Sensing Palette
Sensing blocks is color-coded light-blue and are used to detect different factors of a project. The controls avaolable here are used to communicate among sprites and with external hardware or programs.
There are 18 sensing blocks: 2 Stack blocks, 7 Boolean blocks and 8 Reporter blocks
1. Stack Blocks: It contains two blocks :
(i) The ask() and wait() block will create an input box with some text, shown at the bottom of the screen. User can input answer into it and submit it, The input is stored in the Answer block. The Answer block automatically updates to most recent input.
Activity:Move the sprite according to the steps entered by the user and the change the dress color also.
1. Add the following script using sensing block, motion block and looks block.
2. As the question appears along with sprite the user entered a number and sprite moves forward according to the entered steps.
3. Then the second question appears to enter the color (a numeric value). The sprite changes its dress color accordingly.
(ii) reset timer: Sets the timer to zero.
2. Boolean Blocks: It contains seven blocks :
The touching()? block checks if the sprite is touching the mouse-pointer, edge, or another sprite (a Reporter block holding the sprite's name can be used). It returns a true value if the sprite touches the selected object otherwise returns false. Every check for collisions with other sprites return false, however it still senses the mouse and the edges.
Activity: A sprite chase another sprite until first sprite touches the sprite.
1. Add the below script using sensing , control , motion and Look block. The sprite dog chase cat and display
“I caught you” when it catches the cat.
Other Blocks are:
3. Boolean Blocks: It contains eight blocks :
The distance to () block reports the distance, in pixels, between it and the mouse-pointer or a specified sprite's costume center. If there is nothing in the drop-down insert of the block, or if a sprite that was deleted is still in the drop-down insert, it reports the distance as 0.
Activity: To find distance between two sprites write following script:
The distance between two sprites shown in the dialogue box.
The other clock available are:
Sensing blocks is color-coded light-blue and are used to detect different factors of a project. The controls avaolable here are used to communicate among sprites and with external hardware or programs.
There are 18 sensing blocks: 2 Stack blocks, 7 Boolean blocks and 8 Reporter blocks
1. Stack Blocks: It contains two blocks :
(i) The ask() and wait() block will create an input box with some text, shown at the bottom of the screen. User can input answer into it and submit it, The input is stored in the Answer block. The Answer block automatically updates to most recent input.
Activity:Move the sprite according to the steps entered by the user and the change the dress color also.
1. Add the following script using sensing block, motion block and looks block.
2. As the question appears along with sprite the user entered a number and sprite moves forward according to the entered steps.
3. Then the second question appears to enter the color (a numeric value). The sprite changes its dress color accordingly.
(ii) reset timer: Sets the timer to zero.
2. Boolean Blocks: It contains seven blocks :
The touching()? block checks if the sprite is touching the mouse-pointer, edge, or another sprite (a Reporter block holding the sprite's name can be used). It returns a true value if the sprite touches the selected object otherwise returns false. Every check for collisions with other sprites return false, however it still senses the mouse and the edges.
Activity: A sprite chase another sprite until first sprite touches the sprite.
1. Add the below script using sensing , control , motion and Look block. The sprite dog chase cat and display
“I caught you” when it catches the cat.
Other Blocks are:
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Reports
true if sprite is touching specified color
Click
on color patch, then use eyedropper to select color
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Reports
true if first color (within sprite) is touching the second color
(in background or another sprite)
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Reports
true if the mouse button is being pressed down
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Reports
true if the specified key is pressed
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Reports
true if computer microphone detects a sound volume greater than 30
(on scale of 1-100)
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Reports
true if specified sensor is pressed
To
use this block, you need to have a “ScratchBoard” connected to
your computer.
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3. Boolean Blocks: It contains eight blocks :
The distance to () block reports the distance, in pixels, between it and the mouse-pointer or a specified sprite's costume center. If there is nothing in the drop-down insert of the block, or if a sprite that was deleted is still in the drop-down insert, it reports the distance as 0.
Activity: To find distance between two sprites write following script:
The distance between two sprites shown in the dialogue box.
The other clock available are:
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Reports
the x-position of the mouse-pointer
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Reports
the y-position of the mouse-pointer
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Reports
the value of the timer (in seconds)
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Reports
the volume (from 1-100) of sounds detected by the computer
microphone
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Reports
the value of specified sensor. for this “ScratchBoard” must be
connected to your computer.
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Reports
x coordinate, y coordinate, direction, costume, size and volume of
the specified sprite.
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Reports
the answer to ask() and wait() block
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