Slight cleanup
Added Camera abstraction
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85733c6053
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118
src/camera.h
Normal file
118
src/camera.h
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@ -0,0 +1,118 @@
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#pragma once
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#include <glad/glad.h>
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#include <glm/glm.hpp>
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#include <glm/gtc/matrix_transform.hpp>
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#include <vector>
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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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const float YAW = -90.0f;
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const float PITCH = 0.0f;
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const float SPEED = 2.5f;
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const float SENSITIVITY = 0.1f;
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const float ZOOM = 45.0f;
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class Camera{
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public:
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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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float Yaw;
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float Pitch;
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float MovementSpeed;
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float MouseSensitivity;
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float Zoom;
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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), float yaw = YAW, float pitch = PITCH) : Front(glm::vec3(0.0f, 0.0f, -1.0f)), MovementSpeed(SPEED), MouseSensitivity(SENSITIVITY), Zoom(ZOOM)
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{
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Position = position;
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WorldUp = up;
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Yaw = yaw;
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Pitch = pitch;
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updateCameraVectors();
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}
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Camera(float posX, float posY, float posZ, float upX, float upY, float upZ, float yaw, float pitch) : Front(glm::vec3(0.0f, 0.0f, -1.0f)), MovementSpeed(SPEED), MouseSensitivity(SENSITIVITY), Zoom(ZOOM)
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{
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Position = glm::vec3(posX, posY, posZ);
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WorldUp = glm::vec3(upX, upY, upZ);
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Yaw = yaw;
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Pitch = pitch;
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updateCameraVectors();
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}
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glm::mat4 GetViewMatrix()
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{
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return glm::lookAt(Position, Position + Front, Up);
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}
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void ProcessKeyboard(Camera_Movement direction, float deltaTime)
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{
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float velocity = MovementSpeed * deltaTime;
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if (direction == FORWARD)
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Position += Front * velocity;
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if (direction == BACKWARD)
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Position -= Front * velocity;
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if (direction == LEFT)
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Position -= Right * velocity;
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if (direction == RIGHT)
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Position += Right * velocity;
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}
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void ProcessMouseMovement(float xoffset, float yoffset, GLboolean constrainPitch = true)
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{
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xoffset *= MouseSensitivity;
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yoffset *= MouseSensitivity;
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Yaw += xoffset;
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Pitch += yoffset;
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if (constrainPitch)
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{
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if (Pitch > 89.0f)
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Pitch = 89.0f;
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if (Pitch < -89.0f)
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Pitch = -89.0f;
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}
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updateCameraVectors();
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}
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void ProcessMouseScroll(float yoffset)
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{
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Zoom -= (float)yoffset;
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if (Zoom < 1.0f)
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Zoom = 1.0f;
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if (Zoom > 45.0f)
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Zoom = 45.0f;
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}
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private:
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void updateCameraVectors()
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{
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glm::vec3 front;
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front.x = cos(glm::radians(Yaw)) * cos(glm::radians(Pitch));
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front.y = sin(glm::radians(Pitch));
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front.z = sin(glm::radians(Yaw)) * cos(glm::radians(Pitch));
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Front = glm::normalize(front);
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Right = glm::normalize(glm::cross(Front, 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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Up = glm::normalize(glm::cross(Right, Front));
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}
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};
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95
src/main.cpp
95
src/main.cpp
@ -11,19 +11,13 @@
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#include "stb_image.h"
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#include "shader.h"
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// stationary camera vectors
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glm::vec3 cameraPos = glm::vec3(0.0f, 0.0f, 3.0f);
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glm::vec3 cameraFront = glm::vec3(0.0f, 0.0f, -1.0f);
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glm::vec3 cameraUp = glm::vec3(0.0f, 1.0f, 0.0f);
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#include "camera.h"
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float deltaTime = 0.0f; // Time between current frame and last frame
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float lastFrame = 0.0f; // Time of last frame
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Camera camera(glm::vec3(0.0f, 0.0f, 3.0f));
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float lastX = 400, lastY = 300;
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float yaw =0 , pitch =0 ;
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float fov = 45;
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bool firstMouse = true;
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void framebuffer_size_callback(GLFWwindow* window, int width, int height) {
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@ -36,14 +30,13 @@ void processInput( GLFWwindow* window){
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const float CameraSpeed = 2.5f * deltaTime;
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if(glfwGetKey(window, GLFW_KEY_W) == GLFW_PRESS)
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cameraPos += CameraSpeed * cameraFront;
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camera.ProcessKeyboard(FORWARD, deltaTime);
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if(glfwGetKey(window, GLFW_KEY_S) == GLFW_PRESS)
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cameraPos -= CameraSpeed * cameraFront;
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camera.ProcessKeyboard(BACKWARD, deltaTime);
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if(glfwGetKey(window, GLFW_KEY_A) == GLFW_PRESS)
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cameraPos -= glm::normalize(glm::cross(cameraFront, cameraUp)) * CameraSpeed;
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camera.ProcessKeyboard(LEFT, deltaTime);
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if(glfwGetKey(window, GLFW_KEY_D) == GLFW_PRESS)
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cameraPos += glm::normalize(glm::cross(cameraFront, cameraUp)) * CameraSpeed;
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camera.ProcessKeyboard(RIGHT,deltaTime);
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}
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@ -56,37 +49,16 @@ void mouse_callback(GLFWwindow* window, double xpos, double ypos){
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}
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float xoffset = xpos - lastX;
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float yoffset = lastY - ypos; // reversed since y-coordinates range from bottom to top
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lastX = xpos;
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lastY = ypos;
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const float sensitivity = 0.1f;
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xoffset *= sensitivity;
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yoffset *= sensitivity;
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yaw += xoffset;
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pitch += yoffset;
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if(pitch > 89.0f)
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pitch = 89.0f;
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if(pitch < -89.0f)
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pitch = -89.0f;
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glm::vec3 direction;
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direction.x = cos(glm::radians(yaw)) * cos(glm::radians(pitch));
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direction.y = sin(glm::radians(pitch));
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direction.z = sin(glm::radians(yaw)) * cos(glm::radians(pitch));
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cameraFront = glm::normalize(direction);
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camera.ProcessMouseMovement(xoffset,yoffset);
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}
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void scroll_callback(GLFWwindow* window, double xoffset, double yoffset)
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{
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fov -= (float)yoffset;
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if (fov < 1.0f)
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fov = 1.0f;
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if (fov > 45.0f)
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fov = 45.0f;
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camera.ProcessMouseScroll(yoffset);
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}
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int main() {
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@ -163,37 +135,6 @@ int main() {
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-0.5f, 0.5f, -0.5f, 0.0f, 1.0f
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};
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/* unsigned int indices[] = {
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0,1,3, // first triangle
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1,2,3 // second triangle
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}; */
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// Vertex buffer objects!!
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/* unsigned int VBO, VAO, EBO;
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glGenVertexArrays(1, &VAO);
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glGenBuffers(1, &VBO);
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glGenBuffers(1, &EBO);
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glBindVertexArray(VAO);
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glBindBuffer(GL_ARRAY_BUFFER, VBO);
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glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
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glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, EBO);
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glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(indices), indices, GL_STATIC_DRAW); */
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/* // Position attribute
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glVertexAttribPointer(0,3, GL_FLOAT, GL_FALSE, 8 * sizeof(float), (void*)0);
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glEnableVertexAttribArray(0);
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// Color attribute
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glVertexAttribPointer(1,3, GL_FLOAT, GL_FALSE, 8 * sizeof(float), (void*)(3* sizeof(float)));
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glEnableVertexAttribArray(1);
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// texture attribute
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glVertexAttribPointer(2,2, GL_FLOAT, GL_FALSE, 8 * sizeof(float), (void*)(6*sizeof(float)));
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glEnableVertexAttribArray(2); */
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unsigned int VBO, VAO;
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glGenVertexArrays(1, &VAO);
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@ -265,12 +206,6 @@ int main() {
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}
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stbi_image_free(data2);
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// WireFrame mode
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// glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
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shader.use();
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@ -323,20 +258,12 @@ int main() {
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glm::mat4 view = glm::mat4(1.0f);
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glm::mat4 projection = glm::mat4(1.0f);
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model = glm::rotate(model, (float)glfwGetTime(), glm::vec3(0.5f, 1.0f, 0.0f));
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// orbiting camera vectors
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const float radius = 10.0f;
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float camX = sin(glfwGetTime()) * radius;
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float camZ = cos(glfwGetTime()) * radius;
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view = glm::lookAt(cameraPos, cameraPos + cameraFront, cameraUp);
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projection = glm::perspective(glm::radians(fov), (float)800 / (float)600, 0.1f, 100.0f);
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// Pass a matrix to the shader
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view = camera.GetViewMatrix();
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shader.setMat4("view", view);
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projection = glm::perspective(glm::radians(camera.Zoom), (float)800 / (float)600, 0.1f, 100.0f);
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shader.setMat4("projection", projection);
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