Tilemap

Functions and messages used to manipulate tile map components.

tilemap.get_bounds()

Get the bounds for a tile map. This function returns multiple values: The lower left corner index x and y coordinates (1-indexed), the tile map width and the tile map height.

The resulting values take all tile map layers into account, meaning that the bounds are calculated as if all layers were collapsed into one.

PARAMETERS

RETURN

EXAMPLES

-- get the level bounds.
local x, y, w, h = tilemap.get_bounds("/level#tilemap")

tilemap.get_tile()

Get the tile set at the specified position in the tilemap. The position is identified by the tile index starting at origo with index 1, 1. (see tilemap.set_tile()) Which tile map and layer to query is identified by the URL and the layer name parameters.

PARAMETERS

RETURN

EXAMPLES

-- get the tile under the player.
local tileno = tilemap.get_tile("/level#tilemap", "foreground", self.player_x, self.player_y)

tilemap.reset_constant()

Resets a shader constant for a tile map component. The constant must be defined in the material assigned to the tile map. Resetting a constant through this function implies that the value defined in the material will be used. Which tile map to reset a constant for is identified by the URL.

PARAMETERS

EXAMPLES

function init(self)
    tilemap.reset_constant("#tilemap", "tint")
end

tilemap.set_constant()

Sets a shader constant for a tile map component. The constant must be defined in the material assigned to the tile map. Setting a constant through this function will override the value set for that constant in the material. The value will be overridden until tilemap.reset_constant is called. Which tile map to set a constant for is identified by the URL.

PARAMETERS

EXAMPLES

function init(self)
    tilemap.set_constant("#tilemap", "tint", vmath.vector4(1, 0, 0, 1))
end

tilemap.set_tile()

Replace a tile in a tile map with a new tile. The coordinates of the tiles are indexed so that the "first" tile just above and to the right of origo has coordinates 1,1. Tiles to the left of and below origo are indexed 0, -1, -2 and so forth.

+-------+-------+------+------+
|  0,3  |  1,3  | 2,3  | 3,3  |
+-------+-------+------+------+
|  0,2  |  1,2  | 2,2  | 3,2  |
+-------+-------+------+------+
|  0,1  |  1,1  | 2,1  | 3,1  |
+-------O-------+------+------+
|  0,0  |  1,0  | 2,0  | 3,0  |
+-------+-------+------+------+

The coordinates must be within the bounds of the tile map as it were created. That is, it is not possible to extend the size of a tile map by setting tiles outside the edges. To clear a tile, set the tile to number 0. Which tile map and layer to manipulate is identified by the URL and the layer name parameters.

PARAMETERS

EXAMPLES

-- Clear the tile under the player.
tilemap.set_tile("/level#tilemap", "foreground", self.player_x, self.player_y, 0)

tilemap.set_visible()

Sets the visibility of the tilemap layer

PARAMETERS

EXAMPLES

-- Disable rendering of the layer
tilemap.set_visible("/level#tilemap", "foreground", false)