SOLVED Creating object that zoom automatically when created

[Telorr]

Hi everyone!
I'm a newbie here, so I need your help

I want to make object that when I created it (call it oZoomIn and oZoomOut), it will zoom in automatically (oZoomIn) and zoom out automatically (oZoomOut).
I don't have any idea to do it, because I don't understand about camera zooming yet.
My app native screen resolution is HD (1280x720p). I want that oZoomIn will zoom in to the center of the screen until the screen resolution is 960x540p.
And I want that oZoomOut will zoom out from the center of the screen. From 1280x720p to 1600x900p.

Can you please help me? I can't make them both, Thanks!

 

[Yal]

The easiest way probably is to make the camera view region bigger (increase its width and height) each step, you could have a width_start and width_end variable (1280 and 1600 respectively for ZoomOut, the reverse for ZoomIn) and then interpolate between them:

s += 0.01;//Set to 0 in create event. Adding 0.01 each step means the zoom takes 100 steps to complete.
w = lerp(w_start,w_end,s);
h = lerp(h_start,h_end,s);
camera_set_view_size(view_camera[0],w,h);
if(s >= 1){
  instance_destroy();
}

(as you can see, you'd obviously have separate start/end variables for height too)

 

[Telorr]

Thanks, It's work smoothly..
But, my ZoomIn object is zooms to the top left of the screen, not to the middle of the screen.

This is my oZoomIn create event:

s = 0;
w_start = 1280;
w_end = 960;
h_start = 720;
h_end = 540;
view_enabled = true;
view_visible[0] = true;
view_camera[0] = camera_create_view(0, 0, w_start, h_start);

Can you help me again?

 

[Yal]

Move the camera's x position left with half the width change (if the width got wider, it moves left, if it got narrower, it moves right):

///Update the step event code from last time like this

//Get old size
ow = camera_get_view_width(view_camera[0])
oh = camera_get_view_height(view_camera[0])

//Zoom
s += 0.01;//Set to 0 in create event. Adding 0.01 each step means the zoom takes 100 steps to complete.
w = lerp(w_start,w_end,s);
h = lerp(h_start,h_end,s);
camera_set_view_size(view_camera[0],w,h);
if(s >= 1){
  instance_destroy();
}

//Shift camera
camera_set_view_pos(view_camera[0],camera_get_view_x[0] - 0.5*(w - ow),camera_get_view_y[0] - 0.5*(h - oh))

 

[Telorr]

I changed the camera shift line a bit (because I encountered an error), from this:

//Shift camera camera_set_view_pos(view_camera[0],camera_get_view_x[0] - 0.5*(w - ow),camera_get_view_y[0] - 0.5*(h - oh))

To this:

camera_set_view_pos(view_camera[0], camera_get_view_x(view_camera[0]) - 0.5*(w - ow), camera_get_view_y(view_camera[0]) - 0.5*(h - oh))

Now, it's work perfectly
Thank you very much for your help!