852b923c21
git-svn-id: https://reactphysics3d.googlecode.com/svn/trunk@391 92aac97c-a6ce-11dd-a772-7fcde58d38e6
247 lines
12 KiB
C++
247 lines
12 KiB
C++
/********************************************************************************
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* ReactPhysics3D physics library, http://code.google.com/p/reactphysics3d/ *
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* Copyright (c) 2010 Daniel Chappuis *
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*********************************************************************************
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* *
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* Permission is hereby granted, free of charge, to any person obtaining a copy *
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* of this software and associated documentation files (the "Software"), to deal *
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* in the Software without restriction, including without limitation the rights *
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell *
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* copies of the Software, and to permit persons to whom the Software is *
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* furnished to do so, subject to the following conditions: *
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* *
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* The above copyright notice and this permission notice shall be included in *
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* all copies or substantial portions of the Software. *
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* *
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR *
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, *
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE *
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER *
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, *
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN *
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* THE SOFTWARE. *
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********************************************************************************/
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#ifndef RIGIDBODY_H
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#define RIGIDBODY_H
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// Libraries
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#include <cassert>
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#include "Body.h"
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#include "../mathematics/mathematics.h"
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// Namespace reactphysics3d
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namespace reactphysics3d {
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/* -------------------------------------------------------------------
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Class RigidBody :
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This class represents a rigid body of the physics
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engine. A rigid body is a non-deformable body that
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has a constant mass.
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-------------------------------------------------------------------
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*/
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class RigidBody : public Body {
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protected :
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Vector3D position; // Position of the center of mass of the body
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Vector3D oldPosition; // Old position used to compute the interpolated position
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Quaternion orientation; // Orientation quaternion of the body
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Quaternion oldOrientation; // Old orientation used to compute the interpolated orientation
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Vector3D linearVelocity; // Linear velocity of the body
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Vector3D angularVelocity; // Angular velocity of the body
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Vector3D externalForce; // Current external force on the body
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Vector3D externalTorque; // Current external torque on the body
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Matrix3x3 inertiaTensorLocal; // Local inertia tensor of the body (in body coordinates)
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Matrix3x3 inertiaTensorLocalInverse; // Inverse of the inertia tensor of the body (in body coordinates)
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double massInverse; // Inverse of the mass of the body
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double interpolationFactor; // Interpolation factor used for the state interpolation
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double restitution; // Coefficient of restitution (between 0 and 1), 1 for a very boucing body
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public :
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RigidBody(const Vector3D& position, const Quaternion& orientation, double mass,
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const Matrix3x3& inertiaTensorLocal, NarrowBoundingVolume* narrowBoundingVolume); // Constructor // Copy-constructor
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virtual ~RigidBody(); // Destructor
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Vector3D getPosition() const; // Return the position of the body
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void setPosition(const Vector3D& position); // Set the position of the body
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Quaternion getOrientation() const; // Return the orientation quaternion
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void setOrientation(const Quaternion& orientation); // Set the orientation quaternion
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Vector3D getLinearVelocity() const; // Return the linear velocity
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void setLinearVelocity(const Vector3D& linearVelocity); // Set the linear velocity of the body
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Vector3D getAngularVelocity() const; // Return the angular velocity
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void setAngularVelocity(const Vector3D& angularVelocity); // Set the angular velocity
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void setMassInverse(double massInverse); // Set the inverse of the mass
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Vector3D getExternalForce() const; // Return the current external force of the body
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void setExternalForce(const Vector3D& force); // Set the current external force on the body
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Vector3D getExternalTorque() const; // Return the current external torque of the body
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void setExternalTorque(const Vector3D& torque); // Set the current external torque of the body
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double getMassInverse() const; // Return the inverse of the mass of the body
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Matrix3x3 getInertiaTensorLocal() const; // Return the local inertia tensor of the body (in body coordinates)
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void setInertiaTensorLocal(const Matrix3x3& inertiaTensorLocal); // Set the local inertia tensor of the body (in body coordinates)
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Matrix3x3 getInertiaTensorLocalInverse() const; // Get the inverse of the inertia tensor
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Matrix3x3 getInertiaTensorWorld() const; // Return the inertia tensor in world coordinates
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Matrix3x3 getInertiaTensorInverseWorld() const; // Return the inverse of the inertia tensor in world coordinates
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void setInterpolationFactor(double factor); // Set the interpolation factor of the body
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Vector3D getInterpolatedPosition() const; // Return the interpolated position
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Quaternion getInterpolatedOrientation() const; // Return the interpolated orientation
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double getRestitution() const; // Get the restitution coefficient
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void setRestitution(double restitution) throw(std::invalid_argument); // Set the restitution coefficient
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void updateOldPositionAndOrientation(); // Update the previous position and orientation of the body
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void update(); // Update the rigid body in order to reflect a change in the body state
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};
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// --- Inline functions --- //
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// Return the position of the body
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inline Vector3D RigidBody::getPosition() const {
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return position;
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}
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// Set the position of the body
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inline void RigidBody::setPosition(const Vector3D& position) {
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this->position = position;
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}
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// Return the orientation quaternion of the body
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inline Quaternion RigidBody::getOrientation() const {
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return orientation;
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}
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// Set the orientation quaternion
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inline void RigidBody::setOrientation(const Quaternion& orientation) {
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this->orientation = orientation;
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// Normalize the orientation quaternion
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orientation.getUnit();
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}
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// Return the linear velocity
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inline Vector3D RigidBody::getLinearVelocity() const {
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return linearVelocity;
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}
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// Return the angular velocity of the body
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inline Vector3D RigidBody::getAngularVelocity() const {
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return angularVelocity;
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}
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inline void RigidBody::setAngularVelocity(const Vector3D& angularVelocity) {
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this->angularVelocity = angularVelocity;
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}
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// Set the inverse of the mass
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inline void RigidBody::setMassInverse(double massInverse) {
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this->massInverse = massInverse;
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}
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// Get the inverse of the inertia tensor
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inline Matrix3x3 RigidBody::getInertiaTensorLocalInverse() const {
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return inertiaTensorLocalInverse;
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}
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// Return the external force on the body
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inline Vector3D RigidBody::getExternalForce() const {
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return externalForce;
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}
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// Set the external force on the body
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inline void RigidBody::setExternalForce(const Vector3D& force) {
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this->externalForce = force;
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}
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// Return the current external torque on the body
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inline Vector3D RigidBody::getExternalTorque() const {
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return externalTorque;
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}
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// Set the current external torque on the body
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inline void RigidBody::setExternalTorque(const Vector3D& torque) {
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this->externalTorque = torque;
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}
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// Return the inverse of the mass of the body
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inline double RigidBody::getMassInverse() const {
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return massInverse;
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}
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// Return the local inertia tensor of the body (in body coordinates)
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inline Matrix3x3 RigidBody::getInertiaTensorLocal() const {
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return inertiaTensorLocal;
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}
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// Set the local inertia tensor of the body (in body coordinates)
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inline void RigidBody::setInertiaTensorLocal(const Matrix3x3& inertiaTensorLocal) {
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this->inertiaTensorLocal = inertiaTensorLocal;
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}
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// Return the inertia tensor in world coordinates
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// The inertia tensor I_w in world coordinates in computed with the local inertia tensor I_b in body coordinates
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// by I_w = R * I_b * R^T
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// where R is the rotation matrix (and R^T its transpose) of the current orientation quaternion of the body
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inline Matrix3x3 RigidBody::getInertiaTensorWorld() const {
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// Compute and return the inertia tensor in world coordinates
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return orientation.getMatrix() * inertiaTensorLocal * orientation.getMatrix().getTranspose();
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}
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// Return the inverse of the inertia tensor in world coordinates
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// The inertia tensor I_w in world coordinates in computed with the local inverse inertia tensor I_b^-1 in body coordinates
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// by I_w = R * I_b^-1 * R^T
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// where R is the rotation matrix (and R^T its transpose) of the current orientation quaternion of the body
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inline Matrix3x3 RigidBody::getInertiaTensorInverseWorld() const {
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// Compute and return the inertia tensor in world coordinates
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return orientation.getMatrix() * inertiaTensorLocalInverse * orientation.getMatrix().getTranspose();
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}
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// Set the interpolation factor of the body
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inline void RigidBody::setInterpolationFactor(double factor) {
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// Set the factor
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interpolationFactor = factor;
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}
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// Return the interpolated position
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inline Vector3D RigidBody::getInterpolatedPosition() const {
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// Compute the interpolated position
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return oldPosition * (1-interpolationFactor) + position * interpolationFactor;
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}
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// Return the interpolated orientation
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inline Quaternion RigidBody::getInterpolatedOrientation() const {
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// Compute the interpolated orientation
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return Quaternion::slerp(oldOrientation, orientation, interpolationFactor);
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}
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// Set the linear velocity of the rigid body
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inline void RigidBody::setLinearVelocity(const Vector3D& linearVelocity) {
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// If the body is able to move
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if (isMotionEnabled) {
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// Update the linear velocity of the current body state
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this->linearVelocity = linearVelocity;
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}
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}
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// Get the restitution coeffficient of the rigid body
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inline double RigidBody::getRestitution() const {
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return restitution;
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}
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// Set the restitution coefficient
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inline void RigidBody::setRestitution(double restitution) throw(std::invalid_argument) {
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// Check if the restitution coefficient is between 0 and 1
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if (restitution >= 0.0 && restitution <= 1.0) {
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this->restitution = restitution;
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}
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else {
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throw std::invalid_argument("Error : the restitution coefficent must be between 0 and 1");
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}
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}
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// Update the previous body state of the body
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// This is used to compute the interpolated position and orientation of the body
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inline void RigidBody::updateOldPositionAndOrientation() {
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oldPosition = position;
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oldOrientation = orientation;
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}
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} // End of the ReactPhyscis3D namespace
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#endif
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