1.1.3.0 coordsys.toworldmany

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coordsys.toworldmany - Function

1.1.3 Convert many absolute pixel coordinates to numeric world

Description

This function converts many absolute pixel coordinates to world coordinates. It exists so you can efficiently make many conversions (which would be rather slow if you did them all with toworld). Because speed is the object, the interface is purely in terms of numeric matrices, rather than being able to produce strings and quanta etc. like toworld can.

The units of the output world values are the native units given by function units.

Arguments


Inputs
value	Absolute pixel coordinates
	allowed:	variant
	Default:

Returns
record

Example

"""
#
print "\t----\t toworldmany Ex 1 \t----"
csys = cs.newcoordsys(direction=T, spectral=T)    # 3 axes
rp = csys.referencepixel()[’numeric’];            # reference pixel
pabs = ia.makearray(0,[3,100])              # 100 conversions each of length 3
for i in range(3):
  for j in range(100):
    pabs[i][j] = rp[i]
for ioff in range(100):                     # offset for third axis
  pabs[2][ioff] += ioff;                    # Make spectral axis values change
wabs  = csys.toworldmany (pabs)[’numeric’]; # Convert
print wabs[0][0], wabs[1][0], wabs[2][0]    # First absolute pixel coordinate
#0.0 0.0 1415000000.0
print wabs[0][99], wabs[1][99], wabs[2][99] # 100th absolute pixel coordinate
#0.0 0.0 1415099000.0
#
"""

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