add pathfinding start/end selection

1 files changed, 34 insertions, 0 deletions

diff --git a/PathfindingContext.cpp b/PathfindingContext.cpp
new file mode 100644
index 0000000..a1d31f6
--- /dev/null
+++ b/PathfindingContext.cpp
@@ -0,0 +1,34 @@
+#include "PathfindingContext.h"
+#include "Museum.h"
+#include "NullTileBehavior.h"
+
+using namespace std;
+
+PathfindingContext::PathfindingContext(Museum & m) : museum(m) {}
+
+void PathfindingContext::set_start(const pair<int, int> & point) {
+	if (!this->valid_point(point)) return;
+	this->start_point = point;
+}
+
+void PathfindingContext::set_end(const pair<int, int> & point) {
+	if (!this->valid_point(point)) return;
+	this->end_point = point;
+}
+
+bool PathfindingContext::valid_point(const std::pair<int, int> & point) {
+	// check if out of bounds
+	Canvas & canvas = this->museum.canvas;
+	if (point.first < 0) return false;
+	if (point.second < 0) return false;
+	if (point.first >= canvas.data.columns) return false;
+	if (point.second >= canvas.data.rows) return false;
+
+	// check if square is empty (has null behavior)
+	Tile & tile = canvas.get_tile(point.first, point.second);
+	TileBehavior * behavior = tile.behavior.get();
+	if (dynamic_cast<NullTileBehavior *>(behavior) != nullptr) return false;
+
+	return true;
+}
+