实现任意曲线围成封闭图形的渲染

ArchitectureColoredPainting/Model.cpp

@@ -140,13 +140,31 @@ Drawable* Model::processMesh(aiMesh* mesh, const aiScene* scene, aiMatrix4x4 mod
 		}
 
 
-		GLuint bvhChildren[] = {7/*数组长度*/,0/*与显存对齐*/, 
+		GLuint bvhChildren[] = {7/*rootBVH长度*/,0/*与显存对齐*/, 
+			//root
 			1,2, 
 			3,4, 5,6,
-			7,0, 7,30./360* 4294967296 , 8,0, 7,0};
+			7,0, 7,30./360* 4294967296 /*右儿子用来表示旋转角度*/, 8,0, 7,0,
-		QVector4D bvhBound[] = { QVector4D(-1,-1,1,1) ,
+			//elememt0
+			1,2,
+			5+28/*contour索引，由于contour不定长，这里需要给到contour在elementIndex中位置*/,5+12/*style索引，在elementData中位置*/, 3,4,
+					   5+36,5+12, 5+32,5+12,
+			//elememt1
+			1+0/*line索引，element中第几条*/,1 + 25
+
+		};
+		QVector4D bvhBound[] = { 
+			//root
+			QVector4D(-1,-1,1,1),
 			QVector4D(-0.9,-0.9,-0.1,0.9),  QVector4D(0.1, -0.9,0.9,0.9), 
-			QVector4D(-0.8,-0.8,-0.2,-0.1),  QVector4D(-0.7,0.2,-0.2,0.7), QVector4D(0.2,-0.8,0.8,-0.1), QVector4D(0.2,0.1,0.8,0.8) };
+			QVector4D(-0.8,-0.8,-0.2,-0.1),  QVector4D(-0.7,0.2,-0.2,0.7), QVector4D(0.2,-0.8,0.8,-0.1), QVector4D(0.2,0.1,0.8,0.8),
+			//elememt0
+			QVector4D(-1,-1,1,1),
+			QVector4D(-1,-0.5,1,1),	QVector4D(-1,-1,1,0.5),
+									QVector4D(-1,-1,1,-0.5), QVector4D(-1,-0.5,1,0.5),
+			//elememt1
+			QVector4D(-1,0,1,1),
+		};
 		glFunc->glGenBuffers(1, &m_mesh->bvhSSBO);
 		glFunc->glBindBuffer(GL_SHADER_STORAGE_BUFFER, m_mesh->bvhSSBO);
 		glFunc->glBufferData(GL_SHADER_STORAGE_BUFFER,sizeof(bvhChildren), bvhChildren, GL_DYNAMIC_DRAW);
@@ -157,9 +175,41 @@ Drawable* Model::processMesh(aiMesh* mesh, const aiScene* scene, aiMatrix4x4 mod
 		glFunc->glBufferData(GL_SHADER_STORAGE_BUFFER, sizeof(bvhBound), bvhBound, GL_DYNAMIC_DRAW);
 		glFunc->glBindBuffer(GL_SHADER_STORAGE_BUFFER, 0);
 
-		GLuint elementIndex[] = { 1/*数组长度*/,
+		GLuint elementOffset[] = {
-			0,0,14,14,14,14,
+			//element0
-			14,14,21,21,21,21
+			7, //elementBvhRoot
+			5, //elementBvhLength
+			0, //pointsOffset
+			0, //linesOffset
+			//element1
+			12, //elementBvhRoot
+			1, //elementBvhLength
+			19, //pointsOffset
+			40, //linesOffset
+		};
+		glFunc->glGenBuffers(1, &m_mesh->elementOffsetSSBO);
+		glFunc->glBindBuffer(GL_SHADER_STORAGE_BUFFER, m_mesh->elementOffsetSSBO);
+		glFunc->glBufferData(GL_SHADER_STORAGE_BUFFER, sizeof(elementOffset), elementOffset, GL_DYNAMIC_DRAW);
+		glFunc->glBindBuffer(GL_SHADER_STORAGE_BUFFER, 0);
+
+		GLuint elementIndex[] = {
+			//element0
+			//lines, 全部当作三阶贝塞尔, 每条线四个点索引
+			4,2,2,0,
+			0,0,1,1,
+			1,1,4,4,
+			1,1,5,5,
+			4,4,5,5,
+			1,1,3,3,
+			3,3,5,5,
+			//contours, 第一个元素指明轮廓段数，后面为lines索引
+			3, 0,1,2,
+			3, 2,3,4,
+			3, 3,5,6,
+
+			//element2
+			//lines
+			0,1,2
 		};
 		glFunc->glGenBuffers(1, &m_mesh->elementIndexSSBO);
 		glFunc->glBindBuffer(GL_SHADER_STORAGE_BUFFER, m_mesh->elementIndexSSBO);
@@ -168,12 +218,34 @@ Drawable* Model::processMesh(aiMesh* mesh, const aiScene* scene, aiMatrix4x4 mod
 
 
 		GLfloat elementData[] = {
-			1,0, 0,1, -1,0, 1,
+			//element0
-			-1,0, 0,-1, 1,0, 0,
+			//points
-			1,0, 0,1, -1,0, 2,
+			-1,0.5, -1,-0.5, 0,1, 0,-1, 1,0.5, 1,-0.5,
+			//fillStyle
+			//fill
+			0, 
+			//fillType
+			0, //单色
+			//fillColorMetallicRoughness
+			1,1,0, 0,0.8,
+
+			//element1
+			//points
+			-1,0.5, 0,1, 1,0.5,
+			//strokeStyle
+			//stroke
+			1,
+			//strokeWidth
+			0.02,
+			//strokeEndType
+			0, //圆角
+			//strokeFillType
+			0, //单色
+			//strokeFillColorMetallicRoughness
+			0,1,0, 0,0.8
 		};
-		glFunc->glGenBuffers(1, &m_mesh->elementSSBO);
+		glFunc->glGenBuffers(1, &m_mesh->elementDataSSBO);
-		glFunc->glBindBuffer(GL_SHADER_STORAGE_BUFFER, m_mesh->elementSSBO);
+		glFunc->glBindBuffer(GL_SHADER_STORAGE_BUFFER, m_mesh->elementDataSSBO);
 		glFunc->glBufferData(GL_SHADER_STORAGE_BUFFER, sizeof(elementData), elementData, GL_DYNAMIC_DRAW);
 		glFunc->glBindBuffer(GL_SHADER_STORAGE_BUFFER, 0);
 

ArchitectureColoredPainting/PaintingMesh.cpp

@@ -17,8 +17,9 @@ void PaintingMesh::draw()
 
     glFunc->glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 1, bvhSSBO);
     glFunc->glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 2, bvhBoundSSBO);
-    glFunc->glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 3, elementIndexSSBO);
+    glFunc->glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 3, elementOffsetSSBO);
-    glFunc->glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 4, elementSSBO);
+    glFunc->glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 4, elementIndexSSBO);
+    glFunc->glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 5, elementDataSSBO);
 
     glFunc->glDrawElements(GL_TRIANGLES, indices.size(), GL_UNSIGNED_INT, 0);
     glFunc->glBindBuffer(GL_SHADER_STORAGE_BUFFER, 0);

ArchitectureColoredPainting/PaintingMesh.h

@@ -42,7 +42,7 @@ public:
 	QOpenGLFunctions_4_5_Compatibility* glFunc;               //opengl函数入口
 	QOpenGLShaderProgram* shaderProgram;    //着色器程序
 
-	GLuint bvhSSBO, bvhBoundSSBO, elementIndexSSBO, elementSSBO;
+	GLuint bvhSSBO, bvhBoundSSBO, elementOffsetSSBO, elementIndexSSBO, elementDataSSBO;
 	
 	/*  函数  */
 	PaintingMesh(QOpenGLFunctions_4_5_Compatibility* glFunc, QOpenGLShaderProgram* shaderProgram, aiMatrix4x4 model);

ArchitectureColoredPainting/RendererWidget.cpp

@@ -3,11 +3,13 @@
 #include <string>
 #include <fstream>
 #include <sstream>
+#include <QScreen>
+#include <QGuiApplication>
 
 RendererWidget::RendererWidget(QWidget* parent)
 	: QOpenGLWidget(parent), camera(QVector3D(0.0f, 100.0f, 0.0f))
 {
-	startTimer(1000 / 120);
+	startTimer(1000 / QGuiApplication::primaryScreen()->refreshRate());
 	lastFrame = std::clock();
 	setFocusPolicy(Qt::StrongFocus);
 }
@@ -177,7 +179,7 @@ void RendererWidget::resizeGL(int width, int height)
 void RendererWidget::timerEvent(QTimerEvent* event)
 {
 	clock_t currentFrame = std::clock();
-	deltaTime = (float)(std::clock() - lastFrame) / CLOCKS_PER_SEC;
+	deltaTime = (float)(currentFrame - lastFrame) / CLOCKS_PER_SEC;
 	lastFrame = currentFrame;