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update examples

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This commit is contained in:
wooshings
2026-10-18 11:00:01 -07:00
parent 32ec90f67e
commit 94197df1bd
2 changed files with 22 additions and 20 deletions
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README.md
+6 -4
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@@ -30,7 +30,7 @@ app: ecs.App
you can run your app with `run()`. run takes a reference to your app to run it's systems. you can run your app with `run()`. run takes a reference to your app to run it's systems.
``` odin ```odin
main :: proc() { main :: proc() {
ecs.run(&app) ecs.run(&app)
} }
@@ -103,8 +103,10 @@ since components are saved in storage next to their entity, you can loop through
```odin ```odin
main :: proc() { main :: proc() {
for entity_id, component in ecs.slice(&Example) { components := ecs.slice(&Example)
//... entities := ecs.slice_entity(&Example)
for v, i in components {
e := entities[i] // get entity that owns the component
} }
} }
``` ```
@@ -113,7 +115,7 @@ or if you know your storage only has one entry use `single()`
```odin ```odin
main :: proc() { main :: proc() {
entity_id, component := ecs.single(&Example) component, entity_id := ecs.single(&Example)
} }
``` ```
### plugins ### plugins
examples/bouncing_balls.odin
+16 -16
View File
@@ -1,6 +1,5 @@
package main package main
import "core:fmt"
import "core:math/rand" import "core:math/rand"
import "core:strconv" import "core:strconv"
import "core:strings" import "core:strings"
@@ -9,7 +8,7 @@ import rl "vendor:raylib"
app: ecs.App app: ecs.App
ball_count: int = 1000 ball_count: int = 10000
BallComponent :: struct { BallComponent :: struct {
radius: f32, radius: f32,
speed: f32, speed: f32,
@@ -27,18 +26,14 @@ main :: proc() {
} }
setup_window :: proc() { setup_window :: proc() {
_, window := ecs.single(&ecs.Window) window, _ := ecs.single(&ecs.Window)
window.background = rl.BLACK window.background = rl.BLACK
} }
spawn_balls :: proc() { spawn_balls :: proc() {
for i in 0 ..< ball_count { for i in 0 ..< ball_count {
ball := ecs.spawn_entity(&app) ball := ecs.spawn_entity(&app)
ecs.add_component( ecs.add_component(ball, &Ball, BallComponent{radius = 5, speed = rand.float32_range(4, 6)})
ball,
&Ball,
BallComponent{radius = 10, speed = rand.float32_range(4, 6)},
)
ecs.add_component( ecs.add_component(
ball, ball,
&ecs.Transform, &ecs.Transform,
@@ -51,10 +46,12 @@ spawn_balls :: proc() {
} }
update_balls :: proc() { update_balls :: proc() {
_, window := ecs.single(&ecs.Window) window, _ := ecs.single(&ecs.Window)
for entity, ball in ecs.slice(&Ball) { balls := ecs.slice(&Ball)
transform := ecs.get_component(entity, &ecs.Transform) entities := ecs.slice_entity(&Ball)
for ball, i in balls {
transform := ecs.get_component(entities[i], &ecs.Transform)
pos := transform.translation pos := transform.translation
if pos.x <= 0 || pos.x >= f32(window.width) || pos.y <= 0 || pos.y >= f32(window.height) { if pos.x <= 0 || pos.x >= f32(window.width) || pos.y <= 0 || pos.y >= f32(window.height) {
@@ -63,13 +60,14 @@ update_balls :: proc() {
dir := rl.Vector2Rotate(rl.Vector2{0, ball.speed}, transform.rotation) dir := rl.Vector2Rotate(rl.Vector2{0, ball.speed}, transform.rotation)
transform.translation += dir transform.translation += dir
fmt.println(transform.rotation)
} }
} }
draw_balls :: proc() { draw_balls :: proc() {
for entity, ball in ecs.slice(&Ball) { balls := ecs.slice(&Ball)
transform := ecs.get_component(entity, &ecs.Transform) entities := ecs.slice_entity(&Ball)
for ball, i in balls {
transform := ecs.get_component(entities[i], &ecs.Transform)
rl.DrawCircle( rl.DrawCircle(
i32(transform.translation.x), i32(transform.translation.x),
i32(transform.translation.y), i32(transform.translation.y),
@@ -80,7 +78,9 @@ draw_balls :: proc() {
} }
show_framerate :: proc() { show_framerate :: proc() {
buf: [19]byte fps_buf: [19]byte
framerate := strconv.write_int(buf[:], i64(1 / rl.GetFrameTime()), 10) framerate := strconv.write_int(fps_buf[:], i64(1 / rl.GetFrameTime()), 10)
rl.DrawText(strings.clone_to_cstring(framerate), 0, 0, 24, rl.WHITE) rl.DrawText(strings.clone_to_cstring(framerate), 0, 0, 24, rl.WHITE)
rl.DrawText(" fps", 0, 0, 24, rl.WHITE)
rl.DrawText("10000 balls", 0, 24, 24, rl.WHITE)
} }