code: public void setEmissive(float red, float green, float blue){
          emissive[0] = red;
          emissive[1] = green;
          emissive[2] = blue;
          Em = true;
      }
docs: Sets the emissive color of the material used for drawing shapes drawn to the screen.
  
  @param red
  The red color of the emissive.
  @param green
  The green color of the emissive.
  @param blue
  The blue color of the emissive.