with this script (it was originally made to learn how to use keypress events) you are able to control the speed and the direction of energy particles (NEUT, ELEC, PHOT). change the direction with arrow keys and the vx/vy speed with J (+0.1) and K (-0.1). the speed is updated only after pressing an arrow key.

local epup = false
local epdown = false
local epright = false
local epleft = false

local active = true
local vnum = 1
local epdir = ""
local hud = 1

function control(key,dkey,_,event)
    if dkey == 273 then --up arrow
        epup = true
        epdown = false
        epright = false
        epleft = false
        active = true
    end
    if dkey == 274 then --down arrow
        epup = false
        epdown = true
        epright = false
        epleft = false
        active = true
    end
    if dkey == 276 then --right arrow
        epup = false
        epdown = false
        epright = true
        epleft = false
        active = true
    end
    if dkey == 275 then --left arrow
        epup = false
        epdown = false
        epright = false
        epleft = true
        active = true
    end
    if event==1 then
        if key == "j" then
            vnum=vnum+0.1
        end
        if key == "m" then
            vnum=vnum-0.1
        end
        if key == "h" and hud==1 then
            tpt.unregister_step(status)
            hud=0
        else
            if key == "h" and hud==0 then
                tpt.register_step(status)
                hud=1
            end
        end
    end
end

function contr(i,x,y,s,n)
    if active then
        if epup then
            tpt.set_property("vy",-vnum)
            tpt.set_property("vx",0)
            pdir = "up"
            active = false
        end
        if epdown then
            tpt.set_property("vy",vnum)
            tpt.set_property("vx",0)
            pdir = "down"
            active = false
        end
        if epright then
            tpt.set_property("vy",0)
            tpt.set_property("vx",-vnum)
            pdir = "left"
            active = false
        end
        if epleft then
            tpt.set_property("vy",0)
            tpt.set_property("vx",vnum)
            epdir = "right"
            active = false
        end
    end
end

function status()
    tpt.drawtext(155,5,"Energy particle speed:",0,255,0)
    tpt.drawtext(260,5,vnum)
    tpt.drawtext(285,5,"Direction:",0,255,0)
    tpt.drawtext(332,5,epdir)
end

tpt.register_step(status)
tpt.element_func(contr,tpt.el.phot.id)
tpt.element_func(contr,tpt.el.neut.id)
tpt.element_func(contr,tpt.el.elec.id)
tpt.register_keypress(control)
--By MrSalit0s


@boxmein (View Post)

thanks! i will make an animated gif and add it to the first post then :)

@boxmein (View Post)

thanks again ^^ this is definitely better than the program i used before to capture gif's.

@mniip (View Post)

okay, these things have changed now. don't know why i used parentheses here