Atmosphere and meshing playground. WIP.
TODO:
- Actual atmosphere rendering.
- Move the backend to vulkan (shouldn't be super hard).
- Terrain generation, textures.
- Mesh LOD.
requirements: git, wget, python, internet connection
git clone https://github.com/monomere/pshine --recurse-submodules --shallow-submodules
cd pshine
Note: when cloning, you might get an error that looks something like
fatal: Fetched in submodule path 'vendor/owl', but it did not contain <...>. Direct fetching of that commit failed.
You can ignore it; it's going to be fixed later and doesn't impact anything right now.
You can do the steps below manually, but there's a bash script that does them for you. Make sure to check the contents of the script before running it.
NB: if the script is different from the README, trust the script because I might've forgotten to update the README.
./setup.sh
The graphics backend uses volk and VMA, so after cloning (only once):
wget -P pshine/include/vendor https://raw.githubusercontent.com/zeux/volk/master/volk.h
wget -P pshine/src/vendor https://raw.githubusercontent.com/zeux/volk/master/volk.c
wget -P pshine/include/vendor https://raw.githubusercontent.com/GPUOpen-LibrariesAndSDKs/VulkanMemoryAllocator/master/include/vk_mem_alloc.h
TBD. The shader language compiler (giraffe) uses owl, but it doesn't have a gitignore and doesn't prefix some of the symbols in the generated header. Giraffe is currently in development so this doesn't matter.
The project uses dear_bindings to generate c version of the c++ imgui headers.
mkdir -p pshine/src/vendor/cimgui/
mkdir pshine/src/vendor/cimgui/backends/
python vendor/dear_bindings/dear_bindings.py \
vendor/imgui/imgui.h \
--imgui-include-dir imgui/ \
--backend-include-dir imgui/backends/ \
-t vendor/dear_bindings/src/templates \
-o pshine/src/vendor/cimgui/cimgui
python vendor/dear_bindings/dear_bindings.py \
--backend \
--imgui-include-dir imgui/ \
--backend-include-dir imgui/backends/ \
--imconfig-path vendor/imgui/imgui.h \
-t vendor/dear_bindings/src/templates \
-o pshine/src/vendor/cimgui/backends/cimgui_impl_vulkan \
vendor/imgui/backends/imgui_impl_vulkan.h
python vendor/dear_bindings/dear_bindings.py \
--backend \
--imgui-include-dir imgui/ \
--backend-include-dir imgui/backends/ \
--imconfig-path vendor/imgui/imgui.h \
-t vendor/dear_bindings/src/templates \
-o pshine/src/vendor/cimgui/backends/cimgui_impl_glfw \
vendor/imgui/backends/imgui_impl_glfw.h
requirements: ninja, gcc-compatible c/c++ compiler, glfw, python (optional)
To build (incremental)
ninja
If you edit generate_math.py, ninja will try to regenerate the math.h header, which requires python.
NB: by default, the build.ninja file uses the full LLVM setup with lld, clang, libc++, etc. To use the system-provided stuff change the first line in
build.ninja
to includebuild.system.ninja
instead. Or make your own config if you want to (or need to)!
requirements: vulkan ≥1.2 (i don't really know which version tho uhh)
build/pshine/main
The planet has a radius of 6371km (Earth), the atmosphere has a height of 100km, and the camera moves at 500km/s by default.
Key | Action |
---|---|
F | Switch camera mode (default is arcball) |
Key | Action |
---|---|
A/D | Rotate left/right (yaw) |
W/S | Rotate up/down (pitch) |
X/Z | Zoom in/out |
Key | Action |
---|---|
A/D | Move left/right |
W/S | Move forward/backward |
Shift/Space | Move down/up |
- Use double precision for position data and etc.
- Fake perspective for celestial bodies.
- Fixed point math?
- Bug:
mesh scale is wrongforgot to remove* 5.0f
when passing atmosphere height. -
The bug is still there :(nevermind, it was correct all along.no, its still a bug....- THE BUG IS FIXED IT WORKSSS (precision errors)
- Fix rotation matrices, and matrices in general.
- Rewrite the math library generation, its so ugly.
- Use near-origin coordinates for the "player".
- Velocty reference-frame.
- Unite 2013 - Building a new universe in Kerbal Space Program how ksp does stuff!