Gaps within tk2dStaticSpriteBatcher

[robinouu]

Hi !

I have gap issues when trying to fill a tk2dStaticSpriteBatcher with batched sprites (30x30 pixels).
I am using a custom sprite collection data (needed for dynamic resource loading)

PART 1 : Get the sprite collection data

Code: [Select]

Texture2D texture = tilesetPost.texture; // from WWW

int i = 0, nbSprites = (texture.width / 30) * (texture.height / 30);
Rect[] regions = new Rect[nbSprites];
Vector2[] anchors = new Vector2[nbSprites];
string[] names = new string[nbSprites];

Vector2 anchor = new Vector2(0, 0);
for (int y = 0; y < texture.height; y += 30)
{
for (int x = 0; x < texture.width; x += 30)
{
regions[i] = new Rect(x, y, 30, 30);
anchors[i] = anchor;
names[i] = (x/30) + "_" + (y/30);
++i;
}
}

tk2dRuntime.SpriteCollectionSize size = tk2dRuntime.SpriteCollectionSize.ForTk2dCamera();
tk2dSpriteCollectionData spriteData = tk2dSpriteCollectionData.CreateFromTexture(texture, size, names, regions, anchors);

PART 2 : the batcher

Code: [Select]

GameObject batcherObject = new GameObject("Batcher");
tk2dStaticSpriteBatcher batcher = batcherObject.AddComponent<tk2dStaticSpriteBatcher>();
batcher.spriteCollection = spriteData;

for (int y = 0; y < srcH; ++y)
{
for (int x = 0; x < srcW; ++x)
{
tk2dBatchedSprite sprite = new tk2dBatchedSprite();
sprite.spriteId = sprData.GetSpriteIdByName(x + "_" + y);

sprite.position = new Vector3(destX, destY, 0);
sprites.Add(sprite);
}
}

batcher.batchedSprites = sprites.ToArray();
batcher.Build();


And, as I am getting the collection data from code, i did not found any way to set the Pad option to Extend.
Is there any way to remove these gaps ?


Thanks for your support.

[unikronsoftware]

If you do it like that at runtime, your texture won't have any padding and there isn't any way to add it at runtime - it would cost too much, and the code just isn't there.

If you set filtering to point on the texture, you'll get a lot less of those lines... it might even get rid of it completely.

[robinouu]

If you do it like that at runtime, your texture won't have any padding and there isn't any way to add it at runtime - it would cost too much, and the code just isn't there.

Yes, you are true.

If you set filtering to point on the texture, you'll get a lot less of those lines... it might even get rid of it completely.

Hum... not really. There are still many artifacts.

[unikronsoftware]

Your best bet is to manually add padding to the texture if you can.

If you can send me a repro case to support@unikronsoftware.com I could take a look and see if there is anything that can be done, but its almost impossible to say without actually seeing specific issue.

[robinouu]

Oh my mistake. I was using 0.00x coordinates to move the camera. Everything is OK with 0.0x floats and texture.FilterMode to Point.

Thanks for your assistance !

[robinouu]

I noticed also that my texture is badly rendered using the above code (with point filter mode), there are some strange semi-white borders around the palm tree, as you can see
I tried the same with the basic workflow (manually adding the texture to a sprite collection) and they disappear...

Is this related to the fact I am loading the texture with WWW ?

[unikronsoftware]

Are you loading it into a compressed texture?
Its totally possible to do it using www, but you need to ensure your texture is correct before doing anything else.

[robinouu]

So, i have made a few test, without using the WWW method, but just the same original Texture2D (NPOT/RGBA 32-bits/120x60/PNG/filter point) :

using the tk2d editor :


using tk2dSpriteCollectionData.CreateFromTexture :


I could not find any solution. I first though that there was an issue with the PNG alpha channel, but it is really not.

[unikronsoftware]

Are mipmaps on with the texture2D?
Also, this:
http://unikronsoftware.com/2dtoolkit/forum/index.php/topic,612.msg5221.html#new

[robinouu]

I dont' know why but using power of two texture did the trick...
I have checked all the texture importer yet, but Unity3D is apparently performing (and forcing) some kind of interpolation internally. 

Very strange.

[robinouu]

I could not find a way to solve this gaps problem.
I though it was related to the player position, but even with int positions i have these gaps.

The sprite collections are generated dynamically from texture.


What can I do to prevent it ?

[unikronsoftware]

Is it a perspective / ortho camera?

[robinouu]

We use the orthographic projection.
I tried to change the generated texture to Point, and to modify camera override autoscale, without success

[unikronsoftware]

Try adding one pixel of padding in the sprite collection editor (extend, not blackzeroalpha), might help.

[robinouu]

We do not use the sprite collection editor, because we nedd dynamically loaded textures (using tk2dSpriteCollectionData.CreateFromTexture)
Is it possible to do this kind of padding by code ?