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builtin: support a.flags.set(.noslices | .noshrink), use it in the particles example (#13818)

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This commit is contained in:
Delyan Angelov
2022-03-24 23:37:13 +02:00
committed by GitHub
parent a4ab3c1f14
commit 5b492e26dd
3 changed files with 86 additions and 3 deletions
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18
examples/sokol/particles/modules/particle/system.v
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@ -19,8 +19,8 @@ mut:
}
pub fn (mut s System) init(sc SystemConfig) {
unsafe { s.pool.flags.set(.noslices) }
unsafe { s.bin.flags.set(.noslices) }
unsafe { s.pool.flags.set(.noslices | .noshrink) }
unsafe { s.bin.flags.set(.noslices | .noshrink) }
for i := 0; i < sc.pool; i++ {
p := new(vec2.Vec2{f32(s.width) * 0.5, f32(s.height) * 0.5})
s.bin << p
@ -29,12 +29,19 @@ pub fn (mut s System) init(sc SystemConfig) {
pub fn (mut s System) update(dt f64) {
mut p := &Particle(0)
mut moved := 0
for i := 0; i < s.pool.len; i++ {
p = s.pool[i]
p.update(dt)
if p.is_dead() {
s.bin << p
s.pool.delete(i)
moved++
}
}
$if trace_moves_spool_to_sbin ? {
if moved != 0 {
eprintln('${moved:4} particles s.pool -> s.bin')
}
}
}
@ -64,6 +71,7 @@ pub fn (mut s System) explode(x f32, y f32) {
mut reserve := 500
center := vec2.Vec2{x, y}
mut p := &Particle(0)
mut moved := 0
for i := 0; i < s.bin.len && reserve > 0; i++ {
p = s.bin[i]
p.reset()
@ -75,8 +83,14 @@ pub fn (mut s System) explode(x f32, y f32) {
p.life_time = rand.f64_in_range(500, 2000) or { 500 }
s.pool << p
s.bin.delete(i)
moved++
reserve--
}
$if trace_moves_sbin_to_spool ? {
if moved != 0 {
eprintln('${moved:4} particles s.bin -> s.pool')
}
}
}
pub fn (mut s System) free() {