Moved code not being used in new code to it's own directory.

code/EldadsCode/getCellVolume.py

@@ -0,0 +1,58 @@
+from sputils import *
+from utils import *
+from sputils import *
+from numpy import *
+from getEdgeTangent import *
+
+
+def volTetra(y, m, I, A, B, C, D):
+
+    a11 = array(y[A, 0]-y[B, 0]); a12 = array(y[A, 0]-y[C, 0]); a13 = array(y[A, 0]-y[D, 0])
+    a21 = array(y[A, 1]-y[B, 1]); a22 = array(y[A, 1]-y[C, 1]); a23 = array(y[A, 1]-y[D, 1])
+    a31 = array(y[A, 2]-y[B, 2]); a32 = array(y[A, 2]-y[C, 2]); a33 = array(y[A, 2]-y[D, 2])
+
+    return abs(a11*a22*a33 + a12*a23*a31 + a13*a21*a32 - a31*a22*a13 - a32*a23*a11 - a33*a21*a12)
+
+
+def getCellVolume(X, Y, Z):
+
+    m = array(shape(X))-1
+    y = hstack3(mkvc(X), mkvc(Y), mkvc(Z))
+
+    i = int64(linspace(0, m[0]-1, m[0]))
+    j = int64(linspace(0, m[1]-1, m[1]))
+    k = int64(linspace(0, m[2]-1, m[2]))
+
+    ii, jj, kk = ndgrid(i, j, k)
+    ii = mkvc(ii)
+    jj = mkvc(jj)
+    kk = mkvc(kk)
+
+    I = int64(sub2ind(m, hstack3(ii, jj, kk)))
+    A = int64(sub2ind(m+1, hstack3(ii, jj, kk)))
+    B = int64(sub2ind(m+1, hstack3(ii, jj+1, kk)))
+    C = int64(sub2ind(m+1, hstack3(ii+1, jj+1, kk)))
+    D = int64(sub2ind(m+1, hstack3(ii+1, jj, kk)))
+    E = int64(sub2ind(m+1, hstack3(ii, jj, kk+1)))
+    F = int64(sub2ind(m+1, hstack3(ii, jj+1, kk+1)))
+    G = int64(sub2ind(m+1, hstack3(ii+1, jj+1, kk+1)))
+    H = int64(sub2ind(m+1, hstack3(ii+1, jj, kk+1)))
+
+    v1 = volTetra(y, m, I, A, B, D, E)
+    v2 = volTetra(y, m, I, B, E, F, G)
+    v3 = volTetra(y, m, I, B, D, E, G)
+    v4 = volTetra(y, m, I, B, C, D, G)
+    v5 = volTetra(y, m, I, D, E, G, H)
+
+    v = 1.0/6.0 * (v1 + v2 + v3 + v4 + v5)
+    return v.flatten()
+
+
+if __name__ == '__main__':
+
+    X, Y, Z = ndgrid(linspace(0, 2, 3), linspace(0, 2, 3), linspace(0, 2, 3))
+    Z[2, 2, 2] = 2.5; Z[0, 0, 0] = -0.5
+    X[2, 2, 2] = 2.5; X[0, 0, 0] = -0.5
+
+    v = getCellVolume(X, Y, Z)
+    print v