Posts about the helios C++23 game framework - architecture, implementation, and technical deep dives
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Over the past few weeks, I’ve been busy refining the helios GameLoop to enable player interactions with various GameObjects. This included, in particular, controlling the player ship, spawning enemies, and - the holy grail of every game - the collision system.
Wrapping up the year with GameObject pooling and a SpawnSystem based on conditions and strategies. On to collision detection! 🕹️ 👾
Merry Christmas - Milestone 3 is out. This one is smaller on flashy visuals but much bigger where it matters: the framework now helps to build gameplay faster. Over the last week I focused on three practical gaps that showed up while iterating on the spaceship demo: clearer system boundaries, easier composition of behavior, and stable, cheap shooting.
Milestone 2 is out. I originally planned to add some camera controls, but ended up rewriting how cameras integrate with the scene graph entirely. Along the way I also built the foundations for the game object system, a bunch of ImGui debug widgets, and a small spaceship demo where you fly around with a gamepad.
Since wrapping up milestone_1 in October, I've been working on tooling and performance infrastructure. The focus has been on frame timing control and debugging capabilities - things you need before scaling up to more complex scenes.
I've published an accompanying technical report on my game framework helios that outlines the key architectural decisions behind the prototype and discuss its further development.
As announced in a previous post, I've made progress on the rendering pipeline. The SceneGraph and RenderPass system are in place now, separating scene graph traversal from the actual rendering commands.
The first abstractions for the rendering model have found their way into helios, and the first example application has already rendered its first primitives onto the screen (aka the Hello World! of 3D Computer Graphics).
de Vries' book on OpenGL is proving (once again) to be very useful, as it provides some common, coarse-grained abstractions that serve as a great starting point for further refinement. Think of separating concerns like Meshes, Materials, and Shaders.
I feel that I've spent most of my recent time with refactoring, restructuring, and developing throwaway prototypes that get discarded every weekend - and that's a good thing. The time between development cycles is currently filled with the intense evaluation of algorithms in digital image processing and reading through Game Engine Architecture by Jason Gregory, which repeatedly provides me with new perspectives.
Continuing from my article on Model Matrix Rotations, I've written about projection matrices - one of the final steps before rasterization.