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Modified source engine (2017) developed by valve and leaked in 2020. Not for commercial purporses
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source-engine/public/jigglebones.cpp

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//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose:
//
// $NoKeywords: $
//===========================================================================//
#include "tier1/convar.h"
#include "jigglebones.h"
#ifdef CLIENT_DLL
#include "engine/ivdebugoverlay.h"
#include "cdll_client_int.h"
#endif // CLIENT_DLL
// memdbgon must be the last include file in a .cpp file!!!
#include "tier0/memdbgon.h"
#ifdef CLIENT_DLL
//-----------------------------------------------------------------------------
ConVar cl_jiggle_bone_debug( "cl_jiggle_bone_debug", "0", FCVAR_CHEAT, "Display physics-based 'jiggle bone' debugging information" );
ConVar cl_jiggle_bone_debug_yaw_constraints( "cl_jiggle_bone_debug_yaw_constraints", "0", FCVAR_CHEAT, "Display physics-based 'jiggle bone' debugging information" );
ConVar cl_jiggle_bone_debug_pitch_constraints( "cl_jiggle_bone_debug_pitch_constraints", "0", FCVAR_CHEAT, "Display physics-based 'jiggle bone' debugging information" );
#endif // CLIENT_DLL
ConVar cl_jiggle_bone_framerate_cutoff( "cl_jiggle_bone_framerate_cutoff", "20", 0, "Skip jiggle bone simulation if framerate drops below this value (frames/second)" );
//-----------------------------------------------------------------------------
JiggleData * CJiggleBones::GetJiggleData( int bone, float currenttime, const Vector &initBasePos, const Vector &initTipPos )
{
FOR_EACH_LL( m_jiggleBoneState, it )
{
if ( m_jiggleBoneState[it].bone == bone )
{
return &m_jiggleBoneState[it];
}
}
JiggleData data;
data.Init( bone, currenttime, initBasePos, initTipPos );
// Start out using jiggle bones for at least 16 frames.
data.useGoalMatrixCount = 0;
data.useJiggleBoneCount = 16;
int idx = m_jiggleBoneState.AddToHead( data );
if ( idx == m_jiggleBoneState.InvalidIndex() )
return NULL;
return &m_jiggleBoneState[idx];
}
//-----------------------------------------------------------------------------
/**
* Do spring physics calculations and update "jiggle bone" matrix
* (Michael Booth, Turtle Rock Studios)
*/
void CJiggleBones::BuildJiggleTransformations( int boneIndex, float currenttime, const mstudiojigglebone_t *jiggleInfo, const matrix3x4_t &goalMX, matrix3x4_t &boneMX )
{
Vector goalBasePosition;
MatrixPosition( goalMX, goalBasePosition );
Vector goalForward, goalUp, goalLeft;
MatrixGetColumn( goalMX, 0, goalLeft );
MatrixGetColumn( goalMX, 1, goalUp );
MatrixGetColumn( goalMX, 2, goalForward );
// compute goal tip position
Vector goalTip = goalBasePosition + jiggleInfo->length * goalForward;
JiggleData *data = GetJiggleData( boneIndex, currenttime, goalBasePosition, goalTip );
if ( !data )
{
return;
}
// if frames have been skipped since our last update, we were likely
// disabled and re-enabled, so re-init
#if defined(CLIENT_DLL) || defined(GAME_DLL)
float timeTolerance = 1.2f * gpGlobals->frametime;
#else
float timeTolerance = 0.5f;
#endif
if ( currenttime - data->lastUpdate > timeTolerance )
{
data->Init( boneIndex, currenttime, goalBasePosition, goalTip );
}
if ( data->lastLeft.IsZero() )
{
data->lastLeft = goalLeft;
}
// limit maximum deltaT to avoid simulation blowups
// if framerate is too low, skip jigglebones altogether, since movement will be too
// large between frames to simulate with a simple Euler integration
float deltaT = currenttime - data->lastUpdate;
const float thousandHZ = 0.001f;
bool bMaxDeltaT = deltaT < thousandHZ;
bool bUseGoalMatrix = cl_jiggle_bone_framerate_cutoff.GetFloat() <= 0.0f || deltaT > ( 1.0f / cl_jiggle_bone_framerate_cutoff.GetFloat() );
if ( bUseGoalMatrix )
{
// We hit the jiggle bone framerate cutoff. Reset the useGoalMatrixCount so we
// use the goal matrix at least 32 frames and don't flash back and forth.
data->useGoalMatrixCount = 32;
}
else if ( data->useGoalMatrixCount > 0 )
{
// Below the cutoff, but still need to use the goal matrix a few more times.
bUseGoalMatrix = true;
data->useGoalMatrixCount--;
}
else
{
// Use real jiggle bones. Woot!
data->useJiggleBoneCount = 32;
}
if ( data->useJiggleBoneCount > 0 )
{
// Make sure we draw at least runs of 32 frames with real jiggle bones.
data->useJiggleBoneCount--;
data->useGoalMatrixCount = 0;
bUseGoalMatrix = false;
}
if ( bMaxDeltaT )
{
deltaT = thousandHZ;
}
else if ( bUseGoalMatrix )
{
// disable jigglebone - just use goal matrix
boneMX = goalMX;
return;
}
// we want lastUpdate here, so if jigglebones were skipped they get reinitialized if they turn back on
data->lastUpdate = currenttime;
//
// Bone tip flex
//
if ( jiggleInfo->flags & ( JIGGLE_IS_FLEXIBLE | JIGGLE_IS_RIGID ) )
{
// apply gravity in global space
data->tipAccel.z -= jiggleInfo->tipMass;
if ( jiggleInfo->flags & JIGGLE_IS_FLEXIBLE )
{
// decompose into local coordinates
Vector error = goalTip - data->tipPos;
Vector localError;
localError.x = DotProduct( goalLeft, error );
localError.y = DotProduct( goalUp, error );
localError.z = DotProduct( goalForward, error );
Vector localVel;
localVel.x = DotProduct( goalLeft, data->tipVel );
localVel.y = DotProduct( goalUp, data->tipVel );
// yaw spring
float yawAccel = jiggleInfo->yawStiffness * localError.x - jiggleInfo->yawDamping * localVel.x;
// pitch spring
float pitchAccel = jiggleInfo->pitchStiffness * localError.y - jiggleInfo->pitchDamping * localVel.y;
if ( jiggleInfo->flags & JIGGLE_HAS_LENGTH_CONSTRAINT )
{
// drive tip towards goal tip position
data->tipAccel += yawAccel * goalLeft + pitchAccel * goalUp;
}
else
{
// allow flex along length of spring
localVel.z = DotProduct( goalForward, data->tipVel );
// along spring
float alongAccel = jiggleInfo->alongStiffness * localError.z - jiggleInfo->alongDamping * localVel.z;
// drive tip towards goal tip position
data->tipAccel += yawAccel * goalLeft + pitchAccel * goalUp + alongAccel * goalForward;
}
}
// simple euler integration
data->tipVel += data->tipAccel * deltaT;
data->tipPos += data->tipVel * deltaT;
// clear this timestep's accumulated accelerations
data->tipAccel = vec3_origin;
//
// Apply optional constraints
//
if ( jiggleInfo->flags & ( JIGGLE_HAS_YAW_CONSTRAINT | JIGGLE_HAS_PITCH_CONSTRAINT ) )
{
// find components of spring vector in local coordinate system
Vector along = data->tipPos - goalBasePosition;
Vector localAlong;
localAlong.x = DotProduct( goalLeft, along );
localAlong.y = DotProduct( goalUp, along );
localAlong.z = DotProduct( goalForward, along );
Vector localVel;
localVel.x = DotProduct( goalLeft, data->tipVel );
localVel.y = DotProduct( goalUp, data->tipVel );
localVel.z = DotProduct( goalForward, data->tipVel );
if ( jiggleInfo->flags & JIGGLE_HAS_YAW_CONSTRAINT )
{
// enforce yaw constraints in local XZ plane
float yawError = atan2( localAlong.x, localAlong.z );
bool isAtLimit = false;
float yaw = 0.0f;
if ( yawError < jiggleInfo->minYaw )
{
// at angular limit
isAtLimit = true;
yaw = jiggleInfo->minYaw;
}
else if ( yawError > jiggleInfo->maxYaw )
{
// at angular limit
isAtLimit = true;
yaw = jiggleInfo->maxYaw;
}
if ( isAtLimit )
{
float sy, cy;
SinCos( yaw, &sy, &cy );
// yaw matrix
matrix3x4_t yawMatrix;
yawMatrix[0][0] = cy;
yawMatrix[1][0] = 0;
yawMatrix[2][0] = -sy;
yawMatrix[0][1] = 0;
yawMatrix[1][1] = 1.0f;
yawMatrix[2][1] = 0;
yawMatrix[0][2] = sy;
yawMatrix[1][2] = 0;
yawMatrix[2][2] = cy;
yawMatrix[0][3] = 0;
yawMatrix[1][3] = 0;
yawMatrix[2][3] = 0;
// global coordinates of limit
matrix3x4_t limitMatrix;
ConcatTransforms( goalMX, yawMatrix, limitMatrix );
Vector limitLeft( limitMatrix.m_flMatVal[0][0],
limitMatrix.m_flMatVal[1][0],
limitMatrix.m_flMatVal[2][0] );
Vector limitUp( limitMatrix.m_flMatVal[0][1],
limitMatrix.m_flMatVal[1][1],
limitMatrix.m_flMatVal[2][1] );
Vector limitForward( limitMatrix.m_flMatVal[0][2],
limitMatrix.m_flMatVal[1][2],
limitMatrix.m_flMatVal[2][2] );
#ifdef CLIENT_DLL
if ( cl_jiggle_bone_debug_yaw_constraints.GetBool() )
{
float dT = 0.01f;
const float axisSize = 10.0f;
if ( debugoverlay )
{
debugoverlay->AddLineOverlay( goalBasePosition, goalBasePosition + axisSize * limitLeft, 0, 255, 255, true, dT );
debugoverlay->AddLineOverlay( goalBasePosition, goalBasePosition + axisSize * limitUp, 255, 255, 0, true, dT );
debugoverlay->AddLineOverlay( goalBasePosition, goalBasePosition + axisSize * limitForward, 255, 0, 255, true, dT );
}
}
#endif // CLIENT_DLL
Vector limitAlong( DotProduct( limitLeft, along ),
DotProduct( limitUp, along ),
DotProduct( limitForward, along ) );
// clip to limit plane
data->tipPos = goalBasePosition + limitAlong.y * limitUp + limitAlong.z * limitForward;
// removed friction and velocity clipping against constraint - was causing simulation blowups (MSB 12/9/2010)
data->tipVel.Zero();
// update along vectors for use by pitch constraint
along = data->tipPos - goalBasePosition;
localAlong.x = DotProduct( goalLeft, along );
localAlong.y = DotProduct( goalUp, along );
localAlong.z = DotProduct( goalForward, along );
localVel.x = DotProduct( goalLeft, data->tipVel );
localVel.y = DotProduct( goalUp, data->tipVel );
localVel.z = DotProduct( goalForward, data->tipVel );
}
}
if ( jiggleInfo->flags & JIGGLE_HAS_PITCH_CONSTRAINT )
{
// enforce pitch constraints in local YZ plane
float pitchError = atan2( localAlong.y, localAlong.z );
bool isAtLimit = false;
float pitch = 0.0f;
if ( pitchError < jiggleInfo->minPitch )
{
// at angular limit
isAtLimit = true;
pitch = jiggleInfo->minPitch;
}
else if ( pitchError > jiggleInfo->maxPitch )
{
// at angular limit
isAtLimit = true;
pitch = jiggleInfo->maxPitch;
}
if ( isAtLimit )
{
float sp, cp;
SinCos( pitch, &sp, &cp );
// pitch matrix
matrix3x4_t pitchMatrix;
pitchMatrix[0][0] = 1.0f;
pitchMatrix[1][0] = 0;
pitchMatrix[2][0] = 0;
pitchMatrix[0][1] = 0;
pitchMatrix[1][1] = cp;
pitchMatrix[2][1] = -sp;
pitchMatrix[0][2] = 0;
pitchMatrix[1][2] = sp;
pitchMatrix[2][2] = cp;
pitchMatrix[0][3] = 0;
pitchMatrix[1][3] = 0;
pitchMatrix[2][3] = 0;
// global coordinates of limit
matrix3x4_t limitMatrix;
ConcatTransforms( goalMX, pitchMatrix, limitMatrix );
Vector limitLeft( limitMatrix.m_flMatVal[0][0],
limitMatrix.m_flMatVal[1][0],
limitMatrix.m_flMatVal[2][0] );
Vector limitUp( limitMatrix.m_flMatVal[0][1],
limitMatrix.m_flMatVal[1][1],
limitMatrix.m_flMatVal[2][1] );
Vector limitForward( limitMatrix.m_flMatVal[0][2],
limitMatrix.m_flMatVal[1][2],
limitMatrix.m_flMatVal[2][2] );
#ifdef CLIENT_DLL
if (cl_jiggle_bone_debug_pitch_constraints.GetBool())
{
float dT = 0.01f;
const float axisSize = 10.0f;
if ( debugoverlay )
{
debugoverlay->AddLineOverlay( goalBasePosition, goalBasePosition + axisSize * limitLeft, 0, 255, 255, true, dT );
debugoverlay->AddLineOverlay( goalBasePosition, goalBasePosition + axisSize * limitUp, 255, 255, 0, true, dT );
debugoverlay->AddLineOverlay( goalBasePosition, goalBasePosition + axisSize * limitForward, 255, 0, 255, true, dT );
}
}
#endif // CLIENT_DLL
Vector limitAlong( DotProduct( limitLeft, along ),
DotProduct( limitUp, along ),
DotProduct( limitForward, along ) );
// clip to limit plane
data->tipPos = goalBasePosition + limitAlong.x * limitLeft + limitAlong.z * limitForward;
// removed friction and velocity clipping against constraint - was causing simulation blowups (MSB 12/9/2010)
data->tipVel.Zero();
}
}
}
// needed for matrix assembly below
Vector forward = data->tipPos - goalBasePosition;
forward.NormalizeInPlace();
if ( jiggleInfo->flags & JIGGLE_HAS_ANGLE_CONSTRAINT )
{
// enforce max angular error
Vector error = goalTip - data->tipPos;
float dot = DotProduct( forward, goalForward );
float angleBetween = acos( dot );
if ( dot < 0.0f )
{
angleBetween = 2.0f * M_PI - angleBetween;
}
if ( angleBetween > jiggleInfo->angleLimit )
{
// at angular limit
float maxBetween = jiggleInfo->length * sin( jiggleInfo->angleLimit );
Vector delta = goalTip - data->tipPos;
delta.NormalizeInPlace();
data->tipPos = goalTip - maxBetween * delta;
forward = data->tipPos - goalBasePosition;
forward.NormalizeInPlace();
}
}
if ( jiggleInfo->flags & JIGGLE_HAS_LENGTH_CONSTRAINT )
{
// enforce spring length
data->tipPos = goalBasePosition + jiggleInfo->length * forward;
// zero velocity along forward bone axis
data->tipVel -= DotProduct( data->tipVel, forward ) * forward;
}
//
// Build bone matrix to align along current tip direction
//
Vector left = CrossProduct( goalUp, forward );
left.NormalizeInPlace();
if ( DotProduct( left, data->lastLeft ) < 0.0f )
{
// The bone has rotated so far its on the other side of the up vector
// resulting in the cross product result flipping 180 degrees around the up
// vector. Flip it back.
left = -left;
}
data->lastLeft = left;
#ifdef CLIENT_DLL
if ( cl_jiggle_bone_debug.GetBool() )
{
if ( debugoverlay )
{
debugoverlay->AddLineOverlay( goalBasePosition, goalBasePosition + 10.0f * data->lastLeft, 255, 0, 255, true, 0.01f );
}
}
#endif
Vector up = CrossProduct( forward, left );
boneMX[0][0] = left.x;
boneMX[1][0] = left.y;
boneMX[2][0] = left.z;
boneMX[0][1] = up.x;
boneMX[1][1] = up.y;
boneMX[2][1] = up.z;
boneMX[0][2] = forward.x;
boneMX[1][2] = forward.y;
boneMX[2][2] = forward.z;
boneMX[0][3] = goalBasePosition.x;
boneMX[1][3] = goalBasePosition.y;
boneMX[2][3] = goalBasePosition.z;
}
//
// Bone base flex
//
if ( jiggleInfo->flags & JIGGLE_HAS_BASE_SPRING )
{
// gravity
data->baseAccel.z -= jiggleInfo->baseMass;
// simple spring
Vector error = goalBasePosition - data->basePos;
data->baseAccel += jiggleInfo->baseStiffness * error - jiggleInfo->baseDamping * data->baseVel;
data->baseVel += data->baseAccel * deltaT;
data->basePos += data->baseVel * deltaT;
// clear this timestep's accumulated accelerations
data->baseAccel = vec3_origin;
// constrain to limits
error = data->basePos - goalBasePosition;
Vector localError;
localError.x = DotProduct( goalLeft, error );
localError.y = DotProduct( goalUp, error );
localError.z = DotProduct( goalForward, error );
Vector localVel;
localVel.x = DotProduct( goalLeft, data->baseVel );
localVel.y = DotProduct( goalUp, data->baseVel );
localVel.z = DotProduct( goalForward, data->baseVel );
// horizontal constraint
if ( localError.x < jiggleInfo->baseMinLeft )
{
localError.x = jiggleInfo->baseMinLeft;
// friction
data->baseAccel -= jiggleInfo->baseLeftFriction * (localVel.y * goalUp + localVel.z * goalForward);
}
else if ( localError.x > jiggleInfo->baseMaxLeft )
{
localError.x = jiggleInfo->baseMaxLeft;
// friction
data->baseAccel -= jiggleInfo->baseLeftFriction * (localVel.y * goalUp + localVel.z * goalForward);
}
if ( localError.y < jiggleInfo->baseMinUp )
{
localError.y = jiggleInfo->baseMinUp;
// friction
data->baseAccel -= jiggleInfo->baseUpFriction * (localVel.x * goalLeft + localVel.z * goalForward);
}
else if ( localError.y > jiggleInfo->baseMaxUp )
{
localError.y = jiggleInfo->baseMaxUp;
// friction
data->baseAccel -= jiggleInfo->baseUpFriction * (localVel.x * goalLeft + localVel.z * goalForward);
}
if ( localError.z < jiggleInfo->baseMinForward )
{
localError.z = jiggleInfo->baseMinForward;
// friction
data->baseAccel -= jiggleInfo->baseForwardFriction * (localVel.x * goalLeft + localVel.y * goalUp);
}
else if ( localError.z > jiggleInfo->baseMaxForward )
{
localError.z = jiggleInfo->baseMaxForward;
// friction
data->baseAccel -= jiggleInfo->baseForwardFriction * (localVel.x * goalLeft + localVel.y * goalUp);
}
data->basePos = goalBasePosition + localError.x * goalLeft + localError.y * goalUp + localError.z * goalForward;
// fix up velocity
data->baseVel = (data->basePos - data->baseLastPos) / deltaT;
data->baseLastPos = data->basePos;
if ( !( jiggleInfo->flags & ( JIGGLE_IS_FLEXIBLE | JIGGLE_IS_RIGID ) ) )
{
// no tip flex - use bone's goal orientation
boneMX = goalMX;
}
// update bone position
MatrixSetColumn( data->basePos, 3, boneMX );
}
else if ( jiggleInfo->flags & JIGGLE_IS_BOING )
{
// estimate velocity
Vector vel = goalBasePosition - data->lastBoingPos;
#ifdef CLIENT_DLL
if ( cl_jiggle_bone_debug.GetBool() )
{
if ( debugoverlay )
{
debugoverlay->AddLineOverlay( data->lastBoingPos, goalBasePosition, 0, 128, ( gpGlobals->framecount & 0x1 ) ? 0 : 200, true, 999.9f );
}
}
#endif
data->lastBoingPos = goalBasePosition;
float speed = vel.NormalizeInPlace();
if ( speed < 0.00001f )
{
vel = Vector( 0, 0, 1.0f );
speed = 0.0f;
}
else
{
speed /= deltaT;
}
data->boingTime += deltaT;
// if velocity changed a lot, we impacted and should *boing*
const float minSpeed = 5.0f; // 15.0f;
const float minReBoingTime = 0.5f;
if ( ( speed > minSpeed || data->boingSpeed > minSpeed ) && data->boingTime > minReBoingTime )
{
if ( fabs( data->boingSpeed - speed ) > jiggleInfo->boingImpactSpeed || DotProduct( vel, data->boingVelDir ) < jiggleInfo->boingImpactAngle )
{
data->boingTime = 0.0f;
data->boingDir = -vel;
#ifdef CLIENT_DLL
if ( cl_jiggle_bone_debug.GetBool() )
{
if ( debugoverlay )
{
debugoverlay->AddLineOverlay( goalBasePosition, goalBasePosition + 5.0f * data->boingDir, 255, 255, 0, true, 999.9f );
debugoverlay->AddLineOverlay( goalBasePosition, goalBasePosition + Vector( 0.1, 0, 0 ), 128, 128, 0, true, 999.9f );
debugoverlay->AddLineOverlay( goalBasePosition, goalBasePosition + Vector( 0, 0.1, 0 ), 128, 128, 0, true, 999.9f );
debugoverlay->AddLineOverlay( goalBasePosition, goalBasePosition + Vector( 0, 0, 0.1 ), 128, 128, 0, true, 999.9f );
}
}
#endif
}
}
data->boingVelDir = vel;
data->boingSpeed = speed;
float damping = 1.0f - ( jiggleInfo->boingDampingRate * data->boingTime );
if ( damping < 0.01f )
{
// boing has entirely damped out
boneMX = goalMX;
}
else
{
damping *= damping;
damping *= damping;
float flex = jiggleInfo->boingAmplitude * cos( jiggleInfo->boingFrequency * data->boingTime ) * damping;
float squash = 1.0f + flex;
float stretch = 1.0f - flex;
boneMX[0][0] = goalLeft.x;
boneMX[1][0] = goalLeft.y;
boneMX[2][0] = goalLeft.z;
boneMX[0][1] = goalUp.x;
boneMX[1][1] = goalUp.y;
boneMX[2][1] = goalUp.z;
boneMX[0][2] = goalForward.x;
boneMX[1][2] = goalForward.y;
boneMX[2][2] = goalForward.z;
boneMX[0][3] = 0.0f;
boneMX[1][3] = 0.0f;
boneMX[2][3] = 0.0f;
// build transform into "boing space", where Z is along primary boing axis
Vector boingSide;
if ( fabs( data->boingDir.x ) < 0.9f )
{
boingSide = CrossProduct( data->boingDir, Vector( 1.0f, 0, 0 ) );
}
else
{
boingSide = CrossProduct( data->boingDir, Vector( 0, 0, 1.0f ) );
}
boingSide.NormalizeInPlace();
Vector boingOtherSide = CrossProduct( data->boingDir, boingSide );
matrix3x4_t xfrmToBoingCoordsMX;
xfrmToBoingCoordsMX[0][0] = boingSide.x;
xfrmToBoingCoordsMX[0][1] = boingSide.y;
xfrmToBoingCoordsMX[0][2] = boingSide.z;
xfrmToBoingCoordsMX[1][0] = boingOtherSide.x;
xfrmToBoingCoordsMX[1][1] = boingOtherSide.y;
xfrmToBoingCoordsMX[1][2] = boingOtherSide.z;
xfrmToBoingCoordsMX[2][0] = data->boingDir.x;
xfrmToBoingCoordsMX[2][1] = data->boingDir.y;
xfrmToBoingCoordsMX[2][2] = data->boingDir.z;
xfrmToBoingCoordsMX[0][3] = 0.0f;
xfrmToBoingCoordsMX[1][3] = 0.0f;
xfrmToBoingCoordsMX[2][3] = 0.0f;
// build squash and stretch transform in "boing space"
matrix3x4_t boingMX;
boingMX[0][0] = squash;
boingMX[1][0] = 0.0f;
boingMX[2][0] = 0.0f;
boingMX[0][1] = 0.0f;
boingMX[1][1] = squash;
boingMX[2][1] = 0.0f;
boingMX[0][2] = 0.0f;
boingMX[1][2] = 0.0f;
boingMX[2][2] = stretch;
boingMX[0][3] = 0.0f;
boingMX[1][3] = 0.0f;
boingMX[2][3] = 0.0f;
// transform back from boing space (inverse is transpose since orthogonal)
matrix3x4_t xfrmFromBoingCoordsMX;
xfrmFromBoingCoordsMX[0][0] = xfrmToBoingCoordsMX[0][0];
xfrmFromBoingCoordsMX[1][0] = xfrmToBoingCoordsMX[0][1];
xfrmFromBoingCoordsMX[2][0] = xfrmToBoingCoordsMX[0][2];
xfrmFromBoingCoordsMX[0][1] = xfrmToBoingCoordsMX[1][0];
xfrmFromBoingCoordsMX[1][1] = xfrmToBoingCoordsMX[1][1];
xfrmFromBoingCoordsMX[2][1] = xfrmToBoingCoordsMX[1][2];
xfrmFromBoingCoordsMX[0][2] = xfrmToBoingCoordsMX[2][0];
xfrmFromBoingCoordsMX[1][2] = xfrmToBoingCoordsMX[2][1];
xfrmFromBoingCoordsMX[2][2] = xfrmToBoingCoordsMX[2][2];
xfrmFromBoingCoordsMX[0][3] = 0.0f;
xfrmFromBoingCoordsMX[1][3] = 0.0f;
xfrmFromBoingCoordsMX[2][3] = 0.0f;
// put it all together
matrix3x4_t xfrmMX;
MatrixMultiply( xfrmToBoingCoordsMX, boingMX, xfrmMX );
MatrixMultiply( xfrmMX, xfrmFromBoingCoordsMX, xfrmMX );
MatrixMultiply( boneMX, xfrmMX, boneMX );
#ifdef CLIENT_DLL
if ( cl_jiggle_bone_debug.GetBool() )
{
float dT = 0.01f;
if ( debugoverlay )
{
debugoverlay->AddLineOverlay( goalBasePosition, goalBasePosition + 50.0f * data->boingDir, 255, 255, 0, true, dT );
debugoverlay->AddLineOverlay( goalBasePosition, goalBasePosition + 50.0f * boingSide, 255, 0, 255, true, dT );
debugoverlay->AddLineOverlay( goalBasePosition, goalBasePosition + 50.0f * boingOtherSide, 0, 255, 255, true, dT );
}
}
#endif
boneMX[0][3] = goalBasePosition.x;
boneMX[1][3] = goalBasePosition.y;
boneMX[2][3] = goalBasePosition.z;
}
}
else if ( !( jiggleInfo->flags & ( JIGGLE_IS_FLEXIBLE | JIGGLE_IS_RIGID ) ) )
{
// no flex at all - just use goal matrix
boneMX = goalMX;
}
#ifdef CLIENT_DLL
// debug display for client only so server doesn't try to also draw it
if ( cl_jiggle_bone_debug.GetBool() )
{
float dT = 0.01f;
const float axisSize = 5.0f;
if ( debugoverlay )
{
debugoverlay->AddLineOverlay( goalBasePosition, goalBasePosition + axisSize * goalLeft, 255, 0, 0, true, dT );
debugoverlay->AddLineOverlay( goalBasePosition, goalBasePosition + axisSize * goalUp, 0, 255, 0, true, dT );
debugoverlay->AddLineOverlay( goalBasePosition, goalBasePosition + axisSize * goalForward, 0, 0, 255, true, dT );
}
if ( cl_jiggle_bone_debug.GetInt() > 1 )
{
DevMsg( "Jiggle bone #%d, basePos( %3.2f, %3.2f, %3.2f ), tipPos( %3.2f, %3.2f, %3.2f ), left( %3.2f, %3.2f, %3.2f ), up( %3.2f, %3.2f, %3.2f ), forward( %3.2f, %3.2f, %3.2f )\n",
data->bone,
goalBasePosition.x, goalBasePosition.y, goalBasePosition.z,
data->tipPos.x, data->tipPos.y, data->tipPos.z,
goalLeft.x, goalLeft.y, goalLeft.z,
goalUp.x, goalUp.y, goalUp.z,
goalForward.x, goalForward.y, goalForward.z );
}
const float sz = 1.0f;
if ( jiggleInfo->flags & ( JIGGLE_IS_FLEXIBLE | JIGGLE_IS_RIGID ) )
{
if ( debugoverlay )
{
debugoverlay->AddLineOverlay( goalBasePosition,
data->tipPos, 255, 255, 0, true, dT );
debugoverlay->AddLineOverlay( data->tipPos + Vector( -sz, 0, 0 ),
data->tipPos + Vector( sz, 0, 0 ), 0, 255, 255, true, dT );
debugoverlay->AddLineOverlay( data->tipPos + Vector( 0, -sz, 0 ),
data->tipPos + Vector( 0, sz, 0 ), 0, 255, 255, true, dT );
debugoverlay->AddLineOverlay( data->tipPos + Vector( 0, 0, -sz ),
data->tipPos + Vector( 0, 0, sz ), 0, 255, 255, true, dT );
}
}
if ( jiggleInfo->flags & JIGGLE_HAS_BASE_SPRING )
{
if ( debugoverlay )
{
debugoverlay->AddLineOverlay( data->basePos + Vector( -sz, 0, 0 ),
data->basePos + Vector( sz, 0, 0 ), 255, 0, 255, true, dT );
debugoverlay->AddLineOverlay( data->basePos + Vector( 0, -sz, 0 ),
data->basePos + Vector( 0, sz, 0 ), 255, 0, 255, true, dT );
debugoverlay->AddLineOverlay( data->basePos + Vector( 0, 0, -sz ),
data->basePos + Vector( 0, 0, sz ), 255, 0, 255, true, dT );
}
}
if ( jiggleInfo->flags & JIGGLE_IS_BOING )
{
if ( cl_jiggle_bone_debug.GetInt() > 2 )
{
DevMsg( " boingSpeed = %3.2f, boingVelDir( %3.2f, %3.2f, %3.2f )\n", data->boingVelDir.Length() / deltaT, data->boingVelDir.x, data->boingVelDir.y, data->boingVelDir.z );
}
}
}
#endif // CLIENT_DLL
}