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Mastering Development

Calculating line intersections with Python gave unexpected result

I have a ray casting program that finds the intersections of a ray and the edges of a polygon. In my code snippet below, I have the ray and edge in the form y = mx + b of a line. I defined a square by its vertices ((50, 50), (50, 70), (70, 70), (70, […]

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CMS Mastering Development Wordpress

Trying to embed content into HTML Tags

I have this code on my front-page.php $args = array( ‘post_type’ => ‘page’, ‘post__in’ => array(96,98,100,54,89,91,94,12), ‘orderby’=>’post__in’ ); $wp_query = new WP_Query( $args ); if ( $wp_query->have_posts() ) : while ( $wp_query->have_posts() ) : $wp_query->the_post(); get_template_part( ‘template-parts/page/content’, ‘front-page’ ); endwhile; else : // I’m not sure it’s possible to have no posts when this page […]

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Mastering Development

names are not defined when attempting to update time and reactants

#Im having issues with defining the T and X to run a Gillespie algorithm and using them to update time and reactants max_length = 1000 T[0] = 0 X[0,:] = [100, 0, 0] N = np.array([[-1, 1, 0],[0, -1, 1]]) while T(count,1) < time_limit or count <= max_length: a = [k1*X[count,0], k2*X[count,1]] a0 = sum(a) […]

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Mastering Development

JavaFX split space evenly between two side panels in an HBox

I have an HBox that contains a square VBox in the center. The HBox width can be made larger than it’s height, leaving extra space on the sides. I want to fill this extra space on the left and right with separate VBoxes where I will put buttons, info, etc. I want these two VBoxes, […]

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Database Development

How to update data with a trigger function and a join

I have two relations : CREATE TABLE relation_a (id_a int PRIMARY KEY, field_1 int); CREATE TABLE relation_b (id_b int PRIMARY KEY,fk_a int REFERENCES relation_a(id_a), field_1 int); INSERT INTO relation_a VALUES (1,100), (2,101), (3,102); INSERT INTO relation_b VALUES (1,1), (2,2), (3,3) I want to create a trigger which always set : SET b.field_1 = a.field_1 FROM […]

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Mastering Development

Depth Inaccuracies

I have been struggling with depth while creating a 3D engine in pure JavaScript using the HTML Canvas. Before I begin, I have to say that I am fairly new when it comes to coding 3D, so if I should change the way I coded something in particular to fix the problem, please let me […]

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Mastering Development

Creating cv2.VideoCapture() object directly from numpy array image data

The purpose is to take data from a virtual camera (from a camera in Gazebo simulation, updating every second) and use Detectron2 (requires data come from cv2.VideoCapture) to recognize other objects in the simulation. The virtual camera of course does not appear in lspci so I can’t simply use cv2.VideoCapture(0). So my code is bridge […]

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Game Creation Mastering Development

What does this all mean for the enemy?

This enemy JS file in a space shooting game was part of tutorial but there was no explanation to what is does and more importantly Why. Can you please help me explain what are these functions for & why they are used? class Enemy extends Sprite { constructor(divName, assetDesc, player, sequence) { super(divName, new Point(0,0), […]

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Mastering Development

Multiple Errors During HDF5 to CSV conversion

I have a huge h5 file wich I need to extract each data-set into a separate csv file. The schema is something like /Genotypes/GroupN/SubGroupN/calls with ‘N’ groups and ‘N’ sub-groups. I have created sample h5 file with same structure as main file and tested the codes which worked correctly but when i apply the code […]

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User Help

ZFS zpool cannot be imported, cause panic if not imported as readonly

After a reboot, ZFS pool never stopped trying to import the pool. It was blocking the boot-sequence and I had to rename the /etc/zfs/zpool.cache to another name, in order to boot the system. There was an upgrade made before reboot, but that was not anything with zfs. The problem is that zpool datastore is not […]