C++ (Cpp) clippedCircleXRange示例

示例#1

void PolygonShape::getExcludedIntervals(LayoutUnit logicalTop, LayoutUnit logicalHeight, SegmentList& result) const
{
    float y1 = logicalTop;
    float y2 = logicalTop + logicalHeight;

    if (m_polygon.isEmpty() || !m_polygon.boundingBox().overlapsYRange(y1 - shapeMargin(), y2 + shapeMargin()))
        return;

    Vector<const FloatPolygonEdge*> overlappingEdges;
    if (!m_polygon.overlappingEdges(y1 - shapeMargin(), y2 + shapeMargin(), overlappingEdges))
        return;

    FloatShapeInterval excludedInterval;
    for (unsigned i = 0; i < overlappingEdges.size(); i++) {
        const FloatPolygonEdge& edge = *(overlappingEdges[i]);
        if (!shapeMargin())
            excludedInterval.unite(OffsetPolygonEdge(edge, FloatSize()).clippedEdgeXRange(y1, y2));
        else {
            excludedInterval.unite(OffsetPolygonEdge(edge, outwardEdgeNormal(edge) * shapeMargin()).clippedEdgeXRange(y1, y2));
            excludedInterval.unite(OffsetPolygonEdge(edge, inwardEdgeNormal(edge) * shapeMargin()).clippedEdgeXRange(y1, y2));
            excludedInterval.unite(clippedCircleXRange(edge.vertex1(), shapeMargin(), y1, y2));
        }
    }

    if (!excludedInterval.isEmpty())
        result.append(LineSegment(excludedInterval.x1(), excludedInterval.x2()));
}

示例#2

文件： PolygonShape.cpp 项目： darktears/blink-crosswalk

LineSegment PolygonShape::getExcludedInterval(LayoutUnit logicalTop, LayoutUnit logicalHeight) const
{
    float y1 = logicalTop.toFloat();
    float y2 = logicalTop.toFloat() + logicalHeight.toFloat();

    if (m_polygon.isEmpty() || !overlapsYRange(m_polygon.boundingBox(), y1 - shapeMargin(), y2 + shapeMargin()))
        return LineSegment();

    Vector<const FloatPolygonEdge*> overlappingEdges;
    if (!m_polygon.overlappingEdges(y1 - shapeMargin(), y2 + shapeMargin(), overlappingEdges))
        return LineSegment();

    FloatShapeInterval excludedInterval;
    for (unsigned i = 0; i < overlappingEdges.size(); i++) {
        const FloatPolygonEdge& edge = *(overlappingEdges[i]);
        if (edge.maxY() == edge.minY())
            continue;
        if (!shapeMargin()) {
            excludedInterval.unite(OffsetPolygonEdge(edge, FloatSize()).clippedEdgeXRange(y1, y2));
        } else {
            excludedInterval.unite(OffsetPolygonEdge(edge, outwardEdgeNormal(edge) * shapeMargin()).clippedEdgeXRange(y1, y2));
            excludedInterval.unite(OffsetPolygonEdge(edge, inwardEdgeNormal(edge) * shapeMargin()).clippedEdgeXRange(y1, y2));
            excludedInterval.unite(clippedCircleXRange(edge.vertex1(), shapeMargin(), y1, y2));
        }
    }

    if (excludedInterval.isEmpty())
        return LineSegment();

    return LineSegment(excludedInterval.x1(), excludedInterval.x2());
}