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mirror of https://github.com/MaSzyna-EU07/maszyna.git synced 2026-11-15 14:04:13 +01:00
jerrrrycho 04b55c866a fix(render): alpha to coverage only where it is on, full coverage on flat alpha
Review of the alpha to coverage change for alpha tested surfaces:

- An alpha which is flat over the pixel (fwidth 0) and equal to the opacity
  threshold got a coverage of 0.5, so e.g. opacity 1 on an opaque or DXT1
  texture turned half see-through with multisampling. Without an alpha edge
  in the pixel the plain test decides now: step(opacity, alpha).
- The shaders took the coverage path whenever they were built with
  multisampling, also where alpha to coverage is off (the reflections pass)
  or does nothing (the single-sampled model previews), and grew the cut-outs
  there by about half a pixel. model_ubo gets an alpha_to_coverage flag, set
  together with the GL state, and the shaders keep the plain alpha test
  without it. The previews no longer turn alpha to coverage on. The flag
  takes 4 of the 12 padding bytes after shadow_tone, so the std140 layout and
  the size of the block stay the same.
- The shader validator never set iMultisampling, so it never compiled the
  alpha to coverage branches. Its "features on" configuration uses the
  default of 2 now, on desktop GL and GLES.
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2019-07-09 22:09:37 +02:00

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MaSzyna - Railway vehicle simulator

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MaSzyna executable source code is licensed under the MPL 2.0 and comes with a large pack of free assets under a custom license.

Table of Contents

Getting Started

MaSzyna compiles and runs natively on Linux and Windows. Other platforms are not tested.

Heads-up
Our dev team is small; we keep improving the build process, but issues may still occur. If you get stuck, please ask on the official Discord server.

Prerequisites

For runtime requirements see Minimum Requirements.

1) Software (oldest tested in parentheses)

  • CMake (3.0)

  • make

  • A C++ compiler with C++20 support:

    • Windows: Visual Studio 2022

    • Linux: GCC (12.3.1)

Note: MinGW is currently not supported.

2) Libraries (oldest tested in parentheses)

3) Graphics API

  • OpenGL 3.0 or newer
  • DirectX 12 via NVRHI (optional, Windows only, for Better Renderer)

CMake flags

Flag Meaning
-DCMAKE_BUILD_TYPE=Debug Debug build
-DCMAKE_BUILD_TYPE=Release Release build
-DCMAKE_BUILD_TYPE=RelWithDebInfo Release build with debug symbols
-DWITH_BETTER_RENDERER=ON/OFF Enable/disable NVRHI-based renderer
-DPython3_ROOT_DIR=<path> Root of the Python 3.14 install on Windows (python.exe, Lib, DLLs) for embed/copy steps; on Linux, optional if CMake picks the wrong interpreter

Linux note: WITH_BETTER_RENDERER uses DirectX 12 through NVRHI and is not supported on Linux.

Windows

Install Python 3.14 x64 from python.org and include the optional Python native development feature (headers and .lib for embedding). Pass -DPython3_ROOT_DIR="C:\Path\To\Python314" on the cmake line when you want the layout under that directory used for embedding and for copying Lib / DLLs next to the executable.

AppVeyor CI builds with the worker image’s preinstalled Python at C:/Python314-x64 (see appveyor.yml: -DPython3_ROOT_DIR=...).

# Clone repository with submodules
git clone --recursive https://github.com/MaSzyna-EU07/maszyna.git

cd maszyna

# Init vcpkg
call setup.bat

# Create directory for CMake build files
mkdir build
cd build

# Generate CMake project (replace %CONFIG% with Debug/Release/RelWithDebInfo)
cmake .. -G "Visual Studio 17 2022" -A x64 -DCMAKE_BUILD_TYPE=%CONFIG%

# Build (replace %CONFIG% accordingly)
cmake --build . --config %CONFIG% --parallel

Linux

# Install dependencies (Fedora/RHEL family)
sudo dnf install -y \
  @development-tools \
  cmake \
  mesa-libGL-devel \
  glew-devel \
  glfw-devel \
  python3.14-devel \
  libpng-devel \
  openal-soft-devel \
  luajit-devel \
  libserialport-devel \
  libsndfile-devel \
  gcc \
  g++ \
  wayland-devel \
  wayland-protocols-devel \
  libxkbcommon-devel

# Clone repository with submodules
git clone --recursive https://github.com/MaSzyna-EU07/maszyna.git

cd maszyna

# Create directory for CMake build files
mkdir build
cd build

# Generate Makefiles (NVRHI is not supported on Linux)
cmake .. -DWITH_BETTER_RENDERER=OFF

# Compile using all cores
make -j"$(nproc)"

Tip (Ubuntu/Debian): Package names differ; install equivalent build-essential, libgl1-mesa-dev, libglew-dev, libglfw3-dev, python3.14-dev, libpng-dev, libopenal-dev, libluajit-5.1-dev, libserialport-dev, libsndfile1-dev, and Wayland/X11 dev packages as needed.

Installing

There is no make install yet. Copy the built executable to your MaSzyna installation manually.

  • Output directory: ./bin

  • File name format: eu07_YYYY-MM-DD_<commit>[_d]

    • YYYY-MM-DD – build date

    • <commit> – short commit hash

    • _d – present in Debug builds

If you already have the MaSzyna assets, copy the executable to the install dir. Assets can be downloaded from eu07.pl.

Rainsted on Linux

If Rainsted (a third‑party starter) fails to detect the executable under Linux, you can create a small wrapper script named eu07.exe:

#!/bin/sh
./eu07 "$1" "$2" "$3" "$4" "$5"

If detection still fails, padding the file (with comments) up to ~1 MB may help.

Known Issues

  • GLFW linking – On some systems you must provide the GLFW library path explicitly with -DGLFW3_LIBRARIES.

  • X11/Wayland linking order – Linking order of X11 and related libs can matter.

  • NVRHI on Linux – The NVRHI/"Better Renderer" path targets DirectX 12 and is currently unsupported on Linux.

Support

Minimum requirements

  • OS: Windows 10 64-bit
  • Processor: 2 core at least 2 GHz (e.g. Intel Core i3-2100 / AMD Athlon II X2)
  • RAM: 6 GB RAM
  • Graphics Card: supporting OpenGL 3.3 with at least 1GB VRAM
  • 150 GB of free disk space
  • Sound card supporting OpenAL with stereo
  • Optional COM ports for custom control panel setups.

License

Languages
C++ 70.8%
C 26.8%
HLSL 1.1%
Python 0.5%
GLSL 0.5%
Other 0.3%