def add_camera_animation(op, cameras, parent_collection,
number_interpolation_frames, interpolation_type,
consider_missing_cameras_during_animation,
remove_rotation_discontinuities, image_dp,
image_fp_type):
op.report({'INFO'}, 'Adding Camera Animation: ...')
if len(cameras) == 0:
return
if consider_missing_cameras_during_animation:
cameras = enhance_cameras_with_dummy_cameras(op, cameras, image_dp,
image_fp_type)
# Using the first reconstructed camera as template for the animated camera. The values
# are adjusted with add_transformation_animation() and add_camera_intrinsics_animation().
some_cam = cameras[0]
bcamera = add_single_camera(op, "Animated Camera", some_cam)
cam_obj = add_obj(bcamera, "Animated Camera", parent_collection)
cameras_sorted = sorted(cameras,
key=lambda camera: camera.get_relative_fp())
transformations_sorted = []
camera_intrinsics_sorted = []
for camera in cameras_sorted:
if isinstance(camera, DummyCamera):
matrix_world = None
camera_intrinsics = None
else:
matrix_world = compute_camera_matrix_world(camera)
shift_x, shift_y = compute_shift(camera,
relativ_to_largest_extend=True)
camera_intrinsics = CameraIntrinsics(camera.get_field_of_view(),
shift_x, shift_y)
transformations_sorted.append(matrix_world)
camera_intrinsics_sorted.append(camera_intrinsics)
add_transformation_animation(
op=op,
animated_obj_name=cam_obj.name,
transformations_sorted=transformations_sorted,
number_interpolation_frames=number_interpolation_frames,
interpolation_type=interpolation_type,
remove_rotation_discontinuities=remove_rotation_discontinuities)
add_camera_intrinsics_animation(
op=op,
animated_obj_name=cam_obj.name,
intrinsics_sorted=camera_intrinsics_sorted,
number_interpolation_frames=number_interpolation_frames)
def add_points_as_mesh(op, points, reconstruction_collection):
op.report({'INFO'}, 'Adding Points as Mesh: ...')
stop_watch = StopWatch()
point_cloud_obj_name = "Mesh Point Cloud"
point_cloud_mesh = bpy.data.meshes.new(point_cloud_obj_name)
point_cloud_mesh.update()
point_cloud_mesh.validate()
point_world_coordinates = [tuple(point.coord) for point in points]
point_cloud_mesh.from_pydata(point_world_coordinates, [], [])
point_cloud_obj = add_obj(point_cloud_mesh, point_cloud_obj_name,
reconstruction_collection)
op.report({'INFO'}, 'Duration: ' + str(stop_watch.get_elapsed_time()))
op.report({'INFO'}, 'Adding Points as Mesh: Done')
return point_cloud_obj.name
def add_camera_image_plane(matrix_world, blender_image, camera, name,
transparency, add_image_plane_emission,
image_planes_collection, op):
"""
Create mesh for image plane
"""
# op.report({'INFO'}, 'add_camera_image_plane: ...')
# op.report({'INFO'}, 'name: ' + str(name))
width = camera.width
height = camera.height
focal_length = camera.get_focal_length()
p_x, p_y = camera.get_principal_point()
assert width is not None and height is not None
bpy.context.scene.render.engine = 'CYCLES'
mesh = bpy.data.meshes.new(name)
mesh.update()
mesh.validate()
plane_distance = 1.0 # Distance from camera position
# Right vector in view frustum at plane_distance:
right = Vector((1, 0, 0)) * (width / focal_length) * plane_distance
# Up vector in view frustum at plane_distance:
up = Vector((0, 1, 0)) * (height / focal_length) * plane_distance
# Camera view direction:
view_dir = -Vector((0, 0, 1)) * plane_distance
plane_center = view_dir
shift_x, shift_y = compute_shift(camera, relativ_to_largest_extend=False)
corners = ((-0.5, -0.5), (+0.5, -0.5), (+0.5, +0.5), (-0.5, +0.5))
points = [
(plane_center + (c[0] + shift_x) * right + (c[1] + shift_y) * up)[0:3]
for c in corners
]
mesh.from_pydata(points, [], [[0, 1, 2, 3]])
mesh.uv_layers.new()
# Add mesh to new image plane object:
mesh_obj = add_obj(mesh, name, image_planes_collection)
image_plane_material = bpy.data.materials.new(name="image_plane_material")
# Adds "Principled BSDF" and a "Material Output" node
image_plane_material.use_nodes = True
nodes = image_plane_material.node_tree.nodes
links = image_plane_material.node_tree.links
shader_node_tex_image = nodes.new(type='ShaderNodeTexImage')
shader_node_principled_bsdf = nodes.get('Principled BSDF')
shader_node_principled_bsdf.inputs['Alpha'].default_value = transparency
links.new(shader_node_tex_image.outputs['Color'],
shader_node_principled_bsdf.inputs['Base Color'])
if add_image_plane_emission:
links.new(shader_node_tex_image.outputs['Color'],
shader_node_principled_bsdf.inputs['Emission'])
shader_node_tex_image.image = blender_image
# Assign it to object
if mesh_obj.data.materials:
# assign to 1st material slot
mesh_obj.data.materials[0] = image_plane_material
else:
# no slots
mesh_obj.data.materials.append(image_plane_material)
mesh_obj.matrix_world = matrix_world
mesh.update()
mesh.validate()
# op.report({'INFO'}, 'add_camera_image_plane: Done')
return mesh_obj
def add_cameras(op,
cameras,
parent_collection,
image_dp=None,
add_background_images=False,
add_image_planes=False,
convert_camera_coordinate_system=True,
camera_collection_name='Cameras',
image_plane_collection_name='Image Planes',
camera_scale=1.0,
image_plane_transparency=0.5,
add_image_plane_emission=True):
"""
======== The images are currently only shown in BLENDER RENDER ========
======== Make sure to enable TEXTURE SHADING in the 3D view to make the images visible ========
:param cameras:
:param image_dp:
:param add_image_planes:
:param convert_camera_coordinate_system:
:param camera_collection_name:
:param image_plane_collection_name:
:return:
"""
op.report({'INFO'}, 'Adding Cameras: ...')
stop_watch = StopWatch()
camera_collection = add_collection(camera_collection_name,
parent_collection)
if add_image_planes:
op.report({'INFO'}, 'Adding image planes: True')
image_planes_collection = add_collection(image_plane_collection_name,
parent_collection)
camera_image_plane_pair_collection = add_collection(
"Camera Image Plane Pair Collection", parent_collection)
else:
op.report({'INFO'}, 'Adding image planes: False')
# Adding cameras and image planes:
for index, camera in enumerate(cameras):
# camera_name = "Camera %d" % index # original code
# Replace the camera name so it matches the image name (without extension)
blender_image_name_stem = camera.get_blender_obj_gui_str()
camera_name = blender_image_name_stem + '_cam'
bcamera = add_single_camera(op, camera_name, camera)
camera_object = add_obj(bcamera, camera_name, camera_collection)
matrix_world = compute_camera_matrix_world(camera)
camera_object.matrix_world = matrix_world
camera_object.scale *= camera_scale
if not add_image_planes and not add_background_images:
continue
if camera.has_undistorted_absolute_fp():
path_to_image = camera.get_undistored_absolute_fp()
else:
path_to_image = camera.get_absolute_fp()
if not os.path.isfile(path_to_image):
continue
blender_image = bpy.data.images.load(path_to_image)
if add_background_images:
# op.report({'INFO'}, 'Adding background image for: ' + camera_name)
camera_data = bpy.data.objects[camera_name].data
camera_data.show_background_images = True
background_image = camera_data.background_images.new()
background_image.image = blender_image
if add_image_planes and not camera.is_panoramic():
# op.report({'INFO'}, 'Adding image plane for: ' + camera_name)
# Group image plane and camera:
camera_image_plane_pair_collection_current = add_collection(
"Camera Image Plane Pair Collection %s" %
blender_image_name_stem, camera_image_plane_pair_collection)
image_plane_name = blender_image_name_stem + '_image_plane'
# do not add image planes by default, this is slow !
image_plane_obj = add_camera_image_plane(
matrix_world,
blender_image,
camera=camera,
name=image_plane_name,
transparency=image_plane_transparency,
add_image_plane_emission=add_image_plane_emission,
image_planes_collection=image_planes_collection,
op=op)
camera_image_plane_pair_collection_current.objects.link(
camera_object)
camera_image_plane_pair_collection_current.objects.link(
image_plane_obj)
op.report({'INFO'}, 'Duration: ' + str(stop_watch.get_elapsed_time()))
op.report({'INFO'}, 'Adding Cameras: Done')
def add_points_as_mesh(op,
points,
add_points_as_particle_system,
mesh_type,
point_extent,
add_particle_color_emission,
reconstruction_collection,
set_particle_color_flag,
particle_overwrite_color=None):
op.report({'INFO'}, 'Adding Points: ...')
stop_watch = StopWatch()
particle_obj_name = "Particle Shape"
point_cloud_obj_name = "Point Cloud"
point_cloud_mesh = bpy.data.meshes.new(point_cloud_obj_name)
point_cloud_mesh.update()
point_cloud_mesh.validate()
point_world_coordinates = [tuple(point.coord) for point in points]
point_cloud_mesh.from_pydata(point_world_coordinates, [], [])
point_cloud_obj = add_obj(point_cloud_mesh, point_cloud_obj_name,
reconstruction_collection)
if add_points_as_particle_system:
op.report({'INFO'},
'Representing Points in the Point Cloud with Meshes: True')
op.report({'INFO'}, 'Mesh Type: ' + str(mesh_type))
# The default size of elements added with
# primitive_cube_add, primitive_uv_sphere_add, etc. is (2,2,2)
point_scale = point_extent * 0.5
bpy.ops.object.select_all(action='DESELECT')
if mesh_type == "PLANE":
bpy.ops.mesh.primitive_plane_add(size=point_scale)
elif mesh_type == "CUBE":
bpy.ops.mesh.primitive_cube_add(size=point_scale)
elif mesh_type == "SPHERE":
bpy.ops.mesh.primitive_uv_sphere_add(radius=point_scale)
else:
bpy.ops.mesh.primitive_uv_sphere_add(radius=point_scale)
particle_obj = bpy.context.object
particle_obj.name = particle_obj_name
reconstruction_collection.objects.link(particle_obj)
bpy.context.collection.objects.unlink(particle_obj)
material_name = "PointCloudMaterial"
material = bpy.data.materials.new(name=material_name)
particle_obj.data.materials.append(material)
# enable cycles, otherwise the material has no nodes
bpy.context.scene.render.engine = 'CYCLES'
material.use_nodes = True
node_tree = material.node_tree
# Print all available nodes with:
# bpy.data.materials['material_name'].node_tree.nodes.keys()
if 'Material Output' in node_tree.nodes: # is created by default
material_output_node = node_tree.nodes['Material Output']
else:
material_output_node = node_tree.nodes.new(
'ShaderNodeOutputMaterial')
if 'Principled BSDF' in node_tree.nodes: # is created by default
principled_bsdf_node = node_tree.nodes['Principled BSDF']
else:
principled_bsdf_node = node_tree.nodes.new(
"ShaderNodeBsdfPrincipled")
node_tree.links.new(principled_bsdf_node.outputs['BSDF'],
material_output_node.inputs['Surface'])
assert len(point_world_coordinates) == len(points)
particle_color_node = create_particle_color_nodes(
node_tree, points, set_particle_color_flag,
particle_overwrite_color)
# Add links for base color and emission to improve color visibility
node_tree.links.new(particle_color_node.outputs['Color'],
principled_bsdf_node.inputs['Base Color'])
if add_particle_color_emission:
node_tree.links.new(particle_color_node.outputs['Color'],
principled_bsdf_node.inputs['Emission'])
if len(point_cloud_obj.particle_systems) == 0:
point_cloud_obj.modifiers.new("particle sys",
type='PARTICLE_SYSTEM')
particle_sys = point_cloud_obj.particle_systems[0]
settings = particle_sys.settings
settings.type = 'HAIR'
settings.use_advanced_hair = True
settings.emit_from = 'VERT'
settings.count = len(points)
# The final object extent is hair_length * obj.scale
settings.hair_length = 100 # This must not be 0
settings.use_emit_random = False
settings.render_type = 'OBJECT'
settings.instance_object = particle_obj
bpy.context.view_layer.update()
else:
op.report({'INFO'},
'Representing Points in the Point Cloud with Meshes: False')
op.report({'INFO'}, 'Duration: ' + str(stop_watch.get_elapsed_time()))
op.report({'INFO'}, 'Adding Points: Done')
return point_cloud_obj.name
