Adaptive elephant foot compensation: Improvement of the variable
offset regularization.
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bubnikv
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@ -267,6 +267,91 @@ static inline void smooth_compensation(std::vector<float> &compensation, float s
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}
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}
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template<typename INDEX_TYPE, typename CONTAINER>
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static inline INDEX_TYPE prev_idx_cyclic(INDEX_TYPE idx, const CONTAINER &container)
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{
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if (idx == 0)
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idx = INDEX_TYPE(container.size());
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return -- idx;
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}
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template<typename INDEX_TYPE, typename CONTAINER>
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static inline INDEX_TYPE next_idx_cyclic(INDEX_TYPE idx, const CONTAINER &container)
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{
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if (++ idx == INDEX_TYPE(container.size()))
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idx = 0;
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return idx;
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}
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static inline void smooth_compensation_banded(const Points &contour, float band, std::vector<float> &compensation, float strength, size_t num_iterations)
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{
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assert(contour.size() == compensation.size());
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assert(contour.size() > 2);
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std::vector<float> out(compensation);
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float dist_min2 = band * band;
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static constexpr bool use_min = false;
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for (size_t iter = 0; iter < num_iterations; ++ iter) {
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for (int i = 0; i < int(compensation.size()); ++ i) {
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const Vec2f pthis = contour[i].cast<float>();
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int j = prev_idx_cyclic(i, contour);
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Vec2f pprev = contour[j].cast<float>();
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float prev = compensation[j];
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float l2 = (pthis - pprev).squaredNorm();
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if (l2 < dist_min2) {
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float l = sqrt(l2);
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int jprev = std::exchange(j, prev_idx_cyclic(j, contour));
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while (j != i) {
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const Vec2f pp = contour[j].cast<float>();
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const float lthis = (pp - pprev).norm();
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const float lnext = l + lthis;
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if (lnext > band) {
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// Interpolate the compensation value.
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prev = use_min ?
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std::min(prev, lerp(compensation[jprev], compensation[j], (band - l) / lthis)) :
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lerp(compensation[jprev], compensation[j], (band - l) / lthis);
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break;
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}
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prev = use_min ? std::min(prev, compensation[j]) : compensation[j];
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pprev = pp;
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l = lnext;
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jprev = std::exchange(j, prev_idx_cyclic(j, contour));
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}
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}
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j = next_idx_cyclic(i, contour);
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pprev = contour[j].cast<float>();
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float next = compensation[j];
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l2 = (pprev - pthis).squaredNorm();
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if (l2 < dist_min2) {
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float l = sqrt(l2);
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int jprev = std::exchange(j, next_idx_cyclic(j, contour));
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while (j != i) {
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const Vec2f pp = contour[j].cast<float>();
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const float lthis = (pp - pprev).norm();
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const float lnext = l + lthis;
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if (lnext > band) {
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// Interpolate the compensation value.
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next = use_min ?
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std::min(next, lerp(compensation[jprev], compensation[j], (band - l) / lthis)) :
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lerp(compensation[jprev], compensation[j], (band - l) / lthis);
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break;
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}
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next = use_min ? std::min(next, compensation[j]) : compensation[j];
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pprev = pp;
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l = lnext;
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jprev = std::exchange(j, next_idx_cyclic(j, contour));
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}
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}
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float laplacian = compensation[i] * (1.f - strength) + 0.5f * strength * (prev + next);
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// Compensations are negative. Only apply the laplacian if it leads to lower compensation.
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out[i] = std::max(laplacian, compensation[i]);
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}
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out.swap(compensation);
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}
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}
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ExPolygon elephant_foot_compensation(const ExPolygon &input_expoly, const Flow &external_perimeter_flow, const double compensation)
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{
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// The contour shall be wide enough to apply the external perimeter plus compensation on both sides.
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@ -285,10 +370,11 @@ ExPolygon elephant_foot_compensation(const ExPolygon &input_expoly, const Flow &
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std::vector<std::vector<float>> deltas;
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deltas.reserve(simplified.holes.size() + 1);
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ExPolygon resampled(simplified);
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double resample_interval = scale_(0.5);
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for (size_t idx_contour = 0; idx_contour <= simplified.holes.size(); ++ idx_contour) {
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Polygon &poly = (idx_contour == 0) ? resampled.contour : resampled.holes[idx_contour - 1];
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std::vector<ResampledPoint> resampled_point_parameters;
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poly.points = resample_polygon(poly.points, scale_(0.5), resampled_point_parameters);
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poly.points = resample_polygon(poly.points, resample_interval, resampled_point_parameters);
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std::vector<float> dists = contour_distance(grid, idx_contour, poly.points, resampled_point_parameters, search_radius);
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for (float &d : dists) {
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// printf("Point %d, Distance: %lf\n", int(&d - dists.data()), unscale<double>(d));
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@ -301,7 +387,8 @@ ExPolygon elephant_foot_compensation(const ExPolygon &input_expoly, const Flow &
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d = - (d - float(min_contour_width)) / 2.f;
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assert(d >= - float(scaled_compensation) && d <= 0.f);
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}
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smooth_compensation(dists, 0.4f, 10);
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// smooth_compensation(dists, 0.4f, 10);
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smooth_compensation_banded(poly.points, float(0.8 * resample_interval), dists, 0.3f, 3);
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deltas.emplace_back(dists);
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}
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@ -151,6 +151,75 @@ static ExPolygon thin_ring()
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return out;
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}
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static ExPolygon vase_with_fins()
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{
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ExPolygon out;
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out.contour.points = {
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||||
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||||
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||||
{18457794, 46095035}, {18421769, 46081175}, {18417293, 46079270}, {18394029, 46068716}, {17954603, 45864634}, {17038299, 45440211}, {15550671, 48359845}, {14777498, 49877288}, {14760820, 49910022}, {14026023, 49520291},
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||||
{14020897, 49517572}, {14002491, 49508335}, {16203201, 45189191}, {16222801, 45150724}, {16281880, 45034773}, {15517740, 44583309}, {15510741, 44579261}, {15477328, 44559938}, {15473206, 44557356}, {15451878, 44543292},
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||||
{15049787, 44272982}, {14211153, 43710440}, {12285115, 46361403}, {11284082, 47739206}, {11262488, 47768928}, {10597703, 47269053}, {10593066, 47265566}, {10576332, 47253563}, {13425609, 43331872}, {13450985, 43296945},
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||||
{13527476, 43191664}, {12843352, 42626213}, {12837073, 42621121}, {12807093, 42596808}, {12803426, 42593613}, {12784561, 42576386}, {12429709, 42246502}, {11689410, 41559693}, {9372373, 43876727}, {8168126, 45080975},
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||||
{8142148, 45106952}, {7563757, 44509222}, {7559722, 44505053}, {7545071, 44490581}, {10972747, 41062911}, {11003274, 41032383}, {11095293, 40940365}, {10508063, 40274848}, {10502658, 40268836}, {10476851, 40240132},
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||||
{10473729, 40236403}, {10457791, 40216438}, {10158911, 39835107}, {9535160, 39040950}, {6884192, 40966991}, {5506386, 41968025}, {5476665, 41989618}, {4998885, 41308775}, {4995553, 41304026}, {4983346, 41287439},
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||||
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||||
{4881822, 37703836}, {3364381, 38477011}, {3331647, 38493690}, {2966260, 37746484}, {2963712, 37741272}, {2954250, 37722981}, {7273379, 35522270}, {7311845, 35502670}, {7427796, 35443590}, {7074968, 34629191},
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||||
{7071686, 34621803}, {7056012, 34586530}, {7054194, 34582018}, {7045206, 34558105}, {6878792, 34103076}, {6530980, 33155036}, {3414573, 34167611}, {1794864, 34693885}, {1759924, 34705238}, {1515921, 33910079},
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||||
{1514219, 33904532}, {1507735, 33884986}, {6117964, 32387033}, {6159023, 32373692}, {6282789, 32333479}, {6061704, 31473909}, {6059617, 31466099}, {6049654, 31428807}, {6048565, 31424067}, {6043429, 31399042},
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||||
{5950245, 30923582}, {5755014, 29932799}, {2518579, 30445403}, {836483, 30711821}, {800198, 30717568}, {683591, 29894033}, {682777, 29888288}, {679431, 29867968}, {5467236, 29109657}, {5509877, 29102904}, {5638409, 29082546},
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{5554499, 28198964}, {5553660, 28190923}, {5549653, 28152532}, {5549319, 28147680}, {5548160, 28122159}, {5530507, 27637975}, {5492679, 26628853}, {2215900, 26628853}, {512834, 26628856}, {476096, 26628856}, {489754, 25797218},
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{489850, 25791417}, {489724, 25770824}, {5510510, 25770824}, {5565867, 24884990}, {5566296, 24876916}, {5568344, 24838372}, {5568773, 24833527}, {5571621, 24808139}, {5629923, 24327156}, {5750418, 23324543}, {2513981, 22811940},
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||||
{831886, 22545523}, {795600, 22539776}, {939191, 21720518}, {940192, 21714803}, {943289, 21694443}, {5731087, 22452754}, {5773728, 22459508}, {5902260, 22479865}, {6095512, 21613598}, {6097199, 21605691}, {6105252, 21567942},
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{6106434, 21563224}, {6113218, 21538594}, {6246044, 21072654}, {6521898, 20101231}, {3405493, 19088662}, {1785783, 18562390}, {1750843, 18551037}, {2020831, 17764306}, {2022714, 17758819}, {2028958, 17739194}, {6639187, 19237147},
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||||
{6680246, 19250488}, {6804011, 19290701}, {7130382, 18465339}, {7133285, 18457794}, {7147144, 18421769}, {7149049, 18417293}, {7159603, 18394029}, {7363683, 17954605}, {7788110, 17038301}, {4868477, 15550669}, {3351039, 14777491},
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||||
{3318305, 14760812}, {3708029, 14026016}, {3710747, 14020890}, {3719984, 14002484}, {8039120, 16203201}, {8077586, 16222801}, {8193537, 16281881}, {8645019, 15517733}, {8649067, 15510734}, {8668391, 15477321}, {8670973, 15473199},
|
||||
{8685036, 15451871}, {8955346, 15049780}, {9517887, 14211149}, {6866919, 12285108}, {5489112, 11284075}, {5459391, 11262481}, {5959259, 10597695}, {5962745, 10593058}, {5974747, 10576324}, {9896454, 13425601}, {9931382, 13450977},
|
||||
{10036663, 13527468}, {10602111, 12843352}, {10607203, 12837073}, {10631516, 12807093}, {10634711, 12803426}, {10651937, 12784561}, {10981820, 12429709}, {11668626, 11689407}, {8147345, 8168126}, {8121368, 8142148}, {8719089, 7563749},
|
||||
{8723258, 7559715}, {8737731, 7545064}, {12165414, 10972746}, {12195941, 11003274}, {12287960, 11095293}, {12953467, 10508056}, {12959479, 10502650}, {12988183, 10476843}, {12991912, 10473721}, {13011878, 10457783}, {13393211, 10158903},
|
||||
{14187378, 9535150}, {12261338, 6884179}, {11260306, 5506371}, {11238712, 5476650}, {11919550, 4998885}, {11924299, 4995552}, {11940886, 4983346}, {14790161, 8905032}, {14815537, 8939959}, {14892028, 9045240}, {15641210, 8569348},
|
||||
{15647994, 8564950}, {15680381, 8543951}, {15684553, 8541450}, {15706766, 8528832}, {16130159, 8293285}, {17012123, 7801449}, {15524489, 4881814}, {14751314, 3364373}, {14734635, 3331640}, {15481841, 2966253}, {15487053, 2963704},
|
||||
{15505344, 2954242}, {17706054, 7273386}, {17725654, 7311852}, {17784734, 7427803}, {18599135, 7074961}, {18606523, 7071678}, {18641796, 7056004}, {18646308, 7054187}, {18670222, 7045199}, {19125250, 6878787}, {20073289, 6530975},
|
||||
{19060715, 3414573}, {18534440, 1794864}, {18523088, 1759924}, {19318247, 1515921}, {19323794, 1514219}, {19343340, 1507736}, {20841293, 6117964}, {20854634, 6159023}, {20894848, 6282789}, {21754417, 6061696}, {21762228, 6059609},
|
||||
{21799518, 6049647}, {21804259, 6048557}, {21829284, 6043421}, {22304743, 5950237}, {23295525, 5755007}, {22782917, 2518572}, {22516497, 836476}, {22510750, 800190}, {23334299, 683591}, {23340043, 682777}, {23360363, 679431},
|
||||
{24118676, 5467229}, {24125430, 5509869}, {24145787, 5638402}, {25029368, 5554507}, {25037409, 5553668}, {25075799, 5549661}, {25080652, 5549327}, {25106172, 5548168}, {25590355, 5530509}, {26599476, 5492671}, {26599476, 476096}
|
||||
};
|
||||
return out;
|
||||
}
|
||||
|
||||
SCENARIO("Elephant foot compensation", "[ElephantFoot]") {
|
||||
|
||||
GIVEN("Large box") {
|
||||
@ -293,6 +362,21 @@ SCENARIO("Elephant foot compensation", "[ElephantFoot]") {
|
||||
SVG::export_expolygons(debug_out_path("elephant_foot_compensation_4.svg").c_str(),
|
||||
{ { { expoly }, { "gray", "black", "blue", coord_t(scale_(0.02)), 0.5f, "black", coord_t(scale_(0.05)) } },
|
||||
{ { expoly_compensated }, { "gray", "black", "blue", coord_t(scale_(0.02)), 0.5f, "black", coord_t(scale_(0.05)) } } });
|
||||
#endif /* TESTS_EXPORT_SVGS */
|
||||
THEN("area of the compensated polygon is smaller") {
|
||||
REQUIRE(expoly_compensated.area() < expoly.area());
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
GIVEN("Vase with fins") {
|
||||
ExPolygon expoly = vase_with_fins();
|
||||
WHEN("Compensated") {
|
||||
ExPolygon expoly_compensated = elephant_foot_compensation(expoly, Flow(0.419999987f, 0.2f, 0.4f, false), 0.41f);
|
||||
#ifdef TESTS_EXPORT_SVGS
|
||||
SVG::export_expolygons(debug_out_path("elephant_foot_compensation_vase_with_fins.svg").c_str(),
|
||||
{ { { expoly }, { "gray", "black", "blue", coord_t(scale_(0.02)), 0.5f, "black", coord_t(scale_(0.05)) } },
|
||||
{ { expoly_compensated }, { "gray", "black", "blue", coord_t(scale_(0.02)), 0.5f, "black", coord_t(scale_(0.05)) } } });
|
||||
#endif /* TESTS_EXPORT_SVGS */
|
||||
THEN("area of the compensated polygon is smaller") {
|
||||
REQUIRE(expoly_compensated.area() < expoly.area());
|
||||
|
||||
Loading…
Reference in New Issue
Block a user