improve typing of toArray methods

src/mol-math/geometry/primitives/sphere3d.ts

@@ -109,9 +109,10 @@ namespace Sphere3D {
         return out;
     }
 
-    export function toArray(s: Sphere3D, out: NumberArray, offset: number) {
+    export function toArray<T extends NumberArray>(s: Sphere3D, out: T, offset: number) {
         Vec3.toArray(s.center, out, offset);
         out[offset + 3] = s.radius;
+        return out;
     }
 
     export function fromArray(out: Sphere3D, array: NumberArray, offset: number) {

src/mol-math/linear-algebra/3d/mat3.ts

@@ -64,7 +64,7 @@ namespace Mat3 {
         return mat;
     }
 
-    export function toArray(a: Mat3, out: NumberArray, offset: number) {
+    export function toArray<T extends NumberArray>(a: Mat3, out: T, offset: number) {
         out[offset + 0] = a[0];
         out[offset + 1] = a[1];
         out[offset + 2] = a[2];

src/mol-math/linear-algebra/3d/mat4.ts

@@ -124,7 +124,7 @@ namespace Mat4 {
         return a[4 * j + i];
     }
 
-    export function toArray(a: Mat4, out: NumberArray, offset: number) {
+    export function toArray<T extends NumberArray>(a: Mat4, out: T, offset: number) {
         out[offset + 0] = a[0];
         out[offset + 1] = a[1];
         out[offset + 2] = a[2];

src/mol-math/linear-algebra/3d/quat.ts

@@ -314,7 +314,7 @@ namespace Quat {
         return out;
     }
 
-    export function toArray(a: Quat, out: NumberArray, offset: number) {
+    export function toArray<T extends NumberArray>(a: Quat, out: T, offset: number) {
         out[offset + 0] = a[0];
         out[offset + 1] = a[1];
         out[offset + 2] = a[2];

src/mol-math/linear-algebra/3d/vec2.ts

@@ -50,7 +50,7 @@ namespace Vec2 {
         return isNaN(a[0]) || isNaN(a[1]);
     }
 
-    export function toArray(a: Vec2, out: NumberArray, offset: number) {
+    export function toArray<T extends NumberArray>(a: Vec2, out: T, offset: number) {
         out[offset + 0] = a[0];
         out[offset + 1] = a[1];
         return out;

src/mol-math/linear-algebra/3d/vec3.ts

@@ -74,7 +74,7 @@ namespace Vec3 {
         return v;
     }
 
-    export function toArray(v: Vec3, out: NumberArray, offset: number) {
+    export function toArray<T extends NumberArray>(v: Vec3, out: T, offset: number) {
         out[offset + 0] = v[0];
         out[offset + 1] = v[1];
         out[offset + 2] = v[2];

src/mol-math/linear-algebra/3d/vec4.ts

@@ -70,7 +70,7 @@ namespace Vec4 {
         return isNaN(a[0]) || isNaN(a[1]) || isNaN(a[2]) || isNaN(a[3]);
     }
 
-    export function toArray(a: Vec4, out: NumberArray, offset: number) {
+    export function toArray<T extends NumberArray>(a: Vec4, out: T, offset: number) {
         out[offset + 0] = a[0];
         out[offset + 1] = a[1];
         out[offset + 2] = a[2];

src/mol-util/material.ts

@@ -23,7 +23,7 @@ export function Material(values?: Partial<Material>) {
 export namespace Material {
     export const Zero: Material = { metalness: 0, roughness: 0, bumpiness: 0 };
 
-    export function toArray(material: Material, array: NumberArray, offset: number) {
+    export function toArray<T extends NumberArray>(material: Material, array: T, offset: number) {
         array[offset] = material.metalness * 255;
         array[offset + 1] = material.roughness * 255;
         array[offset + 2] = material.bumpiness * 255;