feat: `sar_velocitygraph_show_line (#276)

Added "sar_velocitygraph_show_line" which when set to 0 (1 by default), keeps only the speedometer from the velocity graph giving us a speedometer like in Half-Life 1.

This displays our velocity separate from the HUD in the bottom middle of our screen nicely, so we can more easily see it whilst bunnyhopping.

docs/cvars.md

@@ -638,6 +638,7 @@
 |sar_velocitygraph|0|Shows velocity graph.|
 |sar_velocitygraph_background|0|Background of velocity graph.|
 |sar_velocitygraph_font_index|21|Font index of velocity graph.|
+|sar_velocitygraph_show_line|1|Shows line for velocity graph.|
 |sar_velocitygraph_rainbow|0|Rainbow mode of velocity graph text.|
 |sar_velocitygraph_show_speed_on_graph|1|Show speed between jumps.|
 |sar_velocitygraph_x|-250|Velocity graph x axis offset.|

src/Features/Hud/VelocityGraph.cpp

@@ -14,6 +14,7 @@
 
 Variable sar_velocitygraph("sar_velocitygraph", "0", "Shows velocity graph.\n");
 Variable sar_velocitygraph_font_index("sar_velocitygraph_font_index", "21", 0, "Font index of velocity graph.\n"); // 21 looks pretty good
+Variable sar_velocitygraph_show_line("sar_velocitygraph_show_line", "1", "Shows line for velocity graph.\n");
 Variable sar_velocitygraph_x("sar_velocitygraph_x", "-250", "Velocity graph x axis offset.\n");
 Variable sar_velocitygraph_y("sar_velocitygraph_y", "-175", "Velocity graph y axis offset.\n");
 Variable sar_velocitygraph_background("sar_velocitygraph_background", "0", "Background of velocity graph.\n"); // imo this should be off by default
@@ -81,8 +82,23 @@ void VelocityGraph::Paint(int slot) {
 	const Vector2<int> graphPos = Vector2<int>(x / 2, y) + 
 		Vector2<int>(sar_velocitygraph_x.GetInt(), sar_velocitygraph_y.GetInt());
 
-	if (sar_velocitygraph_background.GetBool())
-		surface->DrawRect({0, 0, 0, 192}, graphPos - Vector2<int>(5, 150 + 5), graphPos + Vector2<int>(5 + 500, 5));
+	bool should_draw_takeoff = !last_on_ground[slot] || take_off_display_timeout[slot] > engine->GetClientTime();
+	int recentSpeed = velocityStamps[slot][velocityStamps[slot].size - 10].speed;
+	Color c = Color(30, 255, 109);
+	if (sar_velocitygraph_rainbow.GetBool()) {
+		c = Utils::HSVToRGB(speed, 100, 100);
+	} else if (std::abs(speed - recentSpeed) < 5) {
+		c = Color(255, 199, 89);
+	} else if (speed < recentSpeed + 5) {
+		c = Color(255, 119, 119);
+	}
+
+	auto font = scheme->GetFontByID(sar_velocitygraph_font_index.GetInt());
+	auto length = surface->GetFontLength(font, should_draw_takeoff ? "%i (%i)\n" : "%i", speed, take_off[slot]);
+
+	surface->DrawTxt(font, graphPos.x + 250 - length / 2, graphPos.y + 25, c, should_draw_takeoff ? "%i (%i)\n" : "%i", speed, take_off[slot]);
+
+	if (!sar_velocitygraph_show_line.GetBool()) return;
 
 	for (int i = 1; i < velocityStamps[slot].size - 1; i++) {
 		const auto current = velocityStamps[slot][i];
@@ -102,28 +118,14 @@ void VelocityGraph::Paint(int slot) {
 					Color(255, 255, 255), std::to_string(next.speed).c_str());
 			}
 		}
-
 		surface->DrawColoredLine(
 			graphPos + Vector2<int>(i - 1, -current_speed),
 			graphPos + Vector2<int>(i, -next_speed),
 			Color(255, 255, 255));
 	}
 
-	bool should_draw_takeoff = !last_on_ground[slot] || take_off_display_timeout[slot] > engine->GetClientTime();
-	int recentSpeed = velocityStamps[slot][velocityStamps[slot].size - 10].speed;
-	Color c = Color(30, 255, 109);
-	if (sar_velocitygraph_rainbow.GetBool()) {
-		c = Utils::HSVToRGB(speed, 100, 100);
-	} else if (std::abs(speed - recentSpeed) < 5) {
-		c = Color(255, 199, 89);
-	} else if (speed < recentSpeed + 5) {
-		c = Color(255, 119, 119);
-	}
-
-	auto font = scheme->GetFontByID(sar_velocitygraph_font_index.GetInt());
-	auto length = surface->GetFontLength(font, should_draw_takeoff ? "%i (%i)\n" : "%i", speed, take_off[slot]);
-
-	surface->DrawTxt(font, graphPos.x + 250 - length / 2, graphPos.y + 25, c, should_draw_takeoff ? "%i (%i)\n" : "%i", speed, take_off[slot]);
+	if (sar_velocitygraph_background.GetBool())
+		surface->DrawRect({0, 0, 0, 192}, graphPos - Vector2<int>(5, 150 + 5), graphPos + Vector2<int>(5 + 500, 5));
 }
 bool VelocityGraph::GetCurrentSize(int &xSize, int &ySize) {
 	return false;

src/Features/Hud/VelocityGraph.hpp

@@ -16,6 +16,7 @@ extern VelocityGraph *velocityGraph;
 
 extern Variable sar_velocitygraph;
 extern Variable sar_velocitygraph_font_index;
+extern Variable sar_velocitygraph_show_line;
 extern Variable sar_velocitygraph_x;
 extern Variable sar_velocitygraph_y;
 extern Variable sar_velocitygraph_background;