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Vector Nodes
============
.. automodule:: libavg.avg
:no-members:
.. inheritance-diagram:: CircleNode CurveNode FilledVectorNode LineNode MeshNode Node PolygonNode PolyLineNode RectNode VectorNode libavg.geom.Arc libavg.geom.PieSlice libavg.geom.RoundedRect
:parts: 1
.. autoclass:: CircleNode([r=1, texcoord1=0, texcoord2=1])
A circle. The reference point for a circle is its center.
.. py:attribute:: r
The radius of the circle in pixels.
.. py:attribute:: texcoord1
.. py:attribute:: texcoord2
.. autoclass:: CurveNode([pos1, pos2, pos3, pos4, texcoord1, texcoord2])
A cubic bezier curve (`<http://en.wikipedia.org/wiki/Bezier_curve>`_).
:py:attr:`pos1` and :py:attr:`pos4` are the two endpoints of the curve.
:py:attr:`pos2` and :py:attr:`pos3` are control points.
.. py:method:: getPtOnCurve(t) -> pos
Returns a point on the curve. Which point is determined by the value of t.
If :samp:`t=0`, returns :py:attr:`pos1`. :samp:`t=1` returns :py:attr:`pos4`,
and values in between return the points in between.
.. py:attribute:: length
Returns an approximation of the length of the curve (ro).
.. py:attribute:: pos1
.. py:attribute:: pos2
.. py:attribute:: pos3
.. py:attribute:: pos4
.. py:attribute:: texcoord1
.. py:attribute:: texcoord2
.. autoclass:: FilledVectorNode([filltexhref, fillopacity=0, fillcolor="FFFFFF", filltexcoord1=Point2D(0,0), filltexcoord2=Point2D(1,1)])
Base class for vector nodes which have a filled area and a border. The area can
be filled either with a solid color (:py:attr:`fillcolor`) or with a texture
loaded from a file (:py:attr:`filltexhref`) or taken from a bitmap object
(:py:meth:`setFillBitmap`).
.. py:attribute:: fillcolor
.. py:attribute:: fillopacity
.. py:attribute:: filltexcoord1
.. py:attribute:: filltexcoord2
.. py:attribute:: filltexhref
An image file to use as a texture for the area of the node.
.. py:method:: setFillBitmap(bitmap)
Sets a bitmap to use as a fill texture. Sets :attr:`filltexhref` to an empty
string.
.. autoclass:: LineNode([pos1, pos2, texcoord1, texcoord2])
A line. :py:attr:`pos1` and :py:attr:`pos2` are the two endpoints of the line.
.. py:attribute:: pos1
.. py:attribute:: pos2
.. py:attribute:: texcoord1
.. py:attribute:: texcoord2
.. autoclass:: MeshNode([vertexcoords, texcoords, triangles])
This is a generalized mesh of textured triangles. See
https://www.libavg.de/wiki/ProgrammersGuide/MeshNode for an example.
.. py:attribute:: texcoords
.. py:attribute:: triangles
.. py:attribute:: vertexcoords
.. autoclass:: PolygonNode([linejoin="bevel", pos, texcoords])
A closed figure bounded by a number of line segments, optionally filled. Filled
polygons may not be self-intersecting.
.. py:attribute:: linejoin
The method by which line segments are joined together. Valid values are
:py:const:`bevel` and :py:const:`miter`.
.. py:attribute:: pos
A sequence (:py:class:`list` or :py:class:`tuple`) of pixel positions.
.. py:attribute:: texcoords
A sequence of float texture coordinates corresponding to the border positions.
.. autoclass:: PolyLineNode([linejoin="bevel", pos, texcoords])
A figure similar to a :py:class:`PolygonNode`, but not closed and never filled.
.. py:attribute:: linejoin
The method by which line segments are joined together. Valid values are
:py:const:`bevel` and :py:const:`miter`.
.. py:attribute:: pos
A sequence (:py:class:`list` or :py:class:`tuple`) of pixel positions.
.. py:attribute:: texcoords
A sequence of float texture coordinates corresponding to the border positions.
.. autoclass:: RectNode([pos, size, angle])
A rectangle that can be filled.
.. py:attribute:: angle
The angle that the rectangle is rotated to in radians. 0 is
unchanged, 3.14 is upside-down. The rectangle is rotated around its
center.
.. py:attribute:: pos
The position of the top left corner of the rectangle.
.. py:attribute:: size
.. py:attribute:: texcoords
.. autoclass:: VectorNode([color="FFFFFF", strokewidth=1, texhref, blendmode="blend"])
Base class for all nodes that draw geometrical primitives. All vector nodes
support configurable stroke width. Strokes can be filled either with a solid
color (:py:attr:`color`) or with a texture loaded from a file
(:py:attr:`texhref`) or taken from a bitmap object (:py:meth:`setBitmap`).
.. py:attribute:: blendmode
The method of compositing the node with the nodes under
it. Valid values are :py:const:`blend`, :py:const:`add`, :py:const:`min`
and :py:const:`max`. For :py:const:`min` and :py:const:`max`
blend modes, opacity is ignored.
.. py:attribute:: color
The color of the strokes in standard html color notation:
:samp:`"FF0000"` is red, :samp:`"00FF00"` green, etc.
.. py:attribute:: strokewidth
The width of the strokes in the vector. For lines, this is the line
width. For rectangles, it is the width of the outline, etc.
.. py:attribute:: texhref
An image file to use as a texture for the node.
.. py:method:: setBitmap(bitmap)
Sets a bitmap to use as a texture. Sets :attr:`texhref` to an empty
string.
.. automodule:: libavg.geom
:no-members:
.. autoclass:: Arc(radius, startangle, endangle[, pos=(0,0)])
An unfilled arc (incomplete circle) from :py:attr:`startangle` to
:py:attr:`endangle`. :py:attr:`pos` is the center of the circle.
.. py:attribute:: endangle
.. py:attribute:: pos
.. py:attribute:: radius
.. py:attribute:: startangle
.. autoclass:: PieSlice(radius, startangle, endangle[, pos=(0,0)])
An arc (incomplete circle) from :py:attr:`startangle` to
:py:attr:`endangle` connected to the center of the circle. :py:attr:`pos` is the
center of the circle. A :py:class:`PieSlice` can be filled.
.. py:attribute:: endangle
.. py:attribute:: pos
.. py:attribute:: radius
.. py:attribute:: startangle
.. autoclass:: RoundedRect(size, radius, pos)
A rectangle with rounded corners. :py:attr:`radius` is the corner radius.
.. py:attribute:: pos
.. py:attribute:: radius
.. py:attribute:: size
|
