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@@ -0,0 +1,130 @@
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+package hrt.prefab.l3d;
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+
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+class SplineMeshSpawnerObject extends h3d.scene.Object {
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+ var spline : Spline;
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+ var batches : Array<h3d.scene.MeshBatch> = [];
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+
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+ override public function new(spline : Spline, parent : h3d.scene.Object) {
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+ super(parent);
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+ this.spline = spline;
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+ }
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+
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+ public function init() {
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+ for ( b in batches )
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+ b.remove();
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+ batches = [];
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+
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+ var points = spline.points;
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+ if ( points == null || points.length < 2 )
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+ return;
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+
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+ var meshes = findAll(o -> Std.downcast(o, h3d.scene.Mesh));
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+ for ( mesh in meshes ) {
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+ var prim = Std.downcast(mesh.primitive, h3d.prim.MeshPrimitive);
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+ mesh.culled = prim != null;
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+ if ( prim == null )
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+ continue;
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+ var meshRelPos = new h3d.Matrix();
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+ meshRelPos.multiply3x4inline(mesh.getAbsPos(), this.getAbsPos().getInverse());
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+ var multi = Std.downcast(mesh, h3d.scene.MultiMaterial);
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+ var batch = new h3d.scene.MeshBatch(prim, null, this);
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+ batches.push(batch);
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+ batch.materials = multi != null ? [for ( m in multi.materials ) m] : [mesh.material];
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+ batch.worldPosition = new h3d.Matrix();
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+ batch.begin();
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+
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+ var primBounds = prim.getBounds();
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+ var primMin = primBounds.getMin();
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+ var primMax = primBounds.getMax();
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+ var primSize = primBounds.getSize();
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+
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+ for ( i in 0...points.length-1 ) {
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+ var from = points[i];
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+ var to = points[i+1];
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+
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+ var dist = to.pos.sub(from.pos).length();
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+ var count = hxd.Math.imax(Math.floor(dist / primSize.x), 1);
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+ var distPerCount = dist / count;
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+
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+ for ( j in 0...count ) {
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+ var dir = to.pos.sub(from.pos).normalized();
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+ var q = new h3d.Quat();
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+ q.initDirection(dir, from.up);
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+ var matRot = q.toMatrix();
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+
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+ batch.worldPosition.identity();
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+ batch.worldPosition.load(meshRelPos);
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+ var scale = distPerCount / primSize.x;
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+ batch.worldPosition.translate(-primMin.x, 0.0, 0.0);
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+ batch.worldPosition.scale(scale);
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+ batch.worldPosition.multiply3x4inline(batch.worldPosition, matRot);
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+ var start = new h3d.Vector();
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+ start.lerp(from.pos, to.pos, j/count);
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+ batch.worldPosition.translate(start.x, start.y, start.z);
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+ batch.emitInstance();
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+ }
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+ }
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+ }
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+
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+ }
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+}
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+
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+class SplineMeshSpawner extends hrt.prefab.Object3D {
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+
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+ var spline(get, default) : Spline = null;
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+ function get_spline() {
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+ if ( spline == null )
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+ spline = findParent(Spline, null, false, true);
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+ return spline;
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+ }
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+
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+ override function makeObject(parent3d: h3d.scene.Object) : h3d.scene.Object {
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+ return new SplineMeshSpawnerObject(spline, parent3d);
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+ }
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+
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+ override function updateInstance(?propName : String ) {
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+ super.updateInstance(propName);
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+
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+ if ( spline != null && spline.samples != null )
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+ init();
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+ }
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+
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+ override function postMakeInstance() {
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+ super.postMakeInstance();
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+ init();
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+ }
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+
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+ function init() {
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+ if ( local3d != null )
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+ cast(local3d, SplineMeshSpawnerObject).init();
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+ }
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+
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+ #if editor
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+ override function edit( ctx : hide.prefab.EditContext ) {
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+ super.edit(ctx);
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+
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+ var props = new hide.Element('
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+ <div class="group" name="Preview">
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+ <dl>
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+ <dt>Points</dt><dd><input type="range" min="4" max="64" step="1" field="previewPointCount"/></dd>
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+ <dt>Radius</dt><dd><input type="range" min="1" max="10" field="previewRadius"/></dd>
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+ </dl>
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+ </div>
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+ ');
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+
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+ props.find(".refresh").click(function(_) { ctx.onChange(this, null); });
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+ ctx.properties.add(props, this, function(pname) { ctx.onChange(this, pname); });
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+ }
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+
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+ override function getHideProps() : hide.prefab.HideProps {
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+ return {
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+ icon : "arrows-v",
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+ name : "SplineMeshSpawner",
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+ allowParent : (p) -> Std.isOfType(p, Spline) || p.parent == null,
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+ onChildUpdate : (p) -> init(),
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+ };
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+ }
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+ #end
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+
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+ static var _ = hrt.prefab.Prefab.register("splineMeshSpawner", SplineMeshSpawner);
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+}
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clementlandrin