Core/Misc: Moved Position to its own file

(cherry picked from commit 48ee1f003347910a48183f768501c1080fc40269)

Conflicts:
	src/server/game/Entities/Object/Object.cpp
	src/server/game/Entities/Object/Object.h
	src/server/game/Spells/Spell.cpp

src/server/game/Entities/Object/Position.cpp

@@ -0,0 +1,182 @@
+/*
+ * Copyright (C) 2008-2015 TrinityCore <http://www.trinitycore.org/>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program 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 General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "Position.h"
+#include "ByteBuffer.h"
+
+bool Position::operator==(Position const &a)
+{
+    return (G3D::fuzzyEq(a.m_positionX, m_positionX) &&
+        G3D::fuzzyEq(a.m_positionY, m_positionY) &&
+        G3D::fuzzyEq(a.m_positionZ, m_positionZ) &&
+        G3D::fuzzyEq(a.m_orientation, m_orientation));
+}
+
+void Position::RelocateOffset(const Position & offset)
+{
+    m_positionX = GetPositionX() + (offset.GetPositionX() * std::cos(GetOrientation()) + offset.GetPositionY() * std::sin(GetOrientation() + float(M_PI)));
+    m_positionY = GetPositionY() + (offset.GetPositionY() * std::cos(GetOrientation()) + offset.GetPositionX() * std::sin(GetOrientation()));
+    m_positionZ = GetPositionZ() + offset.GetPositionZ();
+    SetOrientation(GetOrientation() + offset.GetOrientation());
+}
+
+bool Position::IsPositionValid() const
+{
+    return Trinity::IsValidMapCoord(m_positionX, m_positionY, m_positionZ, m_orientation);
+}
+
+void Position::GetPositionOffsetTo(const Position & endPos, Position & retOffset) const
+{
+    float dx = endPos.GetPositionX() - GetPositionX();
+    float dy = endPos.GetPositionY() - GetPositionY();
+
+    retOffset.m_positionX = dx * std::cos(GetOrientation()) + dy * std::sin(GetOrientation());
+    retOffset.m_positionY = dy * std::cos(GetOrientation()) - dx * std::sin(GetOrientation());
+    retOffset.m_positionZ = endPos.GetPositionZ() - GetPositionZ();
+    retOffset.SetOrientation(endPos.GetOrientation() - GetOrientation());
+}
+
+Position Position::GetPositionWithOffset(Position const& offset) const
+{
+    Position ret(*this);
+    ret.RelocateOffset(offset);
+    return ret;
+}
+
+float Position::GetAngle(const Position* obj) const
+{
+    if (!obj)
+        return 0;
+
+    return GetAngle(obj->GetPositionX(), obj->GetPositionY());
+}
+
+// Return angle in range 0..2*pi
+float Position::GetAngle(float x, float y) const
+{
+    float dx = x - GetPositionX();
+    float dy = y - GetPositionY();
+
+    float ang = std::atan2(dy, dx);
+    ang = (ang >= 0) ? ang : 2 * float(M_PI) + ang;
+    return ang;
+}
+
+void Position::GetSinCos(const float x, const float y, float &vsin, float &vcos) const
+{
+    float dx = GetPositionX() - x;
+    float dy = GetPositionY() - y;
+
+    if (std::fabs(dx) < 0.001f && std::fabs(dy) < 0.001f)
+    {
+        float angle = (float)rand_norm()*static_cast<float>(2 * M_PI);
+        vcos = std::cos(angle);
+        vsin = std::sin(angle);
+    }
+    else
+    {
+        float dist = std::sqrt((dx*dx) + (dy*dy));
+        vcos = dx / dist;
+        vsin = dy / dist;
+    }
+}
+
+bool Position::HasInArc(float arc, const Position* obj, float border) const
+{
+    // always have self in arc
+    if (obj == this)
+        return true;
+
+    // move arc to range 0.. 2*pi
+    arc = NormalizeOrientation(arc);
+
+    float angle = GetAngle(obj);
+    angle -= m_orientation;
+
+    // move angle to range -pi ... +pi
+    angle = NormalizeOrientation(angle);
+    if (angle > float(M_PI))
+        angle -= 2.0f * float(M_PI);
+
+    float lborder = -1 * (arc / border);                        // in range -pi..0
+    float rborder = (arc / border);                             // in range 0..pi
+    return ((angle >= lborder) && (angle <= rborder));
+}
+
+bool Position::HasInLine(Position const* pos, float width) const
+{
+    if (!HasInArc(float(M_PI), pos))
+        return false;
+
+    float angle = GetRelativeAngle(pos);
+    return std::fabs(std::sin(angle)) * GetExactDist2d(pos->GetPositionX(), pos->GetPositionY()) < width;
+}
+
+std::string Position::ToString() const
+{
+    std::stringstream sstr;
+    sstr << "X: " << m_positionX << " Y: " << m_positionY << " Z: " << m_positionZ << " O: " << m_orientation;
+    return sstr.str();
+}
+
+ByteBuffer& operator<<(ByteBuffer& buf, Position::PositionXYStreamer const& streamer)
+{
+    buf << streamer.Pos->GetPositionX();
+    buf << streamer.Pos->GetPositionY();
+    return buf;
+}
+
+ByteBuffer& operator>>(ByteBuffer& buf, Position::PositionXYStreamer const& streamer)
+{
+    float x, y;
+    buf >> x >> y;
+    streamer.Pos->Relocate(x, y);
+    return buf;
+}
+
+ByteBuffer& operator<<(ByteBuffer& buf, Position::PositionXYZStreamer const& streamer)
+{
+    buf << streamer.Pos->GetPositionX();
+    buf << streamer.Pos->GetPositionY();
+    buf << streamer.Pos->GetPositionZ();
+    return buf;
+}
+
+ByteBuffer& operator>>(ByteBuffer& buf, Position::PositionXYZStreamer const& streamer)
+{
+    float x, y, z;
+    buf >> x >> y >> z;
+    streamer.Pos->Relocate(x, y, z);
+    return buf;
+}
+
+ByteBuffer& operator<<(ByteBuffer& buf, Position::PositionXYZOStreamer const& streamer)
+{
+    buf << streamer.Pos->GetPositionX();
+    buf << streamer.Pos->GetPositionY();
+    buf << streamer.Pos->GetPositionZ();
+    buf << streamer.Pos->GetOrientation();
+    return buf;
+}
+
+ByteBuffer& operator>>(ByteBuffer& buf, Position::PositionXYZOStreamer const& streamer)
+{
+    float x, y, z, o;
+    buf >> x >> y >> z >> o;
+    streamer.Pos->Relocate(x, y, z, o);
+    return buf;
+}