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Update leenkx/Sources/iron/object/ParticleSystem.hx

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LeenkxTeam
2025-09-24 01:50:03 +00:00
parent 6af1ef2df1
commit a72edc6203
1 changed files with 164 additions and 13 deletions
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leenkx/Sources/iron/object/ParticleSystem.hx
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@ -8,6 +8,8 @@ import kha.arrays.Float32Array;
import iron.data.Data; import iron.data.Data;
import iron.data.ParticleData; import iron.data.ParticleData;
import iron.data.SceneFormat; import iron.data.SceneFormat;
import iron.data.Geometry;
import iron.data.MeshData;
import iron.system.Time; import iron.system.Time;
import iron.math.Mat4; import iron.math.Mat4;
import iron.math.Quat; import iron.math.Quat;
@ -17,6 +19,7 @@ import iron.math.Vec4;
class ParticleSystem { class ParticleSystem {
public var data: ParticleData; public var data: ParticleData;
public var speed = 1.0; public var speed = 1.0;
public var dynamicEmitter: Bool = true;
var currentSpeed = 0.0; var currentSpeed = 0.0;
var particles: Array<Particle>; var particles: Array<Particle>;
var ready: Bool; var ready: Bool;
@ -52,6 +55,12 @@ class ParticleSystem {
var random = 0.0; var random = 0.0;
var tmpV4 = new Vec4();
var instancedData: Float32Array = null;
var lastSpawnedCount: Int = 0;
var hasUniqueGeom: Bool = false;
public function new(sceneName: String, pref: TParticleReference) { public function new(sceneName: String, pref: TParticleReference) {
seed = pref.seed; seed = pref.seed;
currentSpeed = speed; currentSpeed = speed;
@ -62,6 +71,11 @@ class ParticleSystem {
Data.getParticle(sceneName, pref.particle, function(b: ParticleData) { Data.getParticle(sceneName, pref.particle, function(b: ParticleData) {
data = b; data = b;
r = data.raw; r = data.raw;
if (r.dynamic_emitter != null){
dynamicEmitter = r.dynamic_emitter;
} else {
dynamicEmitter = true;
}
if (Scene.active.raw.gravity != null) { if (Scene.active.raw.gravity != null) {
gx = Scene.active.raw.gravity[0] * r.weight_gravity; gx = Scene.active.raw.gravity[0] * r.weight_gravity;
gy = Scene.active.raw.gravity[1] * r.weight_gravity; gy = Scene.active.raw.gravity[1] * r.weight_gravity;
@ -98,6 +112,8 @@ class ParticleSystem {
lap = 0; lap = 0;
lapTime = 0; lapTime = 0;
speed = currentSpeed; speed = currentSpeed;
lastSpawnedCount = 0;
instancedData = null;
} }
public function pause() { public function pause() {
@ -130,8 +146,13 @@ class ParticleSystem {
// Copy owner world transform but discard scale // Copy owner world transform but discard scale
owner.transform.world.decompose(ownerLoc, ownerRot, ownerScl); owner.transform.world.decompose(ownerLoc, ownerRot, ownerScl);
object.transform.loc = ownerLoc; if (dynamicEmitter) {
object.transform.rot = ownerRot; object.transform.loc.x = 0; object.transform.loc.y = 0; object.transform.loc.z = 0;
object.transform.rot = new Quat();
} else {
object.transform.loc = ownerLoc;
object.transform.rot = ownerRot;
}
// Set particle size per particle system // Set particle size per particle system
object.transform.scale = new Vec4(r.particle_size, r.particle_size, r.particle_size, 1); object.transform.scale = new Vec4(r.particle_size, r.particle_size, r.particle_size, 1);
@ -158,13 +179,18 @@ class ParticleSystem {
if (lap > prevLap && !r.loop) { if (lap > prevLap && !r.loop) {
end(); end();
} }
if (lap > prevLap && r.loop) {
lastSpawnedCount = 0;
}
updateGpu(object, owner); updateGpu(object, owner);
} }
public function getData(): Mat4 { public function getData(): Mat4 {
var hair = r.type == 1; var hair = r.type == 1;
m._00 = animtime; // Store loop flag in the sign: positive -> loop, negative -> no loop
m._00 = r.loop ? animtime : -animtime;
m._01 = hair ? 1 / particles.length : spawnRate; m._01 = hair ? 1 / particles.length : spawnRate;
m._02 = hair ? 1 : lifetime; m._02 = hair ? 1 : lifetime;
m._03 = particles.length; m._03 = particles.length;
@ -187,17 +213,26 @@ class ParticleSystem {
return r.size_random; return r.size_random;
} }
public function getRandom(): FastFloat { public inline function getRandom(): FastFloat {
return random; return random;
} }
public function getSize(): FastFloat { public inline function getSize(): FastFloat {
return r.particle_size; return r.particle_size;
} }
function updateGpu(object: MeshObject, owner: MeshObject) { function updateGpu(object: MeshObject, owner: MeshObject) {
if (!object.data.geom.instanced) setupGeomGpu(object, owner); if (dynamicEmitter) {
// GPU particles transform is attached to owner object if (!hasUniqueGeom) ensureUniqueGeom(object);
var needSetup = instancedData == null || object.data.geom.instancedVB == null;
if (needSetup) setupGeomGpuDynamic(object, owner);
updateSpawnedInstances(object, owner);
}
else {
if (!hasUniqueGeom) ensureUniqueGeom(object);
if (!object.data.geom.instanced) setupGeomGpu(object, owner);
}
// GPU particles transform is attached to owner object in static mode
} }
function setupGeomGpu(object: MeshObject, owner: MeshObject) { function setupGeomGpu(object: MeshObject, owner: MeshObject) {
@ -258,18 +293,134 @@ class ParticleSystem {
object.data.geom.setupInstanced(instancedData, 1, Usage.StaticUsage); object.data.geom.setupInstanced(instancedData, 1, Usage.StaticUsage);
} }
function fhash(n: Int): Float { // allocate instanced VB once for this object
var s = n + 1.0; function setupGeomGpuDynamic(object: MeshObject, owner: MeshObject) {
s *= 9301.0 % s; if (instancedData == null) instancedData = new Float32Array(particles.length * 3);
s = (s * 9301.0 + 49297.0) % 233280.0; lastSpawnedCount = 0;
return s / 233280.0; // Create instanced VB once if missing (seed with our instancedData)
if (object.data.geom.instancedVB == null) {
object.data.geom.setupInstanced(instancedData, 1, Usage.DynamicUsage);
}
} }
function ensureUniqueGeom(object: MeshObject) {
if (hasUniqueGeom) return;
var newData: MeshData = null;
new MeshData(object.data.raw, function(dat: MeshData) {
dat.scalePos = object.data.scalePos;
dat.scaleTex = object.data.scaleTex;
dat.format = object.data.format;
newData = dat;
});
if (newData != null) object.setData(newData);
hasUniqueGeom = true;
}
function updateSpawnedInstances(object: MeshObject, owner: MeshObject) {
if (instancedData == null) return;
var targetCount = count;
if (targetCount > particles.length) targetCount = particles.length;
if (targetCount <= lastSpawnedCount) return;
var normFactor = 1 / 32767;
var scalePosOwner = owner.data.scalePos;
var scalePosParticle = object.data.scalePos;
var particleSize = r.particle_size;
var base = 1.0 / (particleSize * scalePosParticle);
switch (r.emit_from) {
case 0: // Vert
var pa = owner.data.geom.positions;
var osx = owner.transform.scale.x;
var osy = owner.transform.scale.y;
var osz = owner.transform.scale.z;
var pCount = Std.int(pa.values.length / pa.size);
for (idx in lastSpawnedCount...targetCount) {
var j = Std.int(fhash(idx) * pCount);
var lx = pa.values[j * pa.size ] * normFactor * scalePosOwner * osx;
var ly = pa.values[j * pa.size + 1] * normFactor * scalePosOwner * osy;
var lz = pa.values[j * pa.size + 2] * normFactor * scalePosOwner * osz;
tmpV4.x = lx; tmpV4.y = ly; tmpV4.z = lz; tmpV4.w = 1;
tmpV4.applyQuat(ownerRot);
var o = idx * 3;
instancedData.set(o , (tmpV4.x + ownerLoc.x) * base);
instancedData.set(o + 1, (tmpV4.y + ownerLoc.y) * base);
instancedData.set(o + 2, (tmpV4.z + ownerLoc.z) * base);
}
case 1: // Face
var positions = owner.data.geom.positions.values;
var osx1 = owner.transform.scale.x;
var osy1 = owner.transform.scale.y;
var osz1 = owner.transform.scale.z;
for (idx in lastSpawnedCount...targetCount) {
var ia = owner.data.geom.indices[Std.random(owner.data.geom.indices.length)];
var faceIndex = Std.random(Std.int(ia.length / 3));
var i0 = ia[faceIndex * 3 + 0];
var i1 = ia[faceIndex * 3 + 1];
var i2 = ia[faceIndex * 3 + 2];
var v0x = positions[i0 * 4 ], v0y = positions[i0 * 4 + 1], v0z = positions[i0 * 4 + 2];
var v1x = positions[i1 * 4 ], v1y = positions[i1 * 4 + 1], v1z = positions[i1 * 4 + 2];
var v2x = positions[i2 * 4 ], v2y = positions[i2 * 4 + 1], v2z = positions[i2 * 4 + 2];
var rx = Math.random(); var ry = Math.random(); if (rx + ry > 1) { rx = 1 - rx; ry = 1 - ry; }
var pxs = v0x + rx * (v1x - v0x) + ry * (v2x - v0x);
var pys = v0y + rx * (v1y - v0y) + ry * (v2y - v0y);
var pzs = v0z + rx * (v1z - v0z) + ry * (v2z - v0z);
var px = pxs * normFactor * scalePosOwner * osx1;
var py = pys * normFactor * scalePosOwner * osy1;
var pz = pzs * normFactor * scalePosOwner * osz1;
tmpV4.x = px; tmpV4.y = py; tmpV4.z = pz; tmpV4.w = 1;
tmpV4.applyQuat(ownerRot);
var o1 = idx * 3;
instancedData.set(o1 , (tmpV4.x + ownerLoc.x) * base);
instancedData.set(o1 + 1, (tmpV4.y + ownerLoc.y) * base);
instancedData.set(o1 + 2, (tmpV4.z + ownerLoc.z) * base);
}
case 2: // Volume
var dim = object.transform.dim;
for (idx in lastSpawnedCount...targetCount) {
tmpV4.x = (Math.random() * 2.0 - 1.0) * (dim.x * 0.5);
tmpV4.y = (Math.random() * 2.0 - 1.0) * (dim.y * 0.5);
tmpV4.z = (Math.random() * 2.0 - 1.0) * (dim.z * 0.5);
tmpV4.w = 1;
tmpV4.applyQuat(ownerRot);
var o2 = idx * 3;
instancedData.set(o2 , (tmpV4.x + ownerLoc.x) * base);
instancedData.set(o2 + 1, (tmpV4.y + ownerLoc.y) * base);
instancedData.set(o2 + 2, (tmpV4.z + ownerLoc.z) * base);
}
}
// Upload full active range [0..targetCount) to this object's instanced VB
var geom = object.data.geom;
if (geom.instancedVB == null) {
geom.setupInstanced(instancedData, 1, Usage.DynamicUsage);
}
var vb = geom.instancedVB.lock();
var totalFloats = targetCount * 3; // xyz per instance
var i = 0;
while (i < totalFloats) {
vb.setFloat32(i * 4, instancedData[i]);
i++;
}
geom.instancedVB.unlock();
geom.instanceCount = targetCount;
lastSpawnedCount = targetCount;
}
inline function fhash(n: Int): Float {
var s = n + 1.0;
s *= 9301.0 % s;
s = (s * 9301.0 + 49297.0) % 233280.0;
return s / 233280.0;
}
public function remove() {} public function remove() {}
/** /**
Generates a random point in the triangle with vertex positions abc. Generates a random point in the triangle with vertex positions abc.
Please note that the given position vectors are changed in-place by this Please note that the given position vectors are changed in-place by this
function and can be considered garbage afterwards, so make sure to clone function and can be considered garbage afterwards, so make sure to clone
them first if needed. them first if needed.