Dodatkowa linia w okręgu.

Question

Witam napisałem funkcję, która rysuje okrąg tylko problem polega na tym, że rysuje się także promień tego okręgu. 

Jak mogę się pozbyć tego efektu ?

int main()
{
	glfwInit();
	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);

	GLFWwindow* window = glfwCreateWindow(800, 600, "Hello Window!", NULL, NULL);
	if (window == NULL)
	{
		std::cout << "Failed to initialize GLFW" << std::endl;
		glfwTerminate();
		return -1;
	}

	glfwMakeContextCurrent(window);

	if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress))
	{
		std::cout << "Failed to initialize GLAD" << std::endl;
		return -1;
	}

	glViewport(0, 0, 800, 600);
	glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
	glfwSetCursorPosCallback(window, mouse_callback);
	glfwSetScrollCallback(window, scroll_callback);

	glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);

	glEnable(GL_DEPTH_TEST);

	std::vector<float> vertices;

	genHollowCircleVertices(vertices, 1.0f, 64);

	Shader shaderProgram("vertexShader.vs", "fragmentShader.fs");

	VAO VAO1;
	VAO1.Bind();
	VBO VBO(&vertices[0], vertices.size() * sizeof(float));
	VAO1.LinkAttrib(VBO, 0, 3, GL_FLOAT, 3 * sizeof(float), (void*)0);

	shaderProgram.use();

	while (!glfwWindowShouldClose(window))
	{
		float currentFrame = glfwGetTime();
		deltaTime = currentFrame - lastFrame;
		lastFrame = currentFrame;

		processInput(window);
		glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

		shaderProgram.use();

		glm::mat4 projection = glm::perspective(glm::radians(camera.Zoom), (float)SCR_WIDTH / (float)SCR_HEIGHT, 0.1f, 100.0f);
		shaderProgram.setMat4("projection", projection);

		glm::mat4 view = camera.GetViewMatrix();
		shaderProgram.setMat4("view", view);

		VAO1.Bind();
		glDrawArrays(GL_LINE_STRIP, 0, vertices.size());

		glfwSwapBuffers(window);
		glfwPollEvents();
	}

	VAO1.Unbind();
	VBO.Unbind();
	VAO1.Delete();
	VBO.Delete();
	shaderProgram.~Shader();
	glfwTerminate();
}

void genHollowCircleVertices(std::vector<float>& vertices, float radius, int n)
{
	int numOfVertices = n + 1;
	const float TWO_PI = 2 * 3.14159;
	float step = TWO_PI / (float)n;;

	for (int i = 0; i < numOfVertices; i++)
	{
		float x = radius * cos(i * step);
		float y = radius * sin(i * step);
		float z = 0.0f;


		vertices.push_back(x);
		vertices.push_back(y);
		vertices.push_back(z);
	}
}