bool InsertSample(Vector3 pos, Vector3 forward, Vector3 right, float timer)
{
if (_samples.Count > 0 && Vector3.Distance(pos, _samples[0].pos) < _minSampleDistance)
{
// 过滤距离过近的点
return(false);
}
if (Time.timeSinceLevelLoad > timer + sampleLife)
{
// 过滤超时的样品
return(false);
}
// 创建mesh样本
SamplePointData newSample = SamplePointData.pool.Get();
newSample.pos = pos;
newSample.forward = forward;
newSample.right = right;
newSample.sampleTimer = timer;
// 插入样本
_samples.Insert(0, newSample);
return(true);
}
/// <summary>
/// 依据clip中固定在武器上的trail对象的移动轨迹获得一系列采样点
/// </summary>
void RawSample(AnimProxy animProxy, TrailMgr.InterpolationMode interpolationMode)
{
// 动画的播放进度
float normalizedTime = animProxy.GetNormalizedTime(clip);
// 遍历设定的每个动画采样时段（注意：时段之间不能有重叠）
foreach (var clipNormalizedTime in clipNormalizedTimes)
{
if (normalizedTime < clipNormalizedTime.startNormalizedTime)
{
// 本时段尚未开始
continue;
}
if (normalizedTime < clipNormalizedTime.stopNormalizedTime)
{
// 进入指定动画进度
if (clipNormalizedTime.sampling == false)
{
// 开始本时段采样
clipNormalizedTime.sampling = true;
for (int i = 0; i < _rawSamples.Count; ++i)
{
SamplePointData.pool.Collect(_rawSamples[i]);
}
_rawSamples.Clear();
}
}
else
{
// 离开指定动画进度
if (clipNormalizedTime.sampling)
{
// 停止采样
clipNormalizedTime.sampling = false;
}
continue;
}
// 添加原始样本
SamplePointData raw = SamplePointData.pool.Get();
raw.pos = trail.transform.position;
raw.forward = trail.transform.forward;
raw.right = trail.transform.right;
raw.sampleTimer = Time.timeSinceLevelLoad;
_rawSamples.Add(raw);
// 平滑插值处理
MakeSmooth(/*Mathf.InverseLerp(clipNormalizedTime.startNormalizedTime,
* clipNormalizedTime.stopNormalizedTime, normalizedTime)*/interpolationMode);
}
}
/// <summary>
/// 依据采样点构建trail对象的mesh
/// </summary>
void BuildTrailMesh()
{
if (_samples.Count == 0)
{
return;
}
// 移除超期样本
while (_samples.Count > 0 &&
Time.timeSinceLevelLoad > _samples[_samples.Count - 1].sampleTimer + sampleLife)
{
SamplePointData.pool.Collect(_samples[_samples.Count - 1]);
_samples.RemoveAt(_samples.Count - 1);
}
if (_samples.Count <= 1)
{
_meshFilter.mesh.Clear();
return;
}
Vector3[] vertices = new Vector3[_samples.Count * (isStab ? 3 : 2)];
Vector2[] uv = new Vector2[_samples.Count * (isStab ? 3 : 2)];
// Use matrix instead of transform.TransformPoint for performance reasons
Matrix4x4 localSpaceTransform = trail.transform.worldToLocalMatrix;
// 创建顶点、UV
for (var i = 0; i < _samples.Count; i++)
{
SamplePointData sample = _samples[i];
if (isStab)
{
// 一个样本创建三个顶点: 刃面中心，刃宽左侧，刃宽右侧
vertices[i * 3 + 0] = localSpaceTransform.MultiplyPoint(sample.pos);
vertices[i * 3 + 1] = localSpaceTransform.MultiplyPoint(sample.pos -
sample.right * trailWidth * 0.5f);
vertices[i * 3 + 2] = localSpaceTransform.MultiplyPoint(sample.pos +
sample.right * trailWidth * 0.5f);
// 一个样本创建三个UV
float u = 0.0f;
if (i != 0)
{
u = Mathf.Clamp01((Time.timeSinceLevelLoad - sample.sampleTimer) / sampleLife);
}
uv[i * 3 + 0] = new Vector2(u, 0);
uv[i * 3 + 1] = new Vector2(u, 1);
uv[i * 3 + 2] = new Vector2(u, 1);
}
else
{
// 一个样本创建两个顶点: 刃面中心，刃长底端
vertices[i * 2 + 0] = localSpaceTransform.MultiplyPoint(sample.pos);
vertices[i * 2 + 1] = localSpaceTransform.MultiplyPoint(sample.pos - sample.forward * trailWidth);
// 一个样本创建两个UV
float u = 0.0f;
if (i != 0)
{
u = Mathf.Clamp01((Time.timeSinceLevelLoad - sample.sampleTimer) / sampleLife);
}
uv[i * 2 + 0] = new Vector2(u, 0);
uv[i * 2 + 1] = new Vector2(u, 1);
}
}
// 创建三角形
int triangleCount = (_samples.Count - 1) * 2 * (isStab ? 2 : 1); // 三角形数量
int trianglesVerticeCount = triangleCount * 3; // 三角形顶点数量
int[] triangles = new int[trianglesVerticeCount];
int groupCount = triangles.Length / (6 * (isStab ? 2 : 1));
for (int i = 0; i < groupCount; i++)
{
if (isStab)
{
triangles[i * 12 + 0] = i * 3;
triangles[i * 12 + 1] = i * 3 + 1;
triangles[i * 12 + 2] = i * 3 + 3;
triangles[i * 12 + 3] = i * 3;
triangles[i * 12 + 4] = i * 3 + 3;
triangles[i * 12 + 5] = i * 3 + 2;
triangles[i * 12 + 6] = i * 3 + 3;
triangles[i * 12 + 7] = i * 3 + 1;
triangles[i * 12 + 8] = i * 3 + 4;
triangles[i * 12 + 9] = i * 3 + 3;
triangles[i * 12 + 10] = i * 3 + 5;
triangles[i * 12 + 11] = i * 3 + 1;
}
else
{
triangles[i * 6 + 0] = i * 2;
triangles[i * 6 + 1] = i * 2 + 1;
triangles[i * 6 + 2] = i * 2 + 2;
triangles[i * 6 + 3] = i * 2 + 2;
triangles[i * 6 + 4] = i * 2 + 1;
triangles[i * 6 + 5] = i * 2 + 3;
}
}
MeshTools.Instance.MakeMesh(_meshFilter, vertices, triangles, uv);
}
public static void Reset(SamplePointData data)
{
data.Reset();
}