Prusa 2.7.2

tests/libslic3r/test_line.cpp

@@ -0,0 +1,59 @@
+/**
+ * Ported from xs/t/10_line.t
+ */
+
+#include <catch2/catch.hpp>
+#include <libslic3r/Line.hpp>
+#include "test_utils.hpp"
+
+using namespace Slic3r;
+
+TEST_CASE("Line can be translated", "[Line]") {
+    Line line{{100, 100}, {200, 100}};
+
+    line.translate(10, -5);
+    CHECK(Points{line.a, line.b} == Points{{110, 95}, {210, 95}});
+}
+
+TEST_CASE("Check if lines are parallel", "[Line]") {
+    CHECK(Line{{0, 0}, {100, 0}}.parallel_to(Line{{200, 200}, {0, 200}}));
+}
+
+TEST_CASE("Parallel lines under angles", "[Line]") {
+    auto base_angle = GENERATE(0, M_PI/3, M_PI/2, M_PI);
+
+    Line line{{0, 0}, {100, 0}};
+    line.rotate(base_angle, {0, 0});
+    Line clone{line};
+
+    INFO("Line is parallel to self");
+    CHECK(line.parallel_to(clone));
+
+    clone.reverse();
+    INFO("Line is parallel to self + PI");
+    CHECK(line.parallel_to(clone));
+
+    INFO("Line is parallel to its direction");
+    CHECK(line.parallel_to(line.direction()));
+    INFO("Line is parallel to its direction + PI");
+    line.parallel_to(line.direction() + M_PI);
+    INFO("line is parallel to its direction - PI")
+    line.parallel_to(line.direction() - M_PI);
+
+    SECTION("Line is parallel within epsilon") {
+        clone = line;
+        clone.rotate(EPSILON/2, {0, 0});
+        CHECK(line.parallel_to(clone));
+        clone = line;
+        clone.rotate(-EPSILON/2, {0, 0});
+        CHECK(line.parallel_to(clone));
+    }
+}
+
+TEST_CASE("Intersection infinite", "[Line]") {
+    const Line a{{100, 0}, {200, 0}};
+    const Line b{{300, 300}, {300, 100}};
+    Point r;
+    a.intersection_infinite(b, &r);
+    CHECK(r == Point{300, 0});
+}