El Camuflaje se encuentra en todas partes en la naturaleza, ya que es una tendencia de muchos animales quedarse paralizados cuando están asustados. Este proyecto ayudará a los estudiantes a ver una explicación plausible de por qué los animales se "congelan" cuando se ven amenazados. ¿Te puedes imaginar cómo los animales se comportan cuando están en peligro? Para tener una comprensión de esto, usted Inventará un animal y su entorno, de manera tal que pueda camuflarse y describir su comportamiento ¿? . Deje que este proyecto lo Inspire para crear rompecabezas o láminas móviles.
Halo, nombre, herramienta de pintado, guiones, incrementar por.
(Idea original de Alan Kay)
Primero, abrir un nuevo proyecto. Tu puedes hacer esto abriendo Etoys y presionando sobre la nube lila que dice"Comenzar un proyecto". Ahora tienes todo el mundo Etoys a tu disposición. Vamos a comenzar pintando algo de hierba y un saltamontes.
Para pintar objetos en Etoys existe la herramienta de pintado en la barra de navegación ubicada en la parte superior de la ventana. Presiona en el ícono que se muestra arriba y obtendrás una hoja de papel nueva y las herramientas para pintar en ella
Every time you click on the icon, you will open a new sheet and start a new painting. You need to make two paintings here, one for the grasshopper and one for the grass. Make sure you quit the painting tool when you finish a drawing.
You can find out how to use all the elements of the painting tool in the Etoys Quick Guides - Paint Tools and get an overview in the Getting Help chapter of this book.
The drawings you made are in fact objects you can pick up and move around. They will be called "sketch" until you give it another name.
To give your drawing another name, you need to bring up the Halo for this object. You can do this by right-clicking on this object (cmd-click on a Mac). Now you see a number of colored icons around the object and the name of the object on the bottom. Click on "sketch" and type the name you want.
Now put the grasshopper in the grass, and you can see right away why its green color might help it escape from birds and other predators that might want to eat it.
Now let’s write the simplest of scripts for the grasshopper to get it to move sideways in the left-right direction (the official name for this direction is x). The world in Etoys is a two-dimensional coordinate system with x being the value of the horizontal position of an object (starting with 0 at the left side).
In Etoys, writing a script actually means to compose a script using the tiles available for the objects. You find the tiles for each object in it's Viewer. Bring up the Viewer for an object by clicking on the blue eye icon on the halo. The viewer for the grasshopper will look like this:
You'll see the "Grasshopper's x tile" under the heading "basic" (which stands for category basic) in the upper half of the viewer.
Drag the tile onto the Etoys world, using the white arrow, and it will create a script editor around it the moment you drop it. If that doesn't happen, try again and make sure, you grab it at the white arrow shown in the image above.
Now you can change the command to let it perform the action you want. Clicking on the white arrow in the command tile will bring up a menu of operations where you choose "increase by" to move the grasshopper from left to right. You can change the value for "increase by" by clicking on the number and typing in another one. Find more help in the Quick Guides - Script Tiles - X and Y Tiles.
Now run the script by clicking on the clock in the top line of the script editor. The script will repeatedly execute the command until you click the clock again to stop it.
All of a sudden you can see where the grasshopper is, and so can most other animals. Now you have a little insight into why animal vision is almost always better at detecting motion than in seeing fine details – and also, why animals might want to keep still when threatened.
When you are finished, you'll want to save your work for later use or to show it to your friends and family. You can also make different versions based on the ideas you have.
The button you see above is the "publish" button. Find it in the navigation bar and click it. A dialogue box will open. It asks you to put in a name for your project (to make it easier to find it again later). You can put in your name in the author field, a description and other information if you want. Click "Ok" and you will get another dialog box where you can choose the destination for your project. The default location is the Etoys folder on your computer. It is strongly recommended to save all your projects there, because this is the folder which will be presented by default when you are going to load a project.
To get a project out of your folder, click the "find" button on the navigator bar. It will present all the projects you have saved so far in your Etoys folder. Select the one you want and click "Ok". The new project will open in Etoys. To get back to the previous project, use the white arrows in the navigator bar.
For more information about loading and saving from different locations etc., look at the Quick Guides Navigator Bar - Keep Find Projects.
You can find the project used in this chapter here: http://etoysillinois.org/library?sl=2147
If a creature like a grasshopper lived in a desert environment, what color would you expect it to be? Can you create a project for that?
With the things you learned in this chapter, you can do many wonderful paintings with moving objects in it.
Or you can create a puzzle as you can see here in Avigail Snir's projects for students from 1st grade and up http://etoysillinois.org/library?sl=760
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