feat: add implicit step speed hud

Author: Krzyhau

docs/cvars.md

@@ -267,6 +267,7 @@
 |sar_hud_groundframes|0|Draws the number of ground frames since last landing. Setting it to 2 preserves the value.|
 |sar_hud_groundspeed|0|Draw the speed of the player upon leaving the ground.<br>0 = Default<br>1 = Groundspeed<br>2 = Groundspeed (Gain)|
 |sar_hud_hide_text|cmd|sar_hud_hide_text \<id\|all> - hides the nth text value in the HUD|
+|sar_hud_implicit_step_speed|0|Draw the player's implicit vertical step speed (requires sv_cheats).|
 |sar_hud_inspection|0|Draws entity inspection data.|
 |sar_hud_jump|0|Draws current jump distance.|
 |sar_hud_jump_peak|0|Draws longest jump distance.|

src/Features/Hud/Hud.cpp

@@ -301,6 +301,7 @@ std::vector<std::string> elementOrder = {
 	"frame",
 	"last_frame",
 	"inspection",
+	"implicit_step_speed"
 };
 
 void HudElement::IndexAll() {
@@ -907,6 +908,17 @@ HUD_ELEMENT_MODE2(ent_slot_serial, "0", 0, 4096,
 	ctx->DrawElement("ent slot %d serial: %d", mode, serial);
 }
 
+HUD_ELEMENT2(implicit_step_speed, "0", "Draw the player's implicit vertical step speed (requires sv_cheats).\n", HudType_InGame | HudType_Paused | HudType_LoadingScreen) {
+	auto player = server->GetPlayer(ctx->slot + 1);
+	if (!player || !sv_cheats.GetBool()) {
+		ctx->DrawElement("implicit step speed: -");
+		return;
+	}
+
+	float implicitStepSpeed = player->fieldOff<float>("m_flUseKeyCooldownTime", 8);
+	ctx->DrawElement("implicit step speed: %f", implicitStepSpeed);
+}
+
 HUD_ELEMENT_MODE2(fps, "0", 0, 2, "Show fps (frames per second) on the SAR hud.\n1 - Show fps\n2 - Show fps with fps cap\n", HudType_InGame | HudType_Paused | HudType_Menu) {
 	if (mode == 1) {
 		ctx->DrawElement("fps: %.0f", g_cur_fps);