topic Scale or Stretch Texture on the Surface in GDL

Scale or Stretch Texture on the Surface

galiaf_velikiy — Wed, 01 Oct 2025 21:32:06 GMT

Hi, guys. Could you please help me achieve the same scale effect as in SketchUp? The Unproportional Scale is also what I need. Thank you.

Re: Scale or Stretch Texture on the Surface

Lingwisyer — Mon, 13 Mar 2023 01:20:42 GMT

I think you can just use the COOR commands?

Re: Scale or Stretch Texture on the Surface

galiaf_velikiy — Mon, 13 Mar 2023 08:37:23 GMT

I am already using COOR3.

bms_buildingMatAttribute_1 = 0 r = REQUEST{2} ("Building_Material_info", buildingMatAttribute_1, "gs_bmat_surface", bms_buildingMatAttribute_1) mulx A/ 3 muly B/ 3 mulz ZZYZX/ 1 body -1 model solid resol 36 pen penAttribute_2 set building_material buildingMatAttribute_1, DEFAULT, DEFAULT sect_attrs{2} penAttribute_3, lineTypeAttribute_1 vert{2} 0, 0, 0, 1 ! #1 VertId=0 vert{2} 0, 3, 0, 1 ! #2 VertId=0 vert{2} 3, 0, 0, 1 ! #3 VertId=0 vert{2} 3, 3, 0, 1 ! #4 VertId=0 pen penAttribute_2 edge 1, 3, 1, 0, 262144 ! #1 EdgeId=0 edge 4, 2, 1, 0, 262144 ! #2 EdgeId=0 edge 2, 1, 1, 0, 262144 ! #3 EdgeId=0 edge 3, 4, 1, 0, 262144 ! #4 EdgeId=0 vect 0, 0, 1 ! #1 material materialAttribute_1 pgon{3} 4, 1, 2, 6, 0, -3.000758471779, -2.992290207747, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, ! #1 PolyId=0 1, 4, 2, 3 material bms_buildingMatAttribute_1 coor{3} 6, 8, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1 body 262182 material 0 body -1

Re: Scale or Stretch Texture on the Surface

Barry Kelly — Mon, 13 Mar 2023 08:44:05 GMT

COOR{3} can determine the origin of the surface, it direction and the method it is wrapped, but I am not 100% sure if it can stretch the surface.

Does it need to be done in GDL or can you just create a duplicate surface and increase the size of the texture?

Barry.

Re: Scale or Stretch Texture on the Surface

galiaf_velikiy — Mon, 13 Mar 2023 08:52:46 GMT

it should be a GDL, I need it for the multiple-use case.

Re: Scale or Stretch Texture on the Surface

MetalFingerz — Mon, 13 Mar 2023 16:19:16 GMT

@galiaf_velikiy ,

It's possible to scale a texture dynamically by having a DEFINE TEXTURE with scaling variables (and then doing a DEFINE MATERIAL with said texture) but I don't know if it's possible to extract the texture name from a REQUESTed material.

If you already know which texture you want, you could hardcode it directly maybe.

Re: Scale or Stretch Texture on the Surface

runxel — Mon, 13 Mar 2023 16:53:40 GMT

It's possible, even tho you must need to do some contortions.

file_name = "" rrr = request{2}("Material_info", old, "gs_mat_texture", file_name, w, h, mask, alpha) define texture "new" file_name, w*2, h*2, mask, alpha tex_id = ind(TEXTURE, "new") str_name_of_mat = "" rrr = request("Name_of_Material", old, str_name_of_mat) define material "new_mat" based_on str_name_of_mat, parameters gs_mat_texture_ind = tex_id mat_id = ind(MATERIAL, "new_mat") material old brick 1,1,0.1 addx 1.3 material mat_id brick 1,1,0.1

Don't get hurt.

Re: Scale or Stretch Texture on the Surface

Victor Vernaglia — Wed, 01 Oct 2025 12:56:19 GMT

I copied and pasted your script (created the "old" parameter) and got the error message, am I doing something wrong?
"Error in definition of materials used at line 21 in the 3D script of file Untitled-1.gsm."

Re: Scale or Stretch Texture on the Surface

runxel — Wed, 01 Oct 2025 15:24:30 GMT

Could be a GDL bug? I encounter this too, in AC 28.

However it still works. So I'm not really sure why it's nagging here.

Re: Scale or Stretch Texture on the Surface

Victor Vernaglia — Wed, 01 Oct 2025 17:45:01 GMT

Yes, it's working, but this error message is very annoying. Thanks for the reply.

Re: Scale or Stretch Texture on the Surface

Victor Vernaglia — Wed, 18 Feb 2026 19:52:18 GMT

Another question, using "define texture" and "define material", is there any way to make the texture respond to the four texture distribution option buttons located in the surface settings?

Re: Scale or Stretch Texture on the Surface

runxel — Wed, 18 Feb 2026 22:03:06 GMT

Yes, but in the manual I find it not very well explained.

Basically you need to set the status in define texture "name" "filename.jpg", x, y, status, angle to one of these:

64: random
128: mirrored in X
256: mirrored in Y
384: mirrored in X/Y