实现PCF Shadow Map

ArchitectureColoredPainting/ArchitectureColoredPainting.vcxproj

@@ -106,6 +106,8 @@
     <None Include="Shaders\final.vert" />
     <None Include="Shaders\model.frag" />
     <None Include="Shaders\model.vert" />
+    <None Include="Shaders\model_shadow.frag" />
+    <None Include="Shaders\model_shadow.vert" />
     <None Include="Shaders\painting.comp" />
     <None Include="Shaders\painting.frag" />
     <None Include="Shaders\painting.vert" />

ArchitectureColoredPainting/ArchitectureColoredPainting.vcxproj.filters

@@ -98,6 +98,12 @@
     <None Include="Shaders\painting.comp">
       <Filter>Resource Files\Shaders</Filter>
     </None>
+    <None Include="Shaders\model_shadow.frag">
+      <Filter>Resource Files\Shaders</Filter>
+    </None>
+    <None Include="Shaders\model_shadow.vert">
+      <Filter>Resource Files\Shaders</Filter>
+    </None>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="Camera.h">

ArchitectureColoredPainting/Drawable.h

@@ -3,5 +3,6 @@ class Drawable
 {
 public:
     virtual void draw() = 0;
+    virtual void drawShadow() = 0;
 };
 

ArchitectureColoredPainting/MainWindow.qrc

@@ -10,5 +10,7 @@
         <file>Shaders/painting.frag</file>
         <file>Shaders/painting.vert</file>
         <file>Shaders/painting.comp</file>
+        <file>Shaders/model_shadow.frag</file>
+        <file>Shaders/model_shadow.vert</file>
     </qresource>
 </RCC>

ArchitectureColoredPainting/Mesh.cpp

@@ -1,8 +1,9 @@
 #include "Mesh.h"
 
-Mesh::Mesh(QOpenGLFunctions_4_5_Compatibility* glFunc, QOpenGLShaderProgram* shaderProgram, aiMatrix4x4 model)
+Mesh::Mesh(QOpenGLFunctions_4_5_Compatibility* glFunc, QOpenGLShaderProgram* shaderProgram, QOpenGLShaderProgram* shadowProgram, aiMatrix4x4 model)
 	: glFunc(glFunc)
 	, shaderProgram(shaderProgram)
+	, shadowProgram(shadowProgram)
 	, VBO(QOpenGLBuffer::VertexBuffer)
 	, EBO(QOpenGLBuffer::IndexBuffer)
 	, model((float*)&model)
@@ -26,8 +27,6 @@ void Mesh::draw()
 	for (unsigned int i = 0; i < textures.size(); i++)
 	{
 		glFunc->glActiveTexture(GL_TEXTURE0 + i); // 在绑定之前激活相应的纹理单元
-
-
 		textures[i]->texture.bind();
 		//qDebug() << name + number;
 		shaderProgram->setUniformValue(textures[i]->type.toStdString().c_str(), i);
@@ -40,6 +39,30 @@ void Mesh::draw()
 
 	shaderProgram->release();
 }
+void Mesh::drawShadow()
+{
+	shadowProgram->bind();
+
+	unsigned int diffuseNr = 1;
+	unsigned int specularNr = 1;
+	unsigned int normalNr = 1;
+	unsigned int heightNr = 1;
+
+	for (unsigned int i = 0; i < textures.size(); i++)
+	{
+		glFunc->glActiveTexture(GL_TEXTURE0 + i); // 在绑定之前激活相应的纹理单元
+		textures[i]->texture.bind();
+		//qDebug() << name + number;
+		shadowProgram->setUniformValue(textures[i]->type.toStdString().c_str(), i);
+	}
+	// 绘制网格
+
+	QOpenGLVertexArrayObject::Binder bind(&VAO);
+	shadowProgram->setUniformValue("model", model);
+	glFunc->glDrawElements(GL_TRIANGLES, indices.size(), GL_UNSIGNED_INT, 0);
+
+	shadowProgram->release();
+}
 void Mesh::setupMesh()
 {
 	shaderProgram->bind();

ArchitectureColoredPainting/Mesh.h

@@ -45,11 +45,12 @@ public:
 	QVector<Texture*> textures;             //纹理数据
 	QMatrix4x4 model;                       //模型矩阵
 	QOpenGLFunctions_4_5_Compatibility* glFunc;               //opengl函数入口
-    QOpenGLShaderProgram* shaderProgram;    //着色器程序
+	QOpenGLShaderProgram* shaderProgram, * shadowProgram;    //着色器程序
 
 	/*  函数  */
-    Mesh(QOpenGLFunctions_4_5_Compatibility* glFunc, QOpenGLShaderProgram* shaderProgram, aiMatrix4x4 model);
+	Mesh(QOpenGLFunctions_4_5_Compatibility* glFunc, QOpenGLShaderProgram* shaderProgram, QOpenGLShaderProgram* shadowProgram, aiMatrix4x4 model);
 	void draw() override;
+	void drawShadow() override;
 	void setupMesh();
 
 private:

ArchitectureColoredPainting/Model.cpp

@@ -30,11 +30,12 @@ Model::Model(QString path, QOpenGLContext* context, QOpenGLShaderProgram* shader
 	processNode(scene->mRootNode, scene);
 }
 
-Model::Model(QString path, QOpenGLContext* context, QOpenGLShaderProgram* shaderProgram, QOpenGLShaderProgram* paintingProgram, PaintingHelper* paintingHelper)
+Model::Model(QString path, QOpenGLContext* context, QOpenGLShaderProgram* shaderProgram, QOpenGLShaderProgram* paintingProgram, QOpenGLShaderProgram* shadowProgram, PaintingHelper* paintingHelper)
 	: context(context)
 	, glFunc(context->versionFunctions<QOpenGLFunctions_4_5_Compatibility>())
 	, shaderProgram(shaderProgram)
 	, paintingProgram(paintingProgram)
+	, shadowProgram(shadowProgram)
 	, paintingHelper(paintingHelper)
 	, directory(path)
 {
@@ -71,6 +72,13 @@ void Model::draw() {
 	}
 }
 
+void Model::drawShadow() {
+	//shaderProgram->bind();
+	for (Drawable* mesh : meshes) {
+		mesh->drawShadow();
+	}
+}
+
 void Model::destroy()
 {
 	context->doneCurrent();
@@ -109,7 +117,7 @@ Drawable* Model::processMesh(aiMesh* mesh, const aiScene* scene, aiMatrix4x4 mod
 	{
 		qDebug() << str.C_Str() << "Replaced";
 		//  初始化网格
-		PaintingMesh* m_mesh = new PaintingMesh(glFunc, paintingProgram, model);
+		PaintingMesh* m_mesh = new PaintingMesh(glFunc, paintingProgram, shadowProgram, model);
 		// 遍历网格的每个顶点
 		for (unsigned int i = 0; i < mesh->mNumVertices; i++)
 		{
@@ -258,7 +266,7 @@ Drawable* Model::processMesh(aiMesh* mesh, const aiScene* scene, aiMatrix4x4 mod
 	else
 	{
 		//  初始化网格
-		Mesh* m_mesh = new Mesh(glFunc, shaderProgram, model);
+		Mesh* m_mesh = new Mesh(glFunc, shaderProgram, shadowProgram, model);
 		// 遍历网格的每个顶点
 		for (unsigned int i = 0; i < mesh->mNumVertices; i++)
 		{

ArchitectureColoredPainting/Model.h

@@ -9,9 +9,10 @@ class Model
 {
 public:
 	void draw();
+	void drawShadow();
 	void destroy();
 	static Model* createModel(QString path, QOpenGLContext* context, QOpenGLShaderProgram* shaderProgram);
-	Model(QString path, QOpenGLContext* context, QOpenGLShaderProgram* shaderProgram, QOpenGLShaderProgram* paintingProgram, PaintingHelper* paintingHelper);
+	Model(QString path, QOpenGLContext* context, QOpenGLShaderProgram* shaderProgram, QOpenGLShaderProgram* paintingProgram, QOpenGLShaderProgram* shadowProgram, PaintingHelper* paintingHelper);
 private:
 	Model(QString path, QOpenGLContext* context, QOpenGLShaderProgram* shaderProgram);
 
@@ -20,6 +21,7 @@ private:
 	QOpenGLFunctions_4_5_Compatibility* glFunc;
 	QOpenGLShaderProgram* shaderProgram = nullptr;
 	QOpenGLShaderProgram* paintingProgram = nullptr;  //彩绘着色器程序
+	QOpenGLShaderProgram* shadowProgram = nullptr;
 	PaintingHelper* paintingHelper = nullptr;
 
 	/*  模型数据  */

ArchitectureColoredPainting/PaintingMesh.cpp

@@ -1,8 +1,9 @@
 #include "PaintingMesh.h"
 
-PaintingMesh::PaintingMesh(QOpenGLFunctions_4_5_Compatibility* glFunc, QOpenGLShaderProgram* shaderProgram, aiMatrix4x4 model)
+PaintingMesh::PaintingMesh(QOpenGLFunctions_4_5_Compatibility* glFunc, QOpenGLShaderProgram* shaderProgram, QOpenGLShaderProgram* shadowProgram, aiMatrix4x4 model)
     : glFunc(glFunc)
     , shaderProgram(shaderProgram)
+    , shadowProgram(shadowProgram)
     , VBO(QOpenGLBuffer::VertexBuffer)
     , EBO(QOpenGLBuffer::IndexBuffer)
     , model((float*)&model)
@@ -10,14 +11,21 @@ PaintingMesh::PaintingMesh(QOpenGLFunctions_4_5_Compatibility* glFunc, QOpenGLSh
 }
 void PaintingMesh::draw()
 {
-   
     shaderProgram->bind();
     QOpenGLVertexArrayObject::Binder bind(&VAO);
     shaderProgram->setUniformValue("model", model);
     glFunc->glDrawElements(GL_TRIANGLES, indices.size(), GL_UNSIGNED_INT, 0);
-    glFunc->glBindBuffer(GL_SHADER_STORAGE_BUFFER, 0);
+
     shaderProgram->release();
 }
+void PaintingMesh::drawShadow()
+{
+    shadowProgram->bind();
+    QOpenGLVertexArrayObject::Binder bind(&VAO);
+    shadowProgram->setUniformValue("model", model);
+    glFunc->glDrawElements(GL_TRIANGLES, indices.size(), GL_UNSIGNED_INT, 0);
+    shadowProgram->release();
+}
 void PaintingMesh::setupMesh()
 {
     shaderProgram->bind();

ArchitectureColoredPainting/PaintingMesh.h

@@ -32,11 +32,12 @@ public:
 	QVector<unsigned int> indices;          //索引数组
 	QMatrix4x4 model;                       //模型矩阵
 	QOpenGLFunctions_4_5_Compatibility* glFunc;               //opengl函数入口
-	QOpenGLShaderProgram* shaderProgram;    //着色器程序
+	QOpenGLShaderProgram* shaderProgram, * shadowProgram;    //着色器程序
 	GLuint paintingIndex;
 	/*  函数  */
-	PaintingMesh(QOpenGLFunctions_4_5_Compatibility* glFunc, QOpenGLShaderProgram* shaderProgram, aiMatrix4x4 model);
+	PaintingMesh(QOpenGLFunctions_4_5_Compatibility* glFunc, QOpenGLShaderProgram* shaderProgram, QOpenGLShaderProgram* shadowProgram, aiMatrix4x4 model);
 	void draw() override;
+	void drawShadow() override;
 	void setupMesh();
 
 private:

ArchitectureColoredPainting/RendererWidget.cpp

@@ -49,6 +49,14 @@ void RendererWidget::initializeGL()
 	glEnable(GL_DEPTH_TEST);
 	glClearColor(0, 0, 0, 1);
 
+	shadowProgramPtr = new QOpenGLShaderProgram;
+	if (!shadowProgramPtr->addShaderFromSourceFile(QOpenGLShader::Vertex, ":/Shaders/model_shadow.vert"))
+		qDebug() << "ERROR:" << shadowProgramPtr->log();
+	if (!shadowProgramPtr->addShaderFromSourceFile(QOpenGLShader::Fragment, ":/Shaders/model_shadow.frag"))
+		qDebug() << "ERROR:" << shadowProgramPtr->log();
+	if (!shadowProgramPtr->link())
+		qDebug() << "ERROR:" << shadowProgramPtr->log();
+
 	modelProgramPtr = new QOpenGLShaderProgram;
 	if (!modelProgramPtr->addShaderFromSourceFile(QOpenGLShader::Vertex, ":/Shaders/model.vert"))
 		qDebug() << "ERROR:" << modelProgramPtr->log();
@@ -85,13 +93,14 @@ void RendererWidget::initializeGL()
 	finalProgramPtr->setUniformValue("gNormal", 1);
 	finalProgramPtr->setUniformValue("gPosition", 2);
 	finalProgramPtr->setUniformValue("gMetallicRoughness", 3);
+	finalProgramPtr->setUniformValue("gShadowMap", 4);
 	finalProgramPtr->release();
 
 
 
 	paintingHelper = new PaintingHelper(QOpenGLContext::currentContext()->versionFunctions<QOpenGLFunctions_4_5_Compatibility>());
 
-	model = new Model("Models/Sponza/Sponza.gltf", context(), modelProgramPtr, paintingProgramPtr, paintingHelper);
+	model = new Model("Models/Sponza/Sponza.gltf", context(), modelProgramPtr, paintingProgramPtr, shadowProgramPtr, paintingHelper);
 
 
 	paintingHelper->allocateBuffers();
@@ -127,13 +136,37 @@ void RendererWidget::initializeGL()
 
 
 }
-QVector3D lightPositions[] = { QVector3D(0,0,0), QVector3D(100,100,100) ,QVector3D(-100,100,100) ,QVector3D(100,100,-100) };
+QVector3D lightPositions[] = { 2000 * QVector3D(0.2, 4, 1).normalized(), QVector3D(100,100,100) ,QVector3D(-100,100,100) ,QVector3D(100,100,-100) };
-QVector3D lightColors[] = { QVector3D(150000,150000,130000), QVector3D(0,0,0) ,QVector3D(0,0,0) ,QVector3D(0,0,0) };
+QVector3D lightColors[] = { 10000000 * QVector3D(0.7529,0.7450,0.6784).normalized(), QVector3D(0,0,0) ,QVector3D(0,0,0) ,QVector3D(0,0,0) };
+static float sunPitch = 90, sunYaw = 80;
 void RendererWidget::paintGL()
 {
+	QMatrix4x4 lightProjection;
+	lightProjection.ortho(-1200.0f, 1200.0f, -900.0f, 900.0f, 100.f, 5000.0f);
+	
+	lightPositions[0].setX(cos(qDegreesToRadians(sunPitch)) * cos(qDegreesToRadians(sunYaw)));
+	lightPositions[0].setY(sin(qDegreesToRadians(sunPitch)));
+	lightPositions[0].setZ(cos(qDegreesToRadians(sunPitch)) * sin(qDegreesToRadians(sunYaw)));
+	lightPositions[0] *= 2000;
+	QMatrix4x4 lightView;
+	lightView.lookAt(lightPositions[0], QVector3D(0, 0, 0), QVector3D(0, 1, 0));
+	if (shadowFboPtr->bind())
+	{
+		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+		glViewport(0, 0, shadowMapResolution, shadowMapResolution);
+		shadowProgramPtr->bind();
+		shadowProgramPtr->setUniformValue("projection", lightProjection);
+		shadowProgramPtr->setUniformValue("view", lightView);
+		shadowProgramPtr->release();
+
+		model->drawShadow();
+		shadowFboPtr->release();
+	}
+
 	if (fboPtr->bind())
 	{
 		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+		glViewport(0, 0, frameWidth, frameHeight);
 		QMatrix4x4 projection;
 		projection.perspective(camera.Zoom, (float)width() / (float)height(), 10.f, 10000.0f);
 		QMatrix4x4 view = camera.GetViewMatrix();
@@ -156,7 +189,7 @@ void RendererWidget::paintGL()
 	glBindImageTexture(0, gbuffers[0], 0, GL_FALSE, 0, GL_READ_WRITE, GL_RGBA8);
 	glBindImageTexture(1, gbuffers[3], 0, GL_FALSE, 0, GL_READ_WRITE, GL_RG8);
 	glBindImageTexture(2, gbuffers[4], 0, GL_FALSE, 0, GL_READ_WRITE, GL_R16UI);
-	glBindImageTexture(3, gbuffers[5], 0, GL_FALSE, 0, GL_READ_WRITE, GL_RG16F);
+	glBindImageTexture(3, gbuffers[5], 0, GL_FALSE, 0, GL_READ_WRITE, GL_RG32F);
 
 	glDispatchCompute(ceil(frameWidth / 8.), ceil(frameHeight / 8.), 1);
 	//glDispatchCompute(1,1, 1);
@@ -164,11 +197,13 @@ void RendererWidget::paintGL()
 
 	//QOpenGLFramebufferObject::blitFramebuffer(nullptr, QRect(0, 0, 2*width(), 2*height()), fboPtr, QRect(0, 0, 1156, 756));
 	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+	glViewport(0, 0, frameWidth, frameHeight);
 	QOpenGLVertexArrayObject::Binder vaoBinder(&quadVAO);
 	finalProgramPtr->bind();
 
 	finalProgramPtr->setUniformValue("camPos", camera.Position);
-	lightPositions[0] = camera.Position;
+	finalProgramPtr->setUniformValue("lightSpaceMatrix", lightProjection * lightView);
+	//lightPositions[0] = camera.Position;
 	finalProgramPtr->setUniformValueArray("lightPositions", lightPositions, 4);
 	finalProgramPtr->setUniformValueArray("lightColors", lightColors, 4);
 
@@ -181,6 +216,8 @@ void RendererWidget::paintGL()
 	glBindTexture(GL_TEXTURE_2D, gbuffers[2]);
 	glActiveTexture(GL_TEXTURE3);
 	glBindTexture(GL_TEXTURE_2D, gbuffers[3]);
+	glActiveTexture(GL_TEXTURE4);
+	glBindTexture(GL_TEXTURE_2D, shadowGbuffers[3]);
 	glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
 	finalProgramPtr->release();
 }
@@ -192,6 +229,7 @@ void RendererWidget::resizeGL(int width, int height)
 	qDebug() << frameWidth << "x" << frameHeight;
 	//qDebug() << devicePixelRatioF() << width << height;
 	//glViewport(0, 0, (GLint)devicePixelRatio()*width, (GLint)devicePixelRatio()*height);
+
 	if (fboPtr != nullptr)
 		delete fboPtr;
 	fboPtr = new QOpenGLFramebufferObject(frameWidth, frameHeight, QOpenGLFramebufferObject::Depth, GL_TEXTURE_2D);
@@ -203,35 +241,37 @@ void RendererWidget::resizeGL(int width, int height)
 		fboPtr->addColorAttachment(frameWidth, frameHeight, GL_R16F);
 		fboPtr->addColorAttachment(frameWidth, frameHeight, GL_RG16F);*/
 
+		//BaseColor
 		gbuffers[0] = fboPtr->texture();
 
 		glGenTextures(5, gbuffers + 1);
+		//Normal
 		glBindTexture(GL_TEXTURE_2D, gbuffers[1]);
 		glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB16F, frameWidth, frameHeight, 0, GL_RGB, GL_FLOAT, NULL);
 		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 		glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT1, GL_TEXTURE_2D, gbuffers[1], 0);
-	
+		//Position
 		glBindTexture(GL_TEXTURE_2D, gbuffers[2]);
-		glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB16F, frameWidth, frameHeight, 0, GL_RGB, GL_FLOAT, NULL);
+		glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB32F, frameWidth, frameHeight, 0, GL_RGB, GL_FLOAT, NULL);
 		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 		glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT2, GL_TEXTURE_2D, gbuffers[2], 0);
-
+		//MetallicRoughness
 		glBindTexture(GL_TEXTURE_2D, gbuffers[3]);
 		glTexImage2D(GL_TEXTURE_2D, 0, GL_RG8, frameWidth, frameHeight, 0, GL_RG, GL_UNSIGNED_BYTE, NULL);
 		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 		glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT3, GL_TEXTURE_2D, gbuffers[3], 0);
-
+		//gPaintingIndex
 		glBindTexture(GL_TEXTURE_2D, gbuffers[4]);
 		glTexImage2D(GL_TEXTURE_2D, 0, GL_R16UI, frameWidth, frameHeight, 0, GL_RED_INTEGER, GL_UNSIGNED_INT, NULL);
 		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 		glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT4, GL_TEXTURE_2D, gbuffers[4], 0);
-
+		//PaintingTexCoord
 		glBindTexture(GL_TEXTURE_2D, gbuffers[5]);
-		glTexImage2D(GL_TEXTURE_2D, 0, GL_RG16F, frameWidth, frameHeight, 0, GL_RG, GL_FLOAT, NULL);
+		glTexImage2D(GL_TEXTURE_2D, 0, GL_RG32F, frameWidth, frameHeight, 0, GL_RG, GL_FLOAT, NULL);
 		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 		glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT5, GL_TEXTURE_2D, gbuffers[5], 0);
@@ -240,9 +280,53 @@ void RendererWidget::resizeGL(int width, int height)
 		glDrawBuffers(6, attachments);
 		//gbuffers = fboPtr->textures();
 
+		if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
+			qDebug() << "Framebuffer not complete!";
 		fboPtr->release();
 	}
 
+	if (shadowFboPtr != nullptr)
+		delete shadowFboPtr;
+
+	shadowMapResolution = 1 * std::max(frameWidth, frameHeight);
+	shadowFboPtr = new QOpenGLFramebufferObject(shadowMapResolution, shadowMapResolution);
+
+	if (shadowFboPtr->bind())
+	{
+
+		shadowGbuffers[0] = shadowFboPtr->texture();
+
+		glGenTextures(3, shadowGbuffers + 1);
+		//Normal
+		glBindTexture(GL_TEXTURE_2D, shadowGbuffers[1]);
+		glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB16F, shadowMapResolution, shadowMapResolution, 0, GL_RGB, GL_FLOAT, NULL);
+		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+		glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT1, GL_TEXTURE_2D, shadowGbuffers[1], 0);
+		//Position
+		glBindTexture(GL_TEXTURE_2D, shadowGbuffers[2]);
+		glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB16F, shadowMapResolution, shadowMapResolution, 0, GL_RGB, GL_FLOAT, NULL);
+		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+		glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT2, GL_TEXTURE_2D, shadowGbuffers[2], 0);
+		//Depth
+		glBindTexture(GL_TEXTURE_2D, shadowGbuffers[3]);
+		glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT32,
+			shadowMapResolution, shadowMapResolution, 0, GL_DEPTH_COMPONENT, GL_FLOAT, NULL);
+		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
+		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
+		glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, shadowGbuffers[3], 0);
+
+		GLenum attachments[] = { GL_COLOR_ATTACHMENT0, GL_COLOR_ATTACHMENT1, GL_COLOR_ATTACHMENT2 };
+		glDrawBuffers(3, attachments);
+
+		if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
+			qDebug() << "ShadowFramebuffer not complete!";
+		shadowFboPtr->release();
+	}
+
 
 	std::cout << "\033[?25l";
 }
@@ -260,7 +344,7 @@ void RendererWidget::timerEvent(QTimerEvent* event)
 	if (accTime > 1.)
 	{
 		std::cout << "                                                            \r";
-		std::cout << "FPS: " << frameCnt / accTime << "\r";
+		std::cout << "FPS: " << frameCnt / accTime << " " << camera.Position.x() << " " << camera.Position.y() << " " << camera.Position.z() << "\r";
 		accTime = 0;
 		frameCnt = 0;
 	}
@@ -293,6 +377,15 @@ void RendererWidget::timerEvent(QTimerEvent* event)
 	if (pressedKeys.contains(Qt::Key_Space)) {
 		camera.ProcessKeyboard(UP, deltaTime);
 	}
+
+	static int sunSpeed = 10;
+	sunPitch += sunSpeed * deltaTime ;
+	if (sunPitch > 120 || sunPitch < 65)
+	{
+		sunSpeed = -sunSpeed;
+		sunPitch += sunSpeed * deltaTime;
+	}
+		
 	repaint();
 }
 

ArchitectureColoredPainting/RendererWidget.h

@@ -35,12 +35,16 @@ private:
     Camera camera;
     clock_t lastFrame;
     float deltaTime;
+    int shadowMapResolution;
+    QOpenGLShaderProgram* shadowProgramPtr = nullptr;
     QOpenGLShaderProgram* modelProgramPtr = nullptr;
     QOpenGLShaderProgram* paintingProgramPtr = nullptr;
     QOpenGLShaderProgram* paintingCompProgramPtr = nullptr;
     QOpenGLShaderProgram* finalProgramPtr = nullptr;
     QOpenGLFramebufferObject* fboPtr = nullptr;
+    QOpenGLFramebufferObject* shadowFboPtr = nullptr;
     GLuint gbuffers[6];
+    GLuint shadowGbuffers[4];
     QOpenGLBuffer quadVBO;
     QOpenGLVertexArrayObject quadVAO;
     Model* model;

ArchitectureColoredPainting/Shaders/final.frag

@@ -8,10 +8,12 @@ uniform sampler2D gBaseColor;
 uniform sampler2D gNormal;
 uniform sampler2D gPosition;
 uniform sampler2D gMetallicRoughness;
+uniform sampler2D gShadowMap;
 
 // lights
 uniform vec3 lightPositions[4];
 uniform vec3 lightColors[4];
+uniform mat4 lightSpaceMatrix;
 
 uniform vec3 camPos;
 
@@ -56,6 +58,55 @@ vec3 fresnelSchlick(float cosTheta, vec3 F0)
 {
 	return F0 + (1.0 - F0) * pow(1.0 - cosTheta, 5.0);
 }
+
+float Calculate_Avg_Dblockreceiver(vec2 projCoords , int AvgTextureSize)
+{
+    vec2 texelSize =1.0/ textureSize(gShadowMap, 0);
+    float result=0.0f;
+    for(int i=-AvgTextureSize;i<=AvgTextureSize;++i)
+    {
+        for(int j=-AvgTextureSize;j<=AvgTextureSize;j++)
+        {
+            result += texture(gShadowMap, projCoords+vec2(i,j)*texelSize).r; 
+        }
+    }
+    return result/(AvgTextureSize*AvgTextureSize*2*2);
+}
+
+float ShadowCalculation(vec4 fragPosLightSpace, float bias)
+{
+	// 执行透视除法
+	vec3 projCoords = fragPosLightSpace.xyz / fragPosLightSpace.w;
+	// 变换到[0,1]的范围
+	projCoords = projCoords * 0.5 + 0.5;
+	// 取得最近点的深度(使用[0,1]范围下的fragPosLight当坐标)
+	float closestDepth = texture(gShadowMap, projCoords.xy).r; 
+	// 取得当前片段在光源视角下的深度
+	float currentDepth = projCoords.z;
+
+	vec2 texelSize = 1.0 / textureSize(gShadowMap, 0);
+	float shadow = 0;
+
+	// 检查当前片段是否在阴影中
+	//float shadow = 0;// currentDepth - bias > closestDepth  ? 1.0 : 0.0;
+	float fliterArea = 7;
+    int fliterSingleX = int(fliterArea/2);
+	
+	for(int i=-fliterSingleX;i<=fliterSingleX;++i)
+	{
+		for(int j=-fliterSingleX;j<=fliterSingleX;j++)
+		{
+			//  采样周围点在ShadowMap中的深度
+			float closestDepth = texture(gShadowMap, projCoords.xy+vec2(i,j)*texelSize).r; 
+			shadow += (currentDepth - bias) > closestDepth  ? 1.0 : 0.0;
+		}
+	}
+
+	return shadow/(fliterArea*fliterArea);
+	//return clamp(shadow/(fliterArea*fliterArea),0.,1.);
+
+}
+
 void main()
 {       
 	vec3 albedo     = pow(texture(gBaseColor, TexCoords).rgb, vec3(2.2));
@@ -65,6 +116,20 @@ void main()
 	
 	vec3 N = normalize(texture(gNormal, TexCoords).xyz);
 	vec3 WorldPos = texture(gPosition, TexCoords).xyz;
+
+	if(WorldPos==vec3(0))
+	{
+		vec3 color = lightColors[0];
+
+		color = color / (color + vec3(1.0));
+		color = pow(color, vec3(1.0/2.2));  
+
+		FragColor = vec4(color, 1.0);
+		return;
+    }
+
+	vec4 FragPosLightSpace =  lightSpaceMatrix * vec4(WorldPos, 1.0);
+
 	vec3 V = normalize(camPos - WorldPos);
 
 	vec3 F0 = vec3(0.04); 
@@ -72,8 +137,8 @@ void main()
 
 	// reflectance equation
 	vec3 Lo = vec3(0.0);
-    for(int i = 0; i < 1; ++i) 
+
-    {
+	int i = 0;
 	// calculate per-light radiance
 	vec3 L = normalize(lightPositions[i] - WorldPos);
 	vec3 H = normalize(V + L);
@@ -99,15 +164,18 @@ void main()
 	float NdotL = max(dot(N, L), 0.0);                
 	Lo += (kD * albedo / PI + specular) * radiance * NdotL; 
 	
-    }   
-
 	vec3 ambient = vec3(0.03) * albedo;
-    vec3 color = ambient + Lo;
+
+	float bias = 0.08 * max(0.05 * (1.0 - dot(N, L)), 0.005);
+	float shadow = ShadowCalculation(FragPosLightSpace, bias);
+	//vec3 color = ambient + Lo;
+	vec3 color = ambient + (1.0 - shadow) * Lo;
 
 	color = color / (color + vec3(1.0));
 	color = pow(color, vec3(1.0/2.2));  
 
 	FragColor = vec4(color, 1.0);
-    //FragColor = vec4(texture(gPainting, TexCoords).rgb, 1.0);
+	//FragColor = vec4(vec3(shadow), 1);
+	//FragColor = vec4(texture(gShadowMap, TexCoords).rgb, 1.0);
 
 }

ArchitectureColoredPainting/Shaders/model.vert

@@ -19,4 +19,5 @@ void main()
 
     gl_Position =  projection * view * vec4(WorldPos, 1.0);
  
+ 
 }

ArchitectureColoredPainting/Shaders/model_shadow.frag

@@ -0,0 +1,42 @@
+#version 450 core
+
+ 
+uniform sampler2D texture_basecolor;
+uniform sampler2D texture_metallic_roughness;
+uniform sampler2D texture_normal;
+
+layout (location = 0) out vec4 gBaseColor;
+layout (location = 1) out vec3 gNormal;
+layout (location = 2) out vec3 gPosition;
+
+in vec2 TexCoords;
+in vec3 WorldPos;
+in vec3 Normal;
+
+vec3 getNormalFromMap()
+{
+    vec3 tangentNormal = texture(texture_normal, TexCoords).xyz * 2.0 - 1.0;
+
+    vec3 Q1  = dFdx(WorldPos);
+    vec3 Q2  = dFdy(WorldPos);
+    vec2 st1 = dFdx(TexCoords);
+    vec2 st2 = dFdy(TexCoords);
+
+    vec3 N   = normalize(Normal);
+    vec3 T   = normalize(Q1*st2.t - Q2*st1.t);
+    vec3 B   = -normalize(cross(N, T));
+    mat3 TBN = mat3(T, B, N);
+
+    return normalize(TBN * tangentNormal);
+}
+
+void main()
+{      
+    //gBaseColor = vec4(1,0,0,1);
+    gBaseColor = texture(texture_basecolor, TexCoords);
+    if(gBaseColor.a<0.4)
+        discard;
+    gPosition = WorldPos;
+    gNormal = getNormalFromMap();
+
+}

ArchitectureColoredPainting/Shaders/model_shadow.vert

@@ -0,0 +1,21 @@
+#version 450 core
+layout (location = 0) in vec3 aPos;
+layout (location = 1) in vec3 aNormal;
+layout (location = 2) in vec2 aTexCoords;
+ 
+out vec2 TexCoords;
+out vec3 WorldPos;
+out vec3 Normal;
+ 
+uniform mat4 model;
+uniform mat4 view;
+uniform mat4 projection;
+
+void main()
+{
+    TexCoords = aTexCoords;
+    WorldPos = vec3(model * vec4(aPos, 1.0));
+    Normal = mat3(model) * aNormal;   
+
+    gl_Position =  projection * view * vec4(WorldPos, 1.0);
+}

ArchitectureColoredPainting/Shaders/painting.comp

@@ -5,7 +5,7 @@ layout (local_size_x = 8, local_size_y = 8) in;
 layout(rgba8, binding = 0) uniform image2D gBaseColor;
 layout(rg8, binding = 1) uniform image2D gMetallicRoughness;
 layout(r16ui, binding = 2) uniform uimage2D gPaintingIndex;
-layout(rg16f, binding = 3) uniform image2D gPaintingTexCoord;
+layout(rg32f, binding = 3) uniform image2D gPaintingTexCoord;
 
 layout(std430, binding = 1) buffer paintingOffsetBuffer
 {

README.md

@@ -2,7 +2,7 @@
 
 vs2022项目 qt5.15.2 msvc 2019 64-bit
 
-采用pbr材质，现在有一个光源和摄像机绑定，足以分辨出不同材质的效果
+采用pbr材质，现在有一个随时间变化的方向光并添加了阴影
 
 把一块布替换成了（待完成的）彩绘管线，见PaintingMesh类以及painting着色器
 
@@ -13,3 +13,5 @@ TODO：
 - [x] 指定一块材质使用独立管线进行纹理采样
 
 - [ ] 彩绘的表示、读取、采样...
+
+- [x] PCF Shadow Map