Major refactoring - internal server state machine implemented

src/SparkEmitter.h

@@ -51,13 +51,13 @@ namespace FRG {
 		std::string shaderProgramName;
 
 		// Sparks spawn within this radius of each emission point. 0 means
-		// "spawn exactly at the point" (legacy behavior).
+		// "spawn exactly at the point" (old behavior).
 		float emissionRadius;
 
 		bool configured;
 		// Rebuilds the CPU-side quad/UV arrays. If cameraViewMatrix is identity,
 		// particles are rendered as axis-aligned quads in world XY and sorted by
-		// world Z (legacy behavior). Otherwise quads are billboarded toward the
+		// world Z (old behavior). Otherwise quads are billboarded toward the
 		// camera using its world-space right/up axes, and particles are sorted
 		// back-to-front in eye space for correct alpha blending.
 		void prepareDrawData(const Eigen::Matrix4f& cameraViewMatrix);
@@ -106,7 +106,7 @@ namespace FRG {
 		// Вызывать ДО draw() в начале кадра: готовит данные и загружает в VBO.
 		// Pass the current camera view matrix (world → eye) to billboard sparks
 		// toward the camera and sort them back-to-front. Identity (default)
-		// keeps the legacy non-billboarded behavior.
+		// keeps the old non-billboarded behavior.
 		void prepareForDraw(const Eigen::Matrix4f& cameraViewMatrix = Eigen::Matrix4f::Identity());
 
 		void draw(Renderer& renderer, float zoom, int screenWidth, int screenHeight);