Wiki source code of Accelerometer

Last modified by dvd48 on 2020/06/14 20:25
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2 [[image:t-rex.gif||class="img-rounded"]]
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6 Use the phone sensors to create a t-rex detector. Now you know if a dino or a person is creeping up. Follow these steps to create a first version. Remix it afterwards and create something personal.
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11 == What bricks do you need? ==
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13 Create a new program and add the following object:
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16 [[image:object.png]]
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25 = Now add these scripts to the dot object: =
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27 **~1. Step**
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29 The **dot **which visualizes the vibration should start at the upper edge of your phone. Set the y-value to the maximum of your phone’s screen. In this example it is 960. Also set the size of the dot to a size you like.
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40 **2. Step**
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42 Now add the** pen down-brick**. From now on the **dot **object is drawing a line.
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45 [[image:2.png]]
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56 **3. Step**
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58 The **dot **is ready to move over the whole stage. To do this reduce the y-value by minus 1 for the whole screen height. The screen height can be easily computed by multiplying the maximum y-value with two.
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61 [[image:3.png]]
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69 **4. Step**
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71 You have to set the x-value of the **dot **according to the vibration. For this you can use a combination of the accelerations of the phone. Just add the accelerations of the x, y, and z direction and multiply the sum with the factor 100. You find the “acceleration_x”, “acceleration_y” and “acceleration_z” sensor value under the category device in the formula editor. Change the factor if you want the detector to react more or less sensitive.
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74 [[image:4.png]]
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81 == Remix Inspirations ==
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83 [[Change how the t-rex detector looks like>>https://share.catrob.at/pocketcode/program/31926]]
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85 [[Add functionality to the t-rex detector >>https://share.catrob.at/pocketcode/program/32735]]
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90 [[Download the program>>https://share.catrob.at/pocketcode/program/31927]]
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