Hondacrx
b444c2f23c
Port From (https://github.com/TrinityCore/TrinityCore/commit/3596ecaf311819cd0b34c511b7cdc9b09a411f6d)
477 lines
19 KiB
C#
477 lines
19 KiB
C#
// Copyright (c) CypherCore <http://github.com/CypherCore> All rights reserved.
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// Licensed under the GNU GENERAL PUBLIC LICENSE. See LICENSE file in the project root for full license information.
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using Framework.Constants;
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using Framework.Dynamic;
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using System;
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using System.Collections.Generic;
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using System.Numerics;
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namespace Game.Movement
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{
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public class MoveSpline
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{
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public MoveSpline()
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{
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m_Id = 0;
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time_passed = 0;
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vertical_acceleration = 0.0f;
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initialOrientation = 0.0f;
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effect_start_time = 0;
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point_Idx = 0;
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point_Idx_offset = 0;
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onTransport = false;
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splineIsFacingOnly = false;
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splineflags.Flags = MoveSplineFlagEnum.Done;
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}
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public void Initialize(MoveSplineInitArgs args)
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{
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splineflags = args.flags;
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facing = args.facing;
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m_Id = args.splineId;
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point_Idx_offset = args.path_Idx_offset;
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initialOrientation = args.initialOrientation;
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time_passed = 0;
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vertical_acceleration = 0.0f;
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effect_start_time = 0;
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spell_effect_extra = args.spellEffectExtra;
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anim_tier = args.animTier;
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splineIsFacingOnly = args.path.Count == 2 && args.facing.type != MonsterMoveType.Normal && ((args.path[1] - args.path[0]).Length() < 0.1f);
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velocity = args.velocity;
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// Check if its a stop spline
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if (args.flags.HasFlag(MoveSplineFlagEnum.Done))
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{
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spline.Clear();
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return;
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}
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InitSpline(args);
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// init parabolic / animation
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// spline initialized, duration known and i able to compute parabolic acceleration
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if (args.flags.HasFlag(MoveSplineFlagEnum.Parabolic | MoveSplineFlagEnum.Animation | MoveSplineFlagEnum.FadeObject))
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{
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int spline_duration = Duration();
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effect_start_time = (int)(spline_duration * args.effect_start_time_percent + args.effect_start_time.TotalMilliseconds);
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if (effect_start_time > spline_duration)
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effect_start_time = spline_duration;
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if (args.flags.HasFlag(MoveSplineFlagEnum.Parabolic) && effect_start_time < spline_duration)
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{
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if (args.parabolic_amplitude != 0.0f)
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{
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float f_duration = MSToSec((uint)(spline_duration - effect_start_time));
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vertical_acceleration = args.parabolic_amplitude * 8.0f / (f_duration * f_duration);
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}
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else if (args.vertical_acceleration != 0.0f)
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{
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vertical_acceleration = args.vertical_acceleration;
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}
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}
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}
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}
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void InitSpline(MoveSplineInitArgs args)
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{
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EvaluationMode[] modes = new EvaluationMode[2] { EvaluationMode.Linear, EvaluationMode.Catmullrom };
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if (args.flags.HasFlag(MoveSplineFlagEnum.Cyclic))
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{
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int cyclic_point = 0;
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if (splineflags.HasFlag(MoveSplineFlagEnum.EnterCycle))
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cyclic_point = 1; // shouldn't be modified, came from client
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spline.InitCyclicSpline(args.path.ToArray(), args.path.Count, modes[Convert.ToInt32(args.flags.IsSmooth())], cyclic_point, args.initialOrientation);
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}
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else
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{
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spline.InitSpline(args.path.ToArray(), args.path.Count, modes[Convert.ToInt32(args.flags.IsSmooth())], args.initialOrientation);
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}
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// init spline timestamps
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if (splineflags.HasFlag(MoveSplineFlagEnum.Falling))
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{
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FallInitializer init = new(spline.GetPoint(spline.First()).Z);
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spline.InitLengths(init);
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}
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else
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{
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CommonInitializer init = new(args.velocity);
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spline.InitLengths(init);
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}
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// TODO: what to do in such cases? problem is in input data (all points are at same coords)
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if (spline.Length() < 1)
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{
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Log.outError(LogFilter.Unit, "MoveSpline.init_spline: zero length spline, wrong input data?");
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spline.Set_length(spline.Last(), spline.IsCyclic() ? 1000 : 1);
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}
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point_Idx = spline.First();
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}
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public int CurrentPathIdx()
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{
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int point = point_Idx_offset + point_Idx - spline.First() + (Finalized() ? 1 : 0);
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if (IsCyclic())
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point %= (spline.Last() - spline.First());
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return point;
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}
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public Vector3[] GetPath() { return spline.GetPoints(); }
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public int timeRemaining() { return Duration() - time_passed; }
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public int TimePassed() { return time_passed; }
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public int Duration() { return spline.Length(); }
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public int CurrentSplineIdx() { return point_Idx; }
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public uint GetId() { return m_Id; }
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public bool Finalized() { return splineflags.HasFlag(MoveSplineFlagEnum.Done); }
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void _Finalize()
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{
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splineflags.SetUnsetFlag(MoveSplineFlagEnum.Done);
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point_Idx = spline.Last() - 1;
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time_passed = Duration();
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}
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public Vector4 ComputePosition(int time_point, int point_index)
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{
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float u = 1.0f;
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int seg_time = spline.Length(point_index, point_index + 1);
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if (seg_time > 0)
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u = (time_point - spline.Length(point_index)) / (float)seg_time;
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Vector3 c;
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float orientation = initialOrientation;
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spline.Evaluate_Percent(point_index, u, out c);
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if (splineflags.HasFlag(MoveSplineFlagEnum.Parabolic))
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ComputeParabolicElevation(time_point, ref c.Z);
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else if (splineflags.HasFlag(MoveSplineFlagEnum.Falling))
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ComputeFallElevation(time_point, ref c.Z);
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if (splineflags.HasFlag(MoveSplineFlagEnum.Done) && facing.type != MonsterMoveType.Normal)
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{
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if (facing.type == MonsterMoveType.FacingAngle)
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orientation = facing.angle;
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else if (facing.type == MonsterMoveType.FacingSpot)
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orientation = MathF.Atan2(facing.f.Y - c.Y, facing.f.X - c.X);
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//nothing to do for MoveSplineFlag.Final_Target flag
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}
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else
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{
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if (!splineflags.HasFlag(MoveSplineFlagEnum.OrientationFixed | MoveSplineFlagEnum.Falling | MoveSplineFlagEnum.JumpOrientationFixed))
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{
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Vector3 hermite;
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spline.Evaluate_Derivative(point_index, u, out hermite);
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if (hermite.X != 0f || hermite.Y != 0f)
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orientation = MathF.Atan2(hermite.Y, hermite.X);
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}
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if (splineflags.HasFlag(MoveSplineFlagEnum.Backward))
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orientation -= MathF.PI;
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}
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return new Vector4(c.X, c.Y, c.Z, orientation);
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}
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public Vector4 ComputePosition()
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{
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return ComputePosition(time_passed, point_Idx);
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}
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public Vector4 ComputePosition(int time_offset)
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{
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int time_point = time_passed + time_offset;
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if (time_point >= Duration())
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return ComputePosition(Duration(), spline.Last() - 1);
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if (time_point <= 0)
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return ComputePosition(0, spline.First());
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// find point_index where spline.length(point_index) < time_point < spline.length(point_index + 1)
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int point_index = point_Idx;
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while (time_point >= spline.Length(point_index + 1))
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++point_index;
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while (time_point < spline.Length(point_index))
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--point_index;
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return ComputePosition(time_point, point_index);
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}
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public void ComputeParabolicElevation(int time_point, ref float el)
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{
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if (time_point > effect_start_time)
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{
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float t_passedf = MSToSec((uint)(time_point - effect_start_time));
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float t_durationf = MSToSec((uint)(Duration() - effect_start_time)); //client use not modified duration here
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if (spell_effect_extra != null && spell_effect_extra.ParabolicCurveId != 0)
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t_passedf *= Global.DB2Mgr.GetCurveValueAt(spell_effect_extra.ParabolicCurveId, (float)time_point / Duration());
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el += (t_durationf - t_passedf) * 0.5f * vertical_acceleration * t_passedf;
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}
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}
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public void ComputeFallElevation(int time_point, ref float el)
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{
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float z_now = spline.GetPoint(spline.First()).Z - ComputeFallElevation(MSToSec((uint)time_point), false);
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float final_z = FinalDestination().Z;
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el = Math.Max(z_now, final_z);
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}
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public static float ComputeFallElevation(float t_passed, bool isSafeFall, float start_velocity = 0.0f)
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{
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float termVel;
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float result;
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if (isSafeFall)
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termVel = SharedConst.terminalSafefallVelocity;
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else
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termVel = SharedConst.terminalVelocity;
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if (start_velocity > termVel)
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start_velocity = termVel;
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float terminal_time = (float)((isSafeFall ? SharedConst.terminal_safeFall_fallTime : SharedConst.terminal_fallTime) - start_velocity / SharedConst.gravity); // the time that needed to reach terminalVelocity
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if (t_passed > terminal_time)
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{
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result = termVel * (t_passed - terminal_time) +
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start_velocity * terminal_time +
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(float)SharedConst.gravity * terminal_time * terminal_time * 0.5f;
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}
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else
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result = t_passed * (float)(start_velocity + t_passed * SharedConst.gravity * 0.5f);
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return result;
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}
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float MSToSec(uint ms)
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{
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return ms / 1000.0f;
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}
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public bool HasStarted()
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{
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return time_passed > 0;
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}
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public void Interrupt() { splineflags.SetUnsetFlag(MoveSplineFlagEnum.Done); }
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public void UpdateState(int difftime)
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{
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do
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{
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UpdateState(ref difftime);
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} while (difftime > 0);
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}
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UpdateResult UpdateState(ref int ms_time_diff)
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{
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if (Finalized())
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{
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ms_time_diff = 0;
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return UpdateResult.Arrived;
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}
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UpdateResult result = UpdateResult.None;
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int minimal_diff = Math.Min(ms_time_diff, SegmentTimeElapsed());
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time_passed += minimal_diff;
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ms_time_diff -= minimal_diff;
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if (time_passed >= NextTimestamp())
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{
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++point_Idx;
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if (point_Idx < spline.Last())
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{
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result = UpdateResult.NextSegment;
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}
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else
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{
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if (spline.IsCyclic())
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{
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point_Idx = spline.First();
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time_passed %= Duration();
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result = UpdateResult.NextCycle;
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// Remove first point from the path after one full cycle.
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// That point was the position of the unit prior to entering the cycle and it shouldn't be repeated with continuous cycles.
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if (splineflags.HasFlag(MoveSplineFlagEnum.EnterCycle))
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{
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splineflags.SetUnsetFlag(MoveSplineFlagEnum.EnterCycle, false);
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MoveSplineInitArgs args = new(spline.GetPointCount());
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args.path.AddRange(spline.GetPoints().AsSpan().Slice(spline.First() + 1, spline.Last()).ToArray());
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args.facing = facing;
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args.flags = splineflags;
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args.path_Idx_offset = point_Idx_offset;
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// MoveSplineFlag::Parabolic | MoveSplineFlag::Animation not supported currently
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//args.parabolic_amplitude = ?;
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//args.time_perc = ?;
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args.splineId = m_Id;
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args.initialOrientation = initialOrientation;
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args.velocity = 1.0f; // Calculated below
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args.HasVelocity = true;
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args.TransformForTransport = onTransport;
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if (args.Validate(null))
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{
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// New cycle should preserve previous cycle's duration for some weird reason, even though
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// the path is really different now. Blizzard is weird. Or this was just a simple oversight.
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// Since our splines precalculate length with velocity in mind, if we want to find the desired
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// velocity, we have to make a fake spline, calculate its duration and then compare it to the
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// desired duration, thus finding out how much the velocity has to be increased for them to match.
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MoveSpline tempSpline = new();
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tempSpline.Initialize(args);
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args.velocity = (float)tempSpline.Duration() / Duration();
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if (args.Validate(null))
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InitSpline(args);
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}
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}
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}
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else
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{
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_Finalize();
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ms_time_diff = 0;
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result = UpdateResult.Arrived;
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}
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}
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}
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return result;
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}
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int NextTimestamp() { return spline.Length(point_Idx + 1); }
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int SegmentTimeElapsed() { return NextTimestamp() - time_passed; }
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public bool IsCyclic() { return splineflags.HasFlag(MoveSplineFlagEnum.Cyclic); }
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public bool IsFalling() { return splineflags.HasFlag(MoveSplineFlagEnum.Falling); }
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public bool Initialized() { return !spline.Empty(); }
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public Vector3 FinalDestination() { return Initialized() ? spline.GetPoint(spline.Last()) : Vector3.Zero; }
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public Vector3 CurrentDestination() { return Initialized() ? spline.GetPoint(point_Idx + 1) : Vector3.Zero; }
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public AnimTier? GetAnimation() { return anim_tier != null ? (AnimTier)anim_tier.AnimTier : null; }
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#region Fields
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public MoveSplineInitArgs InitArgs;
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public Spline<int> spline = new();
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public FacingInfo facing;
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public MoveSplineFlag splineflags = new();
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public bool onTransport;
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public bool splineIsFacingOnly;
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public uint m_Id;
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public int time_passed;
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public float vertical_acceleration;
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public float initialOrientation;
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public int effect_start_time;
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public int point_Idx;
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public int point_Idx_offset;
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public float velocity;
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public SpellEffectExtraData spell_effect_extra;
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public AnimTierTransition anim_tier;
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#endregion
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public class CommonInitializer : IInitializer<int>
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{
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public CommonInitializer(float _velocity)
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{
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velocityInv = 1000f / _velocity;
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time = 1;
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}
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public float velocityInv;
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public int time;
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public int Invoke(Spline<int> s, int i)
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{
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time += (int)(s.SegLength(i) * velocityInv);
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return time;
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}
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}
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public class FallInitializer : IInitializer<int>
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{
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public FallInitializer(float startelevation)
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{
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startElevation = startelevation;
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}
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float startElevation;
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public int Invoke(Spline<int> s, int i)
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{
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return (int)(ComputeFallTime(startElevation - s.GetPoint(i + 1).Z, false) * 1000.0f);
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}
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float ComputeFallTime(float path_length, bool isSafeFall)
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{
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if (path_length < 0.0f)
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return 0.0f;
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float time;
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if (isSafeFall)
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{
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if (path_length >= SharedConst.terminal_safeFall_length)
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time = (path_length - SharedConst.terminal_safeFall_length) / SharedConst.terminalSafefallVelocity + SharedConst.terminal_safeFall_fallTime;
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else
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time = (float)Math.Sqrt(2.0f * path_length / SharedConst.gravity);
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}
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else
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{
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if (path_length >= SharedConst.terminal_length)
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time = (path_length - SharedConst.terminal_length) / SharedConst.terminalVelocity + SharedConst.terminal_fallTime;
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else
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time = (float)Math.Sqrt(2.0f * path_length / SharedConst.gravity);
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}
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return time;
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}
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}
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public enum UpdateResult
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{
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None = 0x01,
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Arrived = 0x02,
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NextCycle = 0x04,
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NextSegment = 0x08
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}
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}
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public interface IInitializer<T>
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{
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int Invoke(Spline<T> s, int i);
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}
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public class SplineChainLink
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{
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public List<Vector3> Points = new();
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public uint ExpectedDuration;
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public uint TimeToNext;
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public float Velocity;
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public SplineChainLink(Vector3[] points, uint expectedDuration, uint msToNext, float velocity)
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{
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Points.AddRange(points);
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ExpectedDuration = expectedDuration;
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TimeToNext = msToNext;
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Velocity = velocity;
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}
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public SplineChainLink(uint expectedDuration, uint msToNext, float velocity)
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{
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ExpectedDuration = expectedDuration;
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TimeToNext = msToNext;
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Velocity = velocity;
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}
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}
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public class SplineChainResumeInfo
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{
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public SplineChainResumeInfo() { }
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public SplineChainResumeInfo(uint id, List<SplineChainLink> chain, bool walk, byte splineIndex, byte wpIndex, uint msToNext)
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{
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PointID = id;
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Chain = chain;
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IsWalkMode = walk;
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SplineIndex = splineIndex;
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PointIndex = wpIndex;
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TimeToNext = msToNext;
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}
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public bool Empty() { return Chain.Empty(); }
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public void Clear() { Chain.Clear(); }
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public uint PointID;
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public List<SplineChainLink> Chain = new();
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public bool IsWalkMode;
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public byte SplineIndex;
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public byte PointIndex;
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public uint TimeToNext;
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}
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}
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