Pixar in a Box
- Start here!
- Introduction to subdivision surfaces
- 1. Split vs. average
- Interactive: Split and average
- 2. Subdivide operation
- 3. Subdividing your own designs
- Interactive: Build your own shape
- 4. Subdivision in 3D
- Interactive: Subdivision in 3D
- Subdivision in 3D
- Getting to know Alonso Martinez
Want to join the conversation?
- So it's almost like making a circle? or just making 4 parabolas?(20 votes)
- It's making four parabolic arcs. They form a smooth shape, but it's not a circle.(11 votes)
- Can you use this stuff to make games?(7 votes)
- Why was the playlist rearranged? Alonso makes references to the "previously learned" material from Environment Modeling but now Environment is four topics after Characters.(5 votes)
- Sorry about that, the topics can be done in any order and we've tried to make it easy to jump around.(7 votes)
- this is getting way more easier to understand thanks for your help everyone of you cool khan guys.(6 votes)
- Which computer apps can I use for subdivision?(3 votes)
- So is this the most efficient type of drawing shapes or are there more?(3 votes)
- Can you guys tell me what is the meaning of intuitive?😁(2 votes)
- intuitive means: using or based on what one feels to be true even without conscious reasoning; instinctive.
"I had an intuitive conviction that there was something unsound in him"(2 votes)
- why can't you make your character on kahn acedomy like see it(2 votes)
- Khan academy makes their own animation then voiceovers their explanation to give you an idea of how to do you're own.(2 votes)
- One of the cool things about splitting and averaging is that it's pretty easy to program. So, you just need to find the midpoint, which is just averaging coordinates. This makes it pretty easy for the people that write our software to create intuitive tools for artists, like myself, to create characters. Kinda like you used on the smiley face. In this next version of the interactive, we've replaced the split and average buttons with a single button, called "Subdivide". Clicking it simply does split followed by average. Focus your attention on this region of the curve. Now, let's extend these lines until they hit the control polygon. Hmm. Doesn't this look, suspiciously, like the string art construction we saw in the parabolic arcs? Now, watch what happens when I subdivide again. The string art pattern continues to emerge. Now, every time you hit subdivide, you get twice as many strings. And that means that the curve that we're creating is a parabolic arc in this region. And there's another parabolic arc over here and over here and over here. But, magically, these four arcs are smoothly blending from one to another. I think that's just so cool. As someone interested in mathematics, this is the kind of surprise that I find exciting. This next exercise will test how well you understand this concept.