Fried Egg Simulation Technical Summary
ENTRY 2 PROGRESS BLOG
GOAL
FLIP Tests & Animated Material Development
REFERENCES
Egg Yolk Tutorial
Animated Textured Documentation
PROCESS
After consulting with Professor Fowler, I will be switching to using a FLIP simulation rather than MPM and here is my updated priority list:
1. Egg white & Yolk FLIP Sim (Together)
2. Metaballs for surface deformation
3. Pyro for steam
4. Oil FLIP with Egg Sim as Collider
5. (Super Stretch goal: Black pepper/green onion sprinkled)
INITIAL FLIP TESTS
From what I learned from the MPM Fundamentals video for a couple days ago, I set up my FLIP sources like this. I watched the Egg Yolk tutorial to get an idea of how to adjust different material parameters from the same DOP net. Essentially, you can control based on the pre-existing attributes that come with the FLIP solver.
Here is one of my first FLIP tests. I am mainly tweaking the with the density and viscosity attributes to control how much each material spreads.
RESEEDING & DIVERGENCE
Visible in the video above, the geo slowing starts disappearing as you get further in the simulation. After some research, I learned this is a Reseeding issue. I enabled "Reseed Particles" in the FLIP Solver and increased both the Birth and Death threshholds so that the particles don't die too quickly. Enabling Divergence allowed my simulation to retain it's volume.
DRIP ISSUE
One of the immediate issues I see is the shape of the drip before it plops onto the pan. Based on the reference, the whites and yolk are flowing down in a stream rather than the entire egg white and yolk plopping down at once.
To solve this, I created another collider to act as the "egg shell" that the whites drop into before pouring into the pan. In this way, I can also judge the viscosity as it drips down. This collider will not be visible in the final render.
This video shows the solution of both the Reseeding and the Drip issue:
ANIMATED TEXTURE TEST
I used the Python script from Professor Fowler's documentation to test out animated textures on the farm so I already have it set up for later. Here is the test render:
FURTHER FLIP TESTS
I am playing with the viscosity and density values to try to find the right balance. I think the yolk is closer, the white is still gross looking, it is too flowing and has to just "plop"
Trying different ways to make the fluid flow.
1. Egg white & Yolk FLIP Sim (Together)
2. Metaballs for surface deformation
3. Pyro for steam
4. Oil FLIP with Egg Sim as Collider 5. (Super Stretch goal: Black pepper/green onion sprinkled)
To solve this, I created another collider to act as the "egg shell" that the whites drop into before pouring into the pan. In this way, I can also judge the viscosity as it drips down. This collider will not be visible in the final render.