triangle | Draw geometrically accurate triangles in React Native | Graphics library

I'm trying to create a triangular grid with HTML and CSS which involves offsetting each successive triangle in the grid to the left by larger and larger amounts so that each triangle fits neatly next to the previous one. Since the amount that each triangle needs to move is based on it's index in the parent container, I'm currently using JS to set this offset. I'm looking for a way to do this with pure CSS. Using JS like this feels like a hack and I'm wondering if I'm missing something in CSS that would let me access each triangle div's index or perhaps there's another way altogether in CSS to achieve what I'm doing.

Sorry if my title is difficult to understand.

I've multiple fields named date1, date2... On Change of those fields, I want a full script to run. Today, I have simply copied the code for each dateN I have.

I would like to have a cleaner code and use the next JQuery selector:

I have an h1 element that I want to be invisible and then appear after a few seconds. The element has an ::after pseudo-element that displays a data-text attribute that shadows the h1 element. When I add the animation, I only see the h1 and not the pseudo-element as well. Here is my code

EDIT adding the animation to the pseudo-element makes it appear, but now the data-text appears over the h1 element when originally it is supposed to go behind it. Here are some pic of what is happening. The first is what it is doing and the second is what I want.

EDIT 2 The problem can be recreated by removing the z-index on the pseudo-element.

I am trying to display a texture, but for some reason it's not shown correctly it's distorted.

This is my source code:

I have a class named triangulo, and a class named coord. So, in a way to create a new instance of triangle, I pass three vertex like

t= triangle( V1, V2, V3)

So, for documentation, I want to write the class triangle in this way

I'm rendering this cube and it should show the front of the cube but instead it shows the back (green color). How do i solve this? I've been sitting for a couple of hours trying to fix this but nothing helped. I was trying various things like changing the order in which the triangles are rendered and it didn't help either. Thanks for any help. Here's my code.

Quick question - title says it all:

In my OpenGL-code (3.3), I'm using the line

I've built this new ggplot2 geom layer I'm calling geom_triangles (see https://github.com/ctesta01/ggtriangles/) that plots isosceles triangles given aesthetics including x, y, z where z is the height of the triangle and the base of the isosceles triangle has midpoint (x,y) on the graph.

What I want is for the geom_triangles() layer to automatically provide legend components for the height and width of the triangles, but I am not sure how to do that.

I understand based on this reference that I may need to adjust the draw_key argument in the ggproto StatTriangles object, but I'm not sure how I would do that and can't seem to find examples online of how to do it. I've been looking at the source code in ggplot2 for the draw_key functions, but I'm not sure how I would introduce multiple legend components (one for each of height and width) in a single draw_key argument in the StatTriangles ggproto.

I'm trying to pivot to a longer format using dplyr::pivot_longer, but can't seem to get it to do what I want. I can manage with reshape::melt, but I'd also like to be able to achieve the same using pivot_longer.

The data I'm trying to reformat is a correlation matrix of the mtcars-dataset: