Function prioritizeFrustumTexture

src/hooks/useFrustumTexture.ts:237–252

(
  imageFile: File,
  imageName: string
)

 * Useful when user selects or navigates to an image.
 */
export async function prioritizeFrustumTexture(
  imageFile: File,
  imageName: string
): Promise<THREE.Texture | null> {
  const bitmap = await loadFrustumBitmapFromFile(imageFile, imageName);
  if (!bitmap) return null;

  // Check if texture already exists
  const existing = activeTextures.get(imageName);
  if (existing) {
    existing.lastUsed = Date.now();
    return existing.texture;
  }

  return createTextureFromBitmap(bitmap, imageName);
}

/**
 * Hook to get a frustum texture with caching and optimization.