Abuot BRDFVRayMtl BumpMap transform

[lic_pgm]

Hello,
VRay Version：Vray 5.20.20
In BRDFVRayMtl,I need a diffuse map and a bump map.one uv coords with different transform.
I set the uv coords like this:

VRay::ValueList channelDiff;
VRay::ValueList channelNorm;
channelDiff.push_back(VRay::Value(0));
channelDiff.push_back(VRay::Value(texCoords));
channelDiff.push_back(VRay::Value(&indices[indexStart_], indexCount_));

channelNorm.push_back(VRay::Value(1));
channelNorm.push_back(VRay::Value(texCoords));
channelNorm.push_back(VRay::Value(&indices[indexStart_], indexCount_));

VRay::ValueList mapChannels;
mapChannels.push_back(VRay::Value(channelDiff));
mapChannels.push_back(VRay::Value(channelNorm));
[B]mesh[/B].set_map_channels(mapChannels);

for diffuse map transform:

VRay::Plugins::TexBitmap diffuseMap...
...
VRay::Plugins::UVWGenChannel uvwchannel0 = mVRayRenderer->newPlugin<VRay::Plugins::UVWGenChannel>();
uvwchannel0.set_wrap_u(1);
uvwchannel0.set_wrap_v(1);
uvwchannel0.set_uvw_transform([B]transformDiff[/B]);
uvwchannel0.set_uvw_channel[B](0[/B]);
diffuseMap.set_uvwgen(uvwchannel0);
[B]brdf[/B].set_diffuse(diffuseMap);

for bump map transform

VRay::Plugins::TexBitmap bumpMap...
...
VRay::Plugins::UVWGenChannel uvwchannel1 = mVRayRenderer->newPlugin<VRay::Plugins::UVWGenChannel>();
uvwchannel1.set_wrap_u(1);
uvwchannel1.set_wrap_v(1);
uvwchannel1.set_uvw_transform([B]transformNrom[/B]);
uvwchannel1.set_uvw_channel[B](1[/B]);
normalMap.set_uvwgen(uvwchannel1);
[B]brdf[/B].set_bump_map(normalMap);
[B]brdf[/B].set_bump_type(1);

But I can`t get transfom effect of bump map,I want know where is the wrong,Or how do it in right way.
Thank you!

[stanislav.kirilov]

There may be other issues but the first thing I see is that the map_channels format you use is wrong. It is a List of Lists where each List has 3 components - number, IntList and a VectorList. In your case it should be ValueList(ValueList(Value(0), IntList(..), VecorList(..))).

[lic_pgm]

Hello，
My code references the sdk-cpp example "04-file-to-static-mesh" which the uvs set like this:

ValueList channels;
StringList channelNames;
const IntList& uvSetIndices = readData.getUVOriginalIndices();
for (int i = 0; i < readData.getUVSetsCount(); i++) {
ValueList channel(3);
const Vector* vectors = readData.getUVValues(i);
// 3 float values per Vector contained in the UVValues array
size_t vectorsCount = readData.getUVValuesCount(i) / 3;
const int* ints = readData.getUVValueIndices(i);
size_t intsCount = readData.getUVValueIndicesCount(i);

channel[0] = Value(uvSetIndices[i]);
channel[1] = Value(VectorList(vectors, vectors + vectorsCount));
channel[2] = Value(IntList(ints, ints + intsCount));
channels.push_back(Value(channel));
channelNames.push_back(readData.getUVSetName(i));
}
staticMesh.set_map_channels(channels);
staticMesh.set_map_channels_names(channelNames);

Except for the channelNames, it is basically the same as mine.

The description of the function set_map_channels goes like this：

//! A list of mapping channels; each channel itself is a list of 3 elements
//- the channel index, the channel vertices and the channel faces.
bool set_map_channels(const ValueList& list) { return setValue("map_channels", list); }

It's not the same as what you give“ValueList(ValueList(Value(0), IntList(..), VecorList(..)))”
And there are some syntax errors when compiling the way you do。

Or I just give me what I need：I have one uv for a mesh, two uv transform correspond to the diffuse_map and
bump_map respectively.What the right way to write should be

Thank you...

[stanislav.kirilov]

I'm sorry, it's my mistake about the map_channels format. Can you, please, write a vrscene-file by calling VRayRenderer::exportScene(fileName) or even better VRayRenderer::exportScene(fileName, exportSettings) (where exportSettings.compressed and exportSettings.hexArrays are set to false) and send it to us to inspect the data?

[lic_pgm]

OK，this is a simple sample，just a piece of mesh.
there is no diffuse map, with a bump map("Four_noormal.png").

[stanislav.kirilov]

uvwchannel1.set_uvw_transform(transformNrom);

looks correct in theory. The vrscene-file seems to render black (except the GI). I'm not sure if we can help more using this data. Probably a vrscene-file which renders and shows the (wrong) result and an image of what you expect might be useful.