Hole Html

Hole Html
Control your black hole, eating up everything on your way. The bigger you get, the larger structures you are able to suck in. Keep an eye on the opponents’ size, too. They can eat you.
Absorb everyone into your black hole in the new game - Hole.io
Control your round hole and consume everything on your path: cars, houses, people! Engage in battles with other
holes in the same city. Grow bigger and more powerful but beware of other players & their holes may be bigger than
yours and pull you in.
This game literally sucks you in! Try to become the biggest in the city.
The gameplay is very easy to get into: all you need to do is move the hole around and let various objects drop into it and disappear into the unknown. The trick is to only go under the objects that can fit inside: start with consuming pedestrians, poles and bushes, move on to cars and ultimately to large buildings. You can also eat other black holes if they are smaller than you.
The game takes place in a city area, so the map is comprised of office buildings, apartment complexes, parking lots, roads parks and many other areas usually associated with urban environment. The surroundings are instantly familiar to anyone who has ever seen a big city, so they are pretty easy to navigate. The best game strategy is to plan your way around the areas in advance: think of the most efficient route that will give you enough smaller objects in the beginning and will eventually introduce something bigger and bigger to chew on.
Each round only takes a couple of minutes, so don’t get discouraged if you don’t win right away: once you’ve familiarized yourself with the level and the mechanics you will become the master of Hole.io in no-time!
In this rather unique combination of arcade and puzzle there are lots of little things you can do to outsmart the competition and best every single one of your opponents. Here’s a basic list of effective moves and helpful tips.
Since the main mechanic is physics-based it is important to adjust your movement when trying to consume an object. Let’s say you want to eat some traffic lights: sometimes sliding under a vertical pole makes it fall in an unwanted direction and ultimately drop flat on the floor horizontally, thus preventing you from being able to eat it. To prevent that from happening you might want to slow down just a bit or move slightly backwards once the pole start moving in an unwanted direction.
It is possible to get larger objects and buildings fall in even if your hole is not big enough: simply place yourself under one of the edges of the object for it to start leaning into the singularity and then move slowly towards its other end gradually consuming the rest.
It may be more important to swallow more smaller stuff than fewer big structures. It is common to feel inclined to try and consume huge buildings once the hole gets big enough, however it is a bit of a risk because it’s possible to underestimate the size of an object. If it won’t fit inside, you will end up wasting your time. Instead spend some time adjusting to your new size by going for smaller prey.
If you have been having trouble making it to the top of the score board and besting other players, these tips will hopefully help you overcome some of the major difficulties. Ultimately, we tend to produce best results after entering that focused meditative flow state of mind, but you need to become really comfortable and familiar with the game in order to achieve it. Good luck becoming the best at Hole.io!

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// properties
// - outer square
var outerLength = 200;
// - inner length
var innerLength = outerLength / 2;

// cnavas
var canvas = document.getElementById('canvas');
var width = canvas.width = document.body.clientWidth;
var height = canvas.height = document.body.clientHeight;
var context = canvas.getContext('2d');

// path
// - outer square
context.rect(
(width - outerLength) / 2,
(height - outerLength) / 2,
outerLength,
outerLength
);
// - inner square
var x0 = (width - innerLength) / 2;
var y0 = (height - innerLength) / 2;
context.moveTo(x0, y0);
context.rect(
x0,
y0,
innerLength,
innerLength
);

// draw
// - stroke
context.lineWidth = 10;
context.stroke();
// - fill
context.fillStyle = 'red';
context.fill('evenodd');
html,
body {
margin: 0;
height: 100%;
overflow: hidden;
}

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4,745 3 3 gold badges 25 25 silver badges 45 45 bronze badges

Not the answer you're looking for? Browse other questions tagged html geometry html5-canvas or ask your own question .

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Using the tag I need to be able to draw a hole in a polygon.
Right now I have something very simple that uses beginPath() then does lineTo() for each point. It is then filled with fill().
I cannot see any way to have a filled polygon with a unfilled middle though, like a donut.
I'm not making a donut but it is suitable for this example.
Is there something I am missing?
I would rather not draw it fully filled then have to redraw the middle.
The main idea here is you can only use beginPath once; the outside polygon must be clockwise and holes must be counter-clockwise.
Your have 2 choices to draw holes with HTML5 canvas.
Choice 1:
Draw outer shape and inner shape in different clock direction.
Outer shape clockwise and inner shape anti clockwise.
Or outer shape clockwise and inner shape anti clockwise.
It's a little pain to detect the shape drawing direction when we are coding.
If you need to detect whether a series of dots is clockwise or not, here is a good function:
If your dots is clockwise but you need counter-clockwise, .reverse() your dots array.
Choice 2:
Use 'evenodd' fill rule, draw your shapes in any direction.
This way is much simpler than the choice 1.
see fill() method API :
fillRule can be "nonzero" or "evenodd"
"nonzero": The non-zero winding rule, which is the default rule.
"evenodd": The even-odd winding rule.
You can use evenodd fill rule: fill('evenodd')
Draw your shape in a clockwise direction (for example). Then you can increase or decrease the radius and go in an anti-clockwise direction.
EDIT: Here's a very simple example of a donut:
There a demonstration of the result on this page:
To help understand it it can be useful to change the context.fill() to context.stroke() and change both of the 2 * Math.PI to 1.5 * Math.PI This makes the example more clear.
It first draws an arc and then draws a second arc with a smaller radius in reverse - and there's a "connecting line" which is drawn implicitly (ie not by the code) from the end of the first arc to the start of the second. The path doesn't need closing but doing so causes no harm. If you're just stroking the donut and not filling it you might prefer this.
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Visualization of the cavity running through the channel structure of gramicidin A
determined by Arseniev and co-workers.
The HOLE representation of the internal surface of the
pore is shown in a multicoloured form produced by
sphqpt program.
Red marks places where the pore radius is below
0.6 Å, green is used where it is in the range 0.6Å to 1.15Å and
blue
marks places where it is above 1.15Å. AMBER values where used for van der Waals
atomic radii (file simple.rad is used). A radius of 1.15Å is the minimum required for
a water molecule showing that this form of gramicidin would be filled with
solvent molecules under normal conditions.

If you are not using a modern version of
n e t sc a p e
then may I recommend you obtain one - its free to non-profit people.
If you do not have access to a web browser then as a last resort postscript
versions of the documentation are available by anonymous ftp.

If anyone else has access to the code/executables mounted in your
space then it is your responsibility to ensure that they abide
by these conditions.

You must reference any use made of HOLE in published work by citing:

Auto Electronics & Electricals (68)
Medical Devices and Accessories (30)
Barrier Properties & Permeation (15)
Processing & Shaping of Plastics (2)

A hole in a part can have many functions, including acting as a fixation point, offering passage to other parts and reducing a parts weight.

The most convenient hole shape is a circular hole. The core pin required, is a common part available in many different sizes and materials. Using core pins also offers some flexibility as replacing a core pin for a slightly bigger or smaller one often only requires minor tool modifications.
Obviously, holes can’t always be circular, and they don’t need to be. Differently shaped holes can be made using custom cores.
From a tool manufacturing point of view, it’s easiest to create a hole with a centerline parallel to the draw direction of the tool. The simple construction of a static core makes it sturdy, low-maintenance and relatively cheap.
Holes with an axis that isn’t parallel to the mold opening direction, are mostly made using retractable pins or split tools. Core pins should be draw polished and include draft to facilitate ejection. In some cases, retractable cores can be avoided: if the part design allows for an extreme taper in the wall, a hole perpendicular to the draw direction can be formed by the main static core.

A hole may be a through hole (or ‘thru-hole’) or a blind hole. A through hole goes all the way through a part's wall. In other words, there’s an opening on both sides. A blind hole, however, has a specific depth, it doesn’t break through to the other side of the workpiece.
Whether the hole goes all the way through or not makes a big difference from a manufacturing point of view. If it does, the core can be supported on both ends. The longer and/or thinner a core is, the more important this is. A core supported on both sides is less likely to bend or even break during injection molding.
When molten material flows around a core pin during injection molding, a weldline occurs on the opposite side of where it first reaches the core. If weldlines are not permissible due to strength or appearance requirements, holes may be partially cored to facilitate drilling as a post-molding operation.
As mentioned above, the length of the core pin, and therefore the depth of the hole, is limited by the ability of the core pin to withstand any deflection imposed on it by the melt during the injection phase. Through holes can be longer than blind holes because their core can be supported on both sides of the mold cavity. The following are some general guidelines for hole dimensioning:
Figure 2 - Blind hole design recommendations
Figure 4 - Minimum hole spacing dimensions

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