Merge branch 'model-factory'

1 files changed, 85 insertions, 0 deletions

diff --git a/assetFactory/assetFactory.cpp b/assetFactory/assetFactory.cpp
new file mode 100644
index 0000000..f5fc2b3
--- /dev/null
+++ b/assetFactory/assetFactory.cpp
@@ -0,0 +1,85 @@
+#include "assetFactory.h"
+#include "collections.hpp"
+#include "cuboid.h"
+#include "cylinder.h"
+#include "modelFactoryMesh_fwd.h"
+#include "object.h"
+#include "plane.h"
+#include "saxParse-persistence.h"
+#include <filesystem.h>
+
+AssetFactory::AssetFactory() :
+	shapes {
+			{"plane", std::make_shared<Plane>()},
+			{"cuboid", std::make_shared<Cuboid>()},
+			{"cylinder", std::make_shared<Cylinder>()},
+	},
+	colours {parseX11RGB("/usr/share/X11/rgb.txt")}
+{
+}
+
+std::shared_ptr<AssetFactory>
+AssetFactory::loadXML(const std::filesystem::path & filename)
+{
+	filesystem::FileStar file {filename.c_str(), "r"};
+	return Persistence::SAXParsePersistence {}.loadState<std::shared_ptr<AssetFactory>>(file);
+}
+
+AssetFactory::Colours
+AssetFactory::parseX11RGB(const char * path)
+{
+	filesystem::FileStar rgb {path, "r"};
+	Colours out;
+	Colour colour;
+	char inname[BUFSIZ];
+	while (fscanf(rgb, "%f %f %f %[^\n\r]s", &colour.r, &colour.g, &colour.b, inname) == 4) {
+		std::string name {inname};
+		normalizeColourName(name);
+		out.emplace(std::move(name), colour / 255.f);
+	}
+	return out;
+}
+
+void
+AssetFactory::normalizeColourName(std::string & name)
+{
+	std::erase_if(name, ::isblank);
+	name *= [l = std::locale {}](auto & ch) {
+		ch = std::tolower(ch, l);
+	};
+}
+
+AssetFactory::ColourAlpha
+AssetFactory::parseColour(std::string_view in) const
+{
+	if (in.empty()) {
+		throw std::runtime_error("Empty colour specification");
+	}
+	if (in[0] == '#') {
+		if (in.length() > 9 || in.length() % 2 == 0) {
+			throw std::runtime_error("Invalid hex colour specification");
+		}
+		ColourAlpha out {0, 0, 0, 1};
+		std::generate_n(&out.r, (in.length() - 1) / 2, [in = in.data() + 1]() mutable {
+			uint8_t channel;
+			std::from_chars(in, in + 2, channel, 16);
+			in += 2;
+			return static_cast<float>(channel) / 255.f;
+		});
+		return out;
+	}
+	if (auto mf = Persistence::ParseBase::getShared<const AssetFactory>("assetFactory")) {
+		if (const auto colour = mf->colours.find(in); colour != mf->colours.end()) {
+			return {colour->second, 1};
+		}
+	}
+	throw std::runtime_error("No such asset factory colour");
+}
+bool
+AssetFactory::persist(Persistence::PersistenceStore & store)
+{
+	using MapObjects = Persistence::MapByMember<Shapes, std::shared_ptr<Object>>;
+	using MapAssets = Persistence::MapByMember<Assets>;
+	return STORE_TYPE && STORE_NAME_HELPER("object", shapes, MapObjects)
+			&& STORE_NAME_HELPER("asset", assets, MapAssets);
+}