Lecture 17: Physical Simulation (22)
noah-ku

This slide breaks down how we can create structures using springs in computer simulations. The structure shown is designed to resist shearing, with no preferred directionality, thanks to the uniform arrangement of springs. It’s also engineered to withstand bending out of the plane by including weaker springs (indicated in red), which provide flexibility. This concept is intuitive as it mimics the physical behavior of springs, offering a clear example of how basic physical principles can be applied to create more complex and functional virtual structures in computer graphics and simulation courses.

SuryaTalla22

From the diagram and description, it appears to be the case that the red springs are designed to cause as minimal effect as possible on the lateral motion (as the spring bends rather than stretches). However, the springs are designed to resist out of plane bending to a much higher degree

omijimo

would a structure with every point having a spring to every point be enough to simulate any kind of material, if the spring weights are precise enough?

Alina6618

What are the principles of topology optimization that might be employed to determine the optimal distribution and stiffness of springs (both red and blue) to achieve a desired balance of structural rigidity and flexibility?

michaelwiradharma

It's very interesting to learn that you need a lot more trusses to create a stable structure that resists plane bending from various directions. I remember taking a robotics class when I was younger that taught me that triangles should always be used as a basic building block that can be used to create very strong structures, but this diagram is introducing something new

Songbird94

It reminds me of our mesh project with the cube…

stang085

How much does this implementation affect render time since there are so many more aspects to calculate?

rishiskhare

The diagonal linkages make sense to me conceptually, but I'm a bit confused on how the two-apart red linkages address the out-of-place biases. Do the red linkages ensure the spring-mass system doesn't immediately collapse downwards?

brianqch

I think if we were to translate this to a 3D structure the shearing constraints would also have to be between the diagonals across a "cube" formed from this structure. So a point in the bottom, close, left of a cube should have a spring that connects to several points above, left, right, and diagonally.

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