Notes of Continued Access to the Java Applet Version of CalcPlot3D

Although I hope most of you will begin using my latest JavaScript version of CalcPlot3D most of the time, you may wish to use the Java applet version of CalcPlot3D to access some features that have not yet been included in the new JavaScript version.  You may also wish to use some of my other Java applets in your courses and/or you may wish to use Java applets from other sources to illustrate topics in your courses.  This article is posted here to help you continue to access these visualization tools.

The newest version of Firefox (starting with version 52) that released mid-March no longer supports Java applets like the Java version of CalcPlot3D and other Java applets like my 2D CalcGrapher applet (and Chrome has not supported Java applets for over a year).

Happily we do still have some options to continue to run Java applets. Java applets will still run in Internet Explorer 11, in all older versions of Firefox (version 51 and before) and in the new Extended Support Release versions of Firefox, versions 52+ (see below).

If you are having trouble now getting my Java applets to run, here are some useful links about this issue in Firefox and how to install an updated version of Firefox (Extended Support Release) that will still support Java applets until 2018 (in the 32-bit version).

Article about: https://support.mozilla.org/t5/Problems-with-add-ons-plugins-or/Why-do-Java-Silverlight-Adobe-Acrobat-and-other-plugins-no/ta-p/31069

Below are the direct links to download the correct version of Firefox (Extended Support Release) that most of you will need to continue running my Java applets. If you need other versions of Firefox for other languages or operating systems see the paragraph and link below these.

U.S. English: Windows 32-bit download: https://download.mozilla.org/?product=firefox-52.0.1esr-SSL&os=win&lang=en-US

Mac 32-bit download: https://download.mozilla.org/?product=firefox-52.0.1esr-SSL&os=osx&lang=en-US

The following link is to the download page for the Extended Support Release of the current version of Firefox. If you use this page to download it, please be careful to select the option for your system that is NOT 64-bit. That is, it needs to be the 32-bit version. Only the 32-bit version will run Java applets. You may still need to install the Java plugin again, although if it was already installed and updated on your computer, it should really already be there and require no further work (except to possibly update it, when asked).

https://www.mozilla.org/en-US/firefox/organizations/all/

After installing the ESR version of Firefox, note that you will still need to click to Activate Java on the applet page once you open the first Java applet page in this new ESR version of Firefox. You may choose to trust it permanently so you don’t need to be asked each time you run it.

Please let me know if you have any further trouble, but this ESR version of Firefox should take care of any issues for the remainder of 2017. It installs just like a normal Firefox and is the most up-to-date version in every respect.

Paul Seeburger, Project PI

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JavaScript Applet is UP!

The new JavaScript version of CalcPlot3D is now up and running.  It has many of the features of the Java version and the remaining ones are currently being developed.  This new version runs on several different browsers and even tablets and smartphones.

screenshot-applet

Because of the new format some menus options have changed locations, but many of the same shortcuts still work.  For example:

  • To toggle on/off the box, around the plot type the letter “B”
  • To toggle on/off the perspective, type the letter “P”
  • To toggle on/off transparency, type Ctrl-T
  • To reset the graph to the original orientation type the home key or
  • To view the graph from the z-axis, the x-axis, or the y-axis, type Alt-z, Alt-x, or Alt- y, respectively).
  • To save the current view as a URL to access later, click on the triple bars, then File, then Encode View in URL.
  • The 2D-trace plane that allows you to move a point along the surface is hidden in the default mode.  To view the trace plane, select the grid icon that contains a blue point.
  • To view the built-in examples of space curves, vector fields, surfaces, etc., click on the triple bars, then examples.
  • The parameters (a,b,c,d) can be controlled and added by selecting the “Slider” option under “add to graph.”

 

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A sweet application of parametric curves

This Washington Post article about the mathematics of taffy pulling is screaming to be turned into a classroom example/activity.  And here’s a link to the full mathematical article in the arxiv complete with equations.

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CalcPlot3D workshop at RMU

calcplot3d-workshop

On August 7-10, 2016, nine engineers, mathematicians, developers, and educators met at Robert Morris University to develop new CalcPlot3D explorations, to begin importation of explorations to WeBWorK, and to continue research on student understanding of multivariable calculus concepts.  The new explorations will be described on the blog after they are pilot tested and are ready for dissemination.

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RMU Faculty Research Conference

I had a great time this morning manning a poster about the CalcPlot3D applet, some of the models that I have made this semester and am using in class, and our initial research on student visual understanding of multivariable calculus concepts at the Robert Morris University Research and Grants Symposium.  10259779_10206290199713094_129500855875661757_n

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Hidden gem: Time dependent vector fields

You have probably seen the “Add a Vector Field” option under the Graph menu in CalcPlot3D which allows you to create some nifty three-dimensional vector fields like the one below.

vectorfield

But did you know that you can add a parameter (t) to the vector field to create and animate time dependent vector fields by controlling the slide bar for t in the Animate Parameters pop-up window? Bonus: Click on the 2D graph and view the flow lines!

Below is a screenshot.  Go to the CalcPlot3D applet and try for yourself!

screenshot-animation

 

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Parametric Heart

parametric-heart

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Script to find an intersection of two surfaces and a tangent line

This is a script that I use in class to validate and visualize the results of a 2 step problem which asks students to find a parametric equation representing the intersection of two surfaces:  z=x^2+3y^2 and x=y^2 and then to find the tangent line to this curve at the point (1,1,4).

parametric-intersection

screen shot of the script

Feel free to copy this script into a text file and save as .txt file for future use or editing.  To learn more about using scripts, please see the Scripting with CalcPlot3D user guide.

<init steps="5">
<step 1>
 <window>
 xmin ="-4"
 xmax ="4"
 xscale ="1"
 ymin ="-4"
 ymax ="4"
 yscale ="1"
 zmin ="-1"
 zmax ="10"
 zscale ="1"
 zMinClip ="-4"
 zMaxClip ="8"
 centerXPercent ="0.5"
 centerYPercent ="0.5"
 hsrMode ="0"
 rotationSteps ="40.0"
 autoSpin ="true"
 anaglyph ="none"
 edgesOn ="true"
 facesOn ="true"
 opaque ="true"
 transparency ="140"
 smooth ="false"
 antialiasAll ="false"
 showBox ="false"
 showAxes ="true"
 perspective ="true"
 whiteBackground ="false"
 colorBrightness ="0.1"
 gridSize ="25"
 zoom ="0.7"
</window>
<viewPoint center="(8.23639103546332, 4.755282581475766, 3.0901699437494745)"
 focus="(0.0, 0.0, 0.0)"
 up="(0.0, 0.0, 2.0)"/>
<function type ="z = f(x, y)" function = "x^2+3y^2" num ="1" visible = "true" format = "Normal" />
</step>
<step 2>
 <window>
 xmin ="-4"
 xmax ="4"
 xscale ="1"
 ymin ="-4"
 ymax ="4"
 yscale ="1"
 zmin ="-1"
 zmax ="10"
 zscale ="1"
 zMinClip ="-4"
 zMaxClip ="8"
 centerXPercent ="0.5"
 centerYPercent ="0.5"
 hsrMode ="0"
 rotationSteps ="40.0"
 autoSpin ="true"
 anaglyph ="none"
 edgesOn ="true"
 facesOn ="true"
 opaque ="true"
 transparency ="140"
 smooth ="false"
 antialiasAll ="false"
 showBox ="false"
 showAxes ="true"
 perspective ="true"
 whiteBackground ="false"
 colorBrightness ="0.1"
 gridSize ="25"
 zoom ="0.7"
</window>
<viewPoint center="(8.23639103546332, 4.755282581475766, 3.0901699437494745)"
 focus="(0.0, 0.0, 0.0)"
 up="(0.0, 0.0, 2.0)"/>
<function type ="x = f(y, z)" function = "y^2" num ="2" visible = "true" format = "Normal" />
</step>
<step 3>
 <window>
 xmin ="-4"
 xmax ="4"
 xscale ="1"
 ymin ="-4"
 ymax ="4"
 yscale ="1"
 zmin ="-1"
 zmax ="10"
 zscale ="1"
 zMinClip ="-4"
 zMaxClip ="8"
 centerXPercent ="0.5"
 centerYPercent ="0.5"
 hsrMode ="0"
 rotationSteps ="40.0"
 autoSpin ="true"
 anaglyph ="none"
 edgesOn ="true"
 facesOn ="true"
 opaque ="true"
 transparency ="140"
 smooth ="false"
 antialiasAll ="false"
 showBox ="false"
 showAxes ="true"
 perspective ="true"
 whiteBackground ="false"
 colorBrightness ="0.1"
 gridSize ="25"
 zoom ="0.7"
</window>
<viewPoint center="(8.23639103546332, 4.755282581475766, 3.0901699437494745)"
 focus="(0.0, 0.0, 0.0)"
 up="(0.0, 0.0, 2.0)"/>
<function type ="z = f(x, y)" function = "x^2+3y^2" num ="1" visible = "true" format = "Normal" />
 <function type ="x = f(y, z)" function = "y^2" num ="2" visible = "true" format = "Reversed Color" />
</step>
<step 4>
 <window>
 xmin ="-4"
 xmax ="4"
 xscale ="1"
 ymin ="-4"
 ymax ="4"
 yscale ="1"
 zmin ="-1"
 zmax ="10"
 zscale ="1"
 zMinClip ="-4"
 zMaxClip ="8"
 centerXPercent ="0.5"
 centerYPercent ="0.5"
 hsrMode ="0"
 rotationSteps ="40.0"
 autoSpin ="true"
 anaglyph ="none"
 edgesOn ="true"
 facesOn ="true"
 opaque ="false"
 transparency ="140"
 smooth ="false"
 antialiasAll ="false"
 showBox ="false"
 showAxes ="true"
 perspective ="true"
 whiteBackground ="false"
 colorBrightness ="0.1"
 gridSize ="25"
 zoom ="0.7"
</window>
<viewPoint center="(8.23639103546332, 4.755282581475766, 3.0901699437494745)"
 focus="(0.0, 0.0, 0.0)"
 up="(0.0, 0.0, 2.0)"/>
<function type ="z = f(x, y)" function = "x^2+3y^2" num ="1" visible = "true" format = "Normal" />
 <function type ="x = f(y, z)" function = "y^2" num ="2" visible = "true" format = "Reversed Color" />
</step>
<step 5>
 <window>
 xmin ="-4"
 xmax ="4"
 xscale ="1"
 ymin ="-4"
 ymax ="4"
 yscale ="1"
 zmin ="-1"
 zmax ="10"
 zscale ="1"
 zMinClip ="-4"
 zMaxClip ="8"
 centerXPercent ="0.5"
 centerYPercent ="0.5"
 hsrMode ="0"
 rotationSteps ="40.0"
 autoSpin ="true"
 anaglyph ="none"
 edgesOn ="true"
 facesOn ="true"
 opaque ="false"
 transparency ="140"
 smooth ="false"
 antialiasAll ="false"
 showBox ="false"
 showAxes ="true"
 perspective ="true"
 whiteBackground ="false"
 colorBrightness ="0.1"
 gridSize ="25"
 zoom ="0.7"
</window>
<viewPoint center="(8.236391035463319, 4.755282581475766, 3.0901699437494745)"
 focus="(0.0, 0.0, 0.0)"
 up="(0.0, 0.0, 2.0)"/>
<function type ="z = f(x, y)" function = "x^2+3y^2" num ="1" visible = "true" format = "Normal" />
 <function type ="x = f(y, z)" function = "y^2" num ="2" visible = "true" format = "Reversed Color" />
 <curve>
 x = "t^2"
 y = "t"
 z = "t^4+3t^2"
 tMin = "-2"
 tMax = "2"
 tSteps = "100"
 tValue = "0"
 showPt = "true"
 ptSize = "9"
 trace = "true"
 arrowSize = "18.0"
 velocity = "false"
 acceleration = "false"
 showTrace = "false"
 view2D = "false"
 width = "4"
 showArrows = "false"
 numArrows = "8"
 transformArrows = "false"
 color = "255, 0, 0"
 colorMode = "PLAIN"
 showTNB = "false"
 showTNBEqs = "false"
 showTNBLabels = "false"
 showOscPlane = "false"
 showRectPlane = "false"
 showNormPlane = "false"
 TNBScale = "1.0"
 showOscCircle = "false"
 showCurvature = "false"
 </curve>
</step>
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A 3D printed knot

Here are two photos of the 3D model of the parametric surface:
x(u,v)  = cos(u)*cos(v)+3cos(u)*(1.5+sin(u*5/3)/2)
y(u,v) = sin(u)*cos(v)+3sin(u)*(1.5+sin(u*5/3)/2)
z(u,v) = sin(v)+2cos(5u/3)

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3D model finished!

My first attempt at a 3D printed model was finished today.   Next time I’ll refine the grid so that the surface isn’t so faceted, but I’m happy with the result.  I can’t wait to create more.

12642911_10205998491100561_4344462830891029510_n

f(x,y)=sin(x)sin(y)x

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