1 files changed, 31 insertions, 0 deletions
diff --git a/include/components/physics.hpp b/include/components/physics.hpp
new file mode 100644
index 0000000..8e462a9
--- /dev/null
+++ b/include/components/physics.hpp
@@ -0,0 +1,31 @@
+#ifndef COMPONENTS_PHYSICS_HPP_
+#define COMPONENTS_PHYSICS_HPP_
+
+#include "base.hpp"
+
+/**
+ * @struct Physics
+ * @brief Allows and entity to react to gravity and frictions.
+ * When an entity inherits this component it will react with gravity and move with friction.
+ */
+struct Physics : public Component {
+	/**
+	 * Constructor that sets the gravity constant, if not specified it becomes 0.
+	 * @param g The non default gravity constant.
+	 */
+	Physics(float g = 0.2f): g(g) {}
+	Physics(XMLElement* imp, XMLElement* def) {
+		fromXML(imp, def);
+	}
+
+	float g; /**< The gravity constant, how fast the object falls */
+
+	void fromXML(XMLElement* imp, XMLElement* def) final {
+		if (imp->QueryFloatAttribute("gravity", &g) != XML_NO_ERROR) {
+			if (def->QueryFloatAttribute("value", &g) != XML_NO_ERROR)
+				g = 0.2f;
+		}
+	}
+};
+
+#endif // COMPONENTS_PHYSICS_HPP_