@ankhzet/goo
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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
```ts
// interfaces/types
import type { Goo, GooLayer, GooPreview, PrinterDefinition } from '@ankhzet/goo';
// stream helpers
import { BinaryReader, BinaryWriter } from '@ankhzet/goo';
// format encoder/decoder
import { GooWriter, GooReader } from '@ankhzet/goo';
// utils
import { layerTime, saveImage, printBuffer } from '@ankhzet/goo';
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
```ts
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
```ts
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:
```ts
type ImageChannels = 1|2|3|4;
type ImageDescriptor = string | {
buffer: Buffer;
channels: ImageChannels;
};
```
Previews:
```ts
// 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:
```ts
// 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`:
```ts
const goo: 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,
};
```