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Member Since 18 Nov 2008
Offline Last Active Today, 01:30 PM

Posts I've Made

In Topic: Colorimetry: Violet

05 May 2016 - 02:07 PM

Also keep in mind that color is a sensation, a perceptual response to electromagnetic radiation.  It is not a physical property.


Thus you can't say certain wavelengths are violet; you can only say we see these wavelengths as "violet".  

In Topic: In terms of engine technology, what ground is left to break?

03 April 2016 - 01:39 PM

several orders of magnitude, I'm talking between 4x & 10x difference

Wait.  Isn't an order of magnitude 10x?  Or did I learn that wrong?

In Topic: Creating a PRNG input from three values

24 March 2016 - 02:07 PM

What's wrong with just using Perlin/simplex noise?  You can shuffle the permutation table with a PRNG to get different results.

In Topic: MIT: Is it even remotely possible?

11 June 2015 - 04:23 PM

You can check the admission stats here:  http://mitadmissions.org/apply/process/stats


Note that for international students there were 119 admitted out of 3940 who applied (3%).




In Topic: 3d Collision Detection

18 December 2014 - 04:26 PM

I've implemented both approaches.  I was surprised to find that the "intersection method" is far easier to get working in a robust way because it is entirely based on handling overlap.  In the other approach overlap is a failure case that you must prevent.  This becomes tricky when handling contact, i.e., zero distance intersection.


Preventing "pass through" with the intersection method is usually handled by updating an object using substeps of the total time step based on its velocity and bounding volume size.  This impacts performance only for small and fast objects (in which case you can probably get away with raycasting).  


Of course implementing your own collision/dynamics rarely makes sense these days.  I'm assuming you have a good reason for not using Bullet or some other SDK.