Based on the samples found into the directory /opt/vc/src/hello_pi , we programmed an OpenGL ES skeleton which compiles for both x86_64 and Raspberry Pi architectures.

 Thanks to the Assimp library, we are programming a C import of Blender Mesh.

Download the source code, make it and start it with the path to .blend file as the argument.

$ make
Compiling : Done.
Linking : Done.
Ready : ./bin/blenderGL

$ ./bin/blenderGL samples/monkey.blend

Use keys from [1] to [9] to translate;  arrows  [Begin] and [End] to rotate following the 3 axes. The [Esc] key to exit.

Don’t forget to save your Blender Mesh file using the legacy format.

Edit the loop.php and the header.php source files to add the following Javascript code and button into the division of class ″entry-utility″

The success of this script integration with the multilingual plugin qTranslate resides in a PHP call of the function qtrans_getLanguage() whose result, the current site language, is assigned to the variable window.___gcfg

The assembler calculator is enhanced with vector computing.

According to the ARM processor specifications, three operation modes are available:

• scalars
• vectors
• scalars and vectors mixed (our choice)

How do we program this :

• using a vector lenght of 4, the control register FPSCR is loaded with ( 4 – 1 ) × ²↑16
• the registers s8, s9, s10 and s11 are loaded with the first vector operand [a1 a2 a3 a4]
• if the second operand is a vector then the registers s20, s21, s22 and s23 are loaded with [b1 b2 b3 b4] ;
  else, if the operand is a scalar then the register s0 must be used and loaded with b
• the result of the operation in the registers s8, s9, s10 and s11 is stored into [c1 c2 c3 c4]

We pursue programming a calculator for the Raspberry Pi using its vfp coprocessor.

• Screenshot of 173.76 divided by 56.43

• Source code

Using the archlinux ARM distribution for the Raspberry Pi, we were stuck during the yaourt package build with the following error message:

« package architecture is not valid »

Read the forum, the graceful help provided by pepedog leads us to the right solution.

The key answer is CARCH=”armv6h”, change it as soon as possible then update the abs repository.

The argument -A forces the compilation to the armv6h architecture even if the PKGBUILD does only contains arch=(‘i686′ ‘x86_64′)

With constraint modifiers, our previous sample is simplified by letting the compiler choose the registers by itself.

What do we get is a shorter code, handling C variables, plus the power of the assembler language.