public RayCast ( BEPUutilities.Ray ray, bool>.Func |
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ray | BEPUutilities.Ray | Ray to test. |
filter | bool>.Func | Delegate to prune out hit candidates before performing a ray cast against them. Return true from the filter to process an entry or false to ignore the entry. |
result | Hit data of the ray, if any. | |
리턴 | bool |
/// <summary> /// Determines whether there is a cliff nearby. /// </summary> /// <param name="position">Position to look from.</param> /// <param name="facingDirection">Direction to check in.</param> /// <param name="filter">Anonymous function to filter out unwanted objects.</param> /// <param name="space">The space to check for a cliff in.</param> /// <param name="distance">The distance to check at.</param> /// <returns>True if a cliff was detected, false otherwise.</returns> public static bool FindCliff(Vector3 position, Vector3 facingDirection, Func<BroadPhaseEntry, bool> filter, Space space, float distance) { // If there is a wall before the requested distance assume there is no cliff. Ray forwardRay = new Ray(position, new Vector3(facingDirection.X, 0, facingDirection.Z)); RayCastResult forwardResult = new RayCastResult(); space.RayCast(forwardRay, filter, out forwardResult); if ((forwardResult.HitData.Location - position).Length() < distance) { return false; } facingDirection.Normalize(); Ray futureDownRay = new Ray(position + new Vector3(facingDirection.X * distance, 0, facingDirection.Z * distance), Vector3.Down); RayCastResult result = new RayCastResult(); space.RayCast(futureDownRay, filter, out result); Vector3 drop = result.HitData.Location - futureDownRay.Position; if (drop.Y < -6.0f) { return true; } else { return false; } }
/// <summary> /// Determines whether there is a wall nearby. /// </summary> /// <param name="position">Position to look from.</param> /// <param name="facingDirection">Direction to check in.</param> /// <param name="filter">Anonymous function to filter out unwanted objects.</param> /// <param name="space">The space to check for a wall in.</param> /// <param name="distance">The distance to check within.</param> /// <returns>True if a wall was detected, false otherwise.</returns> public static bool FindWall(Vector3 position, Vector3 facingDirection, Func<BroadPhaseEntry, bool> filter, Space space, float distance, out RayCastResult result) { Ray forwardRay = new Ray(position, new Vector3(facingDirection.X, 0, facingDirection.Z)); result = new RayCastResult(); space.RayCast(forwardRay, filter, out result); Vector3 flatNormal = new Vector3(result.HitData.Normal.X, 0, result.HitData.Normal.Z); float normalDot = Vector3.Dot(result.HitData.Normal, flatNormal); float minDot = (float)Math.Cos(MathHelper.PiOver4) * flatNormal.Length() * result.HitData.Normal.Length(); if ((result.HitData.Location - forwardRay.Position).Length() < distance && normalDot > minDot) { return true; } else { return false; } }