Difference between revisions of "Activities/Turtle Art/Turtle"
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====examples (1)==== | ====examples (1)==== | ||
| − | [[Image:TA-forward-example.png]] [[Image:TA-back-example.png]] [[Image:TA-forward-right-example.png]] [[Image:TA-arc-example.png]] [[Image:TA-seth-example.png]] [[Image:TA-heading-example.png]] [[Image:TA- | + | [[Image:TA-forward-example.png]] [[Image:TA-back-example.png]] [[Image:TA-forward-right-example.png]] [[Image:TA-arc-example.png]] [[Image:TA-seth-example.png]] [[Image:TA-heading-example.png]] [[Image:TA-show-example.png]] [[Image:TA-text-example.png]] [[Image:TA-image-example.png]] |
====descriptions (1)==== | ====descriptions (1)==== | ||
Revision as of 20:37, 6 May 2009
The Turtle Palette (green)
examples (1)
descriptions (1)
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Clean | clear the screen and reset the turtle to center, pointed up (pen down, bright red) |
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Forward (number) | move turtle forward |
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Back (number) | move turtle backward |
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Left (angle in degrees) | turn turtle counterclockwise |
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Right (angle in degrees) | turn turtle clockwise |
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Arc (angle in degrees,radius) | move turtle along an arc |
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Setyx (xcor, ycor) | move turtle to position (xcor, ycor) [(0, 0) is in the center of the screen.] |
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Seth (heading) | set the heading of the turtle [0 is towards the top of the screen.] |
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Show (media) | draw text, images, or play sounds |
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Set scale (media) | Set the scale of images |
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Container | Load a media object from the Journal (plugs into the Show block) |
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X coordinate | holds current x-coordinate value of the turtle (can be used in place of a number block) |
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Y coordinate | holds current y-coordinate value of the turtle (can be used in place of a number block) |
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Heading | holds current heading value of the turtle (can be used in place of a number block) |
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Scale | holds current scale value |
Turtle state values (can plug into a parameter):
- X, Y – Zeros for each are at center screen. Negative values are left and down; positive values are right and up.
- Heading – Zero is pointed up. Heading is in degrees clockwise.
- Angles are degrees from 0 to 360 (for larger values and smaller values all multiples of 360 are subtracted or added to get the value into the range 0..360).
- Examples: 90 means a right angle (90 degrees), clockwise; –30 means a 30-degree angle, counterclockwise