3D Color Zone Animation

// 3D COLOR ZONE ANIMATION

init<-0;
factor<-0;
ColorTable<-0;

// This function is called repeatedly for each step of the robot.

function Voxel_Step()
{
  local x,y,z,i,u,v, Height;
  
  // Startup code, build the environnment. Executes only once.
  
  if (init ==0)
  {
    init = 1;
    Image_New(0,32,32);
    Image_Clear(0,0);
    ColorTable = [0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,8,9,10,11,12,13,14,15];
  }
  
  // Compute height map and store values in the canva.
  
  for (x=0;x<32;x++)
    for (y=0;y<32;y++)
    {
      u = sin(y*0.09817477*3.2); //5.092958185
      v = sin(x*0.09817477*3.2);
      u = u*v*sin(factor)*10+10;
      Image_SetPixel(0,x,y, u.tointeger());
    }
  
  // Draw in the 3D world according to above height map values.
  
  for (x=0;x<32;x++)
    for(z=0;z<32;z++)
      for (y=0;y<20;y++)
      {
        UNF_PlaceVoxel3D(x+1,y-11,z, (Image_GetPixel(0,x,z) >= y) ? ColorTable[y]+216:0);
      }
    factor+=0.1;
}