Streamlined example.

examples/writing/tutorial.cpp

@@ -1,43 +1,32 @@
 #include <pdal/PointView.hpp>
-#include <pdal/BufferReader.hpp>
 #include <pdal/PointTable.hpp>
 #include <pdal/Dimension.hpp>
 #include <pdal/Options.hpp>
 #include <pdal/StageFactory.hpp>
 
 #include <vector>
 
-struct Point
+MyReader : public pdal::Reader
 {
-    double x;
-    double y;
-    double z;
-};
+public:
+    std::string getName() const
+        { return "MyReader"; }
 
-std::vector<Point> getMyData()
-{
-    std::vector<Point> output;
-    Point p;
-
-    for (int i = 0; i < 1000; ++i)
+    virtual void addDimensions(PointLayoutPtr layout)
     {
-        p.x = -93.0 + i*0.001;
-        p.y = 42.0 + i*0.001;
-        p.z = 106.0 + i;
-        output.push_back(p);
+        layout->registerDim(Dimension::Id::X);
+        layout->registerDim(Dimension::Id::Y);
+        layout->registerDim(Dimension::Id::Z);
     }
-    return output;
-}
 
-
-void fillView(pdal::PointViewPtr view, std::vector<Point> const& data)
-{
-    for (int i = 0; i < data.size(); ++i)
+    virtual point_count_t read(PointViewPtr view, point_count_t count)
     {
-        Point const& pt = data[i];
-        view->setField<double>(pdal::Dimension::Id::X, i, pt.x);
-        view->setField<double>(pdal::Dimension::Id::Y, i, pt.y);
-        view->setField<double>(pdal::Dimension::Id::Z, i, pt.z);
+        for (PointId i = 0; i < 1000 && i < count; ++i)
+        {
+            view->setField(Dimension::Id::X, i, -93.0 + i*0.001)
+            view->setField(Dimension::Id::Y, i, 42.0 + i*0.001);
+            view->setField(Dimension::Id::Z, i, 106.0 + i);
+        }
     }
 }
 
@@ -50,25 +39,14 @@ int main(int argc, char* argv[])
     options.add("filename", "myfile.las");
 
     PointTable table;
-    table.layout()->registerDim(Dimension::Id::X);
-    table.layout()->registerDim(Dimension::Id::Y);
-    table.layout()->registerDim(Dimension::Id::Z);
 
-    {
-        PointViewPtr view(new PointView(table));
-
-        std::vector<Point> data = getMyData();
-        fillView(view, data);
-
-        BufferReader *reader = new BufferReader();
-        reader->addView(view);
+    MyReader reader;
+
+    StageFactory factory;
+    Stage *writer = factory.createStage("writers.las");
 
-        StageFactory factory;
-        Stage *writer = factory.createStage("writers.las");
-
-        writer->setInput(*reader);
-        writer->setOptions(options);
-        writer->prepare(table);
-        writer->execute(table);
-    }
+    writer->setInput(reader);
+    writer->setOptions(options);
+    writer->prepare(table);
+    writer->execute(table);
 }