Exemple #1
0
        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
        }
Exemple #2
0
        public void EndBorderPart()
        {
            //add to list
            BorderPart borderPart = new BorderPart();

            borderPart.beginAtBorderSetIndex = _currentBorderPartBeginAt;
            borderPart.count = smoothBorders.Count - _currentBorderPartBeginAt;
            _borderParts.Add(borderPart);
        }