Dot Analysis - Visual Simulator (Need help creating the code)

tactfulgamer

Hello everybody,

I was hoping someone would know how to create the following code -> because i just don’t know how.

I am conducting a visual analysis of motion by using dots.
The image I attached expresses what i am trying to produce with the code - which is explained below:

1. the red dot moves along the negative of the x,y axis on the yellow arrow
2. the red dot then returns back to its origin (depicted by the yellow curved arrow - yellow arrow is not part of code)
3. the red dot is to repeat this 25% of the time (the time being 7 seconds) so 25% of every 7 seconds
4. all the gray dots are slowly moving, amongst themselves in small circles, constantly at all times (depicted by the blue arrow) sort of like an orbit

West

Here is a starter for 10. Probably not exactly what you were after, but should give you enough of an idea to get going

-- Dots
viewer.mode=FULLSCREEN
-- Use this function to perform your initial setup
function setup()
  redDot=vec2(WIDTH/2,HEIGHT/2) --initial position of red dot
  dotSize=100 --size of dots
  redDotSpd=3 --speed of red dot
  redDotTravel=0 --how far the red dot has travelled
  redDotTravelLimit=100 --the limit after which the red dot disappears
  --adjust the redDotSpd and RedDotTravel to be 1/4 of 7s

  greyDots={vec2(200,400),vec2(300,600),vec2(400,800),vec2(700,900),vec2(900,800),vec2(1100,600),vec2(800,300)} --centre of each grey dot
  greyDotSpd=3 --orbital speed of grey dots
  greyOrbitSize=20 --the size of the grey dot orbit
end

-- This function gets called once every frame
function draw()
  -- This sets a dark background color
  background(40, 40, 50)
  noStroke()
  redDotTravel = redDotTravel + 1
  fill(255,0,0)

  ellipse(redDot.x,redDot.y,dotSize)
  if redDotTravel<redDotTravelLimit then
    redDot.x = redDot.x - redDotSpd
    redDot.y = redDot.y - redDotSpd
  else
    redDot=vec2(WIDTH/2,HEIGHT/2)
  end
  if redDotTravel>4*redDotTravelLimit then

    redDotTravel=0
  end
  fill(200)
  for i, g in pairs(greyDots) do
    ellipse(g.x+greyOrbitSize*math.sin(ElapsedTime*greyDotSpd),g.y+greyOrbitSize*math.cos(ElapsedTime*greyDotSpd),dotSize)
  end

end

tactfulgamer

@West
Thank you!

Yes this will definitely set me on my path.

I will try to get each dot to move individually, within its own orbit.. instead of all in unified movement.

This is perfect! thank you - thank you