import { MatN, VecN } from '@holotope/core';
import type { SimplexMetricDeformationN } from './simplex-deformation.js';
import { XpbdPotentialDomainErrorN } from './xpbd-potential-domain.js';
export type SimplexConstitutiveDomainReasonN = 'collapsed' | 'inverted' | 'non-positive-measure' | 'below-minimum-measure' | 'barrier-component-outside-float64';
/** Typed material-chart refusal, distinct from malformed input or arithmetic failure. */
export declare class SimplexConstitutiveDomainErrorN extends XpbdPotentialDomainErrorN<SimplexConstitutiveDomainReasonN> {
    constructor(lawId: string, reason: SimplexConstitutiveDomainReasonN, message: string);
}
/** Common energy, stress, and current-gradient evidence for one simplex law. */
export interface SimplexConstitutiveEvaluationN<TMaterial> {
    readonly deformation: SimplexMetricDeformationN;
    readonly material: TMaterial;
    /** Intrinsic k-measure of the rest simplex. */
    readonly restMeasure: number;
    /** Energy per unit rest k-measure. */
    readonly energyDensity: number;
    /** `restMeasure * energyDensity`. */
    readonly energy: number;
    /** Symmetric second Piola stress in the deterministic rest-material basis. */
    readonly secondPiolaStress: MatN;
    /** `d energy / d currentPositions[i]`; internal force is its negative. */
    readonly currentGradients: readonly VecN[];
    /** Norm of the summed gradients; translation invariance should make it zero. */
    readonly netGradientResidual: number;
}
/** Internal shared constitutive-chart selection for intrinsic/full-dimensional J. */
export declare function positiveSimplexConstitutiveMeasureRatioN(deformation: SimplexMetricDeformationN, lawId: string, caller: string): number;
interface CompleteSimplexConstitutiveEvaluationNOptions<TMaterial> {
    readonly caller: string;
    readonly restPositions: readonly VecN[];
    readonly currentPositions: readonly VecN[];
    readonly deformation: SimplexMetricDeformationN;
    readonly material: TMaterial;
    readonly energyDensity: number;
    readonly secondPiolaStress: MatN;
}
/** Internal common assembly from a constitutive stress to vertex gradients. */
export declare function completeSimplexConstitutiveEvaluationN<TMaterial>(options: CompleteSimplexConstitutiveEvaluationNOptions<TMaterial>): SimplexConstitutiveEvaluationN<TMaterial>;
export {};
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