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materials and mappers

materials and mappers
hello,
i'm currently trying to write autocad r17 compatible materials to a dwg.
defining materials is working almost fine. the problem however lies within the assignment of the materials to my blockinserts.
autocad 2007 shows the materials correctly assigned to the inserts of my blocks. but when rendered all surfaces appear pure white.
when i assign the material to a volume drawn by hand the material is displayed correctly.
my block-structure looks like this:
btr:
- anonymous block 1 referencing b1...bn (these entities have the materials assigned)
.
.
.
- anonymous block n
- b1
.
.
.
- bn
modelspace:
block referencing anonymous blocks
any help concerning this is appreciated.
there are some more questions regarding the mapping of materials:
1) how do i set the diffuse and specular channel of an material without providing a texture (there is no overload of setdiffuse that only has the color as parameter)
2) how are materials handled when writing to an older file format such as ac1018?
cheers
psy
p.s. i've attached a sample file which suffers from incorrect materials
attached files (22.2 kb, 1 views)

last edited by psy; 9th october 2007 at 06:55 amfff">. reason: attachment

psy
# 10th october 2007, 10:23 am

moderator join date: mar 2002
posts: 2,994
if you want 3dsolids be rendered with materials assigned to block reference you need set material of 3dsolids inside the block to byblock.
materials are round-tripped through r13+ versions as is. by minor autocads they are ignored (interpreted as proxies). if the file is loaded back into ac2007+ they are restored.
sergey slezkin

sslezkin
# 12th october 2007, 01:34 am

registered user join date: mar 2007
posts: 12

quote:
originally posted by sergey slezkin
if you want 3dsolids be rendered with materials assigned to block reference you need set material of 3dsolids inside the block to byblock.
thanks so far.
okay, but how exactly do i set it to byblock. i've found methods to retrieve if the material *is* set byblock/layer etc. but i didn't find a method to set it.
cheers psy
last edited by psy; 12th october 2007 at 01:46 amfff">.

psy
# 15th october 2007, 06:37 pm

moderator join date: mar 2002
posts: 2,994
code:
p3dsolid->setmaterial(pdatabase->byblockmaterialid());
sergey slezkin

sslezkin
# 22nd october 2007, 07:02 am

registered user join date: mar 2007
posts: 12

thank you very much!
this did work only after i created a material called "byblock".
cheers
psy

psy

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if you want 3dsolids be rendered with materials assigned to block reference you need set material of 3dsolids inside the block to byblock.
materials are round-tripped through r13+ versions as is. by minor autocads they are ignored (interpreted as proxies). if the file is loaded back into ac2007+ they are restored.
sergey slezkin

quote:
originally posted by sergey slezkin
if you want 3dsolids be rendered with materials assigned to block reference you need set material of 3dsolids inside the block to byblock.
thanks so far.
okay, but how exactly do i set it to byblock. i've found methods to retrieve if the material *is* set byblock/layer etc. but i didn't find a method to set it.
cheers psy
last edited by psy; 12th october 2007 at 01:46 amfff">.
code:
p3dsolid->setmaterial(pdatabase->byblockmaterialid());
sergey slezkin

thank you very much!
this did work only after i created a material called "byblock".
cheers
psy