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Source/Engine/Level/Actors/BoxVolume.cpp

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+// Copyright (c) 2012-2020 Wojciech Figat. All rights reserved.
+
+#include "BoxVolume.h"
+#include "Engine/Serialization/Serialization.h"
+
+BoxVolume::BoxVolume(const SpawnParams& params)
+    : Actor(params)
+    , _size(1000.0f)
+{
+}
+
+void BoxVolume::SetSize(const Vector3& value)
+{
+    if (!Vector3::NearEqual(value, _size))
+    {
+        const auto prevBounds = _box;
+        _size = value;
+        OrientedBoundingBox::CreateCentered(Vector3::Zero, _size, _bounds);
+        _bounds.Transform(_transform.GetWorld());
+        _bounds.GetBoundingBox(_box);
+        BoundingSphere::FromBox(_box, _sphere);
+        OnBoundsChanged(prevBounds);
+    }
+}
+
+#if USE_EDITOR
+
+#include "Engine/Debug/DebugDraw.h"
+
+void BoxVolume::OnDebugDraw()
+{
+    const Color color = GetWiresColor();
+    DEBUG_DRAW_WIRE_BOX(_bounds, color, 0, true);
+
+    // Base
+    Actor::OnDebugDraw();
+}
+
+namespace
+{
+    OrientedBoundingBox GetWriteBox(const Vector3& min, const Vector3& max, const float margin)
+    {
+        OrientedBoundingBox box;
+        const Vector3 vec = max - min;
+        const Vector3 dir = Vector3::Normalize(vec);
+        Quaternion orientation;
+        if (Vector3::Dot(dir, Vector3::Up) >= 0.999f)
+            Quaternion::RotationAxis(Vector3::Left, PI_HALF, orientation);
+        else
+            Quaternion::LookRotation(dir, Vector3::Cross(Vector3::Cross(dir, Vector3::Up), dir), orientation);
+        const Vector3 up = orientation * Vector3::Up;
+        Matrix::CreateWorld(min + vec * 0.5f, dir, up, box.Transformation);
+        Matrix inv;
+        Matrix::Invert(box.Transformation, inv);
+        Vector3 vecLocal;
+        Vector3::TransformNormal(vec * 0.5f, inv, vecLocal);
+        box.Extents.X = margin;
+        box.Extents.Y = margin;
+        box.Extents.Z = vecLocal.Z;
+        return box;
+    }
+}
+
+void BoxVolume::OnDebugDrawSelected()
+{
+    const Color color = GetWiresColor();
+    DEBUG_DRAW_WIRE_BOX(_bounds, color * 0.3f, 0, false);
+
+    Vector3 sideLinks[] =
+    {
+        Vector3(0.5f, 0, 0),
+        Vector3(-0.5f, 0, 0),
+        Vector3(0, 0.5f, 0),
+        Vector3(0, -0.5f, 0),
+        Vector3(0, 0, 0.5f),
+        Vector3(0, 0, -0.5f),
+    };
+    Vector3 sideLinksFinal[6];
+    for (int32 i = 0; i < 6; i++)
+    {
+        sideLinksFinal[i] = sideLinks[i] * _size;
+    }
+    _transform.LocalToWorld(sideLinksFinal, 6, sideLinksFinal);
+    for (int32 i = 0; i < 6; i++)
+    {
+        DEBUG_DRAW_WIRE_SPHERE(BoundingSphere(sideLinksFinal[i], 10.0f), Color::YellowGreen, 0, true);
+    }
+
+    Vector3 corners[8];
+    _bounds.GetCorners(corners);
+    const float margin = 2.0f;
+    const Color wiresColor = color.AlphaMultiplied(0.8f);
+    DEBUG_DRAW_BOX(GetWriteBox(corners[0], corners[1], margin), wiresColor, 0, true);
+    DEBUG_DRAW_BOX(GetWriteBox(corners[0], corners[3], margin), wiresColor, 0, true);
+    DEBUG_DRAW_BOX(GetWriteBox(corners[0], corners[4], margin), wiresColor, 0, true);
+    DEBUG_DRAW_BOX(GetWriteBox(corners[1], corners[2], margin), wiresColor, 0, true);
+    DEBUG_DRAW_BOX(GetWriteBox(corners[1], corners[5], margin), wiresColor, 0, true);
+    DEBUG_DRAW_BOX(GetWriteBox(corners[2], corners[3], margin), wiresColor, 0, true);
+    DEBUG_DRAW_BOX(GetWriteBox(corners[2], corners[6], margin), wiresColor, 0, true);
+    DEBUG_DRAW_BOX(GetWriteBox(corners[3], corners[7], margin), wiresColor, 0, true);
+    DEBUG_DRAW_BOX(GetWriteBox(corners[4], corners[5], margin), wiresColor, 0, true);
+    DEBUG_DRAW_BOX(GetWriteBox(corners[4], corners[7], margin), wiresColor, 0, true);
+    DEBUG_DRAW_BOX(GetWriteBox(corners[5], corners[6], margin), wiresColor, 0, true);
+    DEBUG_DRAW_BOX(GetWriteBox(corners[6], corners[7], margin), wiresColor, 0, true);
+
+    // Base
+    Actor::OnDebugDrawSelected();
+}
+
+#endif
+
+void BoxVolume::Serialize(SerializeStream& stream, const void* otherObj)
+{
+    // Base
+    Actor::Serialize(stream, otherObj);
+
+    SERIALIZE_GET_OTHER_OBJ(BoxVolume);
+
+    SERIALIZE_MEMBER(Size, _size);
+}
+
+void BoxVolume::Deserialize(DeserializeStream& stream, ISerializeModifier* modifier)
+{
+    // Base
+    Actor::Deserialize(stream, modifier);
+
+    DESERIALIZE_MEMBER(Size, _size);
+}
+
+void BoxVolume::OnTransformChanged()
+{
+    // Base
+    Actor::OnTransformChanged();
+
+    OrientedBoundingBox::CreateCentered(Vector3::Zero, _size, _bounds);
+    _bounds.Transform(_transform.GetWorld());
+    _bounds.GetBoundingBox(_box);
+    BoundingSphere::FromBox(_box, _sphere);
+}