Difference between revisions of "KTurtle/C3/Special-Commands-in-KTurtle/English-timed"

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 +
{|border =1
 +
!Visual Cue
 +
!Narration
 +
|-
 +
||00:01
 +
||Hello everybody. Welcome to this tutorial on '''Special Commands'''  in '''KTurtle.'''
 +
|-
 +
||00:08
 +
||In this tutorial, we will learn about
  
 +
* '''“learn”''' command and
 +
 +
* '''“random”''' Command
 +
|-
 +
||00:15
 +
||To record this tutorial I am using, '''Ubuntu Linux''' OS version. 12.04. '''KTurtle''' version. 0.8.1 beta.
 +
|-
 +
|| 00:28
 +
||We assume that you have basic working knowledge of KTurtle
 +
 +
|-
 +
|| 00:33
 +
||If not, for relevant tutorials, please visit our website. '''http://spoken-tutorial.org'''
 +
|-
 +
|| 00:39
 +
||Let's open a new KTurtle Application.
 +
 +
|-
 +
|| 00:42
 +
||Click on '''Dash home.''' 
 +
 +
|-
 +
|| 00:44
 +
||In the Search bar, type '''KTurtle'''.
 +
 +
|-
 +
|| 00:47
 +
||Click on the''' KTurtle''' icon.
 +
|-
 +
||00:50
 +
||Let's first look at  “learn” command
 +
|-
 +
|| 00:53
 +
||''' learn''' is a special command  as it is used to create your own commands.
 +
 +
|-
 +
|| 01:01
 +
||'learn' Command  can takes input and returns output.
 +
|-
 +
||01:05
 +
||Let's take a look at how a new command is created.
 +
|-
 +
||01:10
 +
||Let me zoom the program text to have a clear view.
 +
|-
 +
||01:14
 +
||Let's type a code in the editor to draw a square:
 +
 +
|-
 +
|| 01:19
 +
||'''repeat 4''' within curly brackets
 +
 +
{
 +
'''forward 10'''
 +
 +
'''turnleft 90'''
 +
 +
}
 +
 +
|-
 +
|| 01:31
 +
||Here the number '''10''' specfies the length of the side of the square.
 +
|-
 +
|| 01:37
 +
||Now let's  learn the commands involved to draw a square, using the '''learn''' command.
 +
 +
|-
 +
|| 01:45
 +
||We will name of this set of commands to draw a square as '''square'''.
 +
 +
|-
 +
|| 01:50
 +
||The command ''''learn'''' is followed by the name of the command to be learnt, in this case it is a '''square.'''
 +
|-
 +
|| 01:59
 +
||Let us type the following code
 +
 +
|-
 +
|| 02:02
 +
||'''learn''' space '''square''' space '''$x'''
 +
 +
|-
 +
|| 02:10
 +
||let's include curly brackets
 +
 +
 +
|-
 +
|| 02:13
 +
||let's replace '''10''' by '''$x'''
 +
 +
'''forward $x'''
 +
 +
'''turnleft 90'''
 +
}
 +
}
 +
|-
 +
|| 02:19
 +
||New command that we have defined  is called '''square.'''
 +
 +
|-
 +
|| 02:23
 +
||'''square''' takes one input argument,  '''$x''' to set the size of the square.
 +
 +
|-
 +
|| 02:31
 +
||Note that when you run this  code,''' square''' returns no output.
 +
 +
|-
 +
|| 02:37
 +
||The command '''learn''' is just 'learning' other command ''' square''' to be used later.
 +
 +
|-
 +
|| 02:43
 +
||'''square''' command can now be used like a normal command in the rest of the code.
 +
|-
 +
|| 02:51
 +
||Let me add few more lines here.
 +
|-
 +
|| 02:54
 +
||Let's type
 +
 +
 +
 +
'''go 200,200'''
 +
 +
'''square 100'''
 +
 +
|-
 +
|| 03:04
 +
||Using the command '''square 100''' Turtle draws a square of dimension 100.
 +
|-
 +
|| 03:11
 +
||Let's  the Run code now
 +
 +
|-
 +
|| 03:13
 +
||'''Turtle''' draws a square on the canvas.
 +
 +
|-
 +
|| 03:17
 +
||Let's  now replace 100 by 50.
 +
|-
 +
|| 03:22
 +
||Let's run again
 +
 +
|-
 +
|| 03:23
 +
||'''Turtle''' draws an another '''square''' with dimension 50.
 +
 +
|-
 +
|| 03:28
 +
||Please note that this command can be used only within the scope of this program
 +
|-
 +
|| 03:35
 +
||I will clear the current code from editor.
 +
 +
|-
 +
|| 03:38
 +
||Type “clear” command and Run to clean the canvas.
 +
|-
 +
||03:44
 +
||Next we will  learn about “random” command.
 +
|-
 +
|| 03:48
 +
||'''random''' command takes input and returns output.
 +
|-
 +
|| 03:52
 +
|| Syntax for the random command is “random X,Y”
 +
 +
|-
 +
|| 03:57
 +
|| where X and Y are two inputs.
 +
 +
|-
 +
|| 04:01
 +
|| X sets minimum output and Y sets maximum output.
 +
 +
|-
 +
|| 04:07
 +
|| Output is randomly chosen number between X and Y.
 +
|-
 +
||04:13
 +
||Let's put the “random” command to use in the application.
 +
|-
 +
|| 04:18
 +
||I already have acode in a text editor.
 +
 +
|-
 +
|| 04:22
 +
||I will explain the code.
 +
|-
 +
|| 04:24
 +
||“reset” command sets '''Turtle''' to default position
 +
|-
 +
|| 04:29
 +
||Here, the command '''random 1,20''' selects a random number which is equal or greater than 1 and equal or less than 20, and assigns it to the variable x.
 +
|-
 +
|| 04:44
 +
||'''repeat''' command and the commands begins curly brackets draw a circle
 +
|-
 +
|| 04:51
 +
||I will copy the code from text editor and paste it into '''KTurtle's''' editor.
 +
 +
|-
 +
|| 04:58
 +
||Pause the tutorial and type the program into your '''KTurtle''' editor.
 +
 +
|-
 +
|| 05:03
 +
||Resume the tutorial after typing the program
 +
|-
 +
|| 05:08
 +
||When we run this code,
 +
 +
|-
 +
|| 05:10
 +
||'''Turtle''' draws a  circle with radius  between 1 and 20  on the canvas.
 +
 +
|-
 +
|| 05:16
 +
||Let us execute this code a few times,
 +
 +
|-
 +
|| 05:20
 +
||You can see that a circle with a different size is generated each time.
 +
 +
|-
 +
|| 05:26
 +
||Every time you execute this code, a circle with a different radius is drawn on the canvas.
 +
|-
 +
||05:33
 +
||Let us now use both the '''learn''' and '''random''' commands in an example.
 +
|-
 +
|| 05:39
 +
||I will clear the current code  from the editor  type '''clear''' command and '''Run''' to clean the canvas.
 +
|-
 +
|| 05:48
 +
||I already have a program in the Text editor.
 +
 +
|-
 +
|| 05:52
 +
||I will explain the code now.
 +
|-
 +
||05:55
 +
||“reset” command sets Turtle to its default position.
 +
|-
 +
|| 06:00
 +
||'''canvassize 300,300''' sets the width and height of the canvas to 300 pixels each.
 +
|-
 +
|| 06:09
 +
||'''$R, $G,''' and '''$B''' are three variables to which I am assigning random values between 0 and 255.
 +
|-
 +
|| 06:19
 +
||In the command '''canvascolor $R,$G, and $B''' ,
 +
 +
|-
 +
|| 06:23
 +
||the Red-Green-Blue combination is replaced by the values assigned to the  variables R, G, and B in the previous step.
 +
 +
|-
 +
|| 06:34
 +
||The canvas color is randomly  set  when this command is executed.
 +
|-
 +
|| 06:41
 +
||'''$red, $blue, $green''' are another set of variables
 +
 +
|-
 +
|| 06:45
 +
||to which random values between 0 and 255 are assigned randomly.
 +
 +
|-
 +
|| 06:53
 +
||'''pencolor  $red, $blue and $green''' the Red-Blue -Green combination values are replaced by the variables
 +
|-
 +
|| 07:02
 +
|| '''$red''', '''$green''' and '''$blue''' to which random values were assigned
 +
in the previous step.
 +
|-
 +
|| 07:10
 +
||The color of the pen is also set randomly when the command is executed.
 +
|-
 +
|| 07:18
 +
||'''penwidth 2''' sets the width of pen to 2 pixels.
 +
|-
 +
||07:25
 +
|| Next I have entered the code to learn to draw a circle.
 +
 +
|-
 +
|| 07:30
 +
||Here '''$x''' represents the size of the circle.
 +
 +
|-
 +
|| 07:35
 +
||'''repeat''' command followed by the code in curly brackets draws a circle.
 +
|-     
 +
|| 07:43
 +
||The next set of commands that is  '''go''' commands followed by '''circle''' commands draw circles with the specified sizes.
 +
|-
 +
|| 07:54
 +
||For example: circle with size 5 draws a circle with size 5
 +
 +
|-
 +
|| 08:01
 +
||At the co-ordinates  specified at X and Y positions in the '''go''' command.
 +
 +
|-
 +
|| 08:09
 +
||For each circle, I have specified different positions on the canvas.
 +
|-
 +
|| 08:16
 +
||I will copy the code from text editor and paste it into KTurtle's editor.
 +
 +
|-
 +
|| 08:23
 +
||Pause the tutorial here and type the program into your KTurtle editor.
 +
 +
|-
 +
|| 08:29
 +
||Resume the tutorial after typing the program.
 +
|-
 +
|| 08:33
 +
||I will execute this code in''' Fullspeed'''.
 +
 +
|-
 +
|| 08:37
 +
||You can execute this code at any of the speeds specified in the ''' Run''' option.
 +
 +
|-
 +
|| 08:43
 +
||I will run this code a few times.
 +
 +
|-
 +
|| 08:46
 +
||You can see the difference in randomly set values of pen color and canvas color.
 +
 +
|-
 +
|| 08:54
 +
||Note the change in the color of the pen and the canvas on each execution.
 +
 +
|-
 +
|| 09:01
 +
||You can execute the code how many ever times you want and note the changes  in
 +
the randomly set values of the pen and canvas.
 +
|-
 +
||09:15
 +
||With this we come to the end of this tutorial.
 +
|-
 +
|| 09:20
 +
||Let's summarize
 +
|-
 +
||09:22
 +
||In this tutorial we have learnt about,
 +
 +
* “learn” command  and
 +
 +
* “random” command.
 +
|-
 +
||09:30
 +
||As an assignment for you to solve,
 +
 +
|-
 +
|| 09:32
 +
||Using  '''learn''' command, draw a
 +
 +
* pentagon
 +
 +
* square
 +
 +
* rectangle
 +
 +
|-
 +
|| 09:39
 +
||hexagon on all four corners of your canvas and
 +
 +
|-
 +
|| 09:45
 +
|| A circle at the centre of the canvas.
 +
 +
|-
 +
|| 09:49
 +
|| Using the “random” command create various colors and
 +
 +
|-
 +
|| 09:55
 +
|| Customize your geometric shapes and canvas.
 +
|-
 +
||  10:00
 +
||Watch the video available at this URL '''http://spoken-tutorial.org/What is a Spoken Tutorial'''
 +
|-
 +
|| 10:04
 +
||It summarises the Spoken Tutorial project
 +
 +
|-
 +
|| 10:08
 +
||If you do not have good bandwidth, you can download and watch it
 +
|-
 +
|| 10:13
 +
||The Spoken Tutorial Project Team :
 +
 +
|-
 +
|| 10:15
 +
||Conducts workshops using spoken tutorials
 +
 +
|-
 +
|| 10:19
 +
||Gives certificates to those who pass an online test
 +
 +
|-
 +
|| 10:22
 +
||For more details, please write to  '''contact@spoken-tutorial.org'''
 +
|-
 +
|| 10:29
 +
||Spoken Tutorial Project is a part of the Talk to a Teacher project
 +
 +
|-
 +
|| 10:33
 +
||It is supported by the National Mission on Education through ICT, MHRD, Government of India
 +
 +
|-
 +
|| 10:40
 +
||More information on this Mission is available at this link  '''http://spoken-tutorial.org/NMEICT-Intro ]'''
 +
 +
|-
 +
|| 10:46
 +
||This script is contributed by '''IT for change, Bangaluru.'''
 +
 +
|-
 +
|| 10:50
 +
||This is Madhuri Ganpathi from '''IIT Bombay''' signing off. Thank you for joining.
 +
|-

Revision as of 12:53, 22 April 2013

Visual Cue Narration
00:01 Hello everybody. Welcome to this tutorial on Special Commands in KTurtle.
00:08 In this tutorial, we will learn about
  • “learn” command and
  • “random” Command
00:15 To record this tutorial I am using, Ubuntu Linux OS version. 12.04. KTurtle version. 0.8.1 beta.
00:28 We assume that you have basic working knowledge of KTurtle
00:33 If not, for relevant tutorials, please visit our website. http://spoken-tutorial.org
00:39 Let's open a new KTurtle Application.
00:42 Click on Dash home.
00:44 In the Search bar, type KTurtle.
00:47 Click on the KTurtle icon.
00:50 Let's first look at “learn” command
00:53 learn is a special command as it is used to create your own commands.
01:01 'learn' Command can takes input and returns output.
01:05 Let's take a look at how a new command is created.
01:10 Let me zoom the program text to have a clear view.
01:14 Let's type a code in the editor to draw a square:
01:19 repeat 4 within curly brackets

{ forward 10

turnleft 90

}

01:31 Here the number 10 specfies the length of the side of the square.
01:37 Now let's learn the commands involved to draw a square, using the learn command.
01:45 We will name of this set of commands to draw a square as square.
01:50 The command 'learn' is followed by the name of the command to be learnt, in this case it is a square.
01:59 Let us type the following code
02:02 learn space square space $x
02:10 let's include curly brackets


02:13 let's replace 10 by $x

forward $x

turnleft 90 } }

02:19 New command that we have defined is called square.
02:23 square takes one input argument, $x to set the size of the square.
02:31 Note that when you run this code, square returns no output.
02:37 The command learn is just 'learning' other command square to be used later.
02:43 square command can now be used like a normal command in the rest of the code.
02:51 Let me add few more lines here.
02:54 Let's type


go 200,200

square 100

03:04 Using the command square 100 Turtle draws a square of dimension 100.
03:11 Let's the Run code now
03:13 Turtle draws a square on the canvas.
03:17 Let's now replace 100 by 50.
03:22 Let's run again
03:23 Turtle draws an another square with dimension 50.
03:28 Please note that this command can be used only within the scope of this program
03:35 I will clear the current code from editor.
03:38 Type “clear” command and Run to clean the canvas.
03:44 Next we will learn about “random” command.
03:48 random command takes input and returns output.
03:52 Syntax for the random command is “random X,Y”
03:57 where X and Y are two inputs.
04:01 X sets minimum output and Y sets maximum output.
04:07 Output is randomly chosen number between X and Y.
04:13 Let's put the “random” command to use in the application.
04:18 I already have acode in a text editor.
04:22 I will explain the code.
04:24 “reset” command sets Turtle to default position
04:29 Here, the command random 1,20 selects a random number which is equal or greater than 1 and equal or less than 20, and assigns it to the variable x.
04:44 repeat command and the commands begins curly brackets draw a circle
04:51 I will copy the code from text editor and paste it into KTurtle's editor.
04:58 Pause the tutorial and type the program into your KTurtle editor.
05:03 Resume the tutorial after typing the program
05:08 When we run this code,
05:10 Turtle draws a circle with radius between 1 and 20 on the canvas.
05:16 Let us execute this code a few times,
05:20 You can see that a circle with a different size is generated each time.
05:26 Every time you execute this code, a circle with a different radius is drawn on the canvas.
05:33 Let us now use both the learn and random commands in an example.
05:39 I will clear the current code from the editor type clear command and Run to clean the canvas.
05:48 I already have a program in the Text editor.
05:52 I will explain the code now.
05:55 “reset” command sets Turtle to its default position.
06:00 canvassize 300,300 sets the width and height of the canvas to 300 pixels each.
06:09 $R, $G, and $B are three variables to which I am assigning random values between 0 and 255.
06:19 In the command canvascolor $R,$G, and $B ,
06:23 the Red-Green-Blue combination is replaced by the values assigned to the variables R, G, and B in the previous step.
06:34 The canvas color is randomly set when this command is executed.
06:41 $red, $blue, $green are another set of variables
06:45 to which random values between 0 and 255 are assigned randomly.
06:53 pencolor $red, $blue and $green the Red-Blue -Green combination values are replaced by the variables
07:02 $red, $green and $blue to which random values were assigned

in the previous step.

07:10 The color of the pen is also set randomly when the command is executed.
07:18 penwidth 2 sets the width of pen to 2 pixels.
07:25 Next I have entered the code to learn to draw a circle.
07:30 Here $x represents the size of the circle.
07:35 repeat command followed by the code in curly brackets draws a circle.
07:43 The next set of commands that is go commands followed by circle commands draw circles with the specified sizes.
07:54 For example: circle with size 5 draws a circle with size 5
08:01 At the co-ordinates specified at X and Y positions in the go command.
08:09 For each circle, I have specified different positions on the canvas.
08:16 I will copy the code from text editor and paste it into KTurtle's editor.
08:23 Pause the tutorial here and type the program into your KTurtle editor.
08:29 Resume the tutorial after typing the program.
08:33 I will execute this code in Fullspeed.
08:37 You can execute this code at any of the speeds specified in the Run option.
08:43 I will run this code a few times.
08:46 You can see the difference in randomly set values of pen color and canvas color.
08:54 Note the change in the color of the pen and the canvas on each execution.
09:01 You can execute the code how many ever times you want and note the changes in

the randomly set values of the pen and canvas.

09:15 With this we come to the end of this tutorial.
09:20 Let's summarize
09:22 In this tutorial we have learnt about,
  • “learn” command and
  • “random” command.
09:30 As an assignment for you to solve,
09:32 Using learn command, draw a
  • pentagon
  • square
  • rectangle
09:39 hexagon on all four corners of your canvas and
09:45 A circle at the centre of the canvas.
09:49 Using the “random” command create various colors and
09:55 Customize your geometric shapes and canvas.
10:00 Watch the video available at this URL http://spoken-tutorial.org/What is a Spoken Tutorial
10:04 It summarises the Spoken Tutorial project
10:08 If you do not have good bandwidth, you can download and watch it
10:13 The Spoken Tutorial Project Team :
10:15 Conducts workshops using spoken tutorials
10:19 Gives certificates to those who pass an online test
10:22 For more details, please write to contact@spoken-tutorial.org
10:29 Spoken Tutorial Project is a part of the Talk to a Teacher project
10:33 It is supported by the National Mission on Education through ICT, MHRD, Government of India
10:40 More information on this Mission is available at this link http://spoken-tutorial.org/NMEICT-Intro ]
10:46 This script is contributed by IT for change, Bangaluru.
10:50 This is Madhuri Ganpathi from IIT Bombay signing off. Thank you for joining.

Contributors and Content Editors

Krupali, Madhurig, PoojaMoolya, Pratik kamble, Pravin1389, Sandhya.np14, Sneha

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