Method Init

teapots/textured-teapot/src/main/cpp/TexturedTeapotRender.cpp:53–80

* Init: Initialize the GL with needed data. We add on the things * needed for textures * - load image data into generated glBuffers * - configure samplerObj in fragment shader * @param assetMgr android assetManager from java side */

 * @param assetMgr android assetManager from java side
 */
void TexturedTeapotRender::Init(AAssetManager* assetMgr) {
  // initialize the basic things from TeapotRenderer, no change
  TeapotRenderer::Init();

  // Need flip Y, so as top/bottom image
  std::vector<std::string> textures{
      std::string("Textures/right.tga"),   // GL_TEXTURE_CUBE_MAP_POSITIVE_X
      std::string("Textures/left.tga"),    // GL_TEXTURE_CUBE_MAP_NEGATIVE_X
      std::string("Textures/bottom.tga"),  // GL_TEXTURE_CUBE_MAP_NEGATIVE_Y
      std::string("Textures/top.tga"),     // GL_TEXTURE_CUBE_MAP_POSITIVE_Y
      std::string("Textures/front.tga"),   // GL_TEXTURE_CUBE_MAP_POSITIVE_Z
      std::string("Textures/back.tga")     // GL_TEXTURE_CUBE_MAP_NEGATIVE_Z
  };

  texObj_ = new Texture(textures, assetMgr);
  assert(texObj_);

  std::vector<std::string> samplers;
  std::vector<GLint> units;
  texObj_->GetActiveSamplerInfo(samplers, units);
  for (size_t idx = 0; idx < samplers.size(); idx++) {
    GLint sampler =
        glGetUniformLocation(shader_param_.program_, samplers[idx].c_str());
    glUniform1i(sampler, units[idx]);
  }

  texObj_->Activate();
}

/**
 * Render() function: