How to set linetype to entity?

[michal-josef-spacek]

I have an example: red_line.tar.gz

Intention: Create a line, change color to red, create ltype, and use it in the created line.

I am curious, that in the DWG file isn't set ltype in the LINE entity.

What am I doing wrong?

	ltype = dwg_add_LTYPE(dwg, "New LTYPE");

	line = dwg_add_LINE(hdr, &pt1, &pt2);
	if (line != NULL) {
		// Red color.
		line->parent->color.index = 1; // Red color

		// Set line type.
		ltype_obj = dwg_obj_generic_to_object (ltype, &ret);
		line->parent->ltype = dwg_add_handleref (dwg, 5, ltype_obj->handle.value, NULL);
	}

[rurban]

This should really be a Discussions ticket. not an Issue btw

isbylayerlt is 1 by default. you need to unset it. for r2000+ also need to set ltype_flags to 0b11 (3) that a handle exists.

 VERSIONS (R_13b1, R_14) //ODA bug
    {
      FIELD_B (isbylayerlt, 0);
#ifdef IS_DECODER
      if (FIELD_VALUE (isbylayerlt))
        FIELD_VALUE (ltype_flags) = FIELD_VALUE (isbylayerlt) ? 0 : 3;
#endif
    }

patch

		line->parent->isbylayerlt = 0; // unset the default ltype
		line->parent->ltype_flags = 3; // for r2000+

=>

Object number: 28, Size: 0 [MS], Type: 19 [BS], Address: 2392
Encode entity LINE
handle: 0.1.26 [H 5] @3.2
num_eed: 0
preview_exists: 0 [B 0] @3.5
bitsize: 0 @2399.5
entmode: 2 [BB 0] @7.7
num_reactors: 0 [BL 0] @8.1
isbylayerlt: 0 [B 0] @8.2
nolinks: 1 [B 0] @8.3
color.index: 1 [CMC.BS 62] @9.5
ltype_scale: 1 [BD 48] @9.7
invisible: 0 [BS 60] @10.1
start: (0.000000, 0.000000, 0.000000) [3BD 10] @10.7
end: (100.000000, 100.000000, 0.000000) [3BD 11] @27.5
thickness: 0 [BT 39] @27.7
extrusion: (0.000000, 0.000000, 1.000000) [BE 210] @28.5
HANDLE_STREAM @28.5
-bitsize calc from HANDLE_STREAM 229 @28.5 (2392)
xdicobjhandle: (3.0.0) abs:0 [H 360] @29.5
layer: (5.1.10) abs:16 [H 8] @31.5
ltype: (5.1.25) abs:37 [H 6] @33.5
-size: 34 [MS] @2390
-bitsize: 229 [RL] @2395.5
padding: +3 [*B]
write CRC 3F56 [RSx] from 2390-2426 = 36

now just the ltype.name needs to be valid. spaces are forbidden.

Encode object LTYPE handle: 0.1.16 [H 5] num_eed: 0 bitsize: 0 [RL 0] @7.4 num_reactors: 0 [BL 0] @7.6 name: "CONTINUOUS" [T 2] @20.0 is_xref_ref: 1 [B 0] @20.1 is_xref_resolved: 0 [BS 0] @20.3 is_xref_dep: 0 [B 0] @20.4 xref: (5.0.0) abs:0 [H 0] @1.0 description: "Solid line" [T 3] @32.6 pattern_len: 0 [BD 0] @33.0 alignment: 0x41 [RC 72] @34.0 numdashes: 0x0 [RC 73] @35.0 strings_area: (null) [TF 256 0] HANDLE_STREAM @291.0 -bitsize calc from HANDLE_STREAM 2328 @291.0 (1506) ownerhandle: (12.1.11) abs:5 [H 330] @2.0 xdicobjhandle: (3.0.0) abs:0 [H 360] @3.0

vs

Encode object LTYPE handle: 0.1.25 [H 5] num_eed: 0 bitsize: 0 [RL 0] @7.4 num_reactors: 0 [BL 0] @7.6 name: "New LTYPE" [T 2] @19.0 is_xref_ref: 1 [B 0] @19.1 is_xref_resolved: 0 [BS 0] @19.3 is_xref_dep: 0 [B 0] @19.4 xref: (5.0.0) abs:0 [H 0] @1.0 description: "" [T 3] @19.6 pattern_len: 0 [BD 0] @20.0 alignment: 0x41 [RC 72] @21.0 numdashes: 0x0 [RC 73] @22.0 strings_area: (null) [TF 256 0] HANDLE_STREAM @278.0 -bitsize calc from HANDLE_STREAM 2224 @278.0 (2106) ownerhandle: (12.1.20) abs:5 [H 330] @2.0 xdicobjhandle: (3.0.0) abs:0 [H 360] @3.0

[rurban]

A new dwgapi dwg_ent_set_ltype() sugar function would be nice. We only have dwg_ent_get_ltype()

[michal-josef-spacek]

Ah, thank you, I will try.

[rurban]

I've adding now this api and some table name checks.

[michal-josef-spacek]

I checked the names, and you are right, something "a-zA-Z0-9-_$" and chars with diacritics. =r13 all letters in the resp. codepage. Thanks for code

[rurban]

Simplified API added