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Mathematical modelling and computer animation. Animation of chocolate flow on complex surface. Martin Madaras. Intro. Fountain model Real flow Flow simulation Fluid mesh Rendering. Fountain model. 3D Studio Max Low-res for simulation, High-res for rendering. Real flow. - PowerPoint PPT Presentation
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Mathematical modelling and Mathematical modelling and computer animationcomputer animation
Animation of chocolate flow on complex surface
Martin Madaras
IntroIntro
Fountain modelReal flowFlow simulationFluid meshRendering
Fountain modelFountain model 3D Studio Max Low-res for simulation, High-res for rendering
Real flowReal flow Next Limit, authors of renderer Maxwell (using
metropolis light transport algorithm for global illuminance computation), more correct than other renderers
Disadvantages : Very long rendering time, preview can be made at the moment, but is very noisy
XFlow and RealFlow, RealFlow is used in entertainment industry, XFlow in science and technology
RealFlow is standalone app, for simulation only (fluid, gas, rigid bodies)
Rendering must be made in other programs 3DS Max, Blender,...
Fluid meshFluid mesh
Flow simulation 1Flow simulation 1 World in program RealFlow is simuluted with Deamons,
which affect behavior of material (gravitation, noisefield, vortex…)
There are also Kill Deamons, which can delete particles when they satisfy some conditions (particles are out of camera frustrum, velocity is too high, particle has no neighbours in some range)
Geometry can be imported, all faces should be triangles (for better computation)
Chocolate has high viscosity and surface tension, these parameters affect time of computation (number of particles had to be lowered)
CPU : 4core q6600, time necessary for simulation of 1100 frames was 11 hours
Flow simulation 2Flow simulation 2 2 phases of simulation. In first is simulation made on
particles (number based on emiter settings)
In second, mesh is created over particles ( Blob Meshes)
Afterwards, mesh can be exported for every frame and imported into another program via plugin. Mesh behaves as normal object
Flow simulation computation is very expensive
Import via next limit Import via next limit pluginplugin
Lighting and cameraLighting and camera
Camera path is ellipsoid spiral spline
Rendered with VRay render, Indirect illumination calcualtion
Lighting made via HDRI map of interior
Rendering and Rendering and postprocessingpostprocessing
Fountain model was surrouned by cylinder panoramatic photo of chocolate shop. Panoramatic photo was blured for better look
Frames joined in open source software Virtual dub and exported into avi, coded with H.264 divx codec
ImagesImages