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Why are quaternions used for rotations?
...a 3x3 rotation matrix, the quaternion has the advantage in size (4 scalars vs. 9) and speed (quaternion multiplication is much faster than 3x3 matrix multiplication).
Note that all of these representations of rotations are used in practice. Euler angles use the least memory; matrices use more memor...
What is the meaning of “… …” token? i.e. double ellipsis operator on parameter pack
...
on vs2015 separating comma is essential in the template version:
template <typename T, typename ... U>
struct X<T(U...,...)> {};// this line is the important one
an example instantiation is:
X<int(...
Java GUI frameworks. What to choose? Swing, SWT, AWT, SwingX, JGoodies, JavaFX, Apache Pivot? [close
...en it was almost mature.
You might want to see the discussion about Swing vs. Qt here.
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edited May 23 '17 at 11:33
Community...
What do people find difficult about C pointers? [closed]
...n students' understanding to be the most common source of problems:
Heap vs Stack storage. It is simply stunning how many people do not understand this, even in a general sense.
Stack frames. Just the general concept of a dedicated section of the stack for local variables, along with the reason it...
What is object slicing?
... would just like to add an execution example when passing objects by value vs by reference:
#include <iostream>
using namespace std;
// Base class
class A {
public:
A() {}
A(const A& a) {
cout << "'A' copy constructor" << endl;
}
virtual void run() co...
Looking for a good world map generation algorithm [closed]
...andom motion vector, and should be capable of determining earthquake zones vs volcanic zones, etc. Each point of land would then end up with an individual vector based off its location in relation to the plate boundaries, and should end up with a fairly realistic simulation to work from.
...
Is explicitly closing files important?
...itly? What about when an exception happens (when you use with/try-finally vs. not doing so)?
– user553702
Sep 13 '11 at 0:43
1
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What's the use of Jade or Handlebars when writing AngularJs apps
... I agree with @NickWiggill. Mentally parsing a JADE template vs. raw HTML requires equal 'wetware' cpu time for me. I won't go so far as to say you're unprofessional if you disagree, but to me it's the same thing. @ Philipp, your analogy of parsing C/C++ to assembly being equal to pa...
What data is stored in Ephemeral Storage of Amazon EC2 instance?
...ion [https://aws.amazon.com/premiumsupport/knowledge-center/instance-store-vs-ebs/] instance store volumes is not persistent through instance stops, terminations, or hardware failures.
Any AMI created from instance stored disk doesn't contain data present in instance store so all instances launched...
Why is SSE scalar sqrt(x) slower than rsqrt(x) * x?
...
This is also true for division. MULSS(a,RCPSS(b)) is way faster than DIVSS(a,b). In fact it's still faster even when you increase its precision with a Newton-Raphson iteration.
Intel and AMD both recommend this technique in their optimisation manuals. In applications which don't require IEEE-...