Ray: Difference between revisions
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====Perspective==== | ====Perspective==== | ||
[[Image:No_persp.png|thumb|200px|center|Example with Perspective Turned Off]] | |||
[[Image:Persp1.png|thumb|200px|center|Example with Perspective Turned On]] | |||
[[Image:Persp2.png|thumb|200px|center|Example with Perspective Turned On and Field of View Set High (70).]] | |||
PyMol 0.97 and prior used '''orthoscopic''' rendering -- that is, no perspective. Upon the arrival of 0.98 and later, we get perspective based rendering at a cost of a 4x decrease in render speed. If you want perspective | PyMol 0.97 and prior used '''orthoscopic''' rendering -- that is, no perspective. Upon the arrival of 0.98 and later, we get perspective based rendering at a cost of a 4x decrease in render speed. If you want perspective | ||
set orthoscopic, off | set orthoscopic, off | ||
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set field_of_view, X | set field_of_view, X | ||
where 50<X<70. Default is 20. 50-70 gives a very strong perspective effect. Nb. the field of view is in Y, not X as one would expect. | where 50<X<70. Default is 20. 50-70 gives a very strong perspective effect. Nb. the field of view is in Y, not X as one would expect. | ||
====Renderer==== | ====Renderer==== | ||
renderer = -1 is default (use value in ray_default_renderer) | renderer = -1 is default (use value in ray_default_renderer) | ||
Revision as of 11:31, 30 May 2005
DESCRIPTION
"ray" creates a ray-traced image of the current frame. This can take some time (up to several minutes, depending on image complexity).
USAGE
ray [width,height [,renderer [,angle [,shift ]]]
angle and shift can be used to generate matched stereo pairs
EXAMPLES
ray ray 1024,768 ray renderer=0
PYMOL API
cmd.ray(int width,int height,int renderer=-1,float shift=0)
NOTES
Perspective
PyMol 0.97 and prior used orthoscopic rendering -- that is, no perspective. Upon the arrival of 0.98 and later, we get perspective based rendering at a cost of a 4x decrease in render speed. If you want perspective
set orthoscopic, off
Otherwise
set orthoscopic, on
To magnify the effect of perspective on the scene,
set field_of_view, X
where 50<X<70. Default is 20. 50-70 gives a very strong perspective effect. Nb. the field of view is in Y, not X as one would expect.
Renderer
renderer = -1 is default (use value in ray_default_renderer) renderer = 0 uses PyMOL's internal renderer renderer = 1 uses PovRay's renderer. This is Unix-only and you must have "x-povray" in your path. It utilizes two temporary files: "tmp_pymol.pov" and "tmp_pymol.png".
SEE ALSO
"help faster" for optimization tips with the builtin renderer. "help povray" for how to use PovRay instead of PyMOL's built-in ray-tracing engine.
USER Comments
How do I ray trace a publication-ready (~300dpi) image using PyMol?
This answer is in the Advanced Issues (Image Manipulation Section).