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import { FEATHER_HANDLE_SCALE, MAX_FEATHER } from "@/lib/masks/feather";
import { masksRegistry } from "@/lib/masks";
import type { ParamValues } from "@/lib/params";
import type {
BaseMaskParams,
MaskParamUpdateArgs,
MaskType,
} from "@/lib/masks/types";
function compactMaskParamValues({
params,
}: {
params: Partial<ParamValues>;
}): ParamValues {
const nextParams: ParamValues = {};
for (const [key, value] of Object.entries(params)) {
if (value !== undefined) {
nextParams[key] = value;
}
}
return nextParams;
}
export function computeFeatherUpdate({
startFeather,
deltaX,
deltaY,
directionX,
directionY,
}: {
startFeather: number;
deltaX: number;
deltaY: number;
directionX: number;
directionY: number;
}): ParamValues {
const projection = deltaX * directionX + deltaY * directionY;
return {
feather: Math.max(
0,
Math.min(
MAX_FEATHER,
Math.round(startFeather + projection / FEATHER_HANDLE_SCALE),
),
),
};
}
export function computeMaskParamUpdate({
maskType,
...args
}: {
maskType: MaskType;
} & MaskParamUpdateArgs<BaseMaskParams & ParamValues>): ParamValues {
const definition = masksRegistry.get(maskType);
return compactMaskParamValues({
params: definition.computeParamUpdate(args),
});
}
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