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Source/Engine/Physics/PhysicsSettings.h

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+// Copyright (c) 2012-2020 Wojciech Figat. All rights reserved.
+
+#pragma once
+
+#include "Engine/Core/Config/Settings.h"
+#include "Engine/Core/Math/Vector3.h"
+#include "Types.h"
+
+// Default values for the physics settings
+
+#define PhysicsSettings_DefaultGravity Vector3(0, -981.0f, 0)
+#define PhysicsSettings_TriangleMeshTriangleMinAreaThreshold (5.0f)
+#define PhysicsSettings_BounceThresholdVelocity (200.0f)
+#define PhysicsSettings_FrictionCombineMode PhysicsCombineMode::Average
+#define PhysicsSettings_RestitutionCombineMode PhysicsCombineMode::Average
+#define PhysicsSettings_DisableCCD false
+#define PhysicsSettings_EnableAdaptiveForce false
+#define PhysicsSettings_MaxDeltaTime (1.0f / 10.0f)
+#define PhysicsSettings_EnableSubstepping false
+#define PhysicsSettings_SubstepDeltaTime (1.0f / 120.0f)
+#define PhysicsSettings_MaxSubsteps 5
+#define PhysicsSettings_QueriesHitTriggers true
+#define PhysicsSettings_SupportCookingAtRuntime false
+
+/// <summary>
+/// Physics simulation settings container.
+/// </summary>
+/// <seealso cref="Settings{PhysicsSettings}" />
+class PhysicsSettings : public Settings<PhysicsSettings>
+{
+public:
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="PhysicsSettings"/> class.
+    /// </summary>
+    PhysicsSettings()
+    {
+        for (int32 i = 0; i < 32; i++)
+            LayerMasks[i] = MAX_uint32;
+    }
+
+public:
+
+    /// <summary>
+    /// The default gravity force value (in cm^2/s).
+    /// </summary>
+    Vector3 DefaultGravity = PhysicsSettings_DefaultGravity;
+
+    /// <summary>
+    /// Triangles from triangle meshes (CSG) with an area less than or equal to this value will be removed from physics collision data. Set to less than or equal 0 to disable.
+    /// </summary>
+    float TriangleMeshTriangleMinAreaThreshold = PhysicsSettings_TriangleMeshTriangleMinAreaThreshold;
+
+    /// <summary>
+    /// Minimum relative velocity required for an object to bounce. A typical value for simulation stability is about 0.2 * gravity
+    /// </summary>
+    float BounceThresholdVelocity = PhysicsSettings_BounceThresholdVelocity;
+
+    /// <summary>
+    /// Default friction combine mode, controls how friction is computed for multiple materials.
+    /// </summary>
+    PhysicsCombineMode FrictionCombineMode = PhysicsSettings_FrictionCombineMode;
+
+    /// <summary>
+    /// Default restitution combine mode, controls how restitution is computed for multiple materials.
+    /// </summary>
+    PhysicsCombineMode RestitutionCombineMode = PhysicsSettings_RestitutionCombineMode;
+
+    /// <summary>
+    /// If true CCD will be ignored. This is an optimization when CCD is never used which removes the need for physx to check it internally.
+    /// </summary>
+    bool DisableCCD = PhysicsSettings_DisableCCD;
+
+    /// <summary>
+    /// Enables adaptive forces to accelerate convergence of the solver. Can improve physics simulation performance but lead to artifacts.
+    /// </summary>
+    bool EnableAdaptiveForce = PhysicsSettings_EnableAdaptiveForce;
+
+    /// <summary>
+    /// The maximum allowed delta time (in seconds) for the physics simulation step.
+    /// </summary>
+    float MaxDeltaTime = PhysicsSettings_MaxDeltaTime;
+
+    /// <summary>
+    /// Whether to substep the physics simulation.
+    /// </summary>
+    bool EnableSubstepping = PhysicsSettings_EnableSubstepping;
+
+    /// <summary>
+    /// Delta time (in seconds) for an individual simulation substep.
+    /// </summary>
+    float SubstepDeltaTime = PhysicsSettings_SubstepDeltaTime;
+
+    /// <summary>
+    /// The maximum number of substeps for physics simulation.
+    /// </summary>
+    int32 MaxSubsteps = PhysicsSettings_MaxSubsteps;
+
+    /// <summary>
+    /// If enabled, any Raycast or other scene query that intersects with a Collider marked as a Trigger will returns with a hit. Individual raycasts can override this behavior.
+    /// </summary>
+    bool QueriesHitTriggers = PhysicsSettings_QueriesHitTriggers;
+
+    /// <summary>
+    /// Enables support for cooking physical collision shapes geometry at runtime. Use it to enable generating runtime terrain collision or convex mesh colliders.
+    /// </summary>
+    bool SupportCookingAtRuntime = PhysicsSettings_SupportCookingAtRuntime;
+
+public:
+
+    /// <summary>
+    /// The collision layers masks. Used to define layer-based collision detection.
+    /// </summary>
+    uint32 LayerMasks[32];
+
+public:
+
+    // [Settings]
+    void Apply() override;
+    void RestoreDefault() override;
+    void Deserialize(DeserializeStream& stream, ISerializeModifier* modifier) final override;
+};