implemented vgrids2VTK to surveyUtils

This commit is contained in:
Marcel Paffrath 2015-09-28 10:20:26 +02:00
parent 98df4db95d
commit f7878cdb4a

View File

@ -194,5 +194,115 @@ def findTracesInRanges(shot_dict, distancebin, pickbin):
return shots_found return shots_found
def vgrids2VTK(inputfile = 'vgrids.in', outputfile = 'vgrids.vtk'):
def getDistance(angle):
PI = np.pi
R = 6371.
distance = angle / 180 * (PI * R)
return distance
def readNumberOfPoints(filename):
fin = open(filename, 'r')
vglines = fin.readlines()
nR = int(vglines[1].split()[0])
nTheta = int(vglines[1].split()[1])
nPhi = int(vglines[1].split()[2])
fin.close()
return nR, nTheta, nPhi
def readDelta(filename):
fin = open(filename, 'r')
vglines = fin.readlines()
dR = float(vglines[2].split()[0])
dTheta = float(vglines[2].split()[1])
dPhi = float(vglines[2].split()[2])
fin.close()
return dR, dTheta, dPhi
def readStartpoints(filename):
fin = open(filename, 'r')
vglines = fin.readlines()
sR = float(vglines[3].split()[0])
sTheta = float(vglines[3].split()[1])
sPhi = float(vglines[3].split()[2])
fin.close()
return sR, sTheta, sPhi
def readVelocity(filename):
vel = []; count = 0
fin = open(filename, 'r')
vglines = fin.readlines()
for line in vglines:
count += 1
if count > 4:
vel.append(float(line.split()[0]))
print("Read %d points out of file: %s" %(count - 4, filename))
return vel
R = 6371 # earth radius
outfile = open(outputfile, 'w')
# Theta, Phi in radians, R in km
nR, nTheta, nPhi = readNumberOfPoints(inputfile)
dR, dTheta, dPhi = readDelta(inputfile)
sR, sTheta, sPhi = readStartpoints(inputfile)
vel = readVelocity(inputfile)
nX = nPhi; nY = nTheta; nZ = nR
sZ = sR - R
sX = getDistance(np.rad2deg(sPhi))
sY = getDistance(np.rad2deg(sTheta))
dX = getDistance(np.rad2deg(dPhi))
dY = getDistance(np.rad2deg(dTheta))
xGrid = np.linspace(sX, sX + (dX * nX), nX)
yGrid = np.linspace(sZ, sZ + (nY * dY), nY)
zGrid = np.linspace(sZ, sZ + (nR * dR), nR)
nPoints = len(xGrid) * len(yGrid) * len(zGrid)
# write header
print("Writing header for VTK file...")
outfile.writelines('# vtk DataFile Version 3.1\n')
outfile.writelines('Velocity on FMTOMO vgrids.in points\n')
outfile.writelines('ASCII\n')
outfile.writelines('DATASET POLYDATA\n')
outfile.writelines('POINTS %15d float\n' %(nPoints))
# write coordinates
print("Writing coordinates to VTK file...")
for z in zGrid:
for y in yGrid:
for x in xGrid:
outfile.writelines('%10f %10f %10f \n' %(x, y, z))
outfile.writelines('VERTICES %15d %15d\n' %(nPoints, 2 * nPoints))
# write indices
print("Writing indices to VTK file...")
for index in range(nPoints):
outfile.writelines('%10d %10d\n' %(1, index))
outfile.writelines('POINT_DATA %15d\n' %(nPoints))
outfile.writelines('SCALARS velocity float %d\n' %(1))
outfile.writelines('LOOKUP_TABLE default\n')
# write velocity
print("Writing velocity values to VTK file...")
for velocity in vel:
outfile.writelines('%10f\n' %velocity)
outfile.close()
print("Wrote velocity grid for %d points to file: %s" %(nPoints, outputfile))
return