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poseplot

Description

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poseplot plots the pose (position and orientation) at the coordinate origin position with zero rotation. The default navigation frame is the north-east-down (NED) frame.

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poseplot(quat) plots the pose with orientation specified by a quaternion quat. The position by default is [0 0 0].

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poseplot(R) plots the pose with orientation specified by a rotation matrix R. The position by default is [0 0 0].

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poseplot(___,position) specifies the position of the pose plot.

poseplot(___,frame) specifies the navigation frame of the pose plot.

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poseplot(___,Name=Value) specifies pose patch properties using one or more name-value arguments. For example, poseplot(PatchFaceColor="r") plots the pose with red face color. For a list of properties, see PosePatch Properties.

poseplot(ax,___) specifies the parent axes of the pose plot.

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p = poseplot(___) returns the PosePatch object. Use p to modify properties of the pose patch after creation. For a list of properties, see PosePatch Properties.

Examples

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Plot the default pose using the poseplot function with default settings.

poseplot
xlabel("North-x (m)")
ylabel("East-y (m)")
zlabel("Down-z (m)");

Figure contains an axes object. The axes object is empty.

Next, plot a pose with specified orientation and position.

q = quaternion([35 10 50],"eulerd","ZYX","frame");
position = [1 1 1];
poseplot(q,position)

Figure contains an axes object. The axes object is empty.

Then, plot a second pose on the figure and return the PosePatch object. Plot the second pose with a smaller size by using the ScaleFactor name-value argument.

hold on
p = poseplot(eye(3),[5 5 5],ScaleFactor=0.5)
p = 
  PosePatch with properties:

    Orientation: [3x3 double]
       Position: [5 5 5]

  Show all properties

legend("First Pose","Second Pose")
hold off

Figure contains an axes object. The axes object is empty. These objects represent First Pose, Second Pose.

Animate a series of poses using the poseplot function. First, define the initial and final positions.

ps = [0 0 0];
pf = [10 0 0];

Then, define the initial and final orientations using the quaternion object.

qs = quaternion([45,0,0],'eulerd','ZYX','frame');
qf = quaternion([-45,0,0],'eulerd','ZYX','frame');

Show the starting pose.

patch = poseplot(qs,ps);
ylim([-2 2])
xlim([-2 12])
xlabel("North-x (m)")
ylabel("East-y (m)")
zlabel("Down-z (m)");

Figure contains an axes object. The axes object is empty.

Change the position and orientation continuously using coefficients, and update the pose using the set object function.

for coeff = 0:0.01:1
    q = slerp(qs,qf,coeff);
    position = ps + (pf - ps)*coeff;
    set(patch,Orientation=q,Position=position); 
    drawnow
end

Figure contains an axes object. The axes object is empty.

Plot orientations and positions in meshes using the poseplot function. First, plot a ground vehicle at the origin with zero rotation.

poseplot(ones("quaternion"),[0 0 0],MeshFileName="groundvehicle.stl",ScaleFactor=0.3);
xlabel("North-x (m)")
ylabel("East-y (m)")
zlabel("Down-z (m)")

Figure contains an axes object. The axes object is empty.

Second, plot a rotor at the position [20 20 -20] with zero rotation.

hold on
poseplot(ones("quaternion"),[20 20 -20],MeshFileName="multirotor.stl",ScaleFactor=0.2);

Figure contains an axes object. The axes object is empty.

Lastly, plot a fixed-wing aircraft at the position [5 5 -40] with zero rotation.

poseplot(ones("quaternion"),[5 5 -40],MeshFileName="fixedwing.stl",ScaleFactor=0.4);
view([-37.8 28.4])
hold off

Figure contains an axes object. The axes object is empty.

Input Arguments

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Quaternion, specified as a quaternion object.

Rotation matrix, specified as a 3-by-3 orthonormal matrix.

Example: eye(3)

Position of the pose plot, specified as a three-element real-valued vector.

Example: [1 3 4]

Navigation frame of the pose plot, specified as "NED" for the north-east-down frame or "ENU" for the east-north-up frame.

When the parent axes status is hold off, specifying the NED navigation frame reverses the y- and z-axes in the figure by setting the YDir and ZDir properties of the parent axes.

Parent axes of the pose plot, specified as an Axes object. If you do not specify the axes, the poseplot function uses the current axes.

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.

Example: poseplot(PatchFaceAlpha=0.1)

The PosePatch properties listed here are only a subset. For a complete list, see PosePatch Properties.

Orientation of the pose plot, specified as a quaternion object or a rotation matrix.

Position of the pose plot, specified as a three-element real-valued vector.

Name of Standard Triangle Language (STL) mesh file, specified as a string scalar or a character vector containing the name of the mesh file. When you specify this argument, the poseplot function plots the mesh instead of the orientation box.

Scale factor of the pose plot, specified as a nonnegative scalar. The scale factor controls the size of the orientation box. When you specify the MeshFileName argument, the scale factor also changes the scale of the mesh.

Patch face color, specified as an RGB triplet, a hexadecimal color code, a color name, or a short name.

  • An RGB triplet is a three-element row vector whose elements specify the intensities of the red, green, and blue components of the color. The intensities must be in the range [0, 1]; for example, [0.4 0.6 0.7].

  • A hexadecimal color code is a character vector or a string scalar that starts with a hash symbol (#) followed by three or six hexadecimal digits, which can range from 0 to F. The values are not case sensitive. Thus, the color codes "#FF8800", "#ff8800", "#F80", and "#f80" are equivalent.

Here is a list of commonly used colors and their corresponding values.

Color NameShort NameRGB TripletHexadecimal Color CodeAppearance
"red""r"[1 0 0]"#FF0000"

Sample of the color red

"green""g"[0 1 0]"#00FF00"

Sample of the color green

"blue""b"[0 0 1]"#0000FF"

Sample of the color blue

"cyan" "c"[0 1 1]"#00FFFF"

Sample of the color cyan

"magenta""m"[1 0 1]"#FF00FF"

Sample of the color magenta

"yellow""y"[1 1 0]"#FFFF00"

Sample of the color yellow

"black""k"[0 0 0]"#000000"

Sample of the color black

"white""w"[1 1 1]"#FFFFFF"

Sample of the color white

Patch face transparency, specified as a scalar in range [0, 1]. A value of 1 is fully opaque and 0 is completely transparent.

Output Arguments

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Pose patch object, returned as a PosePatch object. You can use the returned object to query and modify properties of the plotted pose. For a list of properties, see PosePatch Properties.

Introduced in R2021b