2.5 Bounding Box Adjusters

► |  | Slideshow: Figure and Presentation Tools

1 | Creating Slide Presentations
2 | Making Pictures
3 | Making Slides
4 | Typesetting Racket Code
5 | Animations
| Bibliography
| Index

▼ | 2 | Making Pictures

2.1 | Pict Datatype
2.2 | Basic Pict Constructors
2.3 | Pict Combiners
2.4 | Pict Drawing Adjusters
2.5 | Bounding Box Adjusters
2.6 | Pict Finders
2.7 | More Pict Constructors
2.8 | Miscellaneous
2.9 | Rendering
2.10 | Conversion to Picts

On this page:

inset
clip-descent
lift-above-baseline
drop-below-ascent
baseless
refocus
panorama
use-last
use-last*

top ← prev up next →

#### 2.5`` Bounding Box Adjusters

> procedure (inset pict amt) → pict?
> pict : pict?
> amt : real?
> (inset pict h-amt v-amt) → pict?
> pict : pict?
> h-amt : real?
> v-amt : real?
> (inset pict l-amt t-amt r-amt b-amt) → pict?
> pict : pict?
> l-amt : real?
> t-amt : real?
> r-amt : real?
> b-amt : real?

Extends pict’s bounding box by adding the given amounts to the corresponding sides; ascent and descent are extended, too.

> procedure (clip-descent pict) → pict?
> pict : pict?

Truncates pict’s bounding box by removing the descent part.

> procedure (lift-above-baseline pict amt) → pict?
> pict : pict?
> amt : real?

Lifts pict relative to its baseline, extending the bounding box height if necessary.

> procedure (drop-below-ascent pict amt) → pict?
> pict : pict?
> amt : real?

Drops pict relative to its ascent line, extending the bounding box height if necessary.

> procedure (baseless pict) → pict?
> pict : pict?

Makes the descent 0 and the ascent the same as the height.

> procedure (refocus pict sub-pict) → pict?
> pict : pict?
> sub-pict : pict?

Assuming that sub-pict can be found within pict, shifts the overall bounding box to that of sub-pict (but preserving all the drawing of pict). The last element, as reported by pict-last is also set to (or (pict-last sub-pict) sub-pict).

> procedure (panorama pict) → pict?
> pict : pict?

Shifts the given pict’s bounding box to enclose the bounding boxes of all sub-picts (even laundered picts).

> procedure (use-last pict sub-pict) → pict?
> pict : pict?
> sub-pict : pict-path?

Returns a pict like pict, but with the last element (as reported by pict-last) set to sub-pict. The sub-pict must exist as a sub-pict (or path of sub-picts) within pict.

> procedure (use-last* pict sub-pict) → pict?
> pict : pict?
> sub-pict : pict-path?

Propagates the last element of sub-pict to pict.

That is, use-last* is like use-last, but the last element of sub-pict is used as the new last element for pict, instead of sub-pict itself—unless (pict-last sub-pict) is #f, in which case sub-pict is used as the last element of pict.

top ← prev up next →