Mesh Generate::line(const vector<VectorF> &linePointsIn, TextureDescriptor texture, Color color,
float lineWidth)
{
if(linePointsIn.size() < 2) // if less than 2 points then we can't have a line
{
return Mesh(new Mesh_t());
}
vector<VectorF> linePoints;
linePoints.reserve(linePointsIn.size());
linePoints.push_back(linePointsIn[0]);
for(size_t i = 1; i < linePointsIn.size(); i++)
{
if(absSquared(linePointsIn[i] - linePoints.back()) >= eps * eps) // remove duplicates
linePoints.push_back(linePointsIn[i]);
}
if(linePoints.size() < 2) // if less than 2 points then we can't have a line
{
return Mesh(new Mesh_t());
}
vector<Edge> edges;
edges.reserve(linePoints.size());
float distance = 0;
edges.push_back(makeStartEdge(linePoints[0], linePoints[1], distance, lineWidth));
distance += abs(linePoints[1] - linePoints[0]);
for(size_t i = 2; i < linePoints.size(); i++)
{
edges.push_back(makeMiddleEdge(linePoints[i - 2], linePoints[i - 1], linePoints[i], distance, lineWidth));
distance += abs(linePoints[i - 1] - linePoints[i]);
}
edges.push_back(makeEndEdge(linePoints[linePoints.size() - 2], linePoints[linePoints.size() - 1], distance, lineWidth));
Mesh retval = nullptr;
for(size_t i = 1; i < edges.size(); i++)
{
TextureDescriptor currentTexture = texture.subTexture(edges[i - 1].distance / distance, edges[i].distance / distance, 0, 1);
Mesh mesh = Generate::quadrilateral(currentTexture, edges[i - 1].p2, color, edges[i].p2, color, edges[i].p1, color, edges[i - 1].p1, color);
if(retval == nullptr)
retval = mesh;
else
retval->add(mesh);
}
return retval;
}
