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 # Test003

 Last update: 16.07.2025 

Unlighted vertex colored box.

This example shows how to create vertices that are colored by a particular RGBA value. <script src="/ansys/nexus/viewer-loader.js"></script>

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 \* Restricted Rights Legend

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 \* Use, duplication, or disclosure of this

 \* software and its documentation by the

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\#include <vector>

 

\#include "GLTFWriter.h"

\#include "test.h"

 

using namespace ANSYS::Nexus;

 

// Unlighted vertex colored box

TESTFUNC(UnlightedVertexColors)

{

 <a id="_a0" name="_a0"></a>[GLTFWriter::GLTF](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_g_l_t_f.xhtml) *gltf = GLTFWriter::GLTF::Create("MyApp", "1.0", functionName.c_str(), type);

 if (!gltf)

 throw std::runtime_error("Can't create GLTF");

 

 // SCENE

 <a id="_a1" name="_a1"></a>[GLTFWriter::Scene](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_scene.xhtml) *scene = GLTFWriter::Scene::Create(gltf, "TestScene", "m", 1.0, GLTFWriter::Scene::BT_SOLID, 0.5, 0.5, 0.5);

 if (!scene) {

 GLTFWriter::GLTF::Destroy(gltf);

 throw std::runtime_error("Can't create scene");

 }

 

 // MESH NODE

 {

 // NODE

 <a id="_a2" name="_a2"></a>[GLTFWriter::Node](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_node.xhtml) *node = GLTFWriter::Node::CreateMesh(gltf, "3D Box");

 if (!node || !scene-&gt;<a id="a3" name="a3"></a>[AppendMesh](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_scene.xhtml#adea272bb6570744737a12f7f639e40fd)(node)) {

 GLTFWriter::GLTF::Destroy(gltf);

 throw std::runtime_error("Can't create mesh node");

 }

 

 // MESH

 <a id="_a4" name="_a4"></a>[GLTFWriter::Mesh](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_mesh.xhtml) *mesh = GLTFWriter::Mesh::Create(gltf);

 if (!mesh || !node-&gt;<a id="a5" name="a5"></a>[AppendMesh](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_node.xhtml#a29e43db3c3bd933a51c2e99e223e41bd)(mesh)) {

 GLTFWriter::GLTF::Destroy(gltf);

 throw std::runtime_error("Can't create mesh");

 }

 

 GLTFWriter::Test::PrimMat pm = GLTFWriter::Test::CreateColoredBoxPrimitive(gltf, 0, 0, 0, 1, 1, 1);

 mesh-&gt;<a id="a6" name="a6"></a>[AppendPrimitive](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_mesh.xhtml#a392eddd58e41d83d7df11e7e48ed4798)(pm.first);

 }

 

 if (!gltf-&gt;<a id="a7" name="a7"></a>[Write](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_g_l_t_f.xhtml#a7a468ecf1f594b411023782d18f08823)()) {

 GLTFWriter::GLTF::Destroy(gltf);

 throw std::runtime_error("Error creating file");

 }

 

 [GLTFWriter::GLTF::GLTFError](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_g_l_t_f.xhtml#acf83a4d185d959503cb9f3f2c2e9fafe) error = gltf-&gt;<a id="a8" name="a8"></a>[GetError](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_g_l_t_f.xhtml#a812b885f21ed48bad70fea6b03e76913)();

 

 GLTFWriter::GLTF::Destroy(gltf);

 

 if (error != GLTFWriter::GLTF::GLTF_ERROR_NONE)

 throw std::runtime_error("Error creating file");

}

[ANSYS::Nexus::GLTFWriter::GLTF](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_g_l_t_f.xhtml)

This is the main class of the GLTFWriter.

**Definition:** [GLTFGLTF.h:32](_g_l_t_f_g_l_t_f_8h_source.xhtml#l00031)



[ANSYS::Nexus::GLTFWriter::GLTF::Write](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_g_l_t_f.xhtml#a7a468ecf1f594b411023782d18f08823)

virtual bool Write(bool formatJSON=false)=0



[ANSYS::Nexus::GLTFWriter::GLTF::GetError](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_g_l_t_f.xhtml#a812b885f21ed48bad70fea6b03e76913)

virtual GLTFError GetError()=0



[ANSYS::Nexus::GLTFWriter::GLTF::GLTFError](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_g_l_t_f.xhtml#acf83a4d185d959503cb9f3f2c2e9fafe)

GLTFError

**Definition:** [GLTFGLTF.h:35](_g_l_t_f_g_l_t_f_8h_source.xhtml#l00035)



[ANSYS::Nexus::GLTFWriter::Mesh](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_mesh.xhtml)

Meshes define the renderable objects that can be added to a node.

**Definition:** [GLTFMesh.h:104](_g_l_t_f_mesh_8h_source.xhtml#l00103)



[ANSYS::Nexus::GLTFWriter::Mesh::AppendPrimitive](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_mesh.xhtml#a392eddd58e41d83d7df11e7e48ed4798)

virtual bool AppendPrimitive(Primitive *primitive)=0



[ANSYS::Nexus::GLTFWriter::Node](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_node.xhtml)

Nodes are the GLTFWriter class that contain the data that is defined in the GLTF file.

**Definition:** [GLTFNode.h:31](_g_l_t_f_node_8h_source.xhtml#l00030)



[ANSYS::Nexus::GLTFWriter::Node::AppendMesh](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_node.xhtml#a29e43db3c3bd933a51c2e99e223e41bd)

virtual bool AppendMesh(Mesh *mesh)=0



[ANSYS::Nexus::GLTFWriter::Scene](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_scene.xhtml)

Scenes are the GLTFWriter class that create the view of the data that is defined in the GLTF file.

**Definition:** [GLTFScene.h:29](_g_l_t_f_scene_8h_source.xhtml#l00028)



[ANSYS::Nexus::GLTFWriter::Scene::AppendMesh](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_scene.xhtml#adea272bb6570744737a12f7f639e40fd)

virtual bool AppendMesh(Node *mesh)=0