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Graphics.Rendering.Diagrams.Shapes | Portability | portable | Stability | experimental | Maintainer | byorgey@gmail.com |
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Description |
Primitive shapes out of which Diagrams can be built, implemented
via instances of ShapeClass.
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Synopsis |
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Documentation |
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circle r is a circle with radius r.
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arc r a1 a2 is a circular arc with radius r, starting at
angle a1*2*pi and proceeding in a direction of increasing angle
to a2*2*pi.
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regPolyPath n r is an open path corresponding to a regular
polygon, with the first vertex oriented along the positive
x-axis and proceeding clockwise.
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regPoly n r is a regular n-gon, with a circumcircle of radius
r. One vertex is oriented along the positive x-axis.
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rotRegPoly n r a is the same as regPoly n r but rotated
through an angle of a*2*pi radians (i.e., a represents a
fraction of an entire revolution). This is different than
rotate a $ regPoly n r; rotRegPoly will adjust the
bounding box correctly (using rotPath), whereas the
construction using rotate will still have a bounding box
corresponding to the unrotated polygon.
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rect w h is a rectangle of width w and height h.
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rectPath w h is a closed path describing a rectangle of width
w and height h.
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roundRect w h is a rectangle of width w and height h with
rounded corners having a radius one third the length of the
shortest edge.
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roundRect w h f is a rectangle of width w and height h with
rounded corners having a radius f times the length of the
shortest edge.
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straight creates a Diagram from a path, by drawing straight
lines along the path edges.
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curved d p is a curved path which follows generally the path
p. The parameter d specifies the amount of corner rounding.
In particular, d should be a value between 0 and 1, which
specifies what fraction of the path segments should be rounded
off with bezier curves, using the path vertices as control
points. Thus d = 0 produces the polygonal path itself, with no
curved segments; d = 1 produces a continuously curving path
tangent to the midpoints of the path segments; and intermediate
values of d interpolate between the two. The curved path
produced will be everywhere differentiable as long as d > 0.
If the path is not closed, the curve will begin and end at the
first and last path vertices (no rounding will take place at
these vertices).
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textPath s t is a string of text t at size s,
represented as an outline with separate stroke and fill.
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rawCairo s r is a diagram with bounding box size s, rendered
by executing Cairo Render action r. Import
Graphics.Rendering.Cairo to access Cairo operations.
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Produced by Haddock version 2.6.1 |