From 7c8b8a39fd36e190578587d8d92f28f460a1fc4b Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Sun, 2 Jan 2022 21:07:37 +0000
Subject: Encapsulate Ray

---
 game/vehicles/railVehicle.cpp | 9 +++++----
 game/vehicles/railVehicle.h   | 3 ++-
 game/vehicles/train.cpp       | 6 ++++--
 game/vehicles/train.h         | 3 ++-
 4 files changed, 13 insertions(+), 8 deletions(-)

(limited to 'game/vehicles')

diff --git a/game/vehicles/railVehicle.cpp b/game/vehicles/railVehicle.cpp
index 8d7b06f..9ad1ea7 100644
--- a/game/vehicles/railVehicle.cpp
+++ b/game/vehicles/railVehicle.cpp
@@ -9,6 +9,7 @@
 #include <location.hpp>
 #include <maths.h>
 #include <memory>
+#include <ray.hpp>
 
 void
 RailVehicle::render(const Shader & shader) const
@@ -29,7 +30,7 @@ RailVehicle::move(const Train * t, float & trailBy)
 }
 
 bool
-RailVehicle::intersectRay(const glm::vec3 & pos, const glm::vec3 & dir, glm::vec2 * baryPos, float * eh) const
+RailVehicle::intersectRay(const Ray & ray, glm::vec2 * baryPos, float * eh) const
 {
 	constexpr const auto X = 1.35F;
 	const auto Y = this->rvClass->length / 2.F;
@@ -63,8 +64,8 @@ RailVehicle::intersectRay(const glm::vec3 & pos, const glm::vec3 & dir, glm::vec
 			{3, 6, 7},
 	}};
 	return std::any_of(
-			triangles.begin(), triangles.end(), [&cornerVertices, &pos, &dir, &baryPos, &eh](const glm::uvec3 idx) {
-				return glm::intersectRayTriangle(pos, dir, cornerVertices[idx[0]], cornerVertices[idx[1]],
-						cornerVertices[idx[2]], *baryPos, *eh);
+			triangles.begin(), triangles.end(), [&cornerVertices, &ray, &baryPos, &eh](const glm::uvec3 idx) {
+				return glm::intersectRayTriangle(ray.start, ray.direction, cornerVertices[idx[0]],
+						cornerVertices[idx[1]], cornerVertices[idx[2]], *baryPos, *eh);
 			});
 }
diff --git a/game/vehicles/railVehicle.h b/game/vehicles/railVehicle.h
index f52b154..5fbe1ed 100644
--- a/game/vehicles/railVehicle.h
+++ b/game/vehicles/railVehicle.h
@@ -10,6 +10,7 @@
 #include <utility>
 
 class Shader;
+class Ray;
 
 class Train;
 class RailVehicle : public Renderable, Selectable {
@@ -19,7 +20,7 @@ public:
 	void move(const Train *, float & trailBy);
 
 	void render(const Shader & shader) const override;
-	[[nodiscard]] bool intersectRay(const glm::vec3 &, const glm::vec3 &, glm::vec2 *, float *) const override;
+	[[nodiscard]] bool intersectRay(const Ray &, glm::vec2 *, float *) const override;
 
 	Location location;
 
diff --git a/game/vehicles/train.cpp b/game/vehicles/train.cpp
index 4f19bed..05915c4 100644
--- a/game/vehicles/train.cpp
+++ b/game/vehicles/train.cpp
@@ -9,6 +9,8 @@
 #include <optional>
 #include <utility>
 
+class Ray;
+
 void
 Train::render(const Shader & shader) const
 {
@@ -24,9 +26,9 @@ Train::getBogiePosition(float linkDist, float dist) const
 }
 
 bool
-Train::intersectRay(const glm::vec3 & pos, const glm::vec3 & dir, glm::vec2 * baryPos, float * eh) const
+Train::intersectRay(const Ray & ray, glm::vec2 * baryPos, float * eh) const
 {
-	return applyOne(&RailVehicle::intersectRay, pos, dir, baryPos, eh) != end();
+	return applyOne(&RailVehicle::intersectRay, ray, baryPos, eh) != end();
 }
 
 void
diff --git a/game/vehicles/train.h b/game/vehicles/train.h
index 68f9fbf..0c6a741 100644
--- a/game/vehicles/train.h
+++ b/game/vehicles/train.h
@@ -14,6 +14,7 @@
 #include <vector>
 
 class Shader;
+class Ray;
 
 class Train : public Vehicle, public Collection<RailVehicle, false>, public Can<Go>, public Can<Idle> {
 public:
@@ -27,7 +28,7 @@ public:
 
 	void render(const Shader & shader) const override;
 
-	[[nodiscard]] bool intersectRay(const glm::vec3 &, const glm::vec3 &, glm::vec2 *, float *) const override;
+	[[nodiscard]] bool intersectRay(const Ray &, glm::vec2 *, float *) const override;
 
 	void tick(TickDuration elapsed) override;
 	void doActivity(Go *, TickDuration) override;
-- 
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