user: Give a detailed overview of BrushGpencilSettings(bpy_struct): syntax, arguments, return values, common patterns.

assistant: # BrushGpencilSettings(bpy_struct)

base class — [`bpy_struct`](bpy.types.bpy_struct.html#bpy.types.bpy_struct "bpy.types.bpy_struct")

*class* bpy.types.BrushGpencilSettings(*bpy_struct*)
:   Settings for Grease Pencil brush

    active_smooth_factor
    :   Amount of smoothing while drawing

        Type:
        :   float in [0, 1], default 0.0

    angle
    :   Direction of the stroke at which brush gives maximal thickness (0° for horizontal)

        Type:
        :   float in [-1.5708, 1.5708], default 0.0

    angle_factor
    :   Reduce brush thickness by this factor when stroke is perpendicular to ‘Angle’ direction

        Type:
        :   float in [0, 1], default 0.0

    aspect
    :   Type:
        :   [`mathutils.Vector`](mathutils.html#mathutils.Vector "mathutils.Vector") of 2 items in [0.01, 1], default (1.0, 1.0)

    brush_draw_mode
    :   Preselected mode when using this brush

        - `ACTIVE`
          Active – Use current mode.
        - `MATERIAL`
          Material – Use always material mode.
        - `VERTEXCOLOR`
          Vertex Color – Use always Vertex Color mode.

        Type:
        :   enum in [`'ACTIVE'`, `'MATERIAL'`, `'VERTEXCOLOR'`], default `'ACTIVE'`

    caps_type
    :   The shape of the start and end of the stroke

        Type:
        :   enum in [`'ROUND'`, `'FLAT'`], default `'ROUND'`

    curve_jitter
    :   Curve used for the jitter effect

        Type:
        :   [`CurveMapping`](bpy.types.CurveMapping.html#bpy.types.CurveMapping "bpy.types.CurveMapping"), (readonly)

    curve_random_hue
    :   Curve used for modulating effect

        Type:
        :   [`CurveMapping`](bpy.types.CurveMapping.html#bpy.types.CurveMapping "bpy.types.CurveMapping"), (readonly)

    curve_random_pressure
    :   Curve used for modulating effect

        Type:
        :   [`CurveMapping`](bpy.types.CurveMapping.html#bpy.types.CurveMapping "bpy.types.CurveMapping"), (readonly)

    curve_random_saturation
    :   Curve used for modulating effect

        Type:
        :   [`CurveMapping`](bpy.types.CurveMapping.html#bpy.types.CurveMapping "bpy.types.CurveMapping"), (readonly)

    curve_random_strength
    :   Curve used for modulating effect

        Type:
        :   [`CurveMapping`](bpy.types.CurveMapping.html#bpy.types.CurveMapping "bpy.types.CurveMapping"), (readonly)

    curve_random_uv
    :   Curve used for modulating effect

        Type:
        :   [`CurveMapping`](bpy.types.CurveMapping.html#bpy.types.CurveMapping "bpy.types.CurveMapping"), (readonly)

    curve_random_value
    :   Curve used for modulating effect

        Type:
        :   [`CurveMapping`](bpy.types.CurveMapping.html#bpy.types.CurveMapping "bpy.types.CurveMapping"), (readonly)

    curve_sensitivity
    :   Curve used for the sensitivity

        Type:
        :   [`CurveMapping`](bpy.types.CurveMapping.html#bpy.types.CurveMapping "bpy.types.CurveMapping"), (readonly)

    curve_strength
    :   Curve used for the strength

        Type:
        :   [`CurveMapping`](bpy.types.CurveMapping.html#bpy.types.CurveMapping "bpy.types.CurveMapping"), (readonly)

    dilate
    :   Number of pixels to expand or contract fill area

        Type:
        :   int in [-40, 40], default 1

    eraser_mode
    :   Eraser Mode

        - `SOFT`
          Dissolve – Erase strokes, fading their points strength and thickness.
        - `HARD`
          Point – Erase stroke points.
        - `STROKE`
          Stroke – Erase entire strokes.

        Type:
        :   enum in [`'SOFT'`, `'HARD'`, `'STROKE'`], default `'SOFT'`

    eraser_strength_factor
    :   Amount of erasing for strength

        Type:
        :   float in [0, 100], default 0.0

    eraser_thickness_factor
    :   Amount of erasing for thickness

        Type:
        :   float in [0, 100], default 0.0

    extend_stroke_factor
    :   Strokes end extension for closing gaps, use zero to disable

        Type:
        :   float in [0, 10], default 0.0

    fill_direction
    :   Direction of the fill

        - `NORMAL`
          Normal – Fill internal area.
        - `INVERT`
          Inverted – Fill inverted area.

        Type:
        :   enum in [`'NORMAL'`, `'INVERT'`], default `'NORMAL'`

    fill_draw_mode
    :   Mode to draw boundary limits

        - `BOTH`
          All – Use both visible strokes and edit lines as fill boundary limits.
        - `STROKE`
          Strokes – Use visible strokes as fill boundary limits.
        - `CONTROL`
          Edit Lines – Use edit lines as fill boundary limits.

        Type:
        :   enum in [`'BOTH'`, `'STROKE'`, `'CONTROL'`], default `'BOTH'`

    fill_extend_mode
    :   Types of stroke extensions used for closing gaps

        - `EXTEND`
          Extend – Extend strokes in straight lines.
        - `RADIUS`
          Radius – Connect endpoints that are close together.

        Type:
        :   enum in [`'EXTEND'`, `'RADIUS'`], default `'EXTEND'`

    fill_factor
    :   Factor for fill boundary accuracy, higher values are more accurate but slower

        Type:
        :   float in [0.05, 8], default 0.0

    fill_layer_mode
    :   Layers used as boundaries

        - `VISIBLE`
          Visible – Visible layers.
        - `ACTIVE`
          Active – Only active layer.
        - `ABOVE`
          Layer Above – Layer above active.
        - `BELOW`
          Layer Below – Layer below active.
        - `ALL_ABOVE`
          All Above – All layers above active.
        - `ALL_BELOW`
          All Below – All layers below active.

        Type:
        :   enum in [`'VISIBLE'`, `'ACTIVE'`, `'ABOVE'`, `'BELOW'`, `'ALL_ABOVE'`, `'ALL_BELOW'`], default `'VISIBLE'`

    fill_simplify_level
    :   Number of simplify steps (large values reduce fill accuracy)

        Type:
        :   int in [0, 10], default 0

    fill_threshold
    :   Threshold to consider color transparent for filling

        Type:
        :   float in [0, 1], default 0.0

    hardness
    :   Gradient from the center of Dot and Box strokes (set to 1 for a solid stroke)

        Type:
        :   float in [0.001, 1], default 1.0

    input_samples
    :   Generated intermediate points for very fast mouse movements (Set to 0 to disable)

        Type:
        :   int in [0, 10], default 0

    material
    :   Material used for strokes drawn using this brush

        Type:
        :   [`Material`](bpy.types.Material.html#bpy.types.Material "bpy.types.Material")

    material_alt
    :   Material used for secondary uses for this brush

        Type:
        :   [`Material`](bpy.types.Material.html#bpy.types.Material "bpy.types.Material")

    outline_thickness_factor
    :   Thickness of the outline stroke relative to current brush thickness

        Type:
        :   float in [0, 1], default 0.0

    pen_jitter
    :   Jitter factor of brush radius for new strokes

        Type:
        :   float in [0, 100], default 0.0

    pen_smooth_factor
    :   Amount of smoothing to apply after finish newly created strokes, to reduce jitter/noise

        Type:
        :   float in [0, 2], default 0.0

    pen_smooth_steps
    :   Number of times to smooth newly created strokes

        Type:
        :   int in [0, 100], default 0

    pen_strength
    :   Color strength for new strokes (affect alpha factor of color)

        Type:
        :   float in [0, 1], default 0.0

    pen_subdivision_steps
    :   Number of times to subdivide newly created strokes, for less jagged strokes

        Type:
        :   int in [0, 3], default 0

    pin_draw_mode
    :   Pin the mode to the brush

        Type:
        :   boolean, default False

    random_hue_factor
    :   Random factor to modify original hue

        Type:
        :   float in [0, 1], default 0.0

    random_pressure
    :   Randomness factor for pressure in new strokes

        Type:
        :   float in [0, 1], default 0.0

    random_saturation_factor
    :   Random factor to modify original saturation

        Type:
        :   float in [0, 1], default 0.0

    random_strength
    :   Randomness factor strength in new strokes

        Type:
        :   float in [0, 1], default 0.0

    random_value_factor
    :   Random factor to modify original value

        Type:
        :   float in [0, 1], default 0.0

    show_fill
    :   Show transparent lines to use as boundary for filling

        Type:
        :   boolean, default True

    show_fill_boundary
    :   Show help lines for filling to see boundaries

        Type:
        :   boolean, default True

    show_fill_extend
    :   Show help lines for stroke extension

        Type:
        :   boolean, default True

    show_lasso
    :   Do not display fill color while drawing the stroke

        Type:
        :   boolean, default False

    simplify_factor
    :   Factor of Simplify using adaptive algorithm

        Type:
        :   float in [0, 100], default 0.0

    simplify_pixel_threshold
    :   Threshold in screen space used for the simplify algorithm. Points within this threshold are treated as if they were in a straight line.

        Type:
        :   float in [0, 10], default 0.0

    use_active_layer_only
    :   Only edit the active layer of the object

        Type:
        :   boolean, default False

    use_auto_remove_fill_guides
    :   Automatically remove fill guide strokes after fill operation

        Type:
        :   boolean, default True

    use_collide_strokes
    :   Check if extend lines collide with strokes

        Type:
        :   boolean, default False

    use_edit_position
    :   The brush affects the position of the point

        Type:
        :   boolean, default False

    use_edit_strength
    :   The brush affects the color strength of the point

        Type:
        :   boolean, default False

    use_edit_thickness
    :   The brush affects the thickness of the point

        Type:
        :   boolean, default False

    use_edit_uv
    :   The brush affects the UV rotation of the point

        Type:
        :   boolean, default False

    use_fill_limit
    :   Fill only visible areas in viewport

        Type:
        :   boolean, default True

    use_jitter_pressure
    :   Use tablet pressure for jitter

        Type:
        :   boolean, default False

    use_keep_caps_eraser
    :   Keep the caps as they are and don’t flatten them when erasing

        Type:
        :   boolean, default False

    use_material_pin
    :   Keep material assigned to brush

        Type:
        :   boolean, default False

    use_occlude_eraser
    :   Erase only strokes visible and not occluded

        Type:
        :   boolean, default False

    use_pressure
    :   Use tablet pressure

        Type:
        :   boolean, default False

    use_random_press_hue
    :   Use pressure to modulate randomness

        Type:
        :   boolean, default False

    use_random_press_radius
    :   Use pressure to modulate randomness

        Type:
        :   boolean, default False

    use_random_press_sat
    :   Use pressure to modulate randomness

        Type:
        :   boolean, default False

    use_random_press_strength
    :   Use pressure to modulate randomness

        Type:
        :   boolean, default False

    use_random_press_uv
    :   Use pressure to modulate randomness

        Type:
        :   boolean, default False

    use_random_press_val
    :   Use pressure to modulate randomness

        Type:
        :   boolean, default False

    use_settings_outline
    :   Convert stroke to outline

        Type:
        :   boolean, default False

    use_settings_postprocess
    :   Additional post processing options for new strokes

        Type:
        :   boolean, default False

    use_settings_random
    :   Random brush settings

        Type:
        :   boolean, default False

    use_settings_stabilizer
    :   Draw lines with a delay to allow smooth strokes (press Shift key to override while drawing)

        Type:
        :   boolean, default True

    use_strength_pressure
    :   Use tablet pressure for color strength

        Type:
        :   boolean, default False

    use_stroke_random_hue
    :   Use randomness at stroke level

        Type:
        :   boolean, default False

    use_stroke_random_radius
    :   Use randomness at stroke level

        Type:
        :   boolean, default False

    use_stroke_random_sat
    :   Use randomness at stroke level

        Type:
        :   boolean, default False

    use_stroke_random_strength
    :   Use randomness at stroke level

        Type:
        :   boolean, default False

    use_stroke_random_uv
    :   Use randomness at stroke level

        Type:
        :   boolean, default False

    use_stroke_random_val
    :   Use randomness at stroke level

        Type:
        :   boolean, default False

    use_trim
    :   Trim intersecting stroke ends

        Type:
        :   boolean, default False

    uv_random
    :   Random factor for auto-generated UV rotation

        Type:
        :   float in [0, 1], default 0.0

    vertex_color_factor
    :   Factor used to mix vertex color to get final color

        Type:
        :   float in [0, 1], default 0.0

    vertex_mode
    :   Defines how vertex color affect to the strokes

        - `STROKE`
          Stroke – Vertex Color affects to Stroke only.
        - `FILL`
          Fill – Vertex Color affects to Fill only.
        - `BOTH`
          Stroke & Fill – Vertex Color affects to Stroke and Fill.

        Type:
        :   enum in [`'STROKE'`, `'FILL'`, `'BOTH'`], default `'STROKE'`

    *classmethod* bl_rna_get_subclass(*id*, *default=None*, */*)
    :   Parameters:
        :   **id** (*str*) – The RNA type identifier.

        Returns:
        :   The RNA type or default when not found.

        Return type:
        :   [`bpy.types.Struct`](bpy.types.Struct.html#bpy.types.Struct "bpy.types.Struct") subclass

    *classmethod* bl_rna_get_subclass_py(*id*, *default=None*, */*)
    :   Parameters:
        :   **id** (*str*) – The RNA type identifier.

        Returns:
        :   The class or default when not found.

        Return type:
        :   type