started work on CompoundShape

src/CompoundShape.cpp

@@ -0,0 +1,24 @@
+#include "CompoundShape.hpp"
+
+// constructors
+
+CompoundShape::CompoundShape(const std::vector<Shape> shapes)
+    : shapes { shapes }
+    , transform { 1.0f } {
+
+    for (auto& shape : this->shapes) {
+        shape.init();
+    }
+}
+
+// public
+
+void CompoundShape::draw() {
+    for (auto& shape : this->shapes) {
+        glm::mat4 orig_transform { shape.transform };
+        shape.transform *= shape.transform;
+        shape.draw();
+        shape.transform = orig_transform;
+    }
+}
+