From 413eb84b6c807cbd7977b64eead54a0a23fd2fa3 Mon Sep 17 00:00:00 2001
From: Garux <garux@mail.ru>
Date: Fri, 19 Sep 2025 03:58:33 +0500
Subject: [PATCH] * render camera crosshair sharply independently of viewport
 size, with shadow

---
 docs/changelog-custom.txt |  1 +
 radiant/camwindow.cpp     | 28 ++++++++++++++++++----------
 2 files changed, 19 insertions(+), 10 deletions(-)

diff --git a/docs/changelog-custom.txt b/docs/changelog-custom.txt
index 0e7c0239..0da2357e 100644
--- a/docs/changelog-custom.txt
+++ b/docs/changelog-custom.txt
@@ -1143,6 +1143,7 @@ misc...
 	* Layers Browser: New Layer, Show All Layers, Hide All Layers buttons
 	* new icons by Julius, high dpi scaling support
 	* improved GUI themes, new unmodified Fusion theme, external .qss file
+	* render camera crosshair sharply independently of viewport size, with shadow
 
 
 
diff --git a/radiant/camwindow.cpp b/radiant/camwindow.cpp
index d02e50a6..43b283e8 100644
--- a/radiant/camwindow.cpp
+++ b/radiant/camwindow.cpp
@@ -2084,16 +2084,24 @@ void CamWnd::Cam_Draw(){
 
 	// draw the crosshair
 	if ( m_bFreeMove ) {
-		gl().glBegin( GL_LINES );
-		gl().glVertex2f( (float)m_Camera.width / 2.f, (float)m_Camera.height / 2.f + 6 );
-		gl().glVertex2f( (float)m_Camera.width / 2.f, (float)m_Camera.height / 2.f + 2 );
-		gl().glVertex2f( (float)m_Camera.width / 2.f, (float)m_Camera.height / 2.f - 6 );
-		gl().glVertex2f( (float)m_Camera.width / 2.f, (float)m_Camera.height / 2.f - 2 );
-		gl().glVertex2f( (float)m_Camera.width / 2.f + 6, (float)m_Camera.height / 2.f );
-		gl().glVertex2f( (float)m_Camera.width / 2.f + 2, (float)m_Camera.height / 2.f );
-		gl().glVertex2f( (float)m_Camera.width / 2.f - 6, (float)m_Camera.height / 2.f );
-		gl().glVertex2f( (float)m_Camera.width / 2.f - 2, (float)m_Camera.height / 2.f );
-		gl().glEnd();
+		 // .5 coords for exact pixel rendering
+		const Vector2 cent( ( m_Camera.width + 1 ) / 2 + .5f, ( m_Camera.height + 1 ) / 2 + .5f );
+		constexpr float a = 6.5, b = 2.5;
+		for( float f : { 0.f, 1.f } )
+		{
+			gl().glColor3f( f, f, f );
+			const Vector2 verts[]{
+				cent + Vector2(  0,  a ) - Vector2( f, f ),
+				cent + Vector2(  0,  b ) - Vector2( f, f ),
+				cent + Vector2(  0, -a ) - Vector2( f, f ),
+				cent + Vector2(  0, -b ) - Vector2( f, f ),
+				cent + Vector2(  a,  0 ) - Vector2( f, f ),
+				cent + Vector2(  b,  0 ) - Vector2( f, f ),
+				cent + Vector2( -a,  0 ) - Vector2( f, f ),
+				cent + Vector2( -b,  0 ) - Vector2( f, f ) };
+			gl().glVertexPointer( 2, GL_FLOAT, sizeof( *verts ), verts->data() );
+			gl().glDrawArrays( GL_LINES, 0, std::size( verts ) );
+		}
 	}
 
 	if ( g_camwindow_globals.m_showStats ) {