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XNA 4 3D Game Development by Example: Beginner's Guide

You're reading from   XNA 4 3D Game Development by Example: Beginner's Guide Create action-packed 3D games with the Microsoft XNA Framework with this book and ebook.

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Product type Paperback
Published in Sep 2012
Publisher Packt
ISBN-13 9781849687089
Length 322 pages
Edition 1st Edition
Languages
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Author (1):
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Kurt Jaegers Kurt Jaegers
Author Profile Icon Kurt Jaegers
Kurt Jaegers
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Table of Contents (16) Chapters Close

XNA 4 3D Game Development by Example Beginner's Guide
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
1. Introduction to XNA FREE CHAPTER 2. Cube Chaser – A Flat 3D World 3. Cube Chaser – It's A-Mazing! 4. Cube Chaser – Finding Your Way 5. Tank Battles – A War-torn Land 6. Tank Battles – The Big Guns 7. Tank Battles – Shooting Things 8. Tank Battles – Ending the War 9. Mars Runner 10. Mars Runner – Reaching the Finish Line

Time for action – enemy shots versus the rover


To check if the enemy shots as well as rover shots have hit their respective targets, perform the following steps:

  1. 1. Add the CheckEnemyShotHits() method to the Collision Detection region of the ShotManager class as follows:

    public bool CheckEnemyShotHits(BoundingBox target)
    {
        foreach (EnemyShot shot in enemyShots)
        {
            if (shot.IsActive)
            {
                if (target.Intersects(shot.Bounds))
                {
                    return true;
                }
            }
        }
    
        return false;
    }
  2. 2. Add a new property to the Rover class for collision bounds checking:

    public BoundingBox CollisionBounds
    {
        get
        {
            BoundingBox baseBounds = Bounds;
            baseBounds.Min += new Vector3(1, 1, 1);
            baseBounds.Max += new Vector3(-1, -1, -1);
            return baseBounds;
        }
    }
  3. 3. In the Update() method of the MarsRunnerGameClass, just after checking for hits on the alien craft, check for hits on the player as follows:

    if (shotManager...
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