Question

Possible Duplicate:
Using a bitwise & inside an if statement

I have the following piece of code from http://local.wasp.uwa.edu.au/~pbourke/geometry/polygonise/

    if (edgeTable[cubeindex] & 1)
      vertlist[0] =
         VertexInterp(isolevel,grid.p[0],grid.p[1],grid.val[0],grid.val[1]);
   if (edgeTable[cubeindex] & 2)
      vertlist[1] =
         VertexInterp(isolevel,grid.p[1],grid.p[2],grid.val[1],grid.val[2]);

How can i rewrite the if statements so they will run in Java ?

Regards Michael

Answer 1

edgeTable[cubeindex] & 1 is a valid operation in Java and has the same meaning as in C. You can have a look at the Java tutorial on Bitwise and Bit Shift Operators for more information.

But you need to test for an explicit condition in the if statement:

if ((edgeTable[cubeindex] & 1) != 0)