A library that lets you draw various simple 2d geometry primitives fast using a single shader program and a single vertex buffer object with a safe api (provided no other libray is calling opengl functions).
```rust use axgeom::*; let eventsloop = glutin::eventloop::EventLoop::new(); let mut glsys = verysimple2d::WindowedSystem::newp(600., 480., &events_loop,"test window");
let mut canvas = glsys.canvas_mut();
//Make the background dark gray. canvas.clear_color([0.2,0.2,0.2]);
//Push some squares to a static vertex buffer object on the gpu. let rect_save = canvas.squares(5.0) .addp(40., 40.) .addp(40., 40.) .save();
//Draw the squares we saved. rect_save.draw(&mut canvas,[0.0, 1.0, 0.1, 0.5]);
//Draw some arrows. canvas.arrows(5.0) .add(vec2(40., 40.), vec2(40., 200.)) .add(vec2(40., 40.), vec2(200., 40.)) .sendanddraw([0.0, 1.0, 0.1, 0.5]);
//Draw some circles. canvas.circles(4.0) .add(vec2(5.,6.)) .add(vec2(7.,8.)) .add(vec2(9.,5.)) .sendanddraw([0., 1., 1., 0.1]);
//Draw some circles from f32 primitives. canvas.circles(4.0) .addp(5.,6.) .addp(7.,8.) .addp(9.,5.) .sendanddraw([0., 1., 1., 0.1]);
//Swap buffers on the opengl context. glsys.swap_buffers(); ```