More QuadTree code.

[ipdf/code.git] / src / quadtree.cpp

diff --git a/src/quadtree.cpp b/src/quadtree.cpp
index 9ba2cee..e93a0f0 100644 (file)
--- a/src/quadtree.cpp
+++ b/src/quadtree.cpp
@@ -39,6 +39,17 @@ Rect TransformFromQuadChild(const Rect& src, QuadTreeNodeChildren child_type)
        return dst;
 }
 
+bool ContainedInQuadChild(const Rect& src, QuadTreeNodeChildren child_type)
+{
+       Rect std = {0,0,1,1};
+       Rect dst = TransformFromQuadChild(std, child_type);
+       if (src.x + src.w < dst.x) return false;
+       if (src.y + src.h < dst.y) return false;
+       if (src.x > dst.x + dst.w) return false;
+       if (src.y > dst.y + dst.h) return false;
+       return true;
+}
+
 }
 
 #endif