2D array

From GeoMod

Many geoscience applications, particularly involving GIS, require working with 2-dimensional arrays. In this example we create a 2-D array of tiles.

from visual import *
from random import uniform

# define parameters
nx = 5
lx = 4.0
nz= 4
lz=4.0

# initialize variables
dx = lx/nx
dz= lz/nz

# create tiles (top left at 0,0,0)
tiles=[]

for i in range (nx):
    for j in range (nz):
        tiles.append(box(length=dx,
                         width=dz,
                         height=.5,
                         color=(uniform(0.5,1),0,0) ))
        tiles[-1].pos.x = 0+i*dx
        tiles[-1].pos.z = 0+j*dz
        #print i,j, tiles[-1].pos

#translate tiles so center of grid is 0,0,0
for i in tiles:
    i.pos.x=i.pos.x-(nx-1)*dx/2.0
    i.pos.z=i.pos.z-(nz-1)*dz/2.0
    print (nx-1)/2.0, (nz-1)/2.0, i.pos

#create axes
xaxis= cylinder(axis=(4,0,0), color=color.red, radius=.05)
yaxis= cylinder(axis=(0,4,0), color=color.blue, radius=.05)
zaxis= cylinder(axis=(0,0,4), color=color.yellow, radius=.05)

The tiles are first laid out with the top left tile at position (0,0,0),