# vrcoordm2vr

Convert MATLAB coordinates to VR coordinates

Since R2019a

## Syntax

``vr = vrcoordm2vr(m)``

## Description

example

````vr = vrcoordm2vr(m)` converts a point with coordinates in the MATLAB® coordinate system to the Virtual World coordinate system.```

## Examples

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This example is a variation of the Car in the Mountains example, with the coordinates for translation specified in MATLAB coordinate system.

Create a `vrworld` object representing the virtual world and open it.

```world = vrworld('vrmount'); open(world); view(world); ```

Identify the nodes in the virtual world using the `nodes` command

`nodes(world)`
```View1 (Viewpoint) [VR Car in the Mountains] Camera_car (Transform) [VR Car in the Mountains] VPfollow (Viewpoint) [VR Car in the Mountains] Automobile (Transform) [VR Car in the Mountains] Wheel (Shape) [VR Car in the Mountains] Tree1 (Group) [VR Car in the Mountains] Wood (Group) [VR Car in the Mountains] Canal (Shape) [VR Car in the Mountains] ElevApp (Appearance) [VR Car in the Mountains] River (Shape) [VR Car in the Mountains] Bridge (Shape) [VR Car in the Mountains] Road (Shape) [VR Car in the Mountains] Tunnel (Transform) [VR Car in the Mountains]```

Access the `Automobile` `vrnode` object by assigning it to a handle

`car = world.Automobile`
```car = vrnode object: 1-by-1 Automobile (Transform) [VR Car in the Mountains]```

Move the car along the first section of the road.

```xz_my = zeros(12,3); xz_my(:,2) = 1:12; xz_my(:,1) = 3; xz_my(:,3) = -0.25; for idx = 1:length(xz_my) car.translation = vrcoordm2vr(xz_my(idx,:)); vrdrawnow; pause(0.1); end ```

Rotate the car a little to get to the second part of the road. This is done by setting the `rotation` property of the `Automobile` node.

```car.rotation = [0 1 0 -0.7]; vrdrawnow; ```

Move the car through the second section of the road

```z2 = 12:26; x2 = 3:1.4285:23; y2 = -0.25 + zeros(size(z2)); xz_my2 = [x2' z2' y2']; for idx = 1:length(xz_my2) car.translation = vrcoordm2vr(xz_my2(idx,:)); vrdrawnow; pause(0.1); end ```

Rotate the car once again to face the third stretch of the road and continue to the end.

```car.rotation = [0 1 0 0]; x3 = 23:43; z3 = 26 + zeros(size(x3)); y3 = -0.25 + zeros(size(z3)); xz_my3 = [x3' z3' y3']; for idx = 1:length(xz_my3) car.translation = vrcoordm2vr(xz_my3(idx,:)); vrdrawnow; pause(0.1); end ```

## Input Arguments

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Coordinates of a point in MATLAB notation, specified as a 3-element row vector.

Data Types: `single` | `double`

## Output Arguments

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Coordinates of a point in VRML notation, returned as a 3-element row vector.

Data Types: `single` | `double`

## Version History

Introduced in R2019a