public StrokeGenerator() { m_stroker = new StrokeMath(); vertexDistanceList = new VertexDistanceList(); m_out_vertices = new VertexStore(); m_status = StrokeMath.Status.Init; }
public ContourGenerator() { m_stroker = new StrokeMath(); m_width = 1; vertexDistanceList = new VertexDistanceList(); m_out_vertices = new VertexStore(); m_status = StrokeMath.Status.Init; m_src_vertex = 0; m_closed = false; m_orientation = 0; m_auto_detect = false; }
public static void ShortenPath(VertexDistanceList vertexDistanceList, double s, bool closed) { if (s > 0.0 && vertexDistanceList.Count > 1) { double d; int n = (int)(vertexDistanceList.Count - 2); while (n != 0) { d = vertexDistanceList[n].dist; if (d > s) { break; } vertexDistanceList.RemoveLast(); s -= d; --n; } if (vertexDistanceList.Count < 2) { vertexDistanceList.Clear(); } else { n = (int)vertexDistanceList.Count - 1; VertexDistance prev = vertexDistanceList[n - 1]; VertexDistance last = vertexDistanceList[n]; d = (prev.dist - s) / prev.dist; double x = prev.x + (last.x - prev.x) * d; double y = prev.y + (last.y - prev.y) * d; last.x = x; last.y = y; if (!prev.IsEqual(last)) { vertexDistanceList.RemoveLast(); } vertexDistanceList.Close(closed); } } }
public static void ShortenPath(VertexDistanceList vertexDistanceList, double s, bool closed) { if (s > 0.0 && vertexDistanceList.Count > 1) { double d; int n = (int)(vertexDistanceList.Count - 2); while (n != 0) { d = vertexDistanceList[n].dist; if (d > s) break; vertexDistanceList.RemoveLast(); s -= d; --n; } if (vertexDistanceList.Count < 2) { vertexDistanceList.Clear(); } else { n = (int)vertexDistanceList.Count - 1; VertexDistance prev = vertexDistanceList[n - 1]; VertexDistance last = vertexDistanceList[n]; d = (prev.dist - s) / prev.dist; double x = prev.x + (last.x - prev.x) * d; double y = prev.y + (last.y - prev.y) * d; last.x = x; last.y = y; if (!prev.IsEqual(last)) { vertexDistanceList.RemoveLast(); } vertexDistanceList.Close(closed); } } }
//-------------------------------------------------------calc_polygon_area public static double CalculatePolygonArea(VertexDistanceList st) { int i; double sum = 0.0; double x = st[0].x; double y = st[0].y; double xs = x; double ys = y; int j = st.Count; for (i = 1; i < j; i++) { VertexDistance v = st[i]; sum += x * v.y - y * v.x; x = v.x; y = v.y; } return (sum + x * ys - y * xs) * 0.5; }