Hi all, I am trying to make a nice volume rendering, and am having some trouble. My camera commands are: tf = ColorTransferFunction((-29,-24)) tf.add_layers(8,w=0.1,colormap="Hue Sat Value 2") tf.sample_colormap(-26.5,w=0.02,colormap="Hue Sat Value 2") cam = pf.h.camera([0.0,2.,1.8],[0.0,-1.0,-0.2],4.0,512,tf) cam.show() I will attach the image, also (v11). First, when I use add_layers, can I get yt to print out WHERE the layers are? Second, but related, when I just use add_layers I only see the higher density gas. I have to add sample_colormap to see lower density gas (the blue stuff). Compare v11 to v6 to see what I am talking about. Thanks! Stephanie
My guess is that you need to play with the alpha values when you add_layers. From the docs, if you don't supply alpha, it is: "The alpha value height for each Gaussian. If not supplied, it is calculated as the logspace between -2.0 and 0.0" so it looks like the last value you add will have alpha = 1, i.e. opaque. On Fri, May 23, 2014 at 10:57 AM, Stephanie Tonnesen <stonnes@gmail.com>wrote:
Hi all,
I am trying to make a nice volume rendering, and am having some trouble. My camera commands are: tf = ColorTransferFunction((-29,-24)) tf.add_layers(8,w=0.1,colormap="Hue Sat Value 2") tf.sample_colormap(-26.5,w=0.02,colormap="Hue Sat Value 2") cam = pf.h.camera([0.0,2.,1.8],[0.0,-1.0,-0.2],4.0,512,tf) cam.show()
I will attach the image, also (v11). First, when I use add_layers, can I get yt to print out WHERE the layers are? Second, but related, when I just use add_layers I only see the higher density gas. I have to add sample_colormap to see lower density gas (the blue stuff). Compare v11 to v6 to see what I am talking about.
Thanks!
Stephanie
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-- Michael Zingale Associate Professor Dept. of Physics & Astronomy • Stony Brook University • Stony Brook, NY 11794-3800 *phone*: 631-632-8225 *e-mail*: Michael.Zingale@stonybrook.edu *web*: http://www.astro.sunysb.edu/mzingale
You might also find the TransferFunctionHelper to be useful: http://yt-project.org/docs/dev/visualizing/volume_rendering.html#transferfun... On Friday, May 23, 2014, Michael Zingale <michael.zingale@stonybrook.edu> wrote:
My guess is that you need to play with the alpha values when you add_layers. From the docs, if you don't supply alpha, it is:
"The alpha value height for each Gaussian. If not supplied, it is calculated as the logspace between -2.0 and 0.0"
so it looks like the last value you add will have alpha = 1, i.e. opaque.
On Fri, May 23, 2014 at 10:57 AM, Stephanie Tonnesen <stonnes@gmail.com<javascript:_e(%7B%7D,'cvml','stonnes@gmail.com');>
wrote:
Hi all,
I am trying to make a nice volume rendering, and am having some trouble. My camera commands are: tf = ColorTransferFunction((-29,-24)) tf.add_layers(8,w=0.1,colormap="Hue Sat Value 2") tf.sample_colormap(-26.5,w=0.02,colormap="Hue Sat Value 2") cam = pf.h.camera([0.0,2.,1.8],[0.0,-1.0,-0.2],4.0,512,tf) cam.show()
I will attach the image, also (v11). First, when I use add_layers, can I get yt to print out WHERE the layers are? Second, but related, when I just use add_layers I only see the higher density gas. I have to add sample_colormap to see lower density gas (the blue stuff). Compare v11 to v6 to see what I am talking about.
Thanks!
Stephanie
_______________________________________________ yt-users mailing list yt-users@lists.spacepope.org<javascript:_e(%7B%7D,'cvml','yt-users@lists.spacepope.org');> http://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org
-- Michael Zingale Associate Professor
Dept. of Physics & Astronomy • Stony Brook University • Stony Brook, NY 11794-3800 *phone*: 631-632-8225 *e-mail*: Michael.Zingale@stonybrook.edu<javascript:_e(%7B%7D,'cvml','Michael.Zingale@stonybrook.edu');> *web*: http://www.astro.sunysb.edu/mzingale
Hi Michael and Nathan, Thanks for the help! Michael, everywhere I have been looking in the documentation it says for alpha: "The alpha value height for each Gaussian. If not supplied, it is set as 1.0 everywhere." ( http://yt-project.org/docs/dev/reference/api/generated/yt.visualization.volu...) Can you send me a link to what you are referring to so I can try and figure out which applies? Nathan, that is what I get for not scrolling to the bottom of the page! I will play around with this. -Stephanie On Fri, May 23, 2014 at 11:09 AM, Michael Zingale < michael.zingale@stonybrook.edu> wrote:
My guess is that you need to play with the alpha values when you add_layers. From the docs, if you don't supply alpha, it is:
"The alpha value height for each Gaussian. If not supplied, it is calculated as the logspace between -2.0 and 0.0"
so it looks like the last value you add will have alpha = 1, i.e. opaque.
On Fri, May 23, 2014 at 10:57 AM, Stephanie Tonnesen <stonnes@gmail.com>wrote:
Hi all,
I am trying to make a nice volume rendering, and am having some trouble. My camera commands are: tf = ColorTransferFunction((-29,-24)) tf.add_layers(8,w=0.1,colormap="Hue Sat Value 2") tf.sample_colormap(-26.5,w=0.02,colormap="Hue Sat Value 2") cam = pf.h.camera([0.0,2.,1.8],[0.0,-1.0,-0.2],4.0,512,tf) cam.show()
I will attach the image, also (v11). First, when I use add_layers, can I get yt to print out WHERE the layers are? Second, but related, when I just use add_layers I only see the higher density gas. I have to add sample_colormap to see lower density gas (the blue stuff). Compare v11 to v6 to see what I am talking about.
Thanks!
Stephanie
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-- Michael Zingale Associate Professor
Dept. of Physics & Astronomy • Stony Brook University • Stony Brook, NY 11794-3800 *phone*: 631-632-8225 *e-mail*: Michael.Zingale@stonybrook.edu *web*: http://www.astro.sunysb.edu/mzingale
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Looks like google turned up an older version of the docs, you are right, the latest yt sets alpha to 1. On Sat, May 24, 2014 at 4:00 PM, Stephanie Tonnesen <stonnes@gmail.com>wrote:
Hi Michael and Nathan,
Thanks for the help! Michael, everywhere I have been looking in the documentation it says for alpha: "The alpha value height for each Gaussian. If not supplied, it is set as 1.0 everywhere." ( http://yt-project.org/docs/dev/reference/api/generated/yt.visualization.volu...) Can you send me a link to what you are referring to so I can try and figure out which applies?
Nathan, that is what I get for not scrolling to the bottom of the page! I will play around with this.
-Stephanie
On Fri, May 23, 2014 at 11:09 AM, Michael Zingale < michael.zingale@stonybrook.edu> wrote:
My guess is that you need to play with the alpha values when you add_layers. From the docs, if you don't supply alpha, it is:
"The alpha value height for each Gaussian. If not supplied, it is calculated as the logspace between -2.0 and 0.0"
so it looks like the last value you add will have alpha = 1, i.e. opaque.
On Fri, May 23, 2014 at 10:57 AM, Stephanie Tonnesen <stonnes@gmail.com>wrote:
Hi all,
I am trying to make a nice volume rendering, and am having some trouble. My camera commands are: tf = ColorTransferFunction((-29,-24)) tf.add_layers(8,w=0.1,colormap="Hue Sat Value 2") tf.sample_colormap(-26.5,w=0.02,colormap="Hue Sat Value 2") cam = pf.h.camera([0.0,2.,1.8],[0.0,-1.0,-0.2],4.0,512,tf) cam.show()
I will attach the image, also (v11). First, when I use add_layers, can I get yt to print out WHERE the layers are? Second, but related, when I just use add_layers I only see the higher density gas. I have to add sample_colormap to see lower density gas (the blue stuff). Compare v11 to v6 to see what I am talking about.
Thanks!
Stephanie
_______________________________________________ yt-users mailing list yt-users@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org
-- Michael Zingale Associate Professor
Dept. of Physics & Astronomy • Stony Brook University • Stony Brook, NY 11794-3800 *phone*: 631-632-8225 *e-mail*: Michael.Zingale@stonybrook.edu *web*: http://www.astro.sunysb.edu/mzingale
_______________________________________________ yt-users mailing list yt-users@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org
_______________________________________________ yt-users mailing list yt-users@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org
-- Michael Zingale Associate Professor Dept. of Physics & Astronomy • Stony Brook University • Stony Brook, NY 11794-3800 *phone*: 631-632-8225 *e-mail*: Michael.Zingale@stonybrook.edu *web*: http://www.astro.sunysb.edu/mzingale
participants (3)
-
Michael Zingale -
Nathan Goldbaum -
Stephanie Tonnesen