Navigation and Collision Detection for Web-Based 3D Experiment - Interactive Web-Based Virtual Reality with Java 3D - page 362

wakeup = (WakeupCriterion) criteria.nextElement();

if (wakeup instanceof WakeupOnAWTEvent)

{

event = ((WakeupOnAWTEvent)wakeup).getAWTEvent();

for (int i=0; i<event.length; i++)

{

processKeyEvent((KeyEvent) event[i]);

}

}

if (wakeup instanceof WakeupOnBehaviorPost)

{

try {

Thread.sleep(delay);

} catch (Exception ie) {

System.out.println(“Interrupted Exception!”);

}

if (buttonvalue.indexOf(“Forward”) != -1)

{

direction = Forward;

viewposi.x = viewposi.x-2.0f*SPAN*(float)Math.sin(turningAngle);

viewposi.z = viewposi.z-2.0f*SPAN*(float)Math.cos(turningAngle);

setPosition(bodyTrans, viewposi);

setPosition(viewTrans, viewposi);

if (outsideTrans!=null)

setPosition(outsideTrans, new Point3f(Outsidescale*viewposi.x, outsideposi.y, outsideposi.z));

}

else if (buttonvalue.indexOf(“Backward”) != -1)

{

direction = Backward;

viewposi.x = viewposi.x+2.0f*SPAN*(float)Math.sin(turningAngle);

viewposi.z = viewposi.z+2.0f*SPAN*(float)Math.cos(turningAngle);

setPosition(bodyTrans, viewposi);

setPosition(viewTrans, viewposi);

if (outsideTrans!=null)

setPosition(outsideTrans, new Point3f(Outsidescale*viewposi.x, outsideposi.y, outsideposi.z));

}

else if (buttonvalue.indexOf(“Turnleft”) != -1)

{

if (pitchAngle!=0)

{

setRotation(viewTrans, -pitchAngle, comMat, 2);

pitchAngle = 0.0f;

}

setRotation(viewTrans, ANGLESTEP, comMat, 1);

turningAngle += ANGLESTEP;

}

else if (buttonvalue.indexOf(“Turnright”) != -1)

{

if (pitchAngle!=0)

{

setRotation(viewTrans, -pitchAngle, comMat, 2);

pitchAngle = 0.0f;