Is it possible to animate objects so they move along a curved path, using green sock?
I would prefer to use greensock over jquery as I heard that greensock is much more efficient for animation.
Sure, there is BezierPlugin ( http://api.greensock.com/js/com/greensock/plugins/BezierPlugin.html )
You can use BezierPlugin
(http://api.greensock.com/js/com/greensock/plugins/BezierPlugin.html)
example :
var path = [{x:"+=200",y:"+=100"},
{x:"+=100",y:"+=300"},
{x:"+=0",y:"+=0"}
];
TimelineLite.to("#elem",5,{bezier:{autoRotate:true,curviness:2,values:path}});
https://codepen.io/tvalentius/pen/rezzrv
Related
In p5.play I want to set a sprite's opacity(like Fade). How can I do that?
sprite.opacity = 0.5 //something like that
There are two ways you can do this, depending on what you're trying to make transparent.
Changing the color
This method can only be used if you don't plan on adding images to your sprites. We can use this basic function:
sprite.shapeColor.setAlpha(50)
As I said, this method can only be used with colors.
Changing the images
It is by no means efficient, but it technically works
tint(255, 0-255);
drawSprites(sprite);
tint(255)
I have a chart with a legend whose symbol I replaced per the example in the docs. It looks like this:
var marker = chart.legend.markers.template;
marker.disposeChildren();
let dollar = marker.createChild(am4core.Image);
dollar.width = 40;
dollar.height = 40;
dollar.verticalCenter = "top";
dollar.horizontalCenter = "left";
dollar.strokeWidth = 2;
dollar.strokeOpacity = 1;
dollar.adapter.add("href", function (href: any, target: any) {
return `http://host.com?id=${target.dataItem.dataContext.dummyData.value`;
});
And this works, my images are displayed, little faces :) - I would like to add a border around the image of the same color of the series so that you can identify the marker in the legend with the series. But I can't find the right set of settings to make this a thing.
Is this possible?
EDIT -
So, I tried the following chage to the above and got a decent result. It's a bit hacky, so there might be a better way. If not, I guess this works.
//marker.disposeChildren(); <= don't do this
marker.width = "50px";
marker.height = "50px";
Basically the original marker remains and is behind the image. The marker has to be made larger so that it sticks out and creates a pseudo border.
I'm going to answer this one myself, since I have a working solution and no one lese answered :)
The edit above does what it is needed. Doesn't see like a great solution, a border around an image should be doable. But this gets us what we want.
Solution:
Make the marker bigger than the image
Place the image above the marker
In this case, we do not remove child elements of the marker, like the sample code on amchart4 shows, since you need it.
My CAMetalLayer background color is black, even if i'm assigning new color as the backgroundColor property.
Am i missing something? Thanks!
Link to the original project :
https://github.com/audiokit/MetalParticles
This project takes a rather unconventional approach to clearing the drawable's texture each frame: it replaces the textures contents with an array of zeros that is the same size as the texture (width * height * 4). Subsequently, it encodes some compute work that actually draws the particles. This is almost certainly not the most efficient way to achieve this effect, but if you want to make the smallest change that could possibly work (as opposed to experimenting with making the code as efficient as possible), Just fill the blankBitmapRawData array with your desired clear color (near line 82 of ParticleLab.swift).
I have gone through your code and can not see a place where you are setting background Color.
The metal layer is added as a sublayer to it, so you have to set it explicitly.
Add this line at the end of your init method in ParticialLab class and see if it works.
self.backgroundColor = UIColor.redColor().CGColor
I found that self.isOpaque = false was needed on the layer.
I have a circle-shaped dynamic body and I need to resize it during the game (It appears like a point, then it grows to a circle and after that it starts moving). How should I do that?
I have an idea - it's to use some animation (Circle has the same radius, but due to animation it looks like the circle grows), but I'm not sure if it's right way or not. (Besides I don't know how to realize it)
For scaling circle, if you are using sprite just scale it sprite.setScale(float), if your sprite is attached to Box2d Circle-shape then get the Body's shape and set the radius
Shape shape = body.getFixture().getShape;
shape.setRadius(radiusValue);
and if you are using ShapeRenderer just multiply the points of ShapeRenderer.
I assume that you are talking about a Box2D body.
It is not possible to change a circle-shaped fixture with Box2D. Box2D is a rigid body simulator. What you would have to do is destroy the fixture and replace it with a smaller/bigger version of the circle. But this will cause a lot of problems, since you cannot destroy a fixture when there is still a contact for example.
It would be better to keep the circle the same size and just simulate a change in size with an animation of a texture on top.
If you cannot simulate that, then maybe try the following approach: Have several versions of that circle in different sizes and keep them on top of each other. Implement a ContactFilter which will only cause contacts for the one circle which is currently "active".
Inside any Object class with box2d, I use the following for dynamic resizing:
public void resize(float newradius) {
this.body.destroyFixture(this.fixture);
fixtureDef.density = (float) (this.mass/(Math.PI*newradius*newradius));
this.radius = newradius;
CircleShape circle = new CircleShape();
circle.setRadius(newradius);
this.fixtureDef.shape = circle;
circle.dispose();
this.fixture = body.createFixture(fixtureDef);
this.fixture.setUserData(this);
}
You can also see the following topic: How to change size after it has been created
I'm trying to get my head around using QuartzCore to render semi-complex text/gradient/image UITableViewCell composites. Thankfully, Opacity will let me visually build the view and then spit out source code to drop in to cocoa touch. Trouble is, Opacity assumes the code is running on iOS 4, which is a problem if you want to draw Quartz views on an iPad.
For me, the offending method is CGPathGetPathBoundingBox ... would someone mind pointing me to a suitable alternative or workaround to this (presumably simple) method?
If you care to have some context (no pun intended), here you go:
transform = CGAffineTransformMakeRotation(1.571f);
tempPath = CGPathCreateMutable();
CGPathAddPath(tempPath, &transform, path);
pathBounds = CGPathGetPathBoundingBox(tempPath);
point = pathBounds.origin;
point2 = CGPointMake(CGRectGetMaxX(pathBounds), CGRectGetMinY(pathBounds));
transform = CGAffineTransformInvert(transform);
The alternative is to iterate on the points of the path and note down the leftmost, rightmost, upmost, and downmost co-ordinates of the anchor points yourself, then work out origin and size from those numbers.
You should wrap this in a function, and name it something like MyPathGetPathBoundingBox, and use that until you drop support for iOS 3.x. That will make it easy to switch to CGPathGetPathBoundingBox once you can.