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Creating a program to make a shape

Creating a program to make a shape. Open the chrome browser Search for Blockly Turtle. Drawing shapes using a repeat loop. Task Copy this script change the: Repeat to 3 a nd the Turn to 120 What happens?. Creating a stepping loop using the Variable i. Variable i. Step.

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Creating a program to make a shape

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  1. Creating a program to make a shape Open the chrome browser Search for Blockly Turtle

  2. Drawing shapes using a repeat loop Task Copy this script change the: Repeat to 3 and the Turn to 120 What happens?

  3. Creating a stepping loop using the Variable i Variable i Step Upper limit (end) The VARIABLEi is a value that changes each time the loop is executed (run) A common mistake when people learn stepping loops it to misread i as a 1. You can use any letter you like Task. Copy this script. Lets change the variable to J change the upper limit to 8 and step 2. What happens? https://blockly-demo.appspot.com/static/apps/turtle/index.html#cbzn2z

  4. Using a procedure AKA subroutine • Procedures are used to complete distinct (separate) tasks • To run a procedure you need to use a call or execute command. There are many ways to solve problems This is the execute call command

  5. Using a procedure inside another Procedure (Nesting) Use the DrawSquare procedure as before. We are going to make a pattern Using the DrawSquare routine to draw petals of a flower. Create a procedure called FlowerPattern This new procedure must Repeat theDrawSquareroutine 36 times Each petal must rotate by 10 degrees https://blockly-demo.appspot.com/static/apps/turtle/index.html#wcysxu

  6. Improving our program Using random to select line colours What happens if I move the colour script here? • What happens if I put this colour script here?

  7. OK but Squares are boring! We can draw any shape if we know the Number of sides and The interior angles • You can see that there is a relationship between the number of sides and the internal angles. Look at this site

  8. Using a rule The inside angle of any shape is related to the number of sides. E.g. 4 sides = 90 degrees 360 degrees divided by the No of Sides of any shape Or to put it another way 360/the number of sides We can create a variable for the number of sides we want. Create a variable NumberOfSides Create a variable InternalAngle Set NumberOfSidesto 4 It would be useful to define the SideLengthalso create a variable to store this. Make the SideLength=30

  9. Using a mathematical rule in a Variable

  10. Use variables in your DrawShape routine This now DrawShape execute call will run the procedure if it is placed on the stage. https://blockly-demo.appspot.com/static/apps/turtle/index.html#j852aj

  11. https://blockly-demo.appspot.com/static/apps/turtle/index.html#o3gvhhhttps://blockly-demo.appspot.com/static/apps/turtle/index.html#o3gvhh Create a procedure called RunShapeArt Create a loop to create rotated repetitions of the shape. This is similar to the flower loop that you’ve already practised.

  12. Using BlocklyMinecraft

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