Python MeshBuilder.reserveFaceCount方法代码示例

# 需要导入模块: from UM.Mesh.MeshBuilder import MeshBuilder [as 别名]
# 或者: from UM.Mesh.MeshBuilder.MeshBuilder import reserveFaceCount [as 别名]
    def _generateSceneNode(self, file_name, xz_size, peak_height, base_height, blur_iterations, max_size, image_color_invert):
        scene_node = SceneNode()

        mesh = MeshBuilder()

        img = QImage(file_name)

        if img.isNull():
            Logger.log("e", "Image is corrupt.")
            return None

        width = max(img.width(), 2)
        height = max(img.height(), 2)
        aspect = height / width

        if img.width() < 2 or img.height() < 2:
            img = img.scaled(width, height, Qt.IgnoreAspectRatio)

        base_height = max(base_height, 0)
        peak_height = max(peak_height, -base_height)

        xz_size = max(xz_size, 1)
        scale_vector = Vector(xz_size, peak_height, xz_size)

        if width > height:
            scale_vector = scale_vector.set(z=scale_vector.z * aspect)
        elif height > width:
            scale_vector = scale_vector.set(x=scale_vector.x / aspect)

        if width > max_size or height > max_size:
            scale_factor = max_size / width
            if height > width:
                scale_factor = max_size / height

            width = int(max(round(width * scale_factor), 2))
            height = int(max(round(height * scale_factor), 2))
            img = img.scaled(width, height, Qt.IgnoreAspectRatio)

        width_minus_one = width - 1
        height_minus_one = height - 1

        Job.yieldThread()

        texel_width = 1.0 / (width_minus_one) * scale_vector.x
        texel_height = 1.0 / (height_minus_one) * scale_vector.z

        height_data = numpy.zeros((height, width), dtype=numpy.float32)

        for x in range(0, width):
            for y in range(0, height):
                qrgb = img.pixel(x, y)
                avg = float(qRed(qrgb) + qGreen(qrgb) + qBlue(qrgb)) / (3 * 255)
                height_data[y, x] = avg

        Job.yieldThread()

        if image_color_invert:
            height_data = 1 - height_data

        for _ in range(0, blur_iterations):
            copy = numpy.pad(height_data, ((1, 1), (1, 1)), mode= "edge")

            height_data += copy[1:-1, 2:]
            height_data += copy[1:-1, :-2]
            height_data += copy[2:, 1:-1]
            height_data += copy[:-2, 1:-1]

            height_data += copy[2:, 2:]
            height_data += copy[:-2, 2:]
            height_data += copy[2:, :-2]
            height_data += copy[:-2, :-2]

            height_data /= 9

            Job.yieldThread()

        height_data *= scale_vector.y
        height_data += base_height

        heightmap_face_count = 2 * height_minus_one * width_minus_one
        total_face_count = heightmap_face_count + (width_minus_one * 2) * (height_minus_one * 2) + 2

        mesh.reserveFaceCount(total_face_count)

        # initialize to texel space vertex offsets.
        # 6 is for 6 vertices for each texel quad.
        heightmap_vertices = numpy.zeros((width_minus_one * height_minus_one, 6, 3), dtype = numpy.float32)
        heightmap_vertices = heightmap_vertices + numpy.array([[
            [0, base_height, 0],
            [0, base_height, texel_height],
            [texel_width, base_height, texel_height],
            [texel_width, base_height, texel_height],
            [texel_width, base_height, 0],
            [0, base_height, 0]
        ]], dtype = numpy.float32)

        offsetsz, offsetsx = numpy.mgrid[0: height_minus_one, 0: width - 1]
        offsetsx = numpy.array(offsetsx, numpy.float32).reshape(-1, 1) * texel_width
        offsetsz = numpy.array(offsetsz, numpy.float32).reshape(-1, 1) * texel_height

#.........这里部分代码省略.........

# 需要导入模块: from UM.Mesh.MeshBuilder import MeshBuilder [as 别名]
# 或者: from UM.Mesh.MeshBuilder.MeshBuilder import reserveFaceCount [as 别名]
    def read(self, file_name):
        result = SceneNode()
        # The base object of 3mf is a zipped archive.
        archive = zipfile.ZipFile(file_name, "r")
        try:
            root = ET.parse(archive.open("3D/3dmodel.model"))

            # There can be multiple objects, try to load all of them.
            objects = root.findall("./3mf:resources/3mf:object", self._namespaces)
            if len(objects) == 0:
                Logger.log("w", "No objects found in 3MF file %s, either the file is corrupt or you are using an outdated format", file_name)
                return None

            for entry in objects:
                mesh_builder = MeshBuilder()
                node = SceneNode()
                vertex_list = []
                #for vertex in entry.mesh.vertices.vertex:
                for vertex in entry.findall(".//3mf:vertex", self._namespaces):
                    vertex_list.append([vertex.get("x"), vertex.get("y"), vertex.get("z")])
                    Job.yieldThread()

                triangles = entry.findall(".//3mf:triangle", self._namespaces)
                mesh_builder.reserveFaceCount(len(triangles))

                #for triangle in object.mesh.triangles.triangle:
                for triangle in triangles:
                    v1 = int(triangle.get("v1"))
                    v2 = int(triangle.get("v2"))
                    v3 = int(triangle.get("v3"))

                    mesh_builder.addFaceByPoints(vertex_list[v1][0], vertex_list[v1][1], vertex_list[v1][2],
                                                 vertex_list[v2][0], vertex_list[v2][1], vertex_list[v2][2],
                                                 vertex_list[v3][0], vertex_list[v3][1], vertex_list[v3][2])

                    Job.yieldThread()

                # Rotate the model; We use a different coordinate frame.
                rotation = Matrix()
                rotation.setByRotationAxis(-0.5 * math.pi, Vector(1,0,0))

                #TODO: We currently do not check for normals and simply recalculate them.
                mesh_builder.calculateNormals()

                node.setMeshData(mesh_builder.build().getTransformed(rotation))
                node.setSelectable(True)

                transformations = root.findall("./3mf:build/3mf:item[@objectid='{0}']".format(entry.get("id")), self._namespaces)
                transformation = transformations[0] if transformations else None
                if transformation is not None and transformation.get("transform"):
                    splitted_transformation = transformation.get("transform").split()
                    ## Transformation is saved as:
                    ## M00 M01 M02 0.0
                    ## M10 M11 M12 0.0
                    ## M20 M21 M22 0.0
                    ## M30 M31 M32 1.0
                    ## We switch the row & cols as that is how everyone else uses matrices!
                    temp_mat = Matrix()
                    # Rotation & Scale
                    temp_mat._data[0,0] = splitted_transformation[0]
                    temp_mat._data[1,0] = splitted_transformation[1]
                    temp_mat._data[2,0] = splitted_transformation[2]
                    temp_mat._data[0,1] = splitted_transformation[3]
                    temp_mat._data[1,1] = splitted_transformation[4]
                    temp_mat._data[2,1] = splitted_transformation[5]
                    temp_mat._data[0,2] = splitted_transformation[6]
                    temp_mat._data[1,2] = splitted_transformation[7]
                    temp_mat._data[2,2] = splitted_transformation[8]

                    # Translation
                    temp_mat._data[0,3] = splitted_transformation[9]
                    temp_mat._data[1,3] = splitted_transformation[10]
                    temp_mat._data[2,3] = splitted_transformation[11]

                    node.setTransformation(temp_mat)

                result.addChild(node)

                Job.yieldThread()

            #If there is more then one object, group them.
            if len(objects) > 1:
                group_decorator = GroupDecorator()
                result.addDecorator(group_decorator)
        except Exception as e:
            Logger.log("e" ,"exception occured in 3mf reader: %s" , e)

        return result  

# 需要导入模块: from UM.Mesh.MeshBuilder import MeshBuilder [as 别名]
# 或者: from UM.Mesh.MeshBuilder.MeshBuilder import reserveFaceCount [as 别名]
    def _createNodeFromObject(self, object, name = ""):
        node = SceneNode()
        node.setName(name)
        mesh_builder = MeshBuilder()
        vertex_list = []

        components = object.find(".//3mf:components", self._namespaces)
        if components:
            for component in components:
                id = component.get("objectid")
                new_object = self._root.find("./3mf:resources/3mf:object[@id='{0}']".format(id), self._namespaces)
                new_node = self._createNodeFromObject(new_object, self._base_name + "_" + str(id))
                node.addChild(new_node)
                transform = component.get("transform")
                if transform is not None:
                    new_node.setTransformation(self._createMatrixFromTransformationString(transform))

        # for vertex in entry.mesh.vertices.vertex:
        for vertex in object.findall(".//3mf:vertex", self._namespaces):
            vertex_list.append([vertex.get("x"), vertex.get("y"), vertex.get("z")])
            Job.yieldThread()

        xml_settings = list(object.findall(".//cura:setting", self._namespaces))

        # Add the setting override decorator, so we can add settings to this node.
        if xml_settings:
            node.addDecorator(SettingOverrideDecorator())

            global_container_stack = Application.getInstance().getGlobalContainerStack()
            # Ensure the correct next container for the SettingOverride decorator is set.
            if global_container_stack:
                multi_extrusion = global_container_stack.getProperty("machine_extruder_count", "value") > 1
                # Ensure that all extruder data is reset
                if not multi_extrusion:
                    default_stack_id = global_container_stack.getId()
                else:
                    default_stack = ExtruderManager.getInstance().getExtruderStack(0)
                    if default_stack:
                        default_stack_id = default_stack.getId()
                    else:
                        default_stack_id = global_container_stack.getId()
                node.callDecoration("setActiveExtruder", default_stack_id)

                # Get the definition & set it
                definition = QualityManager.getInstance().getParentMachineDefinition(global_container_stack.getBottom())
                node.callDecoration("getStack").getTop().setDefinition(definition)

            setting_container = node.callDecoration("getStack").getTop()
            for setting in xml_settings:
                setting_key = setting.get("key")
                setting_value = setting.text

                # Extruder_nr is a special case.
                if setting_key == "extruder_nr":
                    extruder_stack = ExtruderManager.getInstance().getExtruderStack(int(setting_value))
                    if extruder_stack:
                        node.callDecoration("setActiveExtruder", extruder_stack.getId())
                    else:
                        Logger.log("w", "Unable to find extruder in position %s", setting_value)
                    continue
                setting_container.setProperty(setting_key,"value", setting_value)

        if len(node.getChildren()) > 0:
            group_decorator = GroupDecorator()
            node.addDecorator(group_decorator)

        triangles = object.findall(".//3mf:triangle", self._namespaces)
        mesh_builder.reserveFaceCount(len(triangles))

        for triangle in triangles:
            v1 = int(triangle.get("v1"))
            v2 = int(triangle.get("v2"))
            v3 = int(triangle.get("v3"))

            mesh_builder.addFaceByPoints(vertex_list[v1][0], vertex_list[v1][1], vertex_list[v1][2],
                                         vertex_list[v2][0], vertex_list[v2][1], vertex_list[v2][2],
                                         vertex_list[v3][0], vertex_list[v3][1], vertex_list[v3][2])

            Job.yieldThread()

        # TODO: We currently do not check for normals and simply recalculate them.
        mesh_builder.calculateNormals()
        mesh_builder.setFileName(name)
        mesh_data = mesh_builder.build()

        if len(mesh_data.getVertices()):
            node.setMeshData(mesh_data)

        node.setSelectable(True)
        return node