Transform selection: Difference between revisions
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(New page: == Overview == '''transform_selection''' applies a transformation matrix to a selection. == Example == <source lang="python"> cmd.transform_selection("a", [[x,x,x,x],[x,x,x,x],[x,x,x,x],[...) |
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== Overview == | == Overview == | ||
'''transform_selection''' applies a transformation matrix to a selection. | '''transform_selection''' applies a transformation matrix to a selection. The matrix should actually be passed in as a single list -- not a list of lists. | ||
=== Details === | |||
When '''homogenous == 0''': the matrix needed is a 4x4 matrix, where the upper-left 3x3 quadrant is a typical rotation matrix. The 4th column and 4th row specify the pre- and post-translation vectors. So, you can translate+rotate+translate with this one matrix. | |||
== Example == | == Example == | ||
Revision as of 13:49, 10 March 2008
Overview
transform_selection applies a transformation matrix to a selection. The matrix should actually be passed in as a single list -- not a list of lists.
Details
When homogenous == 0: the matrix needed is a 4x4 matrix, where the upper-left 3x3 quadrant is a typical rotation matrix. The 4th column and 4th row specify the pre- and post-translation vectors. So, you can translate+rotate+translate with this one matrix.
Example
cmd.transform_selection("a", [[x,x,x,x],[x,x,x,x],[x,x,x,x],[x,x,x,x]],
homogenous=1)