improve handling of .meta in Mesh & TextureMesh

src/mol-geo/geometry/texture-mesh/texture-mesh.ts

@@ -40,7 +40,7 @@ export interface TextureMesh {
 
     readonly boundingSphere: Sphere3D
 
-    meta?: unknown
+    readonly meta: { [k: string]: unknown }
 }
 
 export namespace TextureMesh {
@@ -92,6 +92,7 @@ export namespace TextureMesh {
                 normalTexture: ValueCell.create(normalTexture),
                 doubleBuffer: new DoubleBuffer(),
                 boundingSphere: Sphere3D.clone(boundingSphere),
+                meta: {}
             };
         }
     }
@@ -165,6 +166,8 @@ export namespace TextureMesh {
             dIgnoreLight: ValueCell.create(props.ignoreLight),
             dXrayShaded: ValueCell.create(props.xrayShaded),
             dGeoTexture: ValueCell.create(true),
+
+            meta: ValueCell.create(textureMesh.meta),
         };
     }
 

src/mol-gl/renderable/texture-mesh.ts

@@ -7,7 +7,7 @@
 import { Renderable, RenderableState, createRenderable } from '../renderable';
 import { WebGLContext } from '../webgl/context';
 import { createGraphicsRenderItem } from '../webgl/render-item';
-import { GlobalUniformSchema, BaseSchema, DefineSpec, Values, InternalSchema, InternalValues, UniformSpec, TextureSpec, GlobalTextureSchema } from './schema';
+import { GlobalUniformSchema, BaseSchema, DefineSpec, Values, InternalSchema, InternalValues, UniformSpec, TextureSpec, GlobalTextureSchema, ValueSpec } from './schema';
 import { MeshShaderCode } from '../shader-code';
 import { ValueCell } from '../../mol-util';
 
@@ -24,6 +24,7 @@ export const TextureMeshSchema = {
     dIgnoreLight: DefineSpec('boolean'),
     dXrayShaded: DefineSpec('boolean'),
     dGeoTexture: DefineSpec('boolean'),
+    meta: ValueSpec('unknown')
 };
 export type TextureMeshSchema = typeof TextureMeshSchema
 export type TextureMeshValues = Values<TextureMeshSchema>

src/mol-repr/structure/visual/gaussian-surface-mesh.ts

@@ -233,7 +233,7 @@ async function createGaussianSurfaceTextureMesh(ctx: VisualContext, unit: Unit,
 
     const boundingSphere = Sphere3D.expand(Sphere3D(), unit.boundary.sphere, props.radiusOffset + getStructureExtraRadius(structure));
     const surface = TextureMesh.create(gv.vertexCount, 1, gv.vertexTexture, gv.groupTexture, gv.normalTexture, boundingSphere, textureMesh);
-    (surface.meta as GaussianSurfaceMeta) = { resolution: densityTextureData.resolution };
+    (surface.meta as GaussianSurfaceMeta).resolution = densityTextureData.resolution;
 
     return surface;
 }
@@ -309,7 +309,7 @@ async function createStructureGaussianSurfaceTextureMesh(ctx: VisualContext, str
 
     const boundingSphere = Sphere3D.expand(Sphere3D(), structure.boundary.sphere, props.radiusOffset + getStructureExtraRadius(structure));
     const surface = TextureMesh.create(gv.vertexCount, 1, gv.vertexTexture, gv.groupTexture, gv.normalTexture, boundingSphere, textureMesh);
-    (surface.meta as GaussianSurfaceMeta) = { resolution: densityTextureData.resolution };
+    (surface.meta as GaussianSurfaceMeta).resolution = densityTextureData.resolution;
 
     return surface;
 }

src/mol-repr/structure/visual/molecular-surface-mesh.ts

@@ -58,7 +58,7 @@ async function createMolecularSurfaceMesh(ctx: VisualContext, unit: Unit, struct
 
     const sphere = Sphere3D.expand(Sphere3D(), unit.boundary.sphere, props.probeRadius + getUnitExtraRadius(unit));
     surface.setBoundingSphere(sphere);
-    (surface.meta.resolution as MolecularSurfaceMeta['resolution']) = resolution;
+    (surface.meta as MolecularSurfaceMeta).resolution = resolution;
 
     return surface;
 }
@@ -90,7 +90,7 @@ export function MolecularSurfaceMeshVisual(materialId: number): UnitsVisual<Mole
             const csp = getColorSmoothingProps(props, theme, resolution);
             if (csp) {
                 applyMeshColorSmoothing(values, csp.resolution, csp.stride, webgl, colorTexture);
-                (geometry.meta.colorTexture as MolecularSurfaceMeta['colorTexture']) = values.tColorGrid.ref.value;
+                (geometry.meta as MolecularSurfaceMeta).colorTexture = values.tColorGrid.ref.value;
             }
         },
         dispose: (geometry: Mesh) => {