public void FillTriangles(MultiPartTessResult multipartTessResult, int index, Drawing.Color color)
{
SetCurrent();
CheckViewMatrix();
//--------------------------------------------
u_solidColor.SetValue((float)color.R / 255f, (float)color.G / 255f, (float)color.B / 255f, (float)color.A / 255f);
//--------------------------------------------
//note (A):
//from https://www.khronos.org/registry/OpenGL-Refpages/es2.0/xhtml/glVertexAttribPointer.xml
//... If a non-zero named buffer object is bound to the GL_ARRAY_BUFFER target (see glBindBuffer)
//while a generic vertex attribute array is specified,
//pointer is treated as **a byte offset** into the buffer object's data store.
VertexBufferObject vbo = multipartTessResult.GetVBO();
int subPathCount = multipartTessResult.PartCount;
vbo.Bind();
PartRange p = multipartTessResult.GetPartRange(index);
a_position.LoadLatest(p.beginVertexAt * 4); //*4 => see note (A) above, so offset => beginVertexAt * sizeof(float)
GL.DrawElements(BeginMode.Triangles,
p.elemCount,
DrawElementsType.UnsignedShort,
p.beginElemIndexAt * 2); //*2 => see note (A) above, so offset=> beginElemIndexAt *sizeof(ushort)
vbo.UnBind();
}
/// <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();
}
public void DrawTriangleStrips(MultiPartTessResult multipartTessResult, int index, PixelFarm.Drawing.Color color)
{
////note (A):
////from https://www.khronos.org/registry/OpenGL-Refpages/es2.0/xhtml/glVertexAttribPointer.xml
////... If a non-zero named buffer object is bound to the GL_ARRAY_BUFFER target (see glBindBuffer)
////while a generic vertex attribute array is specified,
////pointer is treated as **a byte offset** into the buffer object's data store.
SetCurrent();
CheckViewMatrix();
//--------------------
u_solidColor.SetValue((float)color.R / 255f, (float)color.G / 255f, (float)color.B / 255f, (float)color.A / 255f);
_shareRes.AssignStrokeColorToVar(u_solidColor);
//because original stroke width is the width of both side of
//the line, but u_linewidth is the half of the strokeWidth
u_linewidth.SetValue(_shareRes._strokeWidth / 2f);
//--------------------
VertexBufferObject borderVBO = multipartTessResult.GetBorderVBO();
borderVBO.Bind();
BorderPart p = multipartTessResult.GetBorderPartRange(index);
//get part range from border part
int borderSetIndex = p.beginAtBorderSetIndex;
for (int i = 0; i < p.count; ++i)
{
PartRange borderset = multipartTessResult.GetSmoothBorderPartRange(borderSetIndex + i);
a_position.LoadLatest(borderset.beginVertexAt * 4);
GL.DrawArrays(BeginMode.TriangleStrip, 0, borderset.elemCount);
}
borderVBO.UnBind(); //unbind
}
public MultiPartTessResult CreateMultiPartTessResult(MultiPartPolygon multipartPolygon)
{
//store internal gfx path inside render vx
MultiPartTessResult multipartTessResult = new MultiPartTessResult();
_igfxPathBuilder.CreateGraphicsPathForMultiPartRenderVx(multipartPolygon,
multipartTessResult,
_glsx.GetTessTool(),
_glsx.GetSmoothBorderBuilder());
//
return(multipartTessResult);
}
public void dbugDrawTriangleStrips(MultiPartTessResult multipartTessResult)
{
////backup
//System.Collections.Generic.List<SmoothBorderSet> borderSets = multipartTessResult.GetAllSmoothBorderSet();
//int j = borderSets.Count;
//for (int i = 0; i < j; ++i)
//{
// SmoothBorderSet borderSet = borderSets[i];
// DrawTriangleStrips(
// borderSet.smoothBorderArr,
// borderSet.vertexStripCount);
//}
}
void FillGfxPath(Drawing.Color color, MultiPartTessResult multipartTessResult, int index)
{
switch (SmoothMode)
{
case SmoothMode.No:
{
float saved_Width = StrokeWidth;
Drawing.Color saved_Color = StrokeColor;
//temp set stroke width to 2 amd stroke color
//to the same as bg color (for smooth border).
//and it will be set back later.
//
StrokeColor = color;
StrokeWidth = 1.2f; //TODO: review this ***
basicFillShader.FillTriangles(multipartTessResult, index, color);
//restore stroke width and color
StrokeWidth = saved_Width; //restore back
StrokeColor = saved_Color;
}
break;
case SmoothMode.Smooth:
{
float saved_Width = StrokeWidth;
Drawing.Color saved_Color = StrokeColor;
//temp set stroke width to 2 amd stroke color
//to the same as bg color (for smooth border).
//and it will be set back later.
//
StrokeColor = color;
StrokeWidth = 1.2f; //TODO: review this ***
basicFillShader.FillTriangles(multipartTessResult, index, color);
//add smooth border
smoothLineShader.DrawTriangleStrips(multipartTessResult, index, color);
//restore stroke width and color
StrokeWidth = saved_Width; //restore back
StrokeColor = saved_Color;
}
break;
}
}
internal void CreateGraphicsPathForMultiPartRenderVx(
MultiPartPolygon multipartPolygon,
MultiPartTessResult multipartTessResult,
TessTool tessTool,
SmoothBorderBuilder borderBuilder)
{
//a multipart polygon contains a list of expand coord (x,y) set.
List <float[]> expandCoordsList = multipartPolygon.expandCoordsList;
List <int[]> endPointList = multipartPolygon.contourEndPoints;
int listCount = expandCoordsList.Count;
for (int i = 0; i < listCount; ++i)
{
//expand x,y
float[] expandCoords = expandCoordsList[i];
int[] endPoints = endPointList[i];
//area
int localVertexCount;
tessTool.TessAndAddToMultiPartResult(expandCoords,
endPoints,
multipartTessResult,
out localVertexCount);
//borders
//build smooth border
int m = endPoints.Length;
int latest_endPoint = 0;
multipartTessResult.BeginBorderPart();
for (int n = 0; n < m; ++n)
{
int endPoint = endPoints[n]; //'x' , not include 'y'
int len = (endPoint - latest_endPoint) + 1; //so len we add +1 for 'y'
int borderTriangleStripCount;
//expand coords for draw array
float[] smoothBorderXYs = borderBuilder.BuildSmoothBorders(expandCoords, latest_endPoint, len, out borderTriangleStripCount);
latest_endPoint += len + 2;
multipartTessResult.AddSmoothBorders(smoothBorderXYs, borderTriangleStripCount);
}
multipartTessResult.EndBorderPart();
}
}
public void DrawTriangleStrips(MultiPartTessResult multipartTessResult)
{
throw new NotSupportedException();
}
public GLRenderVx(MultiPartTessResult multipartTessResult)
{
this.multipartTessResult = multipartTessResult;
}
internal InternalGraphicsPath(MultiPartTessResult _mutltiPartTess)
{
this._figure = null;
this.figures = null;
this._mutltiPartTess = _mutltiPartTess;
}
internal InternalGraphicsPath(Figure fig)
{
this.figures = null;
this._mutltiPartTess = null;
_figure = fig;
}
internal InternalGraphicsPath(List <Figure> figures)
{
_figure = null;
_mutltiPartTess = null;
this.figures = figures;
}
public void FillRenderVx(Drawing.Color color, MultiPartTessResult multiPartTessResult, int index)
{
FillGfxPath(color, multiPartTessResult, index);
}