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objects.js
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objects.js
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/*
objects.js
a scriptable microworld
based on morphic.js, blocks.js and threads.js
inspired by Scratch
written by Jens Mönig
jens@moenig.org
Copyright (C) 2024 by Jens Mönig
This file is part of Snap!.
Snap! is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as
published by the Free Software Foundation, either version 3 of
the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
prerequisites:
--------------
needs blocks.js, threads.js, morphic.js and widgets.js
toc
---
the following list shows the order in which all constructors are
defined. Use this list to locate code in this document:
SpriteMorph
SpriteHighlightMorph
StageMorph
Costume
SVG_Costume
CostumeEditorMorph
Sound
Note
Microphone
CellMorph
WatcherMorph
StagePrompterMorph
StagePickerMorph
StagePickerItemMorph
MenuItemMorph*
StagePickerItemMorph
MenuMorph*
StagePickerMorph
SpeechBubbleMorph*
SpriteBubbleMorph
StageBubbleMorph
* defined in Morphic.js
credits
-------
Ian Reynolds contributed initial porting of primitives from Squeak and
sound handling
Achal Dave contributed research and prototyping for creating music
using the Web Audio API
Yuan Yuan and Deborah Servilla contributed graphic effects for costumes
*/
// Global stuff ////////////////////////////////////////////////////////
/*global PaintEditorMorph, ListWatcherMorph, PushButtonMorph, ToggleMorph, ZERO,
DialogBoxMorph, InputFieldMorph, SpriteIconMorph, BlockMorph, SymbolMorph, nop,
ThreadManager, VariableFrame, detect, BlockMorph, BoxMorph, Color, Animation,
CommandBlockMorph, FrameMorph, HatBlockMorph, MenuMorph, Morph, MultiArgMorph,
ReporterBlockMorph, ScriptsMorph, StringMorph, SyntaxElementMorph, XML_Element,
TextMorph, contains, degrees, detect, newCanvas, radians, Array, CursorMorph,
Date, FrameMorph, Math, MenuMorph, Morph, invoke, MorphicPreferences, WHITE,
Object, PenMorph, Point, Rectangle, ScrollFrameMorph, SliderMorph, VideoMotion,
StringMorph, TextMorph, contains, copy, degrees, detect, document, isNaN, Point,
isString, newCanvas, nop, parseFloat, radians, window, modules, IDE_Morph,
VariableDialogMorph, HTMLCanvasElement, Context, List, RingMorph, HandleMorph,
SpeechBubbleMorph, InputSlotMorph, isNil, FileReader, TableDialogMorph, String,
BlockEditorMorph, BlockDialogMorph, PrototypeHatBlockMorph, BooleanSlotMorph,
localize, TableMorph, TableFrameMorph, normalizeCanvas, VectorPaintEditorMorph,
AlignmentMorph, Process, WorldMap, copyCanvas, useBlurredShadows, BLACK,
BlockVisibilityDialogMorph, CostumeIconMorph, SoundIconMorph, MenuItemMorph,
embedMetadataPNG, SnapExtensions, SnapSerializer, snapEquals, display,
CustomBlockDefinition, exportEmbroidery, CustomHatBlockMorph*/
/*jshint esversion: 11*/
modules.objects = '2024-December-04';
var SpriteMorph;
var StageMorph;
var SpriteBubbleMorph;
var StageBubbleMorph;
var Costume;
var SVG_Costume;
var CostumeEditorMorph;
var Sound;
var Note;
var Microphone;
var CellMorph;
var WatcherMorph;
var StagePrompterMorph;
var Note;
var SpriteHighlightMorph;
var StagePickerMorph;
var StagePickerItemMorph;
function isSnapObject(thing) {
return thing instanceof SpriteMorph || (thing instanceof StageMorph);
}
// SpriteMorph /////////////////////////////////////////////////////////
// I am a scriptable object
// SpriteMorph inherits from PenMorph:
SpriteMorph.prototype = new PenMorph();
SpriteMorph.prototype.constructor = SpriteMorph;
SpriteMorph.uber = PenMorph.prototype;
// SpriteMorph settings
SpriteMorph.prototype.attributes =
[
'x position',
'y position',
'direction',
'size',
'costumes',
'costume #',
'volume',
'balance',
'sounds',
'shown?',
'pen down?',
'scripts'
];
SpriteMorph.prototype.categories =
[
'motion',
'looks',
'sound',
'pen',
'control',
'sensing',
'operators',
'variables',
'lists',
'other'
];
SpriteMorph.prototype.blockColor = {
motion : new Color(74, 108, 212),
looks : new Color(143, 86, 227),
sound : new Color(207, 74, 217),
pen : new Color(0, 161, 120),
control : new Color(230, 168, 34),
sensing : new Color(4, 148, 220),
operators : new Color(98, 194, 19),
variables : new Color(243, 118, 29),
lists : new Color(217, 77, 17),
other: new Color(150, 150, 150)
};
SpriteMorph.prototype.customCategories = new Map(); // key: name, value: color
SpriteMorph.prototype.allCategories = function () {
return this.categories.concat(
Array.from(this.customCategories.keys()).sort()
);
};
SpriteMorph.prototype.blockColorFor = function (category) {
return Object.hasOwn(this.blockColor, category) ? this.blockColor[category]
: this.customCategories.get(category) || this.blockColor.other;
};
SpriteMorph.prototype.paletteColor = new Color(55, 55, 55);
SpriteMorph.prototype.paletteTextColor = new Color(230, 230, 230);
SpriteMorph.prototype.sliderColor
= SpriteMorph.prototype.paletteColor.lighter(30);
SpriteMorph.prototype.isCachingPrimitives = true;
SpriteMorph.prototype.enableNesting = true;
SpriteMorph.prototype.enableFirstClass = true;
SpriteMorph.prototype.showingExtensions = false;
SpriteMorph.prototype.useFlatLineEnds = false;
SpriteMorph.prototype.penColorModel = 'hsv'; // or 'hsl'
SpriteMorph.prototype.disableDraggingData = false;
SpriteMorph.prototype.highlightColor = new Color(250, 200, 130);
SpriteMorph.prototype.highlightBorder = 8;
SpriteMorph.prototype.bubbleColor = WHITE;
SpriteMorph.prototype.bubbleFontSize = 14;
SpriteMorph.prototype.bubbleFontIsBold = true;
SpriteMorph.prototype.bubbleCorner = 10;
SpriteMorph.prototype.bubbleBorder = 3;
SpriteMorph.prototype.bubbleBorderColor = new Color(190, 190, 190);
SpriteMorph.prototype.bubbleMaxTextWidth = 130;
SpriteMorph.prototype.primitiveBlocks = function () {
return {
// Bootstrapping helpers
reportHyperZip: {
dev: true,
type: 'reporter',
category: 'control',
spec:
'zip %repRing inputs: %br %s leaf-rank %n %br %s leaf-rank %n',
code: 'zip',
src: `(
ifElse (> (data [rank] (get a)) (get a-rank))
(ifElse (> (data [rank] (get b)) (get b-rank))
(report (map (ring
(zip (get fun)
(item nil (get a)) (get a-rank)
(item nil (get b)) (get b-rank)))
(range 1 (min (data [length] (get a))
(data [length] (get b))))))
(report (map (ring
(zip (get fun)
nil (get a-rank) (get b) (get b-rank)))
(get a))))
(ifElse (> (data [rank] (get b)) (get b-rank))
(report (map (ring
(zip (get fun)
(get a) (get a-rank) nil (get b-rank)))
(get b)))
(report (call (get fun) (get a) (get b))))
fun a a-rank b b-rank)`
},
// Motion
forward: {
only: SpriteMorph,
type: 'command',
category: 'motion',
spec: 'move %n steps',
defaults: [10],
code: 'move',
src: `(
(prim t forward steps)
(goto (+ (pos) (*
(list
(fn [sin] (dir))
(fn [cos] (dir)))
(get steps)))))`
},
turn: {
only: SpriteMorph,
type: 'command',
category: 'motion',
spec: 'turn $clockwise %n degrees',
defaults: [15],
code: 'right',
src: `(
(prim t turn angle)
(head (+ (dir) (get angle))))`
},
turnLeft: {
only: SpriteMorph,
type: 'command',
category: 'motion',
spec: 'turn $counterclockwise %n degrees',
defaults: [15],
code: 'left',
src: `(
(prim t turnLeft angle)
(head (- (dir) (get angle))))`
},
setHeading: {
only: SpriteMorph,
type: 'command',
category: 'motion',
spec: 'point in direction %dir',
defaults: [90],
code: 'head',
src: `(
(prim t setHeading angle)
(face (+ (pos) (ifThen (= (join (get angle)) random)
(list
(fn [sin] (rand 0.1 360.1))
(fn [cos] (rand 0.1 360.1)))
(list
(fn [sin] (get angle))
(fn [cos] (get angle)))))))`
},
doFaceTowards: {
only: SpriteMorph,
type: 'command',
category: 'motion',
spec: 'point towards %dst',
defaults: [['mouse-pointer']],
code: 'face'
},
gotoXY: {
only: SpriteMorph,
type: 'command',
category: 'motion',
spec: 'go to x: %n y: %n',
defaults: [0, 0],
code: 'go',
src: `(
(prim t gotoXY x y)
(goto (list (get x) (get y))))`
},
doGotoObject: {
only: SpriteMorph,
type: 'command',
category: 'motion',
spec: 'go to %dst',
defaults: [['random position']],
code: 'goto'
},
doGlide: {
only: SpriteMorph,
type: 'command',
category: 'motion',
spec: 'glide %n secs to x: %n y: %n',
defaults: [1, 0, 0],
code: 'glide',
src: `(
(prim t doGlide span x y)
(var pos start fract)
(set pos (pos))
(set start (current "[time in milliseconds]"))
(until (>= (get fract) 1) (
(set fract (/
(- (current "[time in milliseconds]") (get start))
(* (get span) 1000)))
(goto (+
(get pos)
(* (- (list (get x) (get y)) (get pos)) (get fract))))))
(go (get x) (get y)))`
},
changeXPosition: {
only: SpriteMorph,
type: 'command',
category: 'motion',
spec: 'change x by %n',
defaults: [10],
code: '+x',
src: `(
(prim t changeXPosition delta)
(x= (+ (x) (get delta))))`
},
setXPosition: {
only: SpriteMorph,
type: 'command',
category: 'motion',
spec: 'set x to %n',
defaults: [0],
code: 'x=',
src: `(
(prim t setXPosition x)
(goto (list (get x) (y))))`
},
changeYPosition: {
only: SpriteMorph,
type: 'command',
category: 'motion',
spec: 'change y by %n',
defaults: [10],
code: '+y',
src: `(
(prim t changeYPosition delta)
(y= (+ (y) (get delta))))`
},
setYPosition: {
only: SpriteMorph,
type: 'command',
category: 'motion',
spec: 'set y to %n',
defaults: [0],
code: 'y=',
src: `(
(prim t setYPosition y)
(goto (list (x) (get y))))`
},
bounceOffEdge: {
only: SpriteMorph,
type: 'command',
category: 'motion',
spec: 'if on edge, bounce',
code: 'bounce',
src: `(
(prim t bounceOffEdge)
(if (touch [edge]) (
(var "get bounds" bounds center "stage bounds" "dir x"
"dir y" "delta x" "delta y")
(set "get bounds" (ring (list
(min : (cons
(list (my [left]) (my [bottom]))
(map (ring
(list
(attribute [left] nil)
(attribute [bottom] nil)))
(my [parts]))))
(max : (cons
(list (my [right]) (my [top]))
(map (ring
(list
(attribute [right] nil)
(attribute [top] nil)))
(my [parts])))))))
(set bounds (call (get "get bounds")))
(set center (/ (+ : (get bounds)) 2))
(set "stage bounds" (ask (my [stage]) (ring (list
(list (my [left]) (my [bottom]))
(list (my [right]) (my [top]))))))
(set "dir x" (fn [sin] (dir)))
(set "dir y" (fn [cos] (dir)))
(if (<
(item 1 (item 1 (get bounds)))
(item 1 (item 1 (get "stage bounds"))))
(set "dir x" (fn [abs] (get "dir x"))))
(if (>
(item 1 (item 2 (get bounds)))
(item 1 (item 2 (get "stage bounds"))))
(set "dir x" (fn [neg] (fn [abs] (get "dir x")))))
(if (>
(item 2 (item 2 (get bounds)))
(item 2 (item 2 (get "stage bounds"))))
(set "dir y" (fn [neg] (fn [abs] (get "dir y")))))
(if (<
(item 2 (item 1 (get bounds)))
(item 2 (item 1 (get "stage bounds"))))
(set "dir y" (fn [abs] (get "dir y"))))
(head (atan2 (get "dir x") (get "dir y")))
(set bounds (call (get "get bounds")))
(goto (+ (pos) (- (get center) (/ (+ : (get bounds)) 2))))
(set bounds (call (get "get bounds")))
(if (>
(item 1 (item 2 (get bounds)))
(item 1 (item 2 (get "stage bounds"))))
(set "delta x" (-
(item 1 (item 2 (get "stage bounds")))
(item 1 (item 2 (get bounds))))))
(if (<
(item 2 (item 1 (get bounds)))
(item 2 (item 1 (get "stage bounds"))))
(set "delta y" (-
(item 2 (item 1 (get "stage bounds")))
(item 2 (item 1 (get bounds))))))
(if (<
(item 1 (item 1 (get bounds)))
(item 1 (item 1 (get "stage bounds"))))
(set "delta x" (-
(item 1 (item 1 (get "stage bounds")))
(item 1 (item 1 (get bounds))))))
(if (>
(item 2 (item 2 (get bounds)))
(item 2 (item 2 (get "stage bounds"))))
(set "delta y" (-
(item 2 (item 2 (get "stage bounds")))
(item 2 (item 2 (get bounds))))))
(goto (+ (pos) (list (get "delta x") (get "delta y")))))))`
},
getPosition: {
only: SpriteMorph,
type: 'reporter',
category: 'motion',
spec: 'position',
code: 'pos',
src: `(
(prim t getPosition)
(report (list (x) (y))))`
},
xPosition: {
only: SpriteMorph,
type: 'reporter',
category: 'motion',
spec: 'x position',
code: 'x'
},
yPosition: {
only: SpriteMorph,
type: 'reporter',
category: 'motion',
spec: 'y position',
code: 'y'
},
direction: {
only: SpriteMorph,
type: 'reporter',
category: 'motion',
spec: 'direction',
code: 'dir'
},
// Looks
doSwitchToCostume: {
type: 'command',
category: 'looks',
spec: 'switch to costume %cst',
code: 'wear'
},
doWearNextCostume: {
type: 'command',
category: 'looks',
spec: 'next costume',
code: 'next',
src: `(
(prim t doWearNextCostume)
(if (> (costume#) 0)
(wear (+
(mod (costume#) (data [length] (my [costumes])))
1))))`
},
getCostumeIdx: {
type: 'reporter',
category: 'looks',
spec: 'costume #',
code: 'costume#',
src: `(
(prim t getCostumeIdx)
(report (# (my [costume]) (my [costumes]))))`
},
reportGetImageAttribute: {
type: 'reporter',
category: 'looks',
spec: '%img of costume %cst',
defaults: [['width'], ['current']],
code: 'costume'
},
reportNewCostume: {
type: 'reporter',
category: 'looks',
spec: 'new costume %l width %dim height %dim',
code: 'newCostume'
},
reportNewCostumeStretched: {
type: 'reporter',
category: 'looks',
spec: 'stretch %cst x: %n y: %n %',
defaults: [['current'], 100, 50],
code: 'stretch'
},
reportNewCostumeSkewed: {
type: 'reporter',
category: 'looks',
spec: 'skew %cst to %dir degrees %n %',
defaults: [['current'], 0, 50],
code: 'skew'
},
doSayFor: {
type: 'command',
category: 'looks',
spec: 'say %s for %n secs',
defaults: [localize('Hello!'), 2],
code: 'sayFor',
src: `(
(prim t doSayFor msg time)
(say (get msg))
(wait (get time))
(say nil))`
},
bubble: {
type: 'command',
category: 'looks',
spec: 'say %s',
defaults: [localize('Hello!')],
code: 'say'
},
doThinkFor: {
only: SpriteMorph,
type: 'command',
category: 'looks',
spec: 'think %s for %n secs',
defaults: [localize('Hmm...'), 2],
code: 'thinkFor',
src: `(
(prim t doThinkFor msg time)
(think (get msg))
(wait (get time))
(think nil))`
},
doThink: {
only: SpriteMorph,
type: 'command',
category: 'looks',
spec: 'think %s',
defaults: [localize('Hmm...')],
code: 'think'
},
changeEffect: {
type: 'command',
category: 'looks',
spec: 'change %eff effect by %n',
defaults: [['ghost'], 25],
code: '+effect'
},
setEffect: {
type: 'command',
category: 'looks',
spec: 'set %eff effect to %n',
defaults: [['ghost'], 0],
code: 'effect='
},
getEffect: {
type: 'reporter',
category: 'looks',
spec: '%eff effect',
defaults: [['ghost']],
code: 'effect'
},
clearEffects: {
type: 'command',
category: 'looks',
spec: 'clear graphic effects'
},
changeScale: {
only: SpriteMorph,
type: 'command',
category: 'looks',
spec: 'change size by %n',
defaults: [10],
code: '+size',
src: `(
(prim t changeScale delta)
(size= (+ (size) (get delta))))`
},
setScale: {
only: SpriteMorph,
type: 'command',
category: 'looks',
spec: 'set size to %n %',
defaults: [100],
code: 'size='
},
getScale: {
only: SpriteMorph,
type: 'reporter',
category: 'looks',
spec: 'size',
code: 'size'
},
show: {
type: 'command',
category: 'looks',
spec: 'show'
},
hide: {
type: 'command',
category: 'looks',
spec: 'hide'
},
reportShown: {
type: 'predicate',
category: 'looks',
spec: 'shown?',
code: 'shown'
},
goToLayer: {
only: SpriteMorph,
type: 'command',
category: 'looks',
spec: 'go to %layer layer',
defaults: [['front']],
code: 'layer',
src: `(
(prim t goToLayer name)
(ifElse (= (join (get name)) back)
(warp (until (= (# (my [self]) (ask (my [stage])
(ring (my "[other sprites]")))) 1)
(back 1)))
(warp (until (= (# (my [self]) (ask (my [stage])
(ring (my "[other sprites]"))))
(+ (data [length] (my "[other sprites]")) 1))
(back -1)))))`
},
goBack: {
only: SpriteMorph,
type: 'command',
category: 'looks',
spec: 'go back %n layers',
defaults: [1],
code: 'back'
},
// Looks - Debugging primitives for development mode
doScreenshot: {
dev: true,
type: 'command',
category: 'looks',
spec: 'save %imgsource as costume named %s',
defaults: [['pen trails'], localize('screenshot')]
},
reportCostumes: {
dev: true,
type: 'reporter',
category: 'looks',
spec: 'wardrobe'
},
alert: {
dev: true,
type: 'command',
category: 'looks',
spec: 'alert %mult%s'
},
log: {
dev: true,
type: 'command',
category: 'looks',
spec: 'console log %mult%s'
},
// Sound
playSound: {
type: 'command',
category: 'sound',
spec: 'play sound %snd',
code: 'play'
},
doPlaySoundUntilDone: {
type: 'command',
category: 'sound',
spec: 'play sound %snd until done',
code: 'playAll',
src: `(
(prim t doPlaySoundUntilDone target)
(var sound)
(set sound
(ifThen (is (get target) [sound])
(get target)
(ifThen (is (get target) [list])
(newSound (get target) 44100)
(find (pred (= (sound [name] nil) (get target)))
(my [sounds])))))
(if (is (get sound) [sound]) (
(play (get sound))
(wait (sound [duration] (get sound))))))`
},
doPlaySoundAtRate: {
type: 'command',
category: 'sound',
spec: 'play sound %snd at %rate Hz',
defaults: ['', 44100],
code: 'playAt',
src: `(
(prim t doPlaySoundAtRate target rate)
(play (newSound (sound [samples] (get target)) (get rate))))`
},
doStopAllSounds: {
type: 'command',
category: 'sound',
spec: 'stop all sounds',
code: 'stopSounds'
},
reportGetSoundAttribute: {
type: 'reporter',
category: 'sound',
spec: '%aa of sound %snd',
defaults: [['duration']],
code: 'sound'
},
reportNewSoundFromSamples: {
type: 'reporter',
category: 'sound',
spec: 'new sound %l rate %rate Hz',
defaults: [null, 44100],
code: 'newSound'
},
doRest: {
type: 'command',
category: 'sound',
spec: 'rest for %n beats',
defaults: [0.2],
code: 'rest',
src: `(
(prim t doRest beats)
(wait (/ 60 (* (get beats) (tempo)))))`
},
doPlayNote: {
type: 'command',
category: 'sound',
spec: 'play note %note for %n beats',
defaults: [60, 0.5],
code: 'note'
},
doPlayFrequency: { // only in dev mode - experimental
dev: true,
type: 'command',
category: 'sound',
spec: 'play %n Hz for %n secs',
defaults: [440, 2]
},
doSetInstrument: {
type: 'command',
category: 'sound',
spec: 'set instrument to %inst',
defaults: [1],
code: 'instrument'
},
doChangeTempo: {
type: 'command',
category: 'sound',
spec: 'change tempo by %n',
defaults: [20],
code: '+tempo',
src: `(
(prim t doChangeTempo delta)
(tempo= (+ (tempo) (get delta))))`
},
doSetTempo: {
type: 'command',
category: 'sound',
spec: 'set tempo to %n bpm',
defaults: [60],
code: 'tempo='
},
getTempo: {
type: 'reporter',
category: 'sound',
spec: 'tempo',
code: 'tempo'
},
changeVolume: {
type: 'command',
category: 'sound',
spec: 'change volume by %n',
defaults: [10],
code: '+vol',
src: `(
(prim t changeVolume delta)
(vol= (+ (vol) (get delta))))`
},
setVolume: {
type: 'command',
category: 'sound',
spec: 'set volume to %n %',
defaults: [100],
code: 'vol='
},
getVolume: {
type: 'reporter',
category: 'sound',
spec: 'volume',
code: 'vol'
},
changePan: {
type: 'command',
category: 'sound',
spec: 'change balance by %n',
defaults: [10],
code: '+pan',
src: `(
(prim t changePan delta)
(pan= (+ (pan) (get delta))))`
},
setPan: {
type: 'command',
category: 'sound',
spec: 'set balance to %n',
defaults: [0],
code: 'pan='
},
getPan: {
type: 'reporter',
category: 'sound',
spec: 'balance',
code: 'pan'
},
playFreq: {
type: 'command',
category: 'sound',
spec: 'play frequency %n Hz',
defaults: [440],
code: 'freq'
},
stopFreq: {
type: 'command',
category: 'sound',
spec: 'stop frequency'
},
// Sound - Debugging primitives for development mode
reportSounds: {
dev: true,
type: 'reporter',
category: 'sound',
spec: 'jukebox'
},
// Pen
clear: {
type: 'command',
category: 'pen',
spec: 'clear'
},
down: {
only: SpriteMorph,
type: 'command',
category: 'pen',
spec: 'pen down'
},
up: {
only: SpriteMorph,
type: 'command',
category: 'pen',
spec: 'pen up'
},
getPenDown: {
only: SpriteMorph,
type: 'predicate',
category: 'pen',
spec: 'pen down?',
code: 'down?'
},
setColor: {
only: SpriteMorph,
type: 'command',
category: 'pen',
spec: 'set pen color to %clr',
src: `(
(prim t setColor color)
(extension "clr_setpen(clr)" (get color)))`
},
setPenColorDimension: {
only: SpriteMorph,
type: 'command',
category: 'pen',
spec: 'set pen %clrdim to %n',
defaults: [['hue'], 50],
code: 'pen='
},
changePenColorDimension: {
only: SpriteMorph,
type: 'command',
category: 'pen',
spec: 'change pen %clrdim by %n',
defaults: [['hue'], 10],
code: '+pen'
},
getPenAttribute: {
type: 'reporter',
category: 'pen',
spec: 'pen %pen',
defaults: [['hue']],
code: 'pen'
},
setBackgroundColor: {
only: StageMorph,
type: 'command',
category: 'pen',
spec: 'set background color to %clr'
},
setBackgroundColorDimension: {
only: StageMorph,
type: 'command',
category: 'pen',
spec: 'set background %clrdim to %n',
defaults: [['hue'], 50]
},
changeBackgroundColorDimension: {
only: StageMorph,
type: 'command',
category: 'pen',
spec: 'change background %clrdim by %n',
defaults: [['hue'], 10]
},
changeSize: {
only: SpriteMorph,
type: 'command',
category: 'pen',
spec: 'change pen size by %n',
defaults: [1],
code: '+penSize',
src: `(
(prim t changeSize delta)
(penSize= (+ (pen [size]) (get delta))))`
},
setSize: {
only: SpriteMorph,
type: 'command',
category: 'pen',
spec: 'set pen size to %n',
defaults: [1],
code: 'penSize='
},
doStamp: {
only: SpriteMorph,
type: 'command',
category: 'pen',
spec: 'stamp',
code: 'stamp'
},