1 files changed, 123 insertions, 0 deletions
diff --git a/indra/llcharacter/llkeyframefallmotion.cpp b/indra/llcharacter/llkeyframefallmotion.cpp
new file mode 100644
index 0000000000..248d22c22c
--- /dev/null
+++ b/indra/llcharacter/llkeyframefallmotion.cpp
@@ -0,0 +1,123 @@
+/** 
+ * @file llkeyframefallmotion.cpp
+ * @brief Implementation of LLKeyframeFallMotion class.
+ *
+ * Copyright (c) 2001-$CurrentYear$, Linden Research, Inc.
+ * $License$
+ */
+
+//-----------------------------------------------------------------------------
+// Header Files
+//-----------------------------------------------------------------------------
+#include "linden_common.h"
+
+#include "llkeyframefallmotion.h"
+#include "llcharacter.h"
+#include "m3math.h"
+
+//-----------------------------------------------------------------------------
+// Macros
+//-----------------------------------------------------------------------------
+#define GO_TO_KEY_POSE	1
+#define MIN_TRACK_SPEED 0.01f
+
+//-----------------------------------------------------------------------------
+// LLKeyframeFallMotion()
+// Class Constructor
+//-----------------------------------------------------------------------------
+LLKeyframeFallMotion::LLKeyframeFallMotion(const LLUUID &id) : LLKeyframeMotion(id)
+{
+	mVelocityZ = 0.f;
+	mCharacter = NULL;
+}
+
+
+//-----------------------------------------------------------------------------
+// ~LLKeyframeFallMotion()
+// Class Destructor
+//-----------------------------------------------------------------------------
+LLKeyframeFallMotion::~LLKeyframeFallMotion()
+{
+}
+
+
+//-----------------------------------------------------------------------------
+// LLKeyframeFallMotion::onInitialize()
+//-----------------------------------------------------------------------------
+LLMotion::LLMotionInitStatus LLKeyframeFallMotion::onInitialize(LLCharacter *character)
+{
+	// save character pointer for later use
+	mCharacter = character;
+
+	// load keyframe data, setup pose and joint states
+	LLMotion::LLMotionInitStatus result = LLKeyframeMotion::onInitialize(character);
+
+	for (U32 jm=0; jm<mJointMotionList->mNumJointMotions; jm++)
+	{
+		if (!mJointStates[jm].getJoint())
+			continue;
+		if (mJointStates[jm].getJoint()->getName() == std::string("mPelvis"))
+		{
+			mPelvisStatep = &mJointStates[jm];
+		}
+	}
+
+	return result;
+}
+
+//-----------------------------------------------------------------------------
+// LLKeyframeFallMotion::onActivate()
+//-----------------------------------------------------------------------------
+BOOL LLKeyframeFallMotion::onActivate()
+{
+	LLVector3 ground_pos;
+	LLVector3 ground_normal;
+	LLQuaternion inverse_pelvis_rot;
+	LLVector3 fwd_axis(1.f, 0.f, 0.f);
+
+	mVelocityZ = -mCharacter->getCharacterVelocity().mV[VZ];
+	mCharacter->getGround( mCharacter->getCharacterPosition(), ground_pos, ground_normal);
+	ground_normal.normVec();
+
+	inverse_pelvis_rot = mCharacter->getCharacterRotation();
+	inverse_pelvis_rot.transQuat();
+
+	// find ground normal in pelvis space
+	ground_normal = ground_normal * inverse_pelvis_rot;
+
+	// calculate new foward axis
+	fwd_axis = fwd_axis - (ground_normal * (ground_normal * fwd_axis));
+	fwd_axis.normVec();
+	mRotationToGroundNormal = LLQuaternion(fwd_axis, ground_normal % fwd_axis, ground_normal);
+
+	return LLKeyframeMotion::onActivate();
+}
+
+//-----------------------------------------------------------------------------
+// LLKeyframeFallMotion::onUpdate()
+//-----------------------------------------------------------------------------
+BOOL LLKeyframeFallMotion::onUpdate(F32 activeTime, U8* joint_mask)
+{
+	BOOL result = LLKeyframeMotion::onUpdate(activeTime, joint_mask);
+	F32  slerp_amt = clamp_rescale(activeTime / getDuration(), 0.5f, 0.75f, 0.f, 1.f);
+
+	mPelvisStatep->setRotation(mPelvisStatep->getRotation() * slerp(slerp_amt, mRotationToGroundNormal, LLQuaternion()));
+
+	return result;
+}
+
+//-----------------------------------------------------------------------------
+// LLKeyframeFallMotion::getEaseInDuration()
+//-----------------------------------------------------------------------------
+F32 LLKeyframeFallMotion::getEaseInDuration()
+{
+	if (mVelocityZ == 0.f)
+	{
+		// we've already hit the ground
+		return 0.4f;
+	}
+
+	return mCharacter->getPreferredPelvisHeight() / mVelocityZ;
+}
+
+// End