terrainHeight

Returns terrain height in UAV scenarios

Syntax

heights = terrainHeight(scene,x,y)

heights = terrainHeight(___,Name,Value)

Description

heights = terrainHeight(scene,x,y) returns the terrain heights of the specified xy-positions for the terrain data for a uavScenario object.

heights = terrainHeight(___,Name,Value) specifies additional options using name-value arguments. Enclose each Name in quotes.

Examples

Add Terrain and Building Meshes to UAV Scenario

Add Terrain Mesh to UAV Scenario

Create a UAV scenario with a specified reference location.

scenario = uavScenario(ReferenceLocation=[39.5 -105.5 0]);

Add custom terrain data from the n39_w106_3arc_v2.dt1 DTED file.

addCustomTerrain("CustomTerrain","n39_w106_3arc_v2.dt1");

Add the terrain mesh to the UAV scenario.

addMesh(scenario,"terrain",{"CustomTerrain",[-200 200],[-200 200]},[0.6 0.6 0.6]);

Show the UAV scenario.

show3D(scenario);

Add Building Mesh to UAV Scenario

Specify the building mesh centers, heights, and boundaries.

Tip: Use the terrainHeight function to obtain ground height for each build base.

buildingCenters = [-50 -50;100 100];
buildingHeights = [30 100];
buildingBoundary = [-25 -25; -25 50; 50 50; 50 -25];

Add the building mesh to the UAV scenario.

for idx = 1:size(buildingCenters,1)
    buildingVertices = buildingBoundary+buildingCenters(idx,:);
    buildingBase = min(terrainHeight(scenario,buildingVertices(:,1),buildingVertices(:,2)));
    addMesh(scenario,"polygon",{buildingVertices,buildingBase+[0 buildingHeights(idx)]},[0.3922 0.8314 0.0745]);
end

Show the UAV scenario.

show3D(scenario);
view([0 15])

Remove Custom Terrain

Remove the custom terrain that was imported.

removeCustomTerrain("CustomTerrain")

Input Arguments

scene — UAV scenario

uavScenario object

UAV scenario, specified as a uavScenario object.

x — x-positions in scenario

vector | matrix

x-positions in scenario specified as a vector or matrix of scalar values in meters. If specified as a matrix, the y input and heights output are also a matrix of the same size.

Example: [1 2 0.5 -0.97]

Data Types: double

y — y-positions in scenario

vector | matrix

y-positions in scenario specified as a vector or matrix of scalar values in meters. If specified as a matrix, the x input and heights output are also a matrix of the same size.

Example: [1 2 0.5 -0.97]

Data Types: double

Name-Value Arguments

Specify optional pairs of arguments as Name1=Value1,...,NameN=ValueN, where Name is the argument name and Value is the corresponding value. Name-value arguments must appear after other arguments, but the order of the pairs does not matter.

Before R2021a, use commas to separate each name and value, and enclose Name in quotes.

Example: h = terrainHeight(scene,x,y,"UseLatLon",true) uses latitude and longitude for the x and y inputs.

UseLatLon — Enable latitude and longitude coordinates

false (default) | true

Enable latitude and longitude coordinates, specified as true or false.

• When specified as true, the x and y coordinates are interpreted as longitude and latitude, respectively.

• When specified as false, the x and y coordinates are interpreted as Cartesian coordinates.

ReferenceFrame — Reference frame of coordinates

"ENU" (default) | name of defined inertial frame

Reference frame of coordinates, specified as an inertial frame name defined in the InertialFrames property of the uavScenario object scene. You can add new inertial frames to the scenario using the addInertialFrame object function.

Output Arguments

heights — Terrain heights at each position

vector | matrix

Terrain heights at each position, returned as a vector or matrix of scalar values in meters. If returned as a matrix, the x and y inputs are also a matrix of the same size.

Example: [1 2 0.5 -0.97]

Data Types: double

Version History

Introduced in R2021a