215 lines
7.9 KiB
C++
215 lines
7.9 KiB
C++
#include <catch2/catch.hpp>
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#include <iostream>
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#include <boost/filesystem.hpp>
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#include "libslic3r/ClipperUtils.hpp"
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#include "libslic3r/ExPolygon.hpp"
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#include "libslic3r/SVG.hpp"
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using namespace Slic3r;
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// #define TESTS_EXPORT_SVGS
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SCENARIO("Constant offset", "[ClipperUtils]") {
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coord_t s = 1000000;
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GIVEN("20mm box") {
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ExPolygon box20mm;
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box20mm.contour.points = { Vec2crd{ 0, 0 }, Vec2crd{ 20 * s, 0 }, Vec2crd{ 20 * s, 20 * s}, Vec2crd{ 0, 20 * s} };
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std::vector<float> deltas_plus(box20mm.contour.points.size(), 1. * s);
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std::vector<float> deltas_minus(box20mm.contour.points.size(), - 1. * s);
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Polygons output;
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WHEN("Slic3r::offset()") {
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for (double miter : { 2.0, 1.5, 1.2 }) {
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DYNAMIC_SECTION("plus 1mm, miter " << miter << "x") {
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output = Slic3r::offset(box20mm, 1. * s, ClipperLib::jtMiter, miter);
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#ifdef TESTS_EXPORT_SVGS
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{
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SVG svg(debug_out_path("constant_offset_box20mm_plus1mm_miter%lf.svg", miter).c_str(), get_extents(output));
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svg.draw(box20mm, "blue");
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svg.draw_outline(output, "black", coord_t(scale_(0.01)));
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}
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#endif
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THEN("Area is 22^2mm2") {
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REQUIRE(output.size() == 1);
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REQUIRE(output.front().area() == Approx(22. * 22. * s * s));
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}
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}
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DYNAMIC_SECTION("minus 1mm, miter " << miter << "x") {
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output = Slic3r::offset(box20mm, - 1. * s, ClipperLib::jtMiter, miter);
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#ifdef TESTS_EXPORT_SVGS
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{
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SVG svg(debug_out_path("constant_offset_box20mm_minus1mm_miter%lf.svg", miter).c_str(), get_extents(output));
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svg.draw(box20mm, "blue");
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svg.draw_outline(output, "black", coord_t(scale_(0.01)));
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}
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#endif
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THEN("Area is 18^2mm2") {
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REQUIRE(output.size() == 1);
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REQUIRE(output.front().area() == Approx(18. * 18. * s * s));
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}
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}
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}
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}
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WHEN("Slic3r::variable_offset_outer/inner") {
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for (double miter : { 2.0, 1.5, 1.2 }) {
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DYNAMIC_SECTION("plus 1mm, miter " << miter << "x") {
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output = Slic3r::variable_offset_outer(box20mm, { deltas_plus }, miter);
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#ifdef TESTS_EXPORT_SVGS
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{
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SVG svg(debug_out_path("variable_offset_box20mm_plus1mm_miter%lf.svg", miter).c_str(), get_extents(output));
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svg.draw(box20mm, "blue");
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svg.draw_outline(output, "black", coord_t(scale_(0.01)));
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}
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#endif
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THEN("Area is 22^2mm2") {
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REQUIRE(output.size() == 1);
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REQUIRE(output.front().area() == Approx(22. * 22. * s * s));
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}
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}
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DYNAMIC_SECTION("minus 1mm, miter " << miter << "x") {
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output = Slic3r::variable_offset_inner(box20mm, { deltas_minus }, miter);
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#ifdef TESTS_EXPORT_SVGS
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{
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SVG svg(debug_out_path("variable_offset_box20mm_minus1mm_miter%lf.svg", miter).c_str(), get_extents(output));
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svg.draw(box20mm, "blue");
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svg.draw_outline(output, "black", coord_t(scale_(0.01)));
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}
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#endif
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THEN("Area is 18^2mm2") {
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REQUIRE(output.size() == 1);
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REQUIRE(output.front().area() == Approx(18. * 18. * s * s));
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}
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}
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}
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}
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}
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GIVEN("20mm box with 10mm hole") {
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ExPolygon box20mm;
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box20mm.contour.points = { Vec2crd{ 0, 0 }, Vec2crd{ 20 * s, 0 }, Vec2crd{ 20 * s, 20 * s}, Vec2crd{ 0, 20 * s} };
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box20mm.holes.emplace_back(Slic3r::Polygon({ Vec2crd{ 5 * s, 5 * s }, Vec2crd{ 5 * s, 15 * s}, Vec2crd{ 15 * s, 15 * s}, Vec2crd{ 15 * s, 5 * s } }));
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std::vector<float> deltas_plus(box20mm.contour.points.size(), 1. * s);
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std::vector<float> deltas_minus(box20mm.contour.points.size(), -1. * s);
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ExPolygons output;
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SECTION("Slic3r::offset()") {
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for (double miter : { 2.0, 1.5, 1.2 }) {
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DYNAMIC_SECTION("miter " << miter << "x") {
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WHEN("plus 1mm") {
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output = Slic3r::offset_ex(box20mm, 1. * s, ClipperLib::jtMiter, miter);
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#ifdef TESTS_EXPORT_SVGS
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{
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SVG svg(debug_out_path("constant_offset_box20mm_10mm_hole_plus1mm_miter%lf.svg", miter).c_str(), get_extents(output));
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svg.draw(box20mm, "blue");
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svg.draw_outline(to_polygons(output), "black", coord_t(scale_(0.01)));
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}
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#endif
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THEN("Area is 22^2-8^2 mm2") {
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REQUIRE(output.size() == 1);
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REQUIRE(output.front().area() == Approx((22. * 22. - 8. * 8.) * s * s));
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}
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}
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WHEN("minus 1mm") {
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output = Slic3r::offset_ex(box20mm, - 1. * s, ClipperLib::jtMiter, miter);
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#ifdef TESTS_EXPORT_SVGS
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{
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SVG svg(debug_out_path("constant_offset_box20mm_10mm_hole_minus1mm_miter%lf.svg", miter).c_str(), get_extents(output));
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svg.draw(box20mm, "blue");
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svg.draw_outline(to_polygons(output), "black", coord_t(scale_(0.01)));
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}
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#endif
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THEN("Area is 18^2-12^2 mm2") {
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REQUIRE(output.size() == 1);
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REQUIRE(output.front().area() == Approx((18. * 18. - 12. * 12.) * s * s));
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}
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}
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}
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}
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}
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SECTION("Slic3r::variable_offset_outer()") {
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for (double miter : { 2.0, 1.5, 1.2 }) {
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DYNAMIC_SECTION("miter " << miter << "x") {
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WHEN("plus 1mm") {
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output = Slic3r::variable_offset_outer_ex(box20mm, { deltas_plus, deltas_plus }, miter);
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#ifdef TESTS_EXPORT_SVGS
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{
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SVG svg(debug_out_path("variable_offset_box20mm_10mm_hole_plus1mm_miter%lf.svg", miter).c_str(), get_extents(output));
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svg.draw(box20mm, "blue");
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svg.draw_outline(to_polygons(output), "black", coord_t(scale_(0.01)));
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}
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#endif
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THEN("Area is 22^2-8^2 mm2") {
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REQUIRE(output.size() == 1);
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REQUIRE(output.front().area() == Approx((22. * 22. - 8. * 8.) * s * s));
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}
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}
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WHEN("minus 1mm") {
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output = Slic3r::variable_offset_inner_ex(box20mm, { deltas_minus, deltas_minus }, miter);
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#ifdef TESTS_EXPORT_SVGS
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{
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SVG svg(debug_out_path("variable_offset_box20mm_10mm_hole_minus1mm_miter%lf.svg", miter).c_str(), get_extents(output));
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svg.draw(box20mm, "blue");
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svg.draw_outline(to_polygons(output), "black", coord_t(scale_(0.01)));
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}
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#endif
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THEN("Area is 18^2-12^2 mm2") {
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REQUIRE(output.size() == 1);
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REQUIRE(output.front().area() == Approx((18. * 18. - 12. * 12.) * s * s));
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}
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}
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}
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}
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}
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}
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GIVEN("20mm right angle triangle") {
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ExPolygon triangle20mm;
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triangle20mm.contour.points = { Vec2crd{ 0, 0 }, Vec2crd{ 20 * s, 0 }, Vec2crd{ 0, 20 * s } };
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Polygons output;
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double offset = 1.;
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// Angle of the sharp corner bisector.
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double angle_bisector = M_PI / 8.;
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// Area tapered by mitering one sharp corner.
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double area_tapered = pow(offset * (1. / sin(angle_bisector) - 1.), 2.) * tan(angle_bisector);
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double l_triangle_side_offsetted = 20. + offset * (1. + 1. / tan(angle_bisector));
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double area_offsetted = (0.5 * l_triangle_side_offsetted * l_triangle_side_offsetted - 2. * area_tapered) * s * s;
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SECTION("Slic3r::offset()") {
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for (double miter : { 2.0, 1.5, 1.2 }) {
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DYNAMIC_SECTION("Outer offset 1mm, miter " << miter << "x") {
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output = Slic3r::offset(triangle20mm, offset * s, ClipperLib::jtMiter, 2.0);
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#ifdef TESTS_EXPORT_SVGS
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{
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SVG svg(debug_out_path("constant_offset_triangle20mm_plus1mm_miter%lf.svg", miter).c_str(), get_extents(output));
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svg.draw(triangle20mm, "blue");
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svg.draw_outline(output, "black", coord_t(scale_(0.01)));
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}
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#endif
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THEN("Area matches") {
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REQUIRE(output.size() == 1);
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REQUIRE(output.front().area() == Approx(area_offsetted));
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}
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}
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}
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}
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SECTION("Slic3r::variable_offset_outer()") {
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std::vector<float> deltas(triangle20mm.contour.points.size(), 1. * s);
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for (double miter : { 2.0, 1.5, 1.2 }) {
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DYNAMIC_SECTION("Outer offset 1mm, miter " << miter << "x") {
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output = Slic3r::variable_offset_outer(triangle20mm, { deltas }, 2.0);
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#ifdef TESTS_EXPORT_SVGS
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{
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SVG svg(debug_out_path("variable_offset_triangle20mm_plus1mm_miter%lf.svg", miter).c_str(), get_extents(output));
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svg.draw(triangle20mm, "blue");
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svg.draw_outline(output, "black", coord_t(scale_(0.01)));
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}
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#endif
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THEN("Area matches") {
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REQUIRE(output.size() == 1);
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REQUIRE(output.front().area() == Approx(area_offsetted));
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}
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}
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}
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}
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}
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}
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