blitz++

Why doesn't this Blitz++ code compile ?

I'm a blitz++ newbie. So far, so good, but I'm a bit mystified why the commented out line in the code below fails to compile with error: conversion from ‘blitz::_bz_tinyMatExpr<blitz::_bz_tinyMatrixMatrixProduct<double, double, 3, 3, 3, 3, 1, 3, 1> >’ to non-scalar type ‘const m33’ requested I'm on Debian/Lenny (g++ 4.3.2, Blitz 0.9...

Does Blitz++ use BLAS routines when it is possible and appropriate to

I know that Blitz++ gets its performance plus by extensive usage of expression templates and template metaprogramms. But at some point you can't get more out of your code by using these techniques - you have to multiply and sum some floats up. At this point you can get a final performance kick by using the highly optimized (especially fo...

how to use blitz_0.9

I down load blitz_0.9,I can build it in vs2008 and get blitzd.lib and blitz.lib but how can i get blitz.dll who have used it give me some advice thank you. ...

What do the ddx and ddy values do in this AABB ray intersect algorithm?

Does anyone know what the ddx and ddy values do in the AABB ray intersect algorithm? Taken from the following site http://www.blitzbasic.com/codearcs/codearcs.php?code=1029 (show below). Local txmin#,txmax#,tymin#,tymax# // rox, rdx are the ray origin on the x axis, and ray delta on the x axis ... y-axis is roy and rdy Local ddx# =1.0...