/// <summary>
/// tess and read result as triangle list index array (for GLES draw element)
/// </summary>
/// <param name="tessTool"></param>
/// <param name="vertex2dCoords"></param>
/// <param name="contourEndPoints"></param>
/// <param name="outputCoords"></param>
/// <param name="vertexCount"></param>
/// <returns></returns>
internal static void TessAndAddToMultiPartResult(this TessTool tessTool,
float[] vertex2dCoords,
int[] contourEndPoints,
MultiPartTessResult multipartTessResult,
out int vertexCount)
{
if (!tessTool.TessPolygon(vertex2dCoords, contourEndPoints))
{
vertexCount = 0;
return;
}
//-----------------------------
//results
//1.
List <ushort> indexList = tessTool.TessIndexList;
//2.
List <TessTempVertex> tempVertexList = tessTool.TempVertexList;
//3.
vertexCount = indexList.Count;
//-----------------------------
multipartTessResult.BeginPart();
multipartTessResult.AddTessCoords(vertex2dCoords);
//append with newly create vertex(from tempVertList)
int tempVertListCount = tempVertexList.Count;
for (int i = 0; i < tempVertListCount; ++i)
{
TessTempVertex v = tempVertexList[i];
multipartTessResult.AddTessCoord((float)v.m_X, (float)v.m_Y);
}
multipartTessResult.AddVertexIndexList(indexList);
multipartTessResult.EndPart();
}
/// <summary>
/// tess and read result as triangle list index array (for GLES draw element)
/// </summary>
/// <param name="tessTool"></param>
/// <param name="vertex2dCoords"></param>
/// <param name="contourEndPoints"></param>
/// <param name="outputCoords"></param>
/// <param name="vertexCount"></param>
/// <returns></returns>
public static ushort[] TessAsTriIndexArray(this TessTool tessTool,
float[] vertex2dCoords,
int[] contourEndPoints,
out float[] outputCoords,
out int vertexCount)
{
if (!tessTool.TessPolygon(vertex2dCoords, contourEndPoints))
{
vertexCount = 0;
outputCoords = null;
return(null); //* early exit
}
//results
//1.
List <ushort> indexList = tessTool.TessIndexList;
//2.
List <TessTempVertex> tempVertexList = tessTool.TempVertexList;
//3.
vertexCount = indexList.Count;
//-----------------------------
//create a new array and append with original and new tempVertex list
int tempVertListCount = tempVertexList.Count;
outputCoords = new float[vertex2dCoords.Length + tempVertListCount * 2];
//1. copy original array
Array.Copy(vertex2dCoords, outputCoords, vertex2dCoords.Length);
//2. append with newly create vertex (from tempVertList)
int endAt = vertex2dCoords.Length + tempVertListCount;
int p = 0;
int q = vertex2dCoords.Length; //start adding at
for (int i = vertex2dCoords.Length; i < endAt; ++i)
{
TessTempVertex v = tempVertexList[p];
outputCoords[q] = (float)v.m_X;
outputCoords[q + 1] = (float)v.m_Y;
p++;
q += 2;
}
return(indexList.ToArray());
}
/// <summary>
/// tess and read result as triangle list vertex array (for GLES draw-array)
/// </summary>
/// <param name="tessTool"></param>
/// <param name="vertex2dCoords"></param>
/// <param name="contourEndPoints"></param>
/// <param name="vertexCount"></param>
/// <returns></returns>
public static float[] TessAsTriVertexArray(this TessTool tessTool, float[] vertex2dCoords, int[] contourEndPoints, out int vertexCount)
{
if (!tessTool.TessPolygon(vertex2dCoords, contourEndPoints))
{
vertexCount = 0;
return(null);
}
//results
//1.
List <ushort> indexList = tessTool.TessIndexList;
//2.
List <TessTempVertex> tempVertexList = tessTool.TempVertexList;
//3.
vertexCount = indexList.Count;
//-----------------------------
int orgVertexCount = vertex2dCoords.Length / 2;
float[] vtx = new float[vertexCount * 2];//***
int n = 0;
for (int p = 0; p < vertexCount; ++p)
{
ushort index = indexList[p];
if (index >= orgVertexCount)
{
//extra coord (newly created)
TessTempVertex extraVertex = tempVertexList[index - orgVertexCount];
vtx[n] = (float)extraVertex.m_X;
vtx[n + 1] = (float)extraVertex.m_Y;
}
else
{
//original corrd
vtx[n] = (float)vertex2dCoords[index * 2];
vtx[n + 1] = (float)vertex2dCoords[(index * 2) + 1];
}
n += 2;
}
//triangle list
return(vtx);
}