thejefflarson

#include <iostream>

#include <boost/shared_ptr.hpp>
#include <gdal/ogrsf_frmts.h>
#include <geos_c.h>
#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
#include <CGAL/Polygon_with_holes_2.h>
#include <CGAL/create_straight_skeleton_from_polygon_with_holes_2.h>

typedef CGAL::Exact_predicates_inexact_constructions_kernel K ;

jeroen

Getting shit to work

Disclaimers

• No authority
• Official reference is writing r extentions (joke extentions)
• If you thought writing regular r packages was tricky, hold on

timelyportfolio

This is certainly not the intended purpose of mapedit, but I thought it would be fun to use some accumulated R knowledge to use mapedit and leaflet to edit an igraph layout. To run the code, make sure to run the edit_map and Shiny parts separately.

library(igraph)
library(leaflet)
library(mapedit)

karate <- graph.famous("Zachary")
igrf_layout <- layout.auto(karate)

timelyportfolio

d3r aims to make d3.js easy in R. Here is an example of combining d3.quadtree with base graphics in R using the new d3_v8() function.

Code

# d3.quadtree example

library(d3r)

jamesgrecian

############################################
### Extract NSIDC geotiff data to points ###
############################################

#Many thanks to mdsumner for help with this:
#https://github.com/mdsumner/extractNSIDC/blob/master/extract_script.R

#Load libraries
require(tidyverse)
require(lubridate)

brodieG

mk_name <- function(name=NULL) {
  v <- as.character(packageVersion('rayrender'))
  dir <- file.path('~', 'Downloads', 'rr-tests')
  if(is.null(name)) {
    name <- sprintf( 'a_%s.png', format(Sys.time(), "%Y-%m-%d_%H%M%S"))
  } else {
    name <- sprintf('%s.png', name)
  }
  file.path(dir, v, name)
}

djnavarro

#include <Rcpp.h>
using namespace Rcpp;

// turmite function to be called from R
// [[Rcpp::export]]
NumericMatrix flame(int iter, int layers) {
  
  NumericMatrix points(iter, 3); // initially zero
  NumericMatrix coeffs(9, layers);
  

coolbutuseless

library(rgl)


pan3d <- function(button, dev = rgl.cur(), subscene = currentSubscene3d(dev)) {
  start <- list()

  begin <- function(x, y) {
    activeSubscene <- par3d("activeSubscene", dev = dev)
    start$listeners <<- par3d("listeners", dev = dev, subscene = activeSubscene)
    for (sub in start$listeners) {

hypercompetent

library(rgl)

sl  <- shapelist3d(cube3d(alpha = 1, 
                          color = 'grey90', 
                          specular = 'black', 
                          lit = TRUE), 
                   plot = FALSE)

create_next_level <- function(sl, level) {
  

coolbutuseless

MIT Licensed. Copyright (c) 2021 mikefc@coolbutuseless.com   
Share and Enjoy.

## Introduction

This code was a personal challenge to write a simple ray-tracer in pure R.

Ray tracing is an example of something which is really silly to do in base R, 
and I'd be interested to see how others would approach this problem.