Bot Raytracing Anomaly

[cmpitts99]

I have found a possible anomaly with bot raytracing. I have replicated this in both Windows and Linux, using versions 7.26.4 and 7.38.2.

I created a simplified .g file with two plate mode bots and two rpps.

bot1.s has 3 points and 1 triangle (0 0 5) (0 5 -5) (0 -5 -5) thickness = 20, centered about hit point bot2.s has 3 points and 1 triangle (20 0 5) (20 5 -5) (20 -5 -5) thickness = 20, centered about hit point rpp1.s is from -20 to 20, 5.1 to 25.1, -20 to 20 rpp2.s is from -20 to 20, -25.1 to -5.1, -20 to 20

group1 contains bot1.r group2 contains bot1.r and bot2.r group3 contains bot1.r rpp1.r rpp2.r group4 contains bot1.r bot2.r rpp1.r rpp2.r

When shooting a ray down the negative x axis (-1,0,0), group1 will register a hit down to position -1,0,0 When shooting a ray down the negative x axis (-1,0,0), group2 will register a hit down to position -1,0,0 When shooting a ray down the negative x axis (-1,0,0), group3 will register a hit down to position -2,0,0 When shooting a ray down the negative x axis (-1,0,0), group4 will register a hit down to position -9.99,0,0

I have tested several thicknesses for bot1.s and group4 seem to always register a hit just short of the full bot thickness on the negative side.

[brlcad]

@cmpitts99 Thanks for the report. Can you attach your .g file?

[cmpitts99]

TestBot.g.gz