/// <summary>
/// Get the VectorUv along the curve
/// </summary>
/// <param name="leftStart">The left most point</param>
/// <param name="rightStart">The right most point</param>
/// <param name="far">The far corner</param>
/// <param name="percentage">The percentage along the line to get</param>
/// <returns>The vectorUV point along the line</returns>
private VectorUvs GetBezierCurvePoint(VectorUvs leftStart, VectorUvs rightStart, VectorUvs far, float percentage)
{
VectorUvs partA = VectorUvs.Lerp(leftStart, far, percentage);
VectorUvs partB = VectorUvs.Lerp(far, rightStart, percentage);
VectorUvs target = VectorUvs.Lerp(partA, partB, percentage);
return(target);
}
/// <summary>
/// Gets the lerp of the position and UVS
/// </summary>
/// <param name="leading">The leading strright before the curve starts</param>
/// <param name="far">The far point</param>
/// <param name="startingPercent">the amont to lepr</param>
/// <returns>The new VectorUvs of the lerped position</returns>
public static VectorUvs Lerp(VectorUvs leading, VectorUvs far, float startingPercent)
{
Vector3 leadingVector = leading.Vector;
Vector3 farVector = far.Vector;
Vector2 leadingUV = leading.UV;
Vector2 farUV = far.UV;
VectorUvs uv = new VectorUvs();
uv.Vector = Vector3.Lerp(leadingVector, farVector, startingPercent);
uv.UV = Vector3.Lerp(leadingUV, farUV, startingPercent);
return(uv);
}
/// <summary>
/// Creates a fan list from a smotherCornerContext
/// </summary>
/// <param name="scc">The smother corner context</param>
/// <param name="startingPercent">The starting point along the first lines</param>
/// <param name="sections">The number of sections to use</param>
/// <returns>The list of tris, as a fan list</returns>
protected List <VectorUvs> CreateFanfrom(SmotherCornerContext scc, float startingPercent, int sections)
{
List <VectorUvs> l = new List <VectorUvs>();
// TODO: When starting percent is 0 - are we adding the first poly twice?
l.Add(scc.Main);
l.Add(scc.Leading);
VectorUvs leftStartUV = VectorUvs.Lerp(scc.Leading, scc.Far, startingPercent);
VectorUvs rightStartUV = VectorUvs.Lerp(scc.Ending, scc.Far, startingPercent);
l.Add(leftStartUV);
float sectionsGap = 1.0f / sections;
for (int i = 0; i < sections + 1; i++)
{
l.Add(GetBezierCurvePoint(leftStartUV, rightStartUV, scc.Far, (i * sectionsGap)));
}
l.Add(scc.Ending);
return(l);
}
/// <summary>
/// Draw a fan of tris.
/// </summary>
/// <param name="fanList">The list of verts</param>
protected void DrawFanTriList(List <VectorUvs> fanList)
{
VectorUvs a = fanList[0];
VectorUvs b = fanList[1];
VectorUvs c = fanList[2];
DrawTri(a.Vector, c.Vector, b.Vector,
a.UV,
c.UV,
b.UV);
for (int i = 3; i < fanList.Count; i++)
{
b = c;
c = fanList[i];
DrawTri(a.Vector, c.Vector, b.Vector,
a.UV,
c.UV,
b.UV);
}
}
/// <summary>
/// Draw a afan of tris, starting at the far end
/// </summary>
/// <param name="fanList">The list of verts</param>
protected void DrawFanTriListBackWards(List <VectorUvs> fanList)
{
VectorUvs a = fanList[0];
int count = fanList.Count - 1;
VectorUvs b = fanList[count--];
VectorUvs c = fanList[count--];
DrawTri(a.Vector, c.Vector, b.Vector,
a.UV,
c.UV,
b.UV);
for (int i = 3; i < fanList.Count; i++)
{
b = c;
c = fanList[count--];
DrawTri(a.Vector, c.Vector, b.Vector,
a.UV,
c.UV,
b.UV);
}
}
