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make sure we don't encode the first vertex twice

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This commit is contained in:
Konstantin Käfer
2014-02-13 17:19:49 +01:00
parent 1cab7f07bd
commit 2f32d1585d
1 changed files with 13 additions and 2 deletions
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15
src/renderer/fill_bucket.cpp
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@@ -51,9 +51,17 @@ void FillBucket::addGeometry(pbf& geom) {
void FillBucket::addGeometry(const std::vector<Coordinate>& line) {
uint32_t vertex_start = vertexBuffer->index();
for (const Coordinate& coord : line) {
size_t length = line.size();
// Don't add the first vertex twice.
if (line.front() == line.back()) --length;
for (size_t i = 0; i < length; i++) {
const Coordinate& coord = line[i];
vertexBuffer->add(coord.x, coord.y);
}
size_t vertex_end = vertexBuffer->index();
size_t vertex_count = vertex_end - vertex_start;
@@ -93,8 +101,11 @@ void FillBucket::addGeometry(const std::vector<Coordinate>& line) {
lineElementsBuffer->add(index + i - 1, index + i);
}
// Add a line from the last vertex to the first vertex.
lineElementsBuffer->add(index + vertex_count - 1, index);
group.vertex_length += vertex_count;
group.elements_length += (vertex_count - 1);
group.elements_length += vertex_count;
}
}