03 - Applying shadows to isometric heightmap
Using the previous isometric tilemap we apply both horizontal and vertical shadows. The horizontal shadows can also be applied in a non isometric map. We have increased the tilemap size and added a secondary green rgba tile as the ground. The shadows are applied via the Tile Layer shadow flag.
require([
'jsiso/canvas/Control',
'jsiso/tile/Field',
'jsiso/img/load',
'requirejs/domReady!'
],
function(CanvasControl, TileField, imgLoad) {
// RGBA of color to use
var tileColor = "(158, 154, 255, 1)";
var groundColor = "(100, 154, 100, 1)";
// Our Tile Map
var tileMap = [
[groundColor, groundColor, groundColor, groundColor, groundColor, groundColor, groundColor],
[groundColor, tileColor, groundColor, tileColor, groundColor, tileColor, groundColor],
[groundColor, tileColor, tileColor, tileColor, groundColor, tileColor, groundColor],
[groundColor, tileColor, groundColor, tileColor, groundColor, tileColor, groundColor],
[groundColor, groundColor, groundColor, groundColor, groundColor, groundColor, groundColor]
]
// Our Height Map
var tileHeightMap = [
[0,0,0,0,0,0,0],
[0,1,0,1,0,1,0],
[0,1,1,1,0,2,0],
[0,4,0,4,0,3,0],
[0,0,0,0,0,0,0]
]
// X & Y drawing position, and tile span to draw
var xrange = 8;
var yrange = 8;
// use CanvasControl to create a simple canvas element
// ID of Canvas,
// width of Canvas,
// Height of Canvas,
// Optioanl: Any Style proprties we wish to apply,
// Optional: The DOM ID location we wish to place the canvas in, otherwise it appends to Body
var context = CanvasControl.create("canavas", 640, 640, {});
var tileLayer = new TileField(context, CanvasControl().height, CanvasControl().width);
var images = [
{
graphics: [
"/img/game/ground/blank-block.png" // The images we want to load using imgLoader
]
}
];
imgLoad(images).then(function(imgResponse) { // imgLoad uses Promises, once the images have loaded we continue and use the returned imgResponse
tileLayer.setup({
layout: tileMap,
isometric: true, // Flag used to layout grid in non isometric format
tileHeight: 50,
tileWidth: 100,
heightMap: {
map: tileHeightMap,
heightTile: imgResponse[0].files["blank-block.png"], // imgResponse[0] contains the files[] we placed in the graphcis array for loading
offset: 0
},
shadow: {
offset: 50, // Offset is the same height as the stack tile
verticalColor: '(5, 5, 30, 0.4)',
horizontalColor: '(6, 5, 50, 0.5)'
}
});
// Rotate our entire Map
tileLayer.rotate("left");
// Set an offset so our map is on screen
tileLayer.setOffset(200, 100)
// Loop through our tiles and draw the map
for (i = 0; i < 0 + xrange; i++) {
for (j = 0; j < 0 + yrange; j++) {
tileLayer.draw(i,j);
}
}
});
});
Check out the View Source to see tutorial.
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