From ed6ecca2a45e52d9be1d91107b9643b5ecdfb8bf Mon Sep 17 00:00:00 2001
From: Leviathan Linden <leviathan@lindenlab.com>
Date: Thu, 16 Nov 2023 13:53:37 -0800
Subject: avatar_motion-->GameControl translation and flycam

---
 indra/newview/llflycam.cpp | 117 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 117 insertions(+)
 create mode 100644 indra/newview/llflycam.cpp

(limited to 'indra/newview/llflycam.cpp')

diff --git a/indra/newview/llflycam.cpp b/indra/newview/llflycam.cpp
new file mode 100644
index 0000000000..53b8388f98
--- /dev/null
+++ b/indra/newview/llflycam.cpp
@@ -0,0 +1,117 @@
+/**
+ * @file llflycam.cpp
+ * @brief LLFlycam class implementation
+ *
+ * $LicenseInfo:firstyear=2024&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2024, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#include "llflycam.h"
+
+LLFlycam::LLFlycam()
+{
+}
+
+
+void LLFlycam::setTransform(const LLVector3& position, const LLQuaternion& rotation)
+{
+    mPosition = position;
+    mRotation = rotation;
+    mRotation.normalize();
+}
+
+void LLFlycam::getTransform(LLVector3& position_out, LLQuaternion& rotation_out)
+{
+    position_out = mPosition;
+    rotation_out = mRotation;
+}
+
+
+void LLFlycam::setLinearVelocity(const LLVector3& velocity)
+{
+    // TODO: cap input
+    mLinearVelocity = velocity;
+}
+
+
+void LLFlycam::setPitchRate(F32 pitch_rate)
+{
+    // TODO: cap input
+    mPitchRate = pitch_rate;
+}
+
+
+void LLFlycam::setYawRate(F32 yaw_rate)
+{
+    // TODO: cap input
+    mYawRate = yaw_rate;
+}
+
+
+void LLFlycam::integrate(F32 delta_time)
+{
+    // cap delta_time to slow camera motion when framerates are low
+    constexpr F32 MAX_DELTA_TIME = 0.2f;
+    if (delta_time > MAX_DELTA_TIME)
+    {
+        delta_time = MAX_DELTA_TIME;
+    }
+
+    if (mLinearVelocity.lengthSquared() > 0.0f)
+    {
+        mPosition += delta_time * mLinearVelocity;
+    }
+
+    F32 angle = mPitchRate * delta_time;
+    bool needs_renormalization = false;
+    if (fabsf(angle) > 0.0f)
+    {
+        LLQuaternion dQ;
+        dQ.setAngleAxis(angle, 0.0f, 1.0f, 0.0f);
+        mRotation = dQ * mRotation;
+        needs_renormalization = true;
+    }
+
+    angle = mYawRate * delta_time;
+    if (fabsf(angle) > 0.0f)
+    {
+        LLQuaternion dQ;
+        dQ.setAngleAxis(angle, 0.0f, 0.0f, 1.0f);
+        mRotation = dQ * mRotation;
+        needs_renormalization = true;
+    }
+
+    if (needs_renormalization)
+    {
+        mRotation.normalize();
+    }
+
+
+    /*
+    // from llviewerjoystick.cpp
+    LLMatrix3 mat(sFlycamRotation);
+    LLViewerCamera::getInstance()->setView(sFlycamZoom);
+    LLViewerCamera::getInstance()->setOrigin(sFlycamPosition);
+    LLViewerCamera::getInstance()->mXAxis = LLVector3(mat.mMatrix[0]);
+    LLViewerCamera::getInstance()->mYAxis = LLVector3(mat.mMatrix[1]);
+    LLViewerCamera::getInstance()->mZAxis = LLVector3(mat.mMatrix[2]);
+    */
+}
-- 
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