App Inventor 2
Programming mobile phones with Android 
by App Inventor 2 - Juan Antonio Villalpando

- Initiation Tutorial App Inventor 2 -

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55.- Vectors.

ip55_vectors

- Presentation.

- We click anywhere on the screen, we draw a vector and shows the horizontal and vertical component and its angle.

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Design

- Insert a Canvas, a Button and a Label.

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Blocks.

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- If the angle is greater than 180 is negative, so we add 360 to make it positive.

- On the screen coordinates increase from top to bottom and left to right.

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56.- Decompose vector

ip56_descompose_vector

- Presentation.

- The application consists of two parts, one we write the vertical and horizontal component of a vector, when we press the button calculates module and angle.

- If we introduce the module and angle and click the second button, we will calculate the horizontal and vertical component.

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Design

- We put the items in Bold.

- At TextBox you delete the contents of the Property Hints.

- In the TextBox mark the box NumberOnly.

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Blocks.

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