Feb 20, 2013 · I've written a very simple pass-through geometry shader. My input primitive is points and output primitive is also points. I also want to forward the color and normal from vertex shader to fragment shader through geometry shader. The shaders are compiled and linked flawlessly but the final color is very weird.

Feb 17, 2019 · df1[1,1] = df1[1,1] + c(2,0) ggplot(df1) + geom_sf(aes(geometry = geometry)) Explanatory note: df1[1,1] selects the first column and row, which is the star. Adding c(2,0) translates it by +2 in the x direction. The answer to the question you actually asked: If you really need the x,y cordinates as columns in a data.frame, you can use

I'm trying to write a simple geometry shader what just passes through vertices before attempting to modify stuff. My vertex shader is. #version 150 core in vec3 inPosition; in vec4 inColor; out vec4 vertexColor; void main() { vertexColor = inColor; gl_Position = vec4(inPosition, 1.0); } My geometry shader is

At the end of the pipe, I want a simple features data frame that I can plot and manipulate like any other. Another rub with what I'm trying to do is that I've got a data frame with a column for EPSG. I need to create this simple features data frame for each place and combine that all together into a larger simple features data frame.

Jul 21, 2019 · I am trying to add a geometry shader stage to my pipeline, however when i add the geometry shader function, even the vertex shader compilation gives errors for some reason (the Vertex, Pixel and Geometry shaders are in the same file). the code inside the geometry shader seems to be causing the problem, because as soon as i deleted it, the ...

Apr 2, 2023 · I am interested in learning about how to work with "Road Network" files - for example, I would like to find out the driving distance between two sets of geographical coordinates (i.e. lon...

If you have only these regular shapes, there is a simple procedure as follows : Find Contours in the image (image should be binary as given in your question) Approximate each contour using approxPolyDP function. Check number of elements in the approximated contours of all shapes to recognize shape. For eg, square will have 4, pentagon will have 5.

How to determine whether points of simple polygon are given in clockwise or counterclockwise orientation? My idea was to use PositivelyOrientedPoints on successive three points. If there is more True-s the order is counterclockwise if there is more False-s the order is clockwise.

Mar 3, 2019 · library(magrittr) #for the pipe df <- df %>% dplyr::mutate(lon = sf::st_coordinates(.)[,1], lat = sf::st_coordinates(.)[,2]) df Simple feature collection with 3 features and 3 fields geometry type: POINT dimension: XY bbox: xmin: 116.4 ymin: 26 xmax: 117.9 ymax: 40.1 CRS: EPSG:4326 # A tibble: 3 x 4 ID geometry lon lat * <dbl> <POINT [°]> <dbl ...

Oct 26, 2022 · Accessing Simple Feature geometry column for density calculation. Related questions. 12 ...