Documentation › API Reference › Object › Entity › Emitter

GetMaxScale

This function returns the max scaling factor for particles. The original particle size is multiplied by the scaling factor to get the final size.

Syntax

Returns

This function returns a float containing the maximum scaling factor for a particle.

Example

--Create a window
window = Window:Create()
context = Context:Create(window)
world = World:Create()
camera = Camera:Create()
camera:Move(0,0,-3)

--Create an emitter
emitter = Emitter:Create(100) 

emitter:ClearScaleControlPoints() --Remove default control points

emitter:AddScaleControlPoint(0,0) --at spawn the particle will have a scale of 0 
emitter:AddScaleControlPoint(.5,1) --halfway through the particle's lifetime its be equal to max scale
emitter:AddScaleControlPoint(1,0) --at death the particle will have a scale of 0

local maxscale = 1

while true do
    if window:Closed() or window:KeyHit(Key.Escape) then return false end

    Time:Update()
    world:Update()
    world:Render()
    
    --use up and down arrow key to ajust maxscale
    if (window:KeyDown(Key.Up)) then
        maxscale = maxscale + 1
        emitter:SetMaxScale(maxscale,maxscale) 
    elseif (window:KeyDown(Key.Down) and maxscale > 0) then
        maxscale = maxscale -1  
        emitter:SetMaxScale(maxscale,maxscale) 
    end

    context:SetBlendMode(Blend.Alpha) 
    context:DrawText("Max scale: "..emitter:GetMaxScale():ToString(),2,2) 
    
    context:Sync()
end