code: public void setSpotLight(int i, Color color, boolean enableColor, Vector3D v, float nx, float ny,	float nz, float angle) {
  	    float spotColor[] = {
              (float)color.getRed(),
              (float)color.getGreen(),
              (float)color.getBlue(),
              (float)color.getAlpha()
          };
  		float pos[] = {
  		    (float)v.getX(),
  		    (float)v.getY(),
  		    (float)v.getZ(),
  		    0.0f
  		};
  		float direction[] = { nx, ny, nz };
  		float a[] = { angle };
  		gl.glEnable(GL2.GL_LIGHTING);
  		gl.glEnable(GL2.GL_LIGHT0 + i);
  		gl.glLightfv(GL2.GL_LIGHT0 + i, GL2.GL_POSITION, pos, 0);
  		if(enableColor)
  		    gl.glLightfv(GL2.GL_LIGHT0 + i, GL2.GL_DIFFUSE, spotColor, 0);
  		gl.glLightfv(GL2.GL_LIGHT0 + i, GL2.GL_SPOT_DIRECTION, direction, 0);
  		gl.glLightfv(GL2.GL_LIGHT0 + i, GL2.GL_SPOT_CUTOFF, a, 0);
  	}
docs: Sets the color value, position, direction and the angle of the spotlight cone of the No.i spotLight