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529 lines
16 KiB
529 lines
16 KiB
//========= Copyright © 1996-2005, Valve Corporation, All rights reserved. ============// |
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// |
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// Purpose: Used to fire events based on the orientation of a given entity. |
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// |
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// Looks at its target's anglular velocity every frame and fires outputs |
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// as the angular velocity passes a given threshold value. |
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// |
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//=============================================================================// |
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#include "cbase.h" |
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#include "entityinput.h" |
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#include "entityoutput.h" |
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#include "eventqueue.h" |
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#include "mathlib/mathlib.h" |
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// memdbgon must be the last include file in a .cpp file!!! |
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#include "tier0/memdbgon.h" |
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enum |
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{ |
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AVELOCITY_SENSOR_NO_LAST_RESULT = -2 |
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}; |
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ConVar g_debug_angularsensor( "g_debug_angularsensor", "0", FCVAR_CHEAT ); |
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class CPointAngularVelocitySensor : public CPointEntity |
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{ |
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DECLARE_CLASS( CPointAngularVelocitySensor, CPointEntity ); |
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public: |
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CPointAngularVelocitySensor(); |
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void Activate(void); |
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void Spawn(void); |
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void Think(void); |
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private: |
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float SampleAngularVelocity(CBaseEntity *pEntity); |
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int CompareToThreshold(CBaseEntity *pEntity, float flThreshold, bool bFireVelocityOutput); |
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void FireCompareOutput(int nCompareResult, CBaseEntity *pActivator); |
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void DrawDebugLines( void ); |
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// Input handlers |
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void InputTest( inputdata_t &inputdata ); |
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void InputTestWithInterval( inputdata_t &inputdata ); |
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EHANDLE m_hTargetEntity; // Entity whose angles are being monitored. |
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float m_flThreshold; // The threshold angular velocity that we are looking for. |
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int m_nLastCompareResult; // The comparison result from our last measurement, expressed as -1, 0, or 1 |
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int m_nLastFireResult; // The last result for which we fire the output. |
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float m_flFireTime; |
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float m_flFireInterval; |
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float m_flLastAngVelocity; |
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QAngle m_lastOrientation; |
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Vector m_vecAxis; |
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bool m_bUseHelper; |
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// Outputs |
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COutputFloat m_AngularVelocity; |
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// Compare the target's angular velocity to the threshold velocity and fire the appropriate output. |
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// These outputs are filtered by m_flFireInterval to ignore excessive oscillations. |
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COutputEvent m_OnLessThan; |
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COutputEvent m_OnLessThanOrEqualTo; |
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COutputEvent m_OnGreaterThan; |
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COutputEvent m_OnGreaterThanOrEqualTo; |
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COutputEvent m_OnEqualTo; |
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DECLARE_DATADESC(); |
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}; |
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LINK_ENTITY_TO_CLASS(point_angularvelocitysensor, CPointAngularVelocitySensor); |
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BEGIN_DATADESC( CPointAngularVelocitySensor ) |
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// Fields |
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DEFINE_FIELD( m_hTargetEntity, FIELD_EHANDLE ), |
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DEFINE_KEYFIELD(m_flThreshold, FIELD_FLOAT, "threshold"), |
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DEFINE_FIELD(m_nLastCompareResult, FIELD_INTEGER), |
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DEFINE_FIELD( m_nLastFireResult, FIELD_INTEGER ), |
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DEFINE_FIELD( m_flFireTime, FIELD_TIME ), |
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DEFINE_KEYFIELD( m_flFireInterval, FIELD_FLOAT, "fireinterval" ), |
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DEFINE_FIELD( m_flLastAngVelocity, FIELD_FLOAT ), |
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DEFINE_FIELD( m_lastOrientation, FIELD_VECTOR ), |
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// Inputs |
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DEFINE_INPUTFUNC(FIELD_VOID, "Test", InputTest), |
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DEFINE_INPUTFUNC(FIELD_VOID, "TestWithInterval", InputTestWithInterval), |
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// Outputs |
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DEFINE_OUTPUT(m_OnLessThan, "OnLessThan"), |
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DEFINE_OUTPUT(m_OnLessThanOrEqualTo, "OnLessThanOrEqualTo"), |
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DEFINE_OUTPUT(m_OnGreaterThan, "OnGreaterThan"), |
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DEFINE_OUTPUT(m_OnGreaterThanOrEqualTo, "OnGreaterThanOrEqualTo"), |
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DEFINE_OUTPUT(m_OnEqualTo, "OnEqualTo"), |
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DEFINE_OUTPUT(m_AngularVelocity, "AngularVelocity"), |
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DEFINE_KEYFIELD( m_vecAxis, FIELD_VECTOR, "axis" ), |
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DEFINE_KEYFIELD( m_bUseHelper, FIELD_BOOLEAN, "usehelper" ), |
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END_DATADESC() |
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//----------------------------------------------------------------------------- |
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// Purpose: constructor provides default values |
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//----------------------------------------------------------------------------- |
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CPointAngularVelocitySensor::CPointAngularVelocitySensor() |
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{ |
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m_flFireInterval = 0.2f; |
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} |
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//----------------------------------------------------------------------------- |
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// Purpose: Called when spawning after parsing keyvalues. |
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//----------------------------------------------------------------------------- |
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void CPointAngularVelocitySensor::Spawn(void) |
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{ |
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m_flThreshold = fabs(m_flThreshold); |
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m_nLastFireResult = AVELOCITY_SENSOR_NO_LAST_RESULT; |
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m_nLastCompareResult = AVELOCITY_SENSOR_NO_LAST_RESULT; |
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// m_flFireInterval = 0.2; |
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m_lastOrientation = vec3_angle; |
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} |
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//----------------------------------------------------------------------------- |
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// Purpose: Called after all entities in the map have spawned. |
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//----------------------------------------------------------------------------- |
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void CPointAngularVelocitySensor::Activate(void) |
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{ |
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BaseClass::Activate(); |
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m_hTargetEntity = gEntList.FindEntityByName( NULL, m_target ); |
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if (m_hTargetEntity) |
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{ |
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SetNextThink( gpGlobals->curtime ); |
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} |
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} |
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//----------------------------------------------------------------------------- |
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// Purpose: Draws magic lines... |
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//----------------------------------------------------------------------------- |
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void CPointAngularVelocitySensor::DrawDebugLines( void ) |
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{ |
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if ( m_hTargetEntity ) |
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{ |
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Vector vForward, vRight, vUp; |
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AngleVectors( m_hTargetEntity->GetAbsAngles(), &vForward, &vRight, &vUp ); |
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NDebugOverlay::Line( GetAbsOrigin(), GetAbsOrigin() + vForward * 64, 255, 0, 0, false, 0 ); |
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NDebugOverlay::Line( GetAbsOrigin(), GetAbsOrigin() + vRight * 64, 0, 255, 0, false, 0 ); |
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NDebugOverlay::Line( GetAbsOrigin(), GetAbsOrigin() + vUp * 64, 0, 0, 255, false, 0 ); |
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} |
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if ( m_bUseHelper == true ) |
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{ |
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QAngle Angles; |
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Vector vAxisForward, vAxisRight, vAxisUp; |
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Vector vLine = m_vecAxis - GetAbsOrigin(); |
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VectorNormalize( vLine ); |
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VectorAngles( vLine, Angles ); |
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AngleVectors( Angles, &vAxisForward, &vAxisRight, &vAxisUp ); |
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NDebugOverlay::Line( GetAbsOrigin(), GetAbsOrigin() + vAxisForward * 64, 255, 0, 0, false, 0 ); |
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NDebugOverlay::Line( GetAbsOrigin(), GetAbsOrigin() + vAxisRight * 64, 0, 255, 0, false, 0 ); |
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NDebugOverlay::Line( GetAbsOrigin(), GetAbsOrigin() + vAxisUp * 64, 0, 0, 255, false, 0 ); |
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} |
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} |
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//----------------------------------------------------------------------------- |
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// Purpose: Returns the magnitude of the entity's angular velocity. |
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//----------------------------------------------------------------------------- |
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float CPointAngularVelocitySensor::SampleAngularVelocity(CBaseEntity *pEntity) |
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{ |
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if (pEntity->GetMoveType() == MOVETYPE_VPHYSICS) |
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{ |
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IPhysicsObject *pPhys = pEntity->VPhysicsGetObject(); |
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if (pPhys != NULL) |
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{ |
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Vector vecVelocity; |
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AngularImpulse vecAngVelocity; |
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pPhys->GetVelocity(&vecVelocity, &vecAngVelocity); |
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QAngle angles; |
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pPhys->GetPosition( NULL, &angles ); |
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float dt = gpGlobals->curtime - GetLastThink(); |
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if ( dt == 0 ) |
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dt = 0.1; |
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// HACKHACK: We don't expect a real 'delta' orientation here, just enough of an error estimate to tell if this thing |
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// is trying to move, but failing. |
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QAngle delta = angles - m_lastOrientation; |
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if ( ( delta.Length() / dt ) < ( vecAngVelocity.Length() * 0.01 ) ) |
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{ |
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return 0.0f; |
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} |
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m_lastOrientation = angles; |
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if ( m_bUseHelper == false ) |
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{ |
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return vecAngVelocity.Length(); |
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} |
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else |
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{ |
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Vector vLine = m_vecAxis - GetAbsOrigin(); |
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VectorNormalize( vLine ); |
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Vector vecWorldAngVelocity; |
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pPhys->LocalToWorldVector( &vecWorldAngVelocity, vecAngVelocity ); |
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float flDot = DotProduct( vecWorldAngVelocity, vLine ); |
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return flDot; |
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} |
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} |
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} |
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else |
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{ |
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QAngle vecAngVel = pEntity->GetLocalAngularVelocity(); |
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float flMax = MAX(fabs(vecAngVel[PITCH]), fabs(vecAngVel[YAW])); |
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return MAX(flMax, fabs(vecAngVel[ROLL])); |
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} |
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return 0; |
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} |
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//----------------------------------------------------------------------------- |
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// Purpose: Compares the given entity's angular velocity to the threshold velocity. |
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// Input : pEntity - Entity whose angular velocity is being measured. |
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// flThreshold - |
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// Output : Returns -1 if less than, 0 if equal to, or 1 if greater than the threshold. |
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//----------------------------------------------------------------------------- |
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int CPointAngularVelocitySensor::CompareToThreshold(CBaseEntity *pEntity, float flThreshold, bool bFireVelocityOutput) |
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{ |
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if (pEntity == NULL) |
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{ |
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return 0; |
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} |
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float flAngVelocity = SampleAngularVelocity(pEntity); |
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if ( g_debug_angularsensor.GetBool() ) |
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{ |
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DrawDebugLines(); |
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} |
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if (bFireVelocityOutput && (flAngVelocity != m_flLastAngVelocity)) |
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{ |
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m_AngularVelocity.Set(flAngVelocity, pEntity, this); |
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m_flLastAngVelocity = flAngVelocity; |
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} |
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if (flAngVelocity > flThreshold) |
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{ |
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return 1; |
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} |
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if (flAngVelocity == flThreshold) |
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{ |
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return 0; |
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} |
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return -1; |
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} |
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//----------------------------------------------------------------------------- |
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// Called every frame to sense the angular velocity of the target entity. |
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// Output is filtered by m_flFireInterval to ignore excessive oscillations. |
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//----------------------------------------------------------------------------- |
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void CPointAngularVelocitySensor::Think(void) |
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{ |
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if (m_hTargetEntity != NULL) |
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{ |
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// |
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// Check to see if the measure entity's angular velocity has been within |
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// tolerance of the threshold for the given period of time. |
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// |
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int nCompare = CompareToThreshold(m_hTargetEntity, m_flThreshold, true); |
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if (nCompare != m_nLastCompareResult) |
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{ |
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// If we've oscillated back to where we last fired the output, don't |
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// fire the same output again. |
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if (nCompare == m_nLastFireResult) |
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{ |
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m_flFireTime = 0; |
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} |
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else if (m_nLastCompareResult != AVELOCITY_SENSOR_NO_LAST_RESULT) |
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{ |
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// |
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// The value has changed -- reset the timer. We'll fire the output if |
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// it stays at this value until the interval expires. |
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// |
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m_flFireTime = gpGlobals->curtime + m_flFireInterval; |
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} |
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m_nLastCompareResult = nCompare; |
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} |
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else if ((m_flFireTime != 0) && (gpGlobals->curtime >= m_flFireTime)) |
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{ |
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// |
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// The compare result has held steady long enough -- time to |
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// fire the output. |
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// |
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FireCompareOutput(nCompare, this); |
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m_nLastFireResult = nCompare; |
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m_flFireTime = 0; |
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} |
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SetNextThink( gpGlobals->curtime ); |
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} |
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} |
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//----------------------------------------------------------------------------- |
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// Fires the output after the fire interval if the velocity is stable. |
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//----------------------------------------------------------------------------- |
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void CPointAngularVelocitySensor::InputTestWithInterval( inputdata_t &inputdata ) |
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{ |
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if (m_hTargetEntity != NULL) |
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{ |
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m_flFireTime = gpGlobals->curtime + m_flFireInterval; |
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m_nLastFireResult = AVELOCITY_SENSOR_NO_LAST_RESULT; |
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m_nLastCompareResult = CompareToThreshold(m_hTargetEntity, m_flThreshold, true); |
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SetNextThink( gpGlobals->curtime ); |
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} |
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} |
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//----------------------------------------------------------------------------- |
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// Purpose: Input handler for forcing an instantaneous test of the condition. |
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//----------------------------------------------------------------------------- |
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void CPointAngularVelocitySensor::InputTest( inputdata_t &inputdata ) |
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{ |
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int nCompareResult = CompareToThreshold(m_hTargetEntity, m_flThreshold, false); |
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FireCompareOutput(nCompareResult, inputdata.pActivator); |
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} |
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//----------------------------------------------------------------------------- |
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// Purpose: Fires the appropriate output based on the given comparison result. |
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// Input : nCompareResult - |
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// pActivator - |
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//----------------------------------------------------------------------------- |
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void CPointAngularVelocitySensor::FireCompareOutput( int nCompareResult, CBaseEntity *pActivator ) |
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{ |
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if (nCompareResult == -1) |
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{ |
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m_OnLessThan.FireOutput(pActivator, this); |
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m_OnLessThanOrEqualTo.FireOutput(pActivator, this); |
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} |
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else if (nCompareResult == 1) |
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{ |
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m_OnGreaterThan.FireOutput(pActivator, this); |
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m_OnGreaterThanOrEqualTo.FireOutput(pActivator, this); |
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} |
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else |
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{ |
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m_OnEqualTo.FireOutput(pActivator, this); |
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m_OnLessThanOrEqualTo.FireOutput(pActivator, this); |
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m_OnGreaterThanOrEqualTo.FireOutput(pActivator, this); |
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} |
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} |
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// ============================================================================ |
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// |
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// Simple velocity sensor |
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// |
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// ============================================================================ |
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class CPointVelocitySensor : public CPointEntity |
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{ |
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DECLARE_CLASS( CPointVelocitySensor, CPointEntity ); |
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public: |
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void Spawn(); |
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void Activate( void ); |
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void Think( void ); |
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private: |
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void SampleVelocity( void ); |
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EHANDLE m_hTargetEntity; // Entity whose angles are being monitored. |
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Vector m_vecAxis; // Axis along which to measure the speed. |
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bool m_bEnabled; // Whether we're measuring or not |
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// Outputs |
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float m_fPrevVelocity; // stores velocity from last frame, so we only write the output if it has changed |
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COutputFloat m_Velocity; |
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void InputEnable( inputdata_t &inputdata ); |
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void InputDisable( inputdata_t &inputdata ); |
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DECLARE_DATADESC(); |
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}; |
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LINK_ENTITY_TO_CLASS( point_velocitysensor, CPointVelocitySensor ); |
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BEGIN_DATADESC( CPointVelocitySensor ) |
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// Fields |
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DEFINE_FIELD( m_hTargetEntity, FIELD_EHANDLE ), |
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DEFINE_KEYFIELD( m_vecAxis, FIELD_VECTOR, "axis" ), |
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DEFINE_KEYFIELD( m_bEnabled, FIELD_BOOLEAN, "enabled" ), |
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DEFINE_FIELD( m_fPrevVelocity, FIELD_FLOAT ), |
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// Outputs |
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DEFINE_OUTPUT( m_Velocity, "Velocity" ), |
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DEFINE_INPUTFUNC( FIELD_VOID, "Enable", InputEnable ), |
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DEFINE_INPUTFUNC( FIELD_VOID, "Disable", InputDisable ), |
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END_DATADESC() |
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//----------------------------------------------------------------------------- |
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//----------------------------------------------------------------------------- |
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void CPointVelocitySensor::Spawn() |
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{ |
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Vector vLine = m_vecAxis - GetAbsOrigin(); |
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VectorNormalize( vLine ); |
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m_vecAxis = vLine; |
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} |
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//----------------------------------------------------------------------------- |
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// Purpose: |
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//----------------------------------------------------------------------------- |
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void CPointVelocitySensor::Activate( void ) |
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{ |
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BaseClass::Activate(); |
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m_hTargetEntity = gEntList.FindEntityByName( NULL, m_target ); |
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if ( m_bEnabled && m_hTargetEntity ) |
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{ |
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SetNextThink( gpGlobals->curtime ); |
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} |
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} |
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//----------------------------------------------------------------------------- |
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// Purpose: |
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//----------------------------------------------------------------------------- |
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void CPointVelocitySensor::InputEnable( inputdata_t &inputdata ) |
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{ |
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// Don't interrupt us if we're already enabled |
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if ( m_bEnabled ) |
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return; |
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m_bEnabled = true; |
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if ( m_hTargetEntity ) |
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{ |
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SetNextThink( gpGlobals->curtime ); |
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} |
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} |
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//----------------------------------------------------------------------------- |
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// Purpose: |
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//----------------------------------------------------------------------------- |
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void CPointVelocitySensor::InputDisable( inputdata_t &inputdata ) |
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{ |
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m_bEnabled = false; |
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} |
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//----------------------------------------------------------------------------- |
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// Purpose: Called every frame |
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//----------------------------------------------------------------------------- |
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void CPointVelocitySensor::Think( void ) |
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{ |
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if ( m_hTargetEntity != NULL && m_bEnabled ) |
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{ |
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SampleVelocity(); |
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SetNextThink( gpGlobals->curtime ); |
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} |
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} |
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//----------------------------------------------------------------------------- |
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// Purpose: Returns the magnitude of the entity's angular velocity. |
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//----------------------------------------------------------------------------- |
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void CPointVelocitySensor::SampleVelocity( void ) |
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{ |
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if ( m_hTargetEntity == NULL ) |
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return; |
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Vector vecVelocity; |
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if ( m_hTargetEntity->GetMoveType() == MOVETYPE_VPHYSICS ) |
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{ |
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IPhysicsObject *pPhys = m_hTargetEntity->VPhysicsGetObject(); |
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if ( pPhys != NULL ) |
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{ |
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pPhys->GetVelocity( &vecVelocity, NULL ); |
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} |
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} |
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else |
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{ |
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vecVelocity = m_hTargetEntity->GetAbsVelocity(); |
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} |
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/* |
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float flSpeed = VectorNormalize( vecVelocity ); |
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float flDot = ( m_vecAxis != vec3_origin ) ? DotProduct( vecVelocity, m_vecAxis ) : 1.0f; |
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*/ |
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// We want the component of the velocity vector in the direction of the axis, which since the |
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// axis is normalized is simply their dot product (eg V . A = |V|*|A|*cos(theta) ) |
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m_fPrevVelocity = ( m_vecAxis != vec3_origin ) ? DotProduct( vecVelocity, m_vecAxis ) : 1.0f; |
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// if it's changed since the last frame, poke the output |
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if ( m_fPrevVelocity != m_Velocity.Get() ) |
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{ |
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m_Velocity.Set( m_fPrevVelocity, NULL, NULL ); |
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} |
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}
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