning formation
    local ang = degToRad(randomInt(0, 359)) -- get random angle between 0 and 359 degrees, convert to radians
    local r = randomFloat(768, 1024) -- circle radius

    local cx = r * cos(ang)
    local cy = r * sin(ang)

    part.pos.x = cx
    part.pos.y = randomFloat(-512, 512)
    part.pos.z = cy

	-- upwards velocity depends on size of bubble (bigger is faster)
	part.vel.y = -part.sizeStart * 0.25

    part.spriteIndex = 13 -- "bubble" sprite texture
    part.fadeIn = 30 -- fade in for 1 second
    part.fadeOut = 30 -- fade out for 1 second
end

bubbles = createGroup(bubbleInit, nil)