## Errata

This page contains known errors in the first edition of “Real-Time Volume Graphics”. Errata are separated into important errors (of interest to all readers) and minor errors (likely of interest only to the authors and the publisher).

**Important Errors:**

**p.55:** In Listing (3.4), the function calls to **glAlphaFunc** should be replaced by calls to **glBlendFunc**. [*reported by Charles Rojo and Klaus Mueller, Apr 07*]

**p.116:** In Equation (5.20), the vectors **r **and **v** must be replaced by **n** and **l**. [*reported by Chris Johnson, Dec 06*]

**p.119:** In Listing (5.1), the variable name for the specular exponent **shininess **must be replaced by **n**. [*reported by Kristi Potter, Feb 07*]

**p.121:** In Listing (5.2), in the final return statement replace variabe **lightColor** by **lightIntensity**. [*reported by Patrick O'Leary, Feb 07*]

**p.125:** In Listing (5.4), the lines starting with “result.rgb +=” and “half4 result =” should be swapped. [*Rezk-Salama, Oct 06*]

**p.194:** In Figure (8.3), NPOT and POT must be swapped (the upload bandwidth for NPOT is actually better than for POT). [*Rezk-Salama, Oct 06*]

**p.339:** In Equation (13.12), matrix **A **must be replaced by **H**. [*Rezk-Salama, Oct 06*]

**Minor Errors:**

The dot product notation is not consistent. The notation with angular brackets should be replaced on pages 116 (Eq.5.27) and 132 (Eq. 5.42, 5.43, 5.44, 5.45).

p.xvi: “Charles Hanson” must be replaced by “Charles Hansen” (Sorry for this one, Chuck!)

p.xvi: “Deutsche Forschungsgesellschaft” must be replaced by “Deutsche Forschungsgemeinschaft”.