def __init__(self,
width=600,
height=600,
value_range_min=0,
value_range_max=1):
print(GLSL_PATH)
self.value_range = (value_range_min, value_range_max)
self._canvas = app.Canvas(size=(width, height),
position=(0, 0),
keys='interactive',
title="ALife book " +
self.__class__.__name__)
self._canvas.events.draw.connect(self._on_draw)
self._canvas.events.resize.connect(self._on_resize)
vertex_shader = open(
path.join(GLSL_PATH, 'matrix_visualizer_vertex.glsl'), 'r').read()
fragment_shader = open(
path.join(GLSL_PATH, 'matrix_visualizer_fragment.glsl'),
'r').read()
self._render_program = gloo.Program(vertex_shader, fragment_shader)
self._render_program['a_position'] = [(-1, -1), (-1, +1), (+1, -1),
(+1, +1)]
self._render_program['a_texcoord'] = [(0, 1), (0, 0), (1, 1), (1, 0)]
self._render_program['u_texture'] = np.zeros((1, 1)).astype(np.uint8)
self._canvas.show()
gloo.set_viewport(0, 0, *self._canvas.physical_size)
def drawShadows(
inputFile='/Users/rachel/Downloads/cloud_frac_padded_623_812_70_4096_4096.png',
outputFile='/Users/rachel/Downloads/newshadow.png',
lightPosition=(20, 0, 0),
dataShape=(623, 812, 70),
textureShape=(4096, 4096),
tileLayout=(6, 5),
steps=81,
alphaScale=2):
'''
Given a tiled data PNG file and a light position, computes the shadows
on the data and writes them to a second PNG.
@param inputFile: path to the input PNG
@type inputFile: string
@param outputFile: path to write out the results
@type outputFile: string
@param lightPosition: position of the point light
@type lightPosition: 3-tuple
@param dataShape: 3D shape of the data field
@type dataShape: 3-tuple
@param textureShape: shape of the input image
@type textureShape: 2-tuple
@param tileLayout: (cols, rows) arrangement of tiles in the input PNG
@type tileLayout: 2-tuple
@param steps: how many steps to take through the data in calculations
@type steps: int
@param alphaScale: factor to scale the light absorption
@type alphaScale: number
'''
width = textureShape[0]
height = textureShape[1]
c = app.Canvas(show=False, size=(width, height))
cloudTex = getCloudTexture(inputFile, width, height)
vertexPath = os.path.join(homeDir, 'shadow_vertex.glsl')
fragmentPath = os.path.join(homeDir, 'shadow_frag.glsl')
vertex = getShader(vertexPath)
fragment = getShader(fragmentPath)
program = mkProgram(vertex,
fragment,
cloudTex,
dataShape=dataShape,
textureShape=textureShape,
tileLayout=tileLayout)
setLightPosition(program, lightPosition)
setResolution(program, steps, alphaScale)
@c.connect
def on_draw(event):
gloo.clear((1, 1, 1, 1))
program.draw(gl.GL_TRIANGLE_STRIP)
im = gloo.util._screenshot((0, 0, c.size[0], c.size[1]))
imsave(outputFile, im)
c.close()
app.run()
def main():
app.Canvas(show=False)
cube_faces = unstack_cross(
stack_cross(load_envmap(os.path.join(_cubemap_dir, 'yokohama'))))
irradiance_map = prefilter_irradiance(cube_faces)
plt.imshow(
np.vstack((stack_cross(cube_faces), stack_cross(irradiance_map))))
plt.show()
def main():
app.Canvas(show=False)
cross = stack_cross(load_envmap(os.path.join(_cubemap_dir, 'yokohama')),
format=args.format)
plt.imshow(cross)
plt.show()
plt.imshow(stack_cross(unstack_cross(cross), format='horizontal'))
plt.show()
def show_colored_canvas(color):
"""Show a transient VisPy canvas with a uniform background color."""
from vispy import app, gloo
c = app.Canvas()
@c.connect
def on_draw(e):
gloo.clear(color)
show_test(c)
def __init__(self, width=600, height=600):
self._canvas = app.Canvas(size=(width, height), position=(0,0), keys='interactive', title="ALife book "+self.__class__.__name__)
self._canvas.events.draw.connect(self._on_draw)
self._canvas.events.resize.connect(self._on_resize)
vertex_shader = open(path.join(GLSL_PATH, 'scl_visualizer_vertex.glsl'), 'r').read()
fragment_shader = open(path.join(GLSL_PATH, 'scl_visualizer_fragment.glsl'), 'r').read()
self._render_program = gloo.Program(vertex_shader, fragment_shader)
gloo.set_state('translucent', clear_color='white')
self._canvas.show()
gloo.set_viewport(0, 0, *self._canvas.physical_size)
def _create_canvas():
"""Create a VisPy canvas with a color background."""
from vispy import app
c = app.Canvas()
c.color = _random_color()
@c.connect
def on_draw(e): # pragma: no cover
c.context.clear(c.color)
return c
def __init__(self, point_function, dt_coeff, width=900, height=900):
self.point_function = point_function
self.dt_coeff = dt_coeff
vertex ="""
attribute vec3 circle;
void main(void)
{
gl_Position = vec4(circle[0], circle[1], 0.0, 1.0);
gl_PointSize = 2.0*(circle[2]);
}
"""
fragment = """
void main(void)
{
float distance = length(vec2(0.5, 0.5) - gl_PointCoord);
if (distance <= 0.5)
gl_FragColor = vec4(1, 1, 1, 1);
else
discard;
}
"""
program = gloo.Program(vertex, fragment)
c = app.Canvas(keys='interactive', size=(width, height))
gloo.clear()
self.c = c
self.prev_tick_time = None
@c.connect
def on_draw(event):
if self.prev_tick_time == None:
self.prev_tick_time = time.perf_counter()
dt = (time.perf_counter() - self.prev_tick_time) * self.dt_coeff
circles = self.point_function(dt)
program['circle'] = circles
#~ gloo.clear()
program.draw('points')
c.update()
@c.connect
def on_resize(event):
gloo.set_viewport(0, 0, *event.size)
def _create_canvas():
"""Create a VisPy canvas with a color background."""
c = app.Canvas()
c.color = _random_color()
@c.connect
def on_draw(e):
c.context.clear(c.color)
@c.connect
def on_key_press(e):
c.color = _random_color()
c.update()
return c
def test_error(self):
vert = '''
void main() {
vec2 xy;
error on this line
vec2 ab;
}
'''
frag = 'void main() { glFragColor = vec4(1, 1, 1, 1); }'
with app.Canvas() as c:
program = Program(vert, frag)
try:
program._glir.flush(c.context.shared.parser)
except Exception as err:
assert_in('error on this line', str(err))
else:
raise Exception("Compile program should have failed.")
def __init__(self, nrows=1, ncols=1, samples=1000, colours=None):
self.no_rows = nrows
self.no_cols = ncols
self.m = nrows * ncols
self.n = samples
self.signals = None
self.c = app.Canvas(keys='interactive')
# Assign colours to each graph
if not colours:
self.colours = np.repeat(np.random.uniform(size=(self.m, 3),
low=.5,
high=.9),
self.n,
axis=0).astype(np.float32)
else:
self.colours = colours
# Create index of graphs
self.index = np.c_[
np.repeat(np.repeat(np.arange(self.no_cols), self.no_rows), self.n
),
np.repeat(np.tile(np.arange(self.no_rows), self.no_cols), self.n),
np.tile(np.arange(self.n), self.m)].astype(np.float32)
def disp_circuit(by_id, *map_to_col_list):
canvas = vapp.Canvas(size=(800, 800), keys='interactive', title='Floating Pwn2Win Mask')
gloo.set_viewport(0, 0, 800, 800)
gloo.set_viewport(0, 0, canvas.size[0], canvas.size[1])
gloo.set_state("translucent", depth_test=False)
panzoom = PanZoomTransform(canvas, aspect=1)
polys = PolygonCollection("agg", color="local", transform=panzoom)
shift = np.zeros((1, 2))
for colmap in map_to_col_list:
nshift = np.zeros((1, 2))
minp = np.zeros((1, 2))
for entry in by_id.values():
if entry.box.empty(): continue
if entry.nodisplay: continue
key = entry.idx
if not key in colmap: continue
points = np.concatenate((entry.box.poly() / 1e5 + shift, np.zeros((4, 1))), axis=1)
nshift = np.maximum(nshift, np.amax(points, axis=0)[:2])
minp = np.minimum(minp, np.amin(points, axis=0)[:2])
polys.append(points, color=colmap[key].rgba)
shift = (nshift - minp) * 1.1
shift[0, 1] = 0
polys.update.connect(canvas.update)
@canvas.connect
def on_draw(e):
gloo.clear('white')
polys.draw()
@canvas.connect
def on_resize(event):
width, height = event.size
gloo.set_viewport(0, 0, width, height)
canvas.show()
vapp.run()
#!/usr/bin/env python
# -*- coding: utf-8 -*-
# -----------------------------------------------------------------------------
# Copyright (c) 2014, Vispy Development Team.
# Distributed under the (new) BSD License. See LICENSE.txt for more info.
# -----------------------------------------------------------------------------
import sys
from vispy import app
from vispy.gloo import clear
# app.use_app('pyqt4') # or pyside, glut, pyglet, sdl2, etc.
canvas = app.Canvas(size=(512, 512), title = "Do nothing benchmark (vispy)",
keys='interactive')
@canvas.connect
def on_draw(event):
clear(color=True, depth=True)
canvas.update() # Draw frames as fast as possible
if __name__ == '__main__':
canvas.show()
canvas.measure_fps()
if sys.flags.interactive == 0:
app.run()
vec2 center = (floor(texcoord/size) + vec2(0.5,0.5)) * size;
texcoord -= center;
float theta = M_PI-atan(center.y-iMouse.y, center.x-iMouse.x);
float cos_theta = cos(theta);
float sin_theta = sin(theta);
texcoord = vec2(cos_theta*texcoord.x - sin_theta*texcoord.y,
sin_theta*texcoord.x + cos_theta*texcoord.y);
float d = arrow_stealth(texcoord, body, 0.25*body, linewidth, antialias);
gl_FragColor = filled(d, linewidth, antialias, vec4(0,0,0,1));
}
"""
canvas = app.Canvas(size=(2 * 512, 2 * 512), keys='interactive')
canvas.context.set_state(blend=True,
blend_func=('src_alpha', 'one_minus_src_alpha'),
blend_equation='func_add')
@canvas.connect
def on_draw(event):
gloo.clear('white')
program.draw('triangle_strip')
@canvas.connect
def on_resize(event):
program["iResolution"] = event.size
gloo.set_viewport(0, 0, event.size[0], event.size[1])
# pylint: disable=invalid-name, no-member, unused-argument
""" basic demo using shaders
http://ipython-books.github.io/featured-06/
"""
import numpy as np
from vispy import app, gloo
# In order to display a window, we need to create a Canvas.
c = app.Canvas(size=(800, 400), keys='interactive')
# When using vispy.gloo, we need to write shaders.
# These programs, written in a C-like language called GLSL,
# run on the GPU and give us full flexibility for our visualizations.
# Here, we create a trivial vertex shader that directly displays
# 2D data points (stored in the a_position variable) in the canvas
vertex = """
attribute vec2 a_position;
void main(void)
{
gl_Position = vec4(a_position, 0.0, 1.0);
}
"""
# The other shader we need to create is the fragment shader.
# It lets us control the pixels' color.
fragment = """
void main()
{
gl_FragColor = vec4(0.0, 0.0, 0.0, 1.0);
}
#!/usr/bin/env python
# -*- coding: utf-8 -*-
# -----------------------------------------------------------------------------
# VisPy - Copyright (c) 2013, Vispy Development Team All rights reserved.
# Distributed under the (new) BSD License. See LICENSE.txt for more info.
# -----------------------------------------------------------------------------
import time
from vispy import app, gl
app.use('qt')
# app.use('glut')
# app.use('pyglet')
canvas = app.Canvas(size=(512,512), title = "Do nothing benchmark (vispy)")
@canvas.connect
def on_paint(event):
global t, t0, frames
gl.glClear(gl.GL_COLOR_BUFFER_BIT | gl.GL_DEPTH_BUFFER_BIT)
t = time.time()
frames = frames + 1
elapsed = (t-t0) # seconds
if elapsed > 2.5:
print( "FPS : %.2f (%d frames in %.2f second)"
% (frames/elapsed, frames, elapsed))
t0, frames = t,0
canvas.update()
t0, frames, t = time.time(),0,0
canvas.show()
#! /usr/bin/env python
# -*- coding: utf-8 -*-
# vispy: testskip
import numpy as np
from vispy import app, gloo
from vispy.geometry import Triangulation
from vispy.visuals.collections import PathCollection, TriangleCollection
canvas = app.Canvas(size=(800, 800), show=True, keys='interactive')
gloo.set_viewport(0, 0, canvas.size[0], canvas.size[1])
gloo.set_state("translucent", depth_test=False)
def triangulate(P):
n = len(P)
S = np.repeat(np.arange(n + 1), 2)[1:-1]
S[-2:] = n - 1, 0
S = S.reshape(len(S) // 2, 2)
T = Triangulation(P[:, :2], S)
T.triangulate()
points = T.pts
triangles = T.tris.ravel()
P = np.zeros((len(points), 3), dtype=np.float32)
P[:, :2] = points
return P, triangles
def star(inner=0.5, outer=1.0, n=5):
R = np.array([inner, outer] * n)
T = np.linspace(0, 2 * np.pi, 2 * n, endpoint=False)
# -----------------------------------------------------------------------------
# Copyright (c) 2014, Nicolas P. Rougier. All Rights Reserved.
# Distributed under the (new) BSD License.
# -----------------------------------------------------------------------------
from vispy import app, gloo
from vispy.util import load_data_file
from vispy.util.svg import Document
from vispy.visuals.collections import PathCollection, PolygonCollection
from vispy.visuals.transforms import PanZoomTransform
path = load_data_file('tiger/tiger.svg')
tiger = Document(path)
width, height = int(tiger.viewport.width), int(tiger.viewport.height)
canvas = app.Canvas(size=(width, height), show=True, keys='interactive')
gloo.set_viewport(0, 0, width, height)
gloo.set_state("translucent", depth_test=True)
panzoom = PanZoomTransform(canvas, aspect=1.0)
paths = PathCollection("agg+",
linewidth='shared',
color="shared",
transform=panzoom)
polys = PolygonCollection("agg", transform=panzoom)
paths.update.connect(canvas.update)
z = 0
for path in tiger.paths:
for vertices, closed in path.vertices:
#!/usr/bin/env python
# -*- coding: utf-8 -*-
# vispy: gallery 1
"""
Simplest Possible Script
========================
"""
import sys
from vispy import app, gloo
canvas = app.Canvas(keys='interactive')
@canvas.connect
def on_draw(event):
gloo.set_clear_color((0.2, 0.4, 0.6, 1.0))
gloo.clear()
canvas.show()
if __name__ == '__main__' and sys.flags.interactive == 0:
app.run()
import numpy as np
from vispy import app, scene
from vispy import gloo
from vispy import io, plot
SIZE = (600, 600)
TITLE = 'Physarum Polycephalum'
c = app.Canvas(keys='interactive', title=TITLE, size=SIZE)
vertex = """
attribute vec2 a_position;
void main (void) {
gl_Position = vec4(a_position, 0.0, 1.0);
}
"""
fragment = """
void main() {
gl_FragColor = vec4(1.0, 1.0, 1.0, 1.0);
}
"""
program = gloo.Program(vertex, fragment)
program['a_position'] = np.c_[
np.random.uniform(-0.5, +0.5, 1000).astype(np.float32),
np.random.uniform(-0.5, +0.5, 1000).astype(np.float32)]
''''''
fname1 = 'teapot.obj'
fname2 = 'sphere.obj'
fig = plot.Fig()
fig[0, 0].mesh(*io.read_mesh(fname1)[:2])
# !/usr/bin/env python
# -*- coding: utf-8 -*-
""" Probably the simplest vispy example
"""
import sys
from vispy import app, gloo
canvas = app.Canvas(show=True, keys='interactive')
@canvas.connect
def on_draw(event):
gloo.set_clear_color((0.2, 0.4, 0.6, 1.0))
gloo.clear()
if __name__ == '__main__' and sys.flags.interactive == 0:
app.run()
# #!/usr/bin/env python
# -*- coding: utf-8 -*-
""" Probably the simplest vispy example
"""
from vispy import app
from vispy.gloo import gl
c = app.Canvas(show=True)
@c.connect
def on_paint(event):
gl.glClearColor(0.2, 0.4, 0.6, 1.0)
gl.glClear(gl.GL_COLOR_BUFFER_BIT)
if __name__ == '__main__':
app.run()
#! /usr/bin/env python
# -*- coding: utf-8 -*-
# vispy: testskip
import numpy as np
from vispy import app, gloo
from vispy.visuals.collections import SegmentCollection
c = app.Canvas(size=(1200, 600), show=True, keys='interactive')
gloo.set_viewport(0, 0, c.size[0], c.size[1])
gloo.set_state("translucent", depth_test=False)
segments = SegmentCollection("agg", linewidth="local")
n = 100
P0 = np.dstack((np.linspace(100, 1100,
n), np.ones(n) * 50, np.zeros(n))).reshape(n, 3)
P0 = 2 * (P0 / (1200, 600, 1)) - 1
P1 = np.dstack((np.linspace(110, 1110,
n), np.ones(n) * 550, np.zeros(n))).reshape(n, 3)
P1 = 2 * (P1 / (1200, 600, 1)) - 1
segments.append(P0, P1, linewidth=np.linspace(1, 8, n))
segments['antialias'] = 1
segments['viewport'] = 0, 0, 1200, 600
@c.connect
def on_draw(e):
gloo.clear('white')
segments.draw()
def main(quantity, radius, speed, max_x, max_y, min_x=0, min_y=0):
def update_atoms():
def collisions():
def collision(f_i, s_i):
f_atom = atom_list[f_i]
s_atom = atom_list[s_i]
dist = ((f_atom.x - s_atom.x)**2 +
(f_atom.y - s_atom.y)**2)**0.5
if dist < radius * 2 and f_i != s_i:
co = abs((s_atom.x - f_atom.x) / dist)
si = abs((s_atom.y - f_atom.y) / dist)
f_atom.s = (f_atom.xs**2 + f_atom.ys**2)**0.5
s_atom.s = (s_atom.xs**2 + s_atom.ys**2)**0.5
if f_atom.x > s_atom.x:
f_atom.x += (radius - dist / 2) * si
s_atom.x -= (radius - dist / 2) * si
f_atom.xs = si * s_atom.s
s_atom.xs = -si * f_atom.s
else:
f_atom.x -= (radius - dist / 2) * si
s_atom.x += (radius - dist / 2) * si
f_atom.xs = -si * s_atom.s
s_atom.xs = si * f_atom.s
if f_atom.y > s_atom.y:
f_atom.y += (radius - dist / 2) * co
s_atom.y -= (radius - dist / 2) * co
f_atom.ys = co * s_atom.s
s_atom.ys = -co * f_atom.s
else:
f_atom.y -= (radius - dist / 2) * co
s_atom.y += (radius - dist / 2) * co
f_atom.ys = -co * s_atom.s
s_atom.ys = co * f_atom.s
grid = []
non_empty_cells = []
for x in range(int(width / diam) + 2):
grid.append([])
for y in range(int(height / diam) + 2):
grid[-1].append([])
for i in range(len(atom_list)):
grid[int(atom_list[i].x / diam)][int(atom_list[i].y /
diam)].append(i)
non_empty_cells.append(
(int(atom_list[i].x / diam), int(atom_list[i].y / diam)))
for x, y in non_empty_cells:
others = grid[x][y] + grid[x][y + 1] + grid[x][y - 1] + grid[
x + 1][y] + grid[x + 1][y - 1] + grid[x + 1][y + 1] + grid[
x - 1][y] + grid[x - 1][y - 1] + grid[x - 1][y + 1]
for atom_i in grid[x][y]:
for other_atom_i in others:
collision(atom_i, other_atom_i)
def apply_speed():
for atom in atom_list:
if atom.x - radius < min_x:
atom.x = min_x + radius
atom.xs *= -1
elif atom.x + radius > max_x:
atom.x = max_x - radius
atom.xs *= -1
if atom.y - radius < min_y:
atom.y = min_y + radius
atom.ys *= -1
elif atom.y + radius > max_y:
atom.y = max_y - radius
atom.ys *= -1
atom.x += atom.xs
atom.y += atom.ys
collisions()
apply_speed()
diam = radius * 2
width = max_x - min_x
height = max_y - min_y
atom_list = []
for i in range(quantity):
angle = uniform(0, 2 * pi)
coeff = 1 #uniform(0.5,2)
atom_list.append(
atom(uniform(min_x + radius, max_x - radius),
uniform(min_y + radius, max_y - radius),
sin(angle) * speed * coeff,
cos(angle) * speed * coeff))
vertex = """
attribute vec2 positions;
uniform float radius;
void main (void)
{
gl_Position = vec4(positions, 0.0, 1.0);
gl_PointSize = 2.0*(radius);
}
"""
fragment = """
in vec2 gl_PointCoord;
void main()
{
float distance = length(vec2(0.5, 0.5) - gl_PointCoord);
if (distance <= 0.5)
gl_FragColor = vec4(0, 0, 0, 1);
else
discard;
}
"""
program = gloo.Program(vertex, fragment)
program['radius'] = radius
c = app.Canvas(keys='interactive', size=(width, height))
@c.connect
def on_draw(event):
if play:
update_atoms()
program['positions'] = [[(atom.x - width / 2) / width * 2,
(atom.y - height / 2) / height * 2]
for atom in atom_list]
gloo.clear((1, 1, 1, 1))
program.draw('points')
c.update()
@c.connect
def on_resize(event):
gloo.set_viewport(0, 0, *event.size)
@c.connect
def on_key_press(event):
if event.key == 'space':
print(play)
play = 0
play = True
c.show()
app.run()
# set colors of field (actually plot data)
rc = 1.-np.zeros([num_ran*num_azi,1])
gc = 1.-np.zeros([num_ran*num_azi,1])
bc = 1.-np.zeros([num_ran*num_azi,1])
cidx = (field_flat[field_flat>0.]*255).astype(int)
rc[field_flat>0.,0] = zh_map[cidx,0]
gc[field_flat>0.,0] = zh_map[cidx,1]
bc[field_flat>0.,0] = zh_map[cidx,2]
rc = np.tile(rc, (1,nvert)).flatten()
gc = np.tile(gc, (1,nvert)).flatten()
bc = np.tile(bc, (1,nvert)).flatten()
data['color'] = np.stack((rc, gc, bc), axis=1)
c = app.Canvas(keys='interactive', size=(800,800))
vertex = """
uniform float scale;
uniform vec2 rel_pos;
attribute vec3 color;
attribute vec2 position;
varying vec3 v_color;
void main()
{
gl_Position = vec4((position+rel_pos)*scale, 0.0, 1.0);
v_color = color;
}
"""
fragment = """
raise RuntimeError(gl.glGetShaderInfoLog(shader))
return shader
def link_shader_program(vertex_shader, fragment_shader):
program = gl.glCreateProgram()
gl.glAttachShader(program, vertex_shader)
gl.glAttachShader(program, fragment_shader)
gl.glLinkProgram(program)
result = gl.glGetProgramiv(program, gl.GL_LINK_STATUS)
if not (result):
raise RuntimeError(gl.glGetProgramInfoLog(program))
return program
canvas = app.Canvas()
@canvas.connect
def on_paint(e):
paint()
def paint():
n = 100
data = np.hstack(
(.2 * np.random.randn(n, 2), np.random.rand(n, 4))).astype(np.float32)
vs = compile_shader(VS, gl.GL_VERTEX_SHADER)
fs = compile_shader(FS, gl.GL_FRAGMENT_SHADER)
if button == 1:
self.move(dxy)
elif button == 2:
center = event.press_event.pos
if self._aspect is None:
self.zoom(np.exp(dxy * (0.01, -0.01)), center)
else:
s = dxy[1] * -0.01
self.zoom(np.exp(np.array([s, s])), center)
def on_mouse_wheel(self, event):
self.zoom(np.exp(event.delta * (0.01, -0.01)), event.pos)
canvas = app.Canvas(keys='interactive',
size=(900, 600),
show=True,
title="Visual Canvas")
pos = np.random.normal(size=(1000, 2), loc=0, scale=50).astype('float32')
pos[0] = [0, 0]
# Make a line visual
line = LineVisual(pos=pos)
line.transforms.canvas = canvas
line.transform = STTransform(scale=(2, 1), translate=(20, 20))
panzoom = PanZoomTransform(canvas)
line.transforms.scene_transform = panzoom
panzoom.changed.connect(lambda ev: canvas.update())
# Attach color filter to all views (current and future) of the visual
line.attach(ColorFilter((1, 1, 0.5, 0.7)))
def __init__(self, parent=None):
super(GraphHigh, self).__init__(parent)
self.canvas = app.Canvas(size=(1800, 600),
keys="interactive",
show=False)
gloo.set_viewport(0, 0, self.canvas.size[0], self.canvas.size[1])
gloo.set_state("translucent", depth_test=False)
# self.setObjectName("ThemeWidget")
# self.setStyleSheet("QWidget#ThemeWidget{background:transparent;border: 0px;}")
# self.canvas.native.setObjectName("ThemeWidget")
# self.canvas.native.setStyleSheet("QWidget#ThemeWidget{background:transparent;border: 0px;}")
self.filter_signal.connect(self.updateMarkerVisible)
vbl = QtWidgets.QVBoxLayout()
vbl.setSpacing(0)
vbl.setContentsMargins(0, 0, 0, 0)
vbl.addWidget(self.canvas.native)
self.setLayout(vbl)
gloo.clear(color="#231e1f")
# gloo.set_state("translucent", depth_test=False,blend=True)
self.canvas.show()
self.pvertex = """
varying float v_size;
varying vec4 v_color;
varying float v_linewidth;
varying float v_antialias;
// Main (hooked)
// ------------------------------------
void main (void)
{
fetch_uniforms();
v_size = size;
v_color = color;
gl_Position = $transform(vec4(position, 1));
gl_PointSize = size + 2.0 * (1.0 + 1.5*1.0);
}
"""
self.pfragment = """
#include "markers/disc.glsl"
#include "antialias/filled.glsl"
// Varyings
// ------------------------------------
varying float v_size;
varying vec4 v_color;
// Main
// ------------------------------------
void main()
{
vec2 P = gl_PointCoord.xy - vec2(0.5,0.5);
float point_size = v_size + 2. * (1.0 + 1.5*1.0);
float distance = marker_disc(P*point_size, v_size);
gl_FragColor = filled(distance, 1.0, 1.0, v_color);
}
"""
self.lvertex = """
#include "misc/viewport-NDC.glsl"
// Externs
// ------------------------------------
// extern vec3 prev;
// extern vec3 curr;
// extern vec3 next;
// extern float id;
// extern vec4 color;
// extern float antialias;
// extern float linewidth;
// extern vec4 viewport;
// vec4 transform(vec3 position);
// Varyings
// ------------------------------------
varying float v_antialias;
varying float v_linewidth;
varying float v_distance;
varying vec4 v_color;
// Main
// ------------------------------------
void main (void)
{
// This function is externally generated
fetch_uniforms();
v_linewidth = linewidth;
v_antialias = antialias;
v_color = color;
// transform prev/curr/next
vec4 prev_ = $transform(vec4(prev, 1));
vec4 curr_ = $transform(vec4(curr, 1));
vec4 next_ = $transform(vec4(next, 1));
// prev/curr/next in viewport coordinates
vec2 _prev = NDC_to_viewport(prev_, viewport.zw);
vec2 _curr = NDC_to_viewport(curr_, viewport.zw);
vec2 _next = NDC_to_viewport(next_, viewport.zw);
// Compute vertex final position (in viewport coordinates)
float w = linewidth/2.0 + 1.5*antialias;
float z;
vec2 P;
if( curr == prev) {
vec2 v = normalize(_next.xy - _curr.xy);
vec2 normal = normalize(vec2(-v.y,v.x));
P = _curr.xy + normal*w*id;
} else if (curr == next) {
vec2 v = normalize(_curr.xy - _prev.xy);
vec2 normal = normalize(vec2(-v.y,v.x));
P = _curr.xy + normal*w*id;
} else {
vec2 v0 = normalize(_curr.xy - _prev.xy);
vec2 v1 = normalize(_next.xy - _curr.xy);
vec2 normal = normalize(vec2(-v0.y,v0.x));
vec2 tangent = normalize(v0+v1);
vec2 miter = vec2(-tangent.y, tangent.x);
float l = abs(w / dot(miter,normal));
P = _curr.xy + miter*l*sign(id);
}
if( abs(id) > 1.5 ) v_color.a = 0.0;
v_distance = w*id;
gl_Position = viewport_to_NDC(vec3(P, curr_.z/curr_.w), viewport.zw);
}
"""
self.lfragment = """
def main(quantity, radius, speed, max_x, max_y, min_x=0, min_y=0):
def update_atoms():
# Finding collisions
for (x, y) in non_empty_cells.copy():
other_atoms_i = grid[x][y] | grid[x][y-1] | grid[x+1][y-1] | grid[x+1][y] | grid[x+1][y+1]
for atom_i in grid[x][y].copy():
for other_atom_i in other_atoms_i:
if atom_i != other_atom_i:
collision(atom_list[atom_i], atom_list[other_atom_i], radius)
nx, ny = int(atom_list[atom_i].x / diam), int(atom_list[atom_i].y / diam)
if (nx, ny) != (x, y):
grid[x][y].discard(atom_i)
grid[nx][ny].add(atom_i)
if (nx, ny) not in non_empty_cells:
non_empty_cells.append((nx, ny))
if not grid[x][y]:
non_empty_cells.remove((x, y))
# Applying speed
for atom in atom_list:
if atom.x - radius < min_x:
atom.x = min_x + radius
atom.xs *= -1
elif atom.x + radius > max_x:
atom.x = max_x - radius
atom.xs *= -1
if atom.y - radius < min_y:
atom.y = min_y + radius
atom.ys *= -1
elif atom.y + radius > max_y:
atom.y = max_y - radius
atom.ys *= -1
atom.x += atom.xs
atom.y += atom.ys
diam = radius * 2
width = max_x - min_x
height = max_y - min_y
atom_list = []
for i in range(quantity):
angle = uniform(0, 2*pi)
coeff = uniform(0.5,2)
atom_list.append(atom(
uniform(min_x + radius, max_x - radius),
uniform(min_y + radius, max_y - radius),
sin(angle) * speed * coeff,
cos(angle) * speed * coeff))
grid = []
for x in range(int(width / diam) + 2):
grid.append([])
for y in range(int(height / diam) + 2):
grid[-1].append(set())
non_empty_cells = []
for i in range(len(atom_list)):
grid[int(atom_list[i].x / diam)][int(atom_list[i].y / diam)].add(i)
non_empty_cells.append((int(atom_list[i].x / diam), int(atom_list[i].y / diam)))
vertex = """
attribute vec2 positions;
uniform float radius;
void main ()
{
gl_Position = vec4(positions, 0.0, 1.0);
gl_PointSize = 2.0*(radius);
}
"""
fragment = """
in vec2 gl_PointCoord;
void main()
{
float distance = length(vec2(0.5, 0.5) - gl_PointCoord);
if (distance <= 0.5)
gl_FragColor = vec4(1, 1, 1, 1);
else
discard;
}
"""
program = gloo.Program(vertex, fragment)
program['radius'] = radius
c = app.Canvas(keys='interactive', size=(width, height))
@c.connect
def on_draw(event):
update_atoms()
program['positions'] = [[(atom.x - width / 2) / width * 2, (atom.y - height / 2) / height * 2] for atom in atom_list]
gloo.clear()
program.draw('points')
c.update()
@c.connect
def on_resize(event):
gloo.set_viewport(0, 0, *event.size)
c.show()
app.run()
def main(quantity, radius, speed, max_x, max_y, min_x=0, min_y=0, loops=None):
def collision(f_i, s_i):
f_atom = atom_list[f_i]
s_atom = atom_list[s_i]
dist = hypot((f_atom.x - s_atom.x), (f_atom.y - s_atom.y))
if dist < radius * 2 and f_i != s_i:
co = abs((s_atom.x - f_atom.x) / dist)
si = abs((s_atom.y - f_atom.y) / dist)
sphere_dist = radius - dist / 2
f_atom.s = (f_atom.xs**2 + f_atom.ys**2)**0.5
s_atom.s = (s_atom.xs**2 + s_atom.ys**2)**0.5
if f_atom.x > s_atom.x:
f_atom.xb += sphere_dist * si
s_atom.xb -= sphere_dist * si
f_atom.xs = si * s_atom.s
s_atom.xs = -si * f_atom.s
else:
f_atom.xb -= sphere_dist * si
s_atom.xb += sphere_dist * si
f_atom.xs = -si * s_atom.s
s_atom.xs = si * f_atom.s
if f_atom.y > s_atom.y:
f_atom.yb += sphere_dist * co
s_atom.yb -= sphere_dist * co
f_atom.ys = co * s_atom.s
s_atom.ys = -co * f_atom.s
else:
f_atom.yb -= sphere_dist * co
s_atom.yb += sphere_dist * co
f_atom.ys = -co * s_atom.s
s_atom.ys = co * f_atom.s
def update_atoms():
# Find collisions
fcol_t = time.perf_counter()
for (x, y) in non_empty_cells:
other_atoms_i = grid[x][y] + grid[x][y - 1] + grid[x + 1][
y - 1] + grid[x + 1][y] + grid[x + 1][y + 1]
#~ other_atoms_i = (x for cell in (grid[x][y], grid[x][y-1], grid[x+1][y-1], grid[x+1][y], grid[x+1][y+1]) for x in cell)
for atom_i in grid[x][y]:
for other_atom_i in other_atoms_i:
collision(atom_i, other_atom_i)
fcol_t = time.perf_counter() - fcol_t
# Apply speed
aplspd_t = time.perf_counter()
for atom in atom_list:
if atom.x - radius < min_x:
atom.x = min_x + radius
atom.xs *= -1
elif atom.x + radius > max_x:
atom.x = max_x - radius
atom.xs *= -1
if atom.y - radius < min_y:
atom.y = min_y + radius
atom.ys *= -1
elif atom.y + radius > max_y:
atom.y = max_y - radius
atom.ys *= -1
atom.x += atom.xs + atom.xb
atom.y += atom.ys + atom.yb
atom.xb = 0
atom.yb = 0
aplspd_t = time.perf_counter() - aplspd_t
# Update grid
updgrd_t = time.perf_counter()
for (x, y) in non_empty_cells.copy():
for atom_i in grid[x][y].copy():
nx, ny = int(atom_list[atom_i].x / diam), int(
atom_list[atom_i].y / diam)
if (nx, ny) != (x, y):
grid[x][y].remove(atom_i)
grid[nx][ny].append(atom_i)
if (nx, ny) not in non_empty_cells:
non_empty_cells.append((nx, ny))
if len(grid[x][y]) == 0:
non_empty_cells.remove((x, y))
updgrd_t = time.perf_counter() - updgrd_t
# Return time spent
return fcol_t, aplspd_t, updgrd_t
diam = radius * 2
width = max_x - min_x
height = max_y - min_y
atom_list = []
for i in range(quantity):
angle = uniform(0, 2 * pi)
coeff = uniform(0.5, 2)
atom_list.append(
atom(uniform(min_x + radius, max_x - radius),
uniform(min_y + radius, max_y - radius),
sin(angle) * speed * coeff,
cos(angle) * speed * coeff))
grid = []
for x in range(int(width / diam) + 2):
grid.append([])
for y in range(int(height / diam) + 2):
grid[-1].append([])
non_empty_cells = []
for i in range(len(atom_list)):
x, y = int(atom_list[i].x / diam), int(atom_list[i].y / diam)
grid[x][y].append(i)
if (x, y) not in non_empty_cells:
non_empty_cells.append((x, y))
vertex = """
attribute vec2 positions;
uniform float radius;
void main(void)
{
gl_Position = vec4(positions, 0.0, 1.0);
gl_PointSize = 2.0*(radius);
}
"""
fragment = """
void main(void)
{
float distance = length(vec2(0.5, 0.5) - gl_PointCoord);
if (distance <= 0.5)
gl_FragColor = vec4(1, 1, 1, 1);
else
discard;
}
"""
program = gloo.Program(vertex, fragment)
program['radius'] = radius
c = app.Canvas(keys='interactive', size=(width, height))
#~ update_times = []
@c.connect
def on_draw(event):
#~ nonlocal loops
runtime = update_atoms()
#~ if loops != None:
#~ update_times.append(runtime)
#~ loops -= 1
#~ if loops == 0:
#~ fcol_t, aplspd_t, updgrd_t = [sum(times) / len(times) for times in zip(*update_times)]
#~ print(fcol_t, aplspd_t, updgrd_t)
positions = [[(atom.x - width / 2) / width * 2,
(atom.y - height / 2) / height * 2]
for atom in atom_list]
program['positions'] = positions
print(positions)
gloo.clear()
program.draw('points')
c.update()
@c.connect
def on_resize(event):
gloo.set_viewport(0, 0, *event.size)
c.show()
app.run()