From 8b388c4ee59961f4d307c7f9f87641beffb76a53 Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Sun, 22 Dec 2024 13:29:15 +0000
Subject: Expose network base width and surface

---
 game/network/network.h |  4 ++++
 game/network/rail.cpp  | 14 ++++++++++++++
 game/network/rail.h    |  3 +++
 test/test-network.cpp  | 12 ++++++++++++
 4 files changed, 33 insertions(+)

diff --git a/game/network/network.h b/game/network/network.h
index be0900b..f8739b8 100644
--- a/game/network/network.h
+++ b/game/network/network.h
@@ -14,6 +14,7 @@
 #include <utility>
 
 class SceneShader;
+class Surface;
 template<typename> class Ray;
 
 template<size_t... n> using GenDef = std::tuple<glm::vec<n, GlobalDistance>...>;
@@ -47,6 +48,9 @@ public:
 
 	[[nodiscard]] virtual float findNodeDirection(Node::AnyCPtr) const = 0;
 
+	[[nodiscard]] virtual const Surface * getBaseSurface() const = 0;
+	[[nodiscard]] virtual RelativeDistance getBaseWidth() const = 0;
+
 protected:
 	static void joinLinks(const Link::Ptr & l, const Link::Ptr & ol);
 	static GenCurveDef genCurveDef(const GlobalPosition3D & start, const GlobalPosition3D & end, float startDir);
diff --git a/game/network/rail.cpp b/game/network/rail.cpp
index f226327..dc62cf3 100644
--- a/game/network/rail.cpp
+++ b/game/network/rail.cpp
@@ -1,4 +1,6 @@
 #include "rail.h"
+#include "game/gamestate.h"
+#include "game/geoData.h"
 #include "network.h"
 #include <game/network/network.impl.h> // IWYU pragma: keep
 #include <gfx/gl/sceneShader.h>
@@ -169,3 +171,15 @@ RailLinks::render(const SceneShader & shader) const
 		glBindVertexArray(0);
 	}
 }
+
+const Surface *
+RailLinks::getBaseSurface() const
+{
+	return std::dynamic_pointer_cast<Surface>(gameState->assets.at("terrain.surface.gravel")).get();
+}
+
+RelativeDistance
+RailLinks::getBaseWidth() const
+{
+	return 5'700;
+}
diff --git a/game/network/rail.h b/game/network/rail.h
index 0aae718..fa64eda 100644
--- a/game/network/rail.h
+++ b/game/network/rail.h
@@ -77,6 +77,9 @@ public:
 	std::shared_ptr<RailLink> addLinksBetween(GlobalPosition3D start, GlobalPosition3D end);
 	void render(const SceneShader &) const override;
 
+	[[nodiscard]] const Surface * getBaseSurface() const override;
+	[[nodiscard]] RelativeDistance getBaseWidth() const override;
+
 private:
 	void tick(TickDuration elapsed) override;
 };
diff --git a/test/test-network.cpp b/test/test-network.cpp
index ce25429..5373dd5 100644
--- a/test/test-network.cpp
+++ b/test/test-network.cpp
@@ -73,6 +73,18 @@ struct TestNetwork : public NetworkOf<TestLink, TestLinkS> {
 	render(const SceneShader &) const override
 	{
 	}
+
+	const Surface *
+	getBaseSurface() const override
+	{
+		return nullptr;
+	}
+
+	RelativeDistance
+	getBaseWidth() const override
+	{
+		return 5'700;
+	}
 };
 
 const auto VALID_NODES = boost::unit_test::data::make<GlobalPosition3D>({
-- 
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