Let there be light

The second task of our current mission is to turn the mesh we created in the first task into a solid sphere with a smooth surface. We will use different light sources to illuminate our sphere and define so-called normal vectors for each vertex to make our sphere's surface look smooth without the need for a very dense mesh.

Engage Thrusters

Let's turn on some lights:

1. Open the sketch we created for the last task.

2. Our mesh is currently hollow, and we can see the front-facing lines as well as the back of the sphere. To change this, we can define a fill color for the faces.

   PShape makeSphere( int r, int step) {
     PShape s = createShape();
     
     s.beginShape(QUAD_STRIP);
     s.fill(200);
     s.stroke(255);
     s.strokeWeight(2);
     for( int i = 0; i < 180; i+=step ) {
       float sini = sin( radians( i ));
       float cosi = cos( radians( i ));
       float sinip = sin( radians( i + step ));
       float cosip = cos( radians( i + step ));
   
       for( int j = 0; j <= 360; j+=step ) {
      float...