126 lines
4.7 KiB
C++
126 lines
4.7 KiB
C++
// Copyright (c) Wojciech Figat. All rights reserved.
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#pragma once
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#include "ModelInstanceActor.h"
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#include "Engine/Content/Assets/Model.h"
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class Spline;
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/// <summary>
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/// Renders model over the spline segments.
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/// </summary>
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API_CLASS() class FLAXENGINE_API SplineModel : public ModelInstanceActor
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{
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DECLARE_SCENE_OBJECT(SplineModel);
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private:
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struct Instance
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{
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BoundingSphere Sphere;
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float RotDeterminant;
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};
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float _boundsScale = 1.0f, _quality = 1.0f;
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char _lodBias = 0;
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char _forcedLod = -1;
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bool _deformationDirty = false;
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Array<Instance> _instances;
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Transform _preTransform = Transform::Identity;
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Spline* _spline = nullptr;
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GPUBuffer* _deformationBuffer = nullptr;
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void* _deformationBufferData = nullptr;
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float _chunksPerSegment, _meshMinZ, _meshMaxZ;
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public:
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~SplineModel();
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/// <summary>
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/// The model asset to draw.
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/// </summary>
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API_FIELD(Attributes="EditorOrder(20), DefaultValue(null), EditorDisplay(\"Model\")")
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AssetReference<Model> Model;
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/// <summary>
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/// Gets the transformation applied to the model geometry before placing it over the spline. Can be used to change the way model goes over the spline.
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/// </summary>
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API_PROPERTY(Attributes="EditorOrder(21), EditorDisplay(\"Model\")")
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Transform GetPreTransform() const;
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/// <summary>
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/// Sets the transformation applied to the model geometry before placing it over the spline. Can be used to change the way model goes over the spline.
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/// </summary>
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API_PROPERTY() void SetPreTransform(const Transform& value);
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/// <summary>
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/// The draw passes to use for rendering this object.
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/// </summary>
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API_FIELD(Attributes="EditorOrder(15), DefaultValue(DrawPass.Default), EditorDisplay(\"Model\")")
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DrawPass DrawModes = DrawPass::Default;
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/// <summary>
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/// Gets the spline model quality scale. Higher values improve the spline representation (better tessellation) but reduce performance.
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/// </summary>
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API_PROPERTY(Attributes="EditorOrder(11), DefaultValue(1.0f), EditorDisplay(\"Model\"), Limit(0.1f, 100.0f, 0.1f)")
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float GetQuality() const;
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/// <summary>
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/// Sets the spline model quality scale. Higher values improve the spline representation (better tessellation) but reduce performance.
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/// </summary>
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API_PROPERTY() void SetQuality(float value);
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/// <summary>
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/// Gets the model bounds scale. It is useful when using Position Offset to animate the vertices of the object outside of its bounds.
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/// </summary>
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API_PROPERTY(Attributes="EditorOrder(12), DefaultValue(1.0f), EditorDisplay(\"Model\"), Limit(0, 10.0f, 0.1f)")
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float GetBoundsScale() const;
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/// <summary>
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/// Sets the model bounds scale. It is useful when using Position Offset to animate the vertices of the object outside of its bounds.
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/// </summary>
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API_PROPERTY() void SetBoundsScale(float value);
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/// <summary>
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/// Gets the model Level Of Detail bias value. Allows to increase or decrease rendered model quality.
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/// </summary>
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API_PROPERTY(Attributes="EditorOrder(40), DefaultValue(0), Limit(-100, 100, 0.1f), EditorDisplay(\"Model\", \"LOD Bias\")")
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int32 GetLODBias() const;
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/// <summary>
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/// Sets the model Level Of Detail bias value. Allows to increase or decrease rendered model quality.
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/// </summary>
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API_PROPERTY() void SetLODBias(int32 value);
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/// <summary>
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/// Gets the model forced Level Of Detail index. Allows to bind the given model LOD to show. Value -1 disables this feature.
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/// </summary>
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API_PROPERTY(Attributes="EditorOrder(50), DefaultValue(-1), Limit(-1, 100, 0.1f), EditorDisplay(\"Model\", \"Forced LOD\")")
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int32 GetForcedLOD() const;
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/// <summary>
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/// Sets the model forced Level Of Detail index. Allows to bind the given model LOD to show. Value -1 disables this feature.
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/// </summary>
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API_PROPERTY() void SetForcedLOD(int32 value);
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private:
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void OnModelChanged();
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void OnModelLoaded();
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void OnSplineUpdated();
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void UpdateDeformationBuffer();
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public:
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// [ModelInstanceActor]
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bool HasContentLoaded() const override;
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void Draw(RenderContext& renderContext) override;
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bool IntersectsItself(const Ray& ray, Real& distance, Vector3& normal) override;
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void Serialize(SerializeStream& stream, const void* otherObj) override;
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void Deserialize(DeserializeStream& stream, ISerializeModifier* modifier) override;
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void OnParentChanged() override;
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const Span<MaterialSlot> GetMaterialSlots() const override;
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MaterialBase* GetMaterial(int32 entryIndex) override;
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void UpdateBounds() override;
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protected:
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// [ModelInstanceActor]
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void OnActiveInTreeChanged() override;
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};
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