Update of /cvsroot/bprocessor/model/src/net/sourceforge/bprocessor/model
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv7616
Modified Files:
Vertex.java
Log Message:
method for calculating derterminants
Index: Vertex.java
===================================================================
RCS file: /cvsroot/bprocessor/model/src/net/sourceforge/bprocessor/model/Vertex.java,v
retrieving revision 1.5
retrieving revision 1.6
diff -C2 -d -r1.5 -r1.6
*** Vertex.java 16 Aug 2005 11:45:03 -0000 1.5
--- Vertex.java 30 Aug 2005 13:14:55 -0000 1.6
***************
*** 225,228 ****
--- 225,254 ----
return Math.sqrt(Math.abs(getX() * getX() + getY() * getY() + getZ() * getZ()));
}
+
+ /**
+ * Computes the the determinant of this and to other vertecies.
+ * The form is: determinant{this, v, u}.
+ * @param v the second vertex
+ * @param u the third vertex
+ * @return the determinant.
+ */
+ public double determinant(Vertex v, Vertex u) {
+ double tx = this.getX();
+ double ty = this.getY();
+ double tz = this.getZ();
+
+ double vx = v.getX();
+ double vy = v.getY();
+ double vz = v.getZ();
+
+ double ux = u.getX();
+ double uy = u.getY();
+ double uz = u.getZ();
+
+ double result = tx * ((vy * uz) - (vz * uy));
+ result -= vx * ((ty * uz) - (tz * uy));
+ result += ux * ((ty * vz) - (tz * vy));
+ return result;
+ }
/**
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