How to draw image relatively?

[WgZgYn]

For example, if want draw elements in the block or the layout like the grid, what should I do? I know the ebiten.DrawImageOptions struct, but I don't know how to set the original point, every time I call op.GeoM.Reset() the point comes to (0, 0). I hope there a Postion struct construct with const original point, and do the same thing as DrawImageOptions, but the Reset() could recover the original point not (0, 0). In my game I design a simple Pos struct, I want to know whether ebitengine have a similar struct? Whether it is necessary?

[hajimehoshi]

What about

op.GeoM.Reset()
op.GeoM.Translate(originalX, originalY)

?

[WgZgYn]

yeap thank you. I konw the op.GeoM.Translate(originalX, originalY).
But firstly the op most time is a pointer value, if I pass the op to a function, it is maybe changed, and I don't know a good way to make a copy of the op.
And, I don't know how to get the current point from the DrawImageOption directly to save the originalX and originalY, when it comes to complex layout calculating absolute postion is much difficult.
I am confused about the game programming style. ( x _ x )

[hajimehoshi]

You can copy GeoM value and use this.

var g0 GeoM
g0.Translate(1, 2)
g1 := g0 // g0 is copied.
g0.Rotate(1) // this doesn't affect g1

[WgZgYn]

I will try it. Thanks😃