Visual Studio 2019 和 qt 5.15.1 下 opengl 的运用 - Lighting - 03 - Materials
2024-04-15 18:11:29
学习learnopengl文章对应地址:https://learnopengl-cn.github.io/02%20Lighting/03%20Materials/
VS、qt版本分别给了多个文件和一个项目，都在同一个包内：https://download.csdn.net/download/zzjzmdx/18398310
展示图：
Visual Studio 2019
代码如下:
Materials-01.cpp
#include <glad/glad.h>
#include <GLFW/glfw3.h>
#include <iostream>#include <glm/glm.hpp>
#include <glm/gtc/matrix_transform.hpp>
#include <glm/gtc/type_ptr.hpp>#include "shader.h"
#include "camera.h"#define STB_IMAGE_IMPLEMENTATION
#include "stb_image.h"const unsigned int SCR_WIDTH = 800;
const unsigned int SCR_HEIGHT = 600;void framebuffer_size_callback(GLFWwindow* window, int width, int height);
void mouse_callback(GLFWwindow* window, double xpos, double ypos);
void scroll_callback(GLFWwindow* window, double xoffset, double yoffset);
void processInput(GLFWwindow* window);Camera camera(glm::vec3(0.0f, 0.0f, 4.0f));
float lastX = SCR_WIDTH / 2.0f;
float lastY = SCR_HEIGHT / 2.0f;
bool firstMouse = true;float deltaTime = 0.0f;
float lastFrame = 0.0f;glm::vec3 lightPos(0.0f, 0.5f, 2.0f);float vertices[] = {-0.5f, -0.5f, -0.5f, 0.0f, 0.0f, -1.0f,0.5f, -0.5f, -0.5f, 0.0f, 0.0f, -1.0f,0.5f, 0.5f, -0.5f, 0.0f, 0.0f, -1.0f,0.5f, 0.5f, -0.5f, 0.0f, 0.0f, -1.0f,-0.5f, 0.5f, -0.5f, 0.0f, 0.0f, -1.0f,-0.5f, -0.5f, -0.5f, 0.0f, 0.0f, -1.0f,-0.5f, -0.5f, 0.5f, 0.0f, 0.0f, 1.0f,0.5f, -0.5f, 0.5f, 0.0f, 0.0f, 1.0f,0.5f, 0.5f, 0.5f, 0.0f, 0.0f, 1.0f,0.5f, 0.5f, 0.5f, 0.0f, 0.0f, 1.0f,-0.5f, 0.5f, 0.5f, 0.0f, 0.0f, 1.0f,-0.5f, -0.5f, 0.5f, 0.0f, 0.0f, 1.0f,-0.5f, 0.5f, 0.5f, -1.0f, 0.0f, 0.0f,-0.5f, 0.5f, -0.5f, -1.0f, 0.0f, 0.0f,-0.5f, -0.5f, -0.5f, -1.0f, 0.0f, 0.0f,-0.5f, -0.5f, -0.5f, -1.0f, 0.0f, 0.0f,-0.5f, -0.5f, 0.5f, -1.0f, 0.0f, 0.0f,-0.5f, 0.5f, 0.5f, -1.0f, 0.0f, 0.0f,0.5f, 0.5f, 0.5f, 1.0f, 0.0f, 0.0f,0.5f, 0.5f, -0.5f, 1.0f, 0.0f, 0.0f,0.5f, -0.5f, -0.5f, 1.0f, 0.0f, 0.0f,0.5f, -0.5f, -0.5f, 1.0f, 0.0f, 0.0f,0.5f, -0.5f, 0.5f, 1.0f, 0.0f, 0.0f,0.5f, 0.5f, 0.5f, 1.0f, 0.0f, 0.0f,-0.5f, -0.5f, -0.5f, 0.0f, -1.0f, 0.0f,0.5f, -0.5f, -0.5f, 0.0f, -1.0f, 0.0f,0.5f, -0.5f, 0.5f, 0.0f, -1.0f, 0.0f,0.5f, -0.5f, 0.5f, 0.0f, -1.0f, 0.0f,-0.5f, -0.5f, 0.5f, 0.0f, -1.0f, 0.0f,-0.5f, -0.5f, -0.5f, 0.0f, -1.0f, 0.0f,-0.5f, 0.5f, -0.5f, 0.0f, 1.0f, 0.0f,0.5f, 0.5f, -0.5f, 0.0f, 1.0f, 0.0f,0.5f, 0.5f, 0.5f, 0.0f, 1.0f, 0.0f,0.5f, 0.5f, 0.5f, 0.0f, 1.0f, 0.0f,-0.5f, 0.5f, 0.5f, 0.0f, 1.0f, 0.0f,-0.5f, 0.5f, -0.5f, 0.0f, 1.0f, 0.0f
};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(SCR_WIDTH, SCR_HEIGHT, "LearnOpenGL", NULL, NULL);if (window == NULL){std::cout << "Failed to create GLFW window" << std::endl;glfwTerminate();return -1;}glfwMakeContextCurrent(window);glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);glfwSetCursorPosCallback(window, mouse_callback);glfwSetScrollCallback(window, scroll_callback);glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress)){std::cout << "Failed to initialize GLAD" << std::endl;return -1;}glEnable(GL_DEPTH_TEST);Shader lightingShader("./2.3cube.vs", "./2.3cube.fs");Shader lightCubeShader("./2.3light.vs", "./2.3light.fs");unsigned int VBO, cubeVAO;glGenVertexArrays(1, &cubeVAO);glGenBuffers(1, &VBO);glBindBuffer(GL_ARRAY_BUFFER, VBO);glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);glBindVertexArray(cubeVAO);// position attributeglVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(float), (void*)0);glEnableVertexAttribArray(0);// normal attributeglVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(float), (void*)(3 * sizeof(float)));glEnableVertexAttribArray(1);unsigned int lightCubeVAO;glGenVertexArrays(1, &lightCubeVAO);glBindVertexArray(lightCubeVAO);glBindBuffer(GL_ARRAY_BUFFER, VBO);glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(float), (void*)0);glEnableVertexAttribArray(0);while (!glfwWindowShouldClose(window)){float currentFrame = glfwGetTime();deltaTime = currentFrame - lastFrame;lastFrame = currentFrame;processInput(window);glClearColor(0.1f, 0.1f, 0.1f, 1.0f);glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);lightingShader.use();lightingShader.setVec3("light.position", lightPos);lightingShader.setVec3("viewPos", camera.Position);glm::vec3 lightColor;lightColor.x = sin(glfwGetTime() * 2.0f);lightColor.y = sin(glfwGetTime() * 0.7f);lightColor.z = sin(glfwGetTime() * 1.3f);glm::vec3 diffuseColor = lightColor * glm::vec3(0.5f); glm::vec3 ambientColor = diffuseColor * glm::vec3(0.2f);lightingShader.setVec3("light.ambient", ambientColor);lightingShader.setVec3("light.diffuse", diffuseColor);lightingShader.setVec3("light.specular", 1.0f, 1.0f, 1.0f);lightingShader.setVec3("material.ambient", 1.0f, 0.5f, 0.31f);lightingShader.setVec3("material.diffuse", 1.0f, 0.5f, 0.31f);lightingShader.setVec3("material.specular", 0.5f, 0.5f, 0.5f);lightingShader.setFloat("material.shininess", 32.0f);glm::mat4 projection = glm::perspective(glm::radians(camera.Zoom), (float)SCR_WIDTH / (float)SCR_HEIGHT, 0.1f, 100.0f);glm::mat4 view = camera.GetViewMatrix();lightingShader.setMat4("projection", projection);lightingShader.setMat4("view", view);glm::mat4 model = glm::mat4(1.0f);lightingShader.setMat4("model", model);glBindVertexArray(cubeVAO);glDrawArrays(GL_TRIANGLES, 0, 36);lightCubeShader.use();lightCubeShader.setMat4("projection", projection);lightCubeShader.setMat4("view", view);model = glm::mat4(1.0f);model = glm::translate(model, lightPos);model = glm::scale(model, glm::vec3(0.1f));lightCubeShader.setMat4("model", model);glBindVertexArray(lightCubeVAO);glDrawArrays(GL_TRIANGLES, 0, 36);glfwSwapBuffers(window);glfwPollEvents();}glDeleteVertexArrays(1, &cubeVAO);glDeleteVertexArrays(1, &lightCubeVAO);glDeleteBuffers(1, &VBO);glfwTerminate();return 0;
}void processInput(GLFWwindow* window)
{if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS)glfwSetWindowShouldClose(window, true);if (glfwGetKey(window, GLFW_KEY_W) == GLFW_PRESS)camera.ProcessKeyboard(FORWARD, deltaTime);if (glfwGetKey(window, GLFW_KEY_S) == GLFW_PRESS)camera.ProcessKeyboard(BACKWARD, deltaTime);if (glfwGetKey(window, GLFW_KEY_A) == GLFW_PRESS)camera.ProcessKeyboard(LEFT, deltaTime);if (glfwGetKey(window, GLFW_KEY_D) == GLFW_PRESS)camera.ProcessKeyboard(RIGHT, deltaTime);
}void framebuffer_size_callback(GLFWwindow* window, int width, int height)
{glViewport(0, 0, width, height);
}void mouse_callback(GLFWwindow* window, double xpos, double ypos)
{if (firstMouse){lastX = xpos;lastY = ypos;firstMouse = false;}float xoffset = xpos - lastX;float yoffset = lastY - ypos;lastX = xpos;lastY = ypos;camera.ProcessMouseMovement(xoffset, yoffset);
}void scroll_callback(GLFWwindow* window, double xoffset, double yoffset)
{camera.ProcessMouseScroll(yoffset);
}qt 5.15.1
代:码如下
Materials-01.cpp
#include "Materials.h"float vertices[] = {-0.5f, -0.5f, -0.5f, 0.0f, 0.0f, -1.0f,0.5f, -0.5f, -0.5f, 0.0f, 0.0f, -1.0f,0.5f, 0.5f, -0.5f, 0.0f, 0.0f, -1.0f,0.5f, 0.5f, -0.5f, 0.0f, 0.0f, -1.0f,-0.5f, 0.5f, -0.5f, 0.0f, 0.0f, -1.0f,-0.5f, -0.5f, -0.5f, 0.0f, 0.0f, -1.0f,-0.5f, -0.5f, 0.5f, 0.0f, 0.0f, 1.0f,0.5f, -0.5f, 0.5f, 0.0f, 0.0f, 1.0f,0.5f, 0.5f, 0.5f, 0.0f, 0.0f, 1.0f,0.5f, 0.5f, 0.5f, 0.0f, 0.0f, 1.0f,-0.5f, 0.5f, 0.5f, 0.0f, 0.0f, 1.0f,-0.5f, -0.5f, 0.5f, 0.0f, 0.0f, 1.0f,-0.5f, 0.5f, 0.5f, -1.0f, 0.0f, 0.0f,-0.5f, 0.5f, -0.5f, -1.0f, 0.0f, 0.0f,-0.5f, -0.5f, -0.5f, -1.0f, 0.0f, 0.0f,-0.5f, -0.5f, -0.5f, -1.0f, 0.0f, 0.0f,-0.5f, -0.5f, 0.5f, -1.0f, 0.0f, 0.0f,-0.5f, 0.5f, 0.5f, -1.0f, 0.0f, 0.0f,0.5f, 0.5f, 0.5f, 1.0f, 0.0f, 0.0f,0.5f, 0.5f, -0.5f, 1.0f, 0.0f, 0.0f,0.5f, -0.5f, -0.5f, 1.0f, 0.0f, 0.0f,0.5f, -0.5f, -0.5f, 1.0f, 0.0f, 0.0f,0.5f, -0.5f, 0.5f, 1.0f, 0.0f, 0.0f,0.5f, 0.5f, 0.5f, 1.0f, 0.0f, 0.0f,-0.5f, -0.5f, -0.5f, 0.0f, -1.0f, 0.0f,0.5f, -0.5f, -0.5f, 0.0f, -1.0f, 0.0f,0.5f, -0.5f, 0.5f, 0.0f, -1.0f, 0.0f,0.5f, -0.5f, 0.5f, 0.0f, -1.0f, 0.0f,-0.5f, -0.5f, 0.5f, 0.0f, -1.0f, 0.0f,-0.5f, -0.5f, -0.5f, 0.0f, -1.0f, 0.0f,-0.5f, 0.5f, -0.5f, 0.0f, 1.0f, 0.0f,0.5f, 0.5f, -0.5f, 0.0f, 1.0f, 0.0f,0.5f, 0.5f, 0.5f, 0.0f, 1.0f, 0.0f,0.5f, 0.5f, 0.5f, 0.0f, 1.0f, 0.0f,-0.5f, 0.5f, 0.5f, 0.0f, 1.0f, 0.0f,-0.5f, 0.5f, -0.5f, 0.0f, 1.0f, 0.0f
};QVector3D lightPos(0.0f, 0.5f, 2.0f);Materials::Materials(QWidget *parent): QOpenGLWidget(parent)
{
}Materials::~Materials()
{m_cubeVAO->destroy();m_vbo->destroy();m_lightVAO->destroy();
}void Materials::initializeGL()
{initializeOpenGLFunctions();glEnable(GL_DEPTH_TEST);//物体的QOpenGLShaderProgramm_cubeProgram = new QOpenGLShaderProgram();//vertex shader 顶点着色器m_cubeProgram->addShaderFromSourceFile(QOpenGLShader::Vertex, ":/vcube.glsl");//fragment shader 片段着色器m_cubeProgram->addShaderFromSourceFile(QOpenGLShader::Fragment, ":/fcube.glsl");m_cubeProgram->link();m_cubeProgram->bind();//激活Program对象//物体的VAOm_cubeVAO = new QOpenGLVertexArrayObject();m_cubeVAO->create();m_cubeVAO->bind();m_vbo = new QOpenGLBuffer(QOpenGLBuffer::Type::VertexBuffer);m_vbo->create();m_vbo->bind();m_vbo->allocate(vertices, sizeof(vertices));m_vbo->setUsagePattern(QOpenGLBuffer::StreamDraw);GLint cubePos = m_cubeProgram->attributeLocation("cubePos");if(cubePos==-1){return;}m_cubeProgram->setAttributeBuffer(cubePos, GL_FLOAT, 0, 3, 6*sizeof(GLfloat));m_cubeProgram->enableAttributeArray(cubePos);GLint cubeNormal = m_cubeProgram->attributeLocation("cubeNormal");if(cubeNormal==-1){return;}m_cubeProgram->setAttributeBuffer(cubeNormal, GL_FLOAT, 3*sizeof(GLfloat), 3, 6*sizeof(GLfloat));m_cubeProgram->enableAttributeArray(cubeNormal);//物体的QOpenGLShaderProgramm_lightProgram = new QOpenGLShaderProgram();//vertex shader 顶点着色器m_lightProgram->addShaderFromSourceFile(QOpenGLShader::Vertex, ":/vlight.glsl");//fragment shader 片段着色器m_lightProgram->addShaderFromSourceFile(QOpenGLShader::Fragment, ":/flight.glsl");m_lightProgram->link();m_lightProgram->bind();//激活Program对象m_lightVAO = new QOpenGLVertexArrayObject();m_lightVAO->create();m_lightVAO->bind();m_vbo->bind();GLint lightPos = m_lightProgram->attributeLocation("lightPos");if(lightPos==-1){return;}m_lightProgram->setAttributeBuffer(lightPos, GL_FLOAT, 0, 3, 6*sizeof(GLfloat));m_lightProgram->enableAttributeArray(lightPos);m_vbo->release();m_time_c = QTime::currentTime();
}void Materials::paintGL()
{glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);glClearColor(0.2f, 0.3f, 0.3f, 1.0f);QMatrix4x4 projection;projection.perspective(fov, (float)SCR_WIDTH/(float)SCR_HEIGHT, 0.1f, 100.0f);QMatrix4x4 view;m_time = QTime::currentTime();m_deltaTime = m_time.msecsTo(m_lasttime)/1000.0f;m_lasttime = m_time;//一个位置、目标和上向量view.lookAt(cameraPos, cameraPos + cameraFront, cameraUp);QMatrix4x4 model;float timeValue = m_time_c.msecsTo(QTime::currentTime())/2000.0f;if(m_cubeProgram->isLinked()){m_cubeProgram->bind();m_cubeProgram->setUniformValue("light.position", lightPos);m_cubeProgram->setUniformValue("viewPos", cameraPos);QVector3D lightColor(1.0f, 2.0f, 3.0f);lightColor.setX(sin(timeValue * 2.0f));lightColor.setY(sin(timeValue * 0.7f));lightColor.setZ(sin(timeValue * 1.3f));QVector3D diffuseColor = lightColor * QVector3D(0.5f,0.5f,0.5f);QVector3D ambientColor = diffuseColor * QVector3D(0.2f,0.2f,0.2f);m_cubeProgram->setUniformValue("light.ambient", ambientColor);m_cubeProgram->setUniformValue("light.diffuse", diffuseColor);m_cubeProgram->setUniformValue("light.specular", 1.0f, 1.0f, 1.0f);m_cubeProgram->setUniformValue("material.ambient", 1.0f, 0.5f, 0.31f);m_cubeProgram->setUniformValue("material.diffuse", 1.0f, 0.5f, 0.31f);m_cubeProgram->setUniformValue("material.specular", 0.5f, 0.5f, 0.5f);m_cubeProgram->setUniformValue("material.shininess", 32.0f);m_cubeProgram->setUniformValue("cubemodel", model);m_cubeProgram->setUniformValue("cubeview", view);m_cubeProgram->setUniformValue("cubeprojection", projection);}m_cubeVAO->bind();glDrawArrays(GL_TRIANGLES, 0, 36);m_cubeVAO->release();m_cubeProgram->release();model.translate(lightPos);model.scale(QVector3D(0.2f, 0.2f, 0.2f));if(m_lightProgram->isLinked()){m_lightProgram->bind();m_lightProgram->setUniformValue("lightmodel", model);m_lightProgram->setUniformValue("lightview", view);m_lightProgram->setUniformValue("lightprojection", projection);}m_lightVAO->bind();glDrawArrays(GL_TRIANGLES, 0, 36);m_lightVAO->release();m_lightProgram->release();update();
}void Materials::mouseMoveEvent(QMouseEvent *event)
{int xpos = event->x();int ypos = event->y();if (firstMouse){lastX = xpos;lastY = ypos;firstMouse = false;}float xoffset = xpos - lastX;float yoffset = lastY - ypos;lastX = xpos;lastY = ypos;float sensitivity = 0.1f;xoffset *= sensitivity;yoffset *= sensitivity;yaw += xoffset;pitch += yoffset;if (pitch > 89.0f)pitch = 89.0f;if (pitch < -89.0f)pitch = -89.0f;QVector3D front = QVector3D(0.0f, 0.0f, 3.0f);front.setX(cos(qDegreesToRadians(yaw)) * cos(qDegreesToRadians(pitch)));front.setY(sin(qDegreesToRadians(pitch)));front.setZ(sin(qDegreesToRadians(yaw)) * cos(qDegreesToRadians(pitch)));cameraFront = front;
}void Materials::wheelEvent(QWheelEvent *event){float flagNumber = 1;if(event->angleDelta().y()>0){flagNumber = 1;}else{flagNumber = -1;}fov -= flagNumber;
// if (fov < 1.0f)
// fov = 1.0f;
// if (fov > 45.0f)
// fov = 45.0f;
}void Materials::keyPressEvent(QKeyEvent *event)
{float cameraSpeed = m_deltaTime;if(event->key() == Qt::Key_Escape){close();}if(event->key() == Qt::Key_W){cameraPos += cameraSpeed * cameraFront;}if(event->key() == Qt::Key_S){cameraPos -= cameraSpeed * cameraFront;}if(event->key() == Qt::Key_A){cameraPos -= QVector3D::crossProduct(cameraFront, cameraUp) * cameraSpeed;}if(event->key() == Qt::Key_D){cameraPos += (QVector3D::crossProduct(cameraFront, cameraUp)) * cameraSpeed;}
}void Materials::resizeGL(int w, int h)
{}
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