源码效果
C++源码
纹理图片
需下载stb_image.h这个解码图片的库,该库只有一个头文件。
具体代码:
vertexShader.glsl
#version 330 core
layout(location = 0) in vec3 aPos;
layout(location = 1) in vec2 aUV;
out vec2 outUV;
uniform mat4 _modelMatrix;
uniform mat4 _viewMatrix;
uniform mat4 _projMatrix;
void main()
{
gl_Position = _projMatrix* _viewMatrix * _modelMatrix * vec4(aPos.x, aPos.y, aPos.z, 1.0);
outUV = aUV;
}
vertexShader.glsl
#version 330 core
out vec4 FragColor;
in vec2 outUV;
uniform sampler2D ourTexture;
void main()
{
// 使用图片纹理及色彩混合
FragColor = texture(ourTexture, outUV);
}
OpenGLClass.cpp
#include "OpenGLClass.h"
Camera _camera;
void OpenGLClass::bck_GLFWframebuffersizefun(GLFWwindow* window, int width, int height)
{
// 在窗口中定义一个像素矩形,最终的图形将映射到个矩形中
glViewport(0, 0, width, height);
}
OpenGLClass::OpenGLClass()
{
// 初始化glfw上下文
if (glfwInit() == GLFW_FALSE) { std::cout << "glfwInit fail!\n"; return; }
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3); // 3.3版本
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE); // 使用OpenGL核心模式
// 创建OpenGL窗体
GLFWwindow *window = glfwCreateWindow(windowWidth, windowHeight, "OpenGL Core", nullptr, nullptr);
if (!window) { std::cout << "glfwCreateWindow fail!\n"; return; }
// 当前OpenGL上下文绑定窗口
glfwMakeContextCurrent(window);
// 加载所有OpenGL函数指针
if (GL_FALSE == gladLoadGLLoader((GLADloadproc)glfwGetProcAddress)) { std::cout << "gladLoadGLLoader fail!\n"; return; }
// 在窗口中定义一个像素矩形,最终的图形将映射到个矩形中
glViewport(0, 0, windowWidth, windowHeight);
// 窗口大小调整回调
glfwSetFramebufferSizeCallback(window, OpenGLClass::bck_GLFWframebuffersizefun);
// 摄像机控制
glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED); // 鼠标不可见
glfwSetCursorPosCallback(window, mouse_callback); // 鼠标移动回调
_camera.setSpeed(0.02f);
_camera.lookAt(glm::vec3(0.0f, 0.0f, 3.0f), glm::vec3(0.0f, 0.0f, -1.0f), glm::vec3(0.0f, 1.0f, 0.0f));
// 初始化VAO/VBO
initModel();
// 初始化纹理
if (!initTexture()) { std::cout << "initTexture fail!\n"; system("pause"); return; }
// 初始化shader
if (!initShader("vertexShader.glsl", "fragmentShader.glsl")) { std::cout << "initShader fail!\n"; system("pause"); return; }
// 窗口标志是否是关闭
while (!glfwWindowShouldClose(window))
{
// 输入按键处理
ProcessKeyPInput(window);
#if 0
// 使用红,绿,蓝以及alpha值来清除颜色缓冲区
glClearColor(0.328125f, 0.35156f, 0.82421f, 1.0f);
// 将从窗口中清除最后一次所绘制的图形
/*
GL_COLOR_BUFFER_BIT: 当前可写的颜色缓冲
GL_DEPTH_BUFFER_BIT: 深度缓冲
GL_ACCUM_BUFFER_BIT: 累积缓冲
GL_STENCIL_BUFFER_BIT: 模板缓冲
*/
glClear(GL_COLOR_BUFFER_BIT);
#endif
FlushRender();
// 双缓冲,使用OpenGL或OpenGL ES进行渲染
glfwSwapBuffers(window);
// glfw事件循环
glfwPollEvents();
// 睡眠10ms,防止造成GPU疯狂消耗。实际具体调整
Sleep(10);
}
// 释放窗口
glfwDestroyWindow(window);
// 释放资源,终止GLFW库
glfwTerminate();
}
OpenGLClass::~OpenGLClass()
{
// 释放
if (glIsProgram(shaderProgram)) { glDeleteProgram(shaderProgram); }shaderProgram = 0;
if (glIsBuffer(VAO)) { glDeleteBuffers(1, &VAO); } VAO = 0;
if (glIsBuffer(VBO)) { glDeleteBuffers(1, &VBO); } VBO = 0;
}
void OpenGLClass::ProcessKeyPInput(GLFWwindow *window)
{
if (window)
{
if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS) // 获取窗口按键是否ESC
{
// 设置窗口关闭标志
glfwSetWindowShouldClose(window, true);
}
if (glfwGetKey(window, GLFW_KEY_LEFT_BRACKET) == GLFW_PRESS)
{
_camera.setSpeed(_camera.getSpeed() - 0.005);
std::cout << "已按'[' 减速键:速度-0.005,当前速度为:" << _camera.getSpeed() << std::endl;
}
if (glfwGetKey(window, GLFW_KEY_RIGHT_BRACKET) == GLFW_PRESS)
{
_camera.setSpeed(_camera.getSpeed() + 0.005);
std::cout << "已按']' 增速键:速度+0.005,当前速度为:" << _camera.getSpeed() << std::endl;
}
if (glfwGetKey(window, GLFW_KEY_W) == GLFW_PRESS)
{
_camera.move(CAMERA_MOVE::MOVE_FRONT);
std::cout << "已按'w'键:向(前)运动,速度为:" << _camera.getSpeed() << std::endl;
}
if (glfwGetKey(window, GLFW_KEY_S) == GLFW_PRESS)
{
_camera.move(CAMERA_MOVE::MOVE_BACK);
std::cout << "已按's'键:向(后)运动,速度为:" << _camera.getSpeed() << std::endl;
}
if (glfwGetKey(window, GLFW_KEY_A) == GLFW_PRESS)
{
_camera.move(CAMERA_MOVE::MOVE_LEFT);
std::cout << "已按'a'键:向(左)运动,速度为:" << _camera.getSpeed() << std::endl;
}
if (glfwGetKey(window, GLFW_KEY_D) == GLFW_PRESS)
{
_camera.move(CAMERA_MOVE::MOVE_RIGHT);
std::cout << "已按'd'键:向(右)运动,速度为:" << _camera.getSpeed() << std::endl;
}
if (glfwGetKey(window, GLFW_KEY_UP) == GLFW_PRESS)
{
_camera.move(CAMERA_MOVE::MOVE_UP);
std::cout << "已按'↑'键:向(上)运动,速度为:" << _camera.getSpeed() << std::endl;
}
if (glfwGetKey(window, GLFW_KEY_DOWN) == GLFW_PRESS)
{
_camera.move(CAMERA_MOVE::MOVE_DOWN);
std::cout << "已按'↓'键:向(上)运动,速度为:" << _camera.getSpeed() << std::endl;
}
if (glfwGetKey(window, GLFW_KEY_SPACE) == GLFW_PRESS)
{
_camera.move(CAMERA_MOVE::MOVE_InitialPosition);
std::cout << "********** 已按' ' (空格)恢复初始位置! **********" << std::endl;
}
}
window = nullptr;
}
void OpenGLClass::mouse_callback(GLFWwindow *window, double xpos, double ypos)
{
_camera.onMouseMove(xpos, ypos);
}
void OpenGLClass::setMatrix(const std::string &_name, glm::mat4 _matrix) const
{
// 获得指定shader程序中uniform变量的位置
int shaderNameId = glGetUniformLocation(shaderProgram, _name.c_str());
/*
将4x4的矩阵数据传递给着色器
location:指定要更改的uniform变量的位置。
count:指定要更改的矩阵的数量。如果只更改一个矩阵,该值为1。
transpose:指定是否需要将矩阵进行转置。一般情况下,设为GL_FALSE即可。
value:指向包含矩阵数据的指针。
*/
glUniformMatrix4fv
(
shaderNameId,
1,
GL_FALSE,
glm::value_ptr(_matrix)
);
}
void OpenGLClass::FlushRender()
{
// 判断VAO是否被删除
if (glIsVertexArray(VAO))
{
// 使用红,绿,蓝以及alpha值来清除颜色缓冲区
glClearColor(0.328125f, 0.35156f, 0.82421f, 1.0f);
// 将从窗口中清除最后一次所绘制的图形,GL_DEPTH_BUFFER_BIT将深度信息也清除
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// 开启深度检测
glEnable(GL_DEPTH_TEST);
/// // 模型平移数据
glm::vec3 modelVecs[] =
{
glm::vec3(0.0f,0.0f,0.0f),
glm::vec3(2.0f, 5.0f, -15.0f),
glm::vec3(-1.5f, -2.2f, -2.5f),
glm::vec3(-3.8f, -2.0f, -12.3f),
glm::vec3(2.4f, -0.4f, -3.5f),
glm::vec3(-1.7f, 3.0f, -7.5f),
glm::vec3(1.3f, -2.0f, -2.5f),
glm::vec3(1.5f, 2.0f, -2.5f),
glm::vec3(1.5f, 0.2f, -1.5f),
glm::vec3(-1.3f, 1.0f, -1.5f)
};
///
///
// 观察者/摄像机矩阵
#if 0
glm::mat4 _viewMatrix = glm::lookAt
(
glm::vec3(0.0f, 0.0f, 2.4f), // 摄像机位置
glm::vec3(0.0f, 0.0f, 0.0f), // 摄像机看向的位置
glm::vec3(0.0f, 1.0f, 0.0f) // 摄像机顶部的位置
);
#else
_camera.update();
#endif
// 投影矩阵
glm::mat4 _projMatrix = glm::perspective
(
glm::radians(45.0f),
(float)windowWidth / (float)(windowHeight),
0.1f, 100.0f
);
///
#if 0
// 使用程序
glUseProgram(shaderProgram);
///
setMatrix("_viewMatrix", _viewMatrix);
setMatrix("_projMatrix", _projMatrix);
///
// 绑定纹理
glBindTexture(GL_TEXTURE_2D, _texture);
// 绑定VAO
glBindVertexArray(VAO);
// 绘制三角形
glDrawArrays(GL_TRIANGLES, 0, 36);
// 关闭使用程序
glUseProgram(0);
#else
// 使用程序
glUseProgram(shaderProgram);
// 绘制10个立方体
for (unsigned short index = 0; index < 10; ++index)
{
glm::mat4 _modelMatrix(1.0f);
_modelMatrix = glm::translate(_modelMatrix, modelVecs[index]);
_modelMatrix = glm::rotate(_modelMatrix, glm::radians((float)glfwGetTime()*(index + 1) * 10), glm::vec3(0.5f, 1.0f, 0.0f));
///
setMatrix("_modelMatrix", _modelMatrix);
setMatrix("_viewMatrix", _camera.getMatrix());
setMatrix("_projMatrix", _projMatrix);
///
// 绑定纹理
glBindTexture(GL_TEXTURE_2D, _texture);
// 绑定VAO
glBindVertexArray(VAO);
// 绘制矩形
glDrawArrays(GL_TRIANGLES, 0, 36);
}
// 关闭使用程序
glUseProgram(0);
#endif
}
}
bool OpenGLClass::initTexture()
{
// 读取图片相关信息
ffImage *pImage = ffImage::readFromFile("./rec/wall.jpeg");
if (!pImage) { return false; }
// 生成纹理
glGenTextures(1, &_texture);
// 以2D方式绑定纹理
// 将当前绑定的纹理对象替换为参数中指定的纹理对象
glBindTexture(GL_TEXTURE_2D, _texture);
// 设置纹理属性
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
// 读取图片数据,完成数据绑定
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, pImage->getWidth(), pImage->getHeight(), 0, GL_RGBA, GL_UNSIGNED_BYTE, pImage->getData());
if (pImage) { delete pImage; }pImage = nullptr;
return true;
}
void OpenGLClass::initModel()
{
// 坐标、纹理位置
float vertices[]
{
-0.5f,-0.5f,-0.5f, 0.0f,0.0f,
0.5f,-0.5f,-0.5f, 1.0f,0.0f,
0.5f, 0.5f,-0.5f, 1.0f,1.0f,
0.5f, 0.5f,-0.5f, 1.0f,1.0f,
-0.5f, 0.5f,-0.5f, 0.0f,1.0f,
-0.5f,-0.5f,-0.5f, 0.0f,0.0f,
-0.5f,-0.5f,0.5f, 0.0f,0.0f,
0.5f,-0.5f,0.5f, 1.0f,0.0f,
0.5f, 0.5f,0.5f, 1.0f,1.0f,
0.5f, 0.5f,0.5f, 1.0f,1.0f,
-0.5f, 0.5f,0.5f, 0.0f,1.0f,
-0.5f,-0.5f,0.5f, 0.0f,0.0f,
-0.5f, 0.5f, 0.5f, 1.0f,0.0f,
-0.5f, 0.5f,-0.5f, 1.0f,1.0f,
-0.5f,-0.5f,-0.5f, 0.0f,1.0f,
-0.5f,-0.5f,-0.5f, 0.0f,1.0f,
-0.5f,-0.5f, 0.5f, 0.0f,0.0f,
-0.5f, 0.5f, 0.5f, 1.0f,0.0f,
0.5f, 0.5f, 0.5f, 1.0f,0.0f,
0.5f, 0.5f,-0.5f, 1.0f,1.0f,
0.5f,-0.5f,-0.5f, 0.0f,1.0f,
0.5f,-0.5f,-0.5f, 0.0f,1.0f,
0.5f,-0.5f, 0.5f, 0.0f,0.0f,
0.5f, 0.5f, 0.5f, 1.0f,0.0f,
-0.5f,-0.5f,-0.5f, 0.0f,1.0f,
0.5f,-0.5f,-0.5f, 1.0f,1.0f,
0.5f,-0.5f, 0.5f, 1.0f,0.0f,
0.5f,-0.5f, 0.5f, 1.0f,0.0f,
-0.5f,-0.5f, 0.5f, 0.0f,0.0f,
-0.5f,-0.5f,-0.5f, 0.0f,1.0f,
-0.5f,0.5f,-0.5f, 0.0f,1.0f,
0.5f,0.5f,-0.5f, 1.0f,1.0f,
0.5f,0.5f, 0.5f, 1.0f,0.0f,
0.5f,0.5f, 0.5f, 1.0f,0.0f,
-0.5f,0.5f, 0.5f, 0.0f,0.0f,
-0.5f,0.5f,-0.5f, 0.0f,1.0f
};
/****************************************************/ // VAO
// 创建VAO
glGenVertexArrays(1, &VAO);
// 绑定指定的顶点数组对象(Vertex Array Object, VAO)
glBindVertexArray(VAO);
/****************************************************/
/****************************************************/ // VBO
// 生成缓冲区对象
glGenBuffers(1, &VBO);
// 绑定命名缓冲区对象
glBindBuffer(GL_ARRAY_BUFFER, VBO);
// 缓冲对象(VBO,IBO 等)分配空间并存储数据
glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
/*
指定顶点属性在顶点缓冲对象中的布局,并将其与顶点着色器中的顶点属性进行关联
参数1:第n个layout (对应glsl中顶点着色器的layout)
参数2:顶点属性的组成元素的数量,例如3表示顶点属性是由3个浮点数组成
参数3:顶点属性的数据类型
参数4:是否将非浮点型的数据归一化到[-1, 1]或[0, 1]范围内
参数5:相邻两个顶点属性之间的字节数,通常为0或属性类型大小乘以数量
参数6:顶点属性在顶点缓冲对象中的偏移量或者数据的首地址
*/
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 5 * sizeof(float), (void *)0);
glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 5 * sizeof(float), (void *)(sizeof(float) * 3));
// 激活锚点(参数:第n个layout)
glEnableVertexAttribArray(0);
glEnableVertexAttribArray(1);
// 解绑VAO/VBO
glBindVertexArray(0);
glBindBuffer(GL_ARRAY_BUFFER, 0);
/****************************************************/
}
std::string OpenGLClass::ReadGlslContext(const char *sPath)
{
std::string strContext;
if (!sPath) { return strContext; }
std::ifstream sFile;
sFile.open(sPath);
if (sFile.is_open())
{
std::stringstream sStream;
sStream << sFile.rdbuf();
strContext = sStream.str();
}
return strContext;
}
bool OpenGLClass::initShader(const char *_vertexPath, const char *_fragPath)
{
char infoLog[512] = { 0 };
int successFlag = 0;
/*********************************************************/ // vertex编译
std::string vertexContext = ReadGlslContext(_vertexPath); if (vertexContext.empty()) { return false; }
const char *cVertexContext = vertexContext.c_str();
// 创建顶点着色器对象
unsigned int iVertexID = glCreateShader(GL_VERTEX_SHADER);
// 为顶点着色器指定源码(参数2:传过去几个)
glShaderSource(iVertexID, 1, &cVertexContext, nullptr);
// 编译顶点着色器源码
glCompileShader(iVertexID);
// 查看编译顶点着色器源码结果
glGetShaderiv(iVertexID, GL_COMPILE_STATUS, &successFlag);
if (!successFlag) // 编译失败
{
// 获取编译失败原因
glGetShaderInfoLog(iVertexID, 512, nullptr, infoLog);
std::cout << "glGetShaderiv GL_VERTEX_SHADER" << iVertexID << " fail:" << infoLog << std::endl; return false;
}
cVertexContext = nullptr;
/*********************************************************/
/*********************************************************/ // fragment编译
std::string fragmentContext = ReadGlslContext(_fragPath); if (fragmentContext.empty()) { return false; }
const char *cFragmentContext = fragmentContext.c_str();
// 创建片段着色器对象
unsigned int iFragmentID = glCreateShader(GL_FRAGMENT_SHADER);
// 为片段着色器指定源码(参数2:传过去几个)
glShaderSource(iFragmentID, 1, &cFragmentContext, nullptr);
// 编译片段着色器源码
glCompileShader(iFragmentID);
// 查看编译片段着色器源码结果
glGetShaderiv(iFragmentID, GL_COMPILE_STATUS, &successFlag);
if (!successFlag) // 编译失败
{
// 获取编译失败原因
glGetShaderInfoLog(iFragmentID, 512, nullptr, infoLog);
std::cout << "glGetShaderiv GL_FRAGMENT_SHADER" << iFragmentID << " fail:" << infoLog << std::endl; return false;
}
cFragmentContext = nullptr;
/*********************************************************/
/*********************************************************/ // 链接
// 创建一个空的程序对象
shaderProgram = glCreateProgram();
if (shaderProgram == 0) { std::cout << "glCreateProgram fail!\n"; return false; }
// 将着色器对象附加到程序对象上(注:glDetachShader为移除程序对象中的指定着色器对象)
glAttachShader(shaderProgram, iVertexID);
glAttachShader(shaderProgram, iFragmentID);
// 进行链接程序对象
glLinkProgram(shaderProgram);
// 查看链接状态
glGetProgramiv(shaderProgram, GL_LINK_STATUS, &successFlag);
if (!successFlag) // 链接失败
{
// 获取链接失败原因
glGetProgramInfoLog(shaderProgram, 512, nullptr, infoLog);
std::cout << "glGetProgramiv " << shaderProgram << " fail:" << infoLog << std::endl; return false;
}
/*********************************************************/
/* 在链接完成后,将编译shader相关删除。仅留下链接ID */
if (glIsShader(iVertexID)) { glDeleteShader(iVertexID); }
if (glIsShader(iFragmentID)) { glDeleteShader(iFragmentID); }
return true;
}
OpenGLClass.h
#pragma once
#include "Global.h"
#include "ffImage.h"
#include "Camera.h"
class OpenGLClass
{
public:
OpenGLClass();
~OpenGLClass();
protected:
// 初始化纹理
bool initTexture();
// 初始化模型VAO/VBO
void initModel();
// 初始化shader文件
bool initShader(const char *_vertexPath, const char *_fragPath);
// 读取glsl文件内容
std::string ReadGlslContext(const char *sPath);
// 刷新Render
void FlushRender();
// 回调 - 窗口尺寸变化回调
static void bck_GLFWframebuffersizefun(GLFWwindow* window, int width, int height);
// 处理按键输入
void ProcessKeyPInput(GLFWwindow *window);
// 设置矩阵
void setMatrix(const std::string &_name, glm::mat4 _matrix)const;
// 回调 - 摄像机旋转
static void mouse_callback(GLFWwindow *window, double xpos, double ypos);
private:
unsigned short windowWidth = 800, windowHeight = 600;
unsigned int shaderProgram = 0; // 链接程序对象
unsigned int VBO = 0, VAO = 0, _texture = 0;
};
Camera.cpp
#include "Camera.h"
Camera::Camera()
{
}
Camera::~Camera()
{
}
void Camera::setSpeed(float _spped)
{
if (_spped > 0 && _spped < 0.5)
{
m_speed = _spped;
}
}
float Camera::getSpeed()
{
return m_speed;
}
void Camera::lookAt(glm::vec3 _pos, glm::vec3 _front, glm::vec3 _up)
{
InitialPosition = _pos;
m_position = _pos;
m_front = glm::normalize(_front);
m_up = _up;
m_vMatrix = glm::lookAt(m_position, m_position + m_front, m_up);
}
void Camera::update()
{
m_vMatrix = glm::lookAt(m_position, m_position + m_front, m_up);
}
glm::mat4 Camera::getMatrix()
{
return m_vMatrix;
}
void Camera::move(CAMERA_MOVE _mode)
{
switch (_mode)
{
case CAMERA_MOVE::MOVE_LEFT:
m_position -= glm::normalize(glm::cross(m_front, m_up)) * m_speed;
break;
case CAMERA_MOVE::MOVE_RIGHT:
m_position += glm::normalize(glm::cross(m_front, m_up)) * m_speed;
break;
case CAMERA_MOVE::MOVE_FRONT:
m_position += m_speed * m_front;
break;
case CAMERA_MOVE::MOVE_BACK:
m_position -= m_speed * m_front;
break;
case CAMERA_MOVE::MOVE_UP:
m_position += glm::normalize(glm::cross(glm::vec3(1.0f, 0.0f, 0.0f), m_front))*m_speed;
break;
case CAMERA_MOVE::MOVE_DOWN:
m_position -= glm::normalize(glm::cross(glm::vec3(1.0f, 0.0f, 0.0f), m_front))*m_speed;
break;
case CAMERA_MOVE::MOVE_InitialPosition:
m_position = InitialPosition;
break;
default:
break;
}
}
void Camera::pitch(float _yOffset)
{
m_pitch += _yOffset * m_sensitivity;
// 约定俗成,俯仰角度必须在范围内
m_pitch = m_pitch > 89.0f ? 89.0f : m_pitch;
m_pitch = m_pitch < -89.0f ? -89.0f : m_pitch;
m_front.y = sin(glm::radians(m_pitch));
m_front.x = cos(glm::radians(m_yaw)) * cos(glm::radians(m_pitch));
m_front.z = sin(glm::radians(m_yaw)) * cos(glm::radians(m_pitch));
m_front = glm::normalize(m_front);
update();
}
void Camera::yaw(float _xOffset)
{
m_yaw += _xOffset * m_sensitivity;
m_front.y = sin(glm::radians(m_pitch));
m_front.x = cos(glm::radians(m_yaw)) * cos(glm::radians(m_pitch));
m_front.z = sin(glm::radians(m_yaw)) * cos(glm::radians(m_pitch));
m_front = glm::normalize(m_front);
update();
}
void Camera::setSentitivity(float _m_sensitivity)
{
m_sensitivity = _m_sensitivity;
}
void Camera::onMouseMove(double _xpos, double _ypos)
{
if (m_firstMove)
{
m_xpos = _xpos;
m_ypos = _ypos;
m_firstMove = false;
return;
}
float _xOffset = _xpos - m_xpos;
float _yOffset = -(_ypos - m_ypos);
pitch(_yOffset);
yaw(_xOffset);
m_xpos = _xpos;
m_ypos = _ypos;
}
Camera.h
#pragma once
#include "Global.h"
enum class CAMERA_MOVE
{
MOVE_LEFT,
MOVE_RIGHT,
MOVE_FRONT,
MOVE_BACK,
MOVE_UP,
MOVE_DOWN,
MOVE_InitialPosition
};
class Camera
{
public:
Camera();
~Camera();
void setSpeed(float);
float getSpeed();
void lookAt(glm::vec3 _pos, glm::vec3 _front, glm::vec3 _up);
void update();
glm::mat4 getMatrix();
// 摄像机平移
void move(CAMERA_MOVE);
// 摄像机旋转相关
void pitch(float);
void yaw(float);
void setSentitivity(float);
void onMouseMove(double _xpos, double _ypos);
private:
glm::vec3 m_position = glm::vec3(1.0f), InitialPosition = glm::vec3(1.0f);
glm::vec3 m_front = glm::vec3(1.0f);
glm::vec3 m_up = glm::vec3(1.0f);
float m_speed = 0.01f;
// 旋转模型,达到俯仰效果
float m_pitch = 0.0;
float m_yaw = -90; // 由于初始时看向了z的负方向
float m_sensitivity = 0.05f; // 鼠标位移变化值
float m_xpos = 0.0f, m_ypos = 0.0f; // 鼠标上一次位置
bool m_firstMove = true;
glm::mat4 m_vMatrix = glm::mat4(1.0f);
};
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笔者 - jxd