bindings/python/dionysus/viewer/complex3d.py
 author Dmitriy Morozov Sun, 24 Nov 2019 13:35:45 -0800 changeset 298 02e680f6d987 parent 269 86a02dac0db2 permissions -rw-r--r--
```
from    PyQt4       import QtGui, QtCore
from    PyGLWidget  import PyGLWidget
from    OpenGL.GL   import *
from    dionysus    import Simplex
from    math        import sqrt

class ComplexViewer3D(PyGLWidget):
def __init__(self, points, complex = None, values = None, subcomplex = None, point_size = 3.):
self.display_list = None
PyGLWidget.__init__(self)

#glEnable( GL_BLEND )
#glEnable( GL_LINE_SMOOTH )
#glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA)

self.point_size = point_size
self.points = points
if complex:
self.complex = [s for s in complex]
else:
# Create vertex simplices if no complex provided
self.complex = [Simplex([i]) for i in xrange(len(self.points))]

if subcomplex:
self.subcomplex = subcomplex
else:
self.subcomplex = []

self.values = values
if not values:
self.values = [0]*len(self.points)
self.maxval, self.minval = max(self.values), min(self.values)

self.set_center(center)

self.make_display_list()

c = [0,0,0]
for p in self.points:
for i in xrange(3): c[i] += p[i]
for i in xrange(3): c[i] /= len(self.points)

r = 0
for p in self.points:
d = sqrt((p[0] - c[0])**2 + (p[1] - c[1])**2 + (p[2] - c[2])**2)
if d > r: r = d
return c,r

def paintGL(self):
PyGLWidget.paintGL(self)
if self.display_list:
glCallList(self.display_list)

def make_display_list(self):
self.display_list = glGenLists(1)
glNewList(self.display_list, GL_COMPILE)
self.draw_complex(self.complex,    self.point_size,   2., self.colormap)
self.draw_complex(self.subcomplex, 2*self.point_size, 4., colormap = lambda v: (0,1.,0), line_color = (0,1.,0))
glEndList()

def draw_complex(self, complex, point_size, line_size, colormap, line_color = (0,0,1.)):
glPointSize(point_size)
glLineWidth(line_size)
complex.sort(lambda s1, s2: -cmp(s1.dimension(), s2.dimension()))
for s in complex:
vertices = [v for v in s.vertices]
if s.dimension() == 0:              # point
p = self.points[vertices[0]]
v = self.values[vertices[0]]

c = self.colormap(v)
glColor3f(*c)
glBegin(GL_POINTS)
glVertex3f(p[0],p[1],p[2])
glEnd()
if s.dimension() == 1:            # edge
p0 = self.points[vertices[0]]
p1 = self.points[vertices[1]]

glColor3f(*line_color)
glBegin(GL_LINES)
glVertex3f(p0[0],p0[1],p0[2])
glVertex3f(p1[0],p1[1],p1[2])
glEnd()
elif s.dimension() == 2:
p0 = self.points[vertices[0]]
p1 = self.points[vertices[1]]
p2 = self.points[vertices[2]]

glColor3f(1,1,0)
glBegin(GL_TRIANGLES)
glVertex3f(p0[0],p0[1],p0[2])
glVertex3f(p1[0],p1[1],p1[2])
glVertex3f(p2[0],p2[1],p2[2])
glEnd()

def colormap(self, v):
if self.maxval <= self.minval:
t = 0
else:
t = (v - self.minval)/(self.maxval - self.minval)
c = QtGui.QColor()
c.setHsv(int(t*255), 255, 255)
cr = float(c.red())/255
cg = float(c.green())/255
cb = float(c.blue())/255
return (cr,cg,cb)

def show_complex_3D(points, complex = None, values = None, subcomplex = None, app = None, point_size = 3.):
#app = QtGui.QApplication([])
view = ComplexViewer3D(points, complex, values, subcomplex, point_size)
view.show()
view.raise_()
app.exec_()
```