How to resize a image or path object?

[jdschwam]

I enjoy SIS. Thank you. It is doing everything I need, but there is one feature I have yet to get my head around. How to resize a path object that was imported via objects_from_svg_file(). I've tried for a month, learned a lot, and re-size is a no-go. I've mostly focused around Transform.

What I need to do is change variable Height/Width objects of various canvas sizes and viewport scales (embedded and not), into fixed sized (25mm x 25mm) objects.

This is an example of what I am trying.... the transform correctly positions the XY origin, but resizing does not

Modify Box

def get_percentage_increase(num_a, num_b):
try:
return abs((num_a - num_b) / num_b) * 100
except ZeroDivisionError:
return float('inf')

hc_scale = get_percentage_increase(25, horse_cow_obj.bounding_box().width)

# x0 = horse_cow_obj._transform.matrix[0][2]
# y0 = horse_cow_obj._transform.matrix[1][2]
hc_x = 5
hx_y = 5

try:
    horse_cow_obj.scale(hc_scale, 'ul')
    horse_cow_obj.transform ='translate(%s, %s), first= True' % (hc_x, hc_y)
    print("Horse-Cow Mod successful")
except:
    print("Horse-Cow Mod failed")

Any help is greatly appreciated. Thank you, Dan

[spakin]

I see two mistakes in the preceding code. First,

hx_y = 5

should be

hc_y = 5

Second, in

horse_cow_obj.transform ='translate(%s, %s), first= True' % (hc_x, hc_y)

the transform method accepts either an inkex.Transform or a string that can be used to construct an inkex.Transform. Neither of those recognize first=True. You were probably thinking of

horse_cow_obj.translate((hc_x, hc_y), first=True)

If you're targeting 25mm × 25mm objects, see Unit conversions in the Simple Inkscape Scripting documentation and also the documentation for Inkscape's inkex.units module. Those may facilitate targeting an absolute size.

[jdschwam]

Scott, Thanks for your quick reply. As you can guess, python coding is still new to me.
Thank you so much for the directions to pursue. I have looked into units before, for general reasons, but this topic is still confusing to me. With your direction, I will take on the effort to become very familiar with them. Thank you. Have a great Holiday weekend! Dan