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v/examples/pendulum-simulation/modules/sim/runner.v

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module sim
import benchmark
import term
pub type SimRequestHandler = fn (request &SimRequest) !
pub type SimStartHandler = fn () !
pub type SimFinishHandler = fn () !
pub const (
default_width = 600
default_height = 600
)
[params]
pub struct GridSettings {
pub:
width int = sim.default_width
height int = sim.default_height
}
pub fn new_grid_settings(settings GridSettings) GridSettings {
return GridSettings{
...settings
}
}
[params]
pub struct RunnerSettings {
pub:
grid GridSettings
on_request SimRequestHandler
on_start SimStartHandler
on_finish SimFinishHandler
}
pub fn run(params SimParams, settings RunnerSettings) {
height := settings.grid.height
width := settings.grid.width
if !isnil(settings.on_start) {
settings.on_start() or {
log(@MOD + '.' + @FN + ': Simulation start handler failed. Error $err')
}
}
mut index := 0
log('')
mut bmark := benchmark.new_benchmark()
for y in 0 .. height {
$if verbose ? {
term.clear_previous_line()
}
log(@MOD + '.' + @FN + ': y: ${y + 1}')
for x in 0 .. width {
bmark.step()
// setup state conditions
position := vector(
x: 0.1 * ((f64(x) - 0.5 * f64(width - 1)) / f64(width - 1))
y: 0.1 * ((f64(y) - 0.5 * f64(height - 1)) / f64(height - 1))
z: 0.0
)
velocity := vector(x: 0, y: 0, z: 0)
mut state := new_state(
position: position
velocity: velocity
)
state.satisfy_rope_constraint(params)
request := &SimRequest{
id: index
state: state
params: params
}
settings.on_request(request) or {
log(@MOD + '.' + @FN + ': request handler failed. Error $err')
bmark.fail()
break
}
index++
bmark.ok()
}
}
bmark.stop()
println(bmark.total_message(@FN))
if !isnil(settings.on_finish) {
settings.on_finish() or {
log(@MOD + '.' + @FN + ': Simulation stop handler failed. Error $err')
}
}
}