https://github.com/pygae/cppganja
C++ geometric algebra visualisation via ganja.js
https://github.com/pygae/cppganja
Last synced: 12 months ago
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C++ geometric algebra visualisation via ganja.js
- Host: GitHub
- URL: https://github.com/pygae/cppganja
- Owner: pygae
- Created: 2019-07-23T09:53:05.000Z (almost 7 years ago)
- Default Branch: master
- Last Pushed: 2020-01-16T15:07:48.000Z (over 6 years ago)
- Last Synced: 2024-11-20T14:47:52.040Z (over 1 year ago)
- Language: JavaScript
- Homepage:
- Size: 122 KB
- Stars: 10
- Watchers: 2
- Forks: 1
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
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README
# cppganja - C++ interface to ganja.js
A very simple/limited interface to [ganja.js](https://github.com/enkimute/ganja.js) written for c++
# Interface example
```
// A couple of example CGA objects
std::vector test_obj{0.,0.,0.,0.,0.,0.,0.,0.,0.,0.,0.,0.,0.,0.,0.,0.,0.,4.23135483,4.23135483,0.48031496,0.48031496,0.95680003,1.2228812,1.2228812,-0.06350011,-0.28372776,0.,0.,0.,0.,0.,0.};
std::vector test_obj2{0.,0.,0.,0.,0.,0.,0.,0.,0.,0.,0.,0.,0.,0.,0.,0.,-0.08525168,3.49464756,3.52703718,-1.59496133,-1.62835966,0.76309611,0.64874369,0.65012918,0.18968262,-0.22823195,0.,0.,0.,0.,0.,0.};
// Make the scene and add the objects
GanjaScene gs = GanjaScene();
gs.add_object(test_obj);
gs.add_object(test_obj2, Color::RED);
// State what signature our algebra is from
std::vector sig{1.0,1.0,1.0,1.0,-1.0};
std::string html = generate_full_html(gs.as_string(), sig, 0.1);
// Write the output to an html file
std::ofstream myfile;
myfile.open ("example.html");
myfile << html;
myfile.close();
```
# Ganja.js generated C++ Example
```
#include
#include
#include "cga.h"
#include "../../GanjaScene.h"
// Convenience function to get a double in the range a -> b
double rand_float_range(double a, double b){
return ((b - a) * ((double)rand() / RAND_MAX)) + a;
}
// Convenience function to get a random point near the origin
CGA random_point(double scale=1){
return up(rand_float_range(-scale, scale),
rand_float_range(-scale, scale),
rand_float_range(-scale, scale));
}
// Convenience function to get a random line near the origin
CGA random_line(double scale=1){
return (random_point(scale)^random_point(scale)^ni).normalized();
}
// Convenience function to get a random circle near the origin
CGA random_circle(double scale=1){
return (random_point(scale)^random_point(scale)^random_point(scale)).normalized();
}
// Convenience function to get a random plane near the origin
CGA random_plane(double scale=1){
return (random_point(scale)^random_point(scale)^random_point(scale)^ni).normalized();
}
int main (int argc, char **argv) {
// We will seed the RNG to get different results
unsigned int seed = time(NULL);
srand (seed);
// Print the seed in case we like the look
// of the scene and want to recreate
std::cout << "Seed: " << seed << std::endl;
// Ok lets make some objects
CGA point = random_point();
CGA line = random_line();
CGA circle = random_circle();
CGA plane = random_plane();
// Make the GanjaScene and add the objects to it
GanjaScene gs = GanjaScene();
gs.add_object(point, Color::BLACK); // You can specify color explicitly
gs.add_object(line, Color::RED);
gs.add_object(circle, Color::BLUE);
gs.add_object(plane); // Or allow it to default to a semi-see-through grey
// State what signature our algebra is from
std::vector sig{1.0,1.0,1.0,1.0,-1.0};
std::string html = generate_full_html(gs.as_string(), sig);
// Write the output to an html file
std::ofstream myfile;
myfile.open ("example.html");
myfile << html;
myfile.close();
return 0;
}
```
