Netlogo shown today: Create 16 turtles Move forward 6 turtle steps ----------------- --------------------------- cro 16 fd 6 Put your pen down Lift your pen (or turtle tail) up ----------------- --------------------------------- pd pu Turn right 90 degrees Clear all (erase everything) --------------------- ---------------------------- rt 90 ca Draw a square (if your Pen is Down - PD you will see square) ------------------------------------------------------------ repeat 4 [ fd 3 rt 90 ] The above square has a side length of 3 Draw a cool pattern of 36 spiralling squares (if PD pen down) ------------------------------------------------------------- repeat 36 [ rt 10 repeat 4 [ fd 3 rt 90 ] ] What is 36 times 10? 360 degrees. So you will have a complete round the world circle of squares. Observer mode commands: ca, cro, Turtles mode commands: fd, rt, pd, pu Note: repeat is used in either mode, depending on what you need to do. repeat howManyTimes [ what you want to do ] What would the following repeat create, if we assume the pens of the turtles were down (PD or pd) so we could see the trail left by the turtle tails (or pens, aka pens)? repeat 8 [ fd 3 rt 45 ] <---- draws what???? repeat 4 [ fd 3 rt 90 ] <---- draws a square
Netlogo is also available at most of the computer labs on the UNI campus, including all CNS labs and all of the SCC (Student Computer Center) labs like the Library, Union, Redeker, Towers, Lawther, etc.
1. Understand it. Focus on WHAT the problem is. Dr. Peter Venkman represents this phase of programming, problem solving, troubleshooting, and model development. Listening attitude. WHAT to do. Draw a square with the program. Have the turtle draw a square for NetLOGO. Or have the CAT draw a square for SCRATCH. 2. Develop a PLAN for HOW to solve it. How to get from the GIVEN INPUT to the GOAL, RESULT, OUTPUT. The PLAN is also known as an algorithm. It is like a recipe, a step by step outline and series of simple steps to arrive at the GOAL starting from the GIVEN input. Dr. Raymond Stantz represents this phase of problem solving. The PLAN is written in informal language and is often called pseudocode. Put the pen down for drawing Repeat the following 4 times draw a line 5 units long (or 100 units long for SCRATCH) turn right 90 degrees 3. Code it. Dr. Egon Spengler is the character that represents this phase or step of problem solving. Translate the PLAN into the language of the computer software. Write the Scratch or the NetLOGO code. Write the C++ or the Ada or the Python or the Java program. Or translate the series of steps and do them on Photoshop or Adobe After Effects or Microsoft Excel or Adobe Flash. PD Actual NetLOGO code. REPEAT 4 [ fd 5 (Had to be 100 for SCRATCH big cat) rt 90 ] These steps apply to mathematics, computer science and much more.
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