53 lines
2.4 KiB
C
53 lines
2.4 KiB
C
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// Jolt Physics Library (https://github.com/jrouwe/JoltPhysics)
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// SPDX-FileCopyrightText: 2021 Jorrit Rouwe
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// SPDX-License-Identifier: MIT
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#pragma once
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#include <Tests/Test.h>
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#include <Jolt/Physics/Collision/ContactListener.h>
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#include <Jolt/Physics/Collision/PhysicsMaterialSimple.h>
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class FrictionPerTriangleTest : public Test, public ContactListener
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{
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public:
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JPH_DECLARE_RTTI_VIRTUAL(JPH_NO_EXPORT, FrictionPerTriangleTest)
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// Description of the test
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virtual const char *GetDescription() const override
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{
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return "Demonstrates how you can use a contact listener and your own material definition to get friction and restitution per triangle or per sub shape of a compound shape.\n"
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"Friction increases while going down the slope. Box should eventually stop.";
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}
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// See: Test
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virtual void Initialize() override;
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/// A custom material implementation that stores its own friction and restitution
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/// Note: Make sure you set PhysicsMaterial::sDefault to something your application understands (explicitly check PhysicsMaterial::sDefault to prevent casting to the wrong type in sGetFrictionAndRestitution)
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class MyMaterial : public PhysicsMaterialSimple
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{
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public:
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// Note: Not implementing serialization because we don't serialize this material in this example!
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/// Constructor
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MyMaterial(const string_view &inName, ColorArg inColor, float inFriction, float inRestitution) : PhysicsMaterialSimple(inName, inColor), mFriction(inFriction), mRestitution(inRestitution) { }
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float mFriction;
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float mRestitution;
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};
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/// Extract custom friction and restitution from a body and sub shape ID
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static void sGetFrictionAndRestitution(const Body &inBody, const SubShapeID &inSubShapeID, float &outFriction, float &outRestitution);
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/// Calculates and overrides friction and restitution settings for a contact between two bodies
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static void sOverrideContactSettings(const Body &inBody1, const Body &inBody2, const ContactManifold &inManifold, ContactSettings &ioSettings);
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// If this test implements a contact listener, it should be returned here
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virtual ContactListener *GetContactListener() override { return this; }
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// See: ContactListener
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virtual void OnContactAdded(const Body &inBody1, const Body &inBody2, const ContactManifold &inManifold, ContactSettings &ioSettings) override;
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virtual void OnContactPersisted(const Body &inBody1, const Body &inBody2, const ContactManifold &inManifold, ContactSettings &ioSettings) override;
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};
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