syntax = "proto2";

package earth.proto;

message BulkMetadataRequest {
    optional NodeKey node_key = 1;
}

message NodeDataRequest {
    optional NodeKey node_key = 1;
    optional Texture.Format texture_format = 2;
    optional uint32 imagery_epoch = 3;
}

message NodeKey {
    optional string path = 1;
    optional uint32 epoch = 2;
}

message CopyrightRequest {
    optional uint32 epoch = 1;
}

message TextureDataRequest {
    optional NodeKey node_key = 1;
    optional Texture.Format texture_format = 2;
    optional Texture.ViewDirection view_direction = 3;
}

message BulkMetadata {
    repeated NodeMetadata node_metadata = 1;
    optional NodeKey head_node_key = 2;
    repeated double head_node_center = 3 [packed = true];
    repeated float meters_per_texel = 4 [packed = true];
    optional uint32 default_imagery_epoch = 5;
    optional uint32 default_available_texture_formats = 6;
    optional uint32 default_available_view_dependent_textures = 7;
    optional uint32 default_available_view_dependent_texture_formats = 8;
}

message NodeMetadata {
    optional uint32 path_and_flags = 1;
    optional uint32 epoch = 2;
    optional uint32 bulk_metadata_epoch = 5;
    optional bytes oriented_bounding_box = 3;
    optional float meters_per_texel = 4;
    repeated double processing_oriented_bounding_box = 6 [packed = true];
    optional uint32 imagery_epoch = 7;
    optional uint32 available_texture_formats = 8;
    optional uint32 available_view_dependent_textures = 9;
    optional uint32 available_view_dependent_texture_formats = 10;
    
    enum Flags {
        RICH3D_LEAF = 1;
        RICH3D_NODATA = 2;
        LEAF = 4;
        NODATA = 8;
        USE_IMAGERY_EPOCH = 16;
    }
}

message NodeData {
    repeated double matrix_globe_from_mesh = 1 [packed = true];
    repeated Mesh meshes = 2;
    repeated uint32 copyright_ids = 3;
    optional NodeKey node_key = 4;
    repeated double kml_bounding_box = 5 [packed = true];
    optional Mesh water_mesh = 6;
    repeated Mesh overlay_surface_meshes = 7;
    optional bytes for_normals = 8;
}

message Mesh {
    optional bytes vertices = 1;
    optional bytes vertex_alphas = 9;
    optional bytes texture_coords = 2;
    repeated int32 indices = 3 [packed = true];
    optional bytes octant_ranges = 4;
    optional bytes layer_counts = 5;
    repeated Texture texture = 6;
    optional bytes texture_coordinates = 7;
    repeated float uv_offset_and_scale = 10 [packed = true];
    optional bytes layer_and_octant_counts = 8;
    optional bytes normals = 11;
    optional bytes normals_dev = 16;
    optional uint32 mesh_id = 12;
    optional bytes skirt_flags = 13;
    
    enum Layer {
        OVERGROUND = 0;
        TERRAIN_BELOW_WATER = 1;
        TERRAIN_ABOVE_WATER = 2;
        TERRAIN_HIDDEN = 3;
        WATER = 4;
        WATER_SKIRTS = 5;
        WATER_SKIRTS_INVERTED = 6;
        OVERLAY_SURFACE = 7;
        OVERLAY_SURFACE_SKIRTS = 8;
        NUM_LAYERS = 9;
    }
    
    enum LayerMask {
        TERRAIN_WITH_OVERGROUND = 7;
        TERRAIN_WITH_WATER = 28;
        TERRAIN_WITHOUT_WATER = 14;
    }
}

message Texture {
    repeated bytes data = 1;
    
    optional Format format = 2;
    enum Format {
        JPG = 1;
        DXT1 = 2;
        ETC1 = 3;
        PVRTC2 = 4;
        PVRTC4 = 5;
        CRN_DXT1 = 6;
    }
    
    optional uint32 width = 3 [default = 256];
    optional uint32 height = 4 [default = 256];
    
    optional ViewDirection view_direction = 5;
    enum ViewDirection {
        NADIR = 0;
        NORTH_45 = 1;
        EAST_45 = 2;
        SOUTH_45 = 3;
        WEST_45 = 4;
    }
    
    optional uint32 mesh_id = 6;
}

message TextureData {
    optional NodeKey node_key = 1;
    repeated Texture textures = 2;
}

message Copyrights {
    repeated Copyright copyrights = 1;
}

message Copyright {
    optional uint32 id = 1;
    optional string text = 2;
    optional string text_clean = 3;
}

message PlanetoidMetadata {
    optional NodeMetadata root_node_metadata = 1;
    optional float radius = 2;
    optional float min_terrain_altitude = 3;
    optional float max_terrain_altitude = 4;
}