[Bf-blender-cvs] [18377c4f5e4] master: UI: Improve circle drawing of cursor for uv sculpting
Chris Blackbourn
noreply at git.blender.org
Tue Aug 2 23:46:07 CEST 2022
Commit: 18377c4f5e4727f6f0b58bd0bae7a5a5686ea0a0
Author: Chris Blackbourn
Date: Wed Aug 3 09:38:51 2022 +1200
Branches: master
https://developer.blender.org/rB18377c4f5e4727f6f0b58bd0bae7a5a5686ea0a0
UI: Improve circle drawing of cursor for uv sculpting
Calculate segments based on radius.
Differential Revision: https://developer.blender.org/D15591
===================================================================
M release/scripts/modules/gpu_extras/presets.py
M release/scripts/startup/bl_ui/space_toolsystem_toolbar.py
===================================================================
diff --git a/release/scripts/modules/gpu_extras/presets.py b/release/scripts/modules/gpu_extras/presets.py
index ac9fd3cc1ff..222d9032cfd 100644
--- a/release/scripts/modules/gpu_extras/presets.py
+++ b/release/scripts/modules/gpu_extras/presets.py
@@ -1,6 +1,6 @@
# SPDX-License-Identifier: GPL-2.0-or-later
-def draw_circle_2d(position, color, radius, *, segments=32):
+def draw_circle_2d(position, color, radius, *, segments=None):
"""
Draw a circle.
@@ -11,10 +11,11 @@ def draw_circle_2d(position, color, radius, *, segments=32):
:arg radius: Radius of the circle.
:type radius: float
:arg segments: How many segments will be used to draw the circle.
- Higher values give besser results but the drawing will take longer.
- :type segments: int
+ Higher values give better results but the drawing will take longer.
+ If None or not specified, an automatic value will be calculated.
+ :type segments: int or None
"""
- from math import sin, cos, pi
+ from math import sin, cos, pi, ceil, acos
import gpu
from gpu.types import (
GPUBatch,
@@ -22,6 +23,12 @@ def draw_circle_2d(position, color, radius, *, segments=32):
GPUVertFormat,
)
+ if segments is None:
+ max_pixel_error = 0.25 # TODO: multiply 0.5 by display dpi
+ segments = int(ceil(pi / acos(1.0 - max_pixel_error / radius)))
+ segments = max(segments, 8)
+ segments = min(segments, 1000)
+
if segments <= 0:
raise ValueError("Amount of segments must be greater than 0.")
diff --git a/release/scripts/startup/bl_ui/space_toolsystem_toolbar.py b/release/scripts/startup/bl_ui/space_toolsystem_toolbar.py
index 470b78ae558..2e4c0e69e61 100644
--- a/release/scripts/startup/bl_ui/space_toolsystem_toolbar.py
+++ b/release/scripts/startup/bl_ui/space_toolsystem_toolbar.py
@@ -1889,7 +1889,7 @@ class _defs_image_uv_sculpt:
if brush is None:
return
radius = brush.size
- draw_circle_2d(xy, (1.0,) * 4, radius, segments=32)
+ draw_circle_2d(xy, (1.0,) * 4, radius)
return generate_from_enum_ex(
context,
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