问数组的glUniformLocation

EN

uniform mat4 bone_matrices[32];

class Shader
{
...
private:
    GLuint mi_program;
    std::map<std::string, GLint> m_maplocations;
};


void Shader::mapLocations()
{
  GLint numUniforms = 0;
  const GLenum properties[5] = {GL_BLOCK_INDEX, GL_TYPE, GL_NAME_LENGTH, GL_LOCATION, GL_ARRAY_SIZE};
  glGetProgramInterfaceiv(mi_program, GL_UNIFORM, GL_ACTIVE_RESOURCES, &numUniforms);

  for(int unif = 0; unif < numUniforms; ++unif)
    {
      GLint values[5];
      glGetProgramResourceiv(mi_program, GL_UNIFORM, unif, 5, properties, 5, NULL, values);

      // Skip any uniforms that are in a block.
      if(values[0] != -1)
        continue;

      std::string nameData;
      nameData.resize(values[2]);

    if(values[4] > 1)
        {
         // **have an array here**
        }

      glGetProgramResourceName(mi_program, GL_UNIFORM, unif, nameData.size(), NULL, &nameData[0]);
      std::string name(nameData.begin(), nameData.end() - 1);
      m_maplocations.insert(std::pair<std::string, GLint>(name, values[3]));
    }
}