MeshVS_NodalColorPrsBuilder cannot set materials

FrankZNL
Fri, 02/10/2023 - 04:22

Forums:

Hello, I want to make the surface of MeshVS_Mesh shiny, as shown in picture1. In the picture left model is created using MeshVS_MeshPrsBuilder, it can set the material through:

meshvs_mesh->GetDrawer()->SetMaterial(MeshVS_DA_FrontMaterial, Graphic3d_NOM_SHINY_PLASTIC);

But when I use MeshVS_NodalColorPrsBuilder, I can't set the material with same function, and the display effect is on the right side of picture.

My test code is as follows,

Handle(MeshVS_Mesh) ais_mesh = new MeshVS_Mesh;
Handle(MeshDataSource) mesh_date = new MeshDataSource(mesh);
ais_mesh->SetDataSource(mesh_date);
// MeshVS_MeshPrsBuilder     Set material successfully
// Handle(MeshVS_MeshPrsBuilder) mesh_prs_builder = new MeshVS_MeshPrsBuilder(ais_mesh);
// MeshVS_NodalColorPrsBuilder   fail
Handle(MeshVS_NodalColorPrsBuilder) mesh_prs_builder = new MeshVS_NodalColorPrsBuilder(ais_mesh, MeshVS_DMF_NodalColorDataPrs | MeshVS_DMF_OCCMask);
for(int i = 1; i <= (mesh_date->GetEleNum()) * 3; i++)
{
    mesh_prs_builder->SetColor(i, Quantity_NOC_BISQUE);
}
ais_mesh->AddBuilder(mesh_prs_builder, true);
ais_mesh->UnsetMaterial();
ais_mesh->SetDisplayMode(MeshVS_DMF_Shading);
ais_mesh->SetMeshSelMethod(MeshVS_MSM_PRECISE);
ais_mesh->SetHilightMode(MeshVS_DMF_Shading);
ais_mesh->HilightAttributes()->SetColor(Quantity_NOC_YELLOW2);
ais_mesh->GetDrawer()->SetBoolean(MeshVS_DA_DisplayNodes, Standard_False);
ais_mesh->GetDrawer()->SetBoolean(MeshVS_DA_ShowEdges, Standard_False);
ais_mesh->GetDrawer()->SetMaterial(MeshVS_DA_FrontMaterial, Graphic3d_NOM_SHINY_PLASTIC);
ais_mesh->GetDrawer()->SetBoolean(MeshVS_DA_ColorReflection, Standard_True);

Attachments:

picture1.jpg

gkv311 n
Fri, 02/10/2023 - 20:55

MeshVS_NodalColorPrsBuilder configures material to make mapped colors clearly visible - shading make harm considerably mapped information. The only option you have is to enable MeshVS_DA_ColorReflection property. Otherwise, you may subclass MeshVS_NodalColorPrsBuilder or implement your own presentation builder taking code of existing builders as references.

Z Frank
Mon, 02/13/2023 - 06:31

OK，thanks for your reply!

Z Frank
Tue, 02/14/2023 - 09:17

Hello gkv,

When I use the AIS_Triangulation class, the gradient color seems to be combined with the color of the model's default material, how can I cancel the color of this material? Looking forward to your answer.

Attachments:

20230214140748.png

q zx
Mon, 03/18/2024 - 10:46

Hello Frank,
Did you solve the problem? I'm having the same problem right now

FrankZNL
Mon, 03/18/2024 - 11:26

You can initialize the material in the constructor and then modify the parameters material.SetEmissiveColor(Quantity_NOC_BLACK)

q zx
Mon, 03/18/2024 - 11:44

thanks for your reply! But I don't know how to solve it.
In your above code, my changes are as follows,
Graphic3d_MaterialAspect material(Graphic3d_NOM_SHINY_PLASTIC);
material.SetEmissiveColor(Quantity_NOC_BLACK);
ais_mesh->GetDrawer()->SetMaterial(MeshVS_DA_FrontMaterial, material);

FrankZNL
Mon, 03/18/2024 - 11:53

sorry, I don't know MeshVS. Finally, I used AIS_Triangulation to solve my problem.

q zx
Mon, 03/18/2024 - 11:56

OK，thanks for your reply!