<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Hi Ken,<div class=""><br class=""></div><div class="">The thing is, the clouds are distorted if I switched off the “Spherical Coordinates”, and the output shape looks something like a straight line. I attached the image for your reference.</div><div class=""><br class=""></div><div class=""><img apple-inline="yes" id="7D8EE5A0-60B2-452A-A75B-62B143293FED" width="620" height="378" src="cid:75F8AA9E-5CF3-4E5E-A0FD-2F334DB64C06@Home" class=""></div><div class=""><br class=""></div><div class="">Henry</div><div class=""><br class=""><div><blockquote type="cite" class=""><div class="">On 22 Apr 2017, at 6:28 AM, Moreland, Kenneth <<a href="mailto:kmorel@sandia.gov" class="">kmorel@sandia.gov</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="WordSection1" style="page: WordSection1; font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255);"><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman';" class=""><span style="font-size: 11pt; font-family: Calibri;" class="">Are you reading your data in with the Generic/CF reader and with “Spherical Coordinates” clicked on? If so, then the lat/lon/height coordinates are transformed to a sphere in the Cartesian space and thus no longer align with the x, y, and z axes.<o:p class=""></o:p></span></div><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman';" class=""><span style="font-size: 11pt; font-family: Calibri;" class=""><o:p class=""> </o:p></span></div><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman';" class=""><span style="font-size: 11pt; font-family: Calibri;" class="">-Ken<o:p class=""></o:p></span></div><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman';" class=""><span style="font-size: 11pt; font-family: Calibri;" class=""><o:p class=""> </o:p></span></div><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman';" class=""><span style="font-size: 11pt; font-family: Calibri;" class=""><o:p class=""> </o:p></span></div><div style="border-style: solid none none; border-top-width: 1pt; border-top-color: rgb(181, 196, 223); padding: 3pt 0in 0in;" class=""><div style="margin: 0in 0in 0.0001pt 0.5in; font-size: 12pt; font-family: 'Times New Roman';" class=""><b class=""><span style="font-family: Calibri;" class="">From:<span class="Apple-converted-space"> </span></span></b><span style="font-family: Calibri;" class="">ParaView <<a href="mailto:paraview-bounces@paraview.org" style="color: rgb(149, 79, 114); text-decoration: underline;" class="">paraview-bounces@paraview.org</a>> on behalf of Henry Lau <<a href="mailto:henrylau9677@gmail.com" style="color: rgb(149, 79, 114); text-decoration: underline;" class="">henrylau9677@gmail.com</a>><br class=""><b class="">Date:<span class="Apple-converted-space"> </span></b>Friday, April 21, 2017 at 6:35 PM<br class=""><b class="">To:<span class="Apple-converted-space"> </span></b>"<a href="mailto:paraview@paraview.org" style="color: rgb(149, 79, 114); text-decoration: underline;" class="">paraview@paraview.org</a>" <<a href="mailto:paraview@paraview.org" style="color: rgb(149, 79, 114); text-decoration: underline;" class="">paraview@paraview.org</a>><br class=""><b class="">Subject:<span class="Apple-converted-space"> </span></b>[EXTERNAL] [Paraview] Wind Velocity does not match cloud movement<o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0in 0in 0.0001pt 0.5in; font-size: 12pt; font-family: 'Times New Roman';" class=""><o:p class=""> </o:p></div></div><div style="margin: 0in 0in 0.0001pt 0.5in; font-size: 12pt; font-family: 'Times New Roman';" class=""><span style="font-size: 10pt; font-family: Verdana; background-color: rgb(247, 247, 247); background-position: initial initial; background-repeat: initial initial;" class="">Hi,</span><span style="font-size: 10pt; font-family: Verdana;" class=""><br class=""><br class=""><span style="background-color: rgb(247, 247, 247); background-position: initial initial; background-repeat: initial initial;" class="">I was visualising my wind velocity using glyphs and cloud water content at the same time. However, I notice that the direction where the clouds move do not match the direction the glyphs pointing. </span><br class=""><br class=""><span style="background-color: rgb(247, 247, 247); background-position: initial initial; background-repeat: initial initial;" class="">Below are the steps how I create the output:</span><br class=""><span style="background-color: rgb(247, 247, 247); background-position: initial initial; background-repeat: initial initial;" class="">The data is a netcdf file with wind variable array "ua" (eastward_wind_speed), "va" (northward_wind_speed), and "wa" (wind_vertical_velocity). </span><br class=""><span style="background-color: rgb(247, 247, 247); background-position: initial initial; background-repeat: initial initial;" class="">I used a cell_data_to_point_data filter to convert them into point data.</span><br class=""><span style="background-color: rgb(247, 247, 247); background-position: initial initial; background-repeat: initial initial;" class="">Then I combined these 3 arrays using a Paraview calculator with the equation iHat*ua + jHat*va + kHat*wa.</span><br class=""><span style="background-color: rgb(247, 247, 247); background-position: initial initial; background-repeat: initial initial;" class="">Then do a glyph filter to visualise the wind velocity.</span><br class=""><br class=""><span style="background-color: rgb(247, 247, 247); background-position: initial initial; background-repeat: initial initial;" class="">Attached image is the output I got.</span><br class=""><span style="background-color: rgb(247, 247, 247); background-position: initial initial; background-repeat: initial initial;" class="">The blue isosurfaces are the cloud water content while the glyphs are the wind velocity. The problem is, the clouds are moving to the left, which does not match where the glyphs are pointing at.</span><br class=""><br class=""><span style="background-color: rgb(247, 247, 247); background-position: initial initial; background-repeat: initial initial;" class="">What would be the possible reason for this error? </span><br class=""><br class=""><span style="background-color: rgb(247, 247, 247); background-position: initial initial; background-repeat: initial initial;" class="">TIA</span></span><o:p class=""></o:p></div><div class=""><div style="margin: 0in 0in 0.0001pt 0.5in; font-size: 12pt; font-family: 'Times New Roman';" class=""><span id="cid:image001.png@01D2BAF6.F2C7B0A0"><image001.png></span><o:p class=""></o:p></div></div></div></div></blockquote></div><br class=""></div></body></html>