1 files changed, 43 insertions, 0 deletions
diff --git a/assetFactory/cylinder.cpp b/assetFactory/cylinder.cpp
new file mode 100644
index 0000000..66d456d
--- /dev/null
+++ b/assetFactory/cylinder.cpp
@@ -0,0 +1,43 @@
+#include "cylinder.h"
+#include "assetFactoryConfig.h"
+#include "maths.h"
+
+Cylinder::CreatedFaces
+Cylinder::createMesh(ModelFactoryMesh & mesh, const Mutation::Matrix & mutation) const
+{
+	const glm::vec2 scale {std::accumulate(&mutation[0][0], &mutation[0][3], 0.f),
+			std::accumulate(&mutation[1][0], &mutation[1][3], 0.f)};
+	const unsigned int P = static_cast<unsigned int>(std::round(15.F * std::sqrt(glm::length(scale))));
+	std::vector<OpenMesh::VertexHandle> bottom(P), top(P);
+	std::generate_n(bottom.begin(), P, [a = 0.f, step = two_pi / static_cast<float>(P), &mesh, &mutation]() mutable {
+		const auto xy = sincosf(a += step) * .5F;
+		const auto xyz = (xy ^ 0) % mutation;
+		return mesh.add_vertex({xyz.x, xyz.y, xyz.z});
+	});
+	std::generate_n(top.begin(), P, [a = 0.f, step = two_pi / static_cast<float>(P), &mesh, &mutation]() mutable {
+		const auto xy = sincosf(a -= step) * .5F;
+		const auto xyz = (xy ^ 1) % mutation;
+		return mesh.add_vertex({xyz.x, xyz.y, xyz.z});
+	});
+	CreatedFaces surface;
+	std::generate_n(std::inserter(surface, surface.end()), P,
+			[a = 0.f, step = two_pi / static_cast<float>(P), &mesh, &mutation]() mutable {
+				const auto xy1 = sincosf(a) * .5F;
+				const auto xy2 = sincosf(a -= step) * .5F;
+				const auto xyz1b = (xy1 ^ 0) % mutation;
+				const auto xyz2b = (xy2 ^ 0) % mutation;
+				const auto xyz1t = (xy1 ^ 1) % mutation;
+				const auto xyz2t = (xy2 ^ 1) % mutation;
+				return std::make_pair(std::string {"edge"},
+						mesh.add_face({
+								mesh.add_vertex({xyz1b.x, xyz1b.y, xyz1b.z}),
+								mesh.add_vertex({xyz2b.x, xyz2b.y, xyz2b.z}),
+								mesh.add_vertex({xyz2t.x, xyz2t.y, xyz2t.z}),
+								mesh.add_vertex({xyz1t.x, xyz1t.y, xyz1t.z}),
+						}));
+			});
+	surface.emplace("bottom", mesh.add_face(bottom));
+	surface.emplace("top", mesh.add_face(top));
+
+	return surface;
+}