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Fix legacy setPenHueToNumber and changePenHueBy

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These two blocks were not doing the same shade-oriented math as
`setPenShadeToNumber`: effectively these blocks were using the new color
model instead of Scratch 2.0's hue-shade model. This change pulls the
hue-shade color update logic into a separate function, now called by all
the legacy pen blocks.
This commit is contained in:
Christopher Willis-Ford 2017-12-22 10:47:11 -08:00
parent ec8d9f2121
commit 5dbffe67ac
1 changed files with 28 additions and 16 deletions
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44
src/extensions/scratch3_pen/index.js
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@ -673,6 +673,8 @@ class Scratch3PenBlocks {
const hueValue = Cast.toNumber(args.HUE); const hueValue = Cast.toNumber(args.HUE);
const colorValue = hueValue / 2; const colorValue = hueValue / 2;
this._setOrChangeColorParam(ColorParam.COLOR, colorValue, penState, false); this._setOrChangeColorParam(ColorParam.COLOR, colorValue, penState, false);
this._legacyUpdatePenColor(penState);
} }
/** /**
@ -686,6 +688,8 @@ class Scratch3PenBlocks {
const hueChange = Cast.toNumber(args.HUE); const hueChange = Cast.toNumber(args.HUE);
const colorChange = hueChange / 2; const colorChange = hueChange / 2;
this._setOrChangeColorParam(ColorParam.COLOR, colorChange, penState, true); this._setOrChangeColorParam(ColorParam.COLOR, colorChange, penState, true);
this._legacyUpdatePenColor(penState);
} }
/** /**
@ -705,25 +709,10 @@ class Scratch3PenBlocks {
newShade = newShade % 200; newShade = newShade % 200;
if (newShade < 0) newShade += 200; if (newShade < 0) newShade += 200;
// Create the new color in RGB using the scratch 2 "shade" model
let rgb = Color.hsvToRgb({h: penState.color * 360 / 100, s: 1, v: 1});
const shade = (newShade > 100) ? 200 - newShade : newShade;
if (shade < 50) {
rgb = Color.mixRgb(Color.RGB_BLACK, rgb, (10 + shade) / 60);
} else {
rgb = Color.mixRgb(rgb, Color.RGB_WHITE, (shade - 50) / 60);
}
// Update the pen state according to new color
const hsv = Color.rgbToHsv(rgb);
penState.color = 100 * hsv.h / 360;
penState.saturation = 100 * hsv.s;
penState.brightness = 100 * hsv.v;
// And store the shade that was used to compute this new color for later use. // And store the shade that was used to compute this new color for later use.
penState._shade = newShade; penState._shade = newShade;
this._updatePenColor(penState); this._legacyUpdatePenColor(penState);
} }
/** /**
@ -739,6 +728,29 @@ class Scratch3PenBlocks {
this.setPenShadeToNumber({SHADE: penState._shade + shadeChange}, util); this.setPenShadeToNumber({SHADE: penState._shade + shadeChange}, util);
} }
/**
* Update the pen state's color from its hue & shade values, Scratch 2.0 style.
* @param {object} penState - update the HSV & RGB values in this pen state from its hue & shade values.
* @private
*/
_legacyUpdatePenColor (penState) {
// Create the new color in RGB using the scratch 2 "shade" model
let rgb = Color.hsvToRgb({h: penState.color * 360 / 100, s: 1, v: 1});
const shade = (penState._shade > 100) ? 200 - penState._shade : penState._shade;
if (shade < 50) {
rgb = Color.mixRgb(Color.RGB_BLACK, rgb, (10 + shade) / 60);
} else {
rgb = Color.mixRgb(rgb, Color.RGB_WHITE, (shade - 50) / 60);
}
// Update the pen state according to new color
const hsv = Color.rgbToHsv(rgb);
penState.color = 100 * hsv.h / 360;
penState.saturation = 100 * hsv.s;
penState.brightness = 100 * hsv.v;
this._updatePenColor(penState);
}
} }
module.exports = Scratch3PenBlocks; module.exports = Scratch3PenBlocks;