Okay, here is the abstract and summary for the provided transcript about the Hazel game engine.
Abstract:
This video serves as an update on the Hazel game engine project after a period of inactivity. The creator discusses the ongoing development, focusing on two key areas: the animation system and a major renderer overhaul. Team member Jim has been advancing the animation system, particularly implementing networked animations with client-side prediction for smoother multiplayer experiences, demonstrated within the context of a "Genesis 3D" MMO remake project. The creator details their work on "Renderer 2025," which involves migrating Hazel's rendering backend from a custom abstraction layer over Vulkan to NVIDIA's open-source NVRHI library. This move aims to simplify cross-API support (Vulkan, DirectX 11/12) and leverage NVRHI's features like automatic resource state tracking. The video explains the previous architecture versus the new NVRHI-based approach and discusses the ongoing considerations regarding shader language support (GLSL vs. HLSL). The creator also calls for community engagement, feedback, volunteers, and Patreon support.
Hazel Game Engine Development Update: Animation & Renderer 2025
00:00:03 Introduction & Project Status: The creator acknowledges the long gap since the last Hazel update video and expresses a desire to return to more consistent work on the engine.
00:00:39 Following Progress: Viewers can track Hazel's development, current tasks, and future plans via the public Miller Note board linked on HazelEngine.com.
00:01:05 Support & Access: The best way to support Hazel is through Patreon (patreon.com/thecherno), with the $10 tier granting immediate source code access via GitHub.
00:01:23 Call for Volunteers: An invitation for developers interested in contributing to Hazel to fill out a form (link in description).
00:01:40 Communication Feedback: The creator asks for viewer input on the best ways to communicate progress (e.g., live streams, edited dev vlogs, update videos like this one).
00:02:13 Animation System Update (Jim's Work): Team member Jim (Zerix) has been working on the animation system, primarily focusing on networking challenges.
00:02:32 Genesis 3D MMO Context: This work is driven by the needs of the ongoing Genesis 3D MMO remake project, which introduced multiplayer networking to Hazel.
00:03:02 Networked Animation Progress: Jim has successfully implemented networked skeletal animation, where triggers sent over the network play animations on remote clients.
00:03:25 Client Prediction: A key improvement is client-side prediction for remote animations, significantly smoothing the visual experience compared to naive networked playback.
00:03:46 Creator's Focus: Renderer 2025: The creator is currently working on a major renderer refactor, dubbed "Renderer 2025".
00:03:53 NVRHI Integration: The core change is moving Hazel's renderer backend to use NVIDIA's NVRHI (Rendering Hardware Interface), an open-source library.
00:04:01 Benefit of NVRHI: This delegates the complexity of supporting multiple graphics APIs (Vulkan, DirectX 11, DirectX 12) to NVRHI, simplifying Hazel's own codebase.
00:04:26 NVRHI Clarifications: NVRHI is fully open source, allowing modifications (e.g., adding Metal support), and works on AMD and Intel GPUs as it utilizes standard APIs like Vulkan and DirectX.
00:05:15 Current Renderer Architecture: Hazel currently uses a custom abstraction layer: generic interface classes (e.g., Pipeline, VertexBuffer) define concepts, while specific backend classes (e.g., VulkanPipeline) provide the implementation using a chosen API (currently only Vulkan).
00:11:17 New Renderer Architecture: The new approach removes the need for Hazel's specific backend classes (like VulkanPipeline). Instead, the main interface classes (e.g., Pipeline) will directly use NVRHI functions and handles (nvrhi::GraphicsPipelineDesc, nvrhi::createGraphicsPipeline, nvrhi::BufferHandle), letting NVRHI manage the API-specific details internally.
00:17:41 Additional NVRHI Benefits: NVRHI offers automatic resource state tracking and barrier placement (potentially fixing existing AMD driver issues) and handles deferred resource destruction.
00:18:32 Shader Language Consideration (GLSL vs. HLSL): The move prompts a discussion on shader languages. HLSL can be compiled directly to SPIR-V (for Vulkan) and DXIL/DXBC (for DirectX). GLSL requires cross-compilation to HLSL (via SPIR-V Cross) to target DirectX, making HLSL potentially simpler to manage across all target APIs. Feedback is requested on whether to drop GLSL support.
00:20:35 Conclusion & Call to Action: The creator wraps up, asking for feedback on the video format and future content, and reiterates the call for Patreon support.
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