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#3540 - Fixed toolpaths preview for empty ranges

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This commit is contained in:
Enrico Turri 2020-01-20 10:38:01 +01:00
parent 8840cb0905
commit cbe5132832
1 changed files with 16 additions and 11 deletions
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27
src/libslic3r/GCode/PreviewData.cpp
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@ -70,19 +70,15 @@ float GCodePreviewData::RangeBase::step_size() const
Color GCodePreviewData::RangeBase::get_color_at(float value) const
{
if (empty())
return Color{};
// Input value scaled to the color range
const float global_t = std::max(0.0f, value - min()) / step_size(); // lower limit of 0.0f
float step = step_size();
const float global_t = (step != 0.0f) ? std::max(0.0f, value - min()) / step_size() : 0.0f; // lower limit of 0.0f
constexpr std::size_t color_max_idx = range_rainbow_colors.size() - 1;
// Compute the two colors just below (low) and above (high) the input value
const std::size_t color_low_idx = std::clamp(static_cast<std::size_t>(global_t), std::size_t{ 0 }, color_max_idx);
const std::size_t color_high_idx = std::clamp(color_low_idx + 1, std::size_t{ 0 }, color_max_idx);
const Color color_low = range_rainbow_colors[color_low_idx];
const Color color_high = range_rainbow_colors[color_high_idx];
// Compute how far the value is between the low and high colors so that they can be interpolated
const float local_t = std::min(global_t - static_cast<float>(color_low_idx), 1.0f); // upper limit of 1.0f
@ -91,7 +87,7 @@ Color GCodePreviewData::RangeBase::get_color_at(float value) const
Color ret;
for (unsigned int i = 0; i < 4; ++i)
{
ret.rgba[i] = lerp(color_low.rgba[i], color_high.rgba[i], local_t);
ret.rgba[i] = lerp(range_rainbow_colors[color_low_idx].rgba[i], range_rainbow_colors[color_high_idx].rgba[i], local_t);
}
return ret;
}
@ -378,11 +374,20 @@ GCodePreviewData::LegendItemsList GCodePreviewData::get_legend_items(const std::
list.reserve(range_rainbow_colors.size());
float step = range.step_size();
for (int i = static_cast<int>(range_rainbow_colors.size()) - 1; i >= 0; --i)
if (step == 0.0f)
{
char buf[1024];
sprintf(buf, "%.*f", decimals, scale_factor * (range.min() + (float)i * step));
list.emplace_back(buf, range_rainbow_colors[i]);
sprintf(buf, "%.*f", decimals, scale_factor * range.min());
list.emplace_back(buf, range_rainbow_colors[0]);
}
else
{
for (int i = static_cast<int>(range_rainbow_colors.size()) - 1; i >= 0; --i)
{
char buf[1024];
sprintf(buf, "%.*f", decimals, scale_factor * (range.min() + (float)i * step));
list.emplace_back(buf, range_rainbow_colors[i]);
}
}
}
};