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From: Zhong R. <re...@uc...> - 2009-12-13 03:20:44
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Please consider the following script that draws a sphere. Why the rotation center is not at the center of the sphere, when the graphics is spun by the mouse? If I change to "set xrange [ 6 : 44]", the rotation center becomes the center of the sphere. This makes the behavior of one of my large applications unpredictable. Is there a way to specify the rotation center? If not, how is the center selected by Gnuplot? set terminal x11 0 size 1024,1024 set parametric set view equal xyz set xlabel "x" set ylabel "y" set zlabel "z" set xrange [ 6 : 43] set yrange [80 : 118] set zrange [13 : 51] set pm3d implicit at s splot 10*cos(u)*cos(v)+25,10*cos(u)*sin(v)+99,10*sin(u)+33 Thanks for your help. Zhong |
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From: Hans-Bernhard B. <HBB...@t-...> - 2009-12-13 10:52:10
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Zhong Ren wrote: > Please consider the following script that draws a sphere. Why > the rotation center is not at the center of the sphere, when > the graphics is spun by the mouse? Why should it be? Did you really expect gnuplot to have a special rule like "whenever there is exactly one spherical surface among the plotted things, rotation will magically center around that"? > If not, how is the center selected by Gnuplot? Mouse rotates the entire graph box, so, kind-of obviously, it is centered around the center of the graph box. So if you want rotation to be around a particular point, make all three axis ranges symmetric around it: set xrange [mid_x - size_x : mid_x + size_x] # likewise for y and z |
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From: Zhong R. <re...@uc...> - 2009-12-13 19:23:04
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---- Original message ---- >Date: Sun, 13 Dec 2009 11:51:41 +0100 >From: Hans-Bernhard Bröker <HBB...@t-...> >Subject: Re: [Gnuplot-info] rotation center >To: re...@uc... >Cc: gnu...@li... > >Zhong Ren wrote: >> Please consider the following script that draws a sphere. Why >> the rotation center is not at the center of the sphere, when >> the graphics is spun by the mouse? > >Why should it be? Did you really expect gnuplot to have a special rule >like "whenever there is exactly one spherical surface among the plotted >things, rotation will magically center around that"? No, you didn't get my question. Please consider my original case again: Please consider the following script that draws a sphere. Why the rotation center is not at the center of the sphere, when the graphics is spun by the mouse? If I change to "set xrange [ 6 : 44]", the rotation center becomes the center of the sphere. This makes the behavior of one of my large applications unpredictable. Is there a way to specify the rotation center? If not, how is the center selected by Gnuplot? set terminal x11 0 size 1024,1024 set parametric set view equal xyz set xlabel "x" set ylabel "y" set zlabel "z" set xrange [ 6 : 43] set yrange [80 : 118] set zrange [13 : 51] set pm3d implicit at s splot 10*cos(u)*cos(v)+25,10*cos(u)*sin(v)+99,10*sin(u)+33 The rotation center is indeed at the spherical center when xrange is [ 6 : 44], because (6+44)/2 = 25, which is exactly the spherical center. When xrange is [ 6 : 43], the rotation center should be (6+43)/2 = 24.5, but it is not. It is near x=33. What makes Gnuplot to select the rotation center? > >> If not, how is the center selected by Gnuplot? > >Mouse rotates the entire graph box, so, kind-of obviously, it is >centered around the center of the graph box. So if you want rotation to >be around a particular point, make all three axis ranges symmetric >around it: > > set xrange [mid_x - size_x : mid_x + size_x] > # likewise for y and z > This is what I thought, but it is not working for me as the example I gave above. Gnuplot seems to have a complex rule to select the rotation center. I really prefer a user selected rotation center. |
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From: Thomas S. <t.s...@fz...> - 2009-12-14 13:02:58
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seems that you are using gnuplot version 4.2.5 in versions >= 4.2.6 this bug has been corrected. renzresearch wrote: > > > > ---- Original message ---- >>Date: Sun, 13 Dec 2009 11:51:41 +0100 >>From: Hans-Bernhard Bröker <HBB...@t-...> >>Subject: Re: [Gnuplot-info] rotation center >>To: re...@uc... >>Cc: gnu...@li... >> >>Zhong Ren wrote: >>> Please consider the following script that draws a sphere. Why >>> the rotation center is not at the center of the sphere, when >>> the graphics is spun by the mouse? >> >>Why should it be? Did you really expect gnuplot to have a > special rule >>like "whenever there is exactly one spherical surface among > the plotted >>things, rotation will magically center around that"? > > No, you didn't get my question. Please consider my original > case again: > > Please consider the following script that draws a sphere. Why > the rotation center is not at the center of the sphere, when > the graphics is spun by the mouse? If I change to "set xrange > [ 6 : 44]", the rotation center becomes the center of the > sphere. This makes the behavior of one of my large > applications unpredictable. Is there a way to specify the > rotation center? If not, how is the center selected by Gnuplot? > > set terminal x11 0 size 1024,1024 > set parametric > set view equal xyz > set xlabel "x" > set ylabel "y" > set zlabel "z" > set xrange [ 6 : 43] > set yrange [80 : 118] > set zrange [13 : 51] > set pm3d implicit at s > splot 10*cos(u)*cos(v)+25,10*cos(u)*sin(v)+99,10*sin(u)+33 > > The rotation center is indeed at the spherical center when > xrange is [ 6 : 44], because (6+44)/2 = 25, which is exactly > the spherical center. When xrange is [ 6 : 43], the rotation > center should be (6+43)/2 = 24.5, but it is not. It is near > x=33. What makes Gnuplot to select the rotation center? > >> >>> If not, how is the center selected by Gnuplot? >> >>Mouse rotates the entire graph box, so, kind-of obviously, it is >>centered around the center of the graph box. So if you want > rotation to >>be around a particular point, make all three axis ranges > symmetric >>around it: >> >> set xrange [mid_x - size_x : mid_x + size_x] >> # likewise for y and z >> > > This is what I thought, but it is not working for me as the > example I gave above. Gnuplot seems to have a complex rule to > select the rotation center. I really prefer a user selected > rotation center. > ------------------------------------------------------------------------------ > Return on Information: > Google Enterprise Search pays you back > Get the facts. > http://p.sf.net/sfu/google-dev2dev > _______________________________________________ > gnuplot-info mailing list > gnu...@li... > https://lists.sourceforge.net/lists/listinfo/gnuplot-info > > -- View this message in context: http://old.nabble.com/rotation-center-tp26763320p26777376.html Sent from the Gnuplot - User mailing list archive at Nabble.com. |
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From: Thomas S. <t.s...@fz...> - 2009-12-14 16:50:18
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in addition you should set: set samp 25,10 set iso 10,20 set urange [-pi:pi] set vrange [0:pi] set pm3d at s ftriangles depthorder hidden3d 100 unset surf this makes the sphere look much better. renzresearch wrote: > > > > ---- Original message ---- >>Date: Sun, 13 Dec 2009 11:51:41 +0100 >>From: Hans-Bernhard Bröker <HBB...@t-...> >>Subject: Re: [Gnuplot-info] rotation center >>To: re...@uc... >>Cc: gnu...@li... >> >>Zhong Ren wrote: >>> Please consider the following script that draws a sphere. Why >>> the rotation center is not at the center of the sphere, when >>> the graphics is spun by the mouse? >> >>Why should it be? Did you really expect gnuplot to have a > special rule >>like "whenever there is exactly one spherical surface among > the plotted >>things, rotation will magically center around that"? > > No, you didn't get my question. Please consider my original > case again: > > Please consider the following script that draws a sphere. Why > the rotation center is not at the center of the sphere, when > the graphics is spun by the mouse? If I change to "set xrange > [ 6 : 44]", the rotation center becomes the center of the > sphere. This makes the behavior of one of my large > applications unpredictable. Is there a way to specify the > rotation center? If not, how is the center selected by Gnuplot? > > set terminal x11 0 size 1024,1024 > set parametric > set view equal xyz > set xlabel "x" > set ylabel "y" > set zlabel "z" > set xrange [ 6 : 43] > set yrange [80 : 118] > set zrange [13 : 51] > set pm3d implicit at s > splot 10*cos(u)*cos(v)+25,10*cos(u)*sin(v)+99,10*sin(u)+33 > > The rotation center is indeed at the spherical center when > xrange is [ 6 : 44], because (6+44)/2 = 25, which is exactly > the spherical center. When xrange is [ 6 : 43], the rotation > center should be (6+43)/2 = 24.5, but it is not. It is near > x=33. What makes Gnuplot to select the rotation center? > >> >>> If not, how is the center selected by Gnuplot? >> >>Mouse rotates the entire graph box, so, kind-of obviously, it is >>centered around the center of the graph box. So if you want > rotation to >>be around a particular point, make all three axis ranges > symmetric >>around it: >> >> set xrange [mid_x - size_x : mid_x + size_x] >> # likewise for y and z >> > > This is what I thought, but it is not working for me as the > example I gave above. Gnuplot seems to have a complex rule to > select the rotation center. I really prefer a user selected > rotation center. > ------------------------------------------------------------------------------ > Return on Information: > Google Enterprise Search pays you back > Get the facts. > http://p.sf.net/sfu/google-dev2dev > _______________________________________________ > gnuplot-info mailing list > gnu...@li... > https://lists.sourceforge.net/lists/listinfo/gnuplot-info > > -- View this message in context: http://old.nabble.com/rotation-center-tp26763320p26779919.html Sent from the Gnuplot - User mailing list archive at Nabble.com. |
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From: Zhong R. <re...@uc...> - 2009-12-14 19:22:39
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Thank you Thomas,
The sphere was just an example. It is not what I want to
draw. The following script is closer to my real case, which
draws a triangle and a quadrangle. depthorder is used, but
the quadrangle is always in the foreground and the triangle is
always in the background. Does the option depthorder mean the
drawing order is sorted?
Zhong
set terminal x11 0 size 1024,1024
set view equal xyz
unset surface
unset contour
set xlabel "x"
set xrange [ 6.31720 : 43.9094 ] noreverse nowriteback
set ylabel "y"
set yrange [ 80.5847 : 118.177 ] noreverse nowriteback
set zlabel "z"
set zrange [ 13.7818 : 51.3741 ] noreverse nowriteback
set pm3d implicit at s
set pm3d depthorder
set pm3d interpolate 1,1 flush begin ftriangles hidden3d 100
corners2color mean
set palette defined ( 0 0.8275 0.8275 0.8275, 0.1667 0.6275
0.1255 0.9412, 0.5 1 0.498 0.3137,\
0.8333 1 1 0, 1 0.5647 0.9333 0.5647 )
splot '-' u 1:2:3:4
14.7151 89.5297 25.4546 0
14.7151 89.5297 25.4546 0
14.807 87.5368 24.2974 0
16.5296 89.0361 24.1387 0
20.3047 93.7361 25.7469 0
22.1518 92.287 25.0393 0.0215407
21.1107 92.4429 25.874 0.0188149
22.9446 91.0527 24.9673 0.0366333
e
---- Original message ----
>Date: Mon, 14 Dec 2009 08:50:07 -0800 (PST)
>From: Thomas Sefzick <t.s...@fz...>
>Subject: Re: [Gnuplot-info] rotation center
>To: gnu...@li...
>
>
>in addition you should set:
>
>set samp 25,10
>set iso 10,20
>set urange [-pi:pi]
>set vrange [0:pi]
>set pm3d at s ftriangles depthorder hidden3d 100
>unset surf
>
>this makes the sphere look much better.
>
>
>renzresearch wrote:
>>
>>
>>
>> ---- Original message ----
>>>Date: Sun, 13 Dec 2009 11:51:41 +0100
>>>From: Hans-Bernhard Bröker <HBB...@t-...>
>>>Subject: Re: [Gnuplot-info] rotation center
>>>To: re...@uc...
>>>Cc: gnu...@li...
>>>
>>>Zhong Ren wrote:
>>>> Please consider the following script that draws a sphere.
Why
>>>> the rotation center is not at the center of the sphere, when
>>>> the graphics is spun by the mouse?
>>>
>>>Why should it be? Did you really expect gnuplot to have a
>> special rule
>>>like "whenever there is exactly one spherical surface among
>> the plotted
>>>things, rotation will magically center around that"?
>>
>> No, you didn't get my question. Please consider my original
>> case again:
>>
>> Please consider the following script that draws a sphere. Why
>> the rotation center is not at the center of the sphere, when
>> the graphics is spun by the mouse? If I change to "set xrange
>> [ 6 : 44]", the rotation center becomes the center of the
>> sphere. This makes the behavior of one of my large
>> applications unpredictable. Is there a way to specify the
>> rotation center? If not, how is the center selected by
Gnuplot?
>>
>> set terminal x11 0 size 1024,1024
>> set parametric
>> set view equal xyz
>> set xlabel "x"
>> set ylabel "y"
>> set zlabel "z"
>> set xrange [ 6 : 43]
>> set yrange [80 : 118]
>> set zrange [13 : 51]
>> set pm3d implicit at s
>> splot 10*cos(u)*cos(v)+25,10*cos(u)*sin(v)+99,10*sin(u)+33
>>
>> The rotation center is indeed at the spherical center when
>> xrange is [ 6 : 44], because (6+44)/2 = 25, which is exactly
>> the spherical center. When xrange is [ 6 : 43], the rotation
>> center should be (6+43)/2 = 24.5, but it is not. It is near
>> x=33. What makes Gnuplot to select the rotation center?
>>
>>>
>>>> If not, how is the center selected by Gnuplot?
>>>
>>>Mouse rotates the entire graph box, so, kind-of obviously,
it is
>>>centered around the center of the graph box. So if you want
>> rotation to
>>>be around a particular point, make all three axis ranges
>> symmetric
>>>around it:
>>>
>>> set xrange [mid_x - size_x : mid_x + size_x]
>>> # likewise for y and z
>>>
>>
>> This is what I thought, but it is not working for me as the
>> example I gave above. Gnuplot seems to have a complex rule to
>> select the rotation center. I really prefer a user selected
>> rotation center.
>>
------------------------------------------------------------------------------
>> Return on Information:
>> Google Enterprise Search pays you back
>> Get the facts.
>> http://p.sf.net/sfu/google-dev2dev
>> _______________________________________________
>> gnuplot-info mailing list
>> gnu...@li...
>> https://lists.sourceforge.net/lists/listinfo/gnuplot-info
>>
>>
>
>--
>View this message in context:
http://old.nabble.com/rotation-center-tp26763320p26779919.html
>Sent from the Gnuplot - User mailing list archive at Nabble.com.
>
>
>------------------------------------------------------------------------------
>Return on Information:
>Google Enterprise Search pays you back
>Get the facts.
>http://p.sf.net/sfu/google-dev2dev
>_______________________________________________
>gnuplot-info mailing list
>gnu...@li...
>https://lists.sourceforge.net/lists/listinfo/gnuplot-info
|
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From: Thomas S. <t.s...@fz...> - 2009-12-16 19:58:02
|
'set pm3d depthorder' should according to the manual work in the same way as the normal hidden3d algorithm. but it obviously doesn't do this. renzresearch wrote: > > Thank you Thomas, > > The sphere was just an example. It is not what I want to > draw. The following script is closer to my real case, which > draws a triangle and a quadrangle. depthorder is used, but > the quadrangle is always in the foreground and the triangle is > always in the background. Does the option depthorder mean the > drawing order is sorted? > > Zhong > > > set terminal x11 0 size 1024,1024 > set view equal xyz > unset surface > unset contour > set xlabel "x" > set xrange [ 6.31720 : 43.9094 ] noreverse nowriteback > set ylabel "y" > set yrange [ 80.5847 : 118.177 ] noreverse nowriteback > set zlabel "z" > set zrange [ 13.7818 : 51.3741 ] noreverse nowriteback > set pm3d implicit at s > set pm3d depthorder > set pm3d interpolate 1,1 flush begin ftriangles hidden3d 100 > corners2color mean > set palette defined ( 0 0.8275 0.8275 0.8275, 0.1667 0.6275 > 0.1255 0.9412, 0.5 1 0.498 0.3137,\ > 0.8333 1 1 0, 1 0.5647 0.9333 0.5647 ) > splot '-' u 1:2:3:4 > 14.7151 89.5297 25.4546 0 > > 14.7151 89.5297 25.4546 0 > 14.807 87.5368 24.2974 0 > 16.5296 89.0361 24.1387 0 > > > 20.3047 93.7361 25.7469 0 > 22.1518 92.287 25.0393 0.0215407 > > 21.1107 92.4429 25.874 0.0188149 > 22.9446 91.0527 24.9673 0.0366333 > e > > > ---- Original message ---- >>Date: Mon, 14 Dec 2009 08:50:07 -0800 (PST) >>From: Thomas Sefzick <t.s...@fz...> >>Subject: Re: [Gnuplot-info] rotation center >>To: gnu...@li... >> >> >>in addition you should set: >> >>set samp 25,10 >>set iso 10,20 >>set urange [-pi:pi] >>set vrange [0:pi] >>set pm3d at s ftriangles depthorder hidden3d 100 >>unset surf >> >>this makes the sphere look much better. >> >> >>renzresearch wrote: >>> >>> >>> >>> ---- Original message ---- >>>>Date: Sun, 13 Dec 2009 11:51:41 +0100 >>>>From: Hans-Bernhard Bröker <HBB...@t-...> >>>>Subject: Re: [Gnuplot-info] rotation center >>>>To: re...@uc... >>>>Cc: gnu...@li... >>>> >>>>Zhong Ren wrote: >>>>> Please consider the following script that draws a sphere. > Why >>>>> the rotation center is not at the center of the sphere, when >>>>> the graphics is spun by the mouse? >>>> >>>>Why should it be? Did you really expect gnuplot to have a >>> special rule >>>>like "whenever there is exactly one spherical surface among >>> the plotted >>>>things, rotation will magically center around that"? >>> >>> No, you didn't get my question. Please consider my original >>> case again: >>> >>> Please consider the following script that draws a sphere. Why >>> the rotation center is not at the center of the sphere, when >>> the graphics is spun by the mouse? If I change to "set xrange >>> [ 6 : 44]", the rotation center becomes the center of the >>> sphere. This makes the behavior of one of my large >>> applications unpredictable. Is there a way to specify the >>> rotation center? If not, how is the center selected by > Gnuplot? >>> >>> set terminal x11 0 size 1024,1024 >>> set parametric >>> set view equal xyz >>> set xlabel "x" >>> set ylabel "y" >>> set zlabel "z" >>> set xrange [ 6 : 43] >>> set yrange [80 : 118] >>> set zrange [13 : 51] >>> set pm3d implicit at s >>> splot 10*cos(u)*cos(v)+25,10*cos(u)*sin(v)+99,10*sin(u)+33 >>> >>> The rotation center is indeed at the spherical center when >>> xrange is [ 6 : 44], because (6+44)/2 = 25, which is exactly >>> the spherical center. When xrange is [ 6 : 43], the rotation >>> center should be (6+43)/2 = 24.5, but it is not. It is near >>> x=33. What makes Gnuplot to select the rotation center? >>> >>>> >>>>> If not, how is the center selected by Gnuplot? >>>> >>>>Mouse rotates the entire graph box, so, kind-of obviously, > it is >>>>centered around the center of the graph box. So if you want >>> rotation to >>>>be around a particular point, make all three axis ranges >>> symmetric >>>>around it: >>>> >>>> set xrange [mid_x - size_x : mid_x + size_x] >>>> # likewise for y and z >>>> >>> >>> This is what I thought, but it is not working for me as the >>> example I gave above. Gnuplot seems to have a complex rule to >>> select the rotation center. I really prefer a user selected >>> rotation center. >>> > ------------------------------------------------------------------------------ >>> Return on Information: >>> Google Enterprise Search pays you back >>> Get the facts. >>> http://p.sf.net/sfu/google-dev2dev >>> _______________________________________________ >>> gnuplot-info mailing list >>> gnu...@li... >>> https://lists.sourceforge.net/lists/listinfo/gnuplot-info >>> >>> >> >>-- >>View this message in context: > http://old.nabble.com/rotation-center-tp26763320p26779919.html >>Sent from the Gnuplot - User mailing list archive at Nabble.com. >> >> >>------------------------------------------------------------------------------ >>Return on Information: >>Google Enterprise Search pays you back >>Get the facts. >>http://p.sf.net/sfu/google-dev2dev >>_______________________________________________ >>gnuplot-info mailing list >>gnu...@li... >>https://lists.sourceforge.net/lists/listinfo/gnuplot-info > > ------------------------------------------------------------------------------ > Return on Information: > Google Enterprise Search pays you back > Get the facts. > http://p.sf.net/sfu/google-dev2dev > _______________________________________________ > gnuplot-info mailing list > gnu...@li... > https://lists.sourceforge.net/lists/listinfo/gnuplot-info > > -- View this message in context: http://old.nabble.com/rotation-center-tp26763320p26817459.html Sent from the Gnuplot - User mailing list archive at Nabble.com. |
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From: Thomas S. <t.s...@fz...> - 2009-12-16 20:21:16
|
interesting: splot '-' u 1:2:3:4 w pm3d seems to work. Thomas Sefzick wrote: > > 'set pm3d depthorder' > should according to the manual work in the same way as the > normal hidden3d algorithm. > but it obviously doesn't do this. > > > renzresearch wrote: >> >> Thank you Thomas, >> >> The sphere was just an example. It is not what I want to >> draw. The following script is closer to my real case, which >> draws a triangle and a quadrangle. depthorder is used, but >> the quadrangle is always in the foreground and the triangle is >> always in the background. Does the option depthorder mean the >> drawing order is sorted? >> >> Zhong >> >> >> set terminal x11 0 size 1024,1024 >> set view equal xyz >> unset surface >> unset contour >> set xlabel "x" >> set xrange [ 6.31720 : 43.9094 ] noreverse nowriteback >> set ylabel "y" >> set yrange [ 80.5847 : 118.177 ] noreverse nowriteback >> set zlabel "z" >> set zrange [ 13.7818 : 51.3741 ] noreverse nowriteback >> set pm3d implicit at s >> set pm3d depthorder >> set pm3d interpolate 1,1 flush begin ftriangles hidden3d 100 >> corners2color mean >> set palette defined ( 0 0.8275 0.8275 0.8275, 0.1667 0.6275 >> 0.1255 0.9412, 0.5 1 0.498 0.3137,\ >> 0.8333 1 1 0, 1 0.5647 0.9333 0.5647 ) >> splot '-' u 1:2:3:4 >> 14.7151 89.5297 25.4546 0 >> >> 14.7151 89.5297 25.4546 0 >> 14.807 87.5368 24.2974 0 >> 16.5296 89.0361 24.1387 0 >> >> >> 20.3047 93.7361 25.7469 0 >> 22.1518 92.287 25.0393 0.0215407 >> >> 21.1107 92.4429 25.874 0.0188149 >> 22.9446 91.0527 24.9673 0.0366333 >> e >> >> >> ---- Original message ---- >>>Date: Mon, 14 Dec 2009 08:50:07 -0800 (PST) >>>From: Thomas Sefzick <t.s...@fz...> >>>Subject: Re: [Gnuplot-info] rotation center >>>To: gnu...@li... >>> >>> >>>in addition you should set: >>> >>>set samp 25,10 >>>set iso 10,20 >>>set urange [-pi:pi] >>>set vrange [0:pi] >>>set pm3d at s ftriangles depthorder hidden3d 100 >>>unset surf >>> >>>this makes the sphere look much better. >>> >>> >>>renzresearch wrote: >>>> >>>> >>>> >>>> ---- Original message ---- >>>>>Date: Sun, 13 Dec 2009 11:51:41 +0100 >>>>>From: Hans-Bernhard Bröker <HBB...@t-...> >>>>>Subject: Re: [Gnuplot-info] rotation center >>>>>To: re...@uc... >>>>>Cc: gnu...@li... >>>>> >>>>>Zhong Ren wrote: >>>>>> Please consider the following script that draws a sphere. >> Why >>>>>> the rotation center is not at the center of the sphere, when >>>>>> the graphics is spun by the mouse? >>>>> >>>>>Why should it be? Did you really expect gnuplot to have a >>>> special rule >>>>>like "whenever there is exactly one spherical surface among >>>> the plotted >>>>>things, rotation will magically center around that"? >>>> >>>> No, you didn't get my question. Please consider my original >>>> case again: >>>> >>>> Please consider the following script that draws a sphere. Why >>>> the rotation center is not at the center of the sphere, when >>>> the graphics is spun by the mouse? If I change to "set xrange >>>> [ 6 : 44]", the rotation center becomes the center of the >>>> sphere. This makes the behavior of one of my large >>>> applications unpredictable. Is there a way to specify the >>>> rotation center? If not, how is the center selected by >> Gnuplot? >>>> >>>> set terminal x11 0 size 1024,1024 >>>> set parametric >>>> set view equal xyz >>>> set xlabel "x" >>>> set ylabel "y" >>>> set zlabel "z" >>>> set xrange [ 6 : 43] >>>> set yrange [80 : 118] >>>> set zrange [13 : 51] >>>> set pm3d implicit at s >>>> splot 10*cos(u)*cos(v)+25,10*cos(u)*sin(v)+99,10*sin(u)+33 >>>> >>>> The rotation center is indeed at the spherical center when >>>> xrange is [ 6 : 44], because (6+44)/2 = 25, which is exactly >>>> the spherical center. When xrange is [ 6 : 43], the rotation >>>> center should be (6+43)/2 = 24.5, but it is not. It is near >>>> x=33. What makes Gnuplot to select the rotation center? >>>> >>>>> >>>>>> If not, how is the center selected by Gnuplot? >>>>> >>>>>Mouse rotates the entire graph box, so, kind-of obviously, >> it is >>>>>centered around the center of the graph box. So if you want >>>> rotation to >>>>>be around a particular point, make all three axis ranges >>>> symmetric >>>>>around it: >>>>> >>>>> set xrange [mid_x - size_x : mid_x + size_x] >>>>> # likewise for y and z >>>>> >>>> >>>> This is what I thought, but it is not working for me as the >>>> example I gave above. Gnuplot seems to have a complex rule to >>>> select the rotation center. I really prefer a user selected >>>> rotation center. >>>> >> ------------------------------------------------------------------------------ >>>> Return on Information: >>>> Google Enterprise Search pays you back >>>> Get the facts. >>>> http://p.sf.net/sfu/google-dev2dev >>>> _______________________________________________ >>>> gnuplot-info mailing list >>>> gnu...@li... >>>> https://lists.sourceforge.net/lists/listinfo/gnuplot-info >>>> >>>> >>> >>>-- >>>View this message in context: >> http://old.nabble.com/rotation-center-tp26763320p26779919.html >>>Sent from the Gnuplot - User mailing list archive at Nabble.com. >>> >>> >>>------------------------------------------------------------------------------ >>>Return on Information: >>>Google Enterprise Search pays you back >>>Get the facts. >>>http://p.sf.net/sfu/google-dev2dev >>>_______________________________________________ >>>gnuplot-info mailing list >>>gnu...@li... >>>https://lists.sourceforge.net/lists/listinfo/gnuplot-info >> >> ------------------------------------------------------------------------------ >> Return on Information: >> Google Enterprise Search pays you back >> Get the facts. >> http://p.sf.net/sfu/google-dev2dev >> _______________________________________________ >> gnuplot-info mailing list >> gnu...@li... >> https://lists.sourceforge.net/lists/listinfo/gnuplot-info >> >> > > -- View this message in context: http://old.nabble.com/rotation-center-tp26763320p26817820.html Sent from the Gnuplot - User mailing list archive at Nabble.com. |
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From: Zhong R. <re...@uc...> - 2009-12-16 22:58:11
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Great! It works now, but spins a bit slower. Thank you very much. Zhong ---- Original message ---- >Date: Wed, 16 Dec 2009 12:21:05 -0800 (PST) >From: Thomas Sefzick <t.s...@fz...> >Subject: Re: [Gnuplot-info] depthorder >To: gnu...@li... > > >interesting: >splot '-' u 1:2:3:4 w pm3d >seems to work. > > >Thomas Sefzick wrote: >> >> 'set pm3d depthorder' >> should according to the manual work in the same way as the >> normal hidden3d algorithm. >> but it obviously doesn't do this. >> >> >> renzresearch wrote: >>> >>> Thank you Thomas, >>> >>> The sphere was just an example. It is not what I want to >>> draw. The following script is closer to my real case, which >>> draws a triangle and a quadrangle. depthorder is used, but >>> the quadrangle is always in the foreground and the triangle is >>> always in the background. Does the option depthorder mean the >>> drawing order is sorted? >>> >>> Zhong >>> >>> >>> set terminal x11 0 size 1024,1024 >>> set view equal xyz >>> unset surface >>> unset contour >>> set xlabel "x" >>> set xrange [ 6.31720 : 43.9094 ] noreverse nowriteback >>> set ylabel "y" >>> set yrange [ 80.5847 : 118.177 ] noreverse nowriteback >>> set zlabel "z" >>> set zrange [ 13.7818 : 51.3741 ] noreverse nowriteback >>> set pm3d implicit at s >>> set pm3d depthorder >>> set pm3d interpolate 1,1 flush begin ftriangles hidden3d 100 >>> corners2color mean >>> set palette defined ( 0 0.8275 0.8275 0.8275, 0.1667 0.6275 >>> 0.1255 0.9412, 0.5 1 0.498 0.3137,\ >>> 0.8333 1 1 0, 1 0.5647 0.9333 0.5647 ) >>> splot '-' u 1:2:3:4 >>> 14.7151 89.5297 25.4546 0 >>> >>> 14.7151 89.5297 25.4546 0 >>> 14.807 87.5368 24.2974 0 >>> 16.5296 89.0361 24.1387 0 >>> >>> >>> 20.3047 93.7361 25.7469 0 >>> 22.1518 92.287 25.0393 0.0215407 >>> >>> 21.1107 92.4429 25.874 0.0188149 >>> 22.9446 91.0527 24.9673 0.0366333 >>> e >>> >>> >>> ---- Original message ---- >>>>Date: Mon, 14 Dec 2009 08:50:07 -0800 (PST) >>>>From: Thomas Sefzick <t.s...@fz...> >>>>Subject: Re: [Gnuplot-info] rotation center >>>>To: gnu...@li... >>>> >>>> >>>>in addition you should set: >>>> >>>>set samp 25,10 >>>>set iso 10,20 >>>>set urange [-pi:pi] >>>>set vrange [0:pi] >>>>set pm3d at s ftriangles depthorder hidden3d 100 >>>>unset surf >>>> >>>>this makes the sphere look much better. >>>> >>>> >>>>renzresearch wrote: >>>>> >>>>> >>>>> >>>>> ---- Original message ---- >>>>>>Date: Sun, 13 Dec 2009 11:51:41 +0100 >>>>>>From: Hans-Bernhard Bröker <HBB...@t-...> >>>>>>Subject: Re: [Gnuplot-info] rotation center >>>>>>To: re...@uc... >>>>>>Cc: gnu...@li... >>>>>> >>>>>>Zhong Ren wrote: >>>>>>> Please consider the following script that draws a sphere. >>> Why >>>>>>> the rotation center is not at the center of the sphere, when >>>>>>> the graphics is spun by the mouse? >>>>>> >>>>>>Why should it be? Did you really expect gnuplot to have a >>>>> special rule >>>>>>like "whenever there is exactly one spherical surface among >>>>> the plotted >>>>>>things, rotation will magically center around that"? >>>>> >>>>> No, you didn't get my question. Please consider my original >>>>> case again: >>>>> >>>>> Please consider the following script that draws a sphere. Why >>>>> the rotation center is not at the center of the sphere, when >>>>> the graphics is spun by the mouse? If I change to "set xrange >>>>> [ 6 : 44]", the rotation center becomes the center of the >>>>> sphere. This makes the behavior of one of my large >>>>> applications unpredictable. Is there a way to specify the >>>>> rotation center? If not, how is the center selected by >>> Gnuplot? >>>>> >>>>> set terminal x11 0 size 1024,1024 >>>>> set parametric >>>>> set view equal xyz >>>>> set xlabel "x" >>>>> set ylabel "y" >>>>> set zlabel "z" >>>>> set xrange [ 6 : 43] >>>>> set yrange [80 : 118] >>>>> set zrange [13 : 51] >>>>> set pm3d implicit at s >>>>> splot 10*cos(u)*cos(v)+25,10*cos(u)*sin(v)+99,10*sin(u)+33 >>>>> >>>>> The rotation center is indeed at the spherical center when >>>>> xrange is [ 6 : 44], because (6+44)/2 = 25, which is exactly >>>>> the spherical center. When xrange is [ 6 : 43], the rotation >>>>> center should be (6+43)/2 = 24.5, but it is not. It is near >>>>> x=33. What makes Gnuplot to select the rotation center? >>>>> >>>>>> >>>>>>> If not, how is the center selected by Gnuplot? >>>>>> >>>>>>Mouse rotates the entire graph box, so, kind-of obviously, >>> it is >>>>>>centered around the center of the graph box. So if you want >>>>> rotation to >>>>>>be around a particular point, make all three axis ranges >>>>> symmetric >>>>>>around it: >>>>>> >>>>>> set xrange [mid_x - size_x : mid_x + size_x] >>>>>> # likewise for y and z >>>>>> >>>>> >>>>> This is what I thought, but it is not working for me as the >>>>> example I gave above. Gnuplot seems to have a complex rule to >>>>> select the rotation center. I really prefer a user selected >>>>> rotation center. >>>>> >>> ------------------------------------------------------------------------------ >>>>> Return on Information: >>>>> Google Enterprise Search pays you back >>>>> Get the facts. >>>>> http://p.sf.net/sfu/google-dev2dev >>>>> _______________________________________________ >>>>> gnuplot-info mailing list >>>>> gnu...@li... >>>>> https://lists.sourceforge.net/lists/listinfo/gnuplot-info >>>>> >>>>> >>>> >>>>-- >>>>View this message in context: >>> http://old.nabble.com/rotation-center-tp26763320p26779919.html >>>>Sent from the Gnuplot - User mailing list archive at Nabble.com. >>>> >>>> >>>>------------------------------------------------------------------------------ >>>>Return on Information: >>>>Google Enterprise Search pays you back >>>>Get the facts. >>>>http://p.sf.net/sfu/google-dev2dev >>>>_______________________________________________ >>>>gnuplot-info mailing list >>>>gnu...@li... >>>>https://lists.sourceforge.net/lists/listinfo/gnuplot-info >>> >>> ------------------------------------------------------------------------------ >>> Return on Information: >>> Google Enterprise Search pays you back >>> Get the facts. >>> http://p.sf.net/sfu/google-dev2dev >>> _______________________________________________ >>> gnuplot-info mailing list >>> gnu...@li... >>> https://lists.sourceforge.net/lists/listinfo/gnuplot-info >>> >>> >> >> > >-- >View this message in context: http://old.nabble.com/rotation-center-tp26763320p26817820.html >Sent from the Gnuplot - User mailing list archive at Nabble.com. > > >------------------------------------------------------------------------------ >This SF.Net email is sponsored by the Verizon Developer Community >Take advantage of Verizon's best-in-class app development support >A streamlined, 14 day to market process makes app distribution fast and easy >Join now and get one step closer to millions of Verizon customers >http://p.sf.net/sfu/verizon-dev2dev >_______________________________________________ >gnuplot-info mailing list >gnu...@li... >https://lists.sourceforge.net/lists/listinfo/gnuplot-info |