/
visualization_opengl.pyx
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/
visualization_opengl.pyx
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from OpenGL.GLUT import *
from OpenGL.GLU import *
from OpenGL.GL import *
from math import *
import math
import numpy as np
import os
import time
import espressomd
import collections
import scipy.spatial
include "myconfig.pxi"
class openGLLive(object):
def __init__(self, system, **kwargs):
# DEFAULT PROPERTIES
self.specs = {
'window_size': [800, 800],
'name': 'Espresso Visualization',
'background_color': [0, 0, 0],
'update_fps': 30.0,
'periodic_images': [0, 0, 0],
'draw_box': True,
'quality_particles': 16,
'quality_bonds': 16,
'quality_arrows': 16,
'quality_constraints': 32,
'close_cut_distance': 0.1,
'far_cut_distance': 5,
'camera_position': 'auto',
'camera_rotation': [3.55, -0.4],
'particle_coloring': 'auto',
'particle_sizes': 'auto',
'particle_type_colors': [[1, 1, 0, 1], [1, 0, 1, 1], [0, 0, 1, 1], [0, 1, 1, 1], [1, 1, 1, 1], [1, 0.5, 0, 1], [0.5, 0, 1, 1]],
'particle_type_materials': [[0.6, 1, 0.1], [0.6, 1, 0.1], [0.6, 1, 0.1], [0.6, 1, 0.1], [0.6, 1, 0.1], [0.6, 1, 0.1], [0.6, 1, 0.1]],
'particle_charge_colors': [[1, 0, 0, 1], [0, 1, 0, 1]],
'draw_constraints': True,
'rasterize_pointsize': 10,
'rasterize_resolution': 75.0,
'constraint_type_colors': [[0.5, 0.5, 0.5, 0.9], [0, 0.5, 0.5, 0.9], [0.5, 0, 0.5, 0.9], [0.5, 0.5, 0, 0.9], [0, 0, 0.5, 0.9], [0.5, 0, 0, 0.9]],
'constraint_type_materials': [[0.6, 1, 0.1], [0.6, 1, 0.1], [0.6, 1, 0.1], [0.6, 1, 0.1], [0.6, 1, 0.1], [0.6, 1, 0.1], [0.6, 1, 0.1]],
'draw_bonds': True,
'bond_type_radius': [0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5],
'bond_type_colors': [[1, 1, 1, 1], [1, 0, 1, 1], [0, 0, 1, 1], [0, 1, 1, 1], [1, 1, 0, 1], [1, 0.5, 0, 1], [0.5, 0, 1, 1]],
'bond_type_materials': [[0.6, 1, 0.1], [0.6, 1, 0.1], [0.6, 1, 0.1], [0.6, 1, 0.1], [0.6, 1, 0.1], [0.6, 1, 0.1], [0.6, 1, 0.1]],
'ext_force_arrows': True,
'ext_force_arrows_scale': [1, 1, 1, 1, 1, 1, 1],
'LB': False,
'light_pos': 'auto',
'light_colors': [[0.1, 0.1, 0.2, 1.0], [0.9, 0.9, 0.9, 1.0], [1.0, 1.0, 1.0, 1.0]],
'light_brightness': 1.0,
'light_size': 'auto',
'spotlight_enabled': True,
'spotlight_colors': [[0.1, 0.1, 0.2, 1.0], [0.5, 0.5, 0.5, 1.0], [1.0, 1.0, 1.0, 1.0]],
'spotlight_angle': 45,
'spotlight_focus': 1,
'spotlight_brightness': 0.4,
'drag_enabled': False,
'drag_force': 3.0
}
# OVERWRITE WITH USER PROPERTIES
for key in kwargs.iterkeys():
if key not in self.specs.iterkeys():
raise ValueError(
key + ' is not a valid visualization property')
else:
self.specs[key] = kwargs[key]
# DEPENDENCIES
IF not EXTERNAL_FORCES:
self.specs['drag_enabled'] = False
self.invBackgroundCol = np.array([1 - self.specs['background_color'][0], 1 -
self.specs['background_color'][1], 1 - self.specs['background_color'][2]])
self.system = system
self.started = False
self.keyboardManager = KeyboardManager()
self.mouseManager = MouseManager()
self.timers = []
# CALLBACKS FOR THE MAIN THREAD
def registerCallback(self, cb, interval=1000):
self.timers.append((int(interval), cb))
# THE BLOCKING START METHOD
def start(self):
self.initOpenGL()
self.initEspressoVisualization()
self.initCamera()
self.initControls()
self.initCallbacks()
# POST DISPLAY WITH 60FPS
def timed_update_redraw(data):
glutPostRedisplay()
self.keyboardManager.handleInput()
glutTimerFunc(17, timed_update_redraw, -1)
# PLACE LIGHT AT PARTICLE CENTER, DAMPED SPRING FOR SMOOTH POSITION
# CHANGE, CALL WITH 10FPS
def timed_update_centerLight(data):
if self.hasParticleData:
ldt = 0.8
cA = (self.particle_COM - self.smooth_light_pos) * \
0.1 - self.smooth_light_posV * 1.8
self.smooth_light_posV += ldt * cA
self.smooth_light_pos += ldt * self.smooth_light_posV
self.updateLightPos = True
glutTimerFunc(100, timed_update_centerLight, -1)
# AVERAGE PARTICLE COM ONLY EVERY 2sec
def timed_update_particleCOM(data):
if self.hasParticleData:
if len(self.particles['coords']) > 0:
self.particle_COM = np.average(
self.particles['coords'], axis=0)
glutTimerFunc(2000, timed_update_particleCOM, -1)
self.started = True
self.hasParticleData = False
glutTimerFunc(17, timed_update_redraw, -1)
if self.specs['light_pos'] == 'auto':
glutTimerFunc(2000, timed_update_particleCOM, -1)
glutTimerFunc(60, timed_update_centerLight, -1)
# START THE BLOCKING MAIN LOOP
glutMainLoop()
# CALLED FROM ESPRESSO INTEGRATION LOOP
# CHANGES OF ESPRESSO SYSTEM CAN ONLY HAPPEN HERE
def update(self):
if self.started:
# UPDATE ON STARTUP
if not self.hasParticleData:
self.updateParticles()
self.updateChargeColorRange()
self.updateBonds()
self.updateConstraints()
self.hasParticleData = True
# IF CALLED TOO OFTEN, ONLY UPDATE WITH GIVEN FREQ
self.elapsedTime += (time.time() - self.measureTimeBeforeIntegrate)
if self.elapsedTime > 1.0 / self.specs['update_fps']:
self.elapsedTime = 0
self.updateParticles()
# KEYBOARD CALLBACKS MAY CHANGE ESPRESSO SYSTEM PROPERTIES,
# ONLY SAVE TO CHANGE HERE
for c in self.keyboardManager.userCallbackStack:
c()
self.keyboardManager.userCallbackStack = []
self.measureTimeBeforeIntegrate = time.time()
IF EXTERNAL_FORCES:
if self.triggerSetParticleDrag == True and self.dragId != -1:
self.system.part[self.dragId].ext_force = self.dragExtForce
self.triggerSetParticleDrag = False
elif self.triggerResetParticleDrag == True and self.dragId != -1:
self.system.part[self.dragId].ext_force = self.extForceOld
self.triggerResetParticleDrag = False
self.dragId = -1
# GET THE PARTICLE DATA
def updateParticles(self):
IF EXTERNAL_FORCES and ELECTROSTATICS:
self.particles = {'coords': self.system.part[:].pos_folded,
'types': self.system.part[:].type,
'ext_forces': self.system.part[:].ext_force,
'charges': self.system.part[:].q}
ELIF EXTERNAL_FORCES and not ELECTROSTATICS:
self.particles = {'coords': self.system.part[:].pos_folded,
'types': self.system.part[:].type,
'ext_forces': self.system.part[:].ext_force,
'charges': [0] * len(self.system.part)}
ELIF not EXTERNAL_FORCES and ELECTROSTATICS:
self.particles = {'coords': self.system.part[:].pos_folded,
'types': self.system.part[:].type,
'ext_forces': [0, 0, 0] * len(self.system.part),
'charges': self.system.part[:].q}
ELIF not EXTERNAL_FORCES and not ELECTROSTATICS:
self.particles = {'coords': self.system.part[:].pos_folded,
'types': self.system.part[:].type,
'ext_forces': [0, 0, 0] * len(self.system.part),
'charges': [0] * len(self.system.part)}
def edgesFromPN(self, p, n, diag):
v1, v2 = self.getTangents(n)
edges = []
edges.append(p + diag * v1)
edges.append(p + diag * v2)
edges.append(p - diag * v1)
edges.append(p - diag * v2)
return edges
# GET THE CONSTRAINT DATA
def updateConstraints(self):
box_diag = pow(pow(self.system.box_l[0], 2) + pow(
self.system.box_l[1], 2) + pow(self.system.box_l[1], 2), 0.5)
self.shapes = collections.defaultdict(list)
# Collect shapes and interaction type (for coloring) from constraints
coll_shape_obj = collections.defaultdict(list)
for c in self.system.constraints:
if type(c) == espressomd.constraints.ShapeBasedConstraint:
t = c.get_parameter('particle_type')
s = c.get_parameter('shape')
n = s.name()
if n in ['Shapes::Wall', 'Shapes::Cylinder', 'Shapes::Sphere', 'Shapes::SpheroCylinder']:
coll_shape_obj[n].append([s, t])
else:
coll_shape_obj['Shapes::Misc'].append([s, t])
# TODO: get shapes from lbboundaries
for s in coll_shape_obj['Shapes::Wall']:
d = s[0].get_parameter('dist')
n = s[0].get_parameter('normal')
edges = self.edgesFromPN(d * np.array(n), n, 2 * box_diag)
self.shapes['Shapes::Wall'].append([edges, s[1]])
for s in coll_shape_obj['Shapes::Cylinder']:
pos = np.array(s[0].get_parameter('center'))
a = np.array(s[0].get_parameter('axis'))
l = s[0].get_parameter('length')
r = s[0].get_parameter('radius')
self.shapes['Shapes::Cylinder'].append(
[pos - a * l * 0.5, pos + a * l * 0.5, r, s[1]])
for s in coll_shape_obj['Shapes::Sphere']:
pos = np.array(s[0].get_parameter('center'))
r = s[0].get_parameter('radius')
self.shapes['Shapes::Sphere'].append([pos, r, s[1]])
for s in coll_shape_obj['Shapes::SpheroCylinder']:
pos = np.array(s[0].get_parameter('center'))
a = np.array(s[0].get_parameter('axis'))
l = s[0].get_parameter('length')
r = s[0].get_parameter('radius')
self.shapes['Shapes::SpheroCylinder'].append(
[pos - a * l * 0.5, pos + a * l * 0.5, r, s[1]])
for s in coll_shape_obj['Shapes::Misc']:
self.shapes['Shapes::Misc'].append(
[self.rasterizeBruteForce(s[0]), s[1]])
def getTangents(self, n):
if n[0] > 0.5 or n[1] > 0.5:
v1 = np.array([n[1], -n[0], 0])
else:
v1 = np.array([-n[2], 0, n[0]])
v2 = np.cross(n, v1)
v1 /= np.linalg.norm(v1)
v2 /= np.linalg.norm(v2)
return v1, v2
def rasterizeBruteForce(self, shape):
sp = max(self.system.box_l) / self.specs['rasterize_resolution']
res = np.array(self.system.box_l) / sp
points = []
for i in range(int(res[0])):
for j in range(int(res[1])):
for k in range(int(res[2])):
p = np.array([i, j, k]) * sp
dist, vec = shape.call_method(
"calc_distance", position=p.tolist())
if not np.isnan(vec).any() and not np.isnan(dist) and abs(dist) < sp and dist != 0:
points.append((p - vec).tolist())
return points
# GET THE BOND DATA, SO FAR CALLED ONCE UPON INITIALIZATION
def updateBonds(self):
if self.specs['draw_bonds']:
self.bonds = []
for i in range(len(self.system.part)):
bs = self.system.part[i].bonds
for b in bs:
t = b[0].type_number()
# b[0]: Bond, b[1:] Partners
for p in b[1:]:
self.bonds.append([i, p, t])
# DRAW CALLED AUTOMATICALLY FROM GLUT DISPLAY FUNC
def draw(self):
if self.specs['LB']:
self.drawLBVel()
if self.specs['draw_box']:
self.drawSystemBox()
self.drawSystemParticles()
if self.specs['draw_bonds']:
self.drawBonds()
if self.specs['draw_constraints']:
self.drawConstraints()
def drawSystemBox(self):
drawBox([0, 0, 0], self.system.box_l, self.invBackgroundCol)
def drawConstraints(self):
for i in range(6):
glEnable(GL_CLIP_PLANE0 + i)
glClipPlane(GL_CLIP_PLANE0 + i, self.box_eqn[i])
for s in self.shapes['Shapes::Sphere']:
drawSphere(s[0], s[1], self.modulo_indexing(self.specs['constraint_type_colors'], s[2]), self.modulo_indexing(
self.specs['constraint_type_materials'], s[2]), self.specs['quality_constraints'])
for s in self.shapes['Shapes::SpheroCylinder']:
drawSpheroCylinder(
s[0], s[1], s[2], self.modulo_indexing(
self.specs['constraint_type_colors'], s[3]),
self.modulo_indexing(self.specs['constraint_type_materials'], s[3]), self.specs['quality_constraints'])
for s in self.shapes['Shapes::Wall']:
drawPlane(
s[0], self.modulo_indexing(
self.specs['constraint_type_colors'], s[1]),
self.modulo_indexing(self.specs['constraint_type_materials'], s[1]))
for s in self.shapes['Shapes::Cylinder']:
drawCylinder(s[0], s[1], s[2], self.modulo_indexing(self.specs['constraint_type_colors'], s[3]), self.modulo_indexing(
self.specs['constraint_type_materials'], s[3]), self.specs['quality_constraints'], True)
box_diag = pow(pow(self.system.box_l[0], 2) + pow(
self.system.box_l[1], 2) + pow(self.system.box_l[1], 2), 0.5)
for s in self.shapes['Shapes::Misc']:
drawPoints(s[0], self.specs['rasterize_pointsize'], self.modulo_indexing(
self.specs['constraint_type_colors'], s[1]), self.modulo_indexing(self.specs['constraint_type_materials'], s[1]))
for i in range(6):
glDisable(GL_CLIP_PLANE0 + i)
def determine_radius(self, ptype):
def radiusByLJ(ptype):
try:
radius = self.system.non_bonded_inter[ptype, ptype].lennard_jones.get_params()[
'sigma'] * 0.5
except:
radius = 0.5
if radius == 0:
radius = 0.5
return radius
if self.specs['particle_sizes'] == 'auto':
radius = radiusByLJ(ptype)
elif callable(self.specs['particle_sizes']):
radius = self.specs['particle_sizes'](ptype)
else:
try:
radius = self.modulo_indexing(
self.specs['particle_sizes'], ptype)
except:
radius = self.radiusByLJ(ptype)
return radius
def drawSystemParticles(self):
coords = self.particles['coords']
pIds = range(len(coords))
for pid in pIds:
pos = coords[pid]
q = self.particles['charges'][pid]
ptype = self.particles['types'][pid]
ext_f = self.particles['ext_forces'][pid]
radius = self.determine_radius(ptype)
material = self.modulo_indexing(
self.specs['particle_type_materials'], ptype)
if self.specs['particle_coloring'] == 'id':
color = self.IdToColorf(pid)
glColor(color)
elif self.specs['particle_coloring'] == 'auto':
# Color auto: Charge then Type
if q != 0:
color = self.colorByCharge(q)
else:
color = self.modulo_indexing(
self.specs['particle_type_colors'], ptype)
elif self.specs['particle_coloring'] == 'charge':
color = self.colorByCharge(q)
elif self.specs['particle_coloring'] == 'type':
color = self.modulo_indexing(
self.specs['particle_type_colors'], ptype)
drawSphere(pos, radius, color, material,
self.specs['quality_particles'])
for imx in range(-self.specs['periodic_images'][0], self.specs['periodic_images'][0] + 1):
for imy in range(-self.specs['periodic_images'][1], self.specs['periodic_images'][1] + 1):
for imz in range(-self.specs['periodic_images'][2], self.specs['periodic_images'][2] + 1):
if imx != 0 or imy != 0 or imz != 0:
redrawSphere(
pos + (imx * self.imPos[0] + imy * self.imPos[1] + imz * self.imPos[2]), radius, self.specs['quality_particles'])
if self.specs['ext_force_arrows'] or pid == self.dragId:
if ext_f[0] != 0 or ext_f[1] != 0 or ext_f[2] != 0:
if pid == self.dragId:
sc = 1
else:
sc = self.modulo_indexing(
self.specs['ext_force_arrows_scale'], ptype)
if sc > 0:
drawArrow(pos, np.array(ext_f) * sc, 0.25 *
sc, [1, 1, 1], self.specs['quality_arrows'])
def drawBonds(self):
coords = self.particles['coords']
pIds = range(len(coords))
b2 = self.system.box_l[0] / 2.0
box_l2_sqr = pow(b2, 2.0)
for b in self.bonds:
col = self.modulo_indexing(self.specs['bond_type_colors'], b[2])
mat = self.modulo_indexing(self.specs['bond_type_materials'], b[2])
radius = self.modulo_indexing(self.specs['bond_type_radius'], b[2])
d = coords[b[0]] - coords[b[1]]
bondLen_sqr = d[0] * d[0] + d[1] * d[1] + d[2] * d[2]
if bondLen_sqr < box_l2_sqr:
drawCylinder(coords[b[0]], coords[b[1]], radius,
col, mat, self.specs['quality_bonds'])
for imx in range(-self.specs['periodic_images'][0], self.specs['periodic_images'][0] + 1):
for imy in range(-self.specs['periodic_images'][1], self.specs['periodic_images'][1] + 1):
for imz in range(-self.specs['periodic_images'][2], self.specs['periodic_images'][2] + 1):
if imx != 0 or imy != 0 or imz != 0:
im = np.array([imx, imy, imz])
drawCylinder(coords[b[0]] + im * self.imPos[dim], coords[b[1]] +
im * self.imPos[dim], radius, col, mat, self.specs['quality_bonds'])
else:
l = coords[b[0]] - coords[b[1]]
l0 = coords[b[0]]
hits = 0
for i in range(6):
lineBoxNDot = float(np.dot(l, self.box_n[i]))
if lineBoxNDot == 0:
continue
s = l0 - \
np.dot(l0 - self.box_p[i],
self.box_n[i]) / lineBoxNDot * l
if self.isInsideBox(s):
if lineBoxNDot < 0:
s0 = s
else:
s1 = s
hits += 1
if hits >= 2:
break
drawCylinder(coords[b[0]], s0, radius, col,
mat, self.specs['quality_bonds'])
drawCylinder(coords[b[1]], s1, radius, col,
mat, self.specs['quality_bonds'])
for imx in range(-self.specs['periodic_images'][0], self.specs['periodic_images'][0] + 1):
for imy in range(-self.specs['periodic_images'][1], self.specs['periodic_images'][1] + 1):
for imz in range(-self.specs['periodic_images'][2], self.specs['periodic_images'][2] + 1):
if imx != 0 or imy != 0 or imz != 0:
im = np.array([imx, imy, imz])
drawCylinder(coords[b[0]] + im * self.imPos[dim], s0 + im *
self.imPos[dim], radius, col, mat, self.specs['quality_bonds'])
drawCylinder(coords[b[1]] + im * self.imPos[dim], s1 + im *
self.imPos[dim], radius, col, mat, self.specs['quality_bonds'])
# HELPER TO DRAW PERIODIC BONDS
def isInsideBox(self, p):
eps = 1e-5
for i in range(3):
if p[i] < -eps or p[i] > eps + self.system.box_l[i]:
return False
return True
# VOXELS FOR LB VELOCITIES
def drawLBVel(self):
grid = 10
velRelax = 0.2
cubeSize = grid * 0.25
r = np.array([grid] * 3)
min_vel_new = np.array([1e100] * 3)
max_vel_new = np.array([-1e100] * 3)
for ix in range(r[0]):
for iy in range(r[1]):
for iz in range(r[2]):
c = self.system.box_l * \
(np.array([ix, iy, iz]) +
np.array([0.5, 0.5, 0.5])) / r
v = self.system.actors[0].lbnode_get_node_velocity(c)
col = (np.array(v) - self.lb_min_vel) / self.lb_vel_range
alpha = 0.1 # np.linalg.norm(col)
drawCube(c, cubeSize, col, alpha)
# USE MODULO IF THERE ARE MORE PARTICLE TYPES THAN TYPE DEFINITIONS FOR
# COLORS, MATERIALS ETC..
def modulo_indexing(self, l, t):
return l[t % len(l)]
# FADE PARTICE CHARGE COLOR FROM WHITE (q=0) to PLUSCOLOR (q=q_max) RESP
# MINUSCOLOR (q=q_min)
def colorByCharge(self, q):
if q < 0:
c = 1.0 * q / self.minq
return np.array(self.specs['particle_charge_colors'][0]) * c + (1 - c) * np.array([1, 1, 1, 1])
else:
c = 1.0 * q / self.maxq
return np.array(self.specs['particle_charge_colors'][1]) * c + (1 - c) * np.array([1, 1, 1, 1])
# ON INITIALIZATION, CHECK q_max/q_min
def updateChargeColorRange(self):
if len(self.particles['charges'][:]) > 0:
self.minq = min(self.particles['charges'][:])
self.maxq = max(self.particles['charges'][:])
# INITS FOR GLUT FUNCTIONS
def initCallbacks(self):
# OpenGl Callbacks
def display():
if self.hasParticleData:
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
glLoadIdentity()
self.camera.glLookAt()
if self.updateLightPos:
self.setLightPos()
self.updateLightPos = False
self.camera.rotateSystem()
self.draw()
glutSwapBuffers()
return
def keyboardUp(button, x, y):
self.keyboardManager.keyboardUp(button)
return
def keyboardDown(button, x, y):
self.keyboardManager.keyboardDown(button)
return
def mouse(button, state, x, y):
self.mouseManager.mouseClick(button, state, x, y)
return
def motion(x, y):
self.mouseManager.mouseMove(x, y)
return
def idleUpdate():
return
# CALLED ION WINDOW POSITION/SIZE CHANGE
def reshapeWindow(w, h):
glViewport(0, 0, w, h)
glMatrixMode(GL_PROJECTION)
glLoadIdentity()
box_diag = pow(pow(self.system.box_l[0], 2) + pow(
self.system.box_l[1], 2) + pow(self.system.box_l[1], 2), 0.5)
gluPerspective(
40, 1.0 * w / h, self.specs['close_cut_distance'], self.specs['far_cut_distance'] * box_diag)
glMatrixMode(GL_MODELVIEW)
self.specs['window_size'][0] = 1.0 * w
self.specs['window_size'][1] = 1.0 * h
# glPushMatrix()
# TIMERS FOR registerCallback
def dummyTimer(index):
self.timers[index][1]()
glutTimerFunc(self.timers[index][0], dummyTimer, index)
glutDisplayFunc(display)
glutMouseFunc(mouse)
glutKeyboardFunc(keyboardDown)
glutKeyboardUpFunc(keyboardUp)
glutReshapeFunc(reshapeWindow)
glutMotionFunc(motion)
glutIdleFunc(idleUpdate)
index = 0
for t in self.timers:
glutTimerFunc(t[0], dummyTimer, index)
index += 1
# CLICKED ON PARTICLE: DRAG; CLICKED ON BACKGROUND: CAMERA
def mouseMotion(self, mousePos, mousePosOld, mouseButtonState):
if self.dragId != -1:
ppos = self.particles['coords'][self.dragId]
viewport = glGetIntegerv(GL_VIEWPORT)
mouseWorld = gluUnProject(
mousePos[0], viewport[3] - mousePos[1], self.depth)
self.dragExtForce = self.specs['drag_force'] * \
(np.asarray(mouseWorld) - np.array(ppos))
self.triggerSetParticleDrag = True
else:
self.camera.rotateCamera(mousePos, mousePosOld, mouseButtonState)
# DRAW SCENE AGAIN WITHOUT LIGHT TO IDENTIFY PARTICLE ID BY PIXEL COLOR
def setParticleDrag(self, pos, pos_old):
glClearColor(0.0, 0.0, 0.0, 1.0)
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
glLoadIdentity()
self.camera.glLookAt()
self.camera.rotateSystem()
oldColMode = self.specs['particle_coloring']
self.specs['particle_coloring'] = 'id'
glDisable(GL_LIGHTING)
glDisable(GL_LIGHT0)
if self.specs['spotlight_enabled']:
glDisable(GL_LIGHT1)
self.drawSystemParticles()
viewport = glGetIntegerv(GL_VIEWPORT)
readPixel = glReadPixelsui(
pos[0], viewport[3] - pos[1], 1, 1, GL_RGB, GL_FLOAT)[0][0]
depth = glReadPixelsf(
pos[0], viewport[3] - pos[1], 1, 1, GL_DEPTH_COMPONENT, GL_FLOAT)[0][0]
pid = self.fcolorToId(readPixel)
self.dragId = pid
if pid != -1:
self.dragPosInitial = self.particles['coords'][self.dragId]
self.extForceOld = self.particles['ext_forces'][self.dragId][:]
self.depth = depth
self.specs['particle_coloring'] = oldColMode
glEnable(GL_LIGHTING)
glEnable(GL_LIGHT0)
if self.specs['spotlight_enabled']:
glEnable(GL_LIGHT1)
glClearColor(self.specs['background_color'][0],
self.specs['background_color'][1],
self.specs['background_color'][2], 1.)
def resetParticleDrag(self, pos, pos_old):
if self.dragId != -1:
self.triggerResetParticleDrag = True
def IdToColorf(self, pid):
pid += 1
return [int(pid / (256 * 256)) / 255.0, int((pid % (256 * 256)) / 256) / 255.0, (pid % 256) / 255.0, 1.0]
def fcolorToId(self, fcol):
if (fcol == [0, 0, 0]).all():
return -1
else:
return 256 * 256 * int(fcol[0] * 255) + 256 * int(fcol[1] * 255) + int(fcol[2] * 255) - 1
# ALL THE INITS
def initEspressoVisualization(self):
self.maxq = 0
self.minq = 0
self.dragId = -1
self.dragPosInitial = []
self.extForceOld = []
self.dragExtForceOld = []
self.triggerResetParticleDrag = False
self.triggerSetParticleDrag = False
self.depth = 0
self.imPos = [np.array([self.system.box_l[0], 0, 0]), np.array(
[0, self.system.box_l[1], 0]), np.array([0, 0, self.system.box_l[2]])]
self.lb_min_vel = np.array([-1e-6] * 3)
self.lb_max_vel = np.array([1e-6] * 3)
self.lb_vel_range = self.lb_max_vel - self.lb_min_vel
self.lb_min_dens = np.array([0] * 3)
self.lb_max_dens = np.array([0] * 3)
self.elapsedTime = 0
self.measureTimeBeforeIntegrate = 0
self.boxSizeDependence()
# BOX PLANES (NORMAL, ORIGIN) FOR PERIODIC BONDS
def boxSizeDependence(self):
self.box_n = [np.array([1, 0, 0]), np.array([0, 1, 0]), np.array(
[0, 0, 1]), np.array([-1, 0, 0]), np.array([0, -1, 0]), np.array([0, 0, -1])]
self.box_p = [np.array([0, 0, 0]), np.array([0, 0, 0]), np.array([0, 0, 0]), np.array(
self.system.box_l), np.array(self.system.box_l), np.array(self.system.box_l)]
self.box_eqn = []
self.box_eqn.append(
(self.box_n[0][0], self.box_n[0][1], self.box_n[0][2], self.system.box_l[0] * 0.001))
self.box_eqn.append(
(self.box_n[1][0], self.box_n[1][1], self.box_n[1][2], self.system.box_l[1] * 0.001))
self.box_eqn.append(
(self.box_n[2][0], self.box_n[2][1], self.box_n[2][2], self.system.box_l[2] * 0.001))
self.box_eqn.append(
(self.box_n[3][0], self.box_n[3][1], self.box_n[3][2], self.system.box_l[0] * 1.001))
self.box_eqn.append(
(self.box_n[4][0], self.box_n[4][1], self.box_n[4][2], self.system.box_l[1] * 1.001))
self.box_eqn.append(
(self.box_n[5][0], self.box_n[5][1], self.box_n[5][2], self.system.box_l[2] * 1.001))
# DEFAULT CONTROLS
def initControls(self):
# MOUSE LOOK/ROTATE/DRAG
self.mouseManager.registerButton(MouseButtonEvent(
None, MouseFireEvent.FreeMotion, self.mouseMotion))
self.mouseManager.registerButton(MouseButtonEvent(
3, MouseFireEvent.ButtonPressed, self.camera.moveForward))
self.mouseManager.registerButton(MouseButtonEvent(
4, MouseFireEvent.ButtonPressed, self.camera.moveBackward))
# START/STOP DRAG
if self.specs['drag_enabled']:
self.mouseManager.registerButton(MouseButtonEvent(
GLUT_LEFT_BUTTON, MouseFireEvent.ButtonPressed, self.setParticleDrag, True))
self.mouseManager.registerButton(MouseButtonEvent(
GLUT_LEFT_BUTTON, MouseFireEvent.ButtonReleased, self.resetParticleDrag, True))
# KEYBOARD BUTTONS
self.keyboardManager.registerButton(KeyboardButtonEvent(
'w', KeyboardFireEvent.Hold, self.camera.moveForward, True))
self.keyboardManager.registerButton(KeyboardButtonEvent(
's', KeyboardFireEvent.Hold, self.camera.moveBackward, True))
self.keyboardManager.registerButton(KeyboardButtonEvent(
'a', KeyboardFireEvent.Hold, self.camera.moveLeft, True))
self.keyboardManager.registerButton(KeyboardButtonEvent(
'd', KeyboardFireEvent.Hold, self.camera.moveRight, True))
self.keyboardManager.registerButton(KeyboardButtonEvent(
'e', KeyboardFireEvent.Hold, self.camera.rotateSystemXR, True))
self.keyboardManager.registerButton(KeyboardButtonEvent(
'q', KeyboardFireEvent.Hold, self.camera.rotateSystemXL, True))
self.keyboardManager.registerButton(KeyboardButtonEvent(
'z', KeyboardFireEvent.Hold, self.camera.rotateSystemYR, True))
self.keyboardManager.registerButton(KeyboardButtonEvent(
'c', KeyboardFireEvent.Hold, self.camera.rotateSystemYL, True))
self.keyboardManager.registerButton(KeyboardButtonEvent(
'r', KeyboardFireEvent.Hold, self.camera.rotateSystemZR, True))
self.keyboardManager.registerButton(KeyboardButtonEvent(
'f', KeyboardFireEvent.Hold, self.camera.rotateSystemZL, True))
# ASYNCHRONOUS PARALLEL CALLS OF glLight CAUSES SEG FAULTS, SO ONLY CHANGE
# LIGHT AT CENTRAL display METHOD AND TRIGGER CHANGES
def setLightPos(self):
if self.specs['light_pos'] == 'auto':
glLightfv(GL_LIGHT0, GL_POSITION, [
self.smooth_light_pos[0], self.smooth_light_pos[1], self.smooth_light_pos[2], 0.6])
self.setCameraSpotlight()
def setCameraSpotlight(self):
p = self.camera.camPos + 10 * self.camera.lookDir
fp = [p[0], p[1], p[2], 1]
glLightfv(GL_LIGHT1, GL_POSITION, fp)
glLightfv(GL_LIGHT1, GL_SPOT_DIRECTION, self.camera.lookDir)
def triggerLightPosUpdate(self):
self.updateLightPos = True
def initCamera(self):
box_diag = pow(pow(self.system.box_l[0], 2) + pow(
self.system.box_l[1], 2) + pow(self.system.box_l[1], 2), 0.5)
bl = self.system.box_l[0]
bl2 = bl / 2.0
if self.specs['camera_position'] == 'auto':
cp = [bl * 1.3, bl * 1.3, bl * 2.5]
else:
cp = self.specs['camera_position']
box_center = np.array([bl2, bl2, bl2])
self.camera = Camera(camPos=np.array(cp), camRot=np.array(
self.specs['camera_rotation']), moveSpeed=0.5 * box_diag / 17.0, center=box_center, updateLights=self.triggerLightPosUpdate)
self.smooth_light_pos = np.copy(box_center)
self.smooth_light_posV = np.array([0.0, 0.0, 0.0])
self.particle_COM = np.copy(box_center)
self.setCameraSpotlight()
self.updateLightPos = True
def initOpenGL(self):
glutInit(self.specs['name'])
glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH)
glutInitWindowSize(self.specs['window_size'][
0], self.specs['window_size'][1])
glutCreateWindow(self.specs['name'])
glClearColor(self.specs['background_color'][0], self.specs[
'background_color'][1], self.specs['background_color'][2], 1.)
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA)
glEnable(GL_BLEND)
glEnable(GL_CULL_FACE)
glLineWidth(2.0)
glutIgnoreKeyRepeat(1)
# setup lighting
if self.specs['light_size'] == 'auto':
box_diag = pow(pow(self.system.box_l[0], 2) + pow(
self.system.box_l[1], 2) + pow(self.system.box_l[1], 2), 0.5)
self.specs['light_size'] = box_diag * 2.0
glEnable(GL_DEPTH_TEST)
glEnable(GL_LIGHTING)
# LIGHT0
if self.specs['light_pos'] != 'auto':
glLightfv(GL_LIGHT0, GL_POSITION, self.specs['light_pos'])
else:
glLightfv(GL_LIGHT0, GL_POSITION, self.system.box_l * 0.5)
glLightfv(GL_LIGHT0, GL_AMBIENT, self.specs['light_colors'][0])
glLightfv(GL_LIGHT0, GL_DIFFUSE, self.specs['light_colors'][1])
glLightfv(GL_LIGHT0, GL_SPECULAR, self.specs['light_colors'][2])
glLightf(GL_LIGHT0, GL_CONSTANT_ATTENUATION,
1.0 / self.specs['light_brightness'])
glLightf(GL_LIGHT0, GL_LINEAR_ATTENUATION,
1.0 / self.specs['light_size'])
glEnable(GL_LIGHT0)
# LIGHT1: SPOTLIGHT ON CAMERA IN LOOK DIRECTION
if self.specs['spotlight_enabled']:
glLightfv(GL_LIGHT1, GL_POSITION, [0, 0, 0, 1])
glLightfv(GL_LIGHT1, GL_AMBIENT, self.specs['spotlight_colors'][0])
glLightfv(GL_LIGHT1, GL_DIFFUSE, self.specs['spotlight_colors'][1])
glLightfv(GL_LIGHT1, GL_SPECULAR,
self.specs['spotlight_colors'][2])
glLightf(GL_LIGHT1, GL_SPOT_CUTOFF, self.specs['spotlight_angle'])
glLightfv(GL_LIGHT1, GL_SPOT_DIRECTION, [1.0, 1.0, 1.0])
glLightf(GL_LIGHT1, GL_SPOT_EXPONENT,
self.specs['spotlight_focus'])
glLightf(GL_LIGHT1, GL_CONSTANT_ATTENUATION,
1.0 / self.specs['spotlight_brightness'])
glLightf(GL_LIGHT1, GL_LINEAR_ATTENUATION, 0.0)
glLightf(GL_LIGHT1, GL_QUADRATIC_ATTENUATION, 0.0)
glEnable(GL_LIGHT1)
# END OF MAIN CLASS
# OPENGL DRAW WRAPPERS
def setSolidMaterial(r, g, b, a=1.0, ambient=0.6, diffuse=1.0, specular=0.1):
glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, [
ambient * r, ambient * g, ambient * g, a])
glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, [
diffuse * r, diffuse * g, diffuse * b, a])
glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, [
specular * r, specular * g, specular * g, a])
glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, 50)
def setOutlineMaterial(r, g, b, a=1.0):
glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, [r, g, b, a])
glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, [0, 0, 0, a])
glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, [0, 0, 0, a])
glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, 100)
def drawBox(p0, s, color):
setSolidMaterial(color[0], color[1], color[2], 1, 2, 1)
glPushMatrix()
glTranslatef(p0[0], p0[1], p0[2])
glBegin(GL_LINE_LOOP)
glVertex3f(0.0, 0.0, 0.0)
glVertex3f(s[0], 0.0, 0.0)
glVertex3f(s[0], s[1], 0.0)
glVertex3f(0, s[1], 0.0)
glEnd()
glBegin(GL_LINE_LOOP)
glVertex3f(0.0, 0.0, s[2])
glVertex3f(s[0], 0.0, s[2])
glVertex3f(s[0], s[1], s[2])
glVertex3f(0, s[1], s[2])
glEnd()
glBegin(GL_LINES)
glVertex3f(0.0, 0.0, 0.0)
glVertex3f(0.0, 0.0, s[2])
glVertex3f(s[0], 0.0, 0.0)
glVertex3f(s[0], 0.0, s[2])
glVertex3f(s[0], s[1], 0.0)
glVertex3f(s[0], s[1], s[2])
glVertex3f(0.0, s[1], 0.0)
glVertex3f(0.0, s[1], s[2])
glEnd()
# glutWireCube(size)
glPopMatrix()
def drawSphere(pos, radius, color, material, quality):
glPushMatrix()
glTranslatef(pos[0], pos[1], pos[2])
setSolidMaterial(color[0], color[1], color[2], color[
3], material[0], material[1], material[2])
glutSolidSphere(radius, quality, quality)
glPopMatrix()
def redrawSphere(pos, radius, quality):
glPushMatrix()
glTranslatef(pos[0], pos[1], pos[2])
glutSolidSphere(radius, quality, quality)
glPopMatrix()
def drawPlane(edges, color, material):
setSolidMaterial(color[0], color[1], color[2], color[
3], material[0], material[1], material[2])
glBegin(GL_QUADS)
for e in edges:
glVertex3f(e[0], e[1], e[2])
glEnd()
def drawCube(pos, size, color, alpha):
setSolidMaterial(color[0], color[1], color[2], alpha)
glPushMatrix()
glTranslatef(pos[0], pos[1], pos[2])
glutSolidCube(size)
glPopMatrix()
def calcAngle(d):
z = np.array([0, 0, 1])
l = np.linalg.norm(d)
dot_z = np.dot(z, d)
t = np.cross(z, d)
return 180.0 / pi * acos(dot_z / l), t, l
def drawTriangles(triangles, color, material):
np.random.seed(1)
glBegin(GL_TRIANGLES)
for t in triangles:
color = np.random.random(3).tolist()
color.append(1)
setSolidMaterial(color[0], color[1], color[2],
color[3], material[0], material[1], material[2])
for p in t:
glVertex3f(p[0], p[1], p[2])
glEnd()
def drawPoints(points, pointsize, color, material):
setSolidMaterial(color[0], color[1], color[2], color[3],
material[0], material[1], material[2])
glEnable(GL_POINT_SMOOTH)
glPointSize(pointsize)
glBegin(GL_POINTS)
for p in points:
glVertex3f(p[0], p[1], p[2])
glEnd()
def drawCylinder(posA, posB, radius, color, material, quality, draw_caps=False):
setSolidMaterial(color[0], color[1], color[2], color[3],
material[0], material[1], material[2])
glPushMatrix()
quadric = gluNewQuadric()
d = posB - posA
if d[2] == 0.0:
d[2] = 0.0001
v = np.linalg.norm(d)
if v == 0:
ax = 57.2957795
else:
ax = 57.2957795 * acos(d[2] / v)