[Bf-blender-cvs] [f606ee7637e] blender2.8: PyAPI: initial gpu_extras module (circle drawing utility)
Campbell Barton
noreply at git.blender.org
Thu Oct 25 12:06:04 CEST 2018
Commit: f606ee7637eb26e749bc5c9f4bc914bcfba64ee6
Author: Campbell Barton
Date: Thu Oct 25 21:04:38 2018 +1100
Branches: blender2.8
https://developer.blender.org/rBf606ee7637eb26e749bc5c9f4bc914bcfba64ee6
PyAPI: initial gpu_extras module (circle drawing utility)
===================================================================
A release/scripts/modules/gpu_extras/__init__.py
A release/scripts/modules/gpu_extras/presets.py
===================================================================
diff --git a/release/scripts/modules/gpu_extras/__init__.py b/release/scripts/modules/gpu_extras/__init__.py
new file mode 100644
index 00000000000..221c7e2da58
--- /dev/null
+++ b/release/scripts/modules/gpu_extras/__init__.py
@@ -0,0 +1,21 @@
+# ***** BEGIN GPL LICENSE BLOCK *****
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation,
+# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+#
+# ***** END GPL LICENSE BLOCK *****
+
+__all__ = (
+ "presets",
+)
diff --git a/release/scripts/modules/gpu_extras/presets.py b/release/scripts/modules/gpu_extras/presets.py
new file mode 100644
index 00000000000..444e3ea24d0
--- /dev/null
+++ b/release/scripts/modules/gpu_extras/presets.py
@@ -0,0 +1,42 @@
+# ***** BEGIN GPL LICENSE BLOCK *****
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation,
+# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+#
+# ***** END GPL LICENSE BLOCK *****
+
+def draw_circle_2d(position, color, radius, segments):
+ from math import sin, cos, pi
+ import gpu
+ from gpu.types import (
+ GPUBatch,
+ GPUVertBuf,
+ GPUVertFormat,
+ )
+
+ with gpu.matrix.push_pop():
+ gpu.matrix.translate(position)
+ gpu.matrix.scale_uniform(radius)
+ seg = 32
+ mul = (1.0 / (seg - 1)) * (pi * 2)
+ verts = [(sin(i * mul), cos(i * mul)) for i in range(seg)]
+ fmt = GPUVertFormat(format=[])
+ pos_id = fmt.attr_add(id="pos", comp_type='F32', len=2, fetch_mode='FLOAT')
+ vbo = GPUVertBuf(len=len(verts), format=fmt)
+ vbo.attr_fill(id=pos_id, data=verts)
+ batch = GPUBatch(type='LINE_STRIP', buf=vbo)
+ shader = gpu.shader.from_builtin('2D_UNIFORM_COLOR')
+ batch.program_set(shader)
+ shader.uniform_float("color", color)
+ batch.draw()
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