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<!DOCTYPE html>
<html>
<head>
<title>PlayCanvas Sprite Button</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
<link rel="icon" type="image/png" href="../playcanvas-favicon.png" />
<script src="../../build/playcanvas.js"></script>
<script src="../../build/playcanvas-extras.js"></script>
<style>
body {
margin: 0;
overflow-y: hidden;
}
</style>
</head>
<body>
<!-- The canvas element -->
<canvas id="application-canvas"></canvas>
<!-- The script -->
<script>
var canvas = document.getElementById("application-canvas");
// Create the application and start the update loop
var app = new pc.Application(canvas, {
mouse: new pc.Mouse(document.body),
touch: new pc.TouchDevice(document.body),
elementInput: new pc.ElementInput(canvas)
});
app.start();
// Set the canvas to fill the window and automatically change resolution to be the same as the canvas size
app.setCanvasFillMode(pc.FILLMODE_FILL_WINDOW);
app.setCanvasResolution(pc.RESOLUTION_AUTO);
window.addEventListener("resize", function () {
app.resizeCanvas(canvas.width, canvas.height);
});
var miniStats = new pcx.MiniStats(app);
// Create a camera
var camera = new pc.Entity();
camera.addComponent("camera", {
clearColor: new pc.Color(0, 0, 0)
});
app.root.addChild(camera);
// Create a 2D screen
var screen = new pc.Entity();
screen.addComponent("screen", {
referenceResolution: new pc.Vec2(1280, 720),
scaleBlend: 0.5,
scaleMode: pc.SCALEMODE_BLEND,
screenSpace: true
});
app.root.addChild(screen);
// Create a simple button
var button = new pc.Entity();
button.addComponent("button", {
active: true,
imageEntity: button,
transitionMode: pc.BUTTON_TRANSITION_MODE_SPRITE_CHANGE
});
button.addComponent("element", {
anchor: [0.5, 0.5, 0.5, 0.5],
height: 64,
pivot: [0.5, 0.5],
type: pc.ELEMENTTYPE_IMAGE,
width: 175,
useInput: true
});
screen.addChild(button);
// Create a label for the button
var label = new pc.Entity();
label.addComponent("element", {
anchor: [0.5, 0.5, 0.5, 0.5],
color: new pc.Color(1, 1, 1),
fontSize: 32,
height: 64,
opacity: 0.5,
pivot: [0.5, 0.5],
text: "CLICK ME",
type: pc.ELEMENTTYPE_TEXT,
width: 128,
wrapLines: true
});
button.addChild(label);
// Change the background color every time the button is clicked
button.button.on('click', function (e) {
var r = Math.random();
camera.camera.clearColor = new pc.Color(r, r, r);
});
// Move the button's label with the animation of the sprite
button.button.on('pressedstart', function () {
label.translateLocal(0, -4, 0);
});
button.button.on('pressedend', function () {
label.translateLocal(0, 4, 0);
});
// Load a font
var fontAsset = new pc.Asset('arial.json', "font", { url: "../assets/fonts/arial.json" });
fontAsset.on('load', function () {
// Apply the font to the text element
label.element.fontAsset = fontAsset;
});
app.assets.add(fontAsset);
app.assets.load(fontAsset);
var textureAsset = new pc.Asset('red_button_atlas.png', "texture", { url: "../assets/button/red_button_atlas.png" });
textureAsset.on('load', function () {
var texture = textureAsset.resource;
texture.addressU = pc.ADDRESS_CLAMP_TO_EDGE;
texture.addressV = pc.ADDRESS_CLAMP_TO_EDGE;
texture.minFilter = pc.FILTER_NEAREST;
texture.magFilter = pc.FILTER_NEAREST;
var atlas = new pc.TextureAtlas();
atlas.frames = {
"0": {
rect: new pc.Vec4(0, 147, 190, 49),
pivot: new pc.Vec2(0.5, 0.5),
border: new pc.Vec4(7, 11, 7, 7)
},
"1": {
rect: new pc.Vec4(0, 98, 190, 49),
pivot: new pc.Vec2(0.5, 0.5),
border: new pc.Vec4(7, 11, 7, 7)
},
"2": {
rect: new pc.Vec4(0, 49, 190, 49),
pivot: new pc.Vec2(0.5, 0.5),
border: new pc.Vec4(7, 11, 7, 7)
},
"3": {
rect: new pc.Vec4(0, 0, 190, 49),
pivot: new pc.Vec2(0.5, 0.5),
border: new pc.Vec4(7, 11, 7, 7)
}
};
atlas.texture = texture;
var createSpriteAsset = function (frame) {
var sprite = new pc.Sprite(app.graphicsDevice, {
atlas: atlas,
frameKeys: frame,
pixelsPerUnit: 1,
renderMode: pc.SPRITE_RENDERMODE_SIMPLE
});
var spriteAsset = new pc.Asset('sprite', 'sprite', { url: '' });
spriteAsset.resource = sprite;
spriteAsset.loaded = true;
app.assets.add(spriteAsset);
return spriteAsset;
};
button.element.spriteAsset = createSpriteAsset('0');
button.button.hoverSpriteAsset = createSpriteAsset('1');
button.button.pressedSpriteAsset = createSpriteAsset('2');
button.button.inactiveSpriteAsset = createSpriteAsset('3');
});
app.assets.add(textureAsset);
app.assets.load(textureAsset);
</script>
</body>
</html>