private void TraversePositions(PositionArray positions, float px, float py, float dir, bool first)
{
SizeF ef1 = positions.CellSize;
int num1 = positions.GetDist(px, py);
float single1 = px;
float single2 = py;
float single3 = single1;
float single4 = single2;
if (dir == 0f)
{
single3 += ef1.Width;
}
else if (dir == 90f)
{
single4 += ef1.Height;
}
else if (dir == 180f)
{
single3 -= ef1.Width;
}
else
{
single4 -= ef1.Height;
}
while ((num1 > 1) && (positions.GetDist(single3, single4) == (num1 - 1)))
{
single1 = single3;
single2 = single4;
if (dir == 0f)
{
single3 += ef1.Width;
}
else if (dir == 90f)
{
single4 += ef1.Height;
}
else if (dir == 180f)
{
single3 -= ef1.Width;
}
else
{
single4 -= ef1.Height;
}
num1--;
}
if (first)
{
if (num1 > 1)
{
if ((dir == 180f) || (dir == 0f))
{
single1 = (((float)System.Math.Floor((double)(single1 / ef1.Width))) * ef1.Width) + (ef1.Width / 2f);
}
else
{
single2 = (((float)System.Math.Floor((double)(single2 / ef1.Height))) * ef1.Height) + (ef1.Height / 2f);
}
}
}
else
{
single1 = (((float)System.Math.Floor((double)(single1 / ef1.Width))) * ef1.Width) + (ef1.Width / 2f);
single2 = (((float)System.Math.Floor((double)(single2 / ef1.Height))) * ef1.Height) + (ef1.Height / 2f);
}
if (num1 > 1)
{
float single5 = dir;
float single6 = single1;
float single7 = single2;
if (dir == 0f)
{
single5 = 90f;
single7 += ef1.Height;
}
else if (dir == 90f)
{
single5 = 180f;
single6 -= ef1.Width;
}
else if (dir == 180f)
{
single5 = 270f;
single7 -= ef1.Height;
}
else if (dir == 270f)
{
single5 = 0f;
single6 += ef1.Width;
}
if (positions.GetDist(single6, single7) == (num1 - 1))
{
this.TraversePositions(positions, single6, single7, single5, false);
}
else
{
float single8 = single1;
float single9 = single2;
if (dir == 0f)
{
single5 = 270f;
single9 -= ef1.Height;
}
else if (dir == 90f)
{
single5 = 0f;
single8 += ef1.Width;
}
else if (dir == 180f)
{
single5 = 90f;
single9 += ef1.Height;
}
else if (dir == 270f)
{
single5 = 180f;
single8 -= ef1.Width;
}
if (positions.GetDist(single8, single9) == (num1 - 1))
{
this.TraversePositions(positions, single8, single9, single5, false);
}
}
}
base.AddPoint(single1, single2);
}
public void PrimitiveStructure(out VertexPositionColorTexture[] vertices, out short[] indeces)
{
List <VertexPositionColorTexture> vertexList = new List <VertexPositionColorTexture>();
List <short> indexList = new List <short>();
//Cut down a bit on boilerplate by adding a method
void AddVertexIndex(Vector2 position, Vector2 TextureCoords)
{
indexList.Add((short)vertexList.Count);
vertexList.Add(new VertexPositionColorTexture(new Vector3(position - Main.screenPosition, 0), Color, TextureCoords));
}
//Check if the array is not too small first
if (PositionArray.Length >= (TaperingType == StripTaperType.TaperBoth ? 3 : 2))
{
//Iterate through the given array of positions
for (int i = 0; i < PositionArray.Length - 1; i++)
{
int start = 0;
int end = PositionArray.Length - 2;
float progress = (i + 1) / (float)PositionArray.Length;
//Modify width of the triangles based on progress through iterating through the array
float widthModifier = 1;
switch (TaperingType)
{
case StripTaperType.TaperStart:
widthModifier *= progress;
break;
case StripTaperType.TaperEnd:
widthModifier *= (1 - progress);
break;
case StripTaperType.TaperBoth:
progress = (i + 1) / (float)(PositionArray.Length - 1);
widthModifier *= (float)Math.Pow(1 - (Math.Abs(progress - 0.5f) * 2), 0.5f);
break;
}
if (WidthDelegate != null)
{
widthModifier *= WidthDelegate.Invoke(progress);
}
//If on the first element of the array, add the vertices corresponding to the front of the trail
if (i == start)
{
Vector2 currentPosition = PositionArray[i];
if (TaperingType == StripTaperType.TaperStart || TaperingType == StripTaperType.TaperBoth) //Only add the center point if set to taper at the start
{
AddVertexIndex(currentPosition, new Vector2(0.5f, 0));
}
else
{
Vector2 currentWidthUnit = CurveNormal(PositionArray.ToList(), i);
float startWidth = WidthDelegate == null ? 1 : WidthDelegate.Invoke(0);
Vector2 currentLeft = currentPosition - (currentWidthUnit * Width * startWidth);
Vector2 currentRight = currentPosition + (currentWidthUnit * Width * startWidth);
AddVertexIndex(currentRight, new Vector2(1, 0));
AddVertexIndex(currentLeft, new Vector2(0, 0));
}
}
Vector2 nextPosition = PositionArray[i + 1];
if (i == end && (TaperingType == StripTaperType.TaperEnd || TaperingType == StripTaperType.TaperBoth)) //Only add the center point if set to taper at the end
{
AddVertexIndex(nextPosition, new Vector2(0.5f, 1));
}
else //Add vertices based on the next position of the array
{
Vector2 nextWidthUnit = CurveNormal(PositionArray.ToList(), i + 1);
Vector2 nextLeft = nextPosition - (nextWidthUnit * Width * widthModifier);
Vector2 nextRight = nextPosition + (nextWidthUnit * Width * widthModifier);
//Needs to be in opposite order with this tapering type to avoid backwards facing primitives
if (TaperingType == StripTaperType.TaperBoth)
{
AddVertexIndex(nextLeft, new Vector2(0, progress));
AddVertexIndex(nextRight, new Vector2(1, progress));
}
else
{
AddVertexIndex(nextRight, new Vector2(1, progress));
AddVertexIndex(nextLeft, new Vector2(0, progress));
}
}
}
}
vertices = vertexList.ToArray();
indeces = indexList.ToArray();
}