hi

I have a sketch in 3d which - due to my lack of understanding - is leaving trails of objects on the screen as they move upon each loop of the draw function. I am using the OCD camera library and sliders as well which are the device that is controlling the positioning of the moving objects.

I am looking for something that might clear the screen between draw loops so that when I make a change it appears as though the object itself has moved.

here's my draw function:
void draw(){
 background(224);
 camera1.feed();
 setupGrid();
 g = buildAnimalGraph();

if (g != null) {
   g.draw();  
 }
 smooth();
}

and

Graph buildAnimalGraph() {
 int maxAnimals = 1000;

 animalValuesTable = new Table("animalValues-06.txt");
 weightedEdgesTable = new Table("weightexperiment-02.txt");
 rowCountAVT = animalValuesTable.getRowCount();
 rowCountWET = weightedEdgesTable.getRowCount();
 
  for (int row = 1; row < rowCountAVT; row++) {
    float weight = animalValuesTable.getFloat(row,1);
    String diet = animalValuesTable.getString(row,15);
    String climate = animalValuesTable.getString(row,4);
    String common = animalValuesTable.getString(row,0);
    String special = animalValuesTable.getString(row,10);

   Node temp = new Node(weight, diet, climate, common, special);
   g.addNode(temp);
}

 for (int row=1; row<rowCountWET-2100; row++) {
   String source = weightedEdgesTable.getString(row,0);
   String target = weightedEdgesTable.getString(row,1);
   float weight = weightedEdgesTable.getFloat(row,2);  
 }
 return g;
}