## On this page # Test001 Last update: 16.07.2025 Lighted textured box. This example creates a simple box object that is colored by a randomized texture coordinate that ranges from -5 to +5. The texture coordinate is applied to TEXCOORD0 so that the ANSYSViewer can show the texture coordinate value in the tooltip. This simulates coloring a mesh by a variable value. Two lights are added to the scene to provide feature enhancement as the scene is transformed in the [ANSYS](namespace_a_n_s_y_s.xhtml "GLTFWriter API Documentation.") Viewer. An orthographic camera is added to the scene with a default identity transformation. Because of this identity transformation, the simple box is not initially positioned in the most optimal location in the scene. The shaders for this example are automatically generated by the GLTFWriter API. <script src="/ansys/nexus/viewer-loader.js"></script> /\* \* Copyright 2018-2021 ANSYS, Inc. Unauthorized use, distribution, or duplication is prohibited. \* \* Restricted Rights Legend \* \* Use, duplication, or disclosure of this \* software and its documentation by the \* Government is subject to restrictions as \* set forth in subdivision \[(b)(3)(ii)\] of \* the Rights in Technical Data and Computer \* Software clause at 52.227-7013. \*/ \#include <vector> \#include "GLTFWriter.h" \#include "test.h" using namespace ANSYS::Nexus; // Lighted textured box TESTFUNC(LightedTextured) { GLTFWriter::GLTF *gltf = [GLTFWriter::GLTF::Create](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_g_l_t_f.xhtml#ab7ba6d114c76cb60baf41aa6f13e9494)("MyApp", "1.0", functionName.c_str(), type); if (!gltf) throw std::runtime_error("Can't create GLTF"); // SCENE GLTFWriter::Scene *scene = [GLTFWriter::Scene::Create](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_scene.xhtml#aac8bcb85d4361abba99053b3c56eb08b)(gltf, "TestScene", "m", 1.0, [GLTFWriter::Scene::BT\_SOLID](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_scene.xhtml#ac17baf491cdba3613b0aa39719a3dbd8aeea551002921bb989b3ed35678ec982b), 0.5, 0.5, 0.5); if (!scene) { [GLTFWriter::GLTF::Destroy](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_g_l_t_f.xhtml#a586171eb8e873e909db02a7eb4d80f5c)(gltf); throw std::runtime_error("Can't create scene"); } // LIGHTS { // LIGHT NODE GLTFWriter::Node *lightNode = [GLTFWriter::Node::CreateLight](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_node.xhtml#a7883624afdcaae45b6018944a040a01c)(gltf); if (!lightNode || !scene->SetLight(lightNode)) { [GLTFWriter::GLTF::Destroy](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_g_l_t_f.xhtml#a586171eb8e873e909db02a7eb4d80f5c)(gltf); throw std::runtime_error("Can't create light"); } // LIGHTS GLTFWriter::Light *light1 = [GLTFWriter::Light::CreateAmbient](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_light.xhtml#a14a825d32570498d64b6a427fb4f8207)(gltf); if (!light1 || !lightNode->AppendLight(light1)) { [GLTFWriter::GLTF::Destroy](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_g_l_t_f.xhtml#a586171eb8e873e909db02a7eb4d80f5c)(gltf); throw std::runtime_error("Can't create ambient light"); } GLTFWriter::Light *light2 = [GLTFWriter::Light::CreateDirectional](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_light.xhtml#aa54e23609ac5f7a1a6808b62ee48163d)(gltf, 1, 1, 1, -1, -1, -1); if (!light2 || !lightNode->AppendLight(light2)) { [GLTFWriter::GLTF::Destroy](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_g_l_t_f.xhtml#a586171eb8e873e909db02a7eb4d80f5c)(gltf); throw std::runtime_error("Can't create directional light"); } } // CAMERA { // CAMERA GLTFWriter::Camera *camera = [GLTFWriter::Camera::CreateOrthographic](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_camera.xhtml#acab0b8344a7bb8b65c9690d221705377)(gltf); if (!camera) { [GLTFWriter::GLTF::Destroy](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_g_l_t_f.xhtml#a586171eb8e873e909db02a7eb4d80f5c)(gltf); throw std::runtime_error("Can't create orthographic camera"); } // CAMERA NODE std::vector<double> mat(16); mat[0] = 5.196278945; mat[1] = -4.840306463; mat[2] = 4.029489439; mat[3] = 0; mat[4] = -5.359816103; mat[5] = -0.655435923; mat[6] = 6.124495225; mat[7] = 0; mat[8] = -3.307222875; mat[9] = -6.54282078; mat[10] = -3.594501324; mat[11] = 0; mat[12] = 0.124828378; mat[13] = 0.10487708; mat[14] = 0.152340059; mat[15] = 1; GLTFWriter::Node *cameraNode = [GLTFWriter::Node::CreateCamera](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_node.xhtml#af6c4767cc8271d9d39816d278538197a)(gltf, camera, "TestCamera", &mat[0]); if (!cameraNode || !scene->SetCamera(cameraNode)) { [GLTFWriter::GLTF::Destroy](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_g_l_t_f.xhtml#a586171eb8e873e909db02a7eb4d80f5c)(gltf); throw std::runtime_error("Can't set camera"); } } // MESH NODE { // NODE std::vector<double> mat(16); mat[0] = 1; mat[1] = 0; mat[2] = 0; mat[3] = 0; mat[4] = 0; mat[5] = 1; mat[6] = 0; mat[7] = 0; mat[8] = 0; mat[9] = 0; mat[10] = 1; mat[11] = 0; mat[12] = 1; mat[13] = 1; mat[14] = 1; mat[15] = 1; GLTFWriter::Node *node = [GLTFWriter::Node::CreateMesh](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_node.xhtml#a4dd14791b2b9e65c115aa7a9e3f340e8)(gltf, "3D Box", true, &mat[0]); if (!node || !scene->AppendMesh(node)) { [GLTFWriter::GLTF::Destroy](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_g_l_t_f.xhtml#a586171eb8e873e909db02a7eb4d80f5c)(gltf); throw std::runtime_error("Can't create mesh node"); } // MESH GLTFWriter::Mesh *mesh = [GLTFWriter::Mesh::Create](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_mesh.xhtml#a9f7803b1b1eb72e4005665ca33f42788)(gltf); if (!mesh || !node->AppendMesh(mesh)) { [GLTFWriter::GLTF::Destroy](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_g_l_t_f.xhtml#a586171eb8e873e909db02a7eb4d80f5c)(gltf); throw std::runtime_error("Can't create mesh"); } // TEXTURE std::vector<unsigned char> colors; colors.push_back(0); colors.push_back(0); colors.push_back(255); // blue colors.push_back(0); colors.push_back(255); colors.push_back(255); // cyan colors.push_back(0); colors.push_back(255); colors.push_back(0); // green colors.push_back(255); colors.push_back(255); colors.push_back(0); // yellow colors.push_back(255); colors.push_back(0); colors.push_back(0); // red colors.push_back(255); colors.push_back(0); colors.push_back(255); // magenta GLTFWriter::Texture *rainbowGradientTexture = [GLTFWriter::Texture::Create](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_texture.xhtml#a3d15e0e6ad83cd7d50bb81ce2d0f30c8)(gltf, [GLTFWriter::Texture::TF\_RGB](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_texture.xhtml#aba6db4f52b9f0a1a866bce302b6d8964aaa8ea9a0e6b83932a6a882b1655e8e59), (unsigned int)colors.size() / 3, &colors[0], true); if (!rainbowGradientTexture) { [GLTFWriter::GLTF::Destroy](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_g_l_t_f.xhtml#a586171eb8e873e909db02a7eb4d80f5c)(gltf); throw std::runtime_error("Can't create texture"); } GLTFWriter::Test::PrimMat pm = GLTFWriter::Test::CreateTexturedBoxPrimitive(gltf, rainbowGradientTexture, 0, 0, 0, 2, 4, 6); mesh->AppendPrimitive(pm.first); } if (!gltf->Write()) { [GLTFWriter::GLTF::Destroy](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_g_l_t_f.xhtml#a586171eb8e873e909db02a7eb4d80f5c)(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->GetError(); [GLTFWriter::GLTF::Destroy](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_g_l_t_f.xhtml#a586171eb8e873e909db02a7eb4d80f5c)(gltf); if (error != [GLTFWriter::GLTF::GLTF\_ERROR\_NONE](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_g_l_t_f.xhtml#acf83a4d185d959503cb9f3f2c2e9fafea049c3b804e69ae05c02f4c2dedf4e0ea)) throw std::runtime_error("Error creating file"); } [ANSYS::Nexus::GLTFWriter::Camera::CreateOrthographic](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_camera.xhtml#acab0b8344a7bb8b65c9690d221705377) static Camera * CreateOrthographic(GLTF *gltf, const char *name=0, float xmag=1, float ymag=1, float zfar=1000, float znear=-1000) [ANSYS::Nexus::GLTFWriter::GLTF::Destroy](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_g_l_t_f.xhtml#a586171eb8e873e909db02a7eb4d80f5c) static void Destroy(GLTF *gltf) [ANSYS::Nexus::GLTFWriter::GLTF::Create](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_g_l_t_f.xhtml#ab7ba6d114c76cb60baf41aa6f13e9494) static GLTF * Create(const char *application, const char *applicationVersion, const char *filePath, OutputType fileType=OT_AVZ) [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::GLTF::GLTF\_ERROR\_NONE](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_g_l_t_f.xhtml#acf83a4d185d959503cb9f3f2c2e9fafea049c3b804e69ae05c02f4c2dedf4e0ea) @ GLTF_ERROR_NONE No Error. **Definition:** [GLTFGLTF.h:36](_g_l_t_f_g_l_t_f_8h_source.xhtml#l00036) [ANSYS::Nexus::GLTFWriter::Light::CreateAmbient](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_light.xhtml#a14a825d32570498d64b6a427fb4f8207) static Light * CreateAmbient(GLTF *gltf, float colR=0.3, float colG=0.3, float colB=0.3) [ANSYS::Nexus::GLTFWriter::Light::CreateDirectional](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_light.xhtml#aa54e23609ac5f7a1a6808b62ee48163d) static Light * CreateDirectional(GLTF *gltf, float colR=1, float colG=1, float colB=1, float dirX=0, float dirY=0, float dirZ=-1, float specColR=1, float specColG=1, float specColB=1, float shininess=100) [ANSYS::Nexus::GLTFWriter::Mesh::Create](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_mesh.xhtml#a9f7803b1b1eb72e4005665ca33f42788) static Mesh * Create(GLTF *gltf) [ANSYS::Nexus::GLTFWriter::Node::CreateMesh](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_node.xhtml#a4dd14791b2b9e65c115aa7a9e3f340e8) static Node * CreateMesh(GLTF *gltf, const char *name=0, bool visible=true, const double *matrix=0) [ANSYS::Nexus::GLTFWriter::Node::CreateLight](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_node.xhtml#a7883624afdcaae45b6018944a040a01c) static Node * CreateLight(GLTF *gltf) [ANSYS::Nexus::GLTFWriter::Node::CreateCamera](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_node.xhtml#af6c4767cc8271d9d39816d278538197a) static Node * CreateCamera(GLTF *gltf, Camera *camera, const char *name=0, const double *matrix=0) [ANSYS::Nexus::GLTFWriter::Scene::Create](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_scene.xhtml#aac8bcb85d4361abba99053b3c56eb08b) static Scene * Create(GLTF *gltf, const char *name=0, const char *units=0, float scale=1, Scene::BackgroundType backgroundType=Scene::BT_NONE, float r1=0, float g1=0, float b1=0, float r2=0, float g2=0, float b2=0) [ANSYS::Nexus::GLTFWriter::Scene::BT\_SOLID](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_scene.xhtml#ac17baf491cdba3613b0aa39719a3dbd8aeea551002921bb989b3ed35678ec982b) @ BT_SOLID Make solid color from color 1. **Definition:** [GLTFScene.h:35](_g_l_t_f_scene_8h_source.xhtml#l00035) [ANSYS::Nexus::GLTFWriter::Texture::Create](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_texture.xhtml#a3d15e0e6ad83cd7d50bb81ce2d0f30c8) static Texture * Create(GLTF *gltf, TextureFormat format, TextureTarget target, Sampler *sampler, Image *image) [ANSYS::Nexus::GLTFWriter::Texture::TF\_RGB](class_a_n_s_y_s_1_1_nexus_1_1_g_l_t_f_writer_1_1_texture.xhtml#aba6db4f52b9f0a1a866bce302b6d8964aaa8ea9a0e6b83932a6a882b1655e8e59) @ TF_RGB 3 unsigned chars per pixel. **Definition:** [GLTFTexture.h:34](_g_l_t_f_texture_8h_source.xhtml#l00034)