feat(datatypes): added instance reference data type

core/src/datatypes/meta.h

@@ -4,6 +4,7 @@
 #include <map>
 #include "base.h"
 #include "datatypes/color3.h"
+#include "datatypes/ref.h"
 #include "vector.h"
 #include "cframe.h"
 
@@ -24,7 +25,8 @@ namespace Data {
         String,
         Vector3,
         CFrame,
-        Color3
+        Color3,
+        InstanceRef
     > __VARIANT_TYPE;
 
     class Variant {

core/src/datatypes/ref.cpp

@@ -0,0 +1,34 @@
+#include "datatypes/ref.h"
+#include "color3.h"
+#include "meta.h" // IWYU pragma: keep
+#include <memory>
+#include "objects/base/instance.h"
+
+Data::InstanceRef::InstanceRef() {};
+Data::InstanceRef::InstanceRef(std::weak_ptr<Instance> instance) : ref(instance) {};
+Data::InstanceRef::~InstanceRef() = default;
+
+const Data::TypeInfo Data::InstanceRef::TYPE = {
+    .name = "Instance",
+    // .deserializer = &Data::InstanceRef::Deserialize,
+};
+
+const Data::TypeInfo& Data::InstanceRef::GetType() const { return Data::InstanceRef::TYPE; };
+
+const Data::String Data::InstanceRef::ToString() const {
+    return ref.expired() ? "" : ref.lock()->name;
+}
+
+Data::InstanceRef::operator std::weak_ptr<Instance>() {
+    return ref;
+}
+
+// Serialization
+
+void Data::InstanceRef::Serialize(pugi::xml_node node) const {
+    // node.text().set(this->ToHex());
+}
+
+// Data::Variant Data::Color3::Deserialize(pugi::xml_node node) {
+//     return Color3::FromHex(node.text().get());
+// }

core/src/datatypes/ref.h

@@ -0,0 +1,25 @@
+#pragma once
+
+#include "base.h"
+#include <memory>
+
+class Instance;
+
+namespace Data {
+    class InstanceRef : Base {
+        std::weak_ptr<Instance> ref;
+    public:
+        InstanceRef();
+        InstanceRef(std::weak_ptr<Instance>);
+        ~InstanceRef();
+
+        virtual const TypeInfo& GetType() const override;
+        static const TypeInfo TYPE;
+
+        operator std::weak_ptr<Instance>();
+
+        virtual const Data::String ToString() const override;
+        virtual void Serialize(pugi::xml_node node) const override;
+        // static Data::Variant Deserialize(pugi::xml_node node);
+    };
+}

core/src/objects/snap.cpp

@@ -1,8 +1,11 @@
 #include "snap.h"
 
+#include "datatypes/cframe.h"
+#include "datatypes/ref.h"
 #include "datatypes/vector.h"
 #include "workspace.h"
 #include "part.h"
+#include <memory>
 #include <reactphysics3d/constraint/FixedJoint.h>
 
 const InstanceType Snap::TYPE = {
@@ -16,30 +19,63 @@ const InstanceType* Snap::GetClass() {
 }
 
 Snap::Snap(): Instance(&TYPE) {
+    this->memberMap = std::make_unique<MemberMap>(MemberMap {
+        .super = std::move(this->memberMap),
+        .members = {
+            { "Part0", {
+                .backingField = &part0,
+                .type = &Data::InstanceRef::TYPE,
+                .codec = fieldCodecOf<Data::InstanceRef, std::weak_ptr<Instance>>(),
+                // .updateCallback = memberFunctionOf(&Part::onUpdated, this),
+            }}, { "Part1", {
+                .backingField = &part1,
+                .type = &Data::InstanceRef::TYPE,
+                .codec = fieldCodecOf<Data::InstanceRef, std::weak_ptr<Instance>>(),
+                // .updateCallback = memberFunctionOf(&Part::onUpdated, this),
+            }}, { "C0", {
+                .backingField = &c0,
+                .type = &Data::CFrame::TYPE,
+                .codec = fieldCodecOf<Data::CFrame>(),
+                // .updateCallback = memberFunctionOf(&Part::onUpdated, this),
+            }}, { "C1", {
+                .backingField = &c0,
+                .type = &Data::CFrame::TYPE,
+                .codec = fieldCodecOf<Data::CFrame>(),
+                // .updateCallback = memberFunctionOf(&Part::onUpdated, this),
+            }}, 
+        }
+    });
 }
 
 Snap::~Snap() {
 }
 
 void Snap::OnWorkspaceAdded(std::optional<std::shared_ptr<Workspace>> oldWorkspace, std::shared_ptr<Workspace> newWorkspace) {
-    if (part0.expired() || part1.expired()) return;
+    // Remove the existing joint if it does
+    if (this->joint && oldWorkspace) {
+        oldWorkspace.value()->physicsWorld->destroyJoint(this->joint);
+        this->joint = nullptr;
+    }
 
-    printVec((part0.lock()->cframe * (c1.Inverse() * c0)).Rotation().ToEulerAnglesXYZ());
-    printVec(part1.lock()->cframe.Rotation().ToEulerAnglesXYZ());
+    buildJoint();
+}
+
+void Snap::OnWorkspaceRemoved(std::optional<std::shared_ptr<Workspace>> oldWorkspace) {
+    if (!this->joint) return;
+
+    if (!oldWorkspace) oldWorkspace.value()->physicsWorld->destroyJoint(this->joint);
+    this->joint = nullptr;
+}
+
+void Snap::buildJoint() {
+    if (part0.expired() || part1.expired() || !workspace()) return;
     
     // Update Part1's rotation and cframe prior to creating the joint as reactphysics3d locks rotation based on how it
     // used to be rather than specifying an anchor rotation, so whatever.
     Data::CFrame newFrame = part0.lock()->cframe * (c1.Inverse() * c0);
     part1.lock()->cframe = newFrame;
-    newWorkspace->SyncPartPhysics(part1.lock());
+    workspace().value()->SyncPartPhysics(part1.lock());
 
     rp::FixedJointInfo jointInfo(part0.lock()->rigidBody, part1.lock()->rigidBody, (c0.Inverse() * c1).Position());
     this->joint = dynamic_cast<rp::FixedJoint*>(workspace().value()->physicsWorld->createJoint(jointInfo));
 }
-
-void Snap::OnWorkspaceRemoved(std::optional<std::shared_ptr<Workspace>> oldWorkspace) {
-    if (!this->joint || !oldWorkspace) return;
-
-    oldWorkspace.value()->physicsWorld->destroyJoint(this->joint);
-    this->joint = nullptr;
-}

core/src/objects/snap.h

@@ -7,10 +7,13 @@
 class Part;
 
 class Snap : public Instance {
-    rp::FixedJoint* joint;
+    rp::FixedJoint* joint = nullptr;
 protected:
     void OnWorkspaceAdded(std::optional<std::shared_ptr<Workspace>> oldWorkspace, std::shared_ptr<Workspace> newWorkspace) override;
     void OnWorkspaceRemoved(std::optional<std::shared_ptr<Workspace>> oldWorkspace) override;
+
+    void buildJoint();
+    void breakJoint();
 public:
     const static InstanceType TYPE;
 

editor/mainwindow.cpp

@@ -151,25 +151,25 @@ MainWindow::MainWindow(QWidget *parent)
         .color = glm::vec3(0.639216f, 0.635294f, 0.647059f),
     }));
     gWorkspace()->SyncPartPhysics(ui->mainWidget->lastPart);
-    // auto part0 = ui->mainWidget->lastPart;
+    auto part0 = ui->mainWidget->lastPart;
 
-    // gWorkspace()->AddChild(ui->mainWidget->lastPart = Part::New({
-    //     .position = glm::vec3(1.6691498, 0.82489049, -0.73040605),
-    //     // .rotation = glm::vec3(0.5, 2, 1),
-    //     .rotation = glm::vec3(-2.6415927, 1.1415926, -2.141639),
-    //     .size = glm::vec3(4, 1.2, 2),
-    //     .color = glm::vec3(0.639216f, 0.635294f, 0.647059f),
-    // }));
-    // gWorkspace()->SyncPartPhysics(ui->mainWidget->lastPart);
-    // auto part1 = ui->mainWidget->lastPart;
+    gWorkspace()->AddChild(ui->mainWidget->lastPart = Part::New({
+        .position = glm::vec3(1.6691498, 0.82489049, -0.73040605),
+        // .rotation = glm::vec3(0.5, 2, 1),
+        .rotation = glm::vec3(-2.6415927, 1.1415926, -2.141639),
+        .size = glm::vec3(4, 1.2, 2),
+        .color = glm::vec3(0.639216f, 0.635294f, 0.647059f),
+    }));
+    gWorkspace()->SyncPartPhysics(ui->mainWidget->lastPart);
+    auto part1 = ui->mainWidget->lastPart;
 
-    // auto snap = Snap::New();
-    // snap->part0 = part0;
-    // snap->part1 = part1;
-    // snap->c0 = part1->cframe;
-    // snap->c1 = part0->cframe;
+    auto snap = Snap::New();
+    snap->part0 = part0;
+    snap->part1 = part1;
+    snap->c0 = part1->cframe;
+    snap->c1 = part0->cframe;
 
-    // gWorkspace()->AddChild(snap);
+    gWorkspace()->AddChild(snap);
 }
 
 void MainWindow::closeEvent(QCloseEvent* evt) {