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# SPDX-FileCopyrightText: 2023 Blender Foundation
#
# SPDX-License-Identifier: GPL-2.0-or-later
import bpy
import gpu
from gpu_extras.batch import batch_for_shader
from math import cos, sin, pi
from .nodes import get_nodes_links, prefs_line_width, abs_node_location, dpi_fac
def draw_line(x1, y1, x2, y2, size, colour=(1.0, 1.0, 1.0, 0.7)):
shader = gpu.shader.from_builtin('POLYLINE_SMOOTH_COLOR')
shader.uniform_float("viewportSize", gpu.state.viewport_get()[2:])
shader.uniform_float("lineWidth", size * prefs_line_width())
vertices = ((x1, y1), (x2, y2))
vertex_colors = ((colour[0] + (1.0 - colour[0]) / 4,
colour[1] + (1.0 - colour[1]) / 4,
colour[2] + (1.0 - colour[2]) / 4,
colour[3] + (1.0 - colour[3]) / 4),
colour)
batch = batch_for_shader(shader, 'LINE_STRIP', {"pos": vertices, "color": vertex_colors})
batch.draw(shader)
def draw_circle_2d_filled(mx, my, radius, colour=(1.0, 1.0, 1.0, 0.7)):
radius = radius * prefs_line_width()
sides = 12
vertices = [(radius * cos(i * 2 * pi / sides) + mx,
radius * sin(i * 2 * pi / sides) + my)
for i in range(sides + 1)]
shader = gpu.shader.from_builtin('UNIFORM_COLOR')
shader.uniform_float("color", colour)
batch = batch_for_shader(shader, 'TRI_FAN', {"pos": vertices})
batch.draw(shader)
def draw_rounded_node_border(node, radius=8, colour=(1.0, 1.0, 1.0, 0.7)):
area_width = bpy.context.area.width
sides = 16
radius *= prefs_line_width()
nlocx, nlocy = abs_node_location(node)
nlocx = (nlocx + 1) * dpi_fac()
nlocy = (nlocy + 1) * dpi_fac()
ndimx = node.dimensions.x
ndimy = node.dimensions.y
if node.hide:
nlocx += -1
nlocy += 5
if node.type == 'REROUTE':
# nlocx += 1
nlocy -= 1
ndimx = 0
ndimy = 0
radius += 6
shader = gpu.shader.from_builtin('UNIFORM_COLOR')
shader.uniform_float("color", colour)
# Top left corner
mx, my = bpy.context.region.view2d.view_to_region(nlocx, nlocy, clip=False)
vertices = [(mx, my)]
for i in range(sides + 1):
if (4 <= i <= 8):
if mx < area_width:
cosine = radius * cos(i * 2 * pi / sides) + mx
sine = radius * sin(i * 2 * pi / sides) + my
vertices.append((cosine, sine))
batch = batch_for_shader(shader, 'TRI_FAN', {"pos": vertices})
batch.draw(shader)
# Top right corner
mx, my = bpy.context.region.view2d.view_to_region(nlocx + ndimx, nlocy, clip=False)
vertices = [(mx, my)]
for i in range(sides + 1):
if (0 <= i <= 4):
if mx < area_width:
cosine = radius * cos(i * 2 * pi / sides) + mx
sine = radius * sin(i * 2 * pi / sides) + my
vertices.append((cosine, sine))
batch = batch_for_shader(shader, 'TRI_FAN', {"pos": vertices})
batch.draw(shader)
# Bottom left corner
mx, my = bpy.context.region.view2d.view_to_region(nlocx, nlocy - ndimy, clip=False)
vertices = [(mx, my)]
for i in range(sides + 1):
if (8 <= i <= 12):
if mx < area_width:
cosine = radius * cos(i * 2 * pi / sides) + mx
sine = radius * sin(i * 2 * pi / sides) + my
vertices.append((cosine, sine))
batch = batch_for_shader(shader, 'TRI_FAN', {"pos": vertices})
batch.draw(shader)
# Bottom right corner
mx, my = bpy.context.region.view2d.view_to_region(nlocx + ndimx, nlocy - ndimy, clip=False)
vertices = [(mx, my)]
for i in range(sides + 1):
if (12 <= i <= 16):
if mx < area_width:
cosine = radius * cos(i * 2 * pi / sides) + mx
sine = radius * sin(i * 2 * pi / sides) + my
vertices.append((cosine, sine))
batch = batch_for_shader(shader, 'TRI_FAN', {"pos": vertices})
batch.draw(shader)
# prepare drawing all edges in one batch
vertices = []
indices = []
id_last = 0
# Left edge
m1x, m1y = bpy.context.region.view2d.view_to_region(nlocx, nlocy, clip=False)
m2x, m2y = bpy.context.region.view2d.view_to_region(nlocx, nlocy - ndimy, clip=False)
if m1x < area_width and m2x < area_width:
vertices.extend([(m2x - radius, m2y), (m2x, m2y),
(m1x, m1y), (m1x - radius, m1y)])
indices.extend([(id_last, id_last + 1, id_last + 3),
(id_last + 3, id_last + 1, id_last + 2)])
id_last += 4
# Top edge
m1x, m1y = bpy.context.region.view2d.view_to_region(nlocx, nlocy, clip=False)
m2x, m2y = bpy.context.region.view2d.view_to_region(nlocx + ndimx, nlocy, clip=False)
m1x = min(m1x, area_width)
m2x = min(m2x, area_width)
vertices.extend([(m1x, m1y), (m2x, m1y),
(m2x, m1y + radius), (m1x, m1y + radius)])
indices.extend([(id_last, id_last + 1, id_last + 3),
(id_last + 3, id_last + 1, id_last + 2)])
id_last += 4
# Right edge
m1x, m1y = bpy.context.region.view2d.view_to_region(nlocx + ndimx, nlocy, clip=False)
m2x, m2y = bpy.context.region.view2d.view_to_region(nlocx + ndimx, nlocy - ndimy, clip=False)
if m1x < area_width and m2x < area_width:
vertices.extend([(m1x, m2y), (m1x + radius, m2y),
(m1x + radius, m1y), (m1x, m1y)])
indices.extend([(id_last, id_last + 1, id_last + 3),
(id_last + 3, id_last + 1, id_last + 2)])
id_last += 4
# Bottom edge
m1x, m1y = bpy.context.region.view2d.view_to_region(nlocx, nlocy - ndimy, clip=False)
m2x, m2y = bpy.context.region.view2d.view_to_region(nlocx + ndimx, nlocy - ndimy, clip=False)
m1x = min(m1x, area_width)
m2x = min(m2x, area_width)
vertices.extend([(m1x, m2y), (m2x, m2y),
(m2x, m1y - radius), (m1x, m1y - radius)])
indices.extend([(id_last, id_last + 1, id_last + 3),
(id_last + 3, id_last + 1, id_last + 2)])
# now draw all edges in one batch
if len(vertices) != 0:
batch = batch_for_shader(shader, 'TRIS', {"pos": vertices}, indices=indices)
batch.draw(shader)
def draw_callback_nodeoutline(self, context, mode):
if self.mouse_path:
gpu.state.blend_set('ALPHA')
nodes, _links = get_nodes_links(context)
if mode == "LINK":
col_outer = (1.0, 0.2, 0.2, 0.4)
col_inner = (0.0, 0.0, 0.0, 0.5)
col_circle_inner = (0.3, 0.05, 0.05, 1.0)
elif mode == "LINKMENU":
col_outer = (0.4, 0.6, 1.0, 0.4)
col_inner = (0.0, 0.0, 0.0, 0.5)
col_circle_inner = (0.08, 0.15, .3, 1.0)
elif mode == "MIX":
col_outer = (0.2, 1.0, 0.2, 0.4)
col_inner = (0.0, 0.0, 0.0, 0.5)
col_circle_inner = (0.05, 0.3, 0.05, 1.0)
m1x = self.mouse_path[0][0]
m1y = self.mouse_path[0][1]
m2x = self.mouse_path[-1][0]
m2y = self.mouse_path[-1][1]
n1 = nodes[context.scene.NWLazySource]
n2 = nodes[context.scene.NWLazyTarget]
if n1 == n2:
col_outer = (0.4, 0.4, 0.4, 0.4)
col_inner = (0.0, 0.0, 0.0, 0.5)
col_circle_inner = (0.2, 0.2, 0.2, 1.0)
draw_rounded_node_border(n1, radius=6, colour=col_outer) # outline
draw_rounded_node_border(n1, radius=5, colour=col_inner) # inner
draw_rounded_node_border(n2, radius=6, colour=col_outer) # outline
draw_rounded_node_border(n2, radius=5, colour=col_inner) # inner
draw_line(m1x, m1y, m2x, m2y, 5, col_outer) # line outline
draw_line(m1x, m1y, m2x, m2y, 2, col_inner) # line inner
# circle outline
draw_circle_2d_filled(m1x, m1y, 7, col_outer)
draw_circle_2d_filled(m2x, m2y, 7, col_outer)
# circle inner
draw_circle_2d_filled(m1x, m1y, 5, col_circle_inner)
draw_circle_2d_filled(m2x, m2y, 5, col_circle_inner)
gpu.state.blend_set('NONE')
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