Add Asset interface to create an arbitrarily placed instance

InstanceProxy is returned out via a std::any containing a
std::shared_ptr because any can only contain copyable things.

4 files changed, 24 insertions, 0 deletions

diff --git a/game/scenary/foliage.cpp b/game/scenary/foliage.cpp
index 159a078..140c4e5 100644
--- a/game/scenary/foliage.cpp
+++ b/game/scenary/foliage.cpp
@@ -2,6 +2,16 @@
 #include "gfx/gl/sceneShader.h"
 #include "gfx/gl/shadowMapper.h"
 #include "gfx/gl/vertexArrayObject.h"
+#include <location.h>
+
+static_assert(std::is_constructible_v<Foliage>);
+
+std::any
+Foliage::createAt(const Location & position) const
+{
+	return std::make_shared<InstanceVertices<LocationVertex>::InstanceProxy>(
+			instances.acquire(position.getRotationTransform(), position.rot.y, position.pos));
+}
 
 bool
 Foliage::persist(Persistence::PersistenceStore & store)
diff --git a/game/scenary/foliage.h b/game/scenary/foliage.h
index 71bc734..d15a8b0 100644
--- a/game/scenary/foliage.h
+++ b/game/scenary/foliage.h
@@ -17,6 +17,8 @@ class Foliage : public Asset, public Renderable, public StdTypeDefs<Foliage> {
 	glVertexArray instancePointVAO;
 
 public:
+	[[nodiscard]] std::any createAt(const Location &) const override;
+
 	struct LocationVertex {
 		glm::mat3 rotation;
 		float yaw;
diff --git a/game/scenary/illuminator.cpp b/game/scenary/illuminator.cpp
index f1a02b2..d8e4c4e 100644
--- a/game/scenary/illuminator.cpp
+++ b/game/scenary/illuminator.cpp
@@ -2,6 +2,16 @@
 #include "gfx/gl/sceneShader.h"
 #include "gfx/gl/vertexArrayObject.h"
 #include "gfx/models/texture.h" // IWYU pragma: keep
+#include <location.h>
+
+static_assert(std::is_constructible_v<Illuminator>);
+
+std::any
+Illuminator::createAt(const Location & position) const
+{
+	return std::make_shared<InstanceVertices<LocationVertex>::InstanceProxy>(
+			instances.acquire(position.getRotationTransform(), position.pos));
+}
 
 bool
 Illuminator::SpotLight::persist(Persistence::PersistenceStore & store)
diff --git a/game/scenary/illuminator.h b/game/scenary/illuminator.h
index 47ce337..200ba40 100644
--- a/game/scenary/illuminator.h
+++ b/game/scenary/illuminator.h
@@ -15,6 +15,8 @@ class Illuminator : public Asset, public Renderable, public StdTypeDefs<Illumina
 	std::optional<glVertexArray> instancesSpotLightVAO, instancesPointLightVAO;
 
 public:
+	[[nodiscard]] std::any createAt(const Location &) const override;
+
 	struct LightCommonVertex {
 		RelativePosition3D position;
 		RGB colour;