This repository was archived by the owner on Jan 4, 2023. It is now read-only.
api calculate index
Converts an X and Y position into an index value. This is useful for finding positions in 1D arrays that represent 2D data.
CalculateIndex ( x, y, width )| Name | Value | Description |
|---|---|---|
| x | int | The x position. |
| y | int | The y position. |
| width | int | The width of the data if it was represented as a 2D array. |
| Value | Description |
|---|---|
| int | Returns an int value representing the X and Y position in a 1D array. |
In this example, we will treat a 1D as a 2D array and get a value from it based on an X, Y position. Running this code will output the following:
-- A 1D array of example values
local exampleGrid = {
"A", "B", "C",
"D", "E", "F",
"G", "H", "I",
}
function Init()
-- Example Title
DrawText("CalculateIndex()", 8, 8, DrawMode.TilemapCache, "large", 15)
DrawText("Lua Example", 8, 16, DrawMode.TilemapCache, "medium", 15, -4)
-- Calculate the center index based on a grid with 3 columns
local index = CalculateIndex(1, 1, 3)
-- Draw the index and value to the display
DrawText("Position 1,1 is Index " .. index .. " is " .. exampleGrid[index], 1, 4, DrawMode.Tile, "large", 15)
end
function Draw()
-- Redraw the display
RedrawDisplay()
endnamespace PixelVision8.Player
{
class CalculateIndexExample : GameChip
{
// A 1D array of example values
private string[] exampleGrid =
{
"A", "B", "C",
"D", "E", "F",
"G", "H", "I",
};
public override void Init()
{
// Example Title
DrawText("CalculateIndex()", 8, 8, DrawMode.TilemapCache, "large", 15);
DrawText("C Sharp Example", 8, 16, DrawMode.TilemapCache, "medium", 15, -4);
// Calculate the center index based on a grid with 3 columns
var index = CalculateIndex(1, 1, 3);
// Draw the index and value to the display
DrawText("Position 1,1 is Index " + index + " is " + exampleGrid[index], 1, 4, DrawMode.Tile, "large",
15);
}
public override void Draw()
{
// Redraw the display
RedrawDisplay();
}
}
}