I use GEOSwift library which has mapShape function. That function returns MKShape. That shape can be MKPolyline or MKPolygon. I want to draw that MKShape on mapview. How to do that ?
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I do not know how to set the position of a instance in gd script. The instanced shows up on the corner of the screen.
Thanks :)
It depends on what type of instance. If it's an object that has been derived from something like a Node2D, then position.x or position.y should do it. Do you have any code we can look at?
Depends on whether you want 2D or 3D.
A common method is as such:
Create the object you want to instance in its own scene.
Save the object as a scene (.tscn file) - for example "Scene1.tscn"
Call upon your instanced scene from your main scene as follows:
Make sure to preload the scene you plan to instance before your ready() function. For example if was called "Scene1", then declare :
onready var Scene1 = preload("res://Scene1.tscn")
Then, later in your code when you want to call an instance of the scene, do it as such:
var InstancedScene = Scene1.instance()
add_child(InstancedScene)
// This simply instances the scene (I think at co-ordinates (0,0,0)), but you can tell it where to instance it using the following example:
For 3D use:
InstancedScene.transform.origin = Vector3(50.0, 0.0, -50.0)
//Gives position x=50, y=0, x=-50.
This can also be used for rotation, just specify transform.basis and give a similar Vector3 coordinate set.
OR for 2D use:
InstancedScene.position = Vector2(100.0, 100.0)
//This instances the object 100 pixels across and 100 pixels down. Sub in whatever values you need. You can also specify a rotation using InstancedScene.rotation_degrees = 45 (To give 45 degrees for example)
I am trying to convert .svg file to 3d (.obj file) using javafx.
I can able to convert primitives like Shape - Cylinder, Box etc to Mesh. Is it possible to convert SVGPath to convert to any particular Mesh.
The open source library FXyz has exactly what you are looking for: a SVG3DMesh class that given a 2D SVGPath (or a string with its content) will return a 3D TriangleMesh, extruding the 2D shape to a certain height.
Later on you can export that mesh to a obj file.
This is a code snippet of how you can use it:
SVG3DMesh svg3DMesh = new SVG3DMesh("M40,60 C42,48 44,30 25,32", 10);
You can show the mesh:
svg3DMesh.setDrawMode(DrawMode.LINE);
svg3DMesh.setCullFace(CullFace.NONE);
or show a solid 3D object with the color you want:
svg3DMesh.setTextureModeNone(Color.RED);
For exporting the mesh to obj:
OBJWriter writer=new OBJWriter((TriangleMesh) ((TexturedMesh) svg3DMesh.getMeshFromLetter("")).getMesh(), "svg");
writer.setMaterialColor(Color.RED);
writer.exportMesh();
it will generate svg.obj and svg.mtl.
In Xamarin iOS, how can I simply move an image to the right 100px from its current location? I know that I am suppose to use Bounds, but I can't get the intenseness to really provide anything helpful. I have googled it and there isn't much that I can find.
Assuming you mean an UIImageView, you can use the Offset(dx,dy) method on its Frame property. If your UIImageView is called imageView:
var frame = imageView.Frame;
frame.Offset(100,0); // offset 100px horizontal, 0 px vertical
imageView.Frame = frame; // set the frame of the image to the new position.
Note that you must take the frame object into a seperate variable. That is, imageView.Frame.Offset(100,0) will not work.
I am a non-developer product manager for an application built in both Android and iOS. We have a bar graph in iOS that provides text for the content of the graph. It displays Totals for each bar, and percentages for each segment of each bar.
In Android, using AndroidPlot (so I understand) we just display the bars with different color segments and no percent totals or totals. I am told by the developer that we can't show more.
I would display the images here, but stackoverflow tells me I don't have enough reputation points to do this. I have created a link to my dropbox with the images https://www.dropbox.com/sh/2uocm5bn79rerbe/AAB7s9QEEYIRIgXhKbUAaOyDa
Is it possible to use AndroidPlot to emulate this iOS chart or at least represent to same information to the end user?
Your developer is more or less correct but you have options. Androidplot's BarRenderer by default provides only an optional label at the top of each bar, which in your iOS images is occupied by the "available", "new", "used" and "rent" label. That label appears to be unused in your Android screenshot so one option would be to utilize those labels do display your totals.
As far as exactly matching the iOS implementation with Androidplot, the missing piece is the ability to add additional labels horizontally and vertically along the side of each bar. You can extend BarRenderer to do this by overriding it's onRender(...) method. Here's a link for your developer that shows where in the code he'll want to modify onRender(...).
I'd suggest these modifications to add the vertical labels:
Invoke Canvas.save(Canvas.ALL_SAVE_FLAG) to store the default orientation of the Canvas.
Use Canvas.translate(leftX, bottom) to center on the bottom left point of the bar
Rotate the Canvas 90 degrees using Canvas.rotate(90) to enable vertical text drawing
Draw whatever text is needed along the side of the plot; 0,0 now corresponds to the bottom left corner of the bar so start there when invoking canvas.drawText(x,y).
Invoke Canvas.restore() to restore the canvas' original orientation.
After implementing the above, adding horizontal "%" labels should be self evident but if you run into trouble feel free to ask more questions along the way.
UPDATE:
Here's a very basic implementation of the above. First the drawVerticalText method:
/**
*
* #param canvas
* #param paint paint used to draw the text
* #param text the text to be drawn
* #param x x-coord of where the text should be drawn
* #param y y-coord of where the text should be drawn
*/
protected void drawVerticalText(Canvas canvas, Paint paint, String text, float x, float y) {
// record the state of the canvas before the draw:
canvas.save(Canvas.ALL_SAVE_FLAG);
// center the canvas on our drawing coords:
canvas.translate(x, y);
// rotate into the desired "vertical" orientation:
canvas.rotate(-90);
// draw the text; note that we are drawing at 0, 0 and *not* x, y.
canvas.drawText(text, 0, 0, paint);
// restore the canvas state:
canvas.restore();
}
All that's left is to invoke this method where necessary. In your case it should be done once per BarGroup and should maintain a consistent position on the y axis. I added the following code to the STACKED case in BarRenderer.onRender(...), immediately above the break:
// needed some paint to draw with so I'll just create it here for now:
Paint paint = new Paint();
paint.setColor(Color.WHITE);
paint.setTextSize(PixelUtils.spToPix(20));
drawVerticalText(
canvas,
paint,
"test",
barGroup.leftX,
basePositionY - PixelUtils.dpToPix(50)); // offset so the text doesnt intersect with the origin
Here's a screenshot of the result...sorry it's so huge:
Personally, I don't care for the fixed y-position of these vertical labels and would prefer them to float along the upper part of the bars. To accomplish this I modify my invocation of drawVerticalText(...) to look like this:
// needed some paint to draw with so I'll just create it here for now:
Paint paint = new Paint();
paint.setColor(Color.WHITE);
paint.setTextSize(PixelUtils.spToPix(20));
// right-justify the text so it doesnt extend beyond the top of the bar
paint.setTextAlign(Paint.Align.RIGHT);
drawVerticalText(
canvas,
paint,
"test",
barGroup.leftX,
bottom);
Which produces this result:
the problem I am having it that if inside the UIView Draw override, I change the view frame size, drawing a rectangle is not working as expected.
If I change the view frame size outside of the Draw override, it works fine. Is this an expected behavior or is it a problem with monotouch only?
This is the code I am using:
class ChildView : UIView
{
public override void Draw (RectangleF rect)
{
base.Draw (rect);
CGContext g = UIGraphics.GetCurrentContext();
//adding 30 points to view height
RectangleF rec = new RectangleF(this.Frame.Location,this.Frame.Size);
rec.Height+=30;
RectangleF rec_bounds = new RectangleF(0,0,rec.Width,rec.Height);
this.Frame=rec;
this.Bounds=rec_bounds;
//drawing a red rectangle to the first half of view height
UIColor.Red.SetFill();
RectangleF _rect = new RectangleF(this.Bounds.Location,this.Bounds.Size);
_rect.Height=_rect.Height/2;
g.FillRect(_rect);
}
}
However, the output of this code is this: (it should draw only 30 points red, but it draws 60 points)
Here is a link to download the project to reproduce this issue:
www.grbytes.com\downloads\RectangleDrawProblem.rar
Καλημέρα!
This behavior is expected. If you want to change the view's frame inside the Draw override, do it before getting the current context. That is because the graphics context also has a size and that is the size of the view at the time you are retrieving it.
Also, there is no need to set both the Bounds and the Frame of the view. You can just set either of them in this case.
By the way, I don't think you need to call base.Draw(). According to the Apple documentation, "If you subclass UIView directly, your implementation of this method does not need to call super."