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添加项目文件。
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‎Camera.h

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#pragma once
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#include <GL/glew.h>
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#include <glm/glm.hpp>
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#include <glm/gtc/matrix_transform.hpp>
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// Defines several possible options for camera movement. Used as abstraction to stay away from window-system specific input methods
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enum Camera_Movement {
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FORWARD,
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BACKWARD,
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LEFT,
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RIGHT
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};
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// Default camera values
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const GLfloat YAW = 90.0f;
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const GLfloat PITCH = 90.0f;
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const GLfloat SPEED = 3.0f;
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const GLfloat SENSITIVTY = 0.5f;
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const GLfloat ZOOM = 45.0f;
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// An abstract camera class that processes input and calculates the corresponding Eular Angles, Vectors and Matrices for use in OpenGL
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class Camera
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{
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public:
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// Camera Attributes
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glm::vec3 Position;
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glm::vec3 Front;
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glm::vec3 Up;
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glm::vec3 Right;
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glm::vec3 WorldUp;
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// Eular Angles
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GLfloat Yaw;
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GLfloat Pitch;
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// Camera options
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GLfloat MovementSpeed;
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GLfloat MouseSensitivity;
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GLfloat Zoom;
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// Constructor with vectors
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Camera(glm::vec3 position = glm::vec3(0.0f, 0.0f, 0.0f), glm::vec3 up = glm::vec3(0.0f, 1.0f, 0.0f), GLfloat yaw = YAW, GLfloat pitch = PITCH) : Front(glm::vec3(0.0f, 0.0f, -1.0f)), MovementSpeed(SPEED), MouseSensitivity(SENSITIVTY), Zoom(ZOOM)
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{
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this->Position = position;
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this->WorldUp = up;
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this->Yaw = yaw;
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this->Pitch = pitch;
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this->updateCameraVectors();
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}
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// Constructor with scalar values
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Camera(GLfloat posX, GLfloat posY, GLfloat posZ, GLfloat upX, GLfloat upY, GLfloat upZ, GLfloat yaw, GLfloat pitch) : Front(glm::vec3(0.0f, 0.0f, -1.0f)), MovementSpeed(SPEED), MouseSensitivity(SENSITIVTY), Zoom(ZOOM)
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{
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this->Position = glm::vec3(posX, posY, posZ);
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this->WorldUp = glm::vec3(upX, upY, upZ);
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this->Yaw = yaw;
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this->Pitch = pitch;
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this->updateCameraVectors();
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}
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// Returns the view matrix calculated using Eular Angles and the LookAt Matrix
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glm::mat4 GetViewMatrix()
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{
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return glm::lookAt(this->Position, this->Position + this->Front, this->Up);
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}
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// Processes input received from any keyboard-like input system. Accepts input parameter in the form of camera defined ENUM (to abstract it from windowing systems)
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void ProcessKeyboard(Camera_Movement direction, GLfloat deltaTime)
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{
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GLfloat velocity = this->MovementSpeed * deltaTime;
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if (direction == FORWARD)
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this->Position += this->Front * velocity;
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if (direction == BACKWARD)
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this->Position -= this->Front * velocity;
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if (direction == LEFT)
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this->Position -= this->Right * velocity;
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if (direction == RIGHT)
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this->Position += this->Right * velocity;
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}
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// Processes input received from a mouse input system. Expects the offset value in both the x and y direction.
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void ProcessMouseMovement(GLfloat xoffset, GLfloat yoffset, GLboolean constrainPitch = true)
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{
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xoffset *= this->MouseSensitivity;
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yoffset *= this->MouseSensitivity;
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this->Yaw -= xoffset;
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this->Pitch -= yoffset;
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// Make sure that when pitch is out of bounds, screen doesn't get flipped
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if (constrainPitch)
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{
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if (this->Pitch > 179.0f)
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this->Pitch = 179.0f;
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if (this->Pitch < 1.0f)
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this->Pitch = 1.0f;
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}
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cout << "yaw: " << Yaw << ", pitch: " << Pitch << endl;
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// Update Front, Right and Up Vectors using the updated Eular angles
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this->updateCameraVectors();
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}
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// Processes input received from a mouse scroll-wheel event. Only requires input on the vertical wheel-axis
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void ProcessMouseScroll(GLfloat yoffset)
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{
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if (this->Zoom >= 1.0f && this->Zoom <= 45.0f)
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this->Zoom -= yoffset;
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if (this->Zoom <= 1.0f)
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this->Zoom = 1.0f;
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if (this->Zoom >= 45.0f)
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this->Zoom = 45.0f;
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}
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private:
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// Calculates the front vector from the Camera's (updated) Eular Angles
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void updateCameraVectors()
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{
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// Calculate the new Front vector
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glm::vec3 front;
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front.x = -sin(glm::radians(this->Pitch)) * cos(glm::radians(this->Yaw));
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front.y = -cos(glm::radians(this->Pitch));
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front.z = -sin(glm::radians(this->Pitch)) * sin(glm::radians(this->Yaw));
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this->Front = glm::normalize(front);
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// Also re-calculate the Right and Up vector
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this->Right = glm::normalize(glm::cross(this->Front, glm::vec3(0.0f, 1.0f, 0.0f)));
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this->Up = glm::normalize(glm::cross(this->Right, this->Front));
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this->Position = -1.0f*glm::length(Position)*(this->Front);
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//this->Right = glm::normalize(glm::cross(this->Front, this->WorldUp)); // Normalize the vectors, because their length gets closer to 0 the more you look up or down which results in slower movement.
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//this->Up = glm::normalize(glm::cross(this->Right, this->Front));
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}
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};

‎OpenglTest.sln

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Microsoft Visual Studio Solution File, Format Version 12.00
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# Visual Studio 14
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VisualStudioVersion = 14.0.25420.1
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MinimumVisualStudioVersion = 10.0.40219.1
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Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "OpenglTest", "OpenglTest.vcxproj", "{BEE7F980-EA74-44D9-9061-1487BF387CD5}"
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EndProject
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Global
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
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Debug|x64 = Debug|x64
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Debug|x86 = Debug|x86
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Release|x64 = Release|x64
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Release|x86 = Release|x86
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EndGlobalSection
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GlobalSection(ProjectConfigurationPlatforms) = postSolution
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{BEE7F980-EA74-44D9-9061-1487BF387CD5}.Debug|x64.ActiveCfg = Debug|x64
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{BEE7F980-EA74-44D9-9061-1487BF387CD5}.Debug|x64.Build.0 = Debug|x64
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{BEE7F980-EA74-44D9-9061-1487BF387CD5}.Debug|x86.ActiveCfg = Debug|Win32
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{BEE7F980-EA74-44D9-9061-1487BF387CD5}.Debug|x86.Build.0 = Debug|Win32
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{BEE7F980-EA74-44D9-9061-1487BF387CD5}.Release|x64.ActiveCfg = Release|x64
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{BEE7F980-EA74-44D9-9061-1487BF387CD5}.Release|x64.Build.0 = Release|x64
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{BEE7F980-EA74-44D9-9061-1487BF387CD5}.Release|x86.ActiveCfg = Release|Win32
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{BEE7F980-EA74-44D9-9061-1487BF387CD5}.Release|x86.Build.0 = Release|Win32
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EndGlobalSection
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GlobalSection(SolutionProperties) = preSolution
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HideSolutionNode = FALSE
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EndGlobalSection
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EndGlobal

‎OpenglTest.vcxproj

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‎OpenglTest.vcxproj.filters

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‎awesomeface.png

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‎container.jpg

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‎lamp.frag

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#version 330 core
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out vec4 color;
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void main()
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{
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color = vec4(1.0f);
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};

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