diff options
Diffstat (limited to 'src/mbgl/text/get_anchors.cpp')
| -rw-r--r-- | src/mbgl/text/get_anchors.cpp | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/src/mbgl/text/get_anchors.cpp b/src/mbgl/text/get_anchors.cpp index 1a2142bfb2..7a129d692c 100644 --- a/src/mbgl/text/get_anchors.cpp +++ b/src/mbgl/text/get_anchors.cpp @@ -10,14 +10,19 @@ namespace mbgl { Anchors resample(const std::vector<Coordinate> &line, const float offset, const float spacing, const float angleWindowSize, const float maxAngle, const float labelLength, const bool continuedLine, const bool placeAtMiddle) { + const float halfLabelLength = labelLength / 2.0f; + float lineLength = 0; + for (auto it = line.begin(), end = line.end() - 1; it != end; it++) { + lineLength += util::dist<float>(*(it), *(it + 1)); + } + float distance = 0; float markedDistance = offset - spacing; Anchors anchors; - auto end = line.end() - 1; int i = 0; - for (auto it = line.begin(); it != end; it++, i++) { + for (auto it = line.begin(), end = line.end() - 1; it != end; it++, i++) { const Coordinate &a = *(it); const Coordinate &b = *(it + 1); @@ -31,7 +36,12 @@ Anchors resample(const std::vector<Coordinate> &line, const float offset, const x = util::interpolate(float(a.x), float(b.x), t), y = util::interpolate(float(a.y), float(b.y), t); - if (x >= 0 && x < util::EXTENT && y >= 0 && y < util::EXTENT) { + // Check that the point is within the tile boundaries and that + // the label would fit before the beginning and end of the line + // if placed at this point. + if (x >= 0 && x < util::EXTENT && y >= 0 && y < util::EXTENT && + markedDistance - halfLabelLength >= 0.0f && + markedDistance + halfLabelLength <= lineLength) { Anchor anchor(::round(x), ::round(y), angle, 0.5f, i); if (!angleWindowSize || checkMaxAngle(line, anchor, labelLength, angleWindowSize, maxAngle)) { |