refactor(renderer): clean up debug logging and improve code clarity

- Removed unnecessary debug logging related to frame calls in SCR_DrawScreenField and SCR_UpdateScreen functions, streamlining the rendering process.
- Enhanced readability by clarifying variable declarations and conditions, particularly regarding anaglyph mode checks.
- Added forward declarations for static particle functions in the Vulkan renderer to improve code organization and maintainability.

This commit focuses on improving code clarity and reducing clutter in the rendering logic, contributing to better maintainability.

Author: timfox

src/client/cl_scrn.c

@@ -523,13 +523,6 @@ This will be called twice if rendering in stereo mode
 static void SCR_DrawScreenField( stereoFrame_t stereoFrame ) {
 	qboolean uiFullscreen;
 
-	// Debug: Log when BeginFrame is called (first few times only)
-	static int begin_frame_count = 0;
-	if (begin_frame_count < 3 && com_developer && com_developer->integer) {
-		Com_Printf("DEBUG: SCR_UpdateScreen calling re.BeginFrame (call #%d)\n", ++begin_frame_count);
-	} else {
-		begin_frame_count++;
-	}
 	re.BeginFrame( stereoFrame );
 
 	uiFullscreen = (uivm && VM_Call( uivm, 0, UI_IS_FULLSCREEN ));
@@ -640,23 +633,14 @@ void SCR_UpdateScreen( void ) {
 	// Check if renderer interface is available and properly initialized
 	// This prevents crashes during early startup before CL_InitRef completes
 	extern qboolean re_initialized;
-	extern cvar_t *com_developer;
-	if ( !FS_StartupInProgress() && com_developer && com_developer->integer ) {
-		Com_Printf( "DEBUG: SCR_UpdateScreen called, re_initialized=%d\n", re_initialized );
-	}
 	if ( !re_initialized || !re.GetConfig || !re.BeginFrame || !re.EndFrame ) {
 		// Renderer not fully initialized yet or failed to initialize, skip rendering
-		if ( !FS_StartupInProgress() && com_developer && com_developer->integer ) {
-			Com_Printf( "DEBUG: SCR_UpdateScreen - renderer not ready (re_initialized=%d, GetConfig=%p, BeginFrame=%p, EndFrame=%p), skipping\n", 
-				re_initialized, (void*)re.GetConfig, (void*)re.BeginFrame, (void*)re.EndFrame );
-		}
 		// Even if renderer isn't ready, try calling BeginFrame once to trigger recovery if device is lost
 		// This ensures recovery attempts happen even during initialization
 		if ( re_initialized && re.BeginFrame ) {
 			static int recovery_attempt_count = 0;
 			if ( recovery_attempt_count < 3 ) {
 				recovery_attempt_count++;
-				Com_Printf( "DEBUG: SCR_UpdateScreen - attempting BeginFrame call for recovery (attempt %d)\n", recovery_attempt_count );
 				re.BeginFrame( STEREO_CENTER );
 			}
 		}
@@ -684,10 +668,10 @@ void SCR_UpdateScreen( void ) {
 	// If neither UI VM nor UI initialization exists, stop the renderer
 	if ( uivm || cls.uiStarted )
 	{
-		// XXX
-		int in_anaglyphMode = Cvar_VariableIntegerValue("r_anaglyphMode");
+		// Check for anaglyph mode (red/cyan 3D glasses)
+		const int in_anaglyphMode = Cvar_VariableIntegerValue("r_anaglyphMode");
 		// if running in stereo, we need to draw the frame twice
-		if ( cls.glconfig.stereoEnabled || in_anaglyphMode) {
+		if ( cls.glconfig.stereoEnabled || in_anaglyphMode ) {
 			SCR_DrawScreenField( STEREO_LEFT );
 			SCR_DrawScreenField( STEREO_RIGHT );
 		} else {

src/renderers/vulkan/tr_scene.c

@@ -57,6 +57,10 @@ static cpu_particle_t	cpu_particles[MAX_CPU_PARTICLES];
 static int				cpu_particle_count = 0;
 static float			last_particle_update_time = 0.0f;
 
+// Forward declarations for static particle functions
+static void R_ProcessCPUParticles( float deltaTime );
+static void R_RenderCPUParticles( void );
+
 
 /*
 ====================