I have an 8x8 table matrix in JAVASCRIPT, for a text adventurer game and he has
ID: 3808570 • Letter: I
Question
I have an 8x8 table matrix in JAVASCRIPT, for a text adventurer game and he has an initial position. I am allowing the player to move left, right, up, down with buttons but here is my question: as he moves through the matrix, i want an "X" to move to the index as well so he can see where he is on the matrix(kind of like a marker), and if he bumps into any obstacles that i put in the array, for the prompt to tell him. please give simple functions, and if i have to put the function in the .click() function explain as well thanks! i am also using jquery.
Explanation / Answer
Tiling photos
• Tiled photos are cautiously crafted, perhaps via hand, so that they may be repeated without a visible seam.
• Oehlke's rock internals and mountains, for instance, are so repeated.
• Why: fill huge location with small texture, without stretching/distorting it
• also: avoid busting your GPU reminiscence and/or your reminiscence bus bandwidth.
• Will count greater on low-give up hardware, e.g. phones
For now, you do not want to be a tiling professional, however you have to understand what it's miles, and realize that you may learn how to cross do it (in PhotoShop or GIMP) if you needed to. There are excessive powered algorithms to tile an image robotically, however they supply mixed results. For a few packages they paintings well.
The fine general creation on tiling that I realize is Paul Bourke's
SpriteBatch draw()
public void draw(
Texture texture,
glide x, flow y,
float originX, go with the flow originY,
flow width, waft top,
flow scalex, float scaleY,
float rotation,
int srcX, int srcY,
int srcWidth, srcHeight,
boolean flipX, boolean flipY
);
Mountains
• Cheesey 2nd illusion of depth
• Draw the mountains 3 times, at distinctive offsets w/ one-of-a-kind shades
• transparent pixels don't draw at all
• Non-transparent pixels drawn with a modern solid coloration
• Tiled/repeated so a small texture can fill a huge location with out stretching out.
• "Layers" drawn again to front:
public void render (SpriteBatch batch)
// remote mountains (dark gray)
drawMountain(batch, zero.5f, 0.5f, 0.5f);
// remote mountains (grey)
drawMountain(batch, zero.25f, zero.25f, zero.7f);
// remote mountains (mild grey)
drawMountain(batch, zero.0f, zero.0f, 0.9f);
Clouds
• nearly a perfect instance of an combination item
• array of (inner) magnificence Cloud
• 3 cloud textures in assets for the illusion of range
• spawns at ordinary durations (no longer random)
• non-moving (for now; see later code in chapter 8)
• lovable iterator:
• public void render (SpriteBatch batch)
• for (Cloud cloud : clouds)
• cloud.render(batch);
•
Enums
the extent loader is answerable for interpreting the extent information (which changed into a huge picture) and rendering (the seen part of) it.
before searching at the extent loader:
• if you want to interpret pixels from the map, Oehlke makes use of a Java enum, one cost for each pixel colour/interpretation.
• In C/C++, enums are just a set of named integer constants
• In Java, enums are a category with N steady instances.
• If constructor takes params, enum's values ought to provide constants to bypass in to the ones params, and initialize corresponding fields
• Syntactic sugar for extending java.lang.Enum
• compared with a Singleton, enums define N-gletons. word even though that the Singleton layout pattern isn't so restricted concerning the constantness of its member variables
• you may use a switch to pick out among enum values
public enum BLOCK_TYPE
EMPTY(zero, 0, 0), // black
ROCK(zero, 255, 0), // inexperienced
PLAYER_SPAWNPOINT(255, 255, 255), // white
ITEM_FEATHER(255, 0, 255), // purple
ITEM_GOLD_COIN(255, 255, 0); // yellow
non-public int color;
private BLOCK_TYPE (int r, int g, int b)
colour g << sixteen b << 8 0xff;
public boolean sameColor (int shade)
return this.shade == color;
public int getColor ()
go back coloration;
magnificence degree
• The complete sport kingdom is a combination of static and dynamic
• static level statistics consists of decorations and static entities, e.g. barriers
• dynamic matters can be pre-specified in degree map, spawn at specific places and times, display up randomly, or be player controlled
• for Oehlke, magnificence level appears to include an mixture of all the static stuff.
• aim: examine level map and initialize this magnificence from it
• method: brute pressure
public class level
... enum...
// objects
public Array rocks;
// ornament
public Clouds clouds;
public Mountains mountains;
public WaterOverlay waterOverlay;
public degree (String filename)
init(filename);
non-public void init (String filename) ...
public void render (SpriteBatch batch) ...
method init()
private void init (String filename)
// items
rocks = new Array();
// load photograph report that represents the level statistics
Pixmap pixmap = new Pixmap(Gdx.files.internal(filename));
// experiment pixels from top-left to backside-right
int lastPixel = -1;
for (int pixelY = zero; pixelY < pixmap.getHeight(); pixelY++)
for (int pixelX = 0; pixelX < pixmap.getWidth(); pixelX++)
...
int currentPixel = pixmap.getPixel(pixelX, pixelY);
...
• after fetching the current pixel, an int,
• Oehlke uses a long chain of if-statements to do the right thing for each (color-coded) type of level content
• does not scale well, duh, should be using a switch somehow, if he can't figure out how to convert int into his enum type efficiently, he should not be using an enum at all
if (BLOCK_TYPE.EMPTY.sameColor(currentPixel))
// do nothing
else if (BLOCK_TYPE.ROCK.sameColor(currentPixel))
if (lastPixel != currentPixel)
obj = new Rock();
float heightIncreaseFactor = 0.25f;
offsetHeight = -2.5f;
obj.position.set(pixelX, baseHeight * obj.dimension.y
* heightIncreaseFactor + offsetHeight);
rocks.add((Rock)obj);
else
rocks.get(rocks.size - 1).increaseLength(1);
// player spawn point
else if (BLOCK_TYPE.PLAYER_SPAWNPOINT.sameColor(currentPixel))
...
// feather
else if (BLOCK_TYPE.ITEM_FEATHER.sameColor(currentPixel))
...
// gold coin
else if (BLOCK_TYPE.ITEM_GOLD_COIN.sameColor(currentPixel))
...
// unknown object/pixel color
else
int r = 0xff & (currentPixel >>> 24); //pink coloration channel
int g = 0xff & (currentPixel >>> 16); //inexperienced color channel
int b = 0xff & (currentPixel >>> 8); //blue color channel
int a = 0xff & currentPixel; //alpha channel
Gdx.app.blunders(TAG, "Unknown object at x<" + ... + ">");
lastPixel = currentPixel;
... create and initialize decorations, which aren't a part of the extent map
person Interface
• GUI is a gargantuan (and inefficient) factor of conventional desktop packages
• almost all video games will not use traditional GUI additives
• a number of video games' user interfaces are exceedingly primitive
So what is the consumer interface for a recreation?
• the ones parts of the display that tell the user a way to interact?
• something that is not a part.
• Oehlke uses two digicam items
• one for the motion and one for the GUI -- an interesting desire.
• The gadgets for the GUI are not digital international coordinates (meters)
• they're sized primarily based on what makes feel for the font: pixels
In WorldRenderer:
personal OrthographicCamera cameraGUI;
personal void init ()
batch = new SpriteBatch();
camera = new OrthographicCamera(Constants.VIEWPORT_WIDTH,
Constants.VIEWPORT_HEIGHT);
digital camera.role.set(0, 0, zero);
digicam.replace();
cameraGUI = new OrthographicCamera(Constants.VIEWPORT_GUI_WIDTH,
Constants.VIEWPORT_GUI_HEIGHT);
cameraGUI.role.set(zero, zero, zero);
cameraGUI.setToOrtho(proper); // turn y-axis
cameraGUI.update();
public void resize (int width, int height)
digital camera.viewportWidth = (Constants.VIEWPORT_HEIGHT
/ (drift)height) * (flow)width;
camera.update();
cameraGUI.viewportHeight = Constants.VIEWPORT_GUI_HEIGHT;
cameraGUI.viewportWidth = (Constants.VIEWPORT_GUI_HEIGHT
/ (float)peak) * (go with the flow)width;
cameraGUI.function.set(cameraGUI.viewportWidth / 2,
cameraGUI.viewportHeight / 2, zero);
cameraGUI.update();
The real display render() is then two calls to two render capabilities the usage of two cameras:
private void renderGui (SpriteBatch batch)
batch.setProjectionMatrix(cameraGUI.blended);
batch.start();
// draw collected gold cash icon + textual content
// (anchored to top left area)
renderGuiScore(batch);
// draw greater lives icon + textual content (anchored to top proper side)
renderGuiExtraLive(batch);
// draw FPS textual content (anchored to backside proper part)
renderGuiFpsCounter(batch);
batch.end();
public void render ()
renderWorld(batch);
renderGui(batch);
Rabin game layout
We did slides forty three-50 or so.
lecture 10
Nair/Oehlke chapter 6
• Actors
• simple recreation Physics
• Collision Detection
Actors
The term "Actor" is heavily overloaded in computer technological know-how; there was even a programming language called Actor. The time period, like "agent", suggests an entity that does things, i.e. one this is dynamic. on the simplest face of it, then, actors (as utilized in Nair/Oehlke) are mutable or moving objects inside a recreation.
In CanyonBunny, the actors are the bunny head, the feather, and the gold coin. The gold coin and the feather are like other decorations, besides with a bool value (if it has been collected, it does not render) and a point score presented upon collection.
Physics
• most(?) of recreation physics is about movement.
• every recreation object is prolonged with the subsequent fields, added to AbstractGameObject. (be aware: space wasted on non-cell objects via setting them right here.)
• devices are generally meters/2nd etc.
• they will get elevated by a (float deltaTime) to provide consistent with-body proportional changes.
• Vector2's used for unbiased x and y values
speed
pace, m/s
terminalVelocity
minima/maxima
friction
updateMotionX(deltaTime);
updateMotionY(deltaTime);
role.x += pace.x * deltaTime;
function.y += pace.y * deltaTime;
"updateMotion*" need to be referred to as "updateVelocity*". It manner to use friction and acceleration. Oehlke uses the subsequent set of rules:
1. if object is transferring, follow friction, which usually pulls closer to zero
2. practice acceleration
3. cap abs(pace) at +/- terminalVelocity
Is some thing incorrect with Oehlke's set of rules?
Updating movement
included void updateMotionX (flow deltaTime)
if (speed.x != zero)
// apply friction
if (speed.x > 0)
velocity.x =
Math.max(speed.x - friction.x * deltaTime, 0);
else
velocity.x =
Math.min(velocity.x + friction.x * deltaTime, zero);
// apply acceleration
speed.x += acceleration.x * deltaTime;
// make certain the item's velocity does not exceed the
// tremendous or bad terminal speed
velocity.x = MathUtils.clamp(pace.x,
-terminalVelocity.x, terminalVelocity.x);
GDX MathUtils
• faux elegance, in the main static strategies
• supplying faster, less accurate arithmetic for games.
• from time to time: use floats in place of doubles
• now and again: use desk research as opposed to (gradual) practise
• double clamp(x, min, max);
Bunny Head
It has if you want to pass, leap, fall, and fly. It doesn't need to violate OO ideas of encapsulation with a majority of these public variables, however it does it anyway.
public class BunnyHead extends AbstractGameObject
private very last waft JUMP_TIME_MAX = 0.3f;
personal final go with the flow JUMP_TIME_MIN = zero.1f;
non-public very last go with the flow JUMP_TIME_OFFSET_FLYING = JUMP_TIME_MAX - 0.018f;
public enum VIEW_DIRECTION LEFT, right;
public enum JUMP_STATE
GROUNDED, FALLING, JUMP_RISING, JUMP_FALLING
;
public VIEW_DIRECTION viewDirection;
public glide timeJumping;
public JUMP_STATE jumpState;
public boolean hasFeatherPowerup;
public drift timeLeftFeatherPowerup;
public BunnyHead() init();
public void init() ...
public void setJumping(boolean jumpKeyPressed) ...
public void setFeatherPowerup(boolean pickedUp) ...
public boolean hasFeatherPowerup() ...
The init() code in all fairness apparent constructors and physics initalization. not shown in magnificence, however test how enum constants are referenced (ENUMTYPE.ENUMVALUE) and the .set() APIs for points and Rectangles.
The jumping code tracks the bunny behavior thru a four-country finite automaton.
• you can't bounce in case you are off the ground, except you have got the function.
• also: you forestall rising as soon as you allow the jump key up.
public void setJumping (boolean jumpKeyPressed)
transfer (jumpState)
case GROUNDED: // individual is standing on a platform
if (jumpKeyPressed)
// start counting bounce time from the beginning
timeJumping = zero;
jumpState = JUMP_STATE.JUMP_RISING;
wreck;
case JUMP_RISING: // rising in the air
if (!jumpKeyPressed)
jumpState = JUMP_STATE.JUMP_FALLING;
ruin;
case FALLING:// Falling down
case JUMP_FALLING: // Falling down after jump
if (jumpKeyPressed && hasFeatherPowerup)
timeJumping = JUMP_TIME_OFFSET_FLYING;
jumpState = JUMP_STATE.JUMP_RISING;
damage;
The real paintings in update() is generally inherited, but the bunny overrides and provides:
• calculation of what path the 2d char is facing
• calculation of whilst the feather runs out
public void update (flow deltaTime)
exquisite.replace(deltaTime);
if (velocity.x != 0)
viewDirection = pace.x < 0 ? VIEW_DIRECTION.LEFT :
VIEW_DIRECTION.RIGHT;
if (timeLeftFeatherPowerup > 0)
timeLeftFeatherPowerup -= deltaTime;
if (timeLeftFeatherPowerup < zero)
// disable power-up
timeLeftFeatherPowerup = zero;
setFeatherPowerup(false);
The bunny's motion updater modifies default velocity updates using the contemporary jumping state.
included void updateMotionY (drift deltaTime)
switch (jumpState)
case GROUNDED:
jumpState = JUMP_STATE.FALLING;
wreck;
case JUMP_RISING:
// hold music of leap time
timeJumping += deltaTime;
// jump time left?
if (timeJumping <= JUMP_TIME_MAX)
// Still jumping
velocity.y = terminalVelocity.y;
break;
case FALLING:
break;
case JUMP_FALLING:
// Add delta times to track jump time
timeJumping += deltaTime;
// Jump to minimal height if jump key was pressed too short
if (timeJumping > 0 && timeJumping <= JUMP_TIME_MIN)
// still jumping
speed.y = terminalVelocity.y;
if (jumpState != JUMP_STATE.GROUNDED)
first-rate.updateMotionY(deltaTime);
Actors
The time period "Actor" is closely overloaded in computer technology; there has been even a programming language referred to as Actor. The term, like "agent", indicates an entity that does matters, i.e. one this is dynamic. on the most effective face of it, then, actors (as used in Nair/Oehlke) are mutable or transferring objects within a sport.
In CanyonBunny, the actors are the bunny head, the feather, and the gold coin. The gold coin and the feather are like different decorations, except with a bool cost (if it has been gathered, it does no longer render) and a factor score provided upon collection.
Physics
• maximum(?) of game physics is ready movement.
• every recreation item is extended with the following fields, added to AbstractGameObject. (note: area wasted on non-cell gadgets by way of putting them right here.)
• devices are normally meters/2nd etc.
• they'll get improved by way of a (waft deltaTime) to offer according to-body proportional modifications.
• Vector2's used for impartial x and y values
pace
velocity, m/s
terminalVelocity
minima/maxima
friction
poor pressure, essentially deceleration, carried out similarly to x and y, have to not be a Vector2 but it's miles
acceleration
m/s/s much like in excessive school physics
bounds
a "bounding box", kind Rectangle, for collision detection
public void update(glide deltaTime)
updateMotionX(deltaTime);
updateMotionY(deltaTime);
role.x += speed.x * deltaTime;
function.y += speed.y * deltaTime;
"updateMotion*" ought to be called "updateVelocity*". It means to apply friction and acceleration. Oehlke uses the subsequent set of rules:
1. if object is moving, practice friction, which constantly pulls toward zero
2. practice acceleration
3. cap abs(speed) at +/- terminalVelocity
Is something incorrect with Oehlke's set of rules?
Updating movement
protected void updateMotionX (go with the flow deltaTime)
if (pace.x != zero)
// observe friction
if (speed.x > zero)
speed.x =
Math.max(velocity.x - friction.x * deltaTime, 0);
else
speed.x =
Math.min(pace.x + friction.x * deltaTime, 0);
// observe acceleration
velocity.x += acceleration.x * deltaTime;
// make certain the object's velocity does not exceed the
// high-quality or poor terminal speed
velocity.x = MathUtils.clamp(velocity.x,
-terminalVelocity.x, terminalVelocity.x);
GDX MathUtils
• faux class, mostly static strategies
• presenting quicker, much less accurate arithmetic for video games.
• every now and then: use floats in place of doubles
• sometimes: use desk research instead of (slow) coaching
The render() for the bunny overrides to exchange the shade at the same time as powered up:
public void render (SpriteBatch batch)
TextureRegion reg = null;
// Set unique color when sport object has a feather energy-up
if (hasFeatherPowerup)
batch.setColor(1.0f, zero.8f, zero.0f, 1.0f);
// Draw photograph
reg = regHead;
batch.draw(reg.getTexture(), function.x, position.y, beginning.x,
origin.y, size.x, measurement.y, scale.x, scale.y, rotation,
reg.getRegionX(), reg.getRegionY(), reg.getRegionWidth(),
reg.getRegionHeight(), viewDirection == VIEW_DIRECTION.LEFT,
fake);
// Reset coloration to white
batch.setColor(1, 1, 1, 1);
finishing the level Loader
while we checked out elegance degree earlier than, it took an photograph report as enter, and the usage of a doubly-nested for-loop, it created (probably) an object at each pixel region. It become imagined to be a transfer, based on the shade in the photograph, but as a substitute it turned into a long chain of if-statements and calls to sameColor(pixel) to discern out what item is in that vicinity.
Now that we've got blanketed dynamic items (Actors?), we are able to end that level loader, which was in magnificence level's init() technique. there's a few dumb typecasting in right here; btw Java typecasting is a heavyweight runtime take a look at, not just a compiler handwave.
...
goldcoins = new Array();
feathers = new Array();
...
for (int pixelY = zero; pixelY < pixmap.getHeight(); pixelY++)
for (int pixelX = zero; pixelX < pixmap.getWidth(); pixelX++)
...
... if's for static entities such as Rocks
...
// player spawn factor
else if (BLOCK_TYPE.PLAYER_SPAWNPOINT.sameColor(currentPixel))
obj = new BunnyHead();
offsetHeight = -three.0f;
obj.position.set(pixelX,baseHeight * obj.measurement.y +
offsetHeight);
bunnyHead = (BunnyHead)obj;
// feather
else if(BLOCK_TYPE.ITEM_FEATHER.sameColor(currentPixel))
obj = new Feather();
offsetHeight = -1.5f;
obj.role.set(pixelX,baseHeight * obj.dimension.y
+ offsetHeight);
feathers.add((Feather)obj);
// gold coin
else if (BLOCK_TYPE.ITEM_GOLD_COIN.sameColor(currentPixel))
obj = new GoldCoin();
offsetHeight = -1.5f;
obj.position.set(pixelX,baseHeight * obj.measurement.y
+ offsetHeight);
goldcoins.upload((GoldCoin)obj);
The code for methods render() and update() simply show elegance stage to be a real mixture that calls render() and update() on all the stage's entities.
Collision Detection
• primary to maximum video games, whether or not they have actual "recreation physics" or not.
• now not just collisions in a physical experience
• not just detection: while one occurs, what to do about it?
• commonplace effects in video games:
o stop a move that might skip thru a stable wall
o causing a transferring item to "leap" off an immovable object
o motive harm (or praise?) due to some thing being "hit"
o reason a quest step to be marked finished
• danger: by the time you locate a collision, you may have already moved solids into an not possible overlap! Collision detection may also have to "go into reverse" a pass-in-progress, in particular if the overlap ought to ever be visible.
• suppose the bunny "hits" the rock. It can not cross there. So the move have to be undone and the bunny left where it's miles (and/or its direction of movement altered). If we do not bear in mind the bunny's old function because we already moved it, we are able to have hassle handling things right.
• hazard: if your gadgets pass too speedy, they could in no way check in as an overlap with an item! If pos + velocity*deltaTime moves you a long way enough, you could pop out on the alternative aspect of a rock, wall, etc. a way to restore?
In CanyonBunny, all this collision stuff happens in the WorldController magnificence.
• collision "occasion handlers" for each sort of collision between items
• an aggregate approach that checks for all collisions every frame
• name this combination approach once according to frame, from method replace()
• collision detection is a capability vicinity for overall performance troubles and the naive technique in CanyonBunny limits scalability.
• what is the impact of the damage; statements within the latter loops? workout: rewrite the loops with out them.
non-public void onCollisionBunnyHeadWithRock(Rock rock) ... ;
personal void onCollisionBunnyWithGoldCoin(GoldCoin goldcoin) ... ;
personal void onCollisionBunnyWithFeather(Feather feather) ... ;
personal void testCollisions ()
r1.set(degree.bunnyHead.function.x, degree.bunnyHead.role.y,
level.bunnyHead.bounds.width, degree.bunnyHead.bounds.peak);
// take a look at collision: Bunny Head <-> Rocks
for (Rock rock : stage.rocks)
r2.set(rock.role.x, rock.role.y, rock.bounds.width,
rock.bounds.height);
if (!r1.overlaps(r2)) hold;
onCollisionBunnyHeadWithRock(rock);
// essential: must do all collisions for valid
// part testing on rocks.
// take a look at collision: Bunny Head <-> Gold cash
for (GoldCoin goldcoin : level.goldcoins)
if (goldcoin.collected) preserve;
r2.set(goldcoin.position.x, goldcoin.function.y,
goldcoin.bounds.width, goldcoin.bounds.peak);
if (!r1.overlaps(r2)) keep;
onCollisionBunnyWithGoldCoin(goldcoin);
destroy;
// test collision: Bunny Head <-> Feathers
for (Feather feather : stage.feathers)
if (feather.accumulated) hold;
r2.set(feather.position.x, feather.position.y,
feather.bounds.width, feather.bounds.top);
if (!r1.overlaps(r2)) retain;
onCollisionBunnyWithFeather(feather);
break;
For the maximum element, that is initializing two rectangles with the current positions of the objects after which calling an overlaps() technique to come across a collision. unless the whole lot is transferring every body, maximum of the r2.set() calls may be prevented! Wasted redundancy like this kills scalability on your recreation.
What do you do whilst you detected a collision however you don't know where you were coming from? bet. assure the deltaTime is by no means large than a few max beneath which, your guesses may be accurate.
non-public void onCollisionBunnyHeadWithRock (Rock rock)
BunnyHead bunnyHead = level.bunnyHead;
waft heightDifference = Math.abs(bunnyHead.position.y
- ( rock.role.y + rock.bounds.top));
if (heightDifference > zero.25f)
boolean hitRightEdge = bunnyHead.position.x > (
rock.function.x + rock.bounds.width / 2.0f);
if (hitRightEdge)
bunnyHead.position.x = rock.position.x + rock.bounds.width;
else
bunnyHead.function.x = rock.role.x - bunnyHead.bounds.width;
return;
transfer (bunnyHead.jumpState)
case GROUNDED:
destroy;
case FALLING:
case JUMP_FALLING:
bunnyHead.role.y = rock.function.y +
bunnyHead.bounds.peak + bunnyHead.beginning.y;
bunnyHead.jumpState = JUMP_STATE.GROUNDED;
ruin;
case JUMP_RISING:
bunnyHead.role.y = rock.function.y +
bunnyHead.bounds.top + bunnyHead.origin.y;
ruin;
input Processing
name the following technique each body from the WorldController's update() method:
personal void handleInputGame (glide deltaTime)
if (cameraHelper.hasTarget(stage.bunnyHead))
// player movement
if (Gdx.enter.isKeyPressed(Keys.LEFT))
degree.bunnyHead.velocity.x =
-stage.bunnyHead.terminalVelocity.x;
else if (Gdx.enter.isKeyPressed(Keys.proper))
degree.bunnyHead.speed.x =
stage.bunnyHead.terminalVelocity.x;
else
// Execute auto-forward movement on non-computer platform
if (Gdx.app.getType() != ApplicationType.computer)
stage.bunnyHead.pace.x =
degree.bunnyHead.terminalVelocity.x;
// Bunny soar
if (Gdx.input.isTouched() input.isKeyPressed(Keys.area))
degree.bunnyHead.setJumping(proper);
else
degree.bunnyHead.setJumping(false);
dropping Lives, and finishing the game
public boolean isGameOver ()
return lives < zero;
public boolean isPlayerInWater ()
go back degree.bunnyHead.role.y < -five;
If the game is over, we need to print a message and stop processing long sufficient for the participant to digest their final results. A variable timeLeftGameOverDelay tracks how a great deal time we've got spent on it. WorldController's update() skips input managing so long as you are in a "game over" country, which car resets after a bit. different games might require a consumer action to reset.
public void update (float deltaTime)
if (isGameOver())
timeLeftGameOverDelay -= deltaTime;
if (timeLeftGameOverDelay < zero) init();
else
handleInputGame(deltaTime);
level.replace(deltaTime);
testCollisions();
cameraHelper.replace(deltaTime);
if (!isGameOver() && isPlayerInWater())
lives--;
if (isGameOver())
timeLeftGameOverDelay = Constants.TIME_DELAY_GAME_OVER;
else
initLevel();
Oehlke chapter 7
"Menus and alternatives" in some experience manner: polish, or: bells and whistles. there is an trouble of in which to keep persistent game possibilities. And, there may be a menu device.
a couple of displays
to be able to have a separate predominant menu screen, what are our options?
1. put into effect a class variable to indicate what screen we are on, and regulate render() to switch on that variable.
2. Subclass off of sport in preference to off of ApplicationListener, and put into effect the display interface on or extra screens. switch amongst them using recreation's setScreen() technique.
Oehlke makes use of #2 and for now we run with that; there may be suitable motives on a few platforms.
• The display interface calls for a category offer display() and disguise() techniques, in place of create() and dispose()
• This shows that the main motive of display screen is to make it cheap/speedy to exchange back and forth among unrelated pix, through not having to allocate/deallocate assets each time
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