Starting to port 01_trianglemesh tests to Catch.

src/CMakeLists.txt

@@ -187,6 +187,7 @@ set(UI_TEST_SOURCES
 )
 set(SLIC3R_TEST_SOURCES
     ${TESTDIR}/test_harness.cpp
+    ${TESTDIR}/libslic3r/test_trianglemesh.cpp
 )
 add_executable(slic3r slic3r.cpp)
 #set_target_properties(slic3r PROPERTIES LINK_SEARCH_START_STATIC 1)

src/test/libslic3r/test_trianglemesh.cpp

@@ -0,0 +1,96 @@
+#include <catch.hpp>
+
+#include "TriangleMesh.hpp"
+#include "Point.hpp"
+
+using namespace Slic3r;
+
+SCENARIO( "TriangleMesh: Basic mesh statistics") {
+    GIVEN( "A 20mm cube with one corner on the origin") {
+        const Pointf3s vertices { Pointf3(20,20,0), Pointf3(20,0,0), Pointf3(0,0,0), Pointf3(0,20,0), Pointf3(20,20,20), Pointf3(0,20,20), Pointf3(0,0,20), Pointf3(20,0,20) };
+        const Point3s facets { Point3(0,1,2), Point3(0,2,3), Point3(4,5,6), Point3(4,6,7), Point3(0,4,7), Point3(0,7,1), Point3(1,7,6), Point3(1,6,2), Point3(2,6,5), Point3(2,5,3), Point3(4,0,3), Point3(4,3,5) };
+
+        auto* cube {new TriangleMesh(vertices, facets)};
+        cube->repair();
+
+        THEN( "Volume is appropriate for 20mm square cube.") {
+            REQUIRE(abs(cube->volume() - 20.0*20.0*20.0) < 1e-2);
+        }
+
+        THEN( "Vertices array matches input.") {
+            for (auto i = 0U; i < cube->vertices().size(); i++) {
+                REQUIRE(cube->vertices().at(i) == vertices.at(i));
+            }
+            for (auto i = 0U; i < vertices.size(); i++) {
+                REQUIRE(vertices.at(i) == cube->vertices().at(i));
+            }
+        }
+        THEN( "Vertex count matches vertex array size.") {
+            REQUIRE(cube->facets_count() == facets.size());
+        }
+
+        THEN( "Facet array matches input.") {
+            for (auto i = 0U; i < cube->facets().size(); i++) {
+                REQUIRE(cube->facets().at(i) == facets.at(i));
+            }
+
+            for (auto i = 0U; i < facets.size(); i++) {
+                REQUIRE(facets.at(i) == cube->facets().at(i));
+            }
+        }
+        THEN( "Facet count matches facet array size.") {
+            REQUIRE(cube->facets_count() == facets.size());
+        }
+
+        THEN( "Number of normals is equal to the number of facets.") {
+            REQUIRE(cube->normals().size() == facets.size());
+        }
+
+        delete cube;
+    }
+}
+
+SCENARIO( "TriangleMesh: Transformation functions affect mesh as expected.") {
+    GIVEN( "A 20mm cube with one corner on the origin") {
+        const Pointf3s vertices { Pointf3(20,20,0), Pointf3(20,0,0), Pointf3(0,0,0), Pointf3(0,20,0), Pointf3(20,20,20), Pointf3(0,20,20), Pointf3(0,0,20), Pointf3(20,0,20) };
+        const std::vector<Point3> facets { Point3(0,1,2), Point3(0,2,3), Point3(4,5,6), Point3(4,6,7), Point3(0,4,7), Point3(0,7,1), Point3(1,7,6), Point3(1,6,2), Point3(2,6,5), Point3(2,5,3), Point3(4,0,3), Point3(4,3,5) };
+        auto* cube {new TriangleMesh(vertices, facets)};
+        cube->repair();
+        WHEN( "The cube is scaled 200\%") {
+            THEN( "The volume is equivalent to 40x40x40 (all dimensions increased by 200\%") {
+                REQUIRE(false); // TODO
+            }
+        }
+        WHEN( "The cube is scaled 200\% in the X direction") {
+            THEN( "The volume is doubled.") {
+                REQUIRE(false); // TODO
+            }
+            THEN( "The X coordinate size is 200\%.") {
+                REQUIRE(false); // TODO
+            }
+        }
+        WHEN( "The cube is scaled 50\% in the X direction") {
+            THEN( "The volume is doubled.") {
+                REQUIRE(false); // TODO
+            }
+            THEN( "The X coordinate size is 50\%.") {
+                REQUIRE(false); // TODO
+            }
+        }
+
+        WHEN( "The scaled cube is rotated 45 degrees.") {
+            THEN( "The X component of the size is sqrt(2)*40") {
+                REQUIRE(false); // TODO
+            }
+        }
+    }
+
+}
+
+SCENARIO( "TriangleMesh: split function functionality.") {
+    REQUIRE(false); // TODO
+}
+
+SCENARIO( "make_xxx functions produce meshes.") {
+    REQUIRE(false); // TODO
+}