@ankhzet/goo
v0.0.2
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Elegoo .goo file format reader/writer
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@ankhzet/goo
Elegoo .goo file format reader/writer
Reading from .goo files
const filePath = path.resolve('./test.goo');
const binaryReader = new BinaryReader(await fs.open(filePath));
const gooReader = new GooReader(binaryReader);
const goo = await gooReader.read();
console.log(goo); // { header: { ... }, layers: [...] }
for (const { dimensions, input } of goo.header.previews) {
// save preview image into file
await saveImage({
input,
dimensions: dimensions,
pathname: path.resolve(`./preview-${dimensions.x}x${dimensions.y}.png`),
});
}
for (const [index, { slice }] of read.layers.entries()) {
// save slice image into file
await saveImage({
input: slice,
dimensions: goo.header.printer.resolution,
pathname: path.resolve(`./layer-${index}.png`),
});
}Writing to .goo files
const outPath = path.resolve('<path>/test.goo');
const previewPath = path.resolve('<path>/preview.png');
const slicePath = path.resolve('<path>/preview.png');
const binaryWriter = new BinaryWriter(1024 * 1024);
const gooWriter = new GooWriter(binaryWriter);
const previews = [116, 290].map((size): GooPreview => ({
dimensions: { x: size, y: size },
input: previewPath,
}));
const layerHeight = 0.05;
const layers: GooLayer[] = [<GooLayer>{
slice: slicePath,
definition: {
pause: {
mode: 0,
z: 100,
},
z: layerHeight * 0 + layerHeight,
exposure: 5,
offTime: 0.1,
times: {
before: {
lift: 0,
},
after: {
lift: 0,
retract: 0,
},
},
motions: {
lift: {
first: {
distance: 5.0,
speed: 65.0,
},
second: {
distance: 0,
speed: 0,
},
},
retract: {
first: {
distance: 5.0,
speed: 150.0,
},
second: {
distance: 0,
speed: 0,
},
},
},
pwm: 255,
},
transform: {
invert: false,
translate: {
x: 0,
y: 0,
},
scale: 1.0,
rotate: {
angle: 0,
origin: { x: 0, y: 0 },
},
},
}];
const goo = {
header: {
date: new Date(),
printer: PRINTER_MARS_4_ULTRA_9K,
layers: layers.length,
previews,
layerConfig: {
bottomLayers: 1,
transitionLayers: 1,
thickness: 0.05,
bottomExposure: 10,
commonExposure: 10,
exposureDelay: true,
turnOffTime: 0.1,
advance: false,
timings: {
bottom: {
before: {
lift: 0,
},
after: {
lift: 0,
retract: 0,
},
},
common: {
before: {
lift: 0,
},
after: {
lift: 0,
retract: 0,
},
},
},
motions: {
first: {
lift: {
bottom: {
distance: 5.0,
speed: 65.0,
},
common: {
distance: 5.0,
speed: 65.0,
},
},
retract: {
bottom: {
distance: 5.0,
speed: 150.0,
},
common: {
distance: 5.0,
speed: 150.0,
},
},
},
second: {
lift: {
common: {
distance: 0,
speed: 0,
},
bottom: {
distance: 0,
speed: 0,
},
},
retract: {
common: {
distance: 0,
speed: 0,
},
bottom: {
distance: 0,
speed: 0,
},
},
},
},
pwm: {
bottom: 255,
common: 255,
},
},
summary: {
price: 9.99,
currency: 'USD',
time: layers.reduce((acc, layer) => acc + layerTime(layer), 0),
volume: 100.0,
weight: 100.0,
},
},
layers,
};
await fs.rm(outPath, { force: true }); // remove old file
const out = await fs.open(outPath, 'w+');
try {
await gooWriter.write(goo, (buffer) => out.write(buffer));
} finally {
await out.close();
}Printer definitions
const PRINTER_MARS_4_ULTRA_9K: PrinterDefinition = {
name: 'ELEGOO Mars 4 Ultra 9K',
type: 'MSLA',
resolution: { x: 8520, y: 4320 },
platform: { x: 153.36, y: 77.76, z: 165 },
mirror: { x: true, y: false },
resinProfile: 'PCB', // unused
grayscale: true,
antialiasing: 4,
blur: 2,
gray: 5,
};Filling Goo structure
When constructing Goo instance, image fields can be either paths to the file (all formats supported by sharp library out of the box should be supported),
or actual image color channels data:
type ImageChannels = 1|2|3|4;
type ImageDescriptor = string | {
buffer: Buffer;
channels: ImageChannels;
};Previews:
// this would be used for preview
const previewPath = path.resolve('<path>/preview.png');
// 116 and 290 are hardcoded in the `.goo` specification
const previews = [116, 290].map((size) => ({
dimensions: { x: size, y: size },
input: previewPath,
}));Layers:
// images of slices themselves
const slicePaths = [
path.resolve('<path>/layer-0.png'),
path.resolve('<path>/layer-1.png'),
path.resolve('<path>/layer-2.png'),
...
];
// depends on printer, resin, timings etc.
const layerHeight = 0.05;
// all settings in this example are tuned for a one-layer `.goo` file, used to burn PCB pattern on the photoresist
const layers = slicePaths.map((slice, index) => ({
// slice image path
slice,
// all fields have documentation, with value types specified (seconds, pixels, mm etc.)
definition: {
pause: {
mode: 0,
z: 100,
},
z: layerHeight * index + layerHeight,
exposure: 5,
offTime: 0.1,
times: {
before: {
lift: 0,
},
after: {
lift: 0,
retract: 0,
},
},
motions: {
lift: {
first: {
distance: 5.0,
speed: 65.0,
},
second: {
distance: 0,
speed: 0,
},
},
retract: {
first: {
distance: 5.0,
speed: 150.0,
},
second: {
distance: 0,
speed: 0,
},
},
},
pwm: 255,
},
transform: {
invert: false,
translate: {
x: 0,
y: 0,
},
scale: 1.0,
rotate: {
angle: 0,
origin: { x: 0, y: 0 },
},
},
}));Goo:
const goo = {
header: {
date: new Date(),
printer: PRINTER_MARS_4_ULTRA_9K,
layers: layers.length,
previews,
layerConfig: {
bottomLayers: 1,
transitionLayers: 1,
thickness: layerHeight,
bottomExposure: 10,
commonExposure: 10,
exposureDelay: true,
turnOffTime: 0.1,
advance: false,
timings: {
bottom: {
before: {
lift: 0,
},
after: {
lift: 0,
retract: 0,
},
},
common: {
before: {
lift: 0,
},
after: {
lift: 0,
retract: 0,
},
},
},
motions: {
first: {
lift: {
bottom: {
distance: 5.0,
speed: 65.0,
},
common: {
distance: 5.0,
speed: 65.0,
},
},
retract: {
bottom: {
distance: 5.0,
speed: 150.0,
},
common: {
distance: 5.0,
speed: 150.0,
},
},
},
second: {
lift: {
common: {
distance: 0,
speed: 0,
},
bottom: {
distance: 0,
speed: 0,
},
},
retract: {
common: {
distance: 0,
speed: 0,
},
bottom: {
distance: 0,
speed: 0,
},
},
},
},
pwm: {
bottom: 255,
common: 255,
},
},
summary: {
price: 9.99,
currency: 'USD',
time: layers.reduce((acc, layer) => acc + layerTime(layer), 0),
volume: 100.0,
weight: 100.0,
},
},
layers,
};