def _set_raster_pos(x, y): # staticmethod
"""
"""
# If x or y is exactly 0, then numerical roundoff errors can make the raster position invalid.
# Using 0.1 instead apparently fixes it, and causes no noticable image quality effect.
# (Presumably they get rounded to integer window positions after the view volume clipping,
# though some effects I saw implied that they don't get rounded, so maybe 0.1 is close enough to 0.0.)
# This only matters when GLPane size is 100x100 or less,
# or when drawing this in lower left corner for debugging,
# so we don't have to worry about whether it's perfect.
# (The known perfect fix is to initialize both matrices, but we don't want to bother,
# or to worry about exceeding the projection matrix stack depth.)
x1 = max(x, 0.1)
y1 = max(y, 0.1)
depth = 0.1 # this should not matter, as long as it's within the viewing volume
x1, y1, z1 = gluUnProject(x1, y1, depth)
glRasterPos3f(
x1, y1, z1
) # z1 does matter (when in perspective view), since this is a 3d position
# Note: using glWindowPos would be simpler and better, but it's not defined
# by the PyOpenGL I'm using. [bruce iMac G5 070626]
### UPDATE [bruce 081203]: glWindowPos2i *is* defined, at least on my newer Mac.
# There are lots of variants, all suffix-typed with [23][dfis]{,v}.
# I need to check whether it's defined on the older Macs too, then use it here. ####FIX
if not glGetBooleanv(GL_CURRENT_RASTER_POSITION_VALID):
# This was happening when we used x, y = exact 0,
# and was causing the image to not get drawn sometimes (when mousewheel zoom was used).
# It can still happen for extreme values of mousewheel zoom (close to the ones
# which cause OpenGL exceptions), mostly only when pos = (0, 0) but not entirely.
# Sometimes the actual drawing positions can get messed up then, too.
# This doesn't matter much, but indicates that re-initing the matrices would be
# a better solution if we could be sure the projection stack depth was sufficient
# (or if we reset the standard projection when done, rather than using push/pop).
print "bug: not glGetBooleanv(GL_CURRENT_RASTER_POSITION_VALID); pos =", x, y
# if this happens, the subsequent effect is that glDrawPixels draws nothing
else:
# verify correct raster position
px, py, pz, pw = glGetFloatv(GL_CURRENT_RASTER_POSITION)
if not (0 <= px - x < 0.4) and (0 <= py - y <
0.4): # change to -0.4 < px - x ??
print "LIKELY BUG: glGetFloatv(GL_CURRENT_RASTER_POSITION) = %s" % [
px, py, pz, pw
]
# seems to be in window coord space, but with float values,
# roughly [0.1, 0.1, 0.1, 1.0] but depends on viewpoint, error about 10**-5
pass
return
def _set_raster_pos(x, y): # staticmethod
"""
"""
# If x or y is exactly 0, then numerical roundoff errors can make the raster position invalid.
# Using 0.1 instead apparently fixes it, and causes no noticable image quality effect.
# (Presumably they get rounded to integer window positions after the view volume clipping,
# though some effects I saw implied that they don't get rounded, so maybe 0.1 is close enough to 0.0.)
# This only matters when GLPane size is 100x100 or less,
# or when drawing this in lower left corner for debugging,
# so we don't have to worry about whether it's perfect.
# (The known perfect fix is to initialize both matrices, but we don't want to bother,
# or to worry about exceeding the projection matrix stack depth.)
x1 = max(x, 0.1)
y1 = max(y, 0.1)
depth = 0.1 # this should not matter, as long as it's within the viewing volume
x1, y1, z1 = gluUnProject(x1, y1, depth)
glRasterPos3f(x1, y1, z1) # z1 does matter (when in perspective view), since this is a 3d position
# Note: using glWindowPos would be simpler and better, but it's not defined
# by the PyOpenGL I'm using. [bruce iMac G5 070626]
### UPDATE [bruce 081203]: glWindowPos2i *is* defined, at least on my newer Mac.
# There are lots of variants, all suffix-typed with [23][dfis]{,v}.
# I need to check whether it's defined on the older Macs too, then use it here. ####FIX
if not glGetBooleanv(GL_CURRENT_RASTER_POSITION_VALID):
# This was happening when we used x, y = exact 0,
# and was causing the image to not get drawn sometimes (when mousewheel zoom was used).
# It can still happen for extreme values of mousewheel zoom (close to the ones
# which cause OpenGL exceptions), mostly only when pos = (0, 0) but not entirely.
# Sometimes the actual drawing positions can get messed up then, too.
# This doesn't matter much, but indicates that re-initing the matrices would be
# a better solution if we could be sure the projection stack depth was sufficient
# (or if we reset the standard projection when done, rather than using push/pop).
print "bug: not glGetBooleanv(GL_CURRENT_RASTER_POSITION_VALID); pos =", x, y
# if this happens, the subsequent effect is that glDrawPixels draws nothing
else:
# verify correct raster position
px, py, pz, pw = glGetFloatv(GL_CURRENT_RASTER_POSITION)
if not (0 <= px - x < 0.4) and (0 <= py - y < 0.4): # change to -0.4 < px - x ??
print "LIKELY BUG: glGetFloatv(GL_CURRENT_RASTER_POSITION) = %s" % [px, py, pz, pw]
# seems to be in window coord space, but with float values,
# roughly [0.1, 0.1, 0.1, 1.0] but depends on viewpoint, error about 10**-5
pass
return
def draw(self,
camera_matrix: numpy.ndarray,
camera_position: PointCoordinatesAny = None):
"""
Draw the selection box
:param camera_matrix: 4x4 transformation matrix for the camera
:param camera_position: The position of the camera. Used to flip draw direction if camera inside box.
:return:
"""
self._setup()
if self._needs_rebuild:
self._create_geometry()
transformation_matrix = numpy.matmul(camera_matrix,
self.transformation_matrix)
depth_state = glGetBooleanv(GL_DEPTH_TEST)
cull_state = glGetIntegerv(GL_CULL_FACE_MODE)
# draw the lines around the boxes
self.draw_start = 0
self.draw_count = 36
if depth_state:
glDisable(GL_DEPTH_TEST)
self._draw_mode = GL_LINE_STRIP
super()._draw(transformation_matrix)
if depth_state:
glEnable(GL_DEPTH_TEST)
if camera_position is not None:
if camera_position in self:
glCullFace(GL_FRONT)
else:
glCullFace(GL_BACK)
self._draw_mode = GL_TRIANGLES
self.draw_start = 36
# 6 faces, 9 quads/face, 2 triangles/quad, 3 verts/triangle
self.draw_count = 324
super()._draw(transformation_matrix)
glCullFace(cull_state)
module_names = info.keys()
module_names.sort()
for module_name in module_names:
if module_name == 'OpenGL':
desc = 'General'
else:
desc = string.split(module_name, '.', 1)[1]
f.write('<table border="1" cellspacing="0" cellpadding="2"><thead><tr><h2>%s</h2></tr></thead>' % desc)
for i in info[module_name]:
try:
if len(i) == 2:
key, value = i
else:
key, id, t = i
if t[0] == 'b':
value = glGetBooleanv(id)
if operator.isSequence(value):
value = map(_boolean, value)
else:
value = _boolean(value)
elif t[0] == 'i':
value = glGetIntegerv(id)
elif t[0] == 'd':
value = glGetDoublev(id)
elif t[0] == 'e':
if len(t) > 1:
if t[1] == 'u':
x = gluGetString(id)
else:
x = glGetString(id)
else:
for module_name in module_names:
if module_name == 'OpenGL':
desc = 'General'
else:
desc = string.split(module_name, '.', 1)[1]
f.write(
'<table border="1" cellspacing="0" cellpadding="2"><thead><tr><h2>%s</h2></tr></thead>'
% desc)
for i in info[module_name]:
try:
if len(i) == 2:
key, value = i
else:
key, id, t = i
if t[0] == 'b':
value = glGetBooleanv(id)
if operator.isSequence(value):
value = map(_boolean, value)
else:
value = _boolean(value)
elif t[0] == 'i':
value = glGetIntegerv(id)
elif t[0] == 'd':
value = glGetDoublev(id)
elif t[0] == 'e':
if len(t) > 1:
if t[1] == 'u':
x = gluGetString(id)
else:
x = glGetString(id)
else: