Question

I’m trying the moving limit after zoom with canvas scale, but new coordinates does not match.
my width 480, after 1.5f zooming my width will be 720… but when I set translate to -480, I’m seeing more space on the right.

float zoom = 0.5f;
PointF translate = new PointF(0, 0);
canvas.scale(zoom, zoom);
canvas.translate(translate.x, translate.y);
//...
canvas.drawRect(0, 0, width, height, paint);

sorry my bad English and explanation, but I want to ask in summary;
what is the true width/height limit for translate after zooming for moving the canvas?

Answer 1

I solved this problem as follows;

(screen resolution: 800×480 [landscape])

int screenWidth = 800;
int gameLimitX = 1600;
int cameraPositionX = 0;

float zoom = 1.0;

if((screenWidth / zoom) + cameraPositionX > gameLimitX) {
    cameraPositionX = (screenWidth / zoom) + cameraPositionX;
}

(do same for y/height)
I hope you can understand.