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Program code for the LeftBeachball

The code that I wrote (by dragging blocks into the center pane) for the sprite named LeftBeachball is shown in Image 6 .

Image 6. program code for the left beach ball.

Missing image.
Image 6. Program code for the left beach ball.

You are already familiar with the tan block with the green flag shown in Image 6 because you learned about it in a previous module. However, theblue block in Image 6 has not been used prior to this module.

Adding the blue go to block to the program

The blue block shown in Image 6 was added to the program module by:

  • Clicking the dark blue button labeled Motion in the upper left of Image 4 . (See Image 13 for all of the programming blocks belonging to the Motion group.)
  • Dragging the blue block shown in Image 6 from the left panel to the center panel and clicking it into place under the tan block.
  • Typing the literal values -200 and 0 into the two white boxes on the blue block.

Coordinate values

If you move the mouse pointer around in the user interface, the coordinates of the mouse pointer are displayed at the rightend of the gray area immediately below the Stage as shown in Image 4 . The x coordinates range from -240 at the left to +240 at the right. The ycoordinates range from +180 at the top to -180 at the bottom.

Behavior of the LeftBeachball

The behavior of the program module shown in Image 6 can be interpreted as follows: When the user clicks the green flag, cause the sprite named LeftBeachball to move to a location with an x (horizontal) coordinate value of -200 and a y (vertical) coordinate value of 0. Since the origin is at the center of the Stage, this causes the beach ball to move to theleft of the origin on the horizontal axis.

Some experimentation was required

Because I didn't know the diameter of the beach ball, I had to experiment to determine how far to move it to the left of the origin to locate it at the leftside of the Stage as shown in Image 4 . I settled on a value of -200 for the x coordinate and a value of 0 for the y coordinate.

Positioning the other beach ball

In the interest of brevity, I won't show the code required to position the beach ball on the right side of the Stage. I did exactly the same thing for that beach ballexcept that I specified the value of the x coordinate to be 200 instead of - 200. This causes the beach ball named RightBeachball to move to the right side of the Stage when the user clicks the green flag.

The basketball

Initializing the position of the basketball

Image 7 shows a portion of the center pane after clicking on the sprite named Basketball .

Image 7. initializing the position and orientation of the basketball.

Missing image.
Image 7. Initializing the position and orientation of the basketball.

You will note that the tan block and the uppermost blue block in Image 7 arethe same as in Image 6 except that the x coordinate value is set to 0. This causes the basketball to move to the origin when the user clicks the greenflag.

Initializing the orientation of the basketball

However, Image 7 contains a block that is not contained in Image 6 . The bottom blue block in Image 7 is used to set the orientation of the basketball. (By orientation, I mean the direction that the basketball is facing.)

Questions & Answers

Do somebody tell me a best nano engineering book for beginners?
s. Reply
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
how to fabricate graphene ink ?
SUYASH Reply
for screen printed electrodes ?
SUYASH
What is lattice structure?
s. Reply
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
what is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
China
Cied
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
Porter
many many of nanotubes
Porter
what is the k.e before it land
Yasmin
what is the function of carbon nanotubes?
Cesar
I'm interested in nanotube
Uday
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
AMJAD
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
good afternoon madam
AMJAD
what is system testing
AMJAD
what is the application of nanotechnology?
Stotaw
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
Azam
anybody can imagine what will be happen after 100 years from now in nano tech world
Prasenjit
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
Azam
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
Prasenjit
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
Damian
silver nanoparticles could handle the job?
Damian
not now but maybe in future only AgNP maybe any other nanomaterials
Azam
Hello
Uday
I'm interested in Nanotube
Uday
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
Prasenjit
can nanotechnology change the direction of the face of the world
Prasenjit Reply
At high concentrations (>0.01 M), the relation between absorptivity coefficient and absorbance is no longer linear. This is due to the electrostatic interactions between the quantum dots in close proximity. If the concentration of the solution is high, another effect that is seen is the scattering of light from the large number of quantum dots. This assumption only works at low concentrations of the analyte. Presence of stray light.
Ali Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Teaching beginners to code. OpenStax CNX. May 27, 2013 Download for free at http://cnx.org/content/col11498/1.20
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