diff options
Diffstat (limited to 'silx/gui/plot3d/items/mesh.py')
| -rw-r--r-- | silx/gui/plot3d/items/mesh.py | 396 |
1 files changed, 395 insertions, 1 deletions
diff --git a/silx/gui/plot3d/items/mesh.py b/silx/gui/plot3d/items/mesh.py index 8535728..12a3941 100644 --- a/silx/gui/plot3d/items/mesh.py +++ b/silx/gui/plot3d/items/mesh.py @@ -1,7 +1,7 @@ # coding: utf-8 # /*########################################################################## # -# Copyright (c) 2017 European Synchrotron Radiation Facility +# Copyright (c) 2017-2018 European Synchrotron Radiation Facility # # Permission is hereby granted, free of charge, to any person obtaining a copy # of this software and associated documentation files (the "Software"), to deal @@ -35,6 +35,7 @@ import numpy from ..scene import primitives from .core import DataItem3D, ItemChangedType +from ..scene.transform import Rotate class Mesh(DataItem3D): @@ -143,3 +144,396 @@ class Mesh(DataItem3D): :rtype: str """ return self._mesh.drawMode + + +class _CylindricalVolume(DataItem3D): + """Class that represents a volume with a rotational symmetry along z + + :param parent: The View widget this item belongs to. + """ + + def __init__(self, parent=None): + DataItem3D.__init__(self, parent=parent) + self._mesh = None + + def _setData(self, position, radius, height, angles, color, flatFaces, + rotation): + """Set volume geometry data. + + :param numpy.ndarray position: + Center position (x, y, z) of each volume as (N, 3) array. + :param float radius: External radius ot the volume. + :param float height: Height of the volume(s). + :param numpy.ndarray angles: Angles of the edges. + :param numpy.array color: RGB color of the volume(s). + :param bool flatFaces: + If the volume as flat faces or not. Used for normals calculation. + """ + + self._getScenePrimitive().children = [] # Remove any previous mesh + + if position is None or len(position) == 0: + self._mesh = 0 + else: + volume = numpy.empty(shape=(len(angles) - 1, 12, 3), + dtype=numpy.float32) + normal = numpy.empty(shape=(len(angles) - 1, 12, 3), + dtype=numpy.float32) + + for i in range(0, len(angles) - 1): + """ + c6 + /\ + / \ + / \ + c4|------|c5 + | \ | + | \ | + | \ | + | \ | + c2|------|c3 + \ / + \ / + \/ + c1 + """ + c1 = numpy.array([0, 0, -height/2]) + c1 = rotation.transformPoint(c1) + c2 = numpy.array([radius * numpy.cos(angles[i]), + radius * numpy.sin(angles[i]), + -height/2]) + c2 = rotation.transformPoint(c2) + c3 = numpy.array([radius * numpy.cos(angles[i+1]), + radius * numpy.sin(angles[i+1]), + -height/2]) + c3 = rotation.transformPoint(c3) + c4 = numpy.array([radius * numpy.cos(angles[i]), + radius * numpy.sin(angles[i]), + height/2]) + c4 = rotation.transformPoint(c4) + c5 = numpy.array([radius * numpy.cos(angles[i+1]), + radius * numpy.sin(angles[i+1]), + height/2]) + c5 = rotation.transformPoint(c5) + c6 = numpy.array([0, 0, height/2]) + c6 = rotation.transformPoint(c6) + + volume[i] = numpy.array([c1, c3, c2, + c2, c3, c4, + c3, c5, c4, + c4, c5, c6]) + if flatFaces: + normal[i] = numpy.array([numpy.cross(c3-c1, c2-c1), # c1 + numpy.cross(c2-c3, c1-c3), # c3 + numpy.cross(c1-c2, c3-c2), # c2 + numpy.cross(c3-c2, c4-c2), # c2 + numpy.cross(c4-c3, c2-c3), # c3 + numpy.cross(c2-c4, c3-c4), # c4 + numpy.cross(c5-c3, c4-c3), # c3 + numpy.cross(c4-c5, c3-c5), # c5 + numpy.cross(c3-c4, c5-c4), # c4 + numpy.cross(c5-c4, c6-c4), # c4 + numpy.cross(c6-c5, c5-c5), # c5 + numpy.cross(c4-c6, c5-c6)]) # c6 + else: + normal[i] = numpy.array([numpy.cross(c3-c1, c2-c1), + numpy.cross(c2-c3, c1-c3), + numpy.cross(c1-c2, c3-c2), + c2-c1, c3-c1, c4-c6, # c2 c2 c4 + c3-c1, c5-c6, c4-c6, # c3 c5 c4 + numpy.cross(c5-c4, c6-c4), + numpy.cross(c6-c5, c5-c5), + numpy.cross(c4-c6, c5-c6)]) + + # Multiplication according to the number of positions + vertices = numpy.tile(volume.reshape(-1, 3), (len(position), 1))\ + .reshape((-1, 3)) + normals = numpy.tile(normal.reshape(-1, 3), (len(position), 1))\ + .reshape((-1, 3)) + + # Translations + numpy.add(vertices, numpy.tile(position, (1, (len(angles)-1) * 12)) + .reshape((-1, 3)), out=vertices) + + # Colors + if numpy.ndim(color) == 2: + color = numpy.tile(color, (1, 12 * (len(angles) - 1)))\ + .reshape(-1, 3) + + self._mesh = primitives.Mesh3D( + vertices, color, normals, mode='triangles', copy=False) + self._getScenePrimitive().children.append(self._mesh) + + self.sigItemChanged.emit(ItemChangedType.DATA) + + +class Box(_CylindricalVolume): + """Description of a box. + + Can be used to draw one box or many similar boxes. + + :param parent: The View widget this item belongs to. + """ + + def __init__(self, parent=None): + super(Box, self).__init__(parent) + self.position = None + self.size = None + self.color = None + self.rotation = None + self.setData() + + def setData(self, size=(1, 1, 1), color=(1, 1, 1), + position=(0, 0, 0), rotation=(0, (0, 0, 0))): + """ + Set Box geometry data. + + :param numpy.array size: Size (dx, dy, dz) of the box(es). + :param numpy.array color: RGB color of the box(es). + :param numpy.ndarray position: + Center position (x, y, z) of each box as a (N, 3) array. + :param tuple(float, array) rotation: + Angle (in degrees) and axis of rotation. + If (0, (0, 0, 0)) (default), the hexagonal faces are on + xy plane and a side face is aligned with x axis. + """ + self.position = numpy.atleast_2d(numpy.array(position, copy=True)) + self.size = numpy.array(size, copy=True) + self.color = numpy.array(color, copy=True) + self.rotation = Rotate(rotation[0], + rotation[1][0], rotation[1][1], rotation[1][2]) + + assert (numpy.ndim(self.color) == 1 or + len(self.color) == len(self.position)) + + diagonal = numpy.sqrt(self.size[0]**2 + self.size[1]**2) + alpha = 2 * numpy.arcsin(self.size[1] / diagonal) + beta = 2 * numpy.arcsin(self.size[0] / diagonal) + angles = numpy.array([0, + alpha, + alpha + beta, + alpha + beta + alpha, + 2 * numpy.pi]) + numpy.subtract(angles, 0.5 * alpha, out=angles) + self._setData(self.position, + numpy.sqrt(self.size[0]**2 + self.size[1]**2)/2, + self.size[2], + angles, + self.color, + True, + self.rotation) + + def getPosition(self, copy=True): + """Get box(es) position(s). + + :param bool copy: + True (default) to get a copy, + False to get internal representation (do not modify!). + :return: Position of the box(es) as a (N, 3) array. + :rtype: numpy.ndarray + """ + return numpy.array(self.position, copy=copy) + + def getSize(self): + """Get box(es) size. + + :return: Size (dx, dy, dz) of the box(es). + :rtype: numpy.ndarray + """ + return numpy.array(self.size, copy=True) + + def getColor(self, copy=True): + """Get box(es) color. + + :param bool copy: + True (default) to get a copy, + False to get internal representation (do not modify!). + :return: RGB color of the box(es). + :rtype: numpy.ndarray + """ + return numpy.array(self.color, copy=copy) + + +class Cylinder(_CylindricalVolume): + """Description of a cylinder. + + Can be used to draw one cylinder or many similar cylinders. + + :param parent: The View widget this item belongs to. + """ + + def __init__(self, parent=None): + super(Cylinder, self).__init__(parent) + self.position = None + self.radius = None + self.height = None + self.color = None + self.nbFaces = 0 + self.rotation = None + self.setData() + + def setData(self, radius=1, height=1, color=(1, 1, 1), nbFaces=20, + position=(0, 0, 0), rotation=(0, (0, 0, 0))): + """ + Set the cylinder geometry data + + :param float radius: Radius of the cylinder(s). + :param float height: Height of the cylinder(s). + :param numpy.array color: RGB color of the cylinder(s). + :param int nbFaces: + Number of faces for cylinder approximation (default 20). + :param numpy.ndarray position: + Center position (x, y, z) of each cylinder as a (N, 3) array. + :param tuple(float, array) rotation: + Angle (in degrees) and axis of rotation. + If (0, (0, 0, 0)) (default), the hexagonal faces are on + xy plane and a side face is aligned with x axis. + """ + self.position = numpy.atleast_2d(numpy.array(position, copy=True)) + self.radius = float(radius) + self.height = float(height) + self.color = numpy.array(color, copy=True) + self.nbFaces = int(nbFaces) + self.rotation = Rotate(rotation[0], + rotation[1][0], rotation[1][1], rotation[1][2]) + + assert (numpy.ndim(self.color) == 1 or + len(self.color) == len(self.position)) + + angles = numpy.linspace(0, 2*numpy.pi, self.nbFaces + 1) + self._setData(self.position, + self.radius, + self.height, + angles, + self.color, + False, + self.rotation) + + def getPosition(self, copy=True): + """Get cylinder(s) position(s). + + :param bool copy: + True (default) to get a copy, + False to get internal representation (do not modify!). + :return: Position(s) of the cylinder(s) as a (N, 3) array. + :rtype: numpy.ndarray + """ + return numpy.array(self.position, copy=copy) + + def getRadius(self): + """Get cylinder(s) radius. + + :return: Radius of the cylinder(s). + :rtype: float + """ + return self.radius + + def getHeight(self): + """Get cylinder(s) height. + + :return: Height of the cylinder(s). + :rtype: float + """ + return self.height + + def getColor(self, copy=True): + """Get cylinder(s) color. + + :param bool copy: + True (default) to get a copy, + False to get internal representation (do not modify!). + :return: RGB color of the cylinder(s). + :rtype: numpy.ndarray + """ + return numpy.array(self.color, copy=copy) + + +class Hexagon(_CylindricalVolume): + """Description of a uniform hexagonal prism. + + Can be used to draw one hexagonal prim or many similar hexagonal + prisms. + + :param parent: The View widget this item belongs to. + """ + + def __init__(self, parent=None): + super(Hexagon, self).__init__(parent) + self.position = None + self.radius = 0 + self.height = 0 + self.color = None + self.rotation = None + self.setData() + + def setData(self, radius=1, height=1, color=(1, 1, 1), + position=(0, 0, 0), rotation=(0, (0, 0, 0))): + """ + Set the uniform hexagonal prism geometry data + + :param float radius: External radius of the hexagonal prism + :param float height: Height of the hexagonal prism + :param numpy.array color: RGB color of the prism(s) + :param numpy.ndarray position: + Center position (x, y, z) of each prism as a (N, 3) array + :param tuple(float, array) rotation: + Angle (in degrees) and axis of rotation. + If (0, (0, 0, 0)) (default), the hexagonal faces are on + xy plane and a side face is aligned with x axis. + """ + self.position = numpy.atleast_2d(numpy.array(position, copy=True)) + self.radius = float(radius) + self.height = float(height) + self.color = numpy.array(color, copy=True) + self.rotation = Rotate(rotation[0], rotation[1][0], rotation[1][1], + rotation[1][2]) + + assert (numpy.ndim(self.color) == 1 or + len(self.color) == len(self.position)) + + angles = numpy.linspace(0, 2*numpy.pi, 7) + self._setData(self.position, + self.radius, + self.height, + angles, + self.color, + True, + self.rotation) + + def getPosition(self, copy=True): + """Get hexagonal prim(s) position(s). + + :param bool copy: + True (default) to get a copy, + False to get internal representation (do not modify!). + :return: Position(s) of hexagonal prism(s) as a (N, 3) array. + :rtype: numpy.ndarray + """ + return numpy.array(self.position, copy=copy) + + def getRadius(self): + """Get hexagonal prism(s) radius. + + :return: Radius of hexagon(s). + :rtype: float + """ + return self.radius + + def getHeight(self): + """Get hexagonal prism(s) height. + + :return: Height of hexagonal prism(s). + :rtype: float + """ + return self.height + + def getColor(self, copy=True): + """Get hexagonal prism(s) color. + + :param bool copy: + True (default) to get a copy, + False to get internal representation (do not modify!). + :return: RGB color of the hexagonal prism(s). + :rtype: numpy.ndarray + """ + return numpy.array(self.color, copy=copy) |