Hello all,

How might I modify this code so it draw only based on mouse click, and I can drag only the shape that I choose with the mouse?

1. 
   import peasy.*;
   import kGeom.*;
   import processing.opengl.*;
   
   PeasyCam cam;
   int depth = 600;
   
   void setup(){
     size(600,400,OPENGL);
     cam = new PeasyCam(this, 600);
     smooth();
   }
   
   void draw(){
     background(0);
     stroke(0);
     strokeWeight(1);
     //noFill();
     fill(255);
   
     float pSize = 100;
   
     draw_tetrahedron(new kVec(0,0,0),pSize);
   
   
   }
   //---------------------------------------------------------------------------------------
   // This function will draw a tetrahedron (4 sided solid) to the screen.
   void draw_tetrahedron(kVec pos,float pSize){
     pushMatrix();
     translate(pos.x,pos.y,pos.z);
     scale(pSize);
     float[] four_sided_x = {
       0, (2*sqrt(2))/3, -sqrt(2)/3, -sqrt(2)/3              };
     float[] four_sided_y = {
       0, 0, sqrt(6)/3, -sqrt(6)/3              };
     float[] four_sided_z = {
       1, -1/3, -1/3, -1/3              };
   
     int[] tetra_vertex_faces_0 = {
       0, 1, 2              };
     int[] tetra_vertex_faces_1 = {
       0, 2, 3              };
     int[] tetra_vertex_faces_2 = {
       0, 3, 1              };
     int[] tetra_vertex_faces_3 = {
       1, 3, 2              };
     int[][] tetrahedron_array = {
       tetra_vertex_faces_0,tetra_vertex_faces_1, tetra_vertex_faces_2, tetra_vertex_faces_3               };
   
     beginShape(TRIANGLES);
     for (int e=0; e<tetrahedron_array.length;e++)
     {
       for (int f=0; f<tetrahedron_array[e].length;f++)
       {
         vertex(four_sided_x[tetrahedron_array[e][f]], four_sided_y[tetrahedron_array[e][f]], four_sided_z[tetrahedron_array[e][f]]);
       }
     }
     endShape();
     popMatrix();
   }
   

Hey guys,

I am a noob and I am learning how to draw a cube with shapes3d library using mouse events and then control its size and drag also via mouse like using wheel, right clikc, ...etc    I've seen many examples for this library, but still need an example that I can use and build on for my start

Thanks for you all