Python OpenMaya.MVector方法代码示例

# 需要导入模块: from maya import OpenMaya [as 别名]
# 或者: from maya.OpenMaya import MVector [as 别名]
def sample_triangle(self,triangle_id, point_id):
        """ sample a random point on a the given triangle """

        r = random.random()
        s = random.random()

        if r + s >= 1:
            r = 1 - r
            s = 1 - s

        r = om.MScriptUtil(r).asFloat()
        s = om.MScriptUtil(s).asFloat()

        r = self.geo_cache.AB[triangle_id] * r
        s = self.geo_cache.AC[triangle_id] * s

        p = om.MPoint(r + s + om.MVector(self.geo_cache.p0[triangle_id]))
        u = 0
        v = 0

        self.point_data.set(point_id, p, self.geo_cache.normals[triangle_id],
                            self.geo_cache.poly_id[triangle_id], u, v) 

# 需要导入模块: from maya import OpenMaya [as 别名]
# 或者: from maya.OpenMaya import MVector [as 别名]
def slope_filter(self, min_slope, max_slope, fuzz):

        world = om.MVector(0, 1, 0)

        invalid_ids = []
        for i, (_, normal, _, _, _) in enumerate(self.point_data):
            normal = om.MVector(normal[0], normal[1], normal[2])
            angle = math.degrees(normal.angle(world)) + 45 * random.uniform(-fuzz, fuzz)

            if angle < min_slope or angle > max_slope:
                invalid_ids.append(i)

        invalid_ids = sorted(invalid_ids, reverse=True)
        [self.point_data.remove(index) for index in invalid_ids]


        pass 

# 需要导入模块: from maya import OpenMaya [as 别名]
# 或者: from maya.OpenMaya import MVector [as 别名]
def get_rotation(self, direction, weight, min_rot, max_rot):
        """ get rotation from a matrix pointing towards the given direction
        slerped by the given weight into the world up vector and added a random
        rotation between min and max rotation """

        r_x = math.radians(random.uniform(min_rot[0], max_rot[0]))
        r_y = math.radians(random.uniform(min_rot[1], max_rot[1]))
        r_z = math.radians(random.uniform(min_rot[2], max_rot[2]))
        util = om.MScriptUtil()
        util.createFromDouble(r_x, r_y, r_z)
        rotation_ptr = util.asDoublePtr()

        matrix = om.MTransformationMatrix()
        matrix.setRotation(rotation_ptr, om.MTransformationMatrix.kXYZ)
        world_up = om.MVector(0, 1, 0)
        rotation = om.MQuaternion(world_up, direction, weight)
        matrix = matrix.asMatrix() * rotation.asMatrix()
        rotation = om.MTransformationMatrix(matrix).rotation().asEulerRotation()

        return om.MVector(math.degrees(rotation.x),
                          math.degrees(rotation.y),
                          math.degrees(rotation.z)) 

# 需要导入模块: from maya import OpenMaya [as 别名]
# 或者: from maya.OpenMaya import MVector [as 别名]
def align_action(self, flag):
        position, normal, tangent = self.get_brush_coords()
        radius = self.brush_state.radius
        neighbour = self.instance_data.get_closest_points(position, radius, self.brush_state.settings['ids'])
        if neighbour:
            self.set_cache_length(len(neighbour))
        else:
            return

        for i, index in enumerate(neighbour):
            rotation = self.instance_data.rotation[index]

            # add to undo stack
            if not self.last_state.has_key(index):
                self.last_state[index] = om.MVector(rotation.x, rotation.y, rotation.z)

            normal = self.instance_data.normal[index]
            direction = self.get_alignment(normal)
            rotation = self.rotate_into(direction, rotation)
            self.rotation.set(rotation, i)

        self.instance_data.set_points(neighbour, rotation=self.rotation)
        self.instance_data.set_state() 

# 需要导入模块: from maya import OpenMaya [as 别名]
# 或者: from maya.OpenMaya import MVector [as 别名]
def scale_action(self, flag):
        position, normal, tangent = self.get_brush_coords()
        radius = self.brush_state.radius

        neighbour = self.instance_data.get_closest_points(position, radius, self.brush_state.settings['ids'])
        if neighbour:
            self.set_cache_length(len(neighbour))
        else:
            return

        for i, index in enumerate(neighbour):
            value = self.instance_data.scale[index]
            factor = self.brush_state.settings['scale_factor']
            falloff_weight = self.get_falloff_weight(self.instance_data.position[index])
            factor = (factor - 1) * falloff_weight + 1
            self.scale.set(value * factor, i)

            # add to undo stack
            if not self.last_state.has_key(index):
                self.last_state[index] = om.MVector(value.x, value.y, value.z)

        self.instance_data.set_points(neighbour, scale=self.scale)
        self.instance_data.set_state() 

# 需要导入模块: from maya import OpenMaya [as 别名]
# 或者: from maya.OpenMaya import MVector [as 别名]
def undo_vector_action(self, attr, undo_command):
        """ undo transformation attributes.
        scale, rotatio be undone with this method
        :param attr: the instance data attribute that should changed
        :type attr: string
        :param undo_command: a list of index, x, y, z vale, repeating in this pattern
        :type undo_command: list
        :return: """

        if not hasattr(self.instance_data, attr):
            self.logger.error('Instance data has not attribute: {}'.format(attr))
            return

        ids = []
        values = om.MVectorArray()
        for i in range(len(undo_command) / 4):
            ids.append(int(undo_command[i * 4]))
            val_x = float(undo_command[i * 4 + 1])
            val_y = float(undo_command[i * 4 + 2])
            val_z = float(undo_command[i * 4 + 3])
            values.append(om.MVector(val_x, val_y, val_z))

        self.instance_data.set_points(ids, **{attr: values})
        self.instance_data.set_state() 

# 需要导入模块: from maya import OpenMaya [as 别名]
# 或者: from maya.OpenMaya import MVector [as 别名]
def get_scale(self, flag, index=0):
        """ get scale values for the currently saved point at the given index """

        # when we in drag mode we want to maintain old scale values
        if self.brush_state.shift_mod and flag != SporeToolCmd.k_click:
            scale = self.initial_scale[index]

        # otherweise we generate new values
        else:
            min_scale = self.brush_state.settings['min_scale']
            max_scale = self.brush_state.settings['max_scale']
            uniform = self.brush_state.settings['uni_scale']
            if uniform:
                scale_x = scale_y = scale_z = random.uniform(min_scale[0], max_scale[0])
            else:
                scale_x = random.uniform(min_scale[0], max_scale[0])
                scale_y = random.uniform(min_scale[1], max_scale[1])
                scale_z = random.uniform(min_scale[2], max_scale[2])

            scale = om.MVector(scale_x, scale_y, scale_z)
            self.initial_scale.set(scale, index)

        return scale 

# 需要导入模块: from maya import OpenMaya [as 别名]
# 或者: from maya.OpenMaya import MVector [as 别名]
def hit_test(target, x, y, invert_y=True):

    origin = om.MPoint()
    direction = om.MVector()
    view = window_utils.active_view()

    if invert_y:
        y = view.portHeight() - y

    view.viewToWorld(x, y, origin, direction)
    mesh_fn = get_mesh_fn(target)

    if mesh_fn:
        points = om.MPointArray()
        intersect = mesh_fn.intersect(origin, direction, points, 1.0e-3, om.MSpace.kWorld)
        if intersect:
            point = points[0]
            normal = om.MVector()
            mesh_fn.getClosestNormal(point, normal, om.MSpace.kWorld)
            tangent = get_tangent(normal)

            position = (point.x, point.y, point.z)
            tangent = (tangent.x, tangent.y, tangent.z)
            normal = (normal.x, normal.y, normal.z)
            return (position, normal, tangent) 

# 需要导入模块: from maya import OpenMaya [as 别名]
# 或者: from maya.OpenMaya import MVector [as 别名]
def get_closest_point_and_normal(point, target):
    """ find the closest point and normal to the given point
    :return: closest point
             closest normal
             distance to the closest point """

    closest_point = None
    closest_normal = None
    #  shortest_distance = None

    #  for target in targets:
    mesh_fn = get_mesh_fn(target)
    out_point = om.MPoint()
    out_normal = om.MVector()
    mesh_fn.getClosestPointAndNormal(point, out_point, out_normal, om.MSpace.kWorld)
    #  out_tangent = get_tangent(normal)

    return out_point, out_normal 

# 需要导入模块: from maya import OpenMaya [as 别名]
# 或者: from maya.OpenMaya import MVector [as 别名]
def get_tangent(normal):
    """ return a normalized tangent for the given normal I
    :param normal MVector: normal vector
    :return MVector: tangent """

    if isinstance(normal, om.MVector):
        u = normal ^ om.MVector(0, 0, 1)
        v = normal ^ om.MVector(0, 1, 0)

        if u.length() > v.length():
            tangent = u.normal()
        else:
            tangent = v.normal()

        return (normal ^ tangent).normal()

    else:
        raise TypeError('Input must be of type MVector, is: {}'.format(type(normal))) 

# 需要导入模块: from maya import OpenMaya [as 别名]
# 或者: from maya.OpenMaya import MVector [as 别名]
def __init__(self, t=datatypes.Matrix()):

        self.transform = t

        d = [t.data[j][i]
             for j in range(len(t.data))
             for i in range(len(t.data[0]))]

        m = OpenMaya.MMatrix()
        OpenMaya.MScriptUtil.createMatrixFromList(d, m)
        m = OpenMaya.MTransformationMatrix(m)

        x = OpenMaya.MVector(1, 0, 0).rotateBy(m.rotation())
        y = OpenMaya.MVector(0, 1, 0).rotateBy(m.rotation())
        z = OpenMaya.MVector(0, 0, 1).rotateBy(m.rotation())

        self.x = datatypes.Vector(x.x, x.y, x.z)
        self.y = datatypes.Vector(y.x, y.y, y.z)
        self.z = datatypes.Vector(z.x, z.y, z.z) 

# 需要导入模块: from maya import OpenMaya [as 别名]
# 或者: from maya.OpenMaya import MVector [as 别名]
def getNormals(dag):
    """
    Get the average normal in world space of each vertex on the provided mesh.
    The reason why OpenMaya.MItMeshVertex function has to be used is that the
    MFnMesh class returns incorrect normal results.

    :param OpenMaya.MDagPath dag:
    :return: Normals
    :rtype: list
    """
    # variables
    normals = []

    iter = OpenMaya.MItMeshVertex(dag)
    while not iter.isDone():
        # get normal data
        normal = OpenMaya.MVector()
        iter.getNormal(normal, OpenMaya.MSpace.kWorld)
        normals.append(normal)

        iter.next()

    return normals 

# 需要导入模块: from maya import OpenMaya [as 别名]
# 或者: from maya.OpenMaya import MVector [as 别名]
def closestLineToPoint(lines, point):
    """
    Loop over all lines and find the closest point on the line from the
    provided point. After this is done the list of lines is sorted based on
    closest distance to the line.

    :param dict lines:
    :param OpenMaya.MVector point:
    :return: Closest lines and points ordered on distance
    :rtype: tuple
    """
    # get closest point on the line for each line
    names, closestPoints = zip(
        *[
            (name, api.closestPointOnLine(line[0], line[1], point))
            for name, line in lines.iteritems()
        ]
    )

    # sort the closest points from shortest to longest depending on the
    # distance to the vertex in world space position.
    return api.sortByDistance(names, point, closestPoints) 

# 需要导入模块: from maya import OpenMaya [as 别名]
# 或者: from maya.OpenMaya import MVector [as 别名]
def generate_reflection_curve(self):
        """Generates a curve which helps creating specular at the desired point
        """
        from maya.OpenMaya import MVector
        from anima.env.mayaEnv import auxiliary

        vtx = pm.ls(sl=1)[0]
        normal = vtx.getNormal(space='world')
        panel = auxiliary.Playblaster.get_active_panel()
        camera = pm.PyNode(pm.modelPanel(panel, q=1, cam=1))
        camera_axis = MVector(0, 0, -1) * camera.worldMatrix.get()

        refl = camera_axis - 2 * normal.dot(camera_axis) * normal

        # create a new curve
        p1 = vtx.getPosition(space='world')
        p2 = p1 + refl

        curve = pm.curve(d=1, p=[p1, p2])

        # move pivot to the first point
        pm.xform(curve, rp=p1, sp=p1) 

# 需要导入模块: from maya import OpenMaya [as 别名]
# 或者: from maya.OpenMaya import MVector [as 别名]
def boundingBox(self):
        
        # get the tPositions
        tPositions = self.getTPositions()
        
        # get the multiplier
        size = self.getSize()
        
        # create the bounding box
        bbox = OpenMaya.MBoundingBox()
        
        # add the positions one by one
        numOfTPos = tPositions.length()
        
        #print("numOfTPos in bbox : %s " % numOfTPos)
        
        for i in range(numOfTPos):
            
            # add the positive one
            bbox.expand( OpenMaya.MPoint( tPositions[i] + OpenMaya.MVector(size, size, size) ) )
            
            # add the negative one
            bbox.expand( OpenMaya.MPoint( tPositions[i] - OpenMaya.MVector(size, size, size) ) )
        
        return bbox