Mjolnir Engine

Mjolnir is a minimalistic, bindless, GPU-driven game engine in Odin + Vulkan 1.3.

Get started

To use Mjolnir, run make shader to compile shaders to SPIR-V and copy the mjolnir/ directory into your project.

Notable features

• Physically-based rendering with IBL
• Cameras, lights, shadows (point / spot / directional, 2D + cubemap)
• Cameras as render targets — sample any camera output as a texture
• Skeletal animation with FK, IK (FABRIK), procedural modifiers
• Animation layering with bone masks, blend modes, transitions
• Procedural animation: tail follow-through, spider legs, path-on-spline
• glTF + OBJ loading
• Particle simulation + force fields
• Billboards, sprites
• Splines, tweens
• Rigid-body physics (tunneling-safe for fast bodies)
• Recast + Detour navigation
• 2D UI: widgets, layout, events, fontstash text
• Render to texture
• Post-process: tonemap, bloom, blur, fog, outline, DoF, crosshatch

Build commands

# Build and run in release mode
make run
# Build and run in debug + Vulkan validation
make debug
# Build only
make build         # release
make build-debug   # debug
# Build all shaders
make shader
# Run all tests
odin test . --all-packages
# Run a single test
odin test . --all-packages -define:ODIN_TEST_NAMES=module_name.test_name

Build flags

Debugging tips

• For visual issues: build with -define:FRAME_LIMIT=10, inspect logs.
• Capture screenshots with make capture.
• Slow the renderer with -define:RENDER_FPS=4 to read render logs frame by frame.
• Toggle engine.debug_ui_enabled = true for the microui overlay.

Read more

• architecture — layer design, frame phases, staging contract, bindless + GPU-driven model
• examples — runnable examples with notes

Module intros