Turtles is an “agentset”, the set of all turtles. Press the OK button to close the dialog.Just like creating a button, create a monitor by clicking the “Add” icon on the toolbar, selecting “Monitor” next to it, and clicking on an open spot in the Interface. Use the monitor to get real-time reporting on the states of model entities. Green sticky notes when you get this to work. Switch back to the Interface, click “setup” and “go”, and watch your turtles graze! Let’s create a structured environemnt through which they will move. Now we’ve got 100 turtles aimlessly moving around, completely unaware of anything else around them. We’d like to keep go as simple as possible, so that it is easy to understand.Įventually, it will include many other things you want to have happen as the model runs, such as calculating something or plotting the results.Įach of these things to do will have its own procedure and each procedure will have its own unique name. We could have, but during the course of building your model, it’s likely that you’ll add many other parts. Why couldn’t we have just written all of these commands in go instead of in a separate procedure? Green sticky notes when you’ve gotten this to work. Once finished adding the code, go back to the Interface, click setup to initialize and go to make your agents move. The “-“ combines “move” and “turtles” into a single name. Earlier, we used red - 2, with spaces, in order to subtract two numbers, but here we want move-turtles, without spaces. Note there are no spaces around the hyphen in move-turtles. The “Disable until ticks start” prevents you from pressing go before setup. The “Forever” checkbox makes the button stay down once pressed, so its commands run over and over again, not just once. Check the “Disable until ticks start” checkbox too.Check the “Forever” checkbox in the edit dialog.For Commands enter go instead of setup.Follow the same steps you used to make the setup button, except: It’s above the view and by default says “continuous”. Now that we’re using the tick counter (automatically created with reset-ticks), we should tell NetLogo that it only needs to update the view once per tick, instead of continuously updating it. Repeat to see the effects of the random initialization. Switch to the Interface tab and press the setup button you made before. end completes the definition of the “setup” procedure.reset-ticks starts the tick counter, now that setup is otherwise complete.That makes the turtle move to the point with those coordinates. Finally each turtle runs the setxy command with those two numbers as inputs. Then each turtle runs the reporter random-ycor, same for the Y axis. First each turtle runs the reporter random-xcor which will report a random number from the allowable range of turtle coordinates along the X axis. A reporter, as opposed to a command, reports a result. setxy random-xcor random-ycor is a command using “reporters”.After create-turtles we can put commands for the new turtles to run, enclosed by square brackets.They start out standing at the origin, that is, the center of patch 0,0.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |