VDH
82 lines
2.7 KiB
C#
82 lines
2.7 KiB
C#
using UnityEngine;
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namespace BrewMonster
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{
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/// <summary>
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/// Parabolic trajectory movement with gravity.
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/// Mirrors C++ CGfxParabolicMove exactly (A3DSkillGfxEvent2.cpp:54-92).
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/// 抛物线轨迹移动（带重力），完全镜像C++ CGfxParabolicMove。
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/// </summary>
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public class CGfxParabolicMove : CGfxMoveBase
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{
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protected Vector3 m_vOrgPos;
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protected Vector3 m_vHorzVel;
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protected float m_fVertVel;
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protected float m_fTotalTime;
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protected float m_fCurTime;
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protected float m_fSpeed;
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private const float _fly_speed = 20.0f / 1000.0f; // units per ms, same as C++
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private const float _gravity = 9.8e-6f; // gravity constant, same as C++
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public CGfxParabolicMove(GfxMoveMode mode) : base(mode) { }
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/// <summary>
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/// Initialize parabolic trajectory from host to target.
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/// 初始化从施法者到目标的抛物线轨迹。
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/// </summary>
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public override void StartMove(Vector3 vHost, Vector3 vTarget)
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{
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if (m_bArea)
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{
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CalcRange((vTarget - vHost).normalized);
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m_vOrgPos = m_vPos = vHost + GetRandOff();
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}
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else
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{
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m_vOrgPos = m_vPos = vHost;
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}
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m_vHorzVel = vTarget - m_vPos;
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float fVert = m_vHorzVel.y;
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m_vHorzVel.y = 0;
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float fDist = Normalize(ref m_vHorzVel);
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float fMax = _fly_speed * m_dwMaxFlyTime;
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if (fMax >= fDist)
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{
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m_fSpeed = _fly_speed;
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}
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else
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{
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m_fSpeed = fDist / m_dwMaxFlyTime;
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}
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m_fTotalTime = fDist / m_fSpeed;
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m_vHorzVel *= m_fSpeed;
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m_fVertVel = fVert / m_fTotalTime + 0.5f * _gravity * m_fTotalTime;
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m_vMoveDir = (m_vHorzVel + m_fVertVel * Vector3.up).normalized;
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m_fCurTime = 0;
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}
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/// <summary>
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/// Tick parabolic movement. Returns true when target is reached.
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/// 更新抛物线移动。当到达目标时返回true。
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/// </summary>
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public override bool TickMove(uint dwDeltaTime, Vector3 vHostPos, Vector3 vTargetPos)
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{
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m_fCurTime += dwDeltaTime;
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if (m_fCurTime >= m_fTotalTime)
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{
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return true;
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}
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float fVertVel = m_fVertVel - _gravity * m_fCurTime;
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float fVertDist = 0.5f * (fVertVel + m_fVertVel) * m_fCurTime;
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m_vPos = m_vOrgPos + m_fCurTime * m_vHorzVel + fVertDist * Vector3.up;
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m_vMoveDir = (m_vHorzVel + fVertVel * Vector3.up).normalized;
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return false;
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}
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}
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}
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