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"""
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************************************************************************************
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File : HullGeometry.py
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File Purpose : Define the Class "HullGeometry"
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Class Purpose :
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-> Read the Hull Geometry definition data from the File "Set_HG.dat"
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-> Create the data variables defining the ship Hull Geometry
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-> Create and prepare a "SectionCurves" object for each station
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-> Print the read Data to console
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-> Write the prepared data to "Res_HG.dat"
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App : PyNAT - Python Based Naval Architecture Tools
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Version : 2021a
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Paradigm : Object Oriented Model
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Author : Praveen Kumar Ch
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*************************************************************************************
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"""
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import numpy as np
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import scipy.interpolate as spi
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import matplotlib.pyplot as plt
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from SectionCurves import SectionCurves
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import os
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class HullGeometry:
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# --------------------------------------------------------------------------------------
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# The Constructor
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# Py-NAT 2021a : PRAVEEN KUMAR CH
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# --------------------------------------------------------------------------------------
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def __init__(self,fs):
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self.tol=0.001
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self.readFromFile(fs)
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self.writeToFile(fs)
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#self.printToConsol(fs)
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# --------------------------------------------------------------------------------------
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# --------------------------------------------------------------------------------------
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# Function to Read Hull Geometry Data from file
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# Creates and Prepares SectionCurve Objects
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# Py-NAT 2021a : PRAVEEN KUMAR CH
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# --------------------------------------------------------------------------------------
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def readFromFile(self,fs):
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print("\n\t\t PyNAT: Reading File : ...\\",fs.ihg_path)
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fp=open(fs.ihg_path,"rt")
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lines=fp.readlines()
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fp.close()
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# Reading the Main Dimensions
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nums=lines[1].split("\t")
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self.L=float(nums[0])
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nums=lines[2].split("\t")
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self.B=float(nums[0])
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nums=lines[3].split("\t")
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self.D=float(nums[0])
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nums=lines[4].split("\t")
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self.AP=float(nums[0])
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self.FP=float(nums[1])
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self.MS=(self.AP+self.FP)/2
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x=list()
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y=list()
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z=list()
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c=list()
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nums=lines[5].rstrip("\n").split("\t")
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tx=float(nums[0])
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ty=float(nums[1])
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tz=float(nums[2])
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tc=1
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if(len(nums)>=4):
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if nums[3].count("k"):
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tc=0
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if nums[3].count("b"):
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tc=-1
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x.append(tx)
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y.append(list([ty]))
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z.append(list([tz]))
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c.append(list([tc]))
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# Reading the points and segregating into stations
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# Py-NAT 2021a : PRAVEEN KUMAR CH
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for i in range(6,len(lines),1):
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nums=lines[i].rstrip("\n").split("\t")
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tx=float(nums[0])
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ty=float(nums[1])
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tz=float(nums[2])
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tc=1
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if(len(nums)>=4):
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if nums[3].count("k"):
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tc=0
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if nums[3].count("b"):
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tc=-1
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found=-1
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loc=0
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# check which station to add this point
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for j in range(len(x)):
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delx=tx-x[j]
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if delx>0:
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loc=j+1
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if abs(delx)<=self.tol:
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found=j
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loc=j
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break
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if found<=-1:
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# If the point dosent belong to exisitng station then add new station
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x.insert(loc,tx)
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y.insert(loc,list([ty]))
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z.insert(loc,list([tz]))
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c.insert(loc,list([tc]))
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else:
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# If the point belongs to existing station check were to place it
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for j in range(len(z[loc]),0,-1):
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delz=tz-z[loc][j-1]
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if(delz>self.tol):
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y[loc].insert(j,ty)
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z[loc].insert(j,tz)
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c[loc].insert(j,tc)
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break
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elif(abs(delz)<=self.tol):
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dely=ty-y[loc][j-1]
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if(dely>self.tol):
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y[loc].insert(j,ty)
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z[loc].insert(j,tz)
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c[loc].insert(j,tc)
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break
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elif(abs(dely)<=self.tol):
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break
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# Dealing with Horizontal Lines due to points with same z values
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# Py-NAT 2021a : PRAVEEN KUMAR CH
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for i in range(len(x)):
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# In each station
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for j in range(len(z[i])-1):
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# At each point
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if abs(z[i][j]-z[i][j+1])<=self.tol:
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# If two adjacent points have same z
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z[i][j+1]=z[i][j]+self.tol
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self.nst=len(x)
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self.x=np.array(x)
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self.y=list()
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self.z=list()
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self.c=list()
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self.xms=np.array(range(self.nst))
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self.npts=np.array(range(self.nst))
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for i in range(self.nst):
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self.y.append(np.array(y[i]))
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self.z.append(np.array(z[i]))
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self.c.append(np.array(c[i]))
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self.npts[i]=self.y[i].size
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# Py-NAT 2021a : PRAVEEN KUMAR CH
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print("\n\t\t PyNAT : Preparing Section Curve Spline Fit Data")
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self.secCrv=list()
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for i in range(self.nst):
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ind=np.argsort(self.z[i],axis=0)
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self.z[i]=np.take_along_axis(self.z[i],ind,axis=0)
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self.y[i]=np.take_along_axis(self.y[i],ind,axis=0)
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self.c[i]=np.take_along_axis(self.c[i],ind,axis=0)
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self.c[i][0]=-1
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self.c[i][-1]=-1
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self.secCrv.append(SectionCurves(self.x[i],self.y[i],self.z[i],self.c[i]))
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# Compute X locations form Mid Ship
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self.xms=self.x-self.MS
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# ---------------------------------------------------------------------------------------
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# --------------------------------------------------------------------------------------
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# Function to write prepared hull geometry data to files
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# Py-NAT 2021a : PRAVEEN KUMAR CH
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# --------------------------------------------------------------------------------------
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def writeToFile(self, fs):
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print("\n\t\tPy-NAT: Writing Prepared Hull Geometry Data to File : ...\\",fs.ohg_path)
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if not os.path.exists(fs.sec_dir):
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os.makedirs(fs.sec_dir)
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fp=open(fs.ohg_path,'wt')
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fp.write("\nPy-NAT: Hull Geometry Data")
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# Printing the read data to Console
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fp.write("\nLength =\t%12.4E"%(self.L))
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fp.write("\nBreadth =\t%12.4E"%(self.B))
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fp.write("\nDepth =\t%12.4E"%(self.D))
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fp.write("\nX location of AP =\t%12.4E"%(self.AP))
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fp.write("\nX location of FP =\t%12.4E"%(self.FP))
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fp.write("\nX location of MS =\t%12.4E"%(self.MS))
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fp.write("\nNo of Stations =\t%12.4E"%(self.nst))
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fp.write("\n\n Printing Station Wise Data... \n\n")
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for i in range(self.nst):
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fp.write("\n-----------------------------------------------------------")
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fp.write("\nStation no =\t%12.4E"%(i))
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fp.write("\nX =\t%12.4E"%(self.x[i]))
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fp.write("\nX frm MS =\t%12.4E"%(self.xms[i]))
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fp.write("\nNo of pts =\t%12.4E"%(self.npts[i]))
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fp.write("\n i \t Z \t Y \t C")
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for j in range(self.npts[i]):
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fp.write("\n%4d\t%12.4E\t%12.4E\t%12d"%(j,self.z[i][j],self.y[i][j],self.c[i][j]))
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fp.write("\n\n Total No of Curvelets =%d"%(self.secCrv[i].nCrv))
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for k in range(self.secCrv[i].nCrv):
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fp.write("\n\n The Curve No: %d \t Start index= %10.5f \t End Index= %10.5f \n"%(k,self.secCrv[i].sCrv[k],self.secCrv[i].eCrv[k]))
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fp.write("\nThe Spline curve Fit Y=F(z)")
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tck=self.secCrv[i].y_fz[k]
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fp.write("\nKnots, t=")
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for l in range(len(tck[0])):
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fp.write("%10.5f,"%(tck[0][l]))
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fp.write("\nB-Spline Coeff, c=")
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for l in range(len(tck[1])):
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fp.write("%10.5f,"%(tck[1][l]))
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fp.write("\nDegree, k=")
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fp.write("%10.5f,"%(tck[2]))
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fp.write("\nThe Spline curve Fit ZY=F(z)")
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tck=self.secCrv[i].zy_fz[k]
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fp.write("\nKnots, t=")
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for l in range(len(tck[0])):
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fp.write("%10.5f,"%(tck[0][l]))
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fp.write("\nB-Spline Coeff, c=")
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for l in range(len(tck[1])):
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fp.write("%10.5f,"%(tck[1][l]))
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fp.write("\nDegree, k=")
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fp.write("%10.5f,"%(tck[2]))
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fp.write("\nThe Spline curve Fit YY=F(z)")
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tck=self.secCrv[i].yy_fz[k]
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fp.write("\nKnots, t=")
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for l in range(len(tck[0])):
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fp.write("%10.5f,"%(tck[0][l]))
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fp.write("\nB-Spline Coeff, c=")
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for l in range(len(tck[1])):
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fp.write("%10.5f,"%(tck[1][l]))
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fp.write("\nDegree, k=")
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fp.write("%10.5f,"%(tck[2]))
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fp.write("\nThe Spline curve Fit L=F(z)")
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tck=self.secCrv[i].L_fz[k]
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fp.write("\nKnots, t=")
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for l in range(len(tck[0])):
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fp.write("%10.5f,"%(tck[0][l]))
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fp.write("\nB-Spline Coeff, c=")
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for l in range(len(tck[1])):
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fp.write("%10.5f,"%(tck[1][l]))
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fp.write("\nDegree, k=")
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fp.write("%10.5f,"%(tck[2]))
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fp.close()
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#-------------------------------------------------------------------------------------------------
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# Activate this Section to Plot Each individual Section
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# Py-NAT 2021a : PRAVEEN KUMAR CH
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# for i in range(self.nst):
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# plt.figure(i)
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# zs,ys=self.secCrv[i].getPoints(0.1)
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# plt.plot(ys,zs)
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# plt.plot(self.y[i],self.z[i],'o')
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# xstr = format(self.x[i],"6.3f")
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# istr = format(i,"3d")
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# plt.title("Section @ X="+xstr)
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# plt.xlabel("Y")
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# plt.ylabel("Z")
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# plt.grid(True)
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# plt.axis('equal')
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# #lg=plt.legend(bbox_to_anchor=(1.05, 1))
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# plt.savefig(os.path.join(fs.sec_dir,"Sec_Curv_"+istr+".png"),
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# dpi=300,
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# format='png',
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# bbox_extra_artists=(),
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# bbox_inches='tight')
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# plt.close()
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#-------------------------------------------------------------------------------------------------
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# Plot Section Curves from the Read Points
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for i in range(self.nst):
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plt.figure("Body Plan")
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if(i<self.nst/2):
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zs,ys=self.secCrv[i].getPoints(0.1)
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hstr = format(i,"2d")
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plt.plot(ys,zs,label='Sec:'+hstr)
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plt.plot(self.y[i],self.z[i],'o')
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else:
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zs,ys=self.secCrv[i].getPoints(0.1)
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hstr = format(i,"2d")
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plt.plot(-ys,zs,label='Sec:'+hstr)
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plt.plot(-self.y[i],self.z[i],'o')
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plt.title("Body Plan")
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plt.xlabel("Y")
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plt.ylabel("Z")
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plt.grid(True)
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plt.axis('equal')
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lg=plt.legend(bbox_to_anchor=(1.05, 1))
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plt.savefig(os.path.join(fs.sec_dir,"Body_Plan.png"),
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dpi=300,
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format='png',
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bbox_extra_artists=(lg,),
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bbox_inches='tight')
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# --------------------------------------------------------------------------------------
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# --------------------------------------------------------------------------------------
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# Function to Print the data read from files
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# Py-NAT 2021a : PRAVEEN KUMAR CH
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# --------------------------------------------------------------------------------------
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def printToConsol(self, fs):
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# Printing the read data to Console
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print("Length =\t%12.4E"%(self.L))
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print("Breadth =\t%12.4E"%(self.B))
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print("Depth =\t%12.4E"%(self.D))
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print("X location of AP =\t%12.4E"%(self.AP))
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print("X location of FP =\t%12.4E"%(self.FP))
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print("X location of MS =\t%12.4E"%(self.MS))
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print("No of Stations =\t%12.4E"%(self.nst))
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for i in range(self.nst):
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print("-------------------------------------------------")
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print("Station no =\t%12.4E"%(i))
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print("X =\t%12.4E"%(self.x[i]))
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print("No of pts =\t%12.4E"%(self.npts[i]))
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print(" Z \t Y \t C")
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for j in range(self.npts[i]):
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print("%12.4E\t%12.4E\t%12d"%(self.z[i][j],self.y[i][j],self.c[i][j]))
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for k in range(self.secCrv[i].nCrv):
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print("The Spline curve Fit Y=F(z)")
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print(self.secCrv[i].y_fz[k])
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print("The Spline curve Fit ZY=F(z)")
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print(self.secCrv[i].zy_fz[k])
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print("The Spline curve Fit YY=F(z)")
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print(self.secCrv[i].yy_fz[k])
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print("The Spline curve Fit L=F(z)")
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print(self.secCrv[i].L_fz[k])
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# PLot Section Curves from the Read Points
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plt.figure("Section Curves")
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for i in range(self.nst):
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if(i<self.nst/2):
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zs,ys=self.secCrv[i].getPoints(0.5)
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plt.plot(ys,zs,'g-')
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plt.plot(self.y[i],self.z[i],'bo')
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else:
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zs,ys=self.secCrv[i].getPoints(0.5)
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plt.plot(-ys,zs,'g-')
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plt.plot(-self.y[i],self.z[i],'bo')
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plt.title("The Section Curves")
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plt.xlabel("Y")
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plt.ylabel("Z")
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plt.grid(True)
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plt.savefig(os.path.join(fs.out_dir,"SectionCurves.png"))
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# --------------------------------------------------------------------------------------
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Reference in new issue
Block a user