Drawing | Drawing and fill color | Canvas library

Sounds like you use a perspective projection, and the formula you use in steps 1 and 2 won't work because VP * vec4 will in the general case result in a vec4(x,y,z,w) with the w value != 1, and adding a vec4(a,b,0,0) to that will just get you vec3( (x+a)/w, (y+b)/w, z) after the perspective divide, while you seem to want vec3(x/w + a, y/w +b, z). So the correct approach is to scale a and b by w and add that before the divde: vec4(x+a*w, y+b*w, z, w).

Note that when you move your camera closer to the geometry, the effective w value will approach towards zero, so (x+a)/w will be a greater than x/w + a, resulting in your geometry getting bigger.

The syntax you want comes from:

https://www.powershellstation.com/2016/04/29/introducing-visiobot3000-part-2-superman/

So the syntax for the line of code to drop a shape on a page is:

You missed to set the alignment. By default OpenGL assumes that the start of each row of the raster is aligned to 4 bytes. This is because the GL_UNPACK_ALIGNMENT parameter by default is 4. Each row in the raster has 5 bytes (40 / 8 = 5). Therefore you need to change the alignment to 1:

You've already added canvas to the pane, try to apply .setScaleX/Y before pane.getChildren().add(canvas).

Yes you can imitate the behavior of a group of RadioButton controls in a container. Just find the controls of the same type in the Parent.Controls collection and uncheck them when the current instance is checked.

Example

Add this method to MyToggleButton class.

The mask simply isn't big enough to cover the shape. You've not set any height/width for it so you'll get the defaults of 120%. That's not enough in this case for the width.

Increasing the viewBox width corrects things as the mask width is a percentage of that viewBox width so you're indirectly increasing the mask width.

It's strange that no one could answer this question. So I finally figured out how to make it by myself.

The solution is in the following link.

The primary reason was that mapbox plots things not based on its vector configuration. It renders things through its matrix as follows.

var m = new THREE.Matrix4().fromArray(matrix); var l = new THREE.Matrix4().makeTranslation(modelTransform.translateX, modelTransform.translateY, modelTransform.translateZ) .scale(new THREE.Vector3(modelTransform.scale, -modelTransform.scale, modelTransform.scale))

The problem is - the code is rendering the complete path - start-to-end each time and start is same for all animations.

The idea for loaders is - start point has to change after each animation - something like -

1. Start at angle 0
2. Go up to angle 45 /// or 60 whatever you want this to be
3. Change start angle to next logical step - say 30
4. Then render up to 75 /// or 90 depending on what you chose previously

In this arrangement, you have to keep drawing a certain portion of the shape by changing start point continuously.

In practice, achieving a smooth transition between different start point values may prove out to be difficult than it seems. You can find an example here - https://github.com/SVProgressHUD/SVProgressHUD/blob/master/SVProgressHUD/SVIndefiniteAnimatedView.m#L48-L102

UPDATE

The link I shared above has all the hints in it. This library uses an image as a mask and then rotate that continuously. Mask shape can be anything you like - you already have code for that.

You just need to create an image that's appropriate for your animation. See what their asset looks like

and AFTER masking what their animation looks like -

I found many issues with the approach I was trying to implement. Now instead od repositionin, grouping, etc.I am zooming the canvas