message: fix normals in sheet caps
diff: @@ -43,14 +43,14 @@ function addCap(offset: number, state: MeshBuilder.State, controlPoints: ArrayLi
  const { vertices, normals, indices } = state;
  const vertexCount = vertices.elementCount;
  - v3fromArray(verticalLeftVector, normalVectors, offset);
  - v3scale(verticalLeftVector, verticalLeftVector, leftHeight);
  + v3fromArray(tA, normalVectors, offset);
  + v3scale(verticalLeftVector, tA, leftHeight);
  + v3scale(verticalRightVector, tA, rightHeight);
  - v3fromArray(verticalRightVector, normalVectors, offset);
  - v3scale(verticalRightVector, verticalRightVector, rightHeight);
  + v3fromArray(tB, binormalVectors, offset);
  + v3scale(horizontalVector, tB, width);
  - v3fromArray(horizontalVector, binormalVectors, offset);
  - v3scale(horizontalVector, horizontalVector, width);
  + v3cross(normalVector, tB, tA);
  v3fromArray(positionVector, controlPoints, offset);
  @@ -73,8 +73,6 @@ function addCap(offset: number, state: MeshBuilder.State, controlPoints: ArrayLi
  v3copy(verticalVector, verticalLeftVector);
  }
  - v3cross(normalVector, horizontalVector, verticalVector);
  -
  for (let i = 0; i < 4; ++i) {
  caAdd3(normals, normalVector[0], normalVector[1], normalVector[2]);
  }
  