# Tagged Questions

Questions on position tracking, especially using Mathematica coordinate tracking functions and control objects such as Locator, LocatorPane, and ClickPane.

429 views

### How to dynamically update Locator[] constraints?

I need to visualize Menelaus' theorem for a triangle with moving locators for each of six points. So the vertexes of the triangle can move in any possible way, and the three points on the sides of the ...
714 views

### Constrain movement of a locator inside Manipulate

Once again a big thank you for the great help in my earlier post: Plotting function with Dynamic parameter. It totally worked out. I now have a new coding problem ...
142 views

### How do I constrain movement for lists of Locators using 2nd argument of Dynamic?

I need to display edge labels of a graph in a way that allows the edge labels to be moved. Locator seems the simplest and most obvious function to use. My ...
158 views

### Overlaying location pointer on to a png file

So I have started off with importing a png image of size $512\times 1024$ px. I have then created two locators as demonstrated on the Wolfram tutorials: ...
165 views

### Moving a locator based on the movement of another

My problem is: I want two Locators to simulate a vector in the following sense: The first Locator is the base and the second ...
198 views

### Manipulate a 2D point controlled simultaneously by Locator and its coordinates

I'm trying to have a point in the plane which can be manipulated both using Locator as well as inserting its $x$ and $y$ coordinates. My attempts at doing this are: ...
185 views

### How to restrict the motion of a Manipulate-generated Locator along a line?

If one uses a stand-alone locator and needs it to only be movable along a curve, say, defined by a function f[x], one can use a simple construct: ...
222 views

### Clicking to add/remove a Locator

I would like to add a Locator to a figure displayed by Manipulate when I click inside the figure, at the location where I click, ...
562 views

### Draw plot with locator & slider

I would like to create a plot whereby both the slider and the locator 'draw' the plot. In the following code, the locator & the slider act independently: ...
944 views

### Locator to show coordinates of plot

Old I would like to make the locator follow a plot, giving the coordinates as it moves. I don't really know where to start with this one, but I would like the dynamic plot to look something like this:...
112 views

### Constrain movement of Locator

Continuing the discussion started in the thread here, I've tried to recreate the code from scratch. I thus looked to constrain the movement of a locator to the graph defined by ...
268 views

### Using Manipulate with a control variable for selective recalculation

I'm trying to adapt Nasser's method for using a control variable inside Manipulate to selectively choose what part of the code should be recalculated depending on the controls changed. I've also read ...
198 views

### Circumnavigating a curve or going through it to show different behavior

I am not sure if what I want to do is possible in Mathematica. I've provided something simple below to convey what I want to do. Basically what I want to happen is that when the ...
180 views

### Manipulating several values from the same interval

Some of my calculations depend on the choice of several values from the interval [-2, 2] (it is more or less interpolation of a fixed function using the points as parameters). I want to create a ...