1 files changed, 151 insertions, 0 deletions
diff --git a/indra/llcharacter/lltargetingmotion.cpp b/indra/llcharacter/lltargetingmotion.cpp
new file mode 100644
index 0000000000..0f3eaa855b
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+++ b/indra/llcharacter/lltargetingmotion.cpp
@@ -0,0 +1,151 @@
+/** 
+ * @file lltargetingmotion.cpp
+ * @brief Implementation of LLTargetingMotion class.
+ *
+ * Copyright (c) 2001-$CurrentYear$, Linden Research, Inc.
+ * $License$
+ */
+
+//-----------------------------------------------------------------------------
+// Header Files
+//-----------------------------------------------------------------------------
+#include "linden_common.h"
+
+#include "lltargetingmotion.h"
+#include "llcharacter.h"
+#include "v3dmath.h"
+#include "llcriticaldamp.h"
+
+//-----------------------------------------------------------------------------
+// Constants
+//-----------------------------------------------------------------------------
+const F32 TORSO_TARGET_HALF_LIFE = 0.25f;
+const F32 MAX_TIME_DELTA = 2.f; //max two seconds a frame for calculating interpolation
+const F32 TARGET_PLANE_THRESHOLD_DOT = 0.6f;
+const F32 TORSO_ROT_FRACTION = 0.5f;
+
+//-----------------------------------------------------------------------------
+// LLTargetingMotion()
+// Class Constructor
+//-----------------------------------------------------------------------------
+LLTargetingMotion::LLTargetingMotion(const LLUUID &id) : LLMotion(id)
+{
+	mCharacter = NULL;
+	mName = "targeting";
+}
+
+
+//-----------------------------------------------------------------------------
+// ~LLTargetingMotion()
+// Class Destructor
+//-----------------------------------------------------------------------------
+LLTargetingMotion::~LLTargetingMotion()
+{
+}
+
+//-----------------------------------------------------------------------------
+// LLTargetingMotion::onInitialize(LLCharacter *character)
+//-----------------------------------------------------------------------------
+LLMotion::LLMotionInitStatus LLTargetingMotion::onInitialize(LLCharacter *character)
+{
+	// save character for future use
+	mCharacter = character;
+
+	mPelvisJoint = mCharacter->getJoint("mPelvis");
+	mTorsoJoint = mCharacter->getJoint("mTorso");
+	mRightHandJoint = mCharacter->getJoint("mWristRight");
+
+	// make sure character skeleton is copacetic
+	if (!mPelvisJoint ||
+		!mTorsoJoint ||
+		!mRightHandJoint)
+	{
+		llwarns << "Invalid skeleton for targeting motion!" << llendl;
+		return STATUS_FAILURE;
+	}
+
+	mTorsoState.setJoint( mTorsoJoint );
+
+	// add joint states to the pose
+	mTorsoState.setUsage(LLJointState::ROT);
+	addJointState( &mTorsoState );
+
+	return STATUS_SUCCESS;
+}
+
+//-----------------------------------------------------------------------------
+// LLTargetingMotion::onActivate()
+//-----------------------------------------------------------------------------
+BOOL LLTargetingMotion::onActivate()
+{
+	return TRUE;
+}
+
+//-----------------------------------------------------------------------------
+// LLTargetingMotion::onUpdate()
+//-----------------------------------------------------------------------------
+BOOL LLTargetingMotion::onUpdate(F32 time, U8* joint_mask)
+{
+	F32 slerp_amt = LLCriticalDamp::getInterpolant(TORSO_TARGET_HALF_LIFE);
+
+	LLVector3 target;
+	LLVector3* lookAtPoint = (LLVector3*)mCharacter->getAnimationData("LookAtPoint");
+
+	BOOL result = TRUE;
+
+	if (!lookAtPoint)
+	{
+		return TRUE;
+	}
+	else
+	{
+		target = *lookAtPoint;
+		target.normVec();
+	}
+	
+	//LLVector3 target_plane_normal = LLVector3(1.f, 0.f, 0.f) * mPelvisJoint->getWorldRotation();
+	//LLVector3 torso_dir = LLVector3(1.f, 0.f, 0.f) * (mTorsoJoint->getWorldRotation() * mTorsoState.getRotation());
+
+	LLVector3 skyward(0.f, 0.f, 1.f);
+	LLVector3 left(skyward % target);
+	left.normVec();
+	LLVector3 up(target % left);
+	up.normVec();
+	LLQuaternion target_aim_rot(target, left, up);
+
+	LLQuaternion cur_torso_rot = mTorsoJoint->getWorldRotation();
+
+	LLVector3 right_hand_at = LLVector3(0.f, -1.f, 0.f) * mRightHandJoint->getWorldRotation();
+	left.setVec(skyward % right_hand_at);
+	left.normVec();
+	up.setVec(right_hand_at % left);
+	up.normVec();
+	LLQuaternion right_hand_rot(right_hand_at, left, up);
+
+	LLQuaternion new_torso_rot = (cur_torso_rot * ~right_hand_rot) * target_aim_rot;
+
+	// find ideal additive rotation to make torso point in correct direction
+	new_torso_rot = new_torso_rot * ~cur_torso_rot;
+
+	// slerp from current additive rotation to ideal additive rotation
+	new_torso_rot = nlerp(slerp_amt, mTorsoState.getRotation(), new_torso_rot);
+
+	// constraint overall torso rotation
+	LLQuaternion total_rot = new_torso_rot * mTorsoJoint->getRotation();
+	total_rot.constrain(F_PI_BY_TWO * 0.8f);
+	new_torso_rot = total_rot * ~mTorsoJoint->getRotation();
+
+	mTorsoState.setRotation(new_torso_rot);
+
+	return result;
+}
+
+//-----------------------------------------------------------------------------
+// LLTargetingMotion::onDeactivate()
+//-----------------------------------------------------------------------------
+void LLTargetingMotion::onDeactivate()
+{
+}
+
+
+// End