opengl bloomの描画手順が正しいのか知りたい。

提示コードですがbloom効果を実装したいのですが画面に何も表示されず困っています。bloomの描画手順ですが以下の説明で正しいのでしょうか？

描画手順

1,シーンを描画して一つは普通の描画結果で、二つ目は輝度を取得するカラーバッファを作る
2,bloomブラーを付ける
3,ブラーを付けたカラーバッファを最後に描画するカラーバッファにつける。

参考サイト: https://learnopengl.com/Advanced-Lighting/Bloom

描画ループ

cpp
1// ##################################### 初期化　##################################### 
2FrameWork::Camera::Camera()
3{
4	
5	
6   
7	//カラーバッファ
8	glGenFramebuffers(1, &hdrFBO);
9	glBindFramebuffer(GL_FRAMEBUFFER, hdrFBO);
10	// create 2 floating point color buffers (1 for normal rendering, other for brightness threshold values)
11	glGenTextures(2, colorBuffers);
12	for (unsigned int i = 0; i < 2; i++)
13	{
14		glBindTexture(GL_TEXTURE_2D, colorBuffers[i]);
15		glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA16F, FrameWork::windowContext->getSize().x, FrameWork::windowContext->getSize().y, 0, GL_RGBA, GL_FLOAT, NULL);
16		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
17		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
18		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);  // we clamp to the edge as the blur filter would otherwise sample repeated texture values!
19		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
20		// attach texture to framebuffer
21		glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0 + i, GL_TEXTURE_2D, colorBuffers[i], 0);
22	}
23	
24
25	//描画行列
26	position = glm::vec3(0,0,1);	//座標
27	vecLook = glm::vec3(0,0,-1);	//向き(視線)
28	view = glm::lookAt(glm::vec3(position.x, position.y, position.z), vecLook, glm::vec3(0, 1, 0));	//ビュー行列
29	projection = glm::perspective(glm::radians(90.0f), 4.0f / 3.0f, 0.1f, 10000.0f);			//透視射形行列
30
31
32
33	sprite.InputTexture(FrameWork::LoadTexture("texture/texture_3.png"));
34
35	glGenFramebuffers(2, pingpongFBO);
36	glGenTextures(2, pingpongColorbuffers);
37	for (unsigned int i = 0; i < 2; i++)
38	{
39		glBindFramebuffer(GL_FRAMEBUFFER, pingpongFBO[i]);
40		glBindTexture(GL_TEXTURE_2D, pingpongColorbuffers[i]);
41		glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA16F, FrameWork::windowContext->getSize().x, FrameWork::windowContext->getSize().y, 0, GL_RGBA, GL_FLOAT, NULL);
42		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
43		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
44		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); // we clamp to the edge as the blur filter would otherwise sample repeated texture values!
45		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
46		glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, pingpongColorbuffers[i], 0);
47		// also check if framebuffers are complete (no need for depth buffer)
48		if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
49			std::cout << "Framebuffer not complete!" << std::endl;
50	}
51
52
53}
54
55
56
57void FrameWork::Camera::Renderer()
58{
59	glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
60	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
61
62	glEnable(GL_DEPTH_TEST);				   			//深度バッファを有効
63	glDepthFunc(GL_LEQUAL);								//深度バッファタイプ
64	glEnable(GL_CULL_FACE);					   			//カリングを有効
65	glCullFace(GL_BACK);					   			//裏面を無効
66
67
68	glBindFramebuffer(GL_FRAMEBUFFER, depthMapFBO);
69	glViewport(0, 0, SHADOW_WIDTH, SHADOW_HEIGHT);
70
71	glClear(GL_DEPTH_BUFFER_BIT);
72	
73	//深度バッファレンダリング
74	for(std::vector<std::shared_ptr<Actor>>::iterator itr = actor.begin(); itr != actor.end(); itr++)
75	{	
76		(*itr)->Renderer_DepthOnly(getViewProjection());
77	}
78
79	glBindFramebuffer(GL_FRAMEBUFFER, 0);	
80	
81
82	glViewport(0, 0, FrameWork::windowContext->getSize().x, FrameWork::windowContext->getSize().y);
83	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
84	glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
85	glBindFramebuffer(GL_FRAMEBUFFER, hdrFBO);
86
87	
88//	sprite.Draw_setBloom(getViewProjection_2D(), glm::vec2(0, 0), 0, 0.0f, glm::vec2(1.0f, 1.0f), glm::vec2(0, 0), glm::vec2(100, 100));
89
90	sprite.Draw_Light(getViewProjection(), glm::vec2(0, 0), 0, 0.0f, glm::vec2(1.0f, 1.0f), glm::vec2(0, 0), glm::vec2(100, 100));
91
92	sprite.Draw_setBloom(getViewProjection(), glm::vec2(0, 0), 0, 0.0f, glm::vec2(1.0f, 1.0f), glm::vec2(0, 0), glm::vec2(100, 100));
93
94	glBindFramebuffer(GL_FRAMEBUFFER, 0);
95
96	sprite.Draw_setBlur(quadVAO,quadVBO, colorBuffers[1],pingpongColorbuffers,pingpongFBO);
97
98
99	//ImGui
100	ImGui::Render();
101	ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
102	
103	glBindFramebuffer(GL_READ_FRAMEBUFFER, colorBuffers[0]);
104	glBindFramebuffer(GL_DRAW_FRAMEBUFFER, hdrFBO);
105	glBlitFramebuffer(0, 0, FrameWork::windowContext->getSize().x, FrameWork::windowContext->getSize().y, 0, 0, FrameWork::windowContext->getSize().x, FrameWork::windowContext->getSize().y, GL_COLOR_BUFFER_BIT, GL_NEAREST);
106	glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
107	glClear(GL_COLOR_BUFFER_BIT);
108
109	glDisable(GL_DEPTH_TEST);
110
111	sprite.Draw_Final(colorBuffers[0], pingpongColorbuffers);
112
113	shaderFrameBuffer->setEnable();
114	glBindVertexArray(quadVAO);
115	glBindBuffer(GL_ARRAY_BUFFER, quadVBO);
116	glActiveTexture(GL_TEXTURE0);
117	glBindTexture(GL_TEXTURE_2D, colorBuffers[0]);
118	glDrawArrays(GL_TRIANGLES, 0, 6);
119	shaderFrameBuffer->setDisable();
120
121	glBindVertexArray(0);
122	glBindTexture(GL_TEXTURE_2D,0);
123	glBindFramebuffer(GL_FRAMEBUFFER, 0);
124
125
126	actor.clear();
127	shadowActor.clear();
128
129}
130

Sprite

void FrameWork::D2::Sprite::Draw_setBloom(glm::mat4 projection,glm::vec2 pos, int texNum, float r, glm::vec2 s, glm::vec2 start, glm::vec2 end)
{

	startSize = start; //テクスチャ始点
	endSize = end;	 //テクスチャ終点

	setAttribute();
	setNormal();

	shaderBloom.setEnable();
	glBindVertexArray(vao);
	glBindBuffer(GL_ARRAY_BUFFER, vbo);
	glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof(VertexAttribute) * vertex->size(), vertex->data());

	setNormal();
	setAttribute();
	glBindTexture(GL_TEXTURE_2D, textureID.at(texNum)); //テクスチャバインド
	glActiveTexture(GL_TEXTURE0);		     //テクスチャ有効


	//Transform
	setPosition(pos);				  //座標
	setScale(s + glm::vec2(end - start)); //スケール
	setRotate(r);				  //回転

	shaderBloom.setUniform3f("viewPos", glm::vec3(0, 0, 10));
	shaderBloom.setUniform3f("light.Position", glm::vec3(0, 0, 1.0f));
	shaderBloom.setUniform3f("light.Color",glm::vec3(0,1,0));

	//描画
	shaderBloom.setUniformMatrix4fv("uTranslate", getMatTranslation());
	shaderBloom.setUniformMatrix4fv("uRotate", getMatRotate());
	shaderBloom.setUniformMatrix4fv("uScale", getMatScale());
	shaderBloom.setUniformMatrix4fv("uViewProjection", projection);

	glDrawArrays(GL_TRIANGLES, 0, vertex->size()); //描画


	shaderBloom.setDisable();
	glBindTexture(GL_TEXTURE_2D, 0); //テクスチャバインド
	glBindVertexArray(0);
	glBindBuffer(GL_ARRAY_BUFFER, 0);


}

void FrameWork::D2::Sprite::Draw_Light(glm::mat4 projection, glm::vec2 pos, int texNum, float r, glm::vec2 s, glm::vec2 start, glm::vec2 end)
{
	
	startSize = start; //テクスチャ始点
	endSize = end;	 //テクスチャ終点

	setAttribute();
	setNormal();

	shaderLight.setEnable();
	glBindVertexArray(vao);
	glBindBuffer(GL_ARRAY_BUFFER, vbo);
	glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof(VertexAttribute) * vertex->size(), vertex->data());

	setNormal();
	setAttribute();
	//glBindTexture(GL_TEXTURE_2D, textureID.at(texNum)); //テクスチャバインド
	//glActiveTexture(GL_TEXTURE0);		     //テクスチャ有効


	//Transform
	setPosition(pos);				  //座標
	setScale(s + glm::vec2(end - start)); //スケール
	setRotate(r);				  //回転

	shaderLight.setUniform3f("lightColor", glm::vec3(0, 1, 0));

	//描画
	shaderLight.setUniformMatrix4fv("uTranslate", getMatTranslation());
	shaderLight.setUniformMatrix4fv("uRotate", getMatRotate());
	shaderLight.setUniformMatrix4fv("uScale", getMatScale());
	shaderLight.setUniformMatrix4fv("uViewProjection", projection);

	glDrawArrays(GL_TRIANGLES, 0, vertex->size()); //描画


	shaderLight.setDisable();
	//glBindTexture(GL_TEXTURE_2D, 0); //テクスチャバインド
	glBindVertexArray(0);
	glBindBuffer(GL_ARRAY_BUFFER, 0);
	

}




void FrameWork::D2::Sprite::Draw_setBlur(const GLuint quadVAO, const GLuint quadVBO,const GLint frameBuffer_Luminance, GLuint pingpongColorbuffers[2], GLuint pingpongFBO[2])
{
	horizontal = true;
	bool first_iteration = true;
	unsigned int amount = 10;
	shaderBloomBlur.setEnable();

	for (unsigned int i = 0; i < amount; i++)
	{
		glBindFramebuffer(GL_FRAMEBUFFER, pingpongFBO[horizontal]);
		shaderBloomBlur.setUniform1i("horizontal", horizontal);
		glBindTexture(GL_TEXTURE_2D, first_iteration ? frameBuffer_Luminance : pingpongColorbuffers[!horizontal]);  // bind texture of other framebuffer (or scene if first iteration)
		glActiveTexture(GL_TEXTURE0);		     //テクスチャ有効



		glBindVertexArray(quadVAO);
		glBindBuffer(GL_ARRAY_BUFFER,quadVBO);

		setAttribute();	 //頂点属性　設定

		
		//glDrawArrays(GL_TRIANGLES, 0, vertex->size()); //描画

		glDrawArrays(GL_TRIANGLES, 0, 6);

		//バインド解除
		glBindVertexArray(0);
		glBindBuffer(GL_ARRAY_BUFFER, 0);
		glBindTexture(GL_TEXTURE_2D, 0);


		

		horizontal = !horizontal;
		if (first_iteration)
			first_iteration = false;
	}
	shaderBloomBlur.setDisable();
}

void FrameWork::D2::Sprite::Draw_Final(GLuint frameBuffer, GLuint pingpongColorbuffers[2])
{
	shaderBloomFinal.setEnable();
	glBindVertexArray(vao);
	glBindBuffer(GL_ARRAY_BUFFER, vbo);

	glActiveTexture(GL_TEXTURE0);
	glBindTexture(GL_TEXTURE_2D, frameBuffer);
	glActiveTexture(GL_TEXTURE1);
	glBindTexture(GL_TEXTURE_2D, pingpongColorbuffers[horizontal]);
	shaderBloomFinal.setUniform1i("bloom", true);
	shaderBloomFinal.setUniform1f("exposure", 1.0f);

	glDrawArrays(GL_TRIANGLES, 0, 6);

	glBindVertexArray(0);
	glBindBuffer(GL_ARRAY_BUFFER, 0);

	shaderBloomFinal.setDisable();

}