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added Demo.views

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liabru 2014-05-01 13:41:15 +01:00
parent 786b9af7a0
commit 4af6c1c64e
2 changed files with 84 additions and 0 deletions
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1
demo/dev.html
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@ -37,6 +37,7 @@
<option value="mixedSolid">Solid Rendering</option> <option value="mixedSolid">Solid Rendering</option>
<option value="newtonsCradle">Newton's Cradle</option> <option value="newtonsCradle">Newton's Cradle</option>
<option value="wreckingBall">Wrecking Ball</option> <option value="wreckingBall">Wrecking Ball</option>
<option value="views">Views</option>
<option value="sprites">Sprites</option> <option value="sprites">Sprites</option>
<option value="pyramid">Pyramid</option> <option value="pyramid">Pyramid</option>
<option value="raycasting">Raycasting</option> <option value="raycasting">Raycasting</option>

83
demo/js/Demo.js
View file

@ -107,6 +107,89 @@
var renderOptions = _engine.render.options; var renderOptions = _engine.render.options;
}; };
Demo.views = function() {
var _world = _engine.world;
Demo.reset();
var stack = Composites.stack(20, 20, 15, 4, 0, 0, function(x, y, column, row) {
switch (Math.round(Common.random(0, 1))) {
case 0:
if (Math.random() < 0.8) {
return Bodies.rectangle(x, y, Common.random(20, 50), Common.random(20, 50));
} else {
return Bodies.rectangle(x, y, Common.random(80, 120), Common.random(20, 30));
}
break;
case 1:
var sides = Math.round(Common.random(1, 8));
sides = (sides === 3) ? 4 : sides;
return Bodies.polygon(x, y, sides, Common.random(20, 50));
}
});
World.add(_world, stack);
// get the centre of the viewport
var viewCentre = {
x: _engine.render.options.width * 0.5,
y: _engine.render.options.height * 0.5
};
// make the world bounds a little bigger than the render bounds
_world.bounds.min.x = -300;
_world.bounds.min.y = -300;
_world.bounds.max.x = 1100;
_world.bounds.max.y = 900;
// use the engine tick event to control our view
_sceneEvents.push(
Events.on(_engine, 'tick', function() {
var world = _engine.world,
mouse = _engine.input.mouse,
render = _engine.render;
// get vector from mouse relative to centre of view
var mouseRelative = Vector.sub(mouse.position, mouse.offset),
deltaCentre = Vector.sub(mouseRelative, viewCentre);
// only translate the view if mouse has moved 200px from the centre
if (Vector.magnitude(deltaCentre) > 200) {
// create a vector to translate the view, allowing the user to control view speed
var translate = {
x: Math.pow(Math.abs(deltaCentre.x), 1.5) * 0.001 * Common.sign(deltaCentre.x),
y: Math.pow(Math.abs(deltaCentre.y), 1.5) * 0.001 * Common.sign(deltaCentre.y)
};
// prevent the view moving outside the world bounds
if (render.bounds.min.x + translate.x < world.bounds.min.x)
translate.x = world.bounds.min.x - render.bounds.min.x;
if (render.bounds.max.x + translate.x > world.bounds.max.x)
translate.x = world.bounds.max.x - render.bounds.max.x;
if (render.bounds.min.y + translate.y < world.bounds.min.y)
translate.y = world.bounds.min.y - render.bounds.min.y;
if (render.bounds.max.y + translate.y > world.bounds.max.y)
translate.y = world.bounds.max.y - render.bounds.max.y;
Bounds.translate(render.bounds, translate);
// we must update the mouse offset too
mouse.offset.x = render.bounds.min.x;
mouse.offset.y = render.bounds.min.y;
}
})
);
// must enable renderOptions.hasBounds for views to work
var renderOptions = _engine.render.options;
renderOptions.hasBounds = true;
};
Demo.mixedSolid = function() { Demo.mixedSolid = function() {
var _world = _engine.world; var _world = _engine.world;