Скачать или смотреть Building a 2D primitives library (C++ & SDL2) - Part 5 - Filled triangles

Follow me in this devlog-style series as I develop a library to support the drawing of simple 2D geometric primitive shapes in C++ with the SDL2 library.

If you have been following my videos, you will know that I have been using the SDL2 library for my series on fractals in C++. Whilst basic drawing functionality is provided by SDL2 in the form of functions to draw lines, rectangles and points, there are no functions to draw other shapes, such as circles or triangles. I would like to be able to draw a wider range of geometric primitives, so I set out to build my own library to support this.

Over the last week I have been working on implementing an algorithm to render filled triangles. Although these can already be made using the FilledPoly class that we developed in Episode 3, that method is rather slow because it makes no assumptions about the underlying geometry of the shapes. In this weeks episode I go over an algorithm for drawing triangles specifically that is significantly faster than the FilledPoly method would be for the same shape.

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All the videos in this series:

Building a 2D primitives library (C++ & SDL2)
   • Building a 2D primitives library (C++ & SDL2)  

Building a 2D primitives library (C++ & SDL2) - Part 2 - Faster circles
   • Building a 2D primitives library (C++ & SD...  

Building a 2D primitives library (C++ & SDL2) - Part 3 - Filled polygons
   • Building a 2D primitives library (C++ & SD...  

Building a 2D primitives library (C++ & SDL2) - Part 4 - Simple animation
   • Building a 2D primitives library (C++ & SD...  

Building a 2D primitives library in C++ with SDL2 (Part 6 - Rectangles & Rotations)
   • Building a 2D primitives library (C++ & SD...  

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Other videos that may be of interest:

The episode where I talk about using the SDL2 library:

Cross-platform graphical display with C++ and the SDL library
   • Cross-platform graphical display with C++ ...  

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And the videos from the series on Fractals in C++:

Dragon curves in C++
   • Dragon Curves in C++  

von Koch snowflake in C++ (Part 2):
   • von Koch snowflake in C++ (Part 2)  

von Koch snowflake in C++ (Part 1):
   • von Koch snowflake in C++ (Part 1)  

Turtle graphics in C++ (Part 2):
   • Turtle Graphics in C++ (Part 2)  

Turtle graphics in C++ (Part 1):
   • Turtle graphics in C++