hook up a way to get mesh out of polyvox

libraries/entities-renderer/src/RenderablePolyVoxEntityItem.cpp

@@ -14,6 +14,7 @@
 #include <QByteArray>
 #include <QtConcurrent/QtConcurrentRun>
 #include <glm/gtx/transform.hpp>
+#include "ModelScriptingInterface.h"
 
 #if defined(__GNUC__) && !defined(__clang__)
 #pragma GCC diagnostic push
@@ -73,7 +74,7 @@ const float MARCHING_CUBE_COLLISION_HULL_OFFSET = 0.5;
   _meshDirty
 
   In RenderablePolyVoxEntityItem::render, these flags are checked and changes are propagated along the chain.
-  decompressVolumeData() is called to decompress _voxelData into _volData.  getMesh() is called to invoke the
+  decompressVolumeData() is called to decompress _voxelData into _volData.  recomputeMesh() is called to invoke the
   polyVox surface extractor to create _mesh (as well as set Simulation _dirtyFlags).  Because Simulation::DIRTY_SHAPE
   is set, isReadyToComputeShape() gets called and _shape is created either from _volData or _shape, depending on
   the surface style.
@@ -81,7 +82,7 @@ const float MARCHING_CUBE_COLLISION_HULL_OFFSET = 0.5;
   When a script changes _volData, compressVolumeDataAndSendEditPacket is called to update _voxelData and to
   send a packet to the entity-server.
 
-  decompressVolumeData, getMesh, computeShapeInfoWorker, and compressVolumeDataAndSendEditPacket are too expensive
+  decompressVolumeData, recomputeMesh, computeShapeInfoWorker, and compressVolumeDataAndSendEditPacket are too expensive
   to run on a thread that has other things to do.  These use QtConcurrent::run to spawn a thread.  As each thread
   finishes, it adjusts the dirty flags so that the next call to render() will kick off the next step.
 
@@ -570,7 +571,7 @@ void RenderablePolyVoxEntityItem::render(RenderArgs* args) {
     if (voxelDataDirty) {
         decompressVolumeData();
     } else if (volDataDirty) {
-        getMesh();
+        recomputeMesh();
     }
 
     model::MeshPointer mesh;
@@ -1096,7 +1097,7 @@ void RenderablePolyVoxEntityItem::copyUpperEdgesFromNeighbors() {
     }
 }
 
-void RenderablePolyVoxEntityItem::getMesh() {
+void RenderablePolyVoxEntityItem::recomputeMesh() {
     // use _volData to make a renderable mesh
     PolyVoxSurfaceStyle voxelSurfaceStyle;
     withReadLock([&] {
@@ -1171,7 +1172,7 @@ void RenderablePolyVoxEntityItem::getMesh() {
 }
 
 void RenderablePolyVoxEntityItem::setMesh(model::MeshPointer mesh) {
-    // this catches the payload from getMesh
+    // this catches the payload from recomputeMesh
     bool neighborsNeedUpdate;
     withWriteLock([&] {
         _dirtyFlags |= Simulation::DIRTY_SHAPE | Simulation::DIRTY_MASS;
@@ -1426,7 +1427,6 @@ std::shared_ptr<RenderablePolyVoxEntityItem> RenderablePolyVoxEntityItem::getZPN
     return std::dynamic_pointer_cast<RenderablePolyVoxEntityItem>(_zPNeighbor.lock());
 }
 
-
 void RenderablePolyVoxEntityItem::bonkNeighbors() {
     // flag neighbors to the negative of this entity as needing to rebake their meshes.
     cacheNeighbors();
@@ -1446,7 +1446,6 @@ void RenderablePolyVoxEntityItem::bonkNeighbors() {
     }
 }
 
-
 void RenderablePolyVoxEntityItem::locationChanged(bool tellPhysics) {
     EntityItem::locationChanged(tellPhysics);
     if (!_pipeline || !render::Item::isValidID(_myItem)) {
@@ -1458,3 +1457,17 @@ void RenderablePolyVoxEntityItem::locationChanged(bool tellPhysics) {
 
     scene->enqueuePendingChanges(pendingChanges);
 }
+
+bool RenderablePolyVoxEntityItem::getMeshAsScriptValue(QScriptEngine *engine, QScriptValue& result) const {
+    bool success = false;
+    MeshProxy* meshProxy = nullptr;
+    model::MeshPointer mesh = nullptr;
+    withReadLock([&] {
+        if (_meshInitialized) {
+            success = true;
+            meshProxy = new MeshProxy(_mesh);
+        }
+    });
+    result = meshToScriptValue(engine, meshProxy);
+    return success;
+}

libraries/entities-renderer/src/RenderablePolyVoxEntityItem.h

@@ -130,6 +130,7 @@ public:
                            std::function<void(int, int, int, uint8_t)> thunk);
 
     void setMesh(model::MeshPointer mesh);
+    bool getMeshAsScriptValue(QScriptEngine *engine, QScriptValue& result) const override;
     void setCollisionPoints(ShapeInfo::PointCollection points, AABox box);
     PolyVox::SimpleVolume<uint8_t>* getVolData() { return _volData; }
 
@@ -164,7 +165,7 @@ private:
     ShapeInfo _shapeInfo;
 
     PolyVox::SimpleVolume<uint8_t>* _volData = nullptr;
-    bool _volDataDirty = false; // does getMesh need to be called?
+    bool _volDataDirty = false; // does recomputeMesh need to be called?
     int _onCount; // how many non-zero voxels are in _volData
 
     bool _neighborsNeedUpdate { false };
@@ -175,7 +176,7 @@ private:
     // these are run off the main thread
     void decompressVolumeData();
     void compressVolumeDataAndSendEditPacket();
-    virtual void getMesh() override; // recompute mesh
+    virtual void recomputeMesh() override; // recompute mesh
     void computeShapeInfoWorker();
 
     // these are cached lookups of _xNNeighborID, _yNNeighborID, _zNNeighborID, _xPNeighborID, _yPNeighborID, _zPNeighborID

libraries/entities/src/EntityScriptingInterface.cpp

@@ -822,8 +822,7 @@ void RayToEntityIntersectionResultFromScriptValue(const QScriptValue& object, Ra
     }
 }
 
-bool EntityScriptingInterface::setVoxels(QUuid entityID,
-                                         std::function<bool(PolyVoxEntityItem&)> actor) {
+bool EntityScriptingInterface::polyVoxWorker(QUuid entityID, std::function<bool(PolyVoxEntityItem&)> actor) {
     if (!_entityTree) {
         return false;
     }
@@ -887,32 +886,38 @@ bool EntityScriptingInterface::setPoints(QUuid entityID, std::function<bool(Line
 
 
 bool EntityScriptingInterface::setVoxelSphere(QUuid entityID, const glm::vec3& center, float radius, int value) {
-    return setVoxels(entityID, [center, radius, value](PolyVoxEntityItem& polyVoxEntity) {
-            return polyVoxEntity.setSphere(center, radius, value);
-        });
+    return polyVoxWorker(entityID, [center, radius, value](PolyVoxEntityItem& polyVoxEntity) {
+        return polyVoxEntity.setSphere(center, radius, value);
+    });
 }
 
 bool EntityScriptingInterface::setVoxel(QUuid entityID, const glm::vec3& position, int value) {
-    return setVoxels(entityID, [position, value](PolyVoxEntityItem& polyVoxEntity) {
-            return polyVoxEntity.setVoxelInVolume(position, value);
-        });
+    return polyVoxWorker(entityID, [position, value](PolyVoxEntityItem& polyVoxEntity) {
+        return polyVoxEntity.setVoxelInVolume(position, value);
+    });
 }
 
 bool EntityScriptingInterface::setAllVoxels(QUuid entityID, int value) {
-    return setVoxels(entityID, [value](PolyVoxEntityItem& polyVoxEntity) {
-            return polyVoxEntity.setAll(value);
-        });
+    return polyVoxWorker(entityID, [value](PolyVoxEntityItem& polyVoxEntity) {
+        return polyVoxEntity.setAll(value);
+    });
 }
 
 bool EntityScriptingInterface::setVoxelsInCuboid(QUuid entityID, const glm::vec3& lowPosition,
                                                  const glm::vec3& cuboidSize, int value) {
-    return setVoxels(entityID, [lowPosition, cuboidSize, value](PolyVoxEntityItem& polyVoxEntity) {
-            return polyVoxEntity.setCuboid(lowPosition, cuboidSize, value);
-        });
+    return polyVoxWorker(entityID, [lowPosition, cuboidSize, value](PolyVoxEntityItem& polyVoxEntity) {
+        return polyVoxEntity.setCuboid(lowPosition, cuboidSize, value);
+    });
 }
 
-MeshProxy* EntityScriptingInterface::voxelsToMesh(QUuid entityID) {
-    return nullptr;
+void EntityScriptingInterface::voxelsToMesh(QUuid entityID, QScriptValue callback) {
+    polyVoxWorker(entityID, [callback](PolyVoxEntityItem& polyVoxEntity) mutable {
+        QScriptValue mesh;
+        polyVoxEntity.getMeshAsScriptValue(callback.engine(), mesh);
+        QScriptValueList args { mesh };
+        callback.call(QScriptValue(), args);
+        return true;
+    });
 }
 
 bool EntityScriptingInterface::setAllPoints(QUuid entityID, const QVector<glm::vec3>& points) {

libraries/entities/src/EntityScriptingInterface.h

@@ -228,7 +228,7 @@ public slots:
     Q_INVOKABLE bool setAllVoxels(QUuid entityID, int value);
     Q_INVOKABLE bool setVoxelsInCuboid(QUuid entityID, const glm::vec3& lowPosition,
                                        const glm::vec3& cuboidSize, int value);
-    Q_INVOKABLE MeshProxy* voxelsToMesh(QUuid entityID);
+    Q_INVOKABLE void voxelsToMesh(QUuid entityID, QScriptValue callback);
 
     Q_INVOKABLE bool setAllPoints(QUuid entityID, const QVector<glm::vec3>& points);
     Q_INVOKABLE bool appendPoint(QUuid entityID, const glm::vec3& point);
@@ -321,7 +321,7 @@ signals:
 
 private:
     bool actionWorker(const QUuid& entityID, std::function<bool(EntitySimulationPointer, EntityItemPointer)> actor);
-    bool setVoxels(QUuid entityID, std::function<bool(PolyVoxEntityItem&)> actor);
+    bool polyVoxWorker(QUuid entityID, std::function<bool(PolyVoxEntityItem&)> actor);
     bool setPoints(QUuid entityID, std::function<bool(LineEntityItem&)> actor);
     void queueEntityMessage(PacketType packetType, EntityItemID entityID, const EntityItemProperties& properties);
 

libraries/entities/src/PolyVoxEntityItem.cpp

@@ -242,3 +242,7 @@ const QByteArray PolyVoxEntityItem::getVoxelData() const {
     });
     return voxelDataCopy;
 }
+
+bool PolyVoxEntityItem::getMeshAsScriptValue(QScriptEngine *engine, QScriptValue& result) const {
+    return false;
+}

libraries/entities/src/PolyVoxEntityItem.h

@@ -129,7 +129,9 @@ class PolyVoxEntityItem : public EntityItem {
     virtual void rebakeMesh() {};
 
     void setVoxelDataDirty(bool value) { withWriteLock([&] { _voxelDataDirty = value; }); }
-    virtual void getMesh() {}; // recompute mesh
+    virtual void recomputeMesh() {};
+
+    virtual bool getMeshAsScriptValue(QScriptEngine *engine, QScriptValue& result) const;
 
  protected:
     glm::vec3 _voxelVolumeSize; // this is always 3 bytes

libraries/script-engine/src/ModelScriptingInterface.cpp

@@ -9,6 +9,8 @@
 //  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
 //
 
+#include <QScriptEngine>
+#include <QtScript/QScriptValue>
 #include "ModelScriptingInterface.h"
 
 ModelScriptingInterface::ModelScriptingInterface(QObject* parent) : QObject(parent) {
@@ -23,9 +25,10 @@ MeshProxy::~MeshProxy() {
 
 
 QScriptValue meshToScriptValue(QScriptEngine* engine, MeshProxy* const &in) {
-    QScriptValue obj("something");
-    return obj;
+    return engine->newQObject(in, QScriptEngine::QtOwnership,
+                              QScriptEngine::ExcludeDeleteLater | QScriptEngine::ExcludeChildObjects);
 }
 
 void meshFromScriptValue(const QScriptValue& value, MeshProxy* &out) {
+    out = qobject_cast<MeshProxy*>(value.toQObject());
 }

libraries/script-engine/src/ModelScriptingInterface.h

@@ -37,6 +37,8 @@ public:
 
     MeshPointer getMeshPointer() const { return _mesh; }
 
+    Q_INVOKABLE int getNumVertices() const { return _mesh->getNumVertices(); }
+
 protected:
     MeshPointer _mesh;
 };