c02f3c94d9
Opacity modifier implementation based on GP2. Functionality is largely unchanged. _Color Mode_ is either `Stroke` or `Fill` for modifying color opacity or `Hardness`. _Uniform Opacity_ does two things at once (!): - Sets the same opacity value for every point in a stroke. - Sets opacity as an absolute value rather than a factor. _Weight as Factor_ (button to the right of Opacity Factor): Use the vertex group as opacity __factor__ rather than an overall __influence__. This is confusing and hard to convey, but copies behavior from GP2. The _Influence_ panel contains the same filter settings as the GP2 modifier, with some small changes: - _Layer_ selects only strokes in the respective layer (with an _Invert_ option) - _Material_ selects only points with the respective material (with an _Invert_ option) - _Layer Pass_ and _Material Pass_ select only strokes/points which are rendered in the respective pass. _Note 1: Layers don't have UI for setting a pass yet, this will be a generic layer attribute. This can be set through the API for testing._ _Note 2: In GP2 a pass value of zero was used to disable pass filters. Since zero is a valid pass ID an explicit flag has been added for the purpose of turning pass filters on and off._ - _Vertex Group_: This can be used as an additional influence filter on points. If _Weight as Factor_ is enable the vertex group instead replaces the opacity factor. In _Fill_ mode the vertex group weight of the stroke's first point is used as influence for the entire stroke. - _Custom Curve_ is another possible influence factor per point. The curve input value is the relative position of a point along its stroke. The Influence settings have been moved into a separate DNA struct, which should help with reusability in various modifiers. Various utility functions can be found int `MOD_grease_pencil_util.hh` for handling influence settings and generating `IndexMasks` for modernized C++ code. Pull Request: https://projects.blender.org/blender/blender/pulls/116946
67 lines
2.6 KiB
C++
67 lines
2.6 KiB
C++
/* SPDX-FileCopyrightText: 2024 Blender Authors
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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/** \file
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* \ingroup modifiers
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*/
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#pragma once
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#include "BLI_index_mask.hh"
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#include "BLI_vector.hh"
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#include "BKE_modifier.hh"
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struct ARegionType;
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struct bContext;
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struct GreasePencil;
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struct GreasePencilModifierInfluenceData;
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struct GreasePencilModifierLayerFilter;
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struct GreasePencilModifierMaterialFilter;
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struct PanelType;
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struct PointerRNA;
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struct uiLayout;
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namespace blender::bke {
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class CurvesGeometry;
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namespace greasepencil {
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class Drawing;
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}
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} // namespace blender::bke
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namespace blender::modifier::greasepencil {
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void init_influence_data(GreasePencilModifierInfluenceData *influence_data, bool has_custom_curve);
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void copy_influence_data(const GreasePencilModifierInfluenceData *influence_data_src,
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GreasePencilModifierInfluenceData *influence_data_dst,
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int flag);
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void free_influence_data(GreasePencilModifierInfluenceData *influence_data);
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void foreach_influence_ID_link(GreasePencilModifierInfluenceData *influence_data,
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Object *ob,
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IDWalkFunc walk,
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void *user_data);
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void write_influence_data(BlendWriter *writer,
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const GreasePencilModifierInfluenceData *influence_data);
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void read_influence_data(BlendDataReader *reader,
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GreasePencilModifierInfluenceData *influence_data);
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void draw_layer_filter_settings(const bContext *C, uiLayout *layout, PointerRNA *ptr);
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void draw_material_filter_settings(const bContext *C, uiLayout *layout, PointerRNA *ptr);
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void draw_vertex_group_settings(const bContext *C, uiLayout *layout, PointerRNA *ptr);
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void draw_custom_curve_settings(const bContext *C, uiLayout *layout, PointerRNA *ptr);
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IndexMask get_filtered_layer_mask(const GreasePencil &grease_pencil,
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const GreasePencilModifierInfluenceData &influence_data,
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IndexMaskMemory &memory);
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IndexMask get_filtered_stroke_mask(const Object *ob,
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const bke::CurvesGeometry &curves,
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const GreasePencilModifierInfluenceData &influence_data,
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IndexMaskMemory &memory);
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Vector<bke::greasepencil::Drawing *> get_drawings_for_write(GreasePencil &grease_pencil,
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const IndexMask &layer_mask,
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int frame);
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} // namespace blender::modifier::greasepencil
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