Maya is a useful tool for visualizing simulation results. However sometimes coordinate systems get messed up when loading in data.

Using A vector for position and a quaternion for rotation we have:

Negate the X direction

maya_pos.x = -original_pos.x;
maya_pos.y =  original_pos.y;
maya_pos.z =  original_pos.z;

Negate the Quaternion’s x component and magnitude

maya_quat.e0 = -original_quat.e0
maya_quat.e1 = -original_quat.e1
maya_quat.e2 =  original_quat.e2
maya_quat.e3 =  original_quat.e3

Maya does not have direct support for quaternions but if you use python you can use the OpenMaya module

import maya.OpenMaya as OpenMaya
...
rotation = OpenMaya.MQuaternion(-e1,e2,e3,-e0);
euler = rotation.asEulerRotation().asVector();

And then use the euler angles as normal, converting them to degrees as needed

This guide assumes a 64 bit architecture First install gcc 4.6.3 using this guide

Compiling GCC 4.6.3

This guide assumes a 64 bit architecture First get gcc 4.6.3

GCC 4.6.3

Extract the tar

tar -xvf gcc-4.6.3.tar.gz

Install wget (required by prequesites command), development tools and 32 bit glibc headers

yum install wget glibc-devel.i686
yum groupinstall "Development Tools"

Enter the directory, download prerequisites and run configure with prefix to set the install directory, change this to your liking

cd gcc-4.6.3/
./contrib/download_prerequisites
./configure --prefix=/usr/local/gcc/4.6.3

A compilation error will result when you run make so either apply the following patch or change the lines modified by the patch

patch -p1 < {/path/to/patch/file}

OR

nano gcc/config/i386/linux-unwind.h

Patch:

--- a/gcc/config/i386/linux-unwind.h	2011-01-03 20:52:22.000000000 +0000
+++ b/gcc/config/i386/linux-unwind.h	2012-07-06 12:23:51.562859470 +0100
@@ -133,9 +133,9 @@
     {
       struct rt_sigframe {
 	int sig;
-	struct siginfo *pinfo;
+	siginfo_t *pinfo;
 	void *puc;
-	struct siginfo info;
+	siginfo_t info;
 	struct ucontext uc;
       } *rt_ = context->cfa;
       /* The void * cast is necessary to avoid an aliasing warning.

Source for fix

The problem seems to only happen when compiling for 64 bit architectures. I have experienced this problem and usually ended up copying data to host before doing the reduce operation.

The fix is very simple, open up:

thrust/detail/backend/cuda/reduce_by_key.inl

Find the line that states:

 typedef typename thrust::iterator_traits<InputIterator1>::difference_type  IndexType;

and change it to:

typedef  unsigned int  IndexType;

Reduce by key should now work on the device.

If you’ve ever wanted automatic code formatting in xcode like that in eclipse, it is entirely possible with an automator workflow and astyle.

first install astyle, if using macports:

sudo port install astyle

Then in our home directory we need to create a .astylerc file. This file defines the style for the code formatting. An example is provided below, for more info refer to the documentation.

Example .astylerc :

style=kr
brackets=attach
delete-empty-lines
keep-one-line-blocks
convert-tabs
indent=spaces=8
indent-namespaces  
indent-classes  
indent-cases  
indent-preprocessor  
break-blocks  
pad-oper
unpad-paren  
pad-header  
align-pointer=name
suffix=nonekr