From c7af64b7061c59c987958d0830838f1c05caeb29 Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Fri, 19 Jan 2024 00:23:56 +0000
Subject: Render rail network using new shaders

Non-functional, totally unimplemented at this stage
---
 game/network/network.h      |  3 +--
 game/network/network.impl.h | 11 -----------
 game/network/rail.cpp       | 22 ++++++++++++++++++++--
 game/network/rail.h         |  1 +
 4 files changed, 22 insertions(+), 15 deletions(-)

(limited to 'game')

diff --git a/game/network/network.h b/game/network/network.h
index 12c006c..49322f9 100644
--- a/game/network/network.h
+++ b/game/network/network.h
@@ -60,6 +60,7 @@ protected:
 };
 
 template<typename LinkType> class NetworkLinkHolder {
+protected:
 	friend LinkType;
 	mutable InstanceVertices<typename LinkType::Vertex> vertices;
 };
@@ -105,8 +106,6 @@ public:
 
 	[[nodiscard]] float findNodeDirection(Node::AnyCPtr) const override;
 
-	void render(const SceneShader &) const override;
-
 protected:
 	Link::CCollection addJoins();
 };
diff --git a/game/network/network.impl.h b/game/network/network.impl.h
index c1f079d..ff29088 100644
--- a/game/network/network.impl.h
+++ b/game/network/network.impl.h
@@ -2,17 +2,6 @@
 #include <gfx/gl/sceneShader.h>
 #include <gfx/models/texture.h>
 
-template<typename T, typename... Links>
-void
-NetworkOf<T, Links...>::render(const SceneShader & shader) const
-{
-	if constexpr (std::is_base_of_v<Renderable, T>) {
-		shader.absolute.use();
-		texture->bind();
-		links.apply(&Renderable::render, shader);
-	}
-}
-
 template<typename T, typename... Links>
 void
 NetworkOf<T, Links...>::joinLinks(const Link::Ptr & l) const
diff --git a/game/network/rail.cpp b/game/network/rail.cpp
index 3d29ea5..9766851 100644
--- a/game/network/rail.cpp
+++ b/game/network/rail.cpp
@@ -127,7 +127,7 @@ RailLinkStraight::RailLinkStraight(
 		NetworkLinkHolder<RailLinkStraight> & instances, Node::Ptr a, Node::Ptr b, const RelativePosition3D & diff) :
 	Link({std::move(a), vector_yaw(diff)}, {std::move(b), vector_yaw(-diff)}, glm::length(diff)),
 	instance {instances.vertices.acquire(
-			ends[0].node->pos, ends[1].node->pos, flat_orientation(diff), round_sleepers(length / 2.F))}
+			ends[0].node->pos, ends[1].node->pos, flat_orientation(diff), round_sleepers(length / 2000.F))}
 {
 	if (glGenVertexArrays) {
 		std::vector<::Vertex> vertices;
@@ -155,7 +155,7 @@ RailLinkCurve::RailLinkCurve(NetworkLinkHolder<RailLinkCurve> & instances, const
 	Link({a, normalize(arc.first + half_pi)}, {b, normalize(arc.second - half_pi)},
 			glm::length(RelativePosition3D(a->pos - c)) * arc_length(arc)),
 	LinkCurve {c, glm::length(RelativePosition3D(ends[0].node->pos - c)), arc},
-	instance {instances.vertices.acquire(ends[0].node->pos, ends[1].node->pos, c, round_sleepers(length / 2.F))}
+	instance {instances.vertices.acquire(ends[0].node->pos, ends[1].node->pos, c, round_sleepers(length / 2000.F))}
 
 {
 	if (glGenVertexArrays) {
@@ -185,3 +185,21 @@ RailLink::vehiclePositionOffset() const
 {
 	return RAIL_HEIGHT;
 }
+
+void
+RailLinks::render(const SceneShader & shader) const
+{
+	auto renderType = [](auto & v, auto & s) {
+		if (auto count = v.size()) {
+			s.use();
+			glBindBuffer(GL_VERTEX_ARRAY, v.bufferName());
+			glDrawArrays(GL_POINTS, 0, static_cast<GLsizei>(count));
+		}
+	};
+	if (!links.objects.empty()) {
+		texture->bind();
+		renderType(NetworkLinkHolder<RailLinkStraight>::vertices, shader.networkStraight);
+		renderType(NetworkLinkHolder<RailLinkCurve>::vertices, shader.networkCurve);
+		glBindBuffer(GL_VERTEX_ARRAY, 0);
+	}
+}
diff --git a/game/network/rail.h b/game/network/rail.h
index e06568f..5191b90 100644
--- a/game/network/rail.h
+++ b/game/network/rail.h
@@ -77,6 +77,7 @@ public:
 	RailLinks();
 
 	std::shared_ptr<RailLink> addLinksBetween(GlobalPosition3D start, GlobalPosition3D end);
+	void render(const SceneShader &) const override;
 
 private:
 	void tick(TickDuration elapsed) override;
-- 
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