NOC W3 – wind chime🎐 – Welcome to Lisa's Blog ! (◓Д◒)۶

Natural Phenomena with Forces

Brife introduce:

In this sketch, I try to mimic the centrifugal force for the upper object, and gravity and wind for the hanging ball with a fixed string length. I personalize the color and the shape to make it look more childlike.

Inspiration:

Working Process:

At first, I want to make apply all these forces in one single set of objects. So, I started with the gravity and wind one.

sketch

By setMag() and limit() for the vector, I am able to make the string with a fixed length and let the wind force and gravity be applied smoothly.

Then I started to use vector to mimic the centrifugal force.

I experiment a little bit for the circle and ellipse track. If I want a circular track, I need to take care of the size of the force, and its velocity’s direction and value. F=mv^2/R

sketch

I first draw the tracks i need using Vector.

Then connecting each vector’s endpoint together.

I use lerp for vector to give the ball a smooth transition between mover1 and mover2.

sketch here

In this version I use solely vectors to make balls follow an elliptical trajectory. However, I then find that I can only create one in this way, and I fail to make them in an array to have different positions.

I also found that because a segment of the vector was always at the origin, and my wind chimes were circling the ellipse instead of a fixed point, I had a hard time combining my two sketches, so I changed the end goal, and I made the two OBJECTS separately. I changed the shape of the first wind chime so that one end of the rope was pooled at the origin and finally moved to the adapted position with the translate. To be able to generate a series of blobs, for the elliptical shaped trajectory, I used cos and sin instead of vector, returning to my comfort zone for a while 😇.

I use forloop to arrange different balls in the ellipse-shaped track and assign them different mass so that their acceleration is different. The biger the mass, the harder it is to change their moving state.