# Coding Questions **URL:** https://discourse.processing.org/c/processing/processing-questions/15.md?page=107 [Latest](https://discourse.processing.org/latest.md) · [Categories](https://discourse.processing.org/categories.md) · [Tags](https://discourse.processing.org/tags.md) **Page:** 108 --- ## [How to find location of random object](https://discourse.processing.org/t/how-to-find-location-of-random-object/18061)

**Author:** [@NotConsumable](https://discourse.processing.org/u/NotConsumable)\ **Replies:** 3\ **Last updated:** [February 24, 2020, 11:57am UTC](https://discourse.processing.org/t/how-to-find-location-of-random-object/18061 "2020-02-24T11:57:01Z")

so I am trying to make a hot and cold game and i have a randomly generated ellipse and i was wondering how to find the location of the ellipse in relation to my mouse so whenever i click it shows me how far away i am fro… --- ## [Repeating shapes](https://discourse.processing.org/t/repeating-shapes/18033)

**Author:** [@Mythikal](https://discourse.processing.org/u/Mythikal)\ **Replies:** 1\ **Last updated:** [February 23, 2020, 7:03am UTC](https://discourse.processing.org/t/repeating-shapes/18033 "2020-02-23T07:03:37Z")

I have a player I want to control with the arrow keys. I can’t figure out for the life of me how to stop the objects the player is made out of (an ellipse and rectangle) from repeating after moving. I’m sure the solutio… --- ## [Executing shell commands](https://discourse.processing.org/t/executing-shell-commands/18000)

**Author:** [@pandl](https://discourse.processing.org/u/pandl)\ **Replies:** 2\ **Last updated:** [February 23, 2020, 12:54am UTC](https://discourse.processing.org/t/executing-shell-commands/18000 "2020-02-23T00:54:38Z")

I’m trying to run an executable file as follows: void setup() { noLoop(); } void draw() { launch("/usr/bin/gpsbabel"); launch("/usr/bin/gpsbabel -i gpx -f /home/phil/Downloads/test3.gpx -o garmin -F /dev/ttyUSB0")… --- ## [Check boolean method in all instances for true/false](https://discourse.processing.org/t/check-boolean-method-in-all-instances-for-true-false/18022)

**Author:** [@slow\_izzm](https://discourse.processing.org/u/slow_izzm)\ **Replies:** 12\ **Last updated:** [February 22, 2020, 11:01pm UTC](https://discourse.processing.org/t/check-boolean-method-in-all-instances-for-true-false/18022 "2020-02-22T23:01:24Z")

This is not scalable, what is the correct way to go about checking to see if the boolean method in all instances are false, rather than && each instance? for (Button b : buttons) { b.render(); if (b.isHovering(… --- ## [Saving/Storing a multidimensional array](https://discourse.processing.org/t/saving-storing-a-multidimensional-array/16391)

**Author:** [@Baz](https://discourse.processing.org/u/Baz)\ **Replies:** 4\ **Last updated:** [December 18, 2019, 12:31am UTC](https://discourse.processing.org/t/saving-storing-a-multidimensional-array/16391 "2019-12-18T00:31:54Z")

For a project of mine I want to create a function that can save a 3d double or a 2d double array such as I can recover what was inside if I restart the program. I think you can do that in JSON, but I never used it, and I… --- ## [How to increment a variable on a timer?](https://discourse.processing.org/t/how-to-increment-a-variable-on-a-timer/17984)

**Author:** [@abc](https://discourse.processing.org/u/abc)\ **Replies:** 1\ **Last updated:** [February 21, 2020, 8:50pm UTC](https://discourse.processing.org/t/how-to-increment-a-variable-on-a-timer/17984 "2020-02-21T20:50:01Z")

My goal was to make the background color change every 4 seconds, yet I can’t seem to figure out what I should use to allow my variable to continuously increase, right now the color stays the same. what do I need to add … --- ## [How to make spikes](https://discourse.processing.org/t/how-to-make-spikes/17935)

**Author:** [@DMTR](https://discourse.processing.org/u/DMTR)\ **Replies:** 31\ **Last updated:** [February 21, 2020, 2:41pm UTC](https://discourse.processing.org/t/how-to-make-spikes/17935 "2020-02-21T14:41:25Z")

Hey, i am new user in processing and java. Im creating my first game, and i need help of making randomly spawning objects that kills you if you hit it. I want those objects spawn to right and going to left (player is i… --- ## [Reversing Random Distribution](https://discourse.processing.org/t/reversing-random-distribution/17427)

**Author:** [@PhilRandom](https://discourse.processing.org/u/PhilRandom)\ **Replies:** 2\ **Last updated:** [February 20, 2020, 7:20pm UTC](https://discourse.processing.org/t/reversing-random-distribution/17427 "2020-02-20T19:20:04Z")

Hello Fellow Coders, Phil Again, It seems that I have run into another coding predicament…oops. I have successfully coded a random distribution descending code that changes color when reaching the bottom of the canvas… --- ## [Lat long to screen coordinates from database](https://discourse.processing.org/t/lat-long-to-screen-coordinates-from-database/17434)

**Author:** [@katniss0809](https://discourse.processing.org/u/katniss0809)\ **Replies:** 1\ **Last updated:** [February 20, 2020, 6:56pm UTC](https://discourse.processing.org/t/lat-long-to-screen-coordinates-from-database/17434 "2020-02-20T18:56:41Z")

I have a set of coordinates (more than 100 points) from a JDBC connection and I want to display them on Processing canvas. However, the coordinates are in latitude and longitude, e.g (42.3541, -72.1675), how can I transf… --- ## [Shape (two parameters)](https://discourse.processing.org/t/shape-two-parameters/17465)

**Author:** [@paulstgeorge](https://discourse.processing.org/u/paulstgeorge)\ **Replies:** 1\ **Last updated:** [February 19, 2020, 4:51am UTC](https://discourse.processing.org/t/shape-two-parameters/17465 "2020-02-19T04:51:50Z")

I am trying to understand shape() and its two parameters. In this simple example below I have used createShape() to make two spheres. Spheres, in my world, are three-dimensional. All is fine until I get to position the s… --- ## [Why can't use mouseX in pixels processing](https://discourse.processing.org/t/why-cant-use-mousex-in-pixels-processing/17926)

**Author:** [@fang1](https://discourse.processing.org/u/fang1)\ **Replies:** 2\ **Last updated:** [February 20, 2020, 2:39am UTC](https://discourse.processing.org/t/why-cant-use-mousex-in-pixels-processing/17926 "2020-02-20T02:39:07Z")

hello,guys! I’m sorry to borther you a little time about the problem I meeting in using mouseX,mouseY in loops of pixels location array.I find a code linkin this situation can run,but it doesn’t work on my processing sof… --- ## [Uber KML Icosahedron](https://discourse.processing.org/t/uber-kml-icosahedron/17601)

**Author:** [@HackinHarry](https://discourse.processing.org/u/HackinHarry)\ **Replies:** 2\ **Last updated:** [February 20, 2020, 1:02am UTC](https://discourse.processing.org/t/uber-kml-icosahedron/17601 "2020-02-20T01:02:05Z")

Somehow I ended up reading Uber’s articles on H3, a library they wrote to divide up their markets into hexagons. They have a github page : \[https://github.com/uber/h3/blob/master/KML/icosa.kml#L204\] that uses kml to d… --- ## [Web loadStrings](https://discourse.processing.org/t/web-loadstrings/17923)

**Author:** [@juanjoc](https://discourse.processing.org/u/juanjoc)\ **Replies:** 2\ **Last updated:** [February 19, 2020, 11:59am UTC](https://discourse.processing.org/t/web-loadstrings/17923 "2020-02-19T11:59:46Z")

Hi guys Im working with data extraction of the web. I tried to use examples like the following String\[\] rawhtml; String \[\] shows; String html; int j = 0; void setup(){ rawhtml = loadStrings("\ **Author:** [@BrokenCode](https://discourse.processing.org/u/BrokenCode)\ **Replies:** 15\ **Last updated:** [February 19, 2020, 6:45pm UTC](https://discourse.processing.org/t/time-synched-animation/17685 "2020-02-19T18:45:53Z") Hello everyone, here I’m trying to divide the screen with a grid, then fill each tile in a pre-determined amount of time: (this is the most simplified - even silly - example) float timeToConsume = 7, timeToCancelBin; in… --- ## [Creating a structure of linked tetrahedra](https://discourse.processing.org/t/creating-a-structure-of-linked-tetrahedra/16955)

**Author:** [@dauwpunt](https://discourse.processing.org/u/dauwpunt)\ **Replies:** 13\ **Last updated:** [February 19, 2020, 1:41pm UTC](https://discourse.processing.org/t/creating-a-structure-of-linked-tetrahedra/16955 "2020-02-19T13:41:12Z")

Hi there. I am trying to generate a 3D landscape of tetrahedra, so to say, and I’m having some trouble with the mathematics and coding of it. I’m also still quite new to Processing! If I am not being clear enough about s… --- ## [Problem making a wrap around loop with modulo](https://discourse.processing.org/t/problem-making-a-wrap-around-loop-with-modulo/17851)

**Author:** [@debxyz](https://discourse.processing.org/u/debxyz)\ **Replies:** 9\ **Last updated:** [February 19, 2020, 2:09am UTC](https://discourse.processing.org/t/problem-making-a-wrap-around-loop-with-modulo/17851 "2020-02-19T02:09:59Z")

I’m trying to make a wrap around loop with modulus. But it’s not working. Keep getting error “expecting {, found \[”. Showing function for loop appears in. If anyone can help, many thanks! color\[\]getThreeColorLerp() { … --- ## [Colour changing! (get the values to go back)](https://discourse.processing.org/t/colour-changing-get-the-values-to-go-back/17909)

**Author:** [@Mythikal](https://discourse.processing.org/u/Mythikal)\ **Replies:** 2\ **Last updated:** [February 18, 2020, 5:02pm UTC](https://discourse.processing.org/t/colour-changing-get-the-values-to-go-back/17909 "2020-02-18T17:02:44Z")

I am working on a small project and I want the stoke of the lines I’m using to slowly gradient through different colours. I have an array called “col” with three integers for each RGB value. Each are set to 255 and each… --- ## [Using mouse button events while developing sketches in the Eclipse IDE](https://discourse.processing.org/t/using-mouse-button-events-while-developing-sketches-in-the-eclipse-ide/17389)

**Author:** [@spflanze](https://discourse.processing.org/u/spflanze)\ **Replies:** 8\ **Last updated:** [February 18, 2020, 2:17pm UTC](https://discourse.processing.org/t/using-mouse-button-events-while-developing-sketches-in-the-eclipse-ide/17389 "2020-02-18T14:17:47Z")

I am developing a Processing sketch in the Eclipse IDE. I have a basic test sketch running in it. Now I need to add a menu, and in my attempt to do it I am using the information in this webpage: https://www.processing.… --- ## [NullPointerExeption when using img.get()](https://discourse.processing.org/t/nullpointerexeption-when-using-img-get/17872)

**Author:** [@Parzivalius](https://discourse.processing.org/u/Parzivalius)\ **Replies:** 9\ **Last updated:** [February 18, 2020, 8:22am UTC](https://discourse.processing.org/t/nullpointerexeption-when-using-img-get/17872 "2020-02-18T08:22:23Z")

Hey, I am trying to get the values of a pixel in an image as well as the values of the pixels around it, however the get() function is returning a null pointer exception. Most likely something wrong in my code: void fe… --- ## [Find y coordinate of point on line (given x)](https://discourse.processing.org/t/find-y-coordinate-of-point-on-line-given-x/17731)

**Author:** [@plux](https://discourse.processing.org/u/plux)\ **Replies:** 2\ **Last updated:** [February 18, 2020, 12:19pm UTC](https://discourse.processing.org/t/find-y-coordinate-of-point-on-line-given-x/17731 "2020-02-18T12:19:36Z")