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Merge pull request openscad#5577 from openscad/3mf-export-dialog
Add export dialog for 3MF.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,101 @@ | ||
| #include "core/ColorUtil.h" | ||
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| namespace OpenSCAD { | ||
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| // See http://lolengine.net/blog/2013/01/13/fast-rgb-to-hsv | ||
| void rgbtohsv(float r, float g, float b, float& h, float& s, float& v) | ||
| { | ||
| float K = 0.f; | ||
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| if (g < b) { | ||
| std::swap(g, b); | ||
| K = -1.f; | ||
| } | ||
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| if (r < g) { | ||
| std::swap(r, g); | ||
| K = -2.f / 6.f - K; | ||
| } | ||
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| float chroma = r - std::min(g, b); | ||
| h = std::fabs(K + (g - b) / (6.f * chroma + 1e-20f)); | ||
| s = chroma / (r + 1e-20f); | ||
| v = r; | ||
| } | ||
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| Color4f getColorHSV(const Color4f& col) | ||
| { | ||
| float h, s, v; | ||
| OpenSCAD::rgbtohsv(col[0], col[1], col[2], h, s, v); | ||
| return {h, s, v, col[3]}; | ||
| } | ||
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| /** | ||
| * Calculate contrast color. Based on the article | ||
| * http://gamedev.stackexchange.com/questions/38536/given-a-rgb-color-x-how-to-find-the-most-contrasting-color-y | ||
| * | ||
| * @param col the input color | ||
| * @return a color with high contrast to the input color | ||
| */ | ||
| Color4f getContrastColor(const Color4f& col) | ||
| { | ||
| Color4f hsv = getColorHSV(col); | ||
| float Y = 0.2126f * col[0] + 0.7152f * col[1] + 0.0722f * col[2]; | ||
| float S = hsv[1]; | ||
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| if (S < 0.5) { | ||
| // low saturation, choose between black / white based on luminance Y | ||
| float val = Y > 0.5 ? 0.0f : 1.0f; | ||
| return {val, val, val, 1.0f}; | ||
| } else { | ||
| float H = 360 * hsv[0]; | ||
| if ((H < 60) || (H > 300)) { | ||
| return {0.0f, 1.0f, 1.0f, 1.0f}; // red -> cyan | ||
| } else if (H < 180) { | ||
| return {1.0f, 0.0f, 1.0f, 1.0f}; // green -> magenta | ||
| } else { | ||
| return {1.0f, 1.0f, 0.0f, 1.0f}; // blue -> yellow | ||
| } | ||
| } | ||
| } | ||
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| // Parses hex colors according to: https://drafts.csswg.org/css-color/#typedef-hex-color. | ||
| // If the input is invalid, returns boost::none. | ||
| // Supports the following formats: | ||
| // * "#rrggbb" | ||
| // * "#rrggbbaa" | ||
| // * "#rgb" | ||
| // * "#rgba" | ||
| std::optional<Color4f> parse_hex_color(const std::string& hex) { | ||
| // validate size. short syntax uses one hex digit per color channel instead of 2. | ||
| const bool short_syntax = hex.size() == 4 || hex.size() == 5; | ||
| const bool long_syntax = hex.size() == 7 || hex.size() == 9; | ||
| if (!short_syntax && !long_syntax) return {}; | ||
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| // validate | ||
| if (hex[0] != '#') return {}; | ||
| if (!std::all_of(std::begin(hex) + 1, std::end(hex), | ||
| [](char c) { | ||
| return std::isxdigit(static_cast<unsigned char>(c)); | ||
| })) { | ||
| return {}; | ||
| } | ||
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| // number of characters per color channel | ||
| const int stride = short_syntax ? 1 : 2; | ||
| const float channel_max = short_syntax ? 15.0f : 255.0f; | ||
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| Color4f rgba; | ||
| rgba[3] = 1.0; // default alpha to 100% | ||
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| for (unsigned i = 0; i < (hex.size() - 1) / stride; ++i) { | ||
| const std::string chunk = hex.substr(1 + i * stride, stride); | ||
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| // convert the hex character(s) from base 16 to base 10 | ||
| rgba[i] = stoi(chunk, nullptr, 16) / channel_max; | ||
| } | ||
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| return rgba; | ||
| } | ||
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| } // namespace |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,31 @@ | ||
| #pragma once | ||
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| #include <string> | ||
| #include <optional> | ||
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| #include "linalg.h" | ||
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| template<> struct std::hash<Color4f> { | ||
| std::size_t operator()(Color4f const& c) const noexcept { | ||
| std::size_t hash = 0; | ||
| for (int idx = 0;idx < 4;idx++) { | ||
| std::size_t h = std::hash<float>{}(c[idx]); | ||
| hash = h ^ (hash << 1); | ||
| } | ||
| return hash; | ||
| } | ||
| }; | ||
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| namespace OpenSCAD { | ||
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| inline Color4f CORNFIELD_FACE_COLOR{ 0xf9, 0xd7, 0x2c, 255 }; | ||
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| void rgbtohsv(float r, float g, float b, float& h, float& s, float& v); | ||
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| std::optional<Color4f> parse_hex_color(const std::string& hex); | ||
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| Color4f getContrastColor(const Color4f& col); | ||
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| Color4f getColorHSV(const Color4f& col); | ||
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| } // namespace |
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