1 files changed, 89 insertions, 0 deletions
diff --git a/DumpSource.cpp b/DumpSource.cpp
new file mode 100644
index 0000000..9c913d0
--- /dev/null
+++ b/DumpSource.cpp
@@ -0,0 +1,89 @@
+#include "DumpSource.h"
+
+#include <cmath>
+#include <vector>
+#include <utility>
+
+#include <nlohmann/json.hpp>
+#include <raylib.h>
+
+#include "Grid.h"
+#include "Killmail.h"
+#include "LongVector3.h"
+
+
+using json = nlohmann::json;
+
+
+static constexpr long double SCALE {.0001};
+static constexpr long double EXTENT {1000 * 50000};
+
+
+static Grid& find_grid_for(std::vector<Grid>& grids, const LongVector3& original);
+
+
+DumpSource::DumpSource(const char* filename) :
+    m_grids {}
+{
+    if (!FileExists(filename))
+        throw "File does not exist";
+    char* text = LoadFileText(filename);
+    auto dump = json::parse(text);
+    for (const auto& info : dump["killmails"]) {
+        Killmail km;
+        km.original = {
+            info["victim"]["position"]["x"].get<long double>(),
+            info["victim"]["position"]["y"].get<long double>(),
+            info["victim"]["position"]["z"].get<long double>(),
+        };
+        auto& grid = find_grid_for(m_grids, km.original);
+        grid.killmails.push_back(std::move(km));
+    }
+    UnloadFileText(text);
+    for (auto& grid : m_grids) {
+        LongVector3 average {0, 0, 0};
+        for (const auto& km : grid.killmails) {
+            average.x += km.original.x;
+            average.y += km.original.y;
+            average.z += km.original.z;
+        }
+        const auto killmails = grid.killmails.size();
+        average.x /= killmails;
+        average.y /= killmails;
+        average.z /= killmails;
+        for (auto& km : grid.killmails) {
+            km.position = {
+                static_cast<float>((km.original.x - average.x) * SCALE),
+                static_cast<float>((km.original.y - average.y) * SCALE),
+                static_cast<float>((km.original.z - average.z) * SCALE),
+            };
+        }
+        grid.origin = average;
+    }
+}
+
+
+std::vector<Grid>
+DumpSource::grids() const
+{
+    return m_grids;
+}
+
+
+Grid&
+find_grid_for(std::vector<Grid>& grids, const LongVector3& original)
+{
+    for (auto& grid : grids) {
+        for (auto& km : grid.killmails) {
+            const long double dist =
+                std::sqrt(
+                    std::pow(original.x - km.original.x, 2) +
+                    std::pow(original.y - km.original.y, 2) +
+                    std::pow(original.z - km.original.z, 2));
+            if (dist < EXTENT)
+                return grid;
+        }
+    }
+    grids.push_back(Grid{});
+    return grids.back();
+}