mirror of
https://github.com/OrcaSlicer/OrcaSlicer.git
synced 2026-10-04 22:31:02 +00:00
HanifKoh
8a6377f087
* Add Missing Includes Across src/libslic3r Every libslic3r source and header now directly includes the headers declaring what it uses, rather than relying on the precompiled header or transitive includes. Generated with clang-tidy misc-include-cleaner, with libslic3r headers spelled libslic3r/... so they resolve outside the library's private include paths. MultiMaterialSegmentation.hpp, Support/SupportParameters.hpp and Format/STEP.hpp are made self-contained by hand. * Make the libslic3r Headers Compile on Their Own Each now includes, or forward-declares, what it uses instead of relying on what its includers happened to include first. Left out: I18N.hpp, which errors on purpose when included from GUI code, and VoxelizeCSGMesh.hpp and SLA/bicubic.h, which nothing includes and which no longer compile at all. * Add the Includes Missing From the Hand-Fixed libslic3r Headers clang-tidy would not edit these headers while they failed to compile on their own, so the first pass skipped them. With the headers now self-contained, a second pass adds the rest. * Keep Windows Setup Ahead of the Added libslic3r Includes Print.cpp and Thread.cpp open with a _WIN32 block that has to come first; without the precompiled header, Print.cpp otherwise reaches windows.h through OCCT with NONLS defined and boost/regex fails. OpenVDBUtils.cpp and SLA/SupportTreeBuilder.cpp had includes inside #ifndef NOMINMAX, which libslic3r defines on Windows, so those were skipped there. .clang-tidy also ignores the MSVC STL and UCRT internals, Boost.Multiprecision's fwd.hpp and CPython's Windows include directory. * Re-Add libslic3r Includes After the Clipper2 2.0.1 Migration Rebasing onto main took main's version of the files the Clipper2 migration rewrote, so their added includes are restored here, along with includes for main's new code. Clipper2's individual headers are now ignored by clang-tidy: they only build the Z variant through clipper2_z.hpp, which defines USINGZ first, so including clipper.core.h and the like directly broke ClipperZUtils.cpp.
533 lines
19 KiB
C++
533 lines
19 KiB
C++
#include "ColorDecomposeRecipe.hpp"
|
|
|
|
#include "FilamentMixer.hpp"
|
|
#include "Utils.hpp"
|
|
#include "nlohmann/json.hpp"
|
|
|
|
#include <algorithm>
|
|
#include <cmath>
|
|
#include <cstdio>
|
|
#include <fstream>
|
|
#include <limits>
|
|
#include <string>
|
|
#include <utility>
|
|
#include <vector>
|
|
|
|
namespace Slic3r {
|
|
namespace {
|
|
|
|
struct LabColor {
|
|
double l{0.0};
|
|
double a{0.0};
|
|
double b{0.0};
|
|
};
|
|
|
|
struct StandardRecipeEntry {
|
|
ColorDecomposeRecipeMode mode{ColorDecomposeRecipeMode::CMYW};
|
|
std::string material;
|
|
std::string source;
|
|
std::vector<std::string> component_keys;
|
|
std::vector<std::string> component_hexes;
|
|
std::vector<int> ratios;
|
|
std::string measured_hex;
|
|
LabColor measured_lab;
|
|
};
|
|
|
|
static double srgb_to_linear(double v)
|
|
{
|
|
v /= 255.0;
|
|
return v <= 0.04045 ? v / 12.92 : std::pow((v + 0.055) / 1.055, 2.4);
|
|
}
|
|
|
|
static double xyz_to_lab_component(double v)
|
|
{
|
|
constexpr double eps = 216.0 / 24389.0;
|
|
constexpr double kappa = 24389.0 / 27.0;
|
|
return v > eps ? std::cbrt(v) : (kappa * v + 16.0) / 116.0;
|
|
}
|
|
|
|
static LabColor rgb_to_lab(const ColorDecomposeRgb& rgb)
|
|
{
|
|
const double r = srgb_to_linear(rgb.r);
|
|
const double g = srgb_to_linear(rgb.g);
|
|
const double b = srgb_to_linear(rgb.b);
|
|
|
|
const double x = (0.4124564 * r + 0.3575761 * g + 0.1804375 * b) / 0.95047;
|
|
const double y = (0.2126729 * r + 0.7151522 * g + 0.0721750 * b);
|
|
const double z = (0.0193339 * r + 0.1191920 * g + 0.9503041 * b) / 1.08883;
|
|
|
|
const double fx = xyz_to_lab_component(x);
|
|
const double fy = xyz_to_lab_component(y);
|
|
const double fz = xyz_to_lab_component(z);
|
|
|
|
return {116.0 * fy - 16.0, 500.0 * (fx - fy), 200.0 * (fy - fz)};
|
|
}
|
|
|
|
static std::string lab_to_srgb_hex(const LabColor& lab)
|
|
{
|
|
constexpr double Xn = 0.95047, Yn = 1.0, Zn = 1.08883;
|
|
|
|
auto f_inv = [](double t) -> double {
|
|
constexpr double eps = 216.0 / 24389.0;
|
|
constexpr double kappa = 24389.0 / 27.0;
|
|
const double t3 = t * t * t;
|
|
return t3 > eps ? t3 : (t * 116.0 - 16.0) / kappa;
|
|
};
|
|
|
|
const double fy = (lab.l + 16.0) / 116.0;
|
|
const double fx = lab.a / 500.0 + fy;
|
|
const double fz = fy - lab.b / 200.0;
|
|
|
|
const double X = Xn * f_inv(fx);
|
|
const double Y = Yn * f_inv(fy);
|
|
const double Z = Zn * f_inv(fz);
|
|
|
|
double r = 3.2406 * X - 1.5372 * Y - 0.4986 * Z;
|
|
double g = -0.9689 * X + 1.8758 * Y + 0.0415 * Z;
|
|
double b = 0.0557 * X - 0.2040 * Y + 1.0570 * Z;
|
|
|
|
auto gamma = [](double c) -> double {
|
|
c = std::max(0.0, std::min(1.0, c));
|
|
return c <= 0.0031308 ? 12.92 * c : 1.055 * std::pow(c, 1.0 / 2.4) - 0.055;
|
|
};
|
|
auto u8 = [&](double c) -> int {
|
|
return std::max(0, std::min(255, static_cast<int>(std::lround(gamma(c) * 255.0))));
|
|
};
|
|
|
|
char buf[8];
|
|
std::snprintf(buf, sizeof(buf), "#%02X%02X%02X", u8(r), u8(g), u8(b));
|
|
return std::string(buf);
|
|
}
|
|
|
|
static double delta_e76(const LabColor& a, const LabColor& b)
|
|
{
|
|
return std::sqrt(std::pow(a.l - b.l, 2.0) + std::pow(a.a - b.a, 2.0) + std::pow(a.b - b.b, 2.0));
|
|
}
|
|
|
|
static bool material_matches(const std::string& a, const std::string& b)
|
|
{
|
|
if (a.empty() || b.empty())
|
|
return false;
|
|
return a == b || a == b + " Basic" || b == a + " Basic";
|
|
}
|
|
|
|
static std::vector<std::vector<int>> ratio_grid(size_t n)
|
|
{
|
|
std::vector<std::vector<int>> out;
|
|
if (n == 2) {
|
|
for (int a = 20; a <= 80; a += 5)
|
|
out.push_back({a, 100 - a});
|
|
} else if (n == 3) {
|
|
for (int a = 20; a <= 60; a += 5)
|
|
for (int b = 20; b <= 80 - a; b += 5) {
|
|
const int c = 100 - a - b;
|
|
if (c >= 20)
|
|
out.push_back({a, b, c});
|
|
}
|
|
}
|
|
return out;
|
|
}
|
|
|
|
static ColorDecomposeRecipeMode parse_mode(const std::string& s)
|
|
{
|
|
if (s == "RYBW" || s == "RGBY")
|
|
return ColorDecomposeRecipeMode::RYBW;
|
|
return ColorDecomposeRecipeMode::CMYW;
|
|
}
|
|
|
|
static std::vector<StandardRecipeEntry> load_standard_entries()
|
|
{
|
|
std::vector<StandardRecipeEntry> entries;
|
|
const std::string path = resources_dir() + "/filament_mixing/standard_color_recipes.json";
|
|
std::ifstream ifs(path);
|
|
if (!ifs)
|
|
return entries;
|
|
|
|
nlohmann::json root = nlohmann::json::parse(ifs, nullptr, false);
|
|
if (root.is_discarded() || !root.contains("entries") || !root["entries"].is_array())
|
|
return entries;
|
|
|
|
for (const auto& item : root["entries"]) {
|
|
if (!item.is_object())
|
|
continue;
|
|
StandardRecipeEntry entry;
|
|
entry.mode = parse_mode(item.value("mode", "CMYW"));
|
|
entry.material = item.value("material", "");
|
|
entry.source = item.value("source", "");
|
|
entry.measured_hex = item.value("measured_rgb", "");
|
|
|
|
if (item.contains("components") && item["components"].is_array()) {
|
|
for (const auto& comp : item["components"]) {
|
|
if (comp.is_object()) {
|
|
entry.component_keys.push_back(comp.value("key", ""));
|
|
entry.component_hexes.push_back(comp.value("rgb", ""));
|
|
}
|
|
}
|
|
}
|
|
if (item.contains("ratios") && item["ratios"].is_array()) {
|
|
for (const auto& ratio : item["ratios"]) {
|
|
if (ratio.is_number_integer())
|
|
entry.ratios.push_back(ratio.get<int>());
|
|
}
|
|
}
|
|
if (item.contains("measured_lab") && item["measured_lab"].is_array() && item["measured_lab"].size() >= 3) {
|
|
entry.measured_lab = {
|
|
item["measured_lab"][0].get<double>(),
|
|
item["measured_lab"][1].get<double>(),
|
|
item["measured_lab"][2].get<double>()
|
|
};
|
|
} else {
|
|
ColorDecomposeRgb measured_rgb;
|
|
if (!color_decompose_hex_to_rgb(entry.measured_hex, measured_rgb))
|
|
continue;
|
|
entry.measured_lab = rgb_to_lab(measured_rgb);
|
|
}
|
|
|
|
if (entry.component_hexes.size() >= 2 && entry.component_hexes.size() == entry.ratios.size() &&
|
|
!entry.measured_hex.empty())
|
|
entries.push_back(std::move(entry));
|
|
}
|
|
return entries;
|
|
}
|
|
|
|
static const std::vector<StandardRecipeEntry>& standard_entries()
|
|
{
|
|
static const std::vector<StandardRecipeEntry> entries = load_standard_entries();
|
|
return entries;
|
|
}
|
|
|
|
static void evaluate_candidate(const ColorDecomposeRgb& target,
|
|
const std::vector<std::string>& hexes,
|
|
const std::vector<int>& ratios,
|
|
const std::vector<unsigned int>& indices,
|
|
ColorDecomposeRecipeMode mode,
|
|
double& best_score,
|
|
ColorDecomposeRecipeResult& best)
|
|
{
|
|
const std::string mixed = blend_color_multi(hexes, ratios);
|
|
ColorDecomposeRgb mixed_rgb;
|
|
if (!color_decompose_hex_to_rgb(mixed, mixed_rgb))
|
|
return;
|
|
|
|
const double score = delta_e76(rgb_to_lab(target), rgb_to_lab(mixed_rgb));
|
|
if (score >= best_score)
|
|
return;
|
|
|
|
best_score = score;
|
|
best.valid = true;
|
|
best.mode = mode;
|
|
best.matched_color_hex = mixed;
|
|
best.components.clear();
|
|
for (size_t i = 0; i < hexes.size(); ++i) {
|
|
ColorDecomposeRecipeComponent comp;
|
|
comp.color_hex = hexes[i];
|
|
comp.ratio = ratios[i];
|
|
comp.filament_index = i < indices.size() ? indices[i] : 0;
|
|
best.components.push_back(comp);
|
|
}
|
|
}
|
|
|
|
} // namespace
|
|
|
|
std::string color_decompose_rgb_to_hex(const ColorDecomposeRgb& rgb)
|
|
{
|
|
char buf[8];
|
|
std::snprintf(buf, sizeof(buf), "#%02X%02X%02X", rgb.r, rgb.g, rgb.b);
|
|
return std::string(buf);
|
|
}
|
|
|
|
bool color_decompose_hex_to_rgb(const std::string& hex, ColorDecomposeRgb& out)
|
|
{
|
|
if (hex.size() < 7 || hex[0] != '#')
|
|
return false;
|
|
unsigned r = 0, g = 0, b = 0;
|
|
if (std::sscanf(hex.c_str(), "#%02x%02x%02x", &r, &g, &b) != 3)
|
|
return false;
|
|
out = {static_cast<unsigned char>(r), static_cast<unsigned char>(g), static_cast<unsigned char>(b)};
|
|
return true;
|
|
}
|
|
|
|
ColorDecomposeRecipeResult recommend_from_physical_filaments(
|
|
const ColorDecomposeRgb& target,
|
|
const std::vector<ColorDecomposePhysicalFilament>& physical_filaments,
|
|
const std::string& preferred_material_type)
|
|
{
|
|
std::vector<ColorDecomposePhysicalFilament> candidates;
|
|
for (const auto& filament : physical_filaments) {
|
|
if (filament.is_mixed)
|
|
continue;
|
|
ColorDecomposeRgb ignored;
|
|
if (!color_decompose_hex_to_rgb(filament.color_hex, ignored))
|
|
continue;
|
|
if (preferred_material_type.empty() || material_matches(filament.type, preferred_material_type))
|
|
candidates.push_back(filament);
|
|
}
|
|
|
|
// Early exit: if a material-matched candidate has the exact target color,
|
|
// return it as 100%. Downstream rejects single-component results (no mixed
|
|
// slot created), which is correct -- the color already exists.
|
|
const std::string target_hex = color_decompose_rgb_to_hex(target);
|
|
for (const auto& cand : candidates) {
|
|
ColorDecomposeRgb cand_rgb;
|
|
if (!color_decompose_hex_to_rgb(cand.color_hex, cand_rgb))
|
|
continue;
|
|
if (color_decompose_rgb_to_hex(cand_rgb) == target_hex) {
|
|
ColorDecomposeRecipeResult exact;
|
|
exact.valid = true;
|
|
exact.mode = ColorDecomposeRecipeMode::MaterialList;
|
|
exact.matched_color_hex = cand.color_hex;
|
|
ColorDecomposeRecipeComponent comp;
|
|
comp.color_hex = cand.color_hex;
|
|
comp.ratio = 100;
|
|
comp.filament_index = cand.filament_index;
|
|
exact.components.push_back(comp);
|
|
return exact;
|
|
}
|
|
}
|
|
|
|
if (candidates.size() < 2)
|
|
candidates = physical_filaments;
|
|
candidates.erase(std::remove_if(candidates.begin(), candidates.end(), [](const auto& filament) {
|
|
if (filament.is_mixed)
|
|
return true;
|
|
ColorDecomposeRgb ignored;
|
|
return !color_decompose_hex_to_rgb(filament.color_hex, ignored);
|
|
}), candidates.end());
|
|
|
|
constexpr size_t kMaxCandidates = 8;
|
|
if (candidates.size() > kMaxCandidates) {
|
|
const LabColor target_lab = rgb_to_lab(target);
|
|
std::sort(candidates.begin(), candidates.end(),
|
|
[&target_lab](const ColorDecomposePhysicalFilament& a, const ColorDecomposePhysicalFilament& b) {
|
|
ColorDecomposeRgb rgb_a, rgb_b;
|
|
color_decompose_hex_to_rgb(a.color_hex, rgb_a);
|
|
color_decompose_hex_to_rgb(b.color_hex, rgb_b);
|
|
return delta_e76(target_lab, rgb_to_lab(rgb_a))
|
|
< delta_e76(target_lab, rgb_to_lab(rgb_b));
|
|
});
|
|
candidates.resize(kMaxCandidates);
|
|
}
|
|
|
|
ColorDecomposeRecipeResult best;
|
|
double best_score = std::numeric_limits<double>::max();
|
|
|
|
for (size_t i = 0; i < candidates.size(); ++i) {
|
|
for (size_t j = i + 1; j < candidates.size(); ++j) {
|
|
const std::vector<std::string> hexes = {candidates[i].color_hex, candidates[j].color_hex};
|
|
const std::vector<unsigned int> indices = {candidates[i].filament_index, candidates[j].filament_index};
|
|
for (const auto& ratios : ratio_grid(2))
|
|
evaluate_candidate(target, hexes, ratios, indices, ColorDecomposeRecipeMode::MaterialList, best_score, best);
|
|
|
|
for (size_t k = j + 1; k < candidates.size(); ++k) {
|
|
const std::vector<std::string> hexes3 = {candidates[i].color_hex, candidates[j].color_hex, candidates[k].color_hex};
|
|
const std::vector<unsigned int> indices3 = {candidates[i].filament_index, candidates[j].filament_index, candidates[k].filament_index};
|
|
for (const auto& ratios : ratio_grid(3))
|
|
evaluate_candidate(target, hexes3, ratios, indices3, ColorDecomposeRecipeMode::MaterialList, best_score, best);
|
|
}
|
|
}
|
|
}
|
|
|
|
return best;
|
|
}
|
|
|
|
ColorDecomposeRecipeResult lookup_standard_recipe(
|
|
const ColorDecomposeRgb& target,
|
|
ColorDecomposeRecipeMode mode,
|
|
const std::string& preferred_material_type)
|
|
{
|
|
const LabColor target_lab = rgb_to_lab(target);
|
|
ColorDecomposeRecipeResult best;
|
|
double best_score = std::numeric_limits<double>::max();
|
|
|
|
auto consider = [&](bool require_material_match) {
|
|
for (const StandardRecipeEntry& entry : standard_entries()) {
|
|
if (entry.mode != mode)
|
|
continue;
|
|
if (require_material_match && !material_matches(entry.material, preferred_material_type))
|
|
continue;
|
|
if (!require_material_match && !preferred_material_type.empty() && material_matches(entry.material, preferred_material_type))
|
|
continue;
|
|
|
|
const double score = delta_e76(target_lab, entry.measured_lab);
|
|
if (score >= best_score)
|
|
continue;
|
|
|
|
best_score = score;
|
|
best.valid = true;
|
|
best.mode = mode;
|
|
best.matched_color_hex = entry.measured_hex;
|
|
best.components.clear();
|
|
for (size_t i = 0; i < entry.component_hexes.size(); ++i) {
|
|
ColorDecomposeRecipeComponent comp;
|
|
comp.color_hex = entry.component_hexes[i];
|
|
comp.base_color = i < entry.component_keys.size() ? entry.component_keys[i] : "";
|
|
comp.ratio = entry.ratios[i];
|
|
comp.filament_index = 0;
|
|
best.components.push_back(comp);
|
|
}
|
|
}
|
|
};
|
|
|
|
consider(true);
|
|
if (!best.valid)
|
|
consider(false);
|
|
return best;
|
|
}
|
|
|
|
std::string lookup_measured_blend_color(const std::vector<std::string>& component_hexes,
|
|
const std::vector<int>& ratios)
|
|
{
|
|
if (component_hexes.size() < 2 || component_hexes.size() != ratios.size())
|
|
return {};
|
|
|
|
auto normalize_hex = [](const std::string& hex) -> std::string {
|
|
ColorDecomposeRgb rgb;
|
|
if (!color_decompose_hex_to_rgb(hex, rgb))
|
|
return {};
|
|
char buf[8];
|
|
std::snprintf(buf, sizeof(buf), "#%02X%02X%02X", rgb.r, rgb.g, rgb.b);
|
|
return std::string(buf);
|
|
};
|
|
|
|
// Stage 1: canonicalize input by sorting (hex, ratio) pairs so matching
|
|
// is independent of the caller's component order.
|
|
const size_t n = component_hexes.size();
|
|
std::vector<std::pair<std::string, int>> in_pairs;
|
|
in_pairs.reserve(n);
|
|
for (size_t i = 0; i < n; ++i) {
|
|
std::string nh = normalize_hex(component_hexes[i]);
|
|
if (nh.empty())
|
|
return {};
|
|
in_pairs.emplace_back(std::move(nh), ratios[i]);
|
|
}
|
|
std::sort(in_pairs.begin(), in_pairs.end());
|
|
|
|
std::vector<std::string> in_hexes;
|
|
std::vector<int> in_ratios;
|
|
in_hexes.reserve(n);
|
|
in_ratios.reserve(n);
|
|
for (const auto& p : in_pairs) {
|
|
in_hexes.push_back(p.first);
|
|
in_ratios.push_back(p.second);
|
|
}
|
|
|
|
// Normalize ratios to sum=100 (callers may pass arbitrary weights,
|
|
// e.g. MixedFilamentDialog uses ratio*10000).
|
|
{
|
|
int sum = 0;
|
|
for (int r : in_ratios) sum += r;
|
|
if (sum > 0 && sum != 100) {
|
|
int new_sum = 0;
|
|
for (size_t i = 0; i < in_ratios.size(); ++i) {
|
|
in_ratios[i] = static_cast<int>(std::lround(
|
|
static_cast<double>(in_ratios[i]) * 100.0 / static_cast<double>(sum)));
|
|
new_sum += in_ratios[i];
|
|
}
|
|
if (new_sum != 100) {
|
|
auto it = std::max_element(in_ratios.begin(), in_ratios.end());
|
|
*it += (100 - new_sum);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Fall back to polynomial model for ratios outside the measured range.
|
|
{
|
|
bool out_of_range = false;
|
|
if (n == 2) {
|
|
for (int r : in_ratios)
|
|
if (r < 20 || r > 80) { out_of_range = true; break; }
|
|
} else {
|
|
for (int r : in_ratios)
|
|
if (r < 20) { out_of_range = true; break; }
|
|
}
|
|
if (out_of_range)
|
|
return {};
|
|
}
|
|
|
|
// Stage 2: collect anchors with the same component hex set; try exact match.
|
|
struct Anchor {
|
|
std::vector<int> ratios;
|
|
LabColor lab;
|
|
std::string hex;
|
|
};
|
|
std::vector<Anchor> anchors;
|
|
|
|
for (const StandardRecipeEntry& entry : standard_entries()) {
|
|
if (entry.source != "measured" && entry.source != "interpolated")
|
|
continue;
|
|
if (entry.component_hexes.size() != n)
|
|
continue;
|
|
|
|
std::vector<std::pair<std::string, int>> e_pairs;
|
|
e_pairs.reserve(n);
|
|
for (size_t i = 0; i < n; ++i)
|
|
e_pairs.emplace_back(normalize_hex(entry.component_hexes[i]), entry.ratios[i]);
|
|
std::sort(e_pairs.begin(), e_pairs.end());
|
|
|
|
bool same_set = true;
|
|
for (size_t i = 0; i < n; ++i)
|
|
if (e_pairs[i].first != in_hexes[i]) { same_set = false; break; }
|
|
if (!same_set)
|
|
continue;
|
|
|
|
Anchor a;
|
|
a.ratios.reserve(n);
|
|
for (const auto& p : e_pairs) a.ratios.push_back(p.second);
|
|
a.lab = entry.measured_lab;
|
|
a.hex = entry.measured_hex;
|
|
|
|
if (a.ratios == in_ratios)
|
|
return a.hex;
|
|
|
|
anchors.push_back(std::move(a));
|
|
}
|
|
|
|
if (anchors.size() < 2)
|
|
return {};
|
|
|
|
// Stage 3: interpolation in Lab space.
|
|
if (n == 2) {
|
|
// 1D linear interpolation along ratio[0].
|
|
std::sort(anchors.begin(), anchors.end(),
|
|
[](const Anchor& a, const Anchor& b) { return a.ratios[0] < b.ratios[0]; });
|
|
const double x = static_cast<double>(in_ratios[0]);
|
|
size_t lo = 0;
|
|
while (lo + 2 < anchors.size() && static_cast<double>(anchors[lo + 1].ratios[0]) <= x)
|
|
++lo;
|
|
const Anchor& a0 = anchors[lo];
|
|
const Anchor& a1 = anchors[lo + 1];
|
|
const double span = static_cast<double>(a1.ratios[0] - a0.ratios[0]);
|
|
const double t = span > 0.0 ? (x - static_cast<double>(a0.ratios[0])) / span : 0.0;
|
|
return lab_to_srgb_hex({a0.lab.l + t * (a1.lab.l - a0.lab.l),
|
|
a0.lab.a + t * (a1.lab.a - a0.lab.a),
|
|
a0.lab.b + t * (a1.lab.b - a0.lab.b)});
|
|
}
|
|
|
|
// 3+ color: IDW (p=2) with 3 nearest anchors in the (ratio[0], ratio[1]) plane.
|
|
const double ra = static_cast<double>(in_ratios[0]);
|
|
const double rb = static_cast<double>(in_ratios[1]);
|
|
std::vector<std::pair<double, const Anchor*>> dists;
|
|
dists.reserve(anchors.size());
|
|
for (const Anchor& a : anchors) {
|
|
const double d = std::sqrt(std::pow(ra - static_cast<double>(a.ratios[0]), 2.0) +
|
|
std::pow(rb - static_cast<double>(a.ratios[1]), 2.0));
|
|
if (d == 0.0)
|
|
return a.hex;
|
|
dists.emplace_back(d, &a);
|
|
}
|
|
const size_t k = std::min(static_cast<size_t>(3), dists.size());
|
|
std::partial_sort(dists.begin(), dists.begin() + k, dists.end(),
|
|
[](const auto& a, const auto& b) { return a.first < b.first; });
|
|
double num_l = 0.0, num_a = 0.0, num_b = 0.0, den = 0.0;
|
|
for (size_t j = 0; j < k; ++j) {
|
|
const double w = 1.0 / (dists[j].first * dists[j].first);
|
|
num_l += w * dists[j].second->lab.l;
|
|
num_a += w * dists[j].second->lab.a;
|
|
num_b += w * dists[j].second->lab.b;
|
|
den += w;
|
|
}
|
|
return lab_to_srgb_hex({num_l / den, num_a / den, num_b / den});
|
|
}
|
|
|
|
} // namespace Slic3r
|