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
To test this new feature, I propose to draw text over the other layers. I update the text regularly, so we can check that we support dynamic text rendering:
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
To check that the new layer type works fine, I propose to move a character in the level using the arrow keys:
There are no collision checks; the character can go anywhere, as long as it is inside the world. Also, note that the view follows the character.
Continue readingWith 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. I also add keyboard handling to the facade to let the user changes the view.
Continue readingIn this post, we extend the facade to handle several layers. We also see how to draw with transparency.
Continue readingBefore 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.
Continue readingI 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.
Continue readingIn 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.
Continue readingTextures 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.
Continue readingIn this post, I introduce OpenGL textures and use them to draw tiles from tilesets.
Continue readingShaders are one of the powerful features of OpenGL. I introduce them in this post and show how to color vertices using vertex and fragment shaders.
Continue reading