I'm making a Create-a-Character.One of the features is being able to adjust a facial feature’s placement.E.g. can move the nose up or down
(Through arrow buttons, example: 1 click on up button, move nose up by a little bit.)
But obviously I don't want the eyes or nose or lips floating outside the face or a nose ending up on a forehead that would be strange lol.
So how do I code so that the user can only move a movieclip a set amount of times in the chosen direction?
If you use just arrow buttons to move objects, it is very easy. Once a button is clicked, check object's position and move it if needed. Basic example:
// if arrow up clicked
if (nose.y > 100)
{nose.y -= 2}
// if down arrow clicked
if (nose.y < 140)
{nose.y += 2}
It's same for x axis and obviously, numbers 100 and 140 can be anything you want. It means, move objects just between these points.
User 987 answer is correct, however if your button moves the object at a faster pace say +-5, setting +-2 to the offset might not put it back in the boundary. It will correct itself by +-2 every frame there after, not accounting for if the user continues to hold down the button to try and exceed the boundary further. The nose will continue to glide further away.
The better way to implement this is to immediately set the nose back to the edge of the boundary.
if (nose.y > 140) {
nose.y = 140;
}
Related
My player's arm is programmed to follow my mouse and rotate accordingly and I've programmed bullets to be fired using this rotational value
(Math.atan2(this._dy, this._dx) * 180 / Math.PI
where _dy is the y location of the mouse (-) the y of my player's arm and the _dx is the x location of mouse (-) the y of my player's arm.
However, when I program the player to reflect when the mouse has crossed the x-coordinates, the bullet angle is also reflected. How would I fix this issue?
I've already tried subtracting 180 from the angle but it still doesn't fire towards the direction of the mouse.
First, make sure you have this parent-child-sibling relationship:
"A" should be the parent of "B" and "C". "B" and "C" should have no direct link. Their connection is that they have the same parent. So when you want to move the character, move the parent, and both will move. Now, for the good stuff:
Use key frames and sibling relationship
beginner level approach
Make the character and the arm both children of the same parent display object container (Movie Clip in this case). Now, instead of flipping anything by xScale, which I assume you did, you can just have both MC children (arm and character) go to frame 2 (or whatever is available) where the graphics are flipped.
xScale body, move arm to frame 2, change z order
moderate level approach (best result)*
Alternatively, you could do that same "sibling" setup as above, and then scale the character but not the arm (I think scaling the arm will mess it up again, but you could have the arm go to frame 2 and have it drawn reversed so the thumb and handle are pointing the right way. Bonus points for changing the z stacking order so the arm goes to the other side of the body. xScale for only the body allows you to only have one set of frames for animation of his legs and torso etc. but also avoid scaling the arm at all).
Global properties
advanced approach
A third option is to use global rotation and global points. I won't illustrate that here because I'm not that advanced and it would take me a while to figure out the exact syntax. If you already have mastered global properties, try this; if not, try one of the ones above.
* Example (best result)
if (facingRight == true && stage.mouseX < totalChar.x){
// totalChar is on the stage
// and contains two children:
// armAndGun and bodyHeadLegs
totalChar.armAndGun.gotoAndStop(2);
// in frame 2 of the arm MC, draw the
// arm and gun in the flipped orientation
totalChar.addChild(bodyHeadLegs);
// re-ads body to parent so it's
// z-order is above the arm;
totalChar.bodyHeadLegs.xScale = -1;// flips body and any animation of legs and head
facingRight = false;
// use a variable or property like this
// to keep him from constantly flipping
}
You'll need similar code to flip him back the other way.
I am trying to make a simple arcade shooter like Galaga in TIBasic. I have successfully created some code that lets you move your character (an "X") horizontally across the screen while shooting a bullet that clears everything along the vertical path it takes. However, I'm having a problem with the "rocks" that are supposed to fall from the screen and disappear when hit. When I shoot the rock, it is cleared by the bullet, but then continues going down the screen until it hits the bottom of the screen. Here's the code for the rocks:
//outside the game loop:
1->R
//inside game loop:
If not(R=8)
Then
R+1->R
If R>1
Then
Output(E-1, 1, " " //removes last rock
End
Output(R, 1, "R" //replaces last rock with one below it (traveling towards the ground)
End
This code obviously doesn't stop the "R" from continuing to go down the screen when it is cleared (by the way, I just use Output(...," ") on wherever the bullet was to clear away anything the bullet hits). So, how would I check if the rock was cleared away on the last iteration of the game loop? Is there a way to check if something (the "R") is at a certain place on the screen in order to check if it was cleared away by a bullet on the last iteration? Or is there a better way? Thanks for the help!
It appears that the code you have doesn't test if the bullet is in the same place as the rock. To have this collision, you'd need to compare the "R" y-value of the rock with the y-value of your bullet you displayed, and compare the x-value of the rock (however you store that) with the x-value of the bullet. If both are equal to each other, then they have collided, and you can "delete" the rock by setting it to whatever value signifies it doesn't exist anymore. Assuming R is the y-value of the rock, S is the x-value of the rock, Y is the y-value of the bullet, and X is the x-value of the bullet, In the code to move the rock, I'd put this somewhere:
:If R=Y and S=X
:DelVar R
//You could also delete the bullet here because it's "stopped" by the rock
This code will test if the two are collided and set R to 0 (meaning it doesn't exist). If you wanted, you could also add a text-version of an explosion to give it some more flair. Good luck with your project, and I hoped this helped!
When making a game in Ti-Basic, there are 2 options for which "screen" to put it on: The text screen of the calculator, using functions like Disp and Output, and the graph screen, using Text, as well as the drawing functions, stored pictures, and pxl and pt functions. I'm not sure about how to check the text out put screen for the presence of an object on the screen, but the graph function has the Pxl-Test function:
:Pxl-Test(y,x)
Someone else may have know how to check for something on the text screen, but I suggest switching to the graph screen to make use of this function.
If you are going to switch to using the graph output here are some things to note:
The text function is
:Text(row,col,output)
Row and col are switched from the Output function
Rows and cols are measured in pixels on the screen, as opposed to the space it takes to type a letter
Most letters are 3 pixels wide, spaces are 1 pixel wide, so it will take multiple spaces to clear out an unwanted character
You may need to disable the graph axis (FORMAT menu), the y-functions (VARS menu, then right to Y-VARS), and the stat-plots (STAT PLOT menu) in the begging of the program then restore them at the end.
One last not on using the Pxl-Test function is that it tests a group of pixels, while a letter. For now let's pretend you only use Rs and an X in your program (I don't know if you do or don't), so you should test a spot on that character that is relatively unique to that character.
Good luck!
I have created a game where you have to follow the suggested arrow (going from right to left) to control the movement of the character. As you go trace the arrow from right to left, the characters position changes and he rubs his forehead. I wanted it to be very interactive, so you feel like you are controlling the character. As he rub his forehead, I want the "heat meter" to increase, and after it reaches hot, the level is completed. Is this even possible with Actionscript 3? Thank you in advance for letting me know, and if it is, how would I go about setting this up. I am very new to AS3. :/
Use gotoAndStop() to navigate to the head scratching menu using if statements (if(var thinking:Boolean == true) and to the heat meter: if(character.currentFrame == "scratchinghead") { var heatmeter:int ++; }
Then to win: if(heatmeter > 99) { gotoAndStop("win"); }
To check if the mouse is hovering, use MOUSE_ROLL_OVER.
i've been making a twist on the labyrinth game and i've got my ball to move with physics but im struggling with getting it to hit the walls around it. its currently a movie clip with black walls, and ive used this code to try and stop it:
if (character.hitTestObject(walls)){
character.x = //something
character.y = //something
}
all this does is when it hits any part of the movie clip, (even the blank spaces) it moves my character,
is there any sort of code i can use to maybe detect hitting a certain colour?
One way you could do this, is to use hitTestPoint() method to test if any of the corners have hit your wall.
hitTestPoint() tests only a single location to see if that point collides with an object. This is how you could test the top left corner of your character to see if it's touching the wall :
// I am assuming that x,y is the top left corner of your character
if (wall.hitPointTest(character.x, character.y, true))
{
// top left collided with wall
{
So you could do the same for all corners, or if you want, you can determine any collision points you want to check for the character.
Depending on your level of precision, this method might work just fine for your needs. But if you want pixel perfect collision, you can check out this link :
http://www.freeactionscript.com/2011/08/as3-pixel-perfect-collision-detection/
I'm not very good with radial calculations, I can't imagine thus I can't be sure. I need some explanation of Math.atan2() thing, please.
Usual task - to make an object rotate after the mouse. I get the differences, get the angle, I see angles in the text areas and DIRECTLY the object does follow the mouse. What I need now is everything to be smooth. I need angles to be 0-360 but after 180 object rotation becomes -180 and counts backwards, and mouse rotation becomes -90 after 270 and also counts back to 0.
More deeply, I want a smooth rotation, it means a set speed of say 2 per frame, to meet the mouse angle the shortest way. It takes to set conditions and I can't do that cause I don't even understand the logic of these values. They are almost random! I don't need it to be done or copied, I need to understand to move on so if you could please explain how does it work and what I do wrong...
Code is simple:
angle = Math.atan2(deltaY,deltaX)/(Math.PI/180) + 90; //+90 cause it lacks it to look at the mouse//
Object01.rotation = angle;
So the problem is I don't even get how it works... if 2 values are different the object can't point at the mouse but it does. Numbers lie and if I need something based on these numbers it will be wrong. Very wrong... Need organization. Meaning I want everything to be ready for further coding that will be based on the rotations to not jump up and down cause of misfit ends.
Add: Explanation of how does it happen, what I described above. Why such a chaos of the values? And an advice on how could I arrange it for further coding, just as I said. Animation alone wont work if I want to make rotation an element of important events such as shooting direction and aiming speed. Or changes of speed rotation of a lockpicked lock. Or anything much more complicated that wont work if I don't make straight and clear values: from A to Z, from 1 to 10, no 8s between 2 and 3, no R before B, no mouse angle 270 when object facing it -90 when they both started from 0 and reached 180 together.
Oh, and as I said, mouse facing works but when I try to make a certain speed of chasing mouse the shortest way it turns the object wrong directions in all 4 quarters. I assume it's also about this arctangens thing that has issues with delta values becoming negative in different quarters. And when I change it, some other value goes wrong... So I need to know exactly what I'm doing to know what's wrong and how to fix it. So yep. Need explanation. Please.
Add2: angleZ = Math.atan2(oppSide,adjSide)/(Math.PI/180);
So I divided rotation to 4 quarters, for each I count atan as opp. side to adj. side, then add 90, 180 and 270 respectively. My mouse rotation does 360, but the object that follow through simple object.rotation = angleZ; still goes to 180, then from -180 to 0 on the left side. Why does it ignore the simple command? The rotation fits but I need it to be equal, no surprises! Why is it happening? How can a number I directly set to be equal to another number as a base of the action change itself to the one of same rotation but completely different number? It doesn't even know it's degrees! It's as simple as "object.rotation, please be equal to the number I choose!"
It's just different coordinate systems. Like how x starts at 0 at the left of the stage, goes +x to the right, and -x to the left, object rotation starts at 0˚ pointing up, and goes +180˚ clockwise and -180˚ anti-clockwise.
Math.atan2 happens to start at 0 pointing left (-x), and go +270˚ clockwise and -90˚ anti-clockwise, which is annoying, but it just means you have to convert between coordinate systems by adding 90˚.
You can spin something around over and over of course, so the numbers jump so that they always stay within the same range, because 361˚ is the same as 1˚, and -270˚ is the same as 90˚. You can tell an object to rotate outside of the -180˚ to 180˚ range, and it will normalise the rotation to within those values.
As mitim described, to smoothly animate rotation you'll either need to use Event.ENTER_FRAME, a Timer, or a tweening library like TweenLite. Most tweening libraries can work out the shortest rotation direction for you, but otherwise you can simply calculate both and see which is smaller.
As an idea, since it seems like you know the angle you need to rotate towards and it's direction, would it be easier to just animate towards that angle to get your smooth rotation? Basically treat it like any other animatable property and just add on your rotation speed (2 degrees it looks like) per frame tick, until it reaches the desired rotation.
Find angle amount needed to rotate by
Figure out if clockwise or counter clockwise direction and set the rotation amount. This can be figured out by checking if the angle is great then 180 / positive or negative
Add the rotation amount * direction every frame tick, until the desired rotation is less then or equal to the rotation amount per frame
Set rotation to desired rotation