I’m trying to write a simple app which demonstrates how my packed fonts can be rendered in LibGDX. I asked it to render at (0, 0) and it starts rendering at bottom-down corner. I’ve wanted it at up-left corner so from the wiki, I used the following in the [icode]create()[/icode] method.
cam = new OrthographicCamera();
cam.setToOrtho(true, 800, 600);
But it still renders in the bottom-left corner. What should I do?
I’m rendering the texture like this. Does it matter?
batch.begin();
{
batch.draw(tex, x, y);
}
batch.end();
I never use setToOrtho method, just pass those value to constructor.
Btw I don’t really clear the problem. So you want to move the origin back to Java2D (up-left)?
I never do this. I just recalculate the Y with height subtraction since it’s safer to do that.
My idea:
Could you give me some clarity? An example? I don’t understand.
I just want to draw a texture on top of the screen. And leave others at the default position.
Have you added:
batch.setProjectionMatrix(cam.combined);
batch.begin();
...
?
I am not on Eclipse right now,
cam = new OrthographicCamera(800, -600, true);
Dunno what will happen though :
The same. No change at all. I’ve also tried calling the update and apply methods. But no use.
After changing your camera, like this:
You need to change your batch’s projection matrix:
[icode]batch.setProjectionMatrix(camera.combined);
… render sprites …[/icode]
and yes the characters will be upside down.
if you use ydown you have to flip your textures as well
sprite.flip(false, true);
or do it in your graphical program.
I can’t create a new sprite for each texture. Can we directly flip the texture?
Don’t flip texture; that would involve re-arranging byte data. Instead, flip the texture region that encapsulates your texture. You should learn about textures and texture regions here:
Generally speaking you shouldn’t be using Texture except for low-level purposes, or to hold a single texture atlas. Instead it is better to use Sprite (which caches vertex data) or TextureRegion.
If you are loading your Sprites through a TextureAtlas: // (this is good practice right? 
)
TextureAtlas atlas = new TextureAtlas(Gdx.files.internal(“data/pack.pack”), true);
The last boolean will flip the y in your whole textureatlas. C.f.: http://libgdx.badlogicgames.com/nightlies/docs/api/com/badlogic/gdx/graphics/g2d/TextureAtlas.html#TextureAtlas(com.badlogic.gdx.files.FileHandle, boolean)