Right now, I am trying to use impulses/forces to make my character jump. I was using gravity so it looks like they are jumping, but the sizes of the jumps were different overtime. Here is my code for attempting to make the character jump, but when I do it, it does not work.
Here is the jumping code I have right now:
func Bigpersonjump () {
BigPerson.physicsBody?.velocity = CGVectorMake(0.0, 0.0)
BigPerson.physicsBody?.applyImpulse(CGVectorMake(0.0, 10.0))
println("Detected")
}
Here is the code for spawning the character:
self.BigPerson = SKSpriteNode(imageNamed: "1")
//self.BigPerson = SKSpriteNode(texture: BigPersonTexture)
self.BigPerson.size.height = self.size.height / 8
self.BigPerson.size.width = self.size.width / 13
self.BigPerson.position = CGPointMake(CGRectGetMidX(self.frame) / 2 , self.frame.size.height / 2.2)
self.BigPerson.zPosition = 9
BigPerson.physicsBody = SKPhysicsBody(rectangleOfSize: BigPerson.size)
BigPerson.physicsBody?.usesPreciseCollisionDetection = true
BigPerson.physicsBody?.dynamic = false
BigPerson.physicsBody?.categoryBitMask = BodyType.BigPersonCategory.rawValue
BigPerson.physicsBody?.allowsRotation = false
BigPerson.physicsBody?.collisionBitMask = BodyType.ScoreCategory.rawValue
BigPerson.physicsBody?.contactTestBitMask = BodyType.ScoreCategory.rawValue
var distanceToMove = CGFloat(self.frame.size.width + 2.0 * BigPerson.size.width)
var moveBigPerson = SKAction.moveByX(distanceToMove * 5.3, y: 0.0, duration: NSTimeInterval (0.02 * distanceToMove))
BigPerson.runAction(moveBigPerson)
BigPerson.runAction(LeftSideRunning)
self.addChild(self.BigPerson)
For realistic jump you need to use only applyImpulse, not SKActions (e.g. on user's tap).
Physics body should be dynamic (in your code it is false).
Check different values for impulse value, because you body may be too heavy.
Also please check friction value for both body and surface (as I see in your code you are trying to move it horizontally).
Also try different directions, may be you are trying to jump in the wrong direction.
Related
I have a script in my simple platformer game which says that if my player is in the ground and "Z" is pressed, his movement in the Y axis is going to go up to 600, and if he's not in the ground, he's going to perform the jump animation.
So here's the thing, I know it plays only the first frame of the jumping animation because the code is constantly detecting that the player is in the air. I want a way to tell the code to trigger the animation only once.
I tried using a function called input_(event): but it seems that it doesn't have a is_action_just_pressed type of Input, just is_action_pressed.
I'm fairly new to Godot and don't know how to use signals. Signals might help via animation_finished(), although that function might have nothing to do with what I actually want to do in my code.
Here's my code:
extends KinematicBody2D
#Variables van aquí
var movimiento = Vector2();
var gravedad = 20;
var arriba = Vector2(0, -1);
var velocidadMax = 600;
var fuerza_salto = -600;
var aceleracion = 5;
var saltando = false;
func _ready(): # Esto es void Start()
pass;
func _physics_process(delta): #Esto es void Update()
movimiento.y += gravedad;
if Input.is_action_pressed("ui_right"):
$SonicSprite.flip_h = true;
$SonicSprite.play("Walk");
movimiento.x = min(movimiento.x +aceleracion, velocidadMax);
elif Input.is_action_pressed("ui_left"):
$SonicSprite.flip_h = false;
$SonicSprite.play("Walk");
movimiento.x = max(movimiento.x-aceleracion, -velocidadMax);
else:
movimiento.x = lerp(movimiento.x, 0, 0.09);
$SonicSprite.play("Idle");
if is_on_floor():
if Input.is_action_just_pressed("z"):
movimiento.y = fuerza_salto;
else:
$SonicSprite.play("Jump");
movimiento = move_and_slide(movimiento, arriba)
I had the smae problem, and it was solved for me adding the next after move_and_slide():
if velocity.y == 0:
velocity.y = 10
Apparently, if velocity is 0 after move_and_slide() it does not detect is_on_floor() anymore (bug?) so i added small velocity in direction of gravity.
About usinginput_(event), you do not need just_pressed because it only process when there is an input.. you can do somethin like this:
func _input(event):
if event.is_action_pressed("ui_up") and is_on_floor():
velocity.y = jump_speed
What i called velocity, i think in your script is called movimiento. Also, i think you are mixing gravities and velocities in movimiento. I'm sharing you my character scrpit so you can compare and see if it works better:
extends KinematicBody2D
var Bullet = preload("res://Bullet.tscn")
var speed = 200
var jump_speed = -300
var shot_speed = 100
var velocity = Vector2()
var grav = 980
var shooting = false
func _ready():
$AnimatedSprite.play()
$AnimatedSprite.connect("animation_finished",self,"on_animation_finished")
func _input(event):
if event.is_action_pressed("ui_up") and is_on_floor():
velocity.y = jump_speed
if event.is_action_pressed("shoot") and !shooting:
shooting = true
shot_speed = 20
velocity.y = -200
fire_weapon()
func _physics_process(delta):
velocity.x = 0
if Input.is_action_pressed("ui_right"):
velocity.x += speed
if Input.is_action_pressed("ui_left"):
velocity.x -= speed
if velocity.length() > 0:
if velocity.x < 0:
$AnimatedSprite.flip_v = true
$AnimatedSprite.rotation_degrees = 180
elif velocity.x > 0:
$AnimatedSprite.flip_v = false
$AnimatedSprite.rotation_degrees = 0
if shooting:
$AnimatedSprite.animation = "shot"
velocity.x = -shot_speed * cos($AnimatedSprite.rotation_degrees)
shot_speed *= 0.98
else:
if is_on_floor():
if velocity.x == 0:
$AnimatedSprite.animation = "idle"
else:
$AnimatedSprite.animation = "moving"
else:
$AnimatedSprite.animation = "jumping"
velocity.y += grav * delta
velocity = move_and_slide(velocity, Vector2(0,-1))
if velocity.y == 0:
velocity.y = 10
func on_animation_finished():
if $AnimatedSprite.animation == "shot":
shooting = false
func fire_weapon():
var bullet = Bullet.instance()
get_parent().add_child(bullet)
if $AnimatedSprite.flip_v :
bullet.position = $ShotLeft.global_position
else:
bullet.position = $ShotRight.global_position
bullet.rotation_degrees = $AnimatedSprite.rotation_degrees
bullet.linear_velocity = Vector2(1500 * cos(bullet.rotation),1500*sin(bullet.rotation))
Notice that i do not use gravity as a velocity or moviemiento; instead y multiply it by delta for getting velocity, as acceleration x time gives velocity.
I hope this helps.
This kind of problem can be solved using a Finite State Machine to manage your character controls and behaviour. You would play the Jump animation on entering the Jumping state from the Walking state. Utilizing correct design patterns early prevents spaghetti code in the future.
This is not a Godot specific solution, but definitely one worth your attention.
Let's dissect what's happening here, you fire up the code and ask your player to play the animation in one frame and then again in the other and in the next as long as the correct key is pressed or you in the correct state.
What the problem, the problem is that at every call of the function play it fires the animation again and again so it just restarts or another call runs separately and this causes unexpected behaviour.
The better way will be to manage the state of the player and animation player simultaneously and using that to perform animation calls.
enum State { IDLE, WALK, RUN, JUMP, INAIR, GROUNDED } ## This is to manage the player state
var my_state = State.IDLE ## Start the player with the idle state
As for the animation player state use the signal that you were talking about using the GUI or with code like below.
get_node("Animation Player").connect("animation_finished", this, "method_name")
## Here I assume that you have the Animation Player as the Child of the Node you the script on
And also hold a boolean variable to tell if the animation is playing or not.
if ( animation_not_playing and (case)):
animation_player.play("animation")
Turn it true or false as per your liking. Based on the animation finished signal.
In future, you might want to consider even using a simple FSM to maintain all this state data and variables.
I am working on a drawing application in HTML5 canvas, using Easeljs. So far I am able to drag and drop objects into the field, but I only want them within certain bounds.
To illustrate:
Objects 1, 2, 4 and 5 should get deleted, but object 3 should be kept.
I have tried using hitTest(), but that didn't work properly (I probably did something wrong). I would love to post the code I used, but my PC froze while working on it... Thought I'd better ask while unfreezing, haha.
Here is a quick drag and drop sample with bounds constraining:
http://jsfiddle.net/xrqatyLs/8/
The secret sauce is just in constraining the drag position to your own values.
clip.x = Math.max(bounds.x, Math.min(bounds.x + bounds.width - clipWidth, evt.stageX));
clip.y = Math.max(bounds.y, Math.min(bounds.y + bounds.height-clipHeight, evt.stageY));
Here is another more complex example that manually checks if one rectangle intersects another rectangle:
http://jsfiddle.net/lannymcnie/yvfLwdzn/
Hope that helps!
Solution:
var obj1 = obj.getBounds().clone(); // obj = a pylon
var e = obj1.getTransformedBounds();
var obj2 = bg.getBounds().clone(); // bg = the big green field
var f = obj2.getTransformedBounds();
if(e.x < f.x || e.x + e.width > f.x + f.width) return false;
if(e.y < f.y || e.y + e.height > f.y + f.height) return false;
return true;
After all it's so simple, but I guess I was working on it for so long that I started to think too hard...
I am making a game where there are clouds moving, and I want it so the clouds will fade away when the character lands on it. However, when I put the code, it fades away if the character goes around it and hits the bottom or the side of the cloud while it is still falling. Here is the code I have for detecting when the character and cloud have hit.
Is there anyway to determine when the character has landed on top of the cloud so it does not fade the cloud away if it hits it from the bottom or side while it is falling?
Here is code for declaring the objects:
Person.physicsBody?.usesPreciseCollisionDetection = true
Person.size = CGSizeMake(self.frame.size.width / 25, self.frame.size.height / 16.25)
Person.physicsBody = SKPhysicsBody(rectangleOfSize: Person.size)
Person.physicsBody?.restitution = 0
Person.physicsBody?.friction = 0
Person.physicsBody?.allowsRotation = false
Person.physicsBody?.affectedByGravity = true
Person.physicsBody?.dynamic = true
Person.physicsBody?.linearDamping = 0
Person.zPosition = 5
Person.physicsBody?.categoryBitMask = BodyType.PersonCategory.rawValue
Person.physicsBody?.contactTestBitMask = BodyType.CloudCategory.rawValue
Person.position = CGPoint(x: CGRectGetMidX(self.frame), y: CGRectGetMidY(self.frame) * 1.7)
self.addChild(Person)
Cloud = SKSpriteNode(texture: NormalCloudTexture)
Cloud.zPosition = 7
Cloud.physicsBody?.usesPreciseCollisionDetection = true
Cloud.physicsBody?.affectedByGravity = false
Cloud.physicsBody?.allowsRotation = false
Cloud.size = CGSizeMake(self.frame.size.width / 8.05, self.frame.size.height / 40)
Cloud.physicsBody = SKPhysicsBody(rectangleOfSize: Cloud.size)
Cloud.physicsBody?.friction = 0
Cloud.physicsBody?.restitution = 0
Cloud.physicsBody?.dynamic = false
Cloud.position = CGPointMake(CGRectGetMidX(self.frame), CGRectGetMidY(self.frame) / 7.60)
addChild(Cloud)
Here is code for when the objects have hit:
func didBeginContact(contact: SKPhysicsContact)
{
let contactMask = contact.bodyA.categoryBitMask | contact.bodyB.categoryBitMask
switch(contactMask)
{
case BodyType.PersonCategory.rawValue | BodyType.CloudCategory.rawValue:
JumpContact = true
let CheckDelay = delay(0.055)
{
//cloud fades away here
}
I have not done it, but i have an idea. :)
I think you should do:
Track contact position with contactPoint property and then check if it is not touching x position of the cloud lower then few points from the top.
I hope it helps you. :)
Thank you for your recommendation! I decided to fool around, here is what you do guys!
//put like a few millisecond delay here, forgot it
if (Person.physicsBody?.velocity.dy == 0){//this means the person has stopped moving since it landed
//cloud fades away
}
I have these two images that are the same image and I want them to repeat so it looks like the background is moving. I have this code but only one of the background images goes through then it goes back to the grey screen. The other background image doesn't follow the first one. How do I fix that? Thanks! (This is in swift xcode)
func spawnBackground() {
let cloud = SKSpriteNode(imageNamed: "CloudBg")
let cloud2 = SKSpriteNode(imageNamed: "CloudBg2")
cloud.position = CGPointMake(frame.size.width + cloud.frame.size.width / 2,cloud.frame.height / 2)
cloud.setScale(1.35)
cloud.zPosition = -15
cloud2.position = CGPointMake(self.size.width/2, self.size.height/2)
cloud2.setScale(1.35)
cloud.zPosition = -15
let moveTop = SKAction.moveByX(0, y: cloud.size.height, duration: NSTimeInterval(CGFloat(gameSpeed) * cloud.size.height))
cloud.runAction(SKAction.repeatActionForever(moveTop))
cloud2.runAction(SKAction.repeatActionForever(moveTop))
addChild(cloud)
addChild(cloud2)
}
I think you are looking for an action sequence like this:
let cloud = SKSpriteNode(imageNamed: "CloudBg")
let cloud2 = SKSpriteNode(imageNamed: "CloudBg2")
cloud.position = CGPointMake(frame.size.width + cloud.frame.size.width / 2,cloud.frame.height / 2)
cloud.setScale(1.35)
cloud.zPosition = -15
cloud2.position = CGPointMake(self.size.width/2, self.size.height/2)
cloud2.setScale(1.35)
cloud.zPosition = -15
var actionone = SKAction.moveToX(0, y: cloud.size.height, duration: NSTimeInterval(CGFloat(gameSpeed) * cloud.size.height))
var actiontwo = SKAction.runBlock({
cloud.position = CGPointMake(frame.size.width + cloud.frame.size.width / 2,cloud.frame.height / 2)
})
cloud.runAction(SKAction.repeatForever(SKAction.sequence([actionone,actiontwo])))
Of course you will have to edit this code to work where when one cloud reaches a certain point the other one begins, but that is the general idea.
I'm trying to use
NSBitmapImageRep.bitmapImageRepByConvertingToColorSpace(NSColorSpace.genericRGBColorSpace(), renderingIntent: NSColorRenderingIntent.Perceptual);
to convert an NSImage to a format that can be handled by openGL, and it works (unlike bitmapImageRepByRetaggingWithColorSpace()), but I get an error:
<Error>: The function ‘CGContextClear’ is obsolete and will be removed in an upcoming update. Unfortunately, this application, or a library it uses, is using this obsolete function, and is thereby contributing to an overall degradation of system performance.
which is sort of useless, because it's Apple's own code, and I can't seem to find an alternative to bitmapImageRepByConvertingToColorSpace(), or any note that it too is deprecated.
EDIT:
var image=NSImage(size: frame);
image.lockFocus();
//println("NSImage: \(image.representations)");
string.drawAtPoint(NSMakePoint(0.0,0.0), withAttributes: attribs);
var bitmap2=NSBitmapImageRep(focusedViewRect: NSMakeRect(0.0,0.0,frame.width,frame.height))?;
image.unlockFocus();
bitmap=bitmap2!.bitmapImageRepByConvertingToColorSpace(NSColorSpace.genericRGBColorSpace(), renderingIntent: NSColorRenderingIntent.Perceptual);
For some reason this question interested me. It looks like the solution is to lock focus on your NSImage, then use NSBitmapImageRep(focusedViewRect:) to create the NSBitmapImageRep.
I tried to recreate your situation (as I understand it) and then create an NSBitmapImageRep with the following code:
var img:NSImage = NSImage(size: NSMakeSize(200,200))
img.lockFocus()
let testString:NSString = "test String"
testString.drawAtPoint(NSMakePoint(10,10), withAttributes: nil)
img.unlockFocus()
println("img Description = \(img.description)")
I got the following description:
img Description = NSImage 0x608000067ac0 Size={200, 200} Reps=(
"NSCGImageSnapshotRep:0x61000007cf40 cgImage=CGImage 0x6100001a2bc0")
I then extended this code to:
var img:NSImage = NSImage(size: NSMakeSize(200,200))
img.lockFocus()
let testString:NSString = "test String"
testString.drawAtPoint(NSMakePoint(10,10), withAttributes: nil)
img.unlockFocus()
println("img Description = \(img.description)")
img.lockFocus()
var bitmapRep:NSBitmapImageRep = NSBitmapImageRep(focusedViewRect: NSMakeRect(0.0, 0.0, img.size.width, img.size.height))!
img.unlockFocus()
println("bitmap data planes = \(bitmapRep.bitmapData)")
println("bitmap pixels wide = \(bitmapRep.size.width)")
println("bitmap pixels high = \(bitmapRep.size.height)")
println("bits per sample = \(bitmapRep.bitsPerSample)")
println("samples per pixel = \(bitmapRep.samplesPerPixel)")
println("has alpha = \(bitmapRep.alpha)")
println("is planar = \(bitmapRep.planar)")
println("color space name = \(bitmapRep.colorSpace)")
println("bitmap format = \(bitmapRep.bitmapFormat)")
println("bytes per row = \(bitmapRep.bytesPerRow)")
println("bits per pixel = \(bitmapRep.bitsPerPixel)")
The output for the NSBitmapImageRep parameters was:
bitmap data planes = 0x000000010b6ff100
bitmap pixels wide = 200.0
bitmap pixels high = 200.0
bits per sample = 8
samples per pixel = 4
has alpha = true
is planar = false
color space name = Color LCD colorspace
bitmap format = C.NSBitmapFormat
bytes per row = 800
bits per pixel = 32
I've posted some new code below. I've created two NSBitMapImageRep just like your code (except that I used the method bitmapImageRepByRetaggingWithColorSpace), and I exported both of them to a PNG file. I got the same image in both PNG files.
But I'm wondering a couple of things. First, the difference in your two tests was not only the OS X version, but the hardware produced different color spaces. You should check to be sure bitmap2 is not nil.
Second, I'm wondering if OpenGL cares. If bitmap2 is not nil and you pass OpenGL bitmap2.bitmapData, does it work?
My new code (deleting most of the println):
var img:NSImage = NSImage(size: NSMakeSize(200,200))
img.lockFocus()
let testString:NSString = "test String"
let font:NSFont = NSFont(name: "AppleCasual", size: 18.0)!
let textStyle = NSMutableParagraphStyle.defaultParagraphStyle().mutableCopy() as NSMutableParagraphStyle
textStyle.alignment = NSTextAlignment.LeftTextAlignment
let textColor:NSColor = NSColor(calibratedRed: 1.0, green: 0.0, blue: 1.0, alpha: 1.0)
let attribs:NSDictionary = [NSFontAttributeName: font,
NSForegroundColorAttributeName: textColor,
NSParagraphStyleAttributeName: textStyle]
testString.drawAtPoint(NSMakePoint(0.0, 0.0), withAttributes: attribs)
img.unlockFocus()
println("img Description = \(img.description)")
img.lockFocus()
var bitmapRep:NSBitmapImageRep = NSBitmapImageRep(focusedViewRect: NSMakeRect(0.0, 0.0, img.size.width, img.size.height))!
img.unlockFocus()
let pngPath:String = "TestStringBeforeChange.png"
let imageProps = [NSImageCompressionFactor: NSNumber(float: 1.0)]
let outputImageData = bitmapRep.representationUsingType(NSBitmapImageFileType.NSPNGFileType, properties: imageProps)
let fileSavePanel = NSSavePanel()
fileSavePanel.nameFieldStringValue = pngPath
var savePanelReturn = fileSavePanel.runModal()
if savePanelReturn == NSFileHandlingPanelOKButton
{
var theFileURL = fileSavePanel.URL
var saveStatus = outputImageData?.writeToURL(theFileURL!, atomically: true)
}
let bitmapRep2 = bitmapRep.bitmapImageRepByRetaggingWithColorSpace(NSColorSpace.genericRGBColorSpace())
let pngPath2:String = "TestStringAfterChange.png"
let outputImageData2 = bitmapRep2!.representationUsingType(NSBitmapImageFileType.NSPNGFileType, properties: imageProps)
let fileSavePanel2 = NSSavePanel()
fileSavePanel2.nameFieldStringValue = pngPath2
var savePanel2Return = fileSavePanel2.runModal()
if savePanel2Return == NSFileHandlingPanelOKButton
{
var theFileURL2 = fileSavePanel2.URL
var saveStatus2 = outputImageData2?.writeToURL(theFileURL2!, atomically: true)
}
Sorry for all the posts, but I don't want to let this go, and it's interesting.
I created 3 PNG files: the first using the original NSBitmapImageRep, a second using an NSBitmapImageRep created with bitmapImageRepByRetaggingWithColorSpace and a third using an NSBitmapImageRep created with bitmapImageRepByConvertingToColorSpace (I, of course, got the system warning when I used this function).
Looking at these three PNG files in Preview's Inspector, they were all RGB color models; only the colorSynch profile for the first file was different from that of the second and third file. So I thought maybe there's no difference in the bitmapData among these files.
I then wrote some code to compare the bitmapData:
var firstRepPointer:UnsafeMutablePointer<UInt8> = bitmapRep.bitmapData
var secondRepPointer:UnsafeMutablePointer<UInt8> = bitmapRep2!.bitmapData
var firstByte:UInt8 = 0
var secondByte:UInt8 = 0
for var i:Int = 0; i < 200; i++
{
for var j:Int = 0; j < 200; j++
{
for var k:Int = 0; k < 4; k++
{
memcpy(&firstByte, firstRepPointer, 1)
firstRepPointer += 1
memcpy(&secondByte, secondRepPointer, 1)
secondRepPointer += 1
if firstByte != secondByte {println("firstByte = \(firstByte) secondByte = \(secondByte)")}
}
}
}
As I expected, there were no differences when I compared the bitmapData from the original bitmap rep to the bitmapData from the bitmap rep created with bitmapImageRepByRetaggingWithColorSpace.
It got more interesting, however when I compared the bitmapData from the original bitmap rep to the data from the bitmap rep created with bitmapImageRepByConvertingToColorSpace.
There were lots of differences in the data. Small differences, but lots of them.
Even though there were no differences I could see in the PNG files, the underlying data had been changed by bitmapImageRepByConvertingToColorSpace.
All that said, I think you should be able to pass .bitmapData from any of these bitmap reps to an OpenGL texture. The data from the bitmap rep created with bitmapImageRepByConvertingToColorSpace might create a texture that looks different, but it should be valid data.