def load_scene(root, fov):
ROOT = root
f = json.load(open(ROOT + 'scene.json'))
bsdfs = f['bsdfs']
materials = {}
for bsdf in bsdfs:
name = bsdf['name']
print name
material = tc.create_surface_material('diffusive')
params = {}
albedo = bsdf['albedo']
if isinstance(albedo, float):
params['diffuse'] = (albedo, albedo, albedo)
elif isinstance(albedo, list):
params['diffuse'] = tuple(albedo)
else:
tex = Texture('image', filename=ROOT + albedo)
params['diffuse_map'] = tex.id
material.initialize(P(**params))
materials[name] = material
meshes = []
for mesh_node in f['primitives']:
if 'file' in mesh_node:
# Object
mesh = tc.create_mesh()
fn = ROOT + mesh_node['file'][:-4] + '.obj'
mesh.initialize(P(filename=fn))
mesh.set_material(materials[mesh_node['bsdf']])
else:
# Light source
mesh = tc.create_mesh()
mesh.initialize(P(filename='../assets/meshes/plane.obj'))
material = tc.create_surface_material('emissive')
e = 1
material.initialize(P(color=(e, e, e)))
mesh.set_material(material)
if 'transform' in mesh_node:
trans = mesh_node['transform']
if 'position' in trans:
mesh.translate(Vector(*trans['position']))
if 'rotation' in trans:
mesh.rotate_euler(Vector(*trans['rotation']))
meshes.append(mesh)
camera_node = f['camera']
width, height = camera_node['resolution']
# the FOV value is ?
#fov = math.degrees(math.atan(27.2 / camera_node['fov']) * 2)
camera = Camera('perspective',
aspect_ratio=float(width) / height,
fov_angle=fov,
origin=tuple(camera_node['transform']['position']),
look_at=tuple(camera_node['transform']['look_at']),
up=tuple(camera_node['transform']['up']))
return (width, height), meshes, camera
