Цей сайт найкраще переглядати в сучасному браузері з включеним JavaScript.

Mesh, MeshAttachment, Additive Blending

warmanw

Hi,

Is it possible to enable addivie blending on MeshAttachment using latest libgdx.

After digging in Spine classes i found SkeletonRenderer where. I copied part of code under the RegionAttachment if statement to the MeshAttachment if statement and it worked.

if (slot.data.getAdditiveBlending() != additive) {
    additive = !additive;
    if (additive)
       batch.setBlendFunction(srcFunc, GL20.GL_ONE);
    else
       batch.setBlendFunction(srcFunc, GL20.GL_ONE_MINUS_SRC_ALPHA);
 }

Is it correct way?

Nate

Yes that looks OK. I'll look more closely when I'm back.

warmanw

Hi,
One more issue.
When any attachment is blended textures drawn after it also are blended. so i added one line which fixed it. Could you please check it too.

if (slot.data.getAdditiveBlending() != additive) {
    additive = !additive;
    if (additive)
       batch.setBlendFunction(srcFunc, GL20.GL_ONE);
    else
       batch.setBlendFunction(srcFunc, GL20.GL_ONE_MINUS_SRC_ALPHA);
}
 
batch.draw(texture, vertices, 0, vertices.length, triangles, 0, triangles.length);

//brings Blending settings back
batch.setBlendFunction(srcFunc, GL20.GL_ONE_MINUS_SRC_ALPHA);

Pharan

What's the purpose of:

the outer if block and
the line that says additive = !additive?

warmanw

Yeah this if is hardly readable but it really works 🙂

additive=!additive; just inverts value

Nate could you please check the issue so we can continue.

warmanw написав

Hi,
One more issue.
When any attachment is blended textures drawn after it also are blended. so i added one line which fixed it. Could you please check it too.

if (slot.data.getAdditiveBlending() != additive) {
    additive = !additive;
    if (additive)
       batch.setBlendFunction(srcFunc, GL20.GL_ONE);
    else
       batch.setBlendFunction(srcFunc, GL20.GL_ONE_MINUS_SRC_ALPHA);
}
 
batch.draw(texture, vertices, 0, vertices.length, triangles, 0, triangles.length);

//brings Blending settings back
batch.setBlendFunction(srcFunc, GL20.GL_ONE_MINUS_SRC_ALPHA);

Can anyone help me? I am still waiting.

Søren

It's limited what help Nate can give at the moment I'm afraid with him being on vacation. Sorry for the wait 🙁

warmanw

Oki will wait for Nate.

however I have made some changes

batch.setBlendFunction(srcFunc, GL20.GL_ONE_MINUS_SRC_ALPHA);

line now is under the if statement and moved out from the for-loop.

if (additive)
   batch.setBlendFunction(srcFunc, GL20.GL_ONE_MINUS_SRC_ALPHA);