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Add gsplatXaxis/Yaxis/Zaxis helper dynos #419

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Merged
asundqui merged 2 commits into from
Sep 3, 2026
Merged

Add gsplatXaxis/Yaxis/Zaxis helper dynos #419

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da2fe65
Add gsplatXaxis/Yaxis/Zaxis helper dynos
asundqui Sep 2, 2026
c39acd9
Capitalization rename to gsplatXAxis etc, add to docs.
asundqui Sep 3, 2026
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3 changes: 3 additions & 0 deletions docs/docs/dyno-stdlib.md
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Original file line number Diff line number Diff line change
Expand Up @@ -232,4 +232,7 @@ This way, you can pass around a `DynoVal<Gsplat>` that contains the all the prop
| `splitGsplat(gsplat)` | Split a `Gsplat` into its components |
| `combineGsplat(gsplat)` | Create a `Gsplat` from components (or inject components into an existing `Gsplat`) |
| `gsplatNormal(gsplat)` | Get the `Gsplat` normal, defined as whichever X/Y/Z axis has the smallest scale |
| `gsplatXAxis(gsplat)` | Return the unit vector along the splat's X-axis |
| `gsplatYAxis(gsplat)` | Return the unit vector along the splat's Y-axis |
| `gsplatZAxis(gsplat)` | Return the unit Vector along the splat's Z-axis |
| `transformGsplat(gsplat, { scale?, rotate?, translate?, recolor? })` | Transform a `Gsplat` and all its components by the given transform |
36 changes: 36 additions & 0 deletions src/dyno/splats.ts
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Expand Up @@ -108,6 +108,12 @@ export const combineGsplat = ({
};
export const gsplatNormal = (gsplat: DynoVal<typeof Gsplat>): DynoVal<"vec3"> =>
new GsplatNormal({ gsplat });
export const gsplatXAxis = (gsplat: DynoVal<typeof Gsplat>): DynoVal<"vec3"> =>
new GsplatXAxis({ gsplat });
export const gsplatYAxis = (gsplat: DynoVal<typeof Gsplat>): DynoVal<"vec3"> =>
new GsplatYAxis({ gsplat });
export const gsplatZAxis = (gsplat: DynoVal<typeof Gsplat>): DynoVal<"vec3"> =>
new GsplatZAxis({ gsplat });

export const transformGsplat = (
gsplat: DynoVal<typeof Gsplat>,
Expand Down Expand Up @@ -751,6 +757,36 @@ export class GsplatNormal extends UnaryOp<typeof Gsplat, "vec3", "normal"> {
}
}

export class GsplatXAxis extends UnaryOp<typeof Gsplat, "vec3", "xaxis"> {
constructor({ gsplat }: { gsplat: DynoVal<typeof Gsplat> }) {
super({ a: gsplat, outKey: "xaxis", outTypeFunc: () => "vec3" });
this.globals = () => [defineGsplat];
this.statements = ({ inputs, outputs }) => [
`${outputs.xaxis} = quatVec(${inputs.a}.quaternion, vec3(1.0, 0.0, 0.0));`,
];
}
}

export class GsplatYAxis extends UnaryOp<typeof Gsplat, "vec3", "yaxis"> {
constructor({ gsplat }: { gsplat: DynoVal<typeof Gsplat> }) {
super({ a: gsplat, outKey: "yaxis", outTypeFunc: () => "vec3" });
this.globals = () => [defineGsplat];
this.statements = ({ inputs, outputs }) => [
`${outputs.yaxis} = quatVec(${inputs.a}.quaternion, vec3(0.0, 1.0, 0.0));`,
];
}
}

export class GsplatZAxis extends UnaryOp<typeof Gsplat, "vec3", "zaxis"> {
constructor({ gsplat }: { gsplat: DynoVal<typeof Gsplat> }) {
super({ a: gsplat, outKey: "zaxis", outTypeFunc: () => "vec3" });
this.globals = () => [defineGsplat];
this.statements = ({ inputs, outputs }) => [
`${outputs.zaxis} = quatVec(${inputs.a}.quaternion, vec3(0.0, 0.0, 1.0));`,
];
}
}

export class TransformGsplat
extends Dyno<
{
Expand Down
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