From eaf1d2bcb74a8175d4f385339eda94c17da78b39 Mon Sep 17 00:00:00 2001
From: peterino2 <peterlimail47@gmail.com>
Date: Sun, 21 Sep 2025 01:09:49 -0700
Subject: [PATCH] added features for local editing of some stuff

---
 engine/rend/src/particles/particles.zig       | 50 ++++++++++++-------
 projects/sampleGame/externGame/externGame.zig |  8 +++
 projects/sampleGame/main.zig                  |  1 -
 3 files changed, 41 insertions(+), 18 deletions(-)

diff --git a/engine/rend/src/particles/particles.zig b/engine/rend/src/particles/particles.zig
index c66e43f..36e0f4a 100644
--- a/engine/rend/src/particles/particles.zig
+++ b/engine/rend/src/particles/particles.zig
@@ -141,6 +141,8 @@ pub const ParticleEmitter = struct {
     emitterMaxLife: f64 = 0.0,
     emitterShape: EmitterShape = .{ .spherical = .{} },
 
+    useLocalScene: bool = false,
+
     _showDebug: bool = false,
 
     entity: core.Entity = undefined,
@@ -180,18 +182,20 @@ pub const ParticleEmitter = struct {
             }
         }
 
-        switch (self.emitterShape) {
-            .spherical => |spherical| {
-                i = 0;
-                while (i < self.particlesPVA.items.len) : (i += 1) {
-                    if (positionLength(self.particlesPVA.items[i].position) > spherical.radius) {
-                        self.removeParticle(i);
+        if (self.useLocalScene) {
+            switch (self.emitterShape) {
+                .spherical => |spherical| {
+                    i = 0;
+                    while (i < self.particlesPVA.items.len) : (i += 1) {
+                        if (positionLength(self.particlesPVA.items[i].position) > spherical.radius) {
+                            self.removeParticle(i);
+                        }
                     }
-                }
-            },
-            .conal => {
-                @panic("not implemented");
-            },
+                },
+                .conal => {
+                    @panic("not implemented");
+                },
+            }
         }
     }
 
@@ -237,7 +241,7 @@ pub const ParticleEmitter = struct {
                 const v = core.Vectorf{ .x = oneRand.getRange(), .y = oneRand.getRange(), .z = oneRand.getRange() };
                 const v2 = v.normalize();
 
-                const pva: ParticlePVA = .{
+                var pva: ParticlePVA = .{
                     .velocity = v2.fmul(self.particleVelocity.getRange()).toZm(),
                     .position = .{
                         radius.getRange(),
@@ -247,6 +251,11 @@ pub const ParticleEmitter = struct {
                     },
                     .acceleration = v2.fmul(self.particleAcceleration.getRange()).toZm(),
                 };
+
+                if (!self.useLocalScene) {
+                    const scenePos = core.zm.mul(pva.position, self.entity.fetch(core.Scene).?.getPosRot().toTransform());
+                    pva.position = scenePos;
+                }
                 return pva;
             },
             .conal => |conal| {
@@ -291,13 +300,20 @@ pub const ParticleEmitter = struct {
     }
 
     pub fn updateFinals(self: *@This()) void {
-        const scene = self.entity.fetch(core.Scene).?;
-        const transform = scene.getPosRot().toTransform();
+        if (self.useLocalScene) {
+            const scene = self.entity.fetch(core.Scene).?;
+            const transform = scene.getPosRot().toTransform();
 
-        for (self.particlesPVA.items, 0..) |pva, i| {
-            const p = core.zm.translationV(pva.position);
+            for (self.particlesPVA.items, 0..) |pva, i| {
+                const p = core.zm.translationV(pva.position);
 
-            self.finals.items[i] = core.zm.mul(p, transform);
+                self.finals.items[i] = core.zm.mul(p, transform);
+            }
+        } else {
+            for (self.particlesPVA.items, 0..) |pva, i| {
+                const p = core.zm.translationV(pva.position);
+                self.finals.items[i] = p;
+            }
         }
     }
 
diff --git a/projects/sampleGame/externGame/externGame.zig b/projects/sampleGame/externGame/externGame.zig
index 0d8e72c..3e51c77 100644
--- a/projects/sampleGame/externGame/externGame.zig
+++ b/projects/sampleGame/externGame/externGame.zig
@@ -217,6 +217,14 @@ pub const ExternGameObject = struct {
             .mass_properties_override = .{ .mass = 12 },
             .override_mass_properties = .calc_inertia,
         });
+
+        const particle = box2.addComponent(rend.ParticleEmitter).?;
+        particle.start();
+        particle.gravity = .{ .y = 1.0 };
+        particle.particleVelocity = .{ .min = 0.6, .max = 1.2 };
+        particle.particleLife = .{ .min = 5, .max = 6 };
+        var name = core.MakeName("t_pixelSmoke");
+        particle.texture = rend.getTexture(&name).?;
     }
 
     fn onAltFire(ctx: ?*anyopaque, _: core.ActionEvent) void {
diff --git a/projects/sampleGame/main.zig b/projects/sampleGame/main.zig
index ec1edf7..f929aea 100644
--- a/projects/sampleGame/main.zig
+++ b/projects/sampleGame/main.zig
@@ -128,7 +128,6 @@ pub const ParticleObject = struct {
         const e = try core.createEntity();
 
         const particle = e.addComponent(rend.ParticleEmitter).?;
-        particle._showDebug = true;
         particle.start();
         particle.gravity = .{ .y = -9.8 };
         var name = core.MakeName("t_pixelSmoke");