diff --git a/exercise3/CMakeLists.txt b/exercise4/CMakeLists.txt
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rename from exercise3/CMakeLists.txt
rename to exercise4/CMakeLists.txt
diff --git a/exercise3/include/AABBTree.h b/exercise4/include/AABBTree.h
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rename from exercise3/include/AABBTree.h
rename to exercise4/include/AABBTree.h
diff --git a/exercise3/include/Box.h b/exercise4/include/Box.h
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rename from exercise3/include/Box.h
rename to exercise4/include/Box.h
diff --git a/exercise3/include/GridTraverser.h b/exercise4/include/GridTraverser.h
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rename from exercise3/include/GridTraverser.h
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diff --git a/exercise3/include/GridUtils.h b/exercise4/include/GridUtils.h
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rename from exercise3/include/GridUtils.h
rename to exercise4/include/GridUtils.h
diff --git a/exercise3/include/HashGrid.h b/exercise4/include/HashGrid.h
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rename to exercise4/include/HashGrid.h
diff --git a/exercise3/include/LineSegment.h b/exercise4/include/LineSegment.h
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rename to exercise4/include/LineSegment.h
diff --git a/exercise3/include/Point.h b/exercise4/include/Point.h
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rename from exercise3/include/Point.h
rename to exercise4/include/Point.h
diff --git a/exercise3/include/Triangle.h b/exercise4/include/Triangle.h
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diff --git a/exercise3/include/Viewer.h b/exercise4/include/Viewer.h
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diff --git a/exercise3/src/AABBTree.cpp b/exercise4/src/AABBTree.cpp
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rename to exercise4/src/AABBTree.cpp
diff --git a/exercise3/src/Box.cpp b/exercise4/src/Box.cpp
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rename from exercise3/src/Box.cpp
rename to exercise4/src/Box.cpp
diff --git a/exercise3/src/GridTraverser.cpp b/exercise4/src/GridTraverser.cpp
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rename from exercise3/src/GridTraverser.cpp
rename to exercise4/src/GridTraverser.cpp
diff --git a/exercise3/src/HashGrid.cpp b/exercise4/src/HashGrid.cpp
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rename from exercise3/src/HashGrid.cpp
rename to exercise4/src/HashGrid.cpp
diff --git a/exercise3/src/LineSegment.cpp b/exercise4/src/LineSegment.cpp
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rename from exercise3/src/LineSegment.cpp
rename to exercise4/src/LineSegment.cpp
diff --git a/exercise3/src/Point.cpp b/exercise4/src/Point.cpp
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rename from exercise3/src/Point.cpp
rename to exercise4/src/Point.cpp
diff --git a/exercise3/src/Triangle.cpp b/exercise4/src/Triangle.cpp
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rename from exercise3/src/Triangle.cpp
rename to exercise4/src/Triangle.cpp
diff --git a/exercise3/src/Viewer.cpp b/exercise4/src/Viewer.cpp
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rename to exercise4/src/Viewer.cpp
diff --git a/exercise3/src/main.cpp b/exercise4/src/main.cpp
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rename to exercise4/src/main.cpp
diff --git a/solution/linux/Exercise3 b/solution/linux/Exercise4
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rename to solution/linux/Exercise4
diff --git a/solution/win/Exercise3.exe b/solution/win/Exercise4.exe
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rename from solution/win/Exercise3.exe
rename to solution/win/Exercise4.exe