2D ray tracer

*To*: mathgroup at smc.vnet.net*Subject*: [mg99856] 2D ray tracer*From*: jasch at crustal.ucsb.edu*Date*: Sat, 16 May 2009 05:21:34 -0400 (EDT)

Dear group, I am looking for something like a 2D ray tracer. Here is the problem: I have a 2D random field (power spectrum has a decay of 1 or 2, so the field appears not very smooth) of propagation speeds. For a given start point (x0,y0) in the field I want to find for each point (x_i,y-i) the shortest propagation time between (x0,y0) and (x_i,y_i). A typical dimension for the field would be something like 512 x 256. Is anyone aware of a 2D raytracer that could be used to get the shortest travel time for each point? Or does someone maybe have an alternative approach? Preferred would be something non-commercial (free that is) Tank you very much Jan