polymer-trace-mesh.ts

/**
 * Copyright (c) 2018-2019 mol* contributors, licensed under MIT, See LICENSE file for more info.
 *
 * @author Alexander Rose <alexander.rose@weirdbyte.de>
 */

import { ParamDefinition as PD } from '../../../mol-util/param-definition';
import { VisualContext } from '../../visual';
import { Unit, Structure } from '../../../mol-model/structure';
import { Theme } from '../../../mol-theme/theme';
import { Mesh } from '../../../mol-geo/geometry/mesh/mesh';
import { MeshBuilder } from '../../../mol-geo/geometry/mesh/mesh-builder';
import { createCurveSegmentState, PolymerTraceIterator, interpolateCurveSegment, interpolateSizes, PolymerLocationIterator, getPolymerElementLoci, eachPolymerElement } from './util/polymer';
import { isNucleic, SecondaryStructureType } from '../../../mol-model/structure/model/types';
import { addSheet } from '../../../mol-geo/geometry/mesh/builder/sheet';
import { addTube } from '../../../mol-geo/geometry/mesh/builder/tube';
import { UnitsMeshParams, UnitsVisual, UnitsMeshVisual, StructureGroup } from '../units-visual';
import { VisualUpdateState } from '../../util';
import { ComputedSecondaryStructure } from '../../../mol-model-props/computed/secondary-structure';
import { addRibbon } from '../../../mol-geo/geometry/mesh/builder/ribbon';

export const PolymerTraceMeshParams = {
    sizeFactor: PD.Numeric(0.2, { min: 0, max: 10, step: 0.01 }),
    linearSegments: PD.Numeric(8, { min: 1, max: 48, step: 1 }),
    radialSegments: PD.Numeric(16, { min: 2, max: 56, step: 2 }),
    aspectRatio: PD.Numeric(5, { min: 0.1, max: 10, step: 0.1 }),
    arrowFactor: PD.Numeric(1.5, { min: 0, max: 3, step: 0.1 }),
}
export const DefaultPolymerTraceMeshProps = PD.getDefaultValues(PolymerTraceMeshParams)
export type PolymerTraceMeshProps = typeof DefaultPolymerTraceMeshProps

// TODO handle polymer ends properly

function createPolymerTraceMesh(ctx: VisualContext, unit: Unit, structure: Structure, theme: Theme, props: PolymerTraceMeshProps, mesh?: Mesh) {
    const polymerElementCount = unit.polymerElements.length

    if (!polymerElementCount) return Mesh.createEmpty(mesh)
    const { sizeFactor, linearSegments, radialSegments, aspectRatio, arrowFactor } = props

    const vertexCount = linearSegments * radialSegments * polymerElementCount + (radialSegments + 1) * polymerElementCount * 2
    const builderState = MeshBuilder.createState(vertexCount, vertexCount / 10, mesh)

    const isCoarse = Unit.isCoarse(unit)
    const state = createCurveSegmentState(linearSegments)
    const { curvePoints, normalVectors, binormalVectors, widthValues, heightValues } = state

    let i = 0
    const polymerTraceIt = PolymerTraceIterator(unit, structure)
    while (polymerTraceIt.hasNext) {
        const v = polymerTraceIt.move()
        builderState.currentGroup = i

        const isNucleicType = isNucleic(v.moleculeType)
        const isSheet = SecondaryStructureType.is(v.secStrucType, SecondaryStructureType.Flag.Beta)
        const isHelix = SecondaryStructureType.is(v.secStrucType, SecondaryStructureType.Flag.Helix)
        const tension = isHelix ? 0.9 : 0.5
        const shift = isNucleicType ? 0.3 : 0.5

        interpolateCurveSegment(state, v, tension, shift)

        let w0 = theme.size.size(v.centerPrev) * sizeFactor
        let w1 = theme.size.size(v.center) * sizeFactor
        let w2 = theme.size.size(v.centerNext) * sizeFactor
        if (isCoarse) {
            w0 *= aspectRatio / 2
            w1 *= aspectRatio / 2
            w2 *= aspectRatio / 2
        }

        if (isSheet) {