clean up comments

src/slic3r/GUI/FilamentBitmapUtils.hpp

@@ -38,19 +38,17 @@ wxColour blend_n_colors(const std::vector<wxColour>& cols, const std::vector<dou
 
 // Sample a gradient mixed filament the way the slicer builds it: t runs 0..1 over the
 // model's height, the curve gives the first component's ratio at t, and the two
-// components are blended at that ratio. Entry 0 is the bottom of the model, the last
-// entry its top. Blending goes through blend_n_colors, so measured mixes and the
-// reserved [kGradientMinRatio, kGradientMaxRatio] band are both respected — a plain
-// two-endpoint fade is neither.
+// components are blended at that ratio through blend_n_colors. Entry 0 is the bottom
+// of the model, the last entry its top.
 std::vector<wxColour> sample_gradient_ramp(const wxColour& first,
                                            const wxColour& second,
                                            const Slic3r::GradientCurve& curve,
                                            int steps);
 
 // Same ramp for a project config slot, resolving components, colours and curve (or the
-// linear gradient_range fallback) from cfg. Empty unless the slot is a two-component
-// gradient mixed filament, which is what gates every caller to mixed slots only.
-// steps is the ramp's resolution; pass the destination's height in pixels.
+// linear gradient_range fallback) from cfg. Returns empty for any slot that is not a
+// two-component gradient mixed filament. steps is the ramp's resolution; pass the
+// destination's height in pixels.
 std::vector<wxColour> mixed_gradient_ramp(const Slic3r::DynamicPrintConfig& cfg, size_t slot, int steps);
 
 // Fill rect with a ramp, ramp.front() along the bottom edge.