fromFlatbuffer static method

PhysicallyBasedMaterial fromFlatbuffer(Material fbMaterial, List<Texture> textures)

Implementation

static PhysicallyBasedMaterial fromFlatbuffer(
  fb.Material fbMaterial,
  List<gpu.Texture> textures,
) {
  if (fbMaterial.type != fb.MaterialType.kPhysicallyBased) {
    throw Exception('Cannot unpack PBR material from non-PBR material');
  }

  PhysicallyBasedMaterial material = PhysicallyBasedMaterial();

  // Base color.

  if (fbMaterial.baseColorFactor != null) {
    material.baseColorFactor = Vector4(
      fbMaterial.baseColorFactor!.r,
      fbMaterial.baseColorFactor!.g,
      fbMaterial.baseColorFactor!.b,
      fbMaterial.baseColorFactor!.a,
    );
  }

  if (fbMaterial.baseColorTexture >= 0 &&
      fbMaterial.baseColorTexture < textures.length) {
    material.baseColorTexture = textures[fbMaterial.baseColorTexture];
  }

  // Metallic-roughness.

  material.metallicFactor = fbMaterial.metallicFactor;
  material.roughnessFactor = fbMaterial.roughnessFactor;

  debugPrint('Total texture count: ${textures.length}');
  if (fbMaterial.metallicRoughnessTexture >= 0 &&
      fbMaterial.metallicRoughnessTexture < textures.length) {
    material.metallicRoughnessTexture =
        textures[fbMaterial.metallicRoughnessTexture];
  }

  // Normal.

  if (fbMaterial.normalTexture >= 0 &&
      fbMaterial.normalTexture < textures.length) {
    material.normalTexture = textures[fbMaterial.normalTexture];
  }

  material.normalScale = fbMaterial.normalScale;

  // Emissive.

  if (fbMaterial.emissiveFactor != null) {
    material.emissiveFactor = Vector4(
      fbMaterial.emissiveFactor!.x,
      fbMaterial.emissiveFactor!.y,
      fbMaterial.emissiveFactor!.z,
      1,
    );
  }

  if (fbMaterial.emissiveTexture >= 0 &&
      fbMaterial.emissiveTexture < textures.length) {
    material.emissiveTexture = textures[fbMaterial.emissiveTexture];
  }

  // Occlusion.

  material.occlusionStrength = fbMaterial.occlusionStrength;

  if (fbMaterial.occlusionTexture >= 0 &&
      fbMaterial.occlusionTexture < textures.length) {
    material.occlusionTexture = textures[fbMaterial.occlusionTexture];
  }

  return material;
}