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v/examples/pendulum-simulation/modules/sim/img/worker.v

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module img
import benchmark
import sim
pub fn image_worker(mut writer PPMWriter, result_chan chan &sim.SimResult, settings ImageSettings) {
width := settings.width
height := settings.height
total_pixels := width * height
// as new pixels come in, write them to the image file
mut current_index := u64(0)
mut pixel_buf := []ValidColor{len: total_pixels, init: ValidColor{
valid: false
}}
mut bmark := benchmark.new_benchmark()
for {
result := <-result_chan or { break }
// find the closest magnet
pixel_buf[result.id].Color = compute_pixel(result)
pixel_buf[result.id].valid = true
for current_index < total_pixels && pixel_buf[current_index].valid {
bmark.step()
writer.handle_pixel(pixel_buf[current_index].Color) or {
bmark.fail()
sim.log(@MOD + '.' + @FN + ': pixel handler failed. Error ${err}')
break
}
bmark.ok()
current_index++
}
}
bmark.stop()
println(bmark.total_message(@FN))
writer.write() or { panic('Could not write image') }
}