I don't know is that an issue or bug, but when I use overflow: hidden, selecting the text and moving the cursor to the page bottom in IE, the page is scrolling (I tried IE9-IE11)! When I use Firefox/Opera/Chrome/Safari the page isn't scrolling... I have to use overflow: hidden, but it has an odd behavior in IE.
So, my question is: how can I avoid page scrolling in IE?
Use -ms-scroll-limit: 0 0 0 0; to prevent any scrolling whatsoever in IE 10+.
For older browsers you can write a workaround using JavaScript.
Example of CSS and JavaScript:
body {
overflow: hidden;
-ms-scroll-limit: 0 0 0 0;
}
window.onscroll = function (event) {
window.scrollTo(0, 0);
}
window.onscroll = function (event) {
window.scrollTo(0, 0);
}
body {
overflow: hidden;
-ms-scroll-limit: 0 0 0 0;
}
We choose to go to the moon in this decade and do the other things, not because they are easy, but because they are hard, because that goal will serve to organize and measure the best of our energies and skills, because that challenge is one that we are willing to accept, one we are unwilling to postpone, and one which we intend to win.
We choose to go to the moon in this decade and do the other things, not because they are easy, but because they are hard, because that goal will serve to organize and measure the best of our energies and skills, because that challenge is one that we are willing to accept, one we are unwilling to postpone, and one which we intend to win.
Never in all their history have men been able truly to conceive of the world as one: a single sphere, a globe, having the qualities of a globe, a round earth in which all the directions eventually meet, in which there is no center because every point, or none, is center — an equal earth which all men occupy as equals. The airman's earth, if free men make it, will be truly round: a globe in practice, not in theory.
What was most significant about the lunar voyage was not that man set foot on the Moon but that they set eye on the earth.
If you could see the earth illuminated when you were in a place as dark as night, it would look to you more splendid than the moon.
When I orbited the Earth in a spaceship, I saw for the first time how beautiful our planet is. Mankind, let us preserve and increase this beauty, and not destroy it!
Buy why, some say, the moon? Why choose this as our goal? And they may as well ask why climb the highest mountain?
Across the sea of space, the stars are other suns.
Many say exploration is part of our destiny, but it’s actually our duty to future generations and their quest to ensure the survival of the human species.
As we got further and further away, it [the Earth] diminished in size. Finally it shrank to the size of a marble, the most beautiful you can imagine. That beautiful, warm, living object looked so fragile, so delicate, that if you touched it with a finger it would crumble and fall apart. Seeing this has to change a man.
If you could see the earth illuminated when you were in a place as dark as night, it would look to you more splendid than the moon.
We have an infinite amount to learn both from nature and from each other
To go places and do things that have never been done before – that’s what living is all about.
Spaceflights cannot be stopped. This is not the work of any one man or even a group of men. It is a historical process which mankind is carrying out in accordance with the natural laws of human development.
Space, the final frontier. These are the voyages of the Starship Enterprise. Its five-year mission: to explore strange new worlds, to seek out new life and new civilizations, to boldly go where no man has gone before.
To be the first to enter the cosmos, to engage, single-handed, in an unprecedented duel with nature—could one dream of anything more?
We have an infinite amount to learn both from nature and from each other
Many say exploration is part of our destiny, but it’s actually our duty to future generations and their quest to ensure the survival of the human species.
NASA is not about the ‘Adventure of Human Space Exploration’…We won’t be doing it just to get out there in space – we’ll be doing it because the things we learn out there will be making life better for a lot of people who won’t be able to go.
Never in all their history have men been able truly to conceive of the world as one: a single sphere, a globe, having the qualities of a globe, a round earth in which all the directions eventually meet, in which there is no center because every point, or none, is center — an equal earth which all men occupy as equals. The airman's earth, if free men make it, will be truly round: a globe in practice, not in theory.
Where ignorance lurks, so too do the frontiers of discovery and imagination.
Astronomy compels the soul to look upward, and leads us from this world to another.
We have an infinite amount to learn both from nature and from each other
Curious that we spend more time congratulating people who have succeeded than encouraging people who have not.
Where ignorance lurks, so too do the frontiers of discovery and imagination.
Curious that we spend more time congratulating people who have succeeded than encouraging people who have not.
Where ignorance lurks, so too do the frontiers of discovery and imagination.
A Chinese tale tells of some men sent to harm a young girl who, upon seeing her beauty, become her protectors rather than her violators. That's how I felt seeing the Earth for the first time. I could not help but love and cherish her.
What was most significant about the lunar voyage was not that man set foot on the Moon but that they set eye on the earth.
That's one small step for [a] man, one giant leap for mankind.
(overflow: hidden is apparently inconsistent across browsers, but I do not know which browser does it right.)
Have you looked at the -ms-overflow-style property?
-ms-overflow-style: none;
More information available here: http://msdn.microsoft.com/en-us/library/ie/hh771902(v=vs.85).aspx
I have a solution for it but not sure that this is the right way or not but you can try it.
http://jsfiddle.net/b5DYf/1/
html{
position:fixed;
}
Related
I'm pretty new to Inform and it seems like this shouldn't be too hard to do but I haven't yet found a way. I want to change a room's description based on where the player came from. Something along the lines of:
The Town Square is a room. "As you enter the small town square, [if yourself came from West]
the rising sun makes silhouettes of the roofs and spires to the East.[otherwise]your long
shadow strides before you as the Sun rises behind.[end if]"
What's the best way to go about this?
I found a reasonable solution:
The last location is a room that varies.
Orientation is a direction that varies.
Before going to anywhere, now the last location is the location of the player.
After going to anywhere:
now orientation is the best route from the last location to the location, using even locked doors;
continue the action.
The Town Square is a room. "As you enter the small town square, [if orientation is east]
the rising Sun makes silhouettes of the roofs and spires to the East.[otherwise if orientation is west]
your long shadow strides before you as the Sun rises behind.[end if]"
The "using even locked doors" modifier ensures this will work even if a door closes and locks behind the player. The solution does assume that the player has come via a reversible route, which may not always be the case e.g. if the player has teleported.
I have a number of things I want to restrict from fitting through specific doors. So the chair is too big/heavy to carry but can be pushed through room to room in most cases. Except if the door is narrow. I can probably write specific code successfully to handle a specific case, but I want to handle this generically so I can have a number of bulky things and narrow doors.
The follow code functionally works, however the second noun ends up "nothing". I would like to use the name of the door in the direction of travel to respond to "push chair s" with the message "The chair is way too bulky to fit through the crack". Any ideas what I am doing wrong or another way of doing this?
A thing can be bulky. A thing is usually not bulky.
A bulky thing is usually pushable between rooms.
A door can be narrow. A door is usually not narrow.
A bulky, enterable supporter called the chair is in room1.
There is a narrow door called the crack. It is south of room1.
Before going with a bulky thing through a narrow door:
say "[The noun] is way too bulky to fit through [the second noun]." instead;
You can name the things in the rule preamble and use those names to print them in the rule.
Before going with a bulky thing (called the cargo) through a narrow door (called the obstacle):
say "[The cargo] is way too bulky to fit through [the obstacle]." instead.
I'm working on a game (using Game Maker: Studio Professional v1.99.355) that needs to have both user-modifiable level geometry and AI pathfinding based on platformer physics. Because of this, I need a way to dynamically figure out which platforms can be reached from which other platforms in order to build a node graph I can feed to A*.
My current approach is, more or less, this:
For each platform consider each other platform in the level.
For each of those platforms, if it is obviously unreachable (due to being higher than the maximum jump height, for example) do not form a link and move on to next platform.
If a link seems possible, place an ai_character instance on the starting platform and (within the current step event) simulate a jump attempt.
3.a Repeat this jump attempt for each possible starting position on the starting platform.
If this attempt is successful, record the data necessary to replicate it in real time and move on to the next platform.
If not, do not form a link.
Repeat for all platforms.
This approach works, more or less, and produces a link structure that when visualised looks like this:
linked platforms (Hyperlink because no rep.)
In this example the mostly-concealed pink ghost in the lower right corner is trying to reach the black and white box. The light blue rectangles are just there to highlight where recognised platforms are, the actual platforms are the rows of grey boxes. Link lines are green at the origin and red at the destination.
The huge, glaring problem with this approach is that for a level of only 17 platforms (as shown above) it takes over a second to generate the node graph. The reason for this is obvious, the yellow text in the screen centre shows us how long it took to build the graph: over 24,000(!) simulated frames, each with attendant collision checks against every block - I literally just run the character's step event in a while loop so everything it would normally do to handle platformer movement in a frame it now does 24,000 times.
This is, clearly, unacceptable. If it scales this badly at a mere 17 platforms then it'll be a joke at the hundreds I need to support. Heck, at this geometric time cost it might take years.
In an effort to speed things up, I've focused on the other important debugging number, the tests counter: 239. If I simply tried every possible combination of starting and destination platforms, I would need to run 17 * 16 = 272 tests. By figuring out various ways to predict whether a jump is impossible I have managed to lower the number of expensive tests run by a whopping 33 (12%!). However the more exceptions and special cases I add to the code the more convinced I am that the actual problem is in the jump simulation code, which brings me at long last to my question:
How would you determine, with complete reliability, whether it is possible for a character to jump from one platform to another, preferably without needing to simulate the whole jump?
My specific platform physics:
Jumps are fixed height, unless you hit a ceiling.
Horizontal movement has no acceleration or inertia.
Horizontal air control is allowed.
Further info:
I found this video, which describes a similar problem but which doesn't provide a good solution. This is literally the only resource I've found.
You could limit the amount of comparisons by only comparing nearby platforms. I would probably only check the horizontal distance between platforms, and if it is wider than the longest jump possible, then don't bother checking for a link between those two. But you might have done this since you checked for the max height of a jump.
I glanced at the video and it gave me an idea. Instead of looking at all platforms to find which jumps are impossible, what if you did the opposite? Try placing an AI character on all platforms and see which other platforms they can reach. That's certainly easier to implement if your enemies can't change direction in midair though. Oh well, brainstorming is the key to finding something.
Several ideas you could try out:
Limit the amount of comparisons you need to make by using a spatial data structure, like a quad tree. This would allow you to severely limit how many platforms you're even trying to check. This is mostly the same as what you're currently doing, but a bit more generic.
Try to pre-compute some jump trajectories ahead of time. This will not catch all use cases that you have - as you allow for full horizontal control - but might allow you to catch some common cases more quickly
Consider some kind of walkability grid instead of a link generation scheme. When geometry is modified, compute which parts of the level are walkable and which are not, with some resolution (something similar to the dimensions of your agent might be good starting point). You could also filter them with a height, so that grid tiles that are higher than your jump height, and you can't drop from a higher place on to them, are marked as unwalkable. Then, when you compute your pathfinding, as part of your pathfinding step you can compute when you start a jump, if a path is actually executable ('start a jump, I can go vertically no more than 5 tiles, and after the peak of the jump, i always fall down vertically with some speed).
OK, I was just fooling around in my spare time and have made this cool interface and game-playing code for a Connect-4 type game, written in Flex and playable by 2 human players in Flash. It accurately detects wins, etc. I'm smart enough to know that I've done the easy part.
Before I dig into an AI for game play, I wanted to ask if this is the kind of thing that can really be handled computationally by a Flash plugin. It seems to me that for every turn up until the end there are 8 possible moves, 8 responses to each move, etc. So wouldn't a perfect engine have to be able to potentially see 8^8 moves (over 16 million), and a fairly good engine see up to a million? I don't know game coding so this is new to me. What's a reasonable move horizon for such a game to be able to see?
Connect-4 has been solved mathmatically, so your AI could win every time (if it plays first) with the right database of correct moves.
Otherwise, your brute-force 'looking ahead' scenario would not be as easy as you suggest: connect-4 has a 7 wide by 6 high board (yours may be different) - so the longest game could take 42 turns (7 possible moves each time, or fewer towards the end), so a perfect engine might potentially need nearly 7^42 moves (ie more than 3x10^35)... this is obviously a LOT more than 16 million.
It would still be an interesting project, though...
I have experimented with a sigmoid and logarithmic fade out for volume over a period of about half a second to cushion pause and stop and prevent popping noises in my music applications.
However neither of these sound "natural". And by this I mean, they sound botched. Like an amateur engineer was in charge of the sound decks.
I know the ear is logarithmic when it comes to volumes, or at least, twice as much power does not mean twice as loud. Is there a magic formula for volume fading? Thanks.
I spent many of my younger years mixing music recordings, live concerts and being a DJ for my school's radio station and the one thing I can tell you is that where you fade is also important.
Fading in on an intro or out during the end of a song sounds pretty natural as long as there are no vocals, but some of these computerized radio stations will fade ANYWHERE in a song to make the next commercial break ... I don't think there's a way to make that sound good.
In any case, I'll also answer the question you asked ... the logarithmic attenuation used for adjusting audio levels is generally referred to as "audio taper". Here's an excellent article that describes the physiology of human hearing in relation to the electronics we now use for our entertainment. See: http://tangentsoft.net/audio/atten.html.
You'll want to make sure that the end of the fade out is at a "zero crossing" in the waveform.
Half a second is pretty fast. You might just want to extend the amount of time, unless it must be that fast. Generally 2 or 3 seconds is more natural.
More on timing, it should really be with the beat rate of the music, and end at a natural point in the rhythm. Try getting the BPM of the song (this can be calculated roughly), and fading out over an interval equal to a whole or half note in that timing.
You might also try slowing down the playback speed while you're fading out. This will give a more natural vinyl record or magnetic tape sounding stop/pause. Linearly reduce playback speed while logarithmically reducing volume over the period of 1 second.
If you're just looking to get a clean sound sound when pausing or stopping playback then there's no need to fade at all - just find a zero-crossing point and stop there (or more realistically just fill the rest of that final buffer with silence). Fading out when the user expects the sound to stop immediately will sound unnatural, as you've noticed, because the result is decoupled from the action.
The reason for stopping at a zero-crossing point is that zero is the steady state value while the audio is stopped, so the transition between the two states is seamless. If you stop playback when the last sample's amplitude is large then you are effectively introducing transients into the audio from the point of view of the audio hardware when it reconstructs the analogue signal, which will be audible as pops and/or clicks.
Another approach is to fade to zero very fast (~< 10mS), which effectively achieves the same thing as the zero-crossing technique.