314 lines
9.7 KiB
C++
314 lines
9.7 KiB
C++
//========= Copyright Valve Corporation, All rights reserved. ============//
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//
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// Purpose:
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//
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// $NoKeywords: $
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//=============================================================================//
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#include "cbase.h"
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#include "c_ai_basenpc.h"
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#include "engine/ivmodelinfo.h"
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#include "rope_physics.h"
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#include "materialsystem/imaterialsystem.h"
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#include "fx_line.h"
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#include "engine/ivdebugoverlay.h"
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#include "bone_setup.h"
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#include "model_types.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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#define BARNACLE_TONGUE_POINTS 7
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//-----------------------------------------------------------------------------
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// Purpose:
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//-----------------------------------------------------------------------------
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class C_NPC_Barnacle : public C_AI_BaseNPC
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{
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public:
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DECLARE_CLASS( C_NPC_Barnacle, C_AI_BaseNPC );
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DECLARE_CLIENTCLASS();
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C_NPC_Barnacle( void );
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virtual void GetRenderBounds( Vector &theMins, Vector &theMaxs )
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{
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BaseClass::GetRenderBounds( theMins, theMaxs );
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// Extend our bounding box downwards the length of the tongue
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theMins -= Vector( 0, 0, m_flAltitude );
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}
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// Purpose: Initialize absmin & absmax to the appropriate box
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virtual void ComputeWorldSpaceSurroundingBox( Vector *pVecWorldMins, Vector *pVecWorldMaxs )
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{
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// Extend our bounding box downwards the length of the tongue
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CollisionProp()->WorldSpaceAABB( pVecWorldMins, pVecWorldMaxs );
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// We really care about the tongue tip. The altitude is not really relevant.
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VectorMin( *pVecWorldMins, m_vecTip, *pVecWorldMins );
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VectorMax( *pVecWorldMaxs, m_vecTip, *pVecWorldMaxs );
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// pVecWorldMins->z -= m_flAltitude;
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}
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void OnDataChanged( DataUpdateType_t updateType );
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void InitTonguePhysics( void );
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void ClientThink( void );
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void StandardBlendingRules( CStudioHdr *pStudioHdr, Vector pos[], Quaternion q[], float currentTime, int boneMask );
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void SetVecTip( const float *pPosition );
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void SetAltitude( float flAltitude );
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// Purpose:
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void ComputeVisualTipPoint( Vector *pTip );
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protected:
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Vector m_vecTipPrevious;
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Vector m_vecRoot;
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Vector m_vecTip;
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Vector m_vecTipDrawOffset;
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private:
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// Tongue points
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float m_flAltitude;
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Vector m_vecTonguePoints[BARNACLE_TONGUE_POINTS];
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CRopePhysics<BARNACLE_TONGUE_POINTS> m_TonguePhysics;
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// Tongue physics delegate
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class CBarnaclePhysicsDelegate : public CSimplePhysics::IHelper
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{
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public:
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virtual void GetNodeForces( CSimplePhysics::CNode *pNodes, int iNode, Vector *pAccel );
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virtual void ApplyConstraints( CSimplePhysics::CNode *pNodes, int nNodes );
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C_NPC_Barnacle *m_pBarnacle;
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};
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friend class CBarnaclePhysicsDelegate;
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CBarnaclePhysicsDelegate m_PhysicsDelegate;
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private:
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C_NPC_Barnacle( const C_NPC_Barnacle & ); // not defined, not accessible
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};
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static void RecvProxy_VecTip( const CRecvProxyData *pData, void *pStruct, void *pOut )
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{
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((C_NPC_Barnacle*)pStruct)->SetVecTip( pData->m_Value.m_Vector );
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}
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IMPLEMENT_CLIENTCLASS_DT( C_NPC_Barnacle, DT_Barnacle, CNPC_Barnacle )
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RecvPropFloat( RECVINFO( m_flAltitude ) ),
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RecvPropVector( RECVINFO( m_vecRoot ) ),
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RecvPropVector( RECVINFO( m_vecTip ), 0, RecvProxy_VecTip ),
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RecvPropVector( RECVINFO( m_vecTipDrawOffset ) ),
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END_RECV_TABLE()
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//-----------------------------------------------------------------------------
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// Purpose:
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//-----------------------------------------------------------------------------
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C_NPC_Barnacle::C_NPC_Barnacle( void )
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{
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m_PhysicsDelegate.m_pBarnacle = this;
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}
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//-----------------------------------------------------------------------------
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// Purpose:
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//-----------------------------------------------------------------------------
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void C_NPC_Barnacle::OnDataChanged( DataUpdateType_t updateType )
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{
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BaseClass::OnDataChanged( updateType );
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if ( updateType == DATA_UPDATE_CREATED )
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{
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InitTonguePhysics();
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// We want to think every frame.
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SetNextClientThink( CLIENT_THINK_ALWAYS );
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return;
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}
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}
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//-----------------------------------------------------------------------------
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// Sets the tongue altitude
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//-----------------------------------------------------------------------------
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void C_NPC_Barnacle::SetAltitude( float flAltitude )
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{
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m_flAltitude = flAltitude;
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}
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void C_NPC_Barnacle::SetVecTip( const float *pPosition )
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{
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Vector vecNewTip;
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vecNewTip.Init( pPosition[0], pPosition[1], pPosition[2] );
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if ( vecNewTip != m_vecTip )
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{
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m_vecTip = vecNewTip;
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CollisionProp()->MarkSurroundingBoundsDirty();
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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 C_NPC_Barnacle::InitTonguePhysics( void )
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{
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// Init tongue spline
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// First point is at the top
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m_TonguePhysics.SetupSimulation( m_flAltitude / (BARNACLE_TONGUE_POINTS-1), &m_PhysicsDelegate );
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m_TonguePhysics.Restart();
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// Initialize the positions of the nodes.
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m_TonguePhysics.GetFirstNode()->m_vPos = m_vecRoot;
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m_TonguePhysics.GetFirstNode()->m_vPrevPos = m_TonguePhysics.GetFirstNode()->m_vPos;
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float flAltitude = m_flAltitude;
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for( int i = 1; i < m_TonguePhysics.NumNodes(); i++ )
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{
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flAltitude *= 0.5;
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CSimplePhysics::CNode *pNode = m_TonguePhysics.GetNode( i );
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pNode->m_vPos = m_TonguePhysics.GetNode(i-1)->m_vPos - Vector(0,0,flAltitude);
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pNode->m_vPrevPos = pNode->m_vPos;
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// Set the length of the node's spring
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//m_TonguePhysics.ResetNodeSpringLength( i-1, flAltitude );
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}
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m_vecTipPrevious = m_vecTip;
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}
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//-----------------------------------------------------------------------------
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// Purpose:
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//-----------------------------------------------------------------------------
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void C_NPC_Barnacle::ClientThink( void )
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{
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m_TonguePhysics.Simulate( gpGlobals->frametime );
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// Set the spring's length to that of the tongue's extension
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m_TonguePhysics.ResetSpringLength( m_flAltitude / (BARNACLE_TONGUE_POINTS-1) );
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// Necessary because ComputeVisualTipPoint depends on m_vecTipPrevious
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Vector vecTemp;
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ComputeVisualTipPoint( &vecTemp );
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m_vecTipPrevious = vecTemp;
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}
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//-----------------------------------------------------------------------------
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// Purpose:
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//-----------------------------------------------------------------------------
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void C_NPC_Barnacle::StandardBlendingRules( CStudioHdr *hdr, Vector pos[], Quaternion q[], float currentTime, int boneMask )
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{
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BaseClass::StandardBlendingRules( hdr, pos, q, currentTime, boneMask );
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if ( !hdr )
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return;
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int firstBone = Studio_BoneIndexByName( hdr, "Barnacle.tongue1" );
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Vector vecPrevRight;
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GetVectors( NULL, &vecPrevRight, NULL );
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Vector vecPrev = pos[Studio_BoneIndexByName( hdr, "Barnacle.base" )];
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Vector vecCurr = vec3_origin;
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Vector vecForward;
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for ( int i = 0; i <= BARNACLE_TONGUE_POINTS; i++ )
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{
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// We double up the bones at the last node.
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if ( i == BARNACLE_TONGUE_POINTS )
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{
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vecCurr = m_TonguePhysics.GetLastNode()->m_vPos;
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}
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else
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{
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vecCurr = m_TonguePhysics.GetNode(i)->m_vPos;
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}
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//debugoverlay->AddBoxOverlay( vecCurr, -Vector(2,2,2), Vector(2,2,2), vec3_angle, 0,255,0, 128, 0.1 );
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// Fill out the positions in local space
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VectorITransform( vecCurr, EntityToWorldTransform(), pos[firstBone+i] );
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vecCurr = pos[firstBone+i];
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// Disallow twist in the tongue visually
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// Forward vector has to follow the tongue, right + up have to minimize twist from
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// the previous bone
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// Fill out the angles
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if ( i != BARNACLE_TONGUE_POINTS )
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{
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vecForward = (vecCurr - vecPrev);
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if ( VectorNormalize( vecForward ) < 1e-3 )
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{
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vecForward.Init( 0, 0, 1 );
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}
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}
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// Project the previous vecRight into a plane perpendicular to vecForward
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// that's the vector closest to what we want...
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Vector vecRight, vecUp;
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VectorMA( vecPrevRight, -DotProduct( vecPrevRight, vecForward ), vecForward, vecRight );
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VectorNormalize( vecRight );
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CrossProduct( vecForward, vecRight, vecUp );
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BasisToQuaternion( vecForward, vecRight, vecUp, q[firstBone+i] );
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vecPrev = vecCurr;
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vecPrevRight = vecRight;
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}
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}
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//===============================================================================================================================
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// BARNACLE TONGUE PHYSICS
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//===============================================================================================================================
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#define TONGUE_GRAVITY 0, 0, -1000
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//-----------------------------------------------------------------------------
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// Purpose:
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//-----------------------------------------------------------------------------
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void C_NPC_Barnacle::CBarnaclePhysicsDelegate::GetNodeForces( CSimplePhysics::CNode *pNodes, int iNode, Vector *pAccel )
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{
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// Gravity.
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pAccel->Init( TONGUE_GRAVITY );
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}
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//-----------------------------------------------------------------------------
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// Purpose:
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//-----------------------------------------------------------------------------
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#define TIP_SNAP_FACTOR 200
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// Todo: this really ought to be SIMD.
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void C_NPC_Barnacle::ComputeVisualTipPoint( Vector *pTip )
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{
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float flTipMove = TIP_SNAP_FACTOR * gpGlobals->frametime;
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Vector tipIdeal;
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VectorAdd(m_vecTip, m_vecTipDrawOffset, tipIdeal);
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if ( tipIdeal.DistToSqr( m_vecTipPrevious ) > (flTipMove * flTipMove) )
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{
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// Inch the visual tip toward the actual tip
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VectorSubtract( tipIdeal, m_vecTipPrevious, *pTip );
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VectorNormalize( *pTip );
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*pTip *= flTipMove;
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*pTip += m_vecTipPrevious;
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}
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else
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{
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*pTip = tipIdeal;
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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 C_NPC_Barnacle::CBarnaclePhysicsDelegate::ApplyConstraints( CSimplePhysics::CNode *pNodes, int nNodes )
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{
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// Startpoint always stays at the root
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pNodes[0].m_vPos = m_pBarnacle->m_vecRoot;
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// Endpoint always stays at the tip
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m_pBarnacle->ComputeVisualTipPoint( &pNodes[nNodes-1].m_vPos );
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}
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