cargo run --release --bin dbg -- --gltf-file ../glTF-Sample-Models/2.0/Sponza/glTF/Sponza.gltf --ambient-lightGraphics experimentation with vulkan (mostly contained in trekant/).
Currently supports metallic-roughness PBR as defined by gltf and also shadow mapping for spot & directional lights (WIP).
Free flying camera controls:
- WASD to move.
- Mouse left button drag to look around.
- ESC to pause/resume.
Rendering controls:
- R to reload all shaders
Renders:
- Box
- BoxTextured
- BoxVertexColors
- Cube
- Sponza
from https://github.com/KhronosGroup/glTF-Sample-Models
Two main libs: ram & trekant. Binary dbg is used to run the "engine".
Prototype for integrating specs ECS with trekant vulkan wrapper.
- Transforms are uploaded with push constants.
- Supports two materials: PBR & unlit.
- WIP support for scenes with data/*.ron.rsf files. These can be loaded to get different light conditions.
Descriptor set 0 holds the "engine" data: light matrices, shadow matrices, main camera view data etc, shadow maps. Descriptor set 1 is material-specific.
Initially, the idea was for this to be (yet another) low-level graphics lib wrapping vulkan but with convenient API. I also had the idea that I might support WPGU as a separate backend to run in the browser. As time has passed, I've realized that I mostly want to learn how rendering works rather than abstracting backends so vulkan has leaked a bit more and more out of this lib, which I think is fine. It might move towards becoming less of a wrapper and more of a collection of utils when working with vulkan.
Vulkan tutorial: https://vulkan-tutorial.com/ Vulkano: https://github.com/vulkano-rs/vulkano
Vulkan coordinate system: https://matthewwellings.com/blog/the-new-vulkan-coordinate-system/
Opengl modern: http://in2gpu.com/opengl-3/, http://in2gpu.com/2016/02/26/opengl-fps-camera/
Derivation of matrix for normals: http://www.lighthouse3d.com/tutorials/glsl-12-tutorial/the-normal-matrix/
PBR: https://github.com/moneimne/glTF-Tutorials/tree/master/PBR https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#appendix-b-brdf-implementation
gltf sample viewer: https://github.com/KhronosGroup/glTF-Sample-Viewer/ Includes shader sources and some explanation
Good explanation, mostly from an artists point of view https://academy.substance3d.com/courses/the-pbr-guide-part-1 https://academy.substance3d.com/courses/the-pbr-guide-part-2
gltf: https://github.com/KhronosGroup/glTF-Tutorials/blob/master/gltfTutorial/README.md