Python monitorunittools.convertToPix函数代码示例

 def _updateVertices(self):
     """
     """
     #then combine with position and convert to pix
     pos = convertToPix(vertices = [0,0], pos = self.pos, units=self.units, win=self.win)
     size = convertToPix(vertices = self.size, pos = 0, units=self.units, win=self.win)
     try:
         size=size[0]
     except:
         pass
     #assign to self attrbute
     self.__dict__['posPix'] = pos
     self.__dict__['sizePix'] = size
     self._needVertexUpdate = False

    def _updateVertices(self):
        """Sets Stim.verticesPix from fieldPos and
        """

        #Handle the orientation, size and location of each element in native units
        #
        radians = 0.017453292519943295
        verts = numpy.zeros([self.nElements*4, 3],'d')
        #rotate 'width' and 'height' and find their effects on X and Y
        wx = -self.sizes[:,0]*numpy.cos(self.oris[:]*radians)/2
        wy = self.sizes[:,0]*numpy.sin(self.oris[:]*radians)/2
        hx = self.sizes[:,1]*numpy.sin(self.oris[:]*radians)/2
        hy = self.sizes[:,1]*numpy.cos(self.oris[:]*radians)/2
        #X
        verts[0::4,0] = + wx + hx#TopR
        verts[1::4,0] = - wx + hx#TopL
        verts[2::4,0] = - wx - hx#BotL
        verts[3::4,0] = + wx - hx#BotR
        #Y
        verts[0::4,1] = + wy + hy
        verts[1::4,1] = - wy + hy
        verts[2::4,1] = - wy - hy
        verts[3::4,1] = + wy - hy
        #Z
        verts[:,2] = 1#self.depths + self.fieldDepth
        #Now shift by fieldPos and convert to appropriate units
        pos = numpy.tile(self.xys+self.fieldPos, (1,4)).reshape([self.nElements*4,2])
        verts[:,:2] = convertToPix(vertices = verts[:,:2], pos = pos, units=self.units, win = self.win)
        #assign to self attrbute
        self.__dict__['verticesPix'] = numpy.require(verts,requirements=['C'])#make sure it's contiguous
        self._needVertexUpdate = False

 def posPix(self):
     """This determines the coordinates in pixels of the position for the
     current stimulus, accounting for pos and units. This property should
     automatically update if `pos` is changed"""
     #because this is a property getter we can check /on-access/ if it needs updating :-)
     if self._needVertexUpdate:
         self.__dict__['posPix'] = convertToPix(vertices = [0,0], pos = self.pos, units=self.units, win = self.win)
     self._needVertexUpdate = False
     return self.__dict__['posPix']

 def setHeight(self,height, log=True):
     """Set the height of the letters (including the entire box that surrounds the letters
     in the font). The width of the letters is then defined by the font.
     """
     self.heightPix = convertToPix(pos = numpy.array([0,0]),
                                   vertices=numpy.array([0,height]),
                                   units=self.units, win=self.win)[1]
     #need to update the font to reflect the change
     self.setFont(self.fontname, log=False)
     logAttrib(self, log, 'height', height)

 def setHeight(self, height, log=True):
     """Set the height of the letters (including the entire box that surrounds the letters
     in the font). The width of the letters is then defined by the font.
     """
     self.heightPix = convertToPix(
         pos=numpy.array([0, 0]), vertices=numpy.array([0, height]), units=self.units, win=self.win
     )[1]
     # need to update the font to reflect the change
     self.setFont(self.fontname, log=False)
     if log and self.autoLog:
         self.win.logOnFlip("Set %s height=%.2f" % (self.name, height), level=logging.EXP, obj=self)

    def wrapWidth(self, wrapWidth):
        """Int/float or None (set default).
        The width the text should run before wrapping.

        :ref:`Operations <attrib-operations>` supported."""
        if wrapWidth is None:
            if self.units in defaultWrapWidth:
                wrapWidth = defaultWrapWidth[self.units]
            else:
                raise AttributeError, "TextStim does now know a default wrap width for units %s" %(repr(self.units))
        self.__dict__['wrapWidth'] = wrapWidth
        self._wrapWidthPix = convertToPix(pos = numpy.array([0, 0]), vertices=numpy.array([self.wrapWidth, 0]), units=self.units, win=self.win)[0]
        self._needSetText = True

    def height(self, height):
        """Float/int or None (set default).
        The height of the letters (including the entire box that surrounds the letters
        in the font). The width of the letters is then defined by the font.

        :ref:`Operations <attrib-operations>` supported."""
        #height in pix (needs to be done after units which is done during _Base.__init__)
        if height is None:
            if self.units in defaultLetterHeight:
                height = defaultLetterHeight[self.units]
            else:
                raise AttributeError, "TextStim does now know a default letter height for units %s" %(repr(self.units))
        self.__dict__['height'] = height
        self._heightPix = convertToPix(pos = numpy.array([0, 0]), vertices=numpy.array([0, self.height]), units=self.units, win=self.win)[1]

        #need to update the font to reflect the change
        self.setFont(self.font, log=False)

    def _updateVertices(self):
        """Sets Stim.verticesPix from fieldPos.
        """

        # Handle the orientation, size and location of
        # each element in native units

        radians = 0.017453292519943295

        # so we can do matrix rotation of coords we need shape=[n*4,3]
        # but we'll convert to [n,4,3] after matrix math
        verts = numpy.zeros([self.nElements * 4, 3], 'd')
        wx = -self.sizes[:, 0] * numpy.cos(self.oris[:] * radians) / 2
        wy = self.sizes[:, 0] * numpy.sin(self.oris[:] * radians) / 2
        hx = self.sizes[:, 1] * numpy.sin(self.oris[:] * radians) / 2
        hy = self.sizes[:, 1] * numpy.cos(self.oris[:] * radians) / 2

        # X vals of each vertex relative to the element's centroid
        verts[0::4, 0] = -wx - hx
        verts[1::4, 0] = +wx - hx
        verts[2::4, 0] = +wx + hx
        verts[3::4, 0] = -wx + hx

        # Y vals of each vertex relative to the element's centroid
        verts[0::4, 1] = -wy - hy
        verts[1::4, 1] = +wy - hy
        verts[2::4, 1] = +wy + hy
        verts[3::4, 1] = -wy + hy

        # set of positions across elements
        positions = self.xys + self.fieldPos

        # depth
        verts[:, 2] = self.depths + self.fieldDepth
        # rotate, translate, scale by units
        if positions.shape[0] * 4 == verts.shape[0]:
            positions = positions.repeat(4, 0)
        verts[:, :2] = convertToPix(vertices=verts[:, :2], pos=positions,
                                    units=self.units, win=self.win)
        verts = verts.reshape([self.nElements, 4, 3])

        # assign to self attribute; make sure it's contiguous
        self.__dict__['verticesPix'] = numpy.require(verts,
                                                     requirements=['C'])
        self._needVertexUpdate = False

    def contains(self, x, y=None, units=None):
        """Determines if a point x,y is inside the extent of the stimulus.

        Can accept variety of input options:
            + two separate args, x and y
            + one arg (list, tuple or array) containing two vals (x,y)
            + an object with a getPos() method that returns x,y, such
                as a :class:`~psychopy.event.Mouse`. Returns `True` if the point is
                within the area defined by `vertices`.

        This method handles complex shapes, including concavities and self-crossings.

        Note that, if your stimulus uses a mask (such as a Gaussian blob) then
        this is not accounted for by the `contains` method; the extent of the
        stmulus is determined purely by the size, pos and orientation settings
        (and by the vertices for shape stimuli).

        See coder demo, shapeContains.py
        """
        #get the object in pixels
        if hasattr(x, 'verticesPix'):
            xy = x.verticesPix #access only once - this is a property (slower to access)
            units = 'pix' #we can forget about the units
        elif hasattr(x, 'getPos'):
            xy = x.getPos()
            units = x.units
        elif type(x) in [list, tuple, numpy.ndarray]:
            xy = numpy.array(x)
        else:
            xy = numpy.array((x,y))
        #try to work out what units x,y has
        if units is None:
            if hasattr(xy, 'units'):
                units = xy.units
            else:
                units = self.units
        if units != 'pix':
            xy = convertToPix(xy, pos=0, units=units, win=self.win)
        # ourself in pixels
        selfVerts = self.verticesPix
        return pointInPolygon(xy[0], xy[1], poly = selfVerts)

 def _updateVertices(self):
     """Sets Stim.verticesPix from pos and size
     """
     if hasattr(self, 'vertices'):
         verts = self.vertices
     else:
         verts = self._verticesBase
     #check wheher stimulus needs flipping in either direction
     flip = numpy.array([1,1])
     if hasattr(self, 'flipHoriz'):
         flip[0] = self.flipHoriz*(-2)+1#True=(-1), False->(+1)
     if hasattr(self, 'flipVert'):
         flip[1] = self.flipVert*(-2)+1#True=(-1), False->(+1)
     # set size and orientation
     verts = numpy.dot(self.size*verts*flip, self._rotationMatrix)
     #then combine with position and convert to pix
     verts = convertToPix(vertices=verts, pos=self.pos, win=self.win, units=self.units)
     #assign to self attrbute
     self.__dict__['verticesPix'] = verts
     self._needVertexUpdate = False
     self._needUpdate = True #but we presumably need to update the list

 def _calcPosRendered(self):
     """Calculate the pos of the stimulus in pixels"""
     self._posRendered = convertToPix(pos=self.pos,
                                      vertices=numpy.array([0, 0]),
                                      units=self.units, win=self.win)

    def __init__(self, win,
                 text="Hello World",
                 font="",
                 pos=(0.0,0.0),
                 depth=0,
                 rgb=None,
                 color=(1.0,1.0,1.0),
                 colorSpace='rgb',
                 opacity=1.0,
                 contrast=1.0,
                 units="",
                 ori=0.0,
                 height=None,
                 antialias=True,
                 bold=False,
                 italic=False,
                 alignHoriz='center',
                 alignVert='center',
                 fontFiles=[],
                 wrapWidth=None,
                 flipHoriz=False, flipVert=False,
                 name='', autoLog=True):
        """
        :Parameters:
            win: A :class:`Window` object.
                Required - the stimulus must know where to draw itself
            text:
                The text to be rendered
            height:
                Height of the characters (including the ascent of the letter and the descent)
            antialias:
                boolean to allow (or not) antialiasing the text
            bold:
                Make the text bold (better to use a bold font name)
            italic:
                Make the text italic (better to use an actual italic font)
            alignHoriz:
                The horizontal alignment ('left', 'right' or 'center')
            alignVert:
                The vertical alignment ('top', 'bottom' or 'center')
            fontFiles:
                A list of additional files if the font is not in the standard system location (include the full path)
            wrapWidth:
                The width the text should run before wrapping
            flipHoriz : boolean
                Mirror-reverse the text in the left-right direction
            flipVert : boolean
                Mirror-reverse the text in the up-down direction
        """

        #what local vars are defined (these are the init params) for use by __repr__
        self._initParams = dir()
        self._initParams.remove('self')

        super(TextStim, self).__init__(win, units=units, name=name, autoLog=False)

        self.useShaders = win._haveShaders  #use shaders if available by default, this is a good thing
        self._needUpdate = True
        self.alignHoriz = alignHoriz
        self.alignVert = alignVert
        self.antialias = antialias
        self.bold=bold
        self.italic=italic
        self.text='' #NB just a placeholder - real value set below
        self.depth=depth
        self.ori=ori
        self.flipHoriz = flipHoriz
        self.flipVert = flipVert
        self._pygletTextObj=None

        self.pos= numpy.array(pos, float)

        #height in pix (needs to be done after units which is done during _Base.__init__)
        if height==None:
            if self.units in defaultLetterHeight:
                height = defaultLetterHeight[self.units]
            else:
                raise AttributeError, "TextStim does now know a default letter height for units %s" %(repr(self.units))
        if wrapWidth==None:
            if self.units in defaultWrapWidth:
                wrapWidth = defaultWrapWidth[self.units]
            else:
                raise AttributeError, "TextStim does now know a default wrap width for units %s" %(repr(self.units))

        #treat letter height and wrapWidth as vertices (in degFlatPos they should not be 'corrected')
        wh = convertToPix(pos = numpy.array([0,0]), vertices=numpy.array([wrapWidth,height]), units=self.units, win=self.win)
        self._wrapWidthPix, self.heightPix = wh
        #generate the texture and list holders
        self._listID = GL.glGenLists(1)
        if not self.win.winType=="pyglet":#pygame text needs a surface to render to
            self._texID = GL.GLuint()
            GL.glGenTextures(1, ctypes.byref(self._texID))

        self.colorSpace=colorSpace
        if rgb!=None:
            logging.warning("Use of rgb arguments to stimuli are deprecated. Please use color and colorSpace args instead")
            self.setColor(rgb, colorSpace='rgb', log=False)
        else:
            self.setColor(color, log=False)

#.........这里部分代码省略.........