v/examples/pendulum-simulation/modules/sim/anim/app.v

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module anim
import gg
import gx
import sim
import sim.args as simargs
const bg_color = gx.white
struct Pixel {
x f32
y f32
color gx.Color
}
struct App {
pub:
args simargs.ParallelArgs
request_chan chan &sim.SimRequest
result_chan chan &sim.SimResult
pub mut:
gg &gg.Context = 0
iidx int
pixels []u32
}
pub fn new_app(args simargs.ParallelArgs) &App {
total_pixels := args.grid.height * args.grid.width
mut app := &App{
args: args
pixels: []u32{len: total_pixels}
request_chan: chan &sim.SimRequest{cap: args.grid.width}
}
app.gg = gg.new_context(
width: args.grid.width
height: args.grid.height
create_window: true
window_title: 'V Pendulum Simulation'
user_data: app
bg_color: anim.bg_color
frame_fn: frame
init_fn: init
)
return app
}
fn init(mut app App) {
app.iidx = app.gg.new_streaming_image(app.args.grid.width, app.args.grid.height, 4,
pixel_format: .rgba8)
go pixels_worker(mut app)
}
fn frame(mut app App) {
app.gg.begin()
app.draw()
app.gg.end()
}
fn (mut app App) draw() {
mut istream_image := app.gg.get_cached_image_by_idx(app.iidx)
istream_image.update_pixel_data(&app.pixels[0])
app.gg.draw_image(0, 0, app.args.grid.width, app.args.grid.height, istream_image)
}