dropGrowth

Simulates (water)drop growing by condesation and accretion effect and the downwards movement through gravitation. This movement is not generated by gravitation, but simply follows a function depending on the drop size. Start state is a randomly uniform distributed area of very small droplets (around 2E-6 meters in diameter), where as their size is normal distributed. Parameters of this small program can be set in the src/global.h definition. The OpenCV functionality can also be turned off there, which is needed to visualize the simulation environment and create a small video snip. No logs are produced, some state informations are printed to stdout. Starting parameters are not built in yet.

Build Instructions

Dependencies

OpenCV v4 (can be disabled in src/global.h; for older versions the source code may be adopted)

Configure

Use a out-of-tree build to not pollute your checkout:

mkdir build
cd build

Depending if you want to use a debug or release build, either run

# debugging
cmake -GNinja -DCMAKE_BUILD_TYPE=Debug -DSANITIZE_ADDRESS=On ..

or

# profiling
cmake -GNinja -DCMAKE_BUILD_TYPE=RelWithDebInfo ..

or

# public release
cmake -GNinja -DCMAKE_BUILD_TYPE=Release ..

Actual Build

ninja

Usually, you do NOT need to re-run cmake.

Run

./dropgrowth

Developer Notes

"Height" in the simulaiton is inverted! If the height has a value as defined in ENVIRONMENT_HEIGHT, it means the drop is at the ground (real world). Height = 0 in the program means the drop is at height = ENVIRONMENT_HEIGHT in the real world.

Auto-Format

cd build
ninja format

TODO

• performance improvements (i.e. QuadTree instead of bruteforce)