getDepthMaterial method

Implementation

Material getDepthMaterial(
  Object3D object,
  Material material,
  Light light,
  double shadowCameraNear,
  double shadowCameraFar,
  int type
) {
  Material? result;

  final customMaterial = light is PointLight ? object.customDistanceMaterial : object.customDepthMaterial;

  if (customMaterial != null) {
    result = customMaterial;
  } else {
    result = light is PointLight ? _distanceMaterial : _depthMaterial;

    if ((
      _renderer.localClippingEnabled &&
      material.clipShadows == true &&
      material.clippingPlanes!.isNotEmpty
      ) ||
      (material.displacementMap != null && material.displacementScale != 0 ) ||
      ( material.alphaMap  != null && material.alphaTest > 0 ) ||
      (material.map != null && material.alphaTest > 0)
    ) {
      // in this case we need a unique material instance reflecting the
      // appropriate state

      final keyA = result.uuid;
      final keyB = material.uuid;

      Map? materialsForVariant = _materialCache[keyA];

      if (materialsForVariant == null) {
        materialsForVariant = {};
        _materialCache[keyA] = materialsForVariant;
      }

      Material? cachedMaterial = materialsForVariant[keyB];

      if (cachedMaterial == null) {
        cachedMaterial = result.clone();
        materialsForVariant[keyB] = cachedMaterial;
      }

      result = cachedMaterial;
    }
  }

  result.visible = material.visible;
  result.wireframe = material.wireframe;

  if (type == VSMShadowMap) {
    result.side = (material.shadowSide != null) ? material.shadowSide! : material.side;
  }
  else {
    result.side = (material.shadowSide != null) ? material.shadowSide! : shadowSide[material.side]!;
  }

		result.alphaMap = material.alphaMap;
		result.alphaTest = material.alphaTest;
		result.map = material.map;

  result.clipShadows = material.clipShadows;
  result.clippingPlanes = material.clippingPlanes;
  result.clipIntersection = material.clipIntersection;

  result.wireframeLinewidth = material.wireframeLinewidth;
  result.linewidth = material.linewidth;

  if (light is PointLight == true && result is MeshDistanceMaterial) {
    // result.referencePosition.setFromMatrixPosition(light.matrixWorld);
    // result.nearDistance = shadowCameraNear;
    // result.farDistance = shadowCameraFar;

			final materialProperties = _renderer.properties.get( result );
			materialProperties['light'] = light;
  }

  return result;
}