Initial commit of the shadow map generator and shadows render interface

Lots of hard coding, buggy in places, far from great, but the basics
work.

8 files changed, 33 insertions, 0 deletions

diff --git a/game/terrain.cpp b/game/terrain.cpp
index 31f7fb1..f798254 100644
--- a/game/terrain.cpp
+++ b/game/terrain.cpp
@@ -7,6 +7,7 @@
 #include <cstddef>
 #include <filesystem>
 #include <gfx/gl/sceneShader.h>
+#include <gfx/gl/shadowMapper.h>
 #include <gfx/image.h>
 #include <gfx/models/mesh.h>
 #include <gfx/models/vertex.hpp>
@@ -93,3 +94,10 @@ Terrain::render(const SceneShader & shader) const
 	water->bind();
 	meshes.apply(&Mesh::Draw);
 }
+
+void
+Terrain::shadows(const ShadowMapper & shadowMapper) const
+{
+	shadowMapper.fixedPoint.use();
+	meshes.apply(&Mesh::Draw);
+}
diff --git a/game/terrain.h b/game/terrain.h
index 70f947c..879d173 100644
--- a/game/terrain.h
+++ b/game/terrain.h
@@ -16,6 +16,7 @@ public:
 	explicit Terrain(std::shared_ptr<GeoData>);
 
 	void render(const SceneShader & shader) const override;
+	void shadows(const ShadowMapper &) const override;
 
 	void tick(TickDuration) override;
 	float waveCycle {0.F};
diff --git a/game/vehicles/railVehicle.cpp b/game/vehicles/railVehicle.cpp
index 0cf4e72..bcde68f 100644
--- a/game/vehicles/railVehicle.cpp
+++ b/game/vehicles/railVehicle.cpp
@@ -18,6 +18,12 @@ RailVehicle::render(const SceneShader & shader) const
 }
 
 void
+RailVehicle::shadows(const ShadowMapper & shadowMapper) const
+{
+	rvClass->shadows(shadowMapper, location);
+}
+
+void
 RailVehicle::move(const Train * t, float & trailBy)
 {
 	const auto overhang {(rvClass->length - rvClass->wheelBase) / 2};
diff --git a/game/vehicles/railVehicle.h b/game/vehicles/railVehicle.h
index 39900cc..f172a28 100644
--- a/game/vehicles/railVehicle.h
+++ b/game/vehicles/railVehicle.h
@@ -10,6 +10,7 @@
 #include <utility>
 
 class SceneShader;
+class ShadowMapper;
 class Ray;
 
 class Train;
@@ -20,6 +21,7 @@ public:
 	void move(const Train *, float & trailBy);
 
 	void render(const SceneShader & shader) const override;
+	void shadows(const ShadowMapper & shadowMapper) const override;
 	[[nodiscard]] bool intersectRay(const Ray &, glm::vec2 *, float *) const override;
 
 	Location location;
diff --git a/game/vehicles/railVehicleClass.cpp b/game/vehicles/railVehicleClass.cpp
index 5bcdc6e..dff1416 100644
--- a/game/vehicles/railVehicleClass.cpp
+++ b/game/vehicles/railVehicleClass.cpp
@@ -1,5 +1,6 @@
 #include "railVehicleClass.h"
 #include "gfx/gl/sceneShader.h"
+#include "gfx/gl/shadowMapper.h"
 #include "gfx/models/mesh.h"
 #include "gfx/models/obj.h"
 #include "gfx/models/texture.h"
@@ -50,6 +51,12 @@ RailVehicleClass::render(
 		bogies[b]->Draw();
 	}
 }
+void
+RailVehicleClass::shadows(const ShadowMapper & shadowMapper, const Location & location) const
+{
+	shadowMapper.dynamicPoint.use(location);
+	bodyMesh->Draw();
+}
 
 float
 RailVehicleClass::bogieOffset(ObjParser & o)
diff --git a/game/vehicles/railVehicleClass.h b/game/vehicles/railVehicleClass.h
index 7249e76..bd74ab9 100644
--- a/game/vehicles/railVehicleClass.h
+++ b/game/vehicles/railVehicleClass.h
@@ -6,6 +6,7 @@
 #include <string>
 
 class SceneShader;
+class ShadowMapper;
 class Texture;
 class ObjParser;
 class Location;
@@ -15,6 +16,7 @@ public:
 	explicit RailVehicleClass(const std::string & name);
 
 	void render(const SceneShader &, const Location &, const std::array<Location, 2> &) const;
+	void shadows(const ShadowMapper &, const Location &) const;
 
 	std::array<Mesh::Ptr, 2> bogies;
 	Mesh::Ptr bodyMesh;
diff --git a/game/vehicles/train.cpp b/game/vehicles/train.cpp
index 8fb48f5..0332c04 100644
--- a/game/vehicles/train.cpp
+++ b/game/vehicles/train.cpp
@@ -16,6 +16,11 @@ Train::render(const SceneShader & shader) const
 {
 	apply(&Renderable::render, shader);
 }
+void
+Train::shadows(const ShadowMapper & shadowMapper) const
+{
+	apply(&Renderable::shadows, shadowMapper);
+}
 
 Location
 Train::getBogiePosition(float linkDist, float dist) const
diff --git a/game/vehicles/train.h b/game/vehicles/train.h
index dfdcf62..91f7ddb 100644
--- a/game/vehicles/train.h
+++ b/game/vehicles/train.h
@@ -14,6 +14,7 @@
 #include <vector>
 
 class SceneShader;
+class ShadowMapper;
 class Ray;
 
 class Train : public Vehicle, public Collection<RailVehicle, false>, public Can<Go>, public Can<Idle> {
@@ -27,6 +28,7 @@ public:
 	}
 
 	void render(const SceneShader & shader) const override;
+	void shadows(const ShadowMapper & shadowMapper) const override;
 
 	[[nodiscard]] bool intersectRay(const Ray &, glm::vec2 *, float *) const override;