Adding GLUT elements and setting up the viewport

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import com.sun.opengl.util.*; //needed for GLUT ... private GLU glu; private GLUT glut;
We import the necessary library and declare class variables for glu and glut objects. In our init() method we instantiate them.

We create a method to set the camera angles. We call this method inside reshape() with a specified aspect ratio and in display() with -1. The projection and modelview matrices are set and our viewing perspective.
private void track_camera(GL gl, float ratio) { gl.glMatrixMode(GL.GL_PROJECTION); gl.glLoadIdentity(); if (ratio < 0) { glu.gluPerspective(45.0f, ratio, 1.0f, 500.0f); } else { glu.gluPerspective(45.0f, 1.0f, 1.0f, 500.0f); } gl.glMatrixMode(gl.GL_MODELVIEW); gl.glLoadIdentity(); }

We set our eyes viewing angle glu.gluLookAt(150.0f, 150.0f, 200.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f);

Finally we draw some shapes in the method, pushing onto the matrix stack, translating the position, and then popping the view matrix from the stack. ... //blue cone gl.glPushMatrix(); gl.glColor3f(0.0f, 0.0f, 1.0f); gl.glTranslatef(50.0f, 0.0f, -60.0f); glut.glutSolidCone(25.0f, 50.0f, 50, 50); gl.glPopMatrix(); ...