AnyImage/tests/test_mesh_blender.py

import sys
from pathlib import Path
from types import SimpleNamespace
from unittest.mock import patch

import bpy
import numpy as np
from mathutils import Matrix, Vector

SOURCE_ROOT = Path(__file__).parents[1] / "src"
sys.path.insert(0, str(SOURCE_ROOT))

from anyimage.operators.common import material, node_graph
from anyimage.operators.cutout_tool import build_shapes as mesh
from anyimage.operators.cutout_tool import node_assets as cutout_nodes
from anyimage.operators.cutout_tool import shape_types as shapes
from anyimage.operators.convert_to_plane import nodes as plane_nodes
from anyimage.operators.convert_to_plane import build as plane_build
from anyimage.operators.common.normal_map import bake_tangent_normal_image


def _inputs(group):
    return [
        item.name
        for item in group.interface.items_tree
        if item.item_type == "SOCKET" and item.in_out == "INPUT"
    ]


def _group_node(group, node_tree):
    return next(
        node
        for node in node_tree.nodes
        if node.bl_idname == "ShaderNodeGroup" and node.node_tree == group
    )


def test_depth_surface_image_packs_metric_points_and_edge_validity():
    bpy.ops.wm.read_factory_settings(use_empty=True)
    source_image = bpy.data.images.new("Source.png", width=2, height=2)
    source = bpy.data.objects.new("Source", None)
    source.data = source_image
    points = np.arange(12, dtype=np.float32).reshape((2, 2, 3))
    depth = np.asarray(((1.0, 1.0), (1.0, 2.0)), dtype=np.float32)
    valid = np.asarray(((True, False), (True, True)))

    image = mesh._surface_depth_image(source, points, valid, depth)

    packed = np.empty(16, dtype=np.float32)
    image.pixels.foreach_get(packed)
    packed = np.flipud(packed.reshape((2, 2, 4)))
    assert np.array_equal(packed[:, :, :3], points)
    assert packed[0, 1, 3] == -1.0
    assert np.all(packed[valid, 3] >= 0.0)
    assert image.alpha_mode == "CHANNEL_PACKED"
    assert image.name == "Source_depth.exr"


def test_tangent_bake_changes_pixels_using_evaluated_mesh_tbn():
    bpy.ops.wm.read_factory_settings(use_empty=True)
    source = bpy.data.objects.new("Source", None)
    bpy.context.collection.objects.link(source)
    target_mesh = bpy.data.meshes.new("Target")
    target_mesh.from_pydata(
        ((0.0, 0.0, 0.0), (0.0, 1.0, 0.0), (0.0, 0.0, 1.0)),
        (),
        ((0, 1, 2),),
    )
    target_mesh.polygons[0].use_smooth = True
    mesh._assign_uv(
        target_mesh,
        np.asarray(((0.0, 0.0), (1.0, 0.0), (0.0, 1.0))),
    )
    target = bpy.data.objects.new("Target", target_mesh)
    bpy.context.collection.objects.link(target)
    target.matrix_world = Matrix.Rotation(np.radians(-90.0), 4, "Y")
    image = bpy.data.images.new("Object Normal", width=3, height=3, alpha=True)
    pixels = np.ones((3, 3, 4), dtype=np.float32)
    pixels[..., :3] = (1.0, 0.5, 0.5)
    image.pixels.foreach_set(pixels.ravel())

    bake_tangent_normal_image(bpy.context, source, target, image)

    baked = np.empty(3 * 3 * 4, dtype=np.float32)
    image.pixels.foreach_get(baked)
    baked = baked.reshape((3, 3, 4))
    assert not np.allclose(baked[0, 0, :3], pixels[0, 0, :3])


def test_cutout_modifier_wraps_four_menu_controlled_shape_groups():
    bpy.ops.wm.read_factory_settings(use_empty=True)

    plane = plane_nodes.plane_node_group("PLANE")
    depth_plane = plane_nodes.plane_node_group("DEPTH_PLANE")
    cutout = cutout_nodes.cutout_node_group("CUTOUT")
    assert plane.name == "O Mesh Plane"
    assert cutout.name == shapes.CUTOUT_NODE_GROUP_NAME
    assert all(
        cutout_nodes.cutout_node_group(shape) == cutout
        for shape in shapes.CUTOUT_SHAPES
    )
    assert _inputs(plane) == ["Geometry", "Subdivide", "Thickness", "Material"]
    assert _inputs(depth_plane) == [
        "Geometry",
        "Subdivide",
        "Thickness",
        "Depth Amount",
        "Depth Image",
        "Material",
    ]
    assert _inputs(cutout) == [
        "Geometry",
        "Shape",
        "Thickness",
        "Depth Scale",
        "Double Sided",
        "Smooth Iterations",
        "Cleanup",
        "Smooth",
        "Reference Depth",
        "Depth Direction",
        "Uniform Scale",
        "Depth Image",
    ]
    panels = [
        item for item in cutout.interface.items_tree if item.item_type == "PANEL"
    ]
    assert [panel.name for panel in panels] == ["Options", "Data"]
    assert [item.name for item in panels[0].interface_items] == [
        "Cleanup",
        "Smooth",
        "Reference Depth",
        "Depth Direction",
    ]
    assert [item.name for item in panels[1].interface_items] == [
        "Uniform Scale",
        "Depth Image",
    ]
    assert all(panel.default_closed for panel in panels)

    shape_socket = next(
        item
        for item in cutout.interface.items_tree
        if item.item_type == "SOCKET" and item.name == "Shape"
    )
    assert shape_socket.socket_type == "NodeSocketMenu"
    assert not shape_socket.menu_expanded
    menu_switch = next(
        node for node in cutout.nodes if node.bl_idname == "GeometryNodeMenuSwitch"
    )
    assert [item.name for item in menu_switch.enum_items] == list(
        shapes.CUTOUT_SHAPE_LABELS.values()
    )
    assert any(
        link.from_socket.name == "Shape"
        and link.to_node == menu_switch
        and link.to_socket.name == "Menu"
        for link in cutout.links
    )

    child_groups = {
        shape: bpy.data.node_groups[name]
        for shape, name in shapes.CUTOUT_NODE_GROUP_NAMES.items()
    }
    assert cutout.is_modifier
    assert all(not group.is_modifier for group in child_groups.values())
    child_nodes = {
        node.node_tree: node
        for node in cutout.nodes
        if node.bl_idname == "GeometryNodeGroup"
    }
    assert set(child_nodes) == set(child_groups.values())
    for shape, group in child_groups.items():
        label = shapes.CUTOUT_SHAPE_LABELS[shape]
        assert any(
            link.from_node == child_nodes[group]
            and link.to_node == menu_switch
            and link.to_socket.name == label
            for link in cutout.links
        )

    assert _inputs(child_groups["CUTOUT"]) == ["Geometry", "Thickness"]
    assert _inputs(child_groups["BALLOON"]) == ["Geometry", "Thickness"]
    assert _inputs(child_groups["DEPTH_BALLOON"]) == [
        "Geometry",
        "Thickness",
        "Depth Scale",
        "Double Sided",
        "Reference Depth",
        "Depth Direction",
        "Uniform Scale",
        "Depth Image",
    ]
    assert _inputs(child_groups["DEPTH_SURFACE"]) == [
        "Geometry",
        "Thickness",
        "Depth Scale",
        "Reference Depth",
        "Uniform Scale",
        "Depth Image",
    ]

    dependencies = {}
    for link in cutout.links:
        if link.from_node.bl_idname != "NodeGroupInput":
            continue
        if link.to_node.bl_idname != "GeometryNodeGroup":
            continue
        shape = next(
            shape
            for shape, group in child_groups.items()
            if group == link.to_node.node_tree
        )
        dependencies.setdefault(link.from_socket.name, set()).add(shape)
    assert dependencies == {
        "Thickness": set(shapes.CUTOUT_SHAPES),
        "Depth Scale": {"DEPTH_BALLOON", "DEPTH_SURFACE"},
        "Double Sided": {"DEPTH_BALLOON"},
        "Reference Depth": {"DEPTH_BALLOON", "DEPTH_SURFACE"},
        "Depth Direction": {"DEPTH_BALLOON"},
        "Uniform Scale": {"DEPTH_BALLOON", "DEPTH_SURFACE"},
        "Depth Image": {"DEPTH_BALLOON", "DEPTH_SURFACE"},
    }

    assert sum(
        node.bl_idname == "GeometryNodeInputMeshIsland" for node in cutout.nodes
    ) == 1
    assert not any(
        node.bl_idname == "GeometryNodeAttributeStatistic"
        for node in cutout.nodes
    )
    assert all(
        not any(
            node.bl_idname == "GeometryNodeInputMeshIsland"
            for node in group.nodes
        )
        for group in child_groups.values()
    )
    assert any(
        node.bl_idname == "GeometryNodeBlurAttribute" for node in cutout.nodes
    )
    assert all(
        not any(
            node.bl_idname == "GeometryNodeBlurAttribute" for node in group.nodes
        )
        for group in child_groups.values()
    )
    repeat_counts = {
        shape: sum(
            node.bl_idname == "GeometryNodeRepeatInput" for node in group.nodes
        )
        for shape, group in child_groups.items()
    }
    assert repeat_counts == {
        "CUTOUT": 1,
        "BALLOON": 0,
        "DEPTH_BALLOON": 0,
        "DEPTH_SURFACE": 1,
    }
    assert sum(
        node.bl_idname == "GeometryNodeRepeatInput" for node in cutout.nodes
    ) == 1

    smooth = next(
        item
        for item in cutout.interface.items_tree
        if item.item_type == "SOCKET" and item.name == "Smooth"
    )
    iterations = next(
        item
        for item in cutout.interface.items_tree
        if item.item_type == "SOCKET" and item.name == "Smooth Iterations"
    )
    cleanup = next(
        item
        for item in cutout.interface.items_tree
        if item.item_type == "SOCKET" and item.name == "Cleanup"
    )
    assert cleanup.default_value == 0.0
    assert cleanup.subtype == "NONE"
    assert smooth.default_value == 1.0
    assert smooth.subtype == "FACTOR"
    assert iterations.default_value == 0
    assert iterations.min_value == 0
    assert getattr(iterations.parent, "name", "") == ""
    thickness = next(
        item
        for item in cutout.interface.items_tree
        if item.item_type == "SOCKET" and item.name == "Thickness"
    )
    assert thickness.subtype == "NONE"
    assert thickness.default_value == 0.0

    for group in child_groups.values():
        extrudes = [
            node
            for node in group.nodes
            if node.bl_idname == "GeometryNodeExtrudeMesh"
        ]
        assert extrudes
        assert all(not node.inputs["Individual"].default_value for node in extrudes)
        assert all(
            node.inputs["Offset Scale"].default_value == 1.0
            for node in extrudes
        )
    for group in (
        child_groups["CUTOUT"],
        child_groups["DEPTH_SURFACE"],
        depth_plane,
    ):
        thickness = next(
            item
            for item in group.interface.items_tree
            if item.item_type == "SOCKET" and item.name == "Thickness"
        )
        assert thickness.subtype == "DISTANCE"
    for group in (
        child_groups["BALLOON"],
        child_groups["DEPTH_BALLOON"],
    ):
        thickness = next(
            item
            for item in group.interface.items_tree
            if item.item_type == "SOCKET" and item.name == "Thickness"
        )
        assert thickness.subtype == "NONE"
        assert thickness.default_value == 1.0

def test_image_layer_switches_between_tangent_and_object_space_normal():
    bpy.ops.wm.read_factory_settings(use_empty=True)

    assert material.IMAGE_MATERIAL_NODE_GROUP_NAME == "O Image Layer"
    group = material.material_node_group()
    normal = next(
        item
        for item in group.interface.items_tree
        if item.item_type == "SOCKET"
        and item.in_out == "INPUT"
        and item.name == "Normal"
    )
    assert tuple(normal.default_value) == (0.5, 0.5, 1.0, 1.0)
    bump_scale = next(
        item
        for item in group.interface.items_tree
        if item.item_type == "SOCKET"
        and item.in_out == "INPUT"
        and item.name == "Bump Scale"
    )
    assert bump_scale.default_value == 0.0
    normal_scale = next(
        item
        for item in group.interface.items_tree
        if item.item_type == "SOCKET"
        and item.in_out == "INPUT"
        and item.name == "Normal Scale"
    )
    assert normal_scale.default_value == 1.0
    object_space = next(
        item
        for item in group.interface.items_tree
        if item.item_type == "SOCKET"
        and item.in_out == "INPUT"
        and item.name == "Object Space"
    )
    assert object_space.default_value is False
    normal_maps = {
        node.space
        for node in group.nodes
        if node.bl_idname == "ShaderNodeNormalMap"
    }
    assert normal_maps == {"TANGENT", "OBJECT"}
    assert all(
        not node.label
        for node in group.nodes
        if node.bl_idname in {"ShaderNodeNormalMap", "ShaderNodeMix"}
    )

    color = bpy.data.images.new("Color", width=2, height=2)
    normal_image = bpy.data.images.new("Normal", width=2, height=2)
    object_material = material.create_material(
        "Object Normal",
        color,
        1.0,
        normal_image=normal_image,
        normal_space="OBJECT",
    )
    layer = _group_node(group, object_material.node_tree)
    assert layer.inputs["Object Space"].default_value is True

    tangent_material = material.create_material(
        "Tangent Normal",
        color,
        1.0,
        normal_image=normal_image,
    )
    layer = _group_node(group, tangent_material.node_tree)
    assert layer.inputs["Object Space"].default_value is False
    reused = material.material_node_group()
    assert {
        node.space
        for node in reused.nodes
        if node.bl_idname == "ShaderNodeNormalMap"
    } == {"TANGENT", "OBJECT"}


def test_build_plane_keeps_one_quad_and_generates_topology_in_geometry_nodes():
    bpy.ops.wm.read_factory_settings(use_empty=True)
    image = bpy.data.images.new("Source", width=4096, height=2048)
    source = bpy.data.objects.new("Source", None)
    source.empty_display_type = "IMAGE"
    source.data = image
    source.empty_display_size = 2.0
    bpy.context.collection.objects.link(source)
    material = bpy.data.materials.new("Source.material")

    result = plane_build.build_mesh_plane(
        bpy.context,
        source,
        2,
        material,
    )

    assert result["anyimage_mesh_shape"] == "PLANE"
    assert len(result.data.vertices) == 4
    assert len(result.data.polygons) == 1
    assert all(polygon.use_smooth for polygon in result.data.polygons)
    assert shapes.BALLOON_ATTRIBUTE_NAME not in result.data.attributes
    assert result.modifiers[0].node_group.name == "O Mesh Plane"
    evaluated = result.evaluated_get(bpy.context.evaluated_depsgraph_get())
    evaluated_mesh = evaluated.to_mesh()
    try:
        assert len(evaluated_mesh.polygons) > 0
    finally:
        evaluated.to_mesh_clear()


def test_balloon_build_starts_from_the_unified_single_sheet():
    bpy.ops.wm.read_factory_settings(use_empty=True)
    image = bpy.data.images.new("Balloon Sheet", width=64, height=64, alpha=True)
    source = bpy.data.objects.new("Balloon Sheet", None)
    source.empty_display_type = "IMAGE"
    source.data = image
    source.empty_display_size = 2.0
    bpy.context.collection.objects.link(source)
    balloon_material = bpy.data.materials.new("Balloon Sheet.material")

    result = mesh.build_cutout_object(
        bpy.context,
        source,
        "BALLOON",
        8,
        balloon_material,
        regions=((((0, 0), (64, 0), (64, 64), (0, 64)),),),
        image_size=(64, 64),
        keep_original=True,
    )

    assert all(abs(vertex.co.x) < 1e-8 for vertex in result.data.vertices)
    assert len(result.data.vertices) > 4
    assert len(result.data.polygons) > 1
    assert shapes.BALLOON_ATTRIBUTE_NAME in result.data.attributes
    profile_attribute = result.data.attributes[shapes.BALLOON_ATTRIBUTE_NAME]
    assert profile_attribute.data_type == "FLOAT"
    assert profile_attribute.domain == "POINT"
    profile = np.empty(len(result.data.vertices), dtype=np.float32)
    profile_attribute.data.foreach_get("value", profile)
    assert profile.min() == 0.0 and profile.max() > 0.0
    assert result.modifiers[0].node_group.name == shapes.CUTOUT_NODE_GROUP_NAME
    inward = result.matrix_world.to_3x3() @ Vector((1.0, 0.0, 0.0))
    assert np.allclose(tuple(inward), (0.0, 0.0, -1.0), atol=1e-6)


def test_teddy_preference_writes_the_shared_balloon_attribute():
    bpy.ops.wm.read_factory_settings(use_empty=True)
    image = bpy.data.images.new("Teddy Sheet", width=64, height=64, alpha=True)
    source = bpy.data.objects.new("Teddy Sheet", None)
    source.empty_display_type = "IMAGE"
    source.data = image
    source.empty_display_size = 2.0
    bpy.context.collection.objects.link(source)
    teddy_material = bpy.data.materials.new("Teddy Sheet.material")

    with patch.object(
        mesh,
        "addon_preferences",
        return_value=SimpleNamespace(balloon_profile_algorithm="TEDDY"),
    ):
        result = mesh.build_cutout_object(
            bpy.context,
            source,
            "CUTOUT",
            8,
            teddy_material,
            regions=((((0, 0), (64, 0), (64, 64), (0, 64)),),),
            image_size=(64, 64),
            keep_original=True,
        )

    attribute = result.data.attributes[shapes.BALLOON_ATTRIBUTE_NAME]
    profile = np.empty(len(result.data.vertices), dtype=np.float32)
    attribute.data.foreach_get("value", profile)
    assert profile.min() == 0.0 and profile.max() > 0.0


def test_depth_surface_object_normal_is_remapped_to_cutout_axes():
    bpy.ops.wm.read_factory_settings(use_empty=True)
    image = bpy.data.images.new(
        "Surface Normal",
        width=1,
        height=1,
        alpha=True,
        float_buffer=True,
    )
    image.pixels.foreach_set((0.5, 0.5, 1.0, 1.0))

    mesh._orient_cutout_object_normal(image)

    pixels = np.empty(4, dtype=np.float32)
    image.pixels.foreach_get(pixels)
    assert np.allclose(pixels, (0.0, 0.5, 0.5, 1.0), atol=1e-6)


def test_internal_depth_plane_image_uses_standard_data_name():
    bpy.ops.wm.read_factory_settings(use_empty=True)
    plane_source = bpy.data.objects.new("Plane Source", None)
    plane_source.data = bpy.data.images.new(
        "Plane Source.png", width=2, height=2, alpha=True
    )
    anchored = np.zeros((2, 2, 3), dtype=np.float32)
    plane_depth = plane_build.create_depth_image(plane_source, anchored)
    assert plane_depth.name == "Plane Source_depth.exr"



def test_depth_surface_protected_smooth_evaluates():
    bpy.ops.wm.read_factory_settings(use_empty=True)
    image = bpy.data.images.new("Surface", width=64, height=64)
    source = bpy.data.objects.new("Surface", None)
    source.empty_display_type = "IMAGE"
    source.data = image
    source.empty_display_size = 2.0
    bpy.context.collection.objects.link(source)
    surface_material = bpy.data.materials.new("Surface.material")

    size = 8
    depth = np.ones((size, size), dtype=np.float32)
    x, y = np.meshgrid(np.arange(size), np.arange(size))
    intrinsics = np.asarray(
        ((8.0, 0.0, 3.5), (0.0, 8.0, 3.5), (0.0, 0.0, 1.0)),
        dtype=np.float32,
    )
    points = np.empty((size, size, 3), dtype=np.float32)
    points[..., 0] = (x - intrinsics[0, 2]) / intrinsics[0, 0] * depth
    points[..., 1] = (y - intrinsics[1, 2]) / intrinsics[1, 1] * depth
    points[..., 2] = depth
    field = (
        points,
        intrinsics,
        np.ones((size, size), dtype=bool),
        np.ones((size, size), dtype=bool),
        (size, size),
        1.0,
    )

    result = mesh.build_cutout_object(
        bpy.context,
        source,
        "DEPTH_SURFACE",
        8,
        surface_material,
        field=field,
        regions=((((0, 0), (64, 0), (64, 64), (0, 64)),),),
        image_size=(64, 64),
        keep_original=True,
    )

    assert all(abs(vertex.co.x) < 1e-8 for vertex in result.data.vertices)
    assert shapes.BALLOON_ATTRIBUTE_NAME in result.data.attributes
    modifier = result.modifiers[0]
    assert modifier.node_group.name == shapes.CUTOUT_NODE_GROUP_NAME
    assert modifier[
        mesh.modifier_input_identifier(modifier.node_group, "Shape")
    ] == shapes.CUTOUT_SHAPE_INDICES["DEPTH_SURFACE"]
    expected_cleanup = mesh._cutout_cleanup_area(
        mesh._cutout_point_spacing(source, 8),
        mesh._world_plane_metric(source.matrix_world)[0],
    )
    assert np.isclose(
        modifier[mesh.modifier_input_identifier(modifier.node_group, "Cleanup")],
        expected_cleanup,
    )
    assert modifier[
        mesh.modifier_input_identifier(modifier.node_group, "Smooth")
    ] == 1.0
    assert modifier[
        mesh.modifier_input_identifier(
            modifier.node_group, "Smooth Iterations"
        )
    ] == 0
    reference_id = mesh.modifier_input_identifier(
        modifier.node_group,
        "Reference Depth",
    )
    assert modifier[reference_id] == 8.0
    mesh.set_modifier_input(
        modifier,
        mesh.modifier_input_identifier(modifier.node_group, "Smooth"),
        0.0,
    )
    evaluated = result.evaluated_get(bpy.context.evaluated_depsgraph_get())
    baseline_mesh = evaluated.to_mesh()
    try:
        baseline_x = np.asarray([vertex.co.x for vertex in baseline_mesh.vertices])
        baseline_min = baseline_x.min()
        baseline_max = baseline_x.max()
    finally:
        evaluated.to_mesh_clear()

    mesh.set_modifier_input(
        modifier,
        mesh.modifier_input_identifier(modifier.node_group, "Thickness"),
        1.0,
    )
    result.update_tag(refresh={"DATA"})
    bpy.context.view_layer.update()
    evaluated = result.evaluated_get(bpy.context.evaluated_depsgraph_get())
    evaluated_mesh = evaluated.to_mesh()
    try:
        assert len(evaluated_mesh.polygons) > 0
        x = np.asarray([vertex.co.x for vertex in evaluated_mesh.vertices])
        assert np.isclose(x.min(), baseline_min, atol=1e-5)
        assert np.isclose(x.max(), baseline_max + 1.0, atol=1e-5)
    finally:
        evaluated.to_mesh_clear()

    mesh.set_modifier_input(
        modifier,
        mesh.modifier_input_identifier(
            modifier.node_group, "Smooth Iterations"
        ),
        4,
    )
    mesh.set_modifier_input(
        modifier,
        mesh.modifier_input_identifier(modifier.node_group, "Smooth"),
        1.0,
    )
    result.update_tag(refresh={"DATA"})
    bpy.context.view_layer.update()
    evaluated = result.evaluated_get(bpy.context.evaluated_depsgraph_get())
    internal_mesh = evaluated.to_mesh()
    try:
        internal_positions = np.asarray(
            [tuple(vertex.co) for vertex in internal_mesh.vertices]
        )
    finally:
        evaluated.to_mesh_clear()

    mesh.set_modifier_input(
        modifier,
        mesh.modifier_input_identifier(
            modifier.node_group, "Smooth Iterations"
        ),
        0,
    )
    external_group = bpy.data.node_groups.new("External O Smooth", "GeometryNodeTree")
    external_group.is_modifier = True
    node_graph.interface_socket(
        external_group, "Geometry", "OUTPUT", "NodeSocketGeometry"
    )
    node_graph.interface_socket(
        external_group, "Geometry", "INPUT", "NodeSocketGeometry"
    )
    external_iterations = node_graph.interface_socket(
        external_group, "Iterations", "INPUT", "NodeSocketInt"
    )
    external_iterations.default_value = 4
    external_iterations.min_value = 0
    external_smooth = node_graph.interface_socket(
        external_group, "Smooth", "INPUT", "NodeSocketFloat"
    )
    external_smooth.default_value = 1.0
    external_input = external_group.nodes.new("NodeGroupInput")
    external_output = external_group.nodes.new("NodeGroupOutput")
    external_geometry = node_graph.expand_smooth(
        external_group, external_input.outputs["Geometry"]
    )
    external_group.links.new(
        external_geometry, external_output.inputs["Geometry"]
    )
    external_modifier = result.modifiers.new("External O Smooth", "NODES")
    external_modifier.node_group = external_group
    result.update_tag(refresh={"DATA"})
    bpy.context.view_layer.update()
    evaluated = result.evaluated_get(bpy.context.evaluated_depsgraph_get())
    external_mesh = evaluated.to_mesh()
    try:
        external_positions = np.asarray(
            [tuple(vertex.co) for vertex in external_mesh.vertices]
        )
    finally:
        evaluated.to_mesh_clear()
    assert internal_positions.shape == external_positions.shape
    assert np.allclose(internal_positions, external_positions, atol=1e-6)



def _evaluated_positions(obj):
    evaluated = obj.evaluated_get(bpy.context.evaluated_depsgraph_get())
    result = evaluated.to_mesh()
    try:
        return np.asarray([tuple(vertex.co) for vertex in result.vertices])
    finally:
        evaluated.to_mesh_clear()


def _add_cutout_modifier(obj, shape):
    group = cutout_nodes.cutout_node_group(shape)
    modifier = obj.modifiers.new(group.name, "NODES")
    modifier.node_group = group
    mesh.set_modifier_input(
        modifier,
        mesh.modifier_input_identifier(group, "Shape"),
        shapes.CUTOUT_SHAPE_INDICES[shape],
    )
    mesh.set_modifier_input(
        modifier,
        mesh.modifier_input_identifier(group, "Cleanup"),
        0.0,
    )
    mesh.set_modifier_input(
        modifier,
        mesh.modifier_input_identifier(group, "Smooth"),
        0.0,
    )
    mesh.set_modifier_input(
        modifier,
        mesh.modifier_input_identifier(group, "Smooth Iterations"),
        1,
    )
    return modifier

def test_cutout_thickness_keeps_one_connected_shell():
    bpy.ops.wm.read_factory_settings(use_empty=True)
    vertices = [
        (0.0, float(y), float(z))
        for z in range(3)
        for y in range(3)
    ]
    faces = []
    for z in range(2):
        for y in range(2):
            a = z * 3 + y
            faces.extend(((a, a + 4, a + 1), (a, a + 3, a + 4)))
    data = bpy.data.meshes.new("Connected Cutout")
    data.from_pydata(vertices, (), faces)
    obj = bpy.data.objects.new("Connected Cutout", data)
    bpy.context.collection.objects.link(obj)
    modifier = _add_cutout_modifier(obj, "CUTOUT")

    mesh.set_modifier_input(
        modifier,
        mesh.modifier_input_identifier(modifier.node_group, "Cleanup"),
        0.0,
    )
    mesh.set_modifier_input(
        modifier,
        mesh.modifier_input_identifier(modifier.node_group, "Thickness"),
        1.0,
    )

    evaluated = obj.evaluated_get(bpy.context.evaluated_depsgraph_get())
    result = evaluated.to_mesh()
    try:
        assert len(result.vertices) == 18
        assert len(result.polygons) == 24
        x = np.asarray([vertex.co.x for vertex in result.vertices])
        assert np.isclose(x.min(), -0.5, atol=1e-6)
        assert np.isclose(x.max(), 0.5, atol=1e-6)
        front_faces = [
            polygon for polygon in result.polygons if polygon.normal.x < -0.9
        ]
        back_faces = [
            polygon for polygon in result.polygons if polygon.normal.x > 0.9
        ]
        side_faces = [
            polygon for polygon in result.polygons if abs(polygon.normal.x) < 0.1
        ]
        assert len(front_faces) == 8
        assert len(back_faces) == 8
        assert len(side_faces) == 8
        center = Vector((0.0, 1.0, 1.0))
        for polygon in side_faces:
            radial = polygon.center - center
            assert polygon.normal.dot(radial) > 0.0
    finally:
        evaluated.to_mesh_clear()

    mesh.set_modifier_input(
        modifier,
        mesh.modifier_input_identifier(modifier.node_group, "Thickness"),
        2.4,
    )
    obj.update_tag(refresh={"DATA"})
    bpy.context.view_layer.update()
    evaluated = obj.evaluated_get(bpy.context.evaluated_depsgraph_get())
    result = evaluated.to_mesh()
    try:
        assert len(result.vertices) == 34
        assert len(result.polygons) == 40
        side_faces = [
            polygon for polygon in result.polygons if abs(polygon.normal.x) < 0.1
        ]
        assert len(side_faces) == 24
        for polygon in side_faces:
            coordinates = [result.vertices[index].co for index in polygon.vertices]
            edge_lengths = [
                (coordinates[(index + 1) % len(coordinates)] - coordinate).length
                for index, coordinate in enumerate(coordinates)
            ]
            assert max(edge_lengths) / min(edge_lengths) <= 1.25 + 1e-6
    finally:
        evaluated.to_mesh_clear()


def test_balloon_uses_injected_profile_at_default_height():
    bpy.ops.wm.read_factory_settings(use_empty=True)
    vertices = [
        (0.0, float(y), float(z))
        for z in range(3)
        for y in range(3)
    ]
    faces = []
    for z in range(2):
        for y in range(2):
            a = z * 3 + y
            faces.extend(((a, a + 1, a + 4), (a, a + 4, a + 3)))
    data = bpy.data.meshes.new("Balloon Profile")
    data.from_pydata(vertices, (), faces)
    mesh._assign_float_point_attribute(
        data,
        shapes.BALLOON_ATTRIBUTE_NAME,
        (0.0, 0.0, 0.0, 0.0, 1.0, 0.0, 0.0, 0.0, 0.0),
    )
    obj = bpy.data.objects.new("Balloon Profile", data)
    bpy.context.collection.objects.link(obj)
    modifier = _add_cutout_modifier(obj, "BALLOON")

    mesh.set_modifier_input(
        modifier,
        mesh.modifier_input_identifier(modifier.node_group, "Cleanup"),
        0.0,
    )
    mesh.set_modifier_input(
        modifier,
        mesh.modifier_input_identifier(modifier.node_group, "Thickness"),
        1.0,
    )

    bpy.context.view_layer.update()
    positions = _evaluated_positions(obj)
    assert np.isclose(positions[:, 0].min(), -1.0, atol=1e-6)
    assert np.isclose(positions[:, 0].max(), 1.0, atol=1e-6)
    assert np.isclose(
        positions[:, 0].min(),
        -positions[:, 0].max(),
        atol=1e-5,
    )
    evaluated = obj.evaluated_get(bpy.context.evaluated_depsgraph_get())
    result = evaluated.to_mesh()
    try:
        baseline_face_count = len(result.polygons)
    finally:
        evaluated.to_mesh_clear()
    mesh.set_modifier_input(
        modifier,
        mesh.modifier_input_identifier(modifier.node_group, "Thickness"),
        2.0,
    )
    obj.update_tag(refresh={"DATA"})
    bpy.context.view_layer.update()
    evaluated = obj.evaluated_get(bpy.context.evaluated_depsgraph_get())
    result = evaluated.to_mesh()
    try:
        assert len(result.polygons) == baseline_face_count
        x = np.asarray([vertex.co.x for vertex in result.vertices])
        assert np.isclose(x.min(), -2.0, atol=1e-6)
        assert np.isclose(x.max(), 2.0, atol=1e-6)
    finally:
        evaluated.to_mesh_clear()
    mesh.set_modifier_input(
        modifier,
        mesh.modifier_input_identifier(modifier.node_group, "Thickness"),
        0.0,
    )
    obj.update_tag(refresh={"DATA"})
    bpy.context.view_layer.update()
    zero_positions = _evaluated_positions(obj)
    assert len(zero_positions) == len(vertices)
    assert np.allclose(zero_positions[:, 0], 0.0, atol=1e-6)


def test_cutout_cleanup_uses_absolute_area_with_many_small_islands():
    bpy.ops.wm.read_factory_settings(use_empty=True)
    vertices = [
        (0.0, float(y), float(z))
        for z in range(3)
        for y in range(3)
    ]
    faces = []
    for z in range(2):
        for y in range(2):
            a = z * 3 + y
            faces.extend(((a, a + 1, a + 4), (a, a + 4, a + 3)))
    for island in range(12):
        start = len(vertices)
        y = 5.0 + island * 0.1
        vertices.extend(
            ((0.0, y, 5.0), (0.0, y + 0.01, 5.0), (0.0, y, 5.01))
        )
        faces.append((start, start + 1, start + 2))
    data = bpy.data.meshes.new("Cleanup")
    data.from_pydata(vertices, (), faces)
    obj = bpy.data.objects.new("Cleanup", data)
    bpy.context.collection.objects.link(obj)
    modifier = _add_cutout_modifier(obj, "CUTOUT")

    cleanup_id = mesh.modifier_input_identifier(modifier.node_group, "Cleanup")

    mesh.set_modifier_input(modifier, cleanup_id, 0.0)
    bpy.context.view_layer.update()
    assert len(_evaluated_positions(obj)) == 45

    mesh.set_modifier_input(modifier, cleanup_id, 0.001)
    obj.update_tag(refresh={"DATA"})
    bpy.context.view_layer.update()
    assert len(_evaluated_positions(obj)) == 9


def test_depth_balloon_uses_metric_plane_inputs_without_controller():
    bpy.ops.wm.read_factory_settings(use_empty=True)
    image = bpy.data.images.new("Depth Balloon", width=100, height=100, alpha=True)
    source = bpy.data.objects.new("Depth Balloon", None)
    source.empty_display_type = "IMAGE"
    source.data = image
    source.empty_display_size = 2.0
    bpy.context.collection.objects.link(source)
    balloon_material = bpy.data.materials.new("Depth Balloon.material")
    crop_bounds = (50, 20, 90, 80)
    crop = ((0, 0), (40, 0), (40, 60), (0, 60))
    local_bounds = mesh._crop_plane_bounds(
        source,
        crop_bounds,
        (100, 100),
    )
    y, x = np.indices((61, 41), dtype=np.float32)
    normalized_x = x / 40.0 * 2.0 - 1.0
    normalized_y = y / 60.0 * 2.0 - 1.0
    points = np.zeros((61, 41, 3), dtype=np.float32)
    points[..., 0] = normalized_x
    points[..., 1] = normalized_y
    points[..., 2] = 2.0 + normalized_x * 0.15 - normalized_y * 0.1
    points[27:34, 17:24, 2] -= 0.25
    intrinsics = np.asarray(
        ((50.0, 0.0, 20.0), (0.0, 50.0, 30.0), (0.0, 0.0, 1.0)),
        dtype=np.float32,
    )
    field = (
        points,
        intrinsics,
        np.ones((61, 41), dtype=bool),
        np.ones((61, 41), dtype=bool),
        (41, 61),
        2.0,
    )

    result = mesh.build_cutout_object(
        bpy.context,
        source,
        "DEPTH_BALLOON",
        8,
        balloon_material,
        field=field,
        regions=((crop,),),
        image_size=(40, 60),
        bounds=local_bounds,
        keep_original=True,
    )

    assert all(abs(vertex.co.x) < 1e-8 for vertex in result.data.vertices)
    assert shapes.BALLOON_ATTRIBUTE_NAME in result.data.attributes
    assert "o_balloon_depth" not in result.data.attributes
    assert "o_depth_offset" not in result.data.attributes
    assert not result.children
    assert {obj.name for obj in bpy.context.scene.objects} == {
        source.name,
        result.name,
    }
    modifier = result.modifiers[0]
    depth_image_id = mesh.modifier_input_identifier(
        modifier.node_group,
        "Depth Image",
    )
    assert isinstance(modifier[depth_image_id], bpy.types.Image)
    expected_center = np.zeros(2, dtype=np.float64)
    crop_center = Vector(
        (
            (local_bounds[0] + local_bounds[1]) * 0.5,
            (local_bounds[2] + local_bounds[3]) * 0.5,
            0.0,
        )
    )
    expected_origin = source.matrix_world @ crop_center
    assert np.allclose(
        tuple(result.matrix_world.translation),
        tuple(expected_origin),
        atol=1e-5,
    )

    depth_reference_id = mesh.modifier_input_identifier(
        modifier.node_group,
        "Reference Depth",
    )
    assert modifier[depth_reference_id] == 8.0
    depth_direction_id = mesh.modifier_input_identifier(
        modifier.node_group,
        "Depth Direction",
    )
    direction = np.asarray(modifier[depth_direction_id], dtype=np.float64)
    assert np.array_equal(direction, (0.0, 0.0, 1.0))
    uniform_scale_id = mesh.modifier_input_identifier(
        modifier.node_group,
        "Uniform Scale",
    )
    assert modifier[uniform_scale_id] > 0.0
    thickness_id = mesh.modifier_input_identifier(
        modifier.node_group,
        "Thickness",
    )
    smooth_id = mesh.modifier_input_identifier(
        modifier.node_group,
        "Smooth",
    )
    assert modifier[smooth_id] == 1.0
    mesh.set_modifier_input(modifier, smooth_id, 0.0)
    result.update_tag(refresh={"DATA"})
    bpy.context.view_layer.update()
    positions = _evaluated_positions(result)
    center_distance = np.linalg.norm(positions[:, 1:] - expected_center, axis=1)
    nearest_center = center_distance <= center_distance.min() + 1e-6
    depth_at_thickness_one = positions[nearest_center, 0].min()
    mesh.set_modifier_input(modifier, thickness_id, 2.0)
    result.update_tag(refresh={"DATA"})
    bpy.context.view_layer.update()
    positions = _evaluated_positions(result)
    center_distance = np.linalg.norm(positions[:, 1:] - expected_center, axis=1)
    nearest_center = center_distance <= center_distance.min() + 1e-6
    depth_at_thickness_two = positions[nearest_center, 0].min()
    assert np.isclose(
        depth_at_thickness_one,
        depth_at_thickness_two,
        atol=1e-5,
    )
    mesh.set_modifier_input(modifier, thickness_id, 1.0)
    result.update_tag(refresh={"DATA"})
    bpy.context.view_layer.update()

    before_positions = _evaluated_positions(result)
    mesh.set_modifier_input(
        modifier,
        depth_reference_id,
        modifier[depth_reference_id] + 0.2,
    )
    result.update_tag(refresh={"DATA"})
    bpy.context.view_layer.update()
    after_positions = _evaluated_positions(result)
    assert np.isclose(
        (after_positions[:, 0] - before_positions[:, 0]).min(),
        -0.2,
        atol=1e-5,
    )

    depth_scale_id = mesh.modifier_input_identifier(
        modifier.node_group,
        "Depth Scale",
    )
    mesh.set_modifier_input(modifier, depth_scale_id, 0.0)
    result.update_tag(refresh={"DATA"})
    bpy.context.view_layer.update()
    zero_scale_before = _evaluated_positions(result)
    mesh.set_modifier_input(
        modifier,
        depth_reference_id,
        modifier[depth_reference_id] + 0.15,
    )
    mesh.set_modifier_input(modifier, depth_direction_id, (0.2, 0.1, 1.0))
    result.update_tag(refresh={"DATA"})
    bpy.context.view_layer.update()
    zero_scale_after = _evaluated_positions(result)
    assert np.allclose(zero_scale_after, zero_scale_before, atol=1e-5)
    mesh.set_modifier_input(modifier, depth_scale_id, 1.0)

    double_sided_id = mesh.modifier_input_identifier(
        modifier.node_group,
        "Double Sided",
    )
    mesh.set_modifier_input(modifier, double_sided_id, True)
    result.update_tag(refresh={"DATA"})
    bpy.context.view_layer.update()
    mirrored = _evaluated_positions(result)
    layers = {}
    for x, y, z in mirrored:
        layers.setdefault((round(float(y), 6), round(float(z), 6)), []).append(x)
    assert layers
    for x_values in layers.values():
        if len(x_values) == 1:
            assert np.isclose(x_values[0], 0.0, atol=1e-5)
            continue
        assert np.isclose(
            min(x_values) + max(x_values),
            0.0,
            atol=1e-5,
        )


def test_loaded_normal_image_uses_normal_texture_name(tmp_path):
    from PIL import Image

    path = tmp_path / "normal.png"
    Image.new("RGB", (1, 1), (128, 128, 255)).save(path)
    source = SimpleNamespace(data=SimpleNamespace(name="Poster.png"))

    image = mesh._load_normal_image(path, source)

    assert image.name == "Poster_normal.png"
    assert image.colorspace_settings.name == "Non-Color"
    assert image.packed_file is not None

def test_converted_color_images_are_new_and_use_blender_duplicate_suffix():
    bpy.ops.wm.read_factory_settings(use_empty=True)
    image = bpy.data.images.new("Poster", width=16, height=16)
    source = bpy.data.objects.new("Poster", None)
    source.empty_display_type = "IMAGE"
    source.data = image
    bpy.context.collection.objects.link(source)

    first = plane_build.copy_color_image(source)
    second = plane_build.copy_color_image(source)

    assert first is not image
    assert second is not image
    assert first is not second
    assert first.name == "Poster_color.png"
    assert second.name == "Poster_color.png.001"


def test_local_cutout_selection_matches_uint8_tenth_alpha_boundary():
    bpy.ops.wm.read_factory_settings(use_empty=True)
    image = bpy.data.images.new("Alpha Cutout", width=4, height=4, alpha=True)
    top_down = np.ones((4, 4, 4), dtype=np.float32)
    top_down[1, 1, 3] = 25.0 / 255.0
    top_down[1, 2, 3] = 26.0 / 255.0
    image.pixels.foreach_set(np.flipud(top_down).ravel())
    source = bpy.data.objects.new("Alpha Cutout", None)
    source.empty_display_type = "IMAGE"
    source.data = image

    _rgba, selection = mesh._local_cutout_rgba(
        source,
        ((0, 0), (4, 0), (4, 4), (0, 4)),
    )

    assert selection[1, 1] == 0.0
    assert selection[1, 2] > 0.1

def test_local_cutout_builds_from_blender_image_pixels_without_a_job():
    bpy.ops.wm.read_factory_settings(use_empty=True)
    image = bpy.data.images.new("Local Cutout", width=64, height=48, alpha=True)
    pixels = np.ones((48, 64, 4), dtype=np.float32)
    image.pixels.foreach_set(pixels.ravel())
    source = bpy.data.objects.new("Local Cutout", None)
    source.empty_display_type = "IMAGE"
    source.data = image
    bpy.context.collection.objects.link(source)
    source.select_set(True)
    bpy.context.view_layer.objects.active = source
    selection = "[[-8,8],[72,8],[72,40],[-8,40]]"
    source_bounds = mesh.plane_bounds(source)

    with patch.object(mesh, "push_undo") as undo:
        mesh.build_local_cutout(
            SimpleNamespace(mesh_detail=16),
            bpy.context,
            source,
            "CUTOUT",
            selection,
        )

    result = bpy.context.view_layer.objects.active
    assert result is not source
    assert result.type == "MESH"
    assert result["anyimage_mesh_shape"] == "CUTOUT"
    modifier = result.modifiers[0]
    assert modifier.node_group.name == shapes.CUTOUT_NODE_GROUP_NAME
    assert modifier[
        mesh.modifier_input_identifier(modifier.node_group, "Shape")
    ] == shapes.CUTOUT_SHAPE_INDICES["CUTOUT"]
    expected_cleanup = mesh._cutout_cleanup_area(
        mesh._cutout_point_spacing(source, 16),
        mesh._world_plane_metric(source.matrix_world)[0],
    )
    assert np.isclose(
        modifier[mesh.modifier_input_identifier(modifier.node_group, "Cleanup")],
        expected_cleanup,
    )
    assert modifier[
        mesh.modifier_input_identifier(modifier.node_group, "Smooth")
    ] == 1.0
    assert modifier[
        mesh.modifier_input_identifier(
            modifier.node_group, "Smooth Iterations"
        )
    ] == 0
    assert len(result.data.vertices) > 4
    assert len(result.data.polygons) > 1
    assert all(polygon.use_smooth for polygon in result.data.polygons)
    assert all(abs(vertex.co.x) < 1e-8 for vertex in result.data.vertices)
    assert shapes.BALLOON_ATTRIBUTE_NAME in result.data.attributes
    source_inverse = source.matrix_world.inverted()
    source_x = [
        (source_inverse @ (result.matrix_world @ vertex.co)).x
        for vertex in result.data.vertices
    ]
    assert min(source_x) >= source_bounds[0]
    assert max(source_x) <= source_bounds[1]
    assert bpy.data.objects.get(source.name) is source
    assert result.data.materials[0].node_tree is not None
    color_texture = next(
        node
        for node in result.data.materials[0].node_tree.nodes
        if node.bl_idname == "ShaderNodeTexImage"
    )
    assert color_texture.image is not image
    assert tuple(color_texture.image.size) == (64, 34)
    copied = np.empty(34 * 64 * 4, dtype=np.float32)
    color_texture.image.pixels.foreach_get(copied)
    copied = copied.reshape((34, 64, 4))
    assert np.allclose(copied, 1.0)
    undo.assert_called_once_with("Convert to Cutout")