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Category Archives: Tutorial
OpenGL 2D Facade (14): Unicode text
The creation of a tileset for large character sets uses a lot of memory. This post shows an approach based on the Flyweight pattern to allow their usage with minimal memory footprint. This post is part of the OpenGL 2D … Continue reading
OpenGL 2D Facade (13): Text
In this post, I start to address a more advanced topic: text rendering with OpenGL. I first consider a simple case with monospaced fonts and small character sets. This post is part of the OpenGL 2D Facade series Objective To … Continue reading
OpenGL 2D Facade (12): Characters
In this post, I add a new type of layer dedicated to characters. These layers can draw tiles anywhere and updates their OpenGL data every time we render a frame. This post is part of the OpenGL 2D Facade series … Continue reading
OpenGL 2D Facade (11): View and Keyboard
With the previous program, the size of the window depends on the size of the level, which is problematic when the level is large. In this post, I update the shader programs to get a fast translation of the display. … Continue reading
OpenGL 2D Facade (10): Layers
In this post, we extend the facade to handle several layers. We also see how to draw with transparency.
OpenGL 2D Facade (9): Load a level
Before handling the rendering of several layers, we need data to build them. Rather than copy and paste many ids from a Tiled map file, I propose to read them using the TMX library.
OpenGL 2D Facade (8): Facade
I have enough content to start a facade: I refactorize all the code to satisfy the properties of the Facade pattern and get a more robust and extensible implementation.
OpenGL 2D Facade (7): Draw a level
In this post, I show how to draw many tiles from a single-layer level created with Tiled. I also show how to take a screen capture with OpenGL.
OpenGL 2D Facade (6): Draw a tile
Textures in the previous post allow the drawing of tiles, but the aspect ratio is not correct. In this post, I show how to draw a tile on a grid location correctly.
OpenGL 2D Facade (5): Textures
In this post, I introduce OpenGL textures and use them to draw tiles from tilesets.