skins | Create a player 's skin out of blocks | Media Player library

JavaFX has no built-in concept to animate a triangle mesh. But nothing keeps you from manipulating the geometry of the mesh at runtime yourself. If you can compute the necessary changes of the geometry you can use an AnimationTimer to drive that process.

You downloaded flutter using the zip link instead of git clone. At least that I suppose with that message

Try go to the folder:

The tricky part here is meeting the apparent uniqueness requirements, for which the following generic filter can be used:

This question led to a nice discussion on the allegro forums Credits to Dizzy Egg for working out this example in full detail. I'll summarize the answer here for future reference.

A solution with al_tinted_bitmap is definitely possible, but I'd choose the get_pixel / put_pixel approach as you have a bit more control. It's not hard to replace pixels of one color with pixels of another color. Just loop over each pixel in the bitmap and do this:

What you are trying to solve here is a variation of the Knapsack Problem. This means there is no solution in polynomial time possible.

However you can do a few optimizations: In No circumstance will somebody buy pack #2. It is strictly inferior to buying 2 (or 1) pack #1, therefore we can immediately eliminate it for the algorithm so it does not have to waste time on it ;)

When you iterate over the colors array and check if (args[0].includes(colors[i])) you check if a string includes the colors[i] string. String#includes checks if one string (colors[i]) is found within another string (args[0]).

The example below shows how it works. It checks every item in colors one by one:

try to click with javascript:

One thing to keep in mind is that the vertex shader is executing within the context of the skinned mesh node, not the skeleton root or joints. This means that the model view matrix is potentially in a "meaningless" place: This skinned node may have been given a transformation, but it won't be affected by that as all of its vertices are controlled by joints instead. The glTF Validator will even warn if a skinned node is NOT a root node, for this reason, as transforms applied to the skin itself are no-ops.

So the steps needed for any particular vertex in the skin then are:

1. Undo the skin's world-to-node transformations, if any.
2. Apply the joint's world-to-joint transformations.
3. Undo the "rest" position of the joint.

These three steps correspond to the three you listed from the tutorial.

Let's talk about the third one. Each joint has a "rest" position. For example an arm bone might be at rest in the left arm of the skin's original shape (bind pose), and a leg bone might be in the right leg for example. These bones don't sit at the origin, they are sprinkled all around the model. But we don't want them pulling vertices around when they are in the rest position, for example the arm bone might be above and to the left of the origin but shouldn't pull any vertices up and to the left when it's at rest.

So each joint has an "inverse bind matrix" that undoes the effects that the joint would naturally have in its own rest position. When the joint moves, it moves relative to its own rest position, and that delta (the difference between steps 2 and 3) is what gets applied to the target vertex.

If the skin itself tries to move, nothing happens. Such a transform is applied to u_modelViewMatrix at the end of the tutorial's shader, and the inverse of that transform is applied in step 1, so they cancel out. If you wanted to move the entire skinned mesh, of course the correct way to do that is by repositioning the whole skeleton, not the skinned node. Moving the root joint would apply new transformations in step 2 for all vertices in the mesh.

If you're working from sources then the skin file for iPhoneX needs to be in the JavaSEPort/src. Normally the build script copies it but we've undergone some changes in our build process and it's possible this is no longer seamless.