def OnInit(self):
"""Load the image on initial load of the application"""
print """Should see two geodesic spheres over black background
Sphere to left should be lit with normal-per-face,
giving each face a hard-line edge with adjacent faces.
Sphere to the right should be lit with normal-per-vertex
which should make the lines between faces fuzzier."""
points, indices = loadData(ICOSDATA)
## light = basenodes.PointLight(
## location = (2,10,10)
## )
self.sg = basenodes.sceneGraph(
## lights = [
## light
## ],
children=[
## light,
basenodes.Transform(
translation=(-1.5, 0, 0),
children=[
basenodes.Shape(
appearance=basenodes.Appearance(
material=basenodes.Material(diffuseColor=(1, 0,
0))),
geometry=basenodes.IndexedFaceSet(
coord=basenodes.Coordinate(point=points, ),
coordIndex=indices,
),
),
],
),
basenodes.Transform(
translation=(1.5, 0, 0),
children=[
basenodes.Shape(
appearance=basenodes.Appearance(
material=basenodes.Material(diffuseColor=(1, 0,
0))),
geometry=basenodes.IndexedFaceSet(
coord=basenodes.Coordinate(point=points, ),
coordIndex=indices,
creaseAngle=3.14,
normalPerVertex=1,
),
),
],
),
])
def OnInit(self):
"""Load the image on initial load of the application"""
print("""Should see 6-sided polygon with normal-per-vertex smoothing
This polygon is produced using the GLU tesselator
from a simple linear progression of indices across
the 6 points of the polygon.""")
points, indices = loadData(TESTDATA)
self.sg = basenodes.sceneGraph(children=[
basenodes.Transform(children=[
basenodes.Shape(
appearance=basenodes.Appearance(
material=basenodes.Material(diffuseColor=(1, 0, 0))),
geometry=basenodes.IndexedFaceSet(
coord=basenodes.Coordinate(point=points, ),
coordIndex=indices,
creaseAngle=3.14,
normalPerVertex=1,
),
),
], ),
])
def parse( self, data, baseURL, *args, **named ):
"""Parse the loaded data (with the provided meta-information)
This implementation simply creates VRML97 scenegraph nodes out
of the .obj format data.
"""
sg = basenodes.sceneGraph(
)
# these three are shared among all shapes
hash = md5( baseURL ).hexdigest()
coord = basenodes.Coordinate( DEF='Coord-%s'%(hash,) )
normal = basenodes.Normal(DEF='Norm-%s'%(hash,))
texCoord = basenodes.TextureCoordinate(DEF='TexCoord-%s'%(hash,))
mesh = None # transforms
group = None # shape
material = None # appearance, material, texture
materials = {}
# indices are 1-based, the first values are never used...
vertices = [[0., 0., 0.]]
normals = [[0., 0., 0.]]
tex_coords = [[0., 0.]]
current_vertex_indices = []
current_normal_indices = []
current_texcoord_indices = []
for line in data.splitlines():
if line.startswith('#'):
continue
values = line.split()
if not values:
continue
if values[0] == 'v':
vertices.append(map(float, values[1:4]))
elif values[0] == 'vn':
normals.append(map(float, values[1:4]))
elif values[0] == 'vt':
tex_coords.append(map(float, values[1:3]))
elif values[0] == 'mtllib':
self.load_material_library(values[1], materials, baseURL)
elif values[0] in ('usemtl', 'usemat'):
material = materials.get(values[1], None)
if material is None:
log.warn('Unknown material: %s', values[1])
material = self.defaultMaterial()
if mesh is not None:
if group and current_vertex_indices:
group.geometry.coordIndex = current_vertex_indices
group.geometry.texCoordIndex = current_texcoord_indices
group.geometry.normalIndex = current_normal_indices
current_vertex_indices = []
current_texcoord_indices = []
current_normal_indices = []
group = basenodes.Shape(
geometry = basenodes.IndexedFaceSet(
coord = coord,
normal = normal,
texCoord = texCoord,
solid=False,
),
appearance = material,
)
mesh.children.append(group)
elif values[0] == 'o':
mesh = basenodes.Transform( DEF = values[1] )
sg.children.append( mesh )
sg.regDefName( values[1], mesh )
# previous shape is no longer current...
group = None
elif values[0] == 's':
# a smoothing-group definition...
# not currently supported...
pass
elif values[0] == 'f':
# adds a single face
if mesh is None:
# anonymous transform
mesh = basenodes.Transform()
sg.children.append(mesh)
if material is None:
material = self.defaultMaterial()
if group is None:
group = basenodes.Shape(
geometry = basenodes.IndexedFaceSet(
coord = coord,
normal = normal,
texCoord = texCoord,
solid=False,
),
appearance = material,
)
mesh.children.append(group)
for i, v in enumerate(values[1:]):
v_index, t_index, n_index = self._cleanIndex( v )
current_vertex_indices.append( v_index )
current_texcoord_indices.append( t_index )
current_normal_indices.append( n_index )
current_vertex_indices.append( -1 )
current_texcoord_indices.append( -1 )
current_normal_indices.append( -1 )
else:
log.warn( """Unrecognized operation: %r""", values )
if group and current_vertex_indices:
group.geometry.coordIndex = current_vertex_indices
group.geometry.texCoordIndex = current_texcoord_indices
group.geometry.normalIndex = current_normal_indices
coord.point = vertices
normal.normal = normals
texCoord.texCoord = tex_coords
return True,sg