static GLuint createShader(const std::string &text, GLenum shaderType)
{
	GLuint shader = glCreateShader(shaderType);

	if (shader == 0)
		std::cerr << "Error: Shader creation failed!" << std::endl;

	const GLchar *p[1];
	GLint pLengths[1];

	p[0] = text.c_str();
	pLengths[0] = text.length();

	glShaderSource(shader, 1, p, pLengths);
	glCompileShader(shader);

	checkShaderError(shader, GL_COMPILE_STATUS, false, "Error: Shader compilation failed: ");

	return shader;
}