/// <summary>
/// Get a point on the spline in world space.
/// </summary>
/// <param name="pos">Position on the spline, in the range [0, 1].</param>
/// <returns>The world space point on the spline.</returns>
public Vector3 GetWorldPoint(float pos)
{
return(transform.TransformPoint(spline.GetPoint(pos)));
}
private void AddVertexDataDeformed(
SplineData spline, Mesh mesh, StretchMode stretch, AlignMode align,
float stretchFactor, float meshStart, float minZ, Vector3 center,
List <Vector3> vertices, List <Vector3> normals, List <Vector2> uvs)
{
Vector3[] inVerts = mesh.vertices;
Vector3[] inNormals = mesh.normals;
Vector2[] inUvs = uvs != null ? mesh.uv : null;
float centerPos = Mathf.Clamp01(meshStart + (center.z - minZ) / spline.length);
var centerRotation = spline.GetRotation(centerPos);
if (align == AlignMode.ForceUpright)
{
centerRotation = Quaternion.Euler(0, centerRotation.eulerAngles.y, 0);
}
else if (align == AlignMode.NoRotation)
{
centerRotation = Quaternion.identity;
}
Vector3 centerOffset = spline.GetPoint(centerPos) + (centerRotation * Vector3.forward * minZ);
Matrix4x4 alignMatrix = Matrix4x4.TRS(centerOffset, centerRotation, Vector3.one);
for (int i = 0; i < inVerts.Length; i++)
{
var vert = inVerts[i];
var normal = inNormals[i];
var uv = Vector2.zero;
if (inUvs != null && inUvs.Length > i)
{
uv = inUvs[i];
}
vert.z -= minZ;
if ((stretch & StretchMode.Mesh) == StretchMode.Mesh)
{
vert.z *= stretchFactor;
}
if (align == AlignMode.Deform)
{
float pos = Mathf.Clamp01(meshStart + (vert.z / spline.length));
var srot = spline.GetRotation(pos);
var spos = spline.GetPoint(pos);
vert = spos + (srot * Vector3.ProjectOnPlane(vert, Vector3.forward));
normal = srot * normal;
}
else
{
vert = alignMatrix.MultiplyPoint(vert);
normal = alignMatrix.MultiplyVector(normal);
}
vertices.Add(vert);
normals.Add(normal);
if (uvs != null)
{
uvs.Add(uv);
}
}
}