This course includes

(updated Jan 2021)

  • 18 hours of on-demand video

  • Downloadable resources and exercises

  • Lifetime access

  • Access on mobile and desktop

  • Certificate of completion

  • 14 day money back guarantee

  • Secure checkout through Credit Card or PayPal

Prerequisites

Before taking this course, you must have:

  • Some experience with coding (variables, if-else, loops, functions).

  • Some familiarity with either Linux, Windows, or macOS.

Is this course for you?

This course will teach you how to create a complete raycasting engine from scratch, with wall projection, textures, sprites, and many optimizations using the C programming language. We'll use a similar technique used by Wolfenstein 3D and discuss the mathematics that underpin any raycasting implementation.
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Is this course for you?
Watch Intro Video

Motivations & Learning Outcomes

Focus on the fundamentals

We'll learn a similar technique used in the Wolfenstein 3D source code. We'll review all the required trigonometry, the projection formulas, and we'll also implement a very simple prototype using JavaScript to get the math out of the way before we dive into the C section of the course.
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Focus on the fundamentals

Kicking things up a notch!

We'll proceed to learn how we can use the C programming language to implement all the basic elements of a raycasting engine. We'll learn how to draw textured walls, render sprites, enemies, while also learning how to structure and polish our C code.
Buy $24.99
Kicking things up a notch!
  • Lifetime access

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  • Access to discussion forum

    Discuss course topics and engage with other students using the discussion board

  • Money back guarantee

    We offer a 14 day money back guarantee for all our courses. No questions asked.

Course Content

  • 2
    Trigonometry Review
  • 3
    2D Map and Player Movement
    • Defining the 2D Map Grid
    • Coding the Map Class
    • Player Movement
    • Coding the Player Movement
    • Exercise: Map Collision
    • Coding the Map Collision
  • 4
    Ray Casting
    • Defining the Field of View
    • Coding the Field of View Ray Increments
    • Finding Wall Hit
    • Finding Horizontal Intersections
    • Finding Vertical Intersections
    • DDA Algorithm
    • Finding the Intersection with the Grid Cells
    • Coding the Horizontal Wall Intersection
    • Coding the Vertical Intersection
    • Fixing the Intersection Offset Error
    • Careful with JavaScript Ternary Operator
    • Orientation as Angles or Vectors?
  • 5
    Rendering Walls
  • 6
    Starting our C Project
    • First Steps in C
    • A Heads Up for Windows Developers
    • Working with Makefile
    • Installing Visual Studio and SDL on Windows
    • Creating a SDL Window
    • SDL Rendering and Event Polling
    • Rendering SDL Rectangles
  • 7
    Creating a Game Loop
    • Game Loop Overview
    • Coding a Fixed Time Step Game Loop
    • SDL Delay
  • 8
    Map and Player Movement
    • Drawing the Map with SDL
    • Player Movement and SDL Events
    • Exercise: Wall Collision in C
    • Implementing Wall Collision in C
  • 9
    Casting Rays in our C Project
    • Ray Struct and FOV
    • Translating the Horizontal Intersection to C
    • Translating the Vertical Intersection to C
    • Rendering Rays
  • 10
    Color Buffer
    • The Color Buffer
    • Color Buffer Implementation
    • Freeing Allocated Resources
  • 11
    Wall Projection
    • Creating the Wall Projection
    • Exercise: Ceiling & Floor Solid Colors
    • Ceiling & Floor Solid Color Implementation
  • 12
    Wall Textures
    • Representing Textures
    • Creating a Texture Programmatically
    • Mapping Textures to Wall
    • Implementing Wall Texturing
    • Multiple Textures
    • Multiple Texture Code
    • Fixed Size Data Types
    • Using Fixed Size Integer Types
    • The Operator Sizeof
    • Libraries to Decode PNG Files
    • Loading External PNG Files
    • Using upng with Visual Studio
  • 13
    Fixing the Angle Increment Distortion
    • Activity: Field of View Distortion
    • Understanding the Angle Increment Distortion
    • Coding the Angle Increment Distortion Fix
  • 14
    Refactoring Project Files
    • Full Screen Window
    • Refactoring the Graphics File
    • Exercise: Drawing Rectangle
    • Drawing Filled Rectangles
    • Refactoring the Map File
    • Refactoring the Ray and Player File
  • 15
    Rendering Lines
    • The Line Equation
    • Rasterizing Lines
    • Coding the DDA Line Algorithm
  • 16
    Refactoring our Code
    • Refactoring the Wall Projection File
    • Creating a Type Definition for Color Values
    • Sending Parameters by Reference
    • Refactoring the Ray-Facing Code
    • Wall Texture Color Intensity
    • Coding the Texture Color Intensity
  • 17
    Sprites
    • Raycasting Sprites
    • Sprite Type Definition
    • Coding the Sprite Typedef
    • Rendering Sprites in the Minimap
    • Identifying Visible Sprites
    • Coding the Visible Sprites
    • Visible Sprites in Wolfenstein3D
    • Finding the Sprite Distance
    • Normalizing Player Rotation Angle
    • Calculating the Sprite Projection Height
    • Calculating the Sprite X Position
    • Sprite Rectangle Position in the Screen
    • Displaying Textured Sprites
    • Activity: Sorting Sprites
    • Sorting Sprites by Distance
    • Sprites Behind Walls
    • Fixing the Sprite Fishbowl Distortion
    • Concluding our Raycasting Implementation
    • Notes on Look-up Tables
    • Sprite Animation & Enemies
  • 18
    Conclusion & Moving Forward
    • Copyright & Content Distribution
    • Similar Courses

Instructor

  • Gustavo Pezzi

    Senior Lecturer

    Gustavo Pezzi

    Gustavo teaches computer science and mathematics at BPP University, London. He studies how teaching game programming can help enhance awareness and understanding of basic mathematics and physics. He is also a professional software engineer with more than 10 years of experience, with an industry background in 3D systems, games, systems, databases, and data analysis. His academic path includes institutions such as Pittsburg State University, City University of London, and University of Oxford.

Reviews

  • Excellent Course

    Peter Hering

    Gustavo presents clear and detailed explanations of raycasting concepts and provide understandable incremental examples.

    Gustavo presents clear and detailed explanations of raycasting concepts and provide understandable incremental examples.

    Read Less
  • Excellent detailed introduction to raycast

    Antonio Herrera Martin

    It was a detailed very useful introduction to raycasting. It has a complete idea of what you need, and you can use the concepts to expand for whatever more a...

    Read More

    It was a detailed very useful introduction to raycasting. It has a complete idea of what you need, and you can use the concepts to expand for whatever more advance development you want to do with the code.

    Read Less
  • Awesome course!

    Benjamin Singh

    I took the course just for fun and I actually learned a lot! Now I'm curious learning more about game development and techniques. I'm definitely taking anoth...

    Read More

    I took the course just for fun and I actually learned a lot! Now I'm curious learning more about game development and techniques. I'm definitely taking another course from Gustavo!

    Read Less
  • Great course!

    Sebastien Richer

    Amazing source for whoever wants to actually understand raycasters. The lecturer (Gustavo Pezzi) takes the time to go through the logic and each correspondin...

    Read More

    Amazing source for whoever wants to actually understand raycasters. The lecturer (Gustavo Pezzi) takes the time to go through the logic and each corresponding line of code. Visual support is also used to help understand each concept.

    Read Less
  • Excellent course, one of the very best I've gone through

    Arnon Marcus

    The material is walked through very meticulously and methodically, with lots of great visual aids. Every challenging point is identified and delved into app...

    Read More

    The material is walked through very meticulously and methodically, with lots of great visual aids. Every challenging point is identified and delved into appropriately. Most resommended!

    Read Less
  • Awesome tutorial

    George Adrian

    Thank you a lot, the content of the course is very beginner friendly and well done!

    Thank you a lot, the content of the course is very beginner friendly and well done!

    Read Less
  • Very good project, excellent explanations

    Jon Snow

    The course is very helpful, thx !

    The course is very helpful, thx !

    Read Less