/// <summary>
/// Update the trail manager
/// </summary>
/// <param name="gameTime">The current game time.</param>
protected override void Update(TimeSpan gameTime)
{
for (int i = this.BusyTrails.Count - 1; i >= 0; i--)
{
TrailSetting trail = this.BusyTrails[i];
trail.CurrentTime += gameTime.TotalSeconds;
if (!trail.Finished && trail.NextPointTime <= trail.CurrentTime)
{
trail.Points.Add(new TrailPoint()
{
Position = trail.Transform.Position,
Time = trail.CurrentTime
});
trail.NextPointTime = trail.CurrentTime + trail.TimeStep;
this.TrailPointsCount++;
}
if (trail.CurrentTime - trail.Points[0].Time > trail.ExpirationTime)
{
trail.Points.RemoveAt(0);
this.TrailPointsCount--;
}
if (trail.Finished && trail.Points.Count == 0)
{
this.RemoveTrail(trail);
}
}
}
/// <summary>
/// Process a trail point
/// </summary>
/// <param name="trail">The trail setting</param>
/// <param name="start">start position</param>
/// <param name="end">end position</param>
/// <param name="lerp">Lerp factor</param>
private void ProcessTrailPoint(TrailSetting trail, ref Vector3 start, ref Vector3 end, float lerp)
{
Vector3 diff = end - start;
Vector3 eyeDir = start - this.RenderManager.ActiveCamera3D.Position;
float halfThickness = trail.Thickness;
Vector3 perpendicular;
Vector3.Cross(ref eyeDir, ref diff, out perpendicular);
perpendicular.Normalize();
this.vertices[this.currentVertexId].Position = end + (perpendicular * halfThickness);
this.vertices[this.currentVertexId].TexCoord = new Vector2(lerp, 0);
this.vertices[this.currentVertexId].Color = Color.White * lerp;
this.indices[this.currentIndexId] = (ushort)this.currentVertexId;
this.currentVertexId++;
this.currentIndexId++;
this.vertices[this.currentVertexId].Position = end - (perpendicular * halfThickness);
this.vertices[this.currentVertexId].TexCoord = new Vector2(lerp, 1);
this.vertices[this.currentVertexId].Color = Color.White * lerp;
this.indices[this.currentIndexId] = (ushort)this.currentVertexId;
this.currentVertexId++;
this.currentIndexId++;
}
/// <summary>
/// Process a middle trail point
/// </summary>
/// <param name="trail">The current trail</param>
private void ProcessTrailPoint(TrailSetting trail, int pointId)
{
Vector3 start = trail.Points[pointId - 1].Position;
Vector3 end = trail.Points[pointId].Position;
double pointTime = trail.Points[pointId].Time;
float lerp = (float)((trail.CurrentTime - pointTime) / trail.ExpirationTime);
ProcessTrailPoint(trail, ref start, ref end, lerp);
}
/// <summary>
/// Instantiate the trails
/// </summary>
/// <param name="numTrails">The number of trails to instantiate</param>
private void InstantiateTrails(int numTrails)
{
for (int i = 0; i < numTrails; i++)
{
TrailSetting trail = new TrailSetting();
this.FreeTrails.Add(trail);
}
this.Capacity += numTrails;
}
/// <summary>
/// Draw the trail mesh
/// </summary>
/// <param name="gameTime">The current game time</param>
public override void Draw(TimeSpan gameTime)
{
if (this.manager.NumTrails == 0)
{
return;
}
Vector3 cameraPos = this.RenderManager.CurrentDrawingCamera3D.Position;
int vertexPrediction = this.manager.TrailPointsCount * VerticesPerTrailPoint;
int indexPrediction = vertexPrediction + (this.manager.NumTrails * 4);
if (indexPrediction >= this.nIndices || vertexPrediction >= this.nVertices)
{
this.nIndices = indexPrediction + VerticesStep;
this.nVertices = vertexPrediction + VerticesStep;
this.BuildMesh();
}
this.currentVertexId = 0;
this.currentIndexId = 0;
int trailCount = this.manager.NumTrails;
for (int i = 0; i < trailCount; i++)
{
TrailSetting trail = this.manager.BusyTrails[i];
int numPoints = trail.Points.Count;
if (numPoints < 2)
{
continue;
}
this.ProcessStartPoint(trail);
for (int j = 1; j < trail.Points.Count; j++)
{
this.ProcessTrailPoint(trail, j);
}
this.ProcessEndPoint(trail);
}
this.mesh.VertexBuffer.SetData(this.vertices, this.currentVertexId);
this.mesh.IndexBuffer.SetData(this.indices, this.currentIndexId);
this.GraphicsDevice.BindVertexBuffer(this.mesh.VertexBuffer);
this.GraphicsDevice.BindIndexBuffer(this.mesh.IndexBuffer);
this.mesh.NumPrimitives = this.currentIndexId - 2;
this.RenderManager.DrawMesh(this.mesh, this.material, ref identity);
}
/// <summary>
/// Remove the trail
/// </summary>
/// <param name="trail"></param>
private void RemoveTrail(TrailSetting trail)
{
if (this.BusyTrails.Remove(trail))
{
this.TrailPointsCount -= trail.Points.Count;
this.NumTrails--;
this.FreeTrails.Add(trail);
if (this.BusyTrails.Count == 0)
{
this.IsActive = false;
}
}
}
/// <summary>
/// Process the end point of a trail
/// </summary>
/// <param name="trail">The current trail</param>
private void ProcessEndPoint(TrailSetting trail)
{
Vector3 start = trail.Points.Last().Position;
Vector3 end = trail.Transform.Position;
Color c = Color.White;
float lerp = 0;
if (trail.Finished)
{
double pointTime = trail.Points.Last().Time;
lerp = (float)((trail.CurrentTime - pointTime) / trail.ExpirationTime);
}
ProcessTrailPoint(trail, ref start, ref end, lerp);
}
/// <summary>
/// Process a start point of a trail
/// </summary>
/// <param name="trail">The current trail</param>
private void ProcessStartPoint(TrailSetting trail)
{
if (this.currentIndexId != 0)
{
// Concatenate two triangle strips...
this.indices[this.currentIndexId + 0] = (ushort)(this.currentVertexId - 1);
this.indices[this.currentIndexId + 1] = (ushort)(this.currentVertexId);
this.indices[this.currentIndexId + 2] = (ushort)(this.currentVertexId);
this.indices[this.currentIndexId + 3] = (ushort)(this.currentVertexId + 1);
this.currentIndexId += 4;
}
Vector3 start = trail.Points[0].Position;
Vector3 end = trail.Points[1].Position;
double pointTime = trail.Points[1].Time;
float lerp = (float)((trail.CurrentTime - pointTime) / trail.ExpirationTime);
ProcessTrailPoint(trail, ref start, ref end, 0);
}
/// <summary>
/// Get a free trail
/// </summary>
/// <param name="transform">The transform to follow the trail</param>
/// <returns></returns>
public TrailSetting GetFreeTrail(Transform3D transform)
{
if (this.FreeTrails.Count == 0)
{
this.InstantiateTrails(TrailCountIncrement);
}
TrailSetting trail = this.FreeTrails[0];
this.FreeTrails.RemoveAt(0);
this.BusyTrails.Add(trail);
this.NumTrails++;
trail.Transform = transform;
trail.Reset();
if (!this.IsActive)
{
this.IsActive = true;
}
return(trail);
}
/// <summary>
/// Draw debug lines
/// </summary>
protected override void DrawDebugLines()
{
base.DrawDebugLines();
return;
if (this.manager.NumTrails == 0)
{
return;
}
int trailCount = this.manager.NumTrails;
for (int i = 0; i < trailCount; i++)
{
TrailSetting trail = this.manager.BusyTrails[i];
int numPoints = trail.Points.Count;
for (int j = 0; j < trail.Points.Count; j++)
{
this.RenderManager.LineBatch3D.DrawPoint(trail.Points[j].Position, 4, Color.Yellow);
}
}
}
/// <summary>
/// Release a trail
/// </summary>
/// <param name="trail">The trail instance to release</param>
public void FreeTrail(TrailSetting trail)
{
trail.Finished = true;
}
/// <summary>
/// Remove the trail
/// </summary>
/// <param name="trail"></param>
private void RemoveTrail(TrailSetting trail)
{
if (this.BusyTrails.Remove(trail))
{
this.TrailPointsCount -= trail.Points.Count;
this.NumTrails--;
this.FreeTrails.Add(trail);
if (this.BusyTrails.Count == 0)
{
this.IsActive = false;
}
}
}
/// <summary>
/// Process a middle trail point
/// </summary>
/// <param name="trail">The current trail</param>
private void ProcessTrailPoint(TrailSetting trail, int pointId)
{
Vector3 start = trail.Points[pointId - 1].Position;
Vector3 end = trail.Points[pointId].Position;
double pointTime = trail.Points[pointId].Time;
float lerp = (float)((trail.CurrentTime - pointTime) / trail.ExpirationTime);
ProcessTrailPoint(trail, ref start, ref end, lerp);
}
/// <summary>
/// Release a trail
/// </summary>
/// <param name="trail">The trail instance to release</param>
public void FreeTrail(TrailSetting trail)
{
trail.Finished = true;
}
/// <summary>
/// Process the end point of a trail
/// </summary>
/// <param name="trail">The current trail</param>
private void ProcessEndPoint(TrailSetting trail)
{
Vector3 start = trail.Points.Last().Position;
Vector3 end = trail.Transform.Position;
Color c = Color.White;
float lerp = 0;
if (trail.Finished)
{
double pointTime = trail.Points.Last().Time;
lerp = (float)((trail.CurrentTime - pointTime) / trail.ExpirationTime);
}
ProcessTrailPoint(trail, ref start, ref end, lerp);
}
/// <summary>
/// Process a start point of a trail
/// </summary>
/// <param name="trail">The current trail</param>
private void ProcessStartPoint(TrailSetting trail)
{
if (this.currentIndexId != 0)
{
// Concatenate two triangle strips...
this.indices[this.currentIndexId + 0] = (ushort)(this.currentVertexId - 1);
this.indices[this.currentIndexId + 1] = (ushort)(this.currentVertexId);
this.indices[this.currentIndexId + 2] = (ushort)(this.currentVertexId);
this.indices[this.currentIndexId + 3] = (ushort)(this.currentVertexId + 1);
this.currentIndexId += 4;
}
Vector3 start = trail.Points[0].Position;
Vector3 end = trail.Points[1].Position;
double pointTime = trail.Points[1].Time;
float lerp = (float)((trail.CurrentTime - pointTime) / trail.ExpirationTime);
ProcessTrailPoint(trail, ref start, ref end, 0);
}
/// <summary>
/// Initializes the fighter controller
/// </summary>
protected override void Initialize()
{
base.Initialize();
// Init engine trails
this.trails = new List <TrailSetting>();
foreach (var trailEntity in this.Owner.FindChildrenByTag("Trail"))
{
Transform3D trailTransform = trailEntity.FindComponent <Transform3D>();
TrailSetting trail = this.trailManager.GetFreeTrail(trailTransform);
trail.Thickness = 1;
trail.ExpirationTime = 1f;
trail.TimeStep = 0.02;
}
// Register fighter in screenplay manager
var screenplay = this.EntityManager.Find("ScreenplayManager").FindComponent <ScreenplayManager>();
screenplay.RegisterFighter(new FighterSetting()
{
State = this.State,
Transform = transform3D
});
this.soundManager = this.EntityManager.Find("SoundManager").FindComponent <SoundManager>();
// Gets all fighter guns
this.guns = new List <ProjectileEmitter>();
var gunEntities = this.Owner.ChildEntities.Where(e => e.Tag == "Gun");
foreach (var gunEntity in gunEntities)
{
var projectileEmitter = gunEntity.FindComponent <ProjectileEmitter>();
this.guns.Add(projectileEmitter);
projectileEmitter.OnShoot += projectileEmitter_OnShoot;
}
this.laserTrigger.OnActionChange += laserTrigger_OnActionChange;
// Load sound emitters
var engineSoundEntity = this.Owner.FindChild("engineSoundEmitter");
if (engineSoundEntity == null)
{
engineSoundEntity = this.Owner;
}
this.engineSoundEmitter = engineSoundEntity.FindComponent <SoundEmitter3D>();
var gunsSoundEntity = this.Owner.FindChild("gunsSoundEmitter");
if (gunsSoundEntity == null)
{
gunsSoundEntity = this.Owner;
}
this.gunsSoundEmitter = gunsSoundEntity.FindComponent <SoundEmitter3D>();
}
/// <summary>
/// Process a trail point
/// </summary>
/// <param name="trail">The trail setting</param>
/// <param name="start">start position</param>
/// <param name="end">end position</param>
/// <param name="lerp">Lerp factor</param>
private void ProcessTrailPoint(TrailSetting trail, ref Vector3 start, ref Vector3 end, float lerp)
{
Vector3 diff = end - start;
Vector3 eyeDir = start - this.RenderManager.ActiveCamera3D.Position;
float halfThickness = trail.Thickness;
Vector3 perpendicular;
Vector3.Cross(ref eyeDir, ref diff, out perpendicular);
perpendicular.Normalize();
this.vertices[this.currentVertexId].Position = end + (perpendicular * halfThickness);
this.vertices[this.currentVertexId].TexCoord = new Vector2(lerp, 0);
this.vertices[this.currentVertexId].Color = Color.White * lerp;
this.indices[this.currentIndexId] = (ushort)this.currentVertexId;
this.currentVertexId++;
this.currentIndexId++;
this.vertices[this.currentVertexId].Position = end - (perpendicular * halfThickness);
this.vertices[this.currentVertexId].TexCoord = new Vector2(lerp, 1);
this.vertices[this.currentVertexId].Color = Color.White * lerp;
this.indices[this.currentIndexId] = (ushort)this.currentVertexId;
this.currentVertexId++;
this.currentIndexId++;
}
/// <summary>
/// Instantiate the trails
/// </summary>
/// <param name="numTrails">The number of trails to instantiate</param>
private void InstantiateTrails(int numTrails)
{
for (int i = 0; i < numTrails; i++)
{
TrailSetting trail = new TrailSetting();
this.FreeTrails.Add(trail);
}
this.Capacity += numTrails;
}
