From 831302210ca74da4d319c33528aeb29fcc591049 Mon Sep 17 00:00:00 2001
From: Juhu <5894800-Juhu_@users.noreply.gitlab.com>
Date: Thu, 6 Jul 2023 21:01:20 +0200
Subject: [PATCH] strafehud: add strafe efficiency indicator

---
 _hud_common.cfg                     |  2 ++
 qcsrc/client/hud/panel/strafehud.qc | 20 +++++++++++++++++++-
 qcsrc/client/hud/panel/strafehud.qh |  2 ++
 3 files changed, 23 insertions(+), 1 deletion(-)

diff --git a/_hud_common.cfg b/_hud_common.cfg
index a3b4a5c20..953984a77 100644
--- a/_hud_common.cfg
+++ b/_hud_common.cfg
@@ -224,6 +224,8 @@ seta hud_panel_strafehud_sonar_pitch_exponent "1" "exponent of the dynamic playb
 seta hud_panel_strafehud_vangle "0" "set to \"1\" to enable the vertical angle indicator"
 seta hud_panel_strafehud_vangle_color "0.75 0.75 0.75" "color of the vertical angle text"
 seta hud_panel_strafehud_vangle_size "1" "size of the vertical angle text (relative to the panel height)"
+seta hud_panel_strafehud_strafeefficiency "0" "set to \"1\" to enable the strafe efficiency indicator"
+seta hud_panel_strafehud_strafeefficiency_size "1" "size of the strafe efficiency text (relative to the panel height)"
 seta hud_panel_strafehud_projection "0" "strafehud projection mode, \"0\" = linear, \"1\" = perspective, \"2\" = panoramic"
 
 // hud panel aliases
diff --git a/qcsrc/client/hud/panel/strafehud.qc b/qcsrc/client/hud/panel/strafehud.qc
index 88a80976f..3bfcdd3dc 100644
--- a/qcsrc/client/hud/panel/strafehud.qc
+++ b/qcsrc/client/hud/panel/strafehud.qc
@@ -921,10 +921,10 @@ void HUD_StrafeHUD()
 		}
 
 		// draw the actual strafe angle
+		float strafe_ratio = 0;
 		if(!immobile)
 		{
 			float moveangle = fabs(angle + wishangle);
-			float strafe_ratio = 0;
 
 			// player is overturning
 			if(moveangle >= 90)
@@ -1136,6 +1136,24 @@ void HUD_StrafeHUD()
 			}
 		}
 
+		// strafe efficiency
+		{
+			if(autocvar_hud_panel_strafehud_strafeefficiency)
+			{
+				float strafeeff_height = autocvar_hud_panel_strafehud_strafeefficiency_size * panel_size.y;
+				string strafeeff_text = strcat(ftos_decimals(strafe_ratio * 100, 2), "%");
+			    vector strafeeff_color = '1 1 1' - (strafe_ratio > 0 ? '1 0 1' : '0 1 1') * fabs(strafe_ratio);
+
+				bool was_drawn = StrafeHUD_drawTextIndicator(
+					strafeeff_text, strafeeff_height,
+					strafeeff_color, 1,
+					time, text_offset_top, STRAFEHUD_TEXT_TOP);
+
+				if(was_drawn)
+					text_offset_top += strafeeff_height;
+			}
+		}
+
 		// show height achieved by a single jump
 		// FIXME: checking z position differences is unreliable (warpzones, teleporter, kill, etc) but using velocity to calculate jump height would be
 		//        inaccurate in hud code (possibly different tick rate than physics, doesn't run when hud isn't drawn, rounding errors)
diff --git a/qcsrc/client/hud/panel/strafehud.qh b/qcsrc/client/hud/panel/strafehud.qh
index 782831acd..861a566b7 100644
--- a/qcsrc/client/hud/panel/strafehud.qh
+++ b/qcsrc/client/hud/panel/strafehud.qh
@@ -73,6 +73,8 @@ float autocvar_hud_panel_strafehud_sonar_pitch_exponent = 1;
 bool autocvar_hud_panel_strafehud_vangle = false;
 vector autocvar_hud_panel_strafehud_vangle_color = '0.75 0.75 0.75';
 float autocvar_hud_panel_strafehud_vangle_size = 1;
+bool autocvar_hud_panel_strafehud_strafeefficiency = false;
+float autocvar_hud_panel_strafehud_strafeefficiency_size = 1;
 int autocvar_hud_panel_strafehud_projection = 0;
 
 void HUD_Panel_DrawStrafeHUD(float, float, float, vector, float, int, int, bool, float);
-- 
2.39.2