We have measured the splashing behaviors
of 22 different materials that are commonly found in the real world.
These materials can be broadly classified as rough (e.g., wood and
brick), smooth (e.g., marble and glass), flexible (e.g., silk and
paper) and miscellaneous (e.g., water and moss). We have developed a
stochastic model for splash distribution that builds upon empirical
models previously developed in fluid dynamics and meteorology. Our
model is simple and only requires 7 coefficients for generating
splashes for head-on impact for a material. A more general model for
generating splash for arbitrary impact angles (due to surface
inclination or wind) requires 54 coefficients. The models of different
materials may be combined to generate physically plausible splashes for
novel materials that have not been measured. Our model is applicable
for rendering splashes due to rain as well as water drops falling from
large heights such as windowsills, trees, and rooftops. For more details, please refer to the following paper:
"Material Based Splashing of Water Drops,"
K. Garg, G. Krishnan and S.K. Nayar ,
Proceedings of Eurographics Symposium on Rendering,
[PDF] [bib] [©]
Format of database
The coefficients of the splash models of four materials. The splash
coefficients are specified as a row vector in the following order:
(1, α, φ, αφ, α^2, φ^2, α^2φ, φ^2α, α^3, φ^3)
where α is inclination angle and φ is azimuthal angle. The database can be downloaded as a zip file (data_files.zip). The coeff_file_format specifies the format of the coefficient files.
For low angles of inclination (head-on impact), some materials can
produce corona splashes with crowns that appear for a short duration.
The crown can produce noticeable effects when the splashes are viewed
up close. The height and the radius of the crown vary between
materials. We measure these parameters by taking a side-view image of
the crown for each material, such as the one in (a). These measurements
are used to scale the height and radius of the generic 3D crown model
shown in (b) during rendering.
The project page is located here.