e955c94ed3
Listing the "Blender Foundation" as copyright holder implied the Blender Foundation holds copyright to files which may include work from many developers. While keeping copyright on headers makes sense for isolated libraries, Blender's own code may be refactored or moved between files in a way that makes the per file copyright holders less meaningful. Copyright references to the "Blender Foundation" have been replaced with "Blender Authors", with the exception of `./extern/` since these this contains libraries which are more isolated, any changed to license headers there can be handled on a case-by-case basis. Some directories in `./intern/` have also been excluded: - `./intern/cycles/` it's own `AUTHORS` file is planned. - `./intern/opensubdiv/`. An "AUTHORS" file has been added, using the chromium projects authors file as a template. Design task: #110784 Ref !110783.
94 lines
3.1 KiB
Python
94 lines
3.1 KiB
Python
# SPDX-FileCopyrightText: 2018-2023 Blender Authors
|
|
#
|
|
# SPDX-License-Identifier: GPL-2.0-or-later
|
|
|
|
def draw_circle_2d(position, color, radius, *, segments=None):
|
|
"""
|
|
Draw a circle.
|
|
|
|
:arg position: Position where the circle will be drawn.
|
|
:type position: 2D Vector
|
|
:arg color: Color of the circle. To use transparency GL_BLEND has to be enabled.
|
|
:type color: tuple containing RGBA values
|
|
:arg radius: Radius of the circle.
|
|
:type radius: float
|
|
:arg segments: How many segments will be used to draw the circle.
|
|
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, ceil, acos
|
|
import gpu
|
|
from gpu.types import (
|
|
GPUBatch,
|
|
GPUVertBuf,
|
|
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.")
|
|
|
|
with gpu.matrix.push_pop():
|
|
gpu.matrix.translate(position)
|
|
gpu.matrix.scale_uniform(radius)
|
|
mul = (1.0 / (segments - 1)) * (pi * 2)
|
|
verts = [(sin(i * mul), cos(i * mul)) for i in range(segments)]
|
|
fmt = GPUVertFormat()
|
|
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('UNIFORM_COLOR')
|
|
batch.program_set(shader)
|
|
shader.uniform_float("color", color)
|
|
batch.draw()
|
|
|
|
|
|
def draw_texture_2d(texture, position, width, height):
|
|
"""
|
|
Draw a 2d texture.
|
|
|
|
:arg texture: GPUTexture to draw (e.g. gpu.texture.from_image(image) for :class:`bpy.types.Image`).
|
|
:type texture: :class:`gpu.types.GPUTexture`
|
|
:arg position: Position of the lower left corner.
|
|
:type position: 2D Vector
|
|
:arg width: Width of the image when drawn (not necessarily
|
|
the original width of the texture).
|
|
:type width: float
|
|
:arg height: Height of the image when drawn.
|
|
:type height: float
|
|
"""
|
|
import gpu
|
|
from . batch import batch_for_shader
|
|
|
|
coords = ((0, 0), (1, 0), (1, 1), (0, 1))
|
|
|
|
shader = gpu.shader.from_builtin('IMAGE')
|
|
batch = batch_for_shader(
|
|
shader, 'TRI_FAN',
|
|
{"pos": coords, "texCoord": coords},
|
|
)
|
|
|
|
with gpu.matrix.push_pop():
|
|
gpu.matrix.translate(position)
|
|
gpu.matrix.scale((width, height))
|
|
|
|
shader = gpu.shader.from_builtin('IMAGE')
|
|
|
|
if isinstance(texture, int):
|
|
# Call the legacy bgl to not break the existing API
|
|
import bgl
|
|
bgl.glActiveTexture(bgl.GL_TEXTURE0)
|
|
bgl.glBindTexture(bgl.GL_TEXTURE_2D, texture)
|
|
shader.uniform_int("image", 0)
|
|
else:
|
|
shader.uniform_sampler("image", texture)
|
|
|
|
batch.draw(shader)
|