Basic fps camera

Camera.cpp

@@ -38,17 +38,38 @@ void Camera::lookForward() {
     viewMatrix = glm::lookAt(position, position + frontVec, upVec);
 }
 
-void Camera::updatePositionFromKeyboardInput(bool *actionCameraRegister) {
+void Camera::updatePositionFromKeyboardInput(bool *actionCameraRegister, float deltaTime) {
+    glm::vec3 frontVecWithoutY = glm::vec3(frontVec.x, 0.0f, frontVec.z);
+
+    glm::vec3 deltaPos = glm::vec3(0.0f, 0.0f, 0.0f);
+
     if(actionCameraRegister[cameraForward])
-        position += speed * frontVec;
+        deltaPos += speed * deltaTime * frontVecWithoutY;
     if(actionCameraRegister[cameraBackward])
-        position -= speed * frontVec;
+        deltaPos -= speed * deltaTime * frontVecWithoutY;
     if(actionCameraRegister[cameraLeft])
-        position -= speed * glm::cross(frontVec, upVec);
+        deltaPos -= speed * deltaTime * glm::cross(frontVec, upVec);
     if(actionCameraRegister[cameraRight])
-        position += speed * glm::cross(frontVec, upVec);
+        deltaPos += speed * deltaTime * glm::cross(frontVec, upVec);
     if(actionCameraRegister[cameraUp])
-        position += speed * upVec;
+        deltaPos += speed * deltaTime * upVec;
     if(actionCameraRegister[cameraDown])
-        position -= speed * upVec;
+        deltaPos -= speed * deltaTime * upVec;
+
+    position += deltaPos;
+}
+
+void Camera::updateDirectionFromMouseInput(float deltaCursorX, float deltaCursorY) {
+    yaw += deltaCursorX;
+    pitch += deltaCursorY;
+    
+    if(pitch > 89.0f)
+        pitch =  89.0f;
+    if(pitch < -89.0f)
+        pitch = -89.0f;
+
+    direction.x = cos(glm::radians(yaw)) * cos(glm::radians(pitch));
+    direction.y = sin(glm::radians(pitch));
+    direction.z = sin(glm::radians(yaw)) * cos(glm::radians(pitch));
+    frontVec = glm::normalize(direction);
 }

Camera.h

@@ -12,7 +12,8 @@ public:
     glm::mat4 getViewProj();
     void updateVPM();
     void updateAspectRatio(int width, int height);
-    void updatePositionFromKeyboardInput(bool *actionCameraRegister);
+    void updatePositionFromKeyboardInput(bool *actionCameraRegister, float deltaTime);
+    void updateDirectionFromMouseInput(float deltaCursorX, float deltaCursorY);
 
     void translate(glm::vec3 translateVector);
 
@@ -33,7 +34,10 @@ private:
     glm::vec3 frontVec = glm::vec3(0.0f, 0.0f, -1.0f);
     glm::vec3 upVec = glm::vec3(0.0f, 1.0f,  0.0f);
 
-    float speed = 0.05f;
+    float pitch;
+    float yaw = -90.0f;
+
+    float speed = 2.0f;
 
     float fov;
 

Controller.cpp

@@ -91,7 +91,7 @@ void Controller::run() {
 
         // Update game
         // ...
-        model = glm::rotate(model, (float)(this->deltaTime*0.05), glm::vec3(0.0f, 1.0f, 0.0f));
+        model = glm::rotate(model, (float)(this->deltaTime*0.0005), glm::vec3(0.0f, 1.0f, 0.0f));
 
         cam1.lookAtTarget(glm::vec3(0.0f, 0.0f, 0.0f));
         cam1.lookForward();
@@ -119,14 +119,18 @@ void Controller::run() {
 
         // Check events, handle input
         gameEventHandler->handleEvents();
-        cam1.updatePositionFromKeyboardInput(gameEventHandler->getCameraActionRegister());
+        cam1.updatePositionFromKeyboardInput(gameEventHandler->getCameraActionRegister(), deltaTime);
+        cam1.updateDirectionFromMouseInput(gameEventHandler->getCursorDeltaX(), gameEventHandler->getCursorDeltaY());
 
         // Update window size
-        int new_window_width, new_window_height;
-        glfwGetFramebufferSize(gameWindow->getGLFWwindow(), &new_window_width, &new_window_height);
-        gameWindow->setWindowDimensions(new_window_width, new_window_height);
-        glViewport(0, 0, new_window_width, new_window_height);
-        cam1.updateAspectRatio(new_window_width, new_window_height);
+        if(gameWindow->getWindowWasResized()) {
+            int new_window_width, new_window_height;
+            glfwGetFramebufferSize(gameWindow->getGLFWwindow(), &new_window_width, &new_window_height);
+            gameWindow->setWindowDimensions(new_window_width, new_window_height);
+            glViewport(0, 0, new_window_width, new_window_height);
+            cam1.updateAspectRatio(new_window_width, new_window_height);
+            gameEventHandler->setFirstMouseInput(1);
+        }
     }
 
 }

EventHandler.cpp

@@ -2,19 +2,28 @@
 
 bool EventHandler::wireFrameMode = 0;
 
-EventHandler::EventHandler(GLFWwindow *p_window)
-    : window(p_window) {
+EventHandler::EventHandler(GLFWwindow *window)
+    : window(window) {
 
     glfwSetKeyCallback(window, key_callback);
 
+    // Currently disabled because callbacks are shitty
+    //glfwSetCursorPosCallback(window, mouse_callback);
+
 }
 
 void EventHandler::handleEvents() {
+
+    // Restore deltaCursorPos BEFORE polling events
+    //deltaCursorPosX = 0.0f; deltaCursorPosY = 0.0f;
+
     glfwPollEvents();
     for(int i=0; i<CAMERA_ACTION_NUM_ITEMS; i++) {
         actionCameraRegister[i] = 0;
     }
 
+    updateMouseDelta();
+
     if(glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS)
         glfwSetWindowShouldClose(window, true);
 
@@ -33,9 +42,9 @@ void EventHandler::handleEvents() {
 
 }
 
-void EventHandler::key_callback(GLFWwindow *p_window, int key, int scancode, int action, int mods) {
+void EventHandler::key_callback(GLFWwindow *window, int key, int scancode, int action, int mods) {
     // Silence warnings of unused variables.
-    (void)p_window; (void)scancode; (void)mods;
+    (void)window; (void)scancode; (void)mods;
 
     if (key == GLFW_KEY_O && action == GLFW_PRESS) {
         wireFrameMode = !wireFrameMode;
@@ -46,3 +55,42 @@ void EventHandler::key_callback(GLFWwindow *p_window, int key, int scancode, int
         }
     }
 }
+
+void EventHandler::updateMouseDelta() {
+    double xPos, yPos;
+    glfwGetCursorPos(window, &xPos, &yPos);
+
+    if(firstMouseInput) {
+        firstMouseInput = 0;
+        lastCursorPosX = xPos;
+        lastCursorPosY = yPos;
+    }
+
+    deltaCursorPosX = xPos - lastCursorPosX;
+    deltaCursorPosY = -(yPos - lastCursorPosY);
+    lastCursorPosX = xPos;
+    lastCursorPosY = yPos;
+
+    deltaCursorPosX *= mouseSensitivity;
+    deltaCursorPosY *= mouseSensitivity;
+
+}
+
+/*void EventHandler::mouse_callback(GLFWwindow* window, double xpos, double ypos) {
+    // Silence warnings of unused variables.
+    (void)window;
+
+    if(firstMouseInput) {
+        firstMouseInput = 0;
+        lastCursorPosX = xpos;
+        lastCursorPosY = ypos;
+    }
+
+    deltaCursorPosX = xpos - lastCursorPosX;
+    deltaCursorPosY = lastCursorPosY - ypos;
+    lastCursorPosX = xpos;
+    lastCursorPosY = ypos;
+
+    deltaCursorPosX *= mouseSensitivity;
+    deltaCursorPosY *= mouseSensitivity;
+}*/

EventHandler.h

@@ -14,10 +14,17 @@ public:
     void handleEvents();
 
     bool * getCameraActionRegister() { return actionCameraRegister; }
+    float getCursorDeltaX() { return deltaCursorPosX; }
+    float getCursorDeltaY() { return deltaCursorPosY; }
+
+    void setFirstMouseInput(bool val) { firstMouseInput = val; }
 
 private:
 
     static void key_callback(GLFWwindow* window, int key, int scancode, int action, int mods);
+    static void mouse_callback(GLFWwindow* window, double xpos, double ypos);
+
+    void updateMouseDelta();
 
     bool actionCameraRegister[CAMERA_ACTION_NUM_ITEMS] = {0};
 
@@ -25,4 +32,13 @@ private:
 
     static bool wireFrameMode;
 
+    float lastCursorPosX;
+    float lastCursorPosY;
+    float deltaCursorPosX;
+    float deltaCursorPosY;
+
+    float mouseSensitivity = 0.08f;
+
+    bool firstMouseInput = 1;
+
 };

Window.cpp

@@ -2,9 +2,12 @@
 #include <glad/glad.h>
 
 #include "Window.h"
+#include "defines.h"
+
+bool Window::windowWasResized = 0;
 
 Window::Window() {
-    width = 800; height = 600;
+    width = INIT_WINDOW_WIDTH; height = INIT_WINDOW_HEIGHT;
 
     window = glfwCreateWindow(width, height, "Fall-Fever", NULL, NULL);
     if(!window) {
@@ -23,6 +26,9 @@ Window::Window() {
     // Enable z buffer
     glEnable(GL_DEPTH_TEST);
 
+    // Disable mouse cursor
+    glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
+
     #ifdef _DEBUG
     std::cout << "OpenGL version: " << glGetString(GL_VERSION) << std::endl;
 	glEnable(GL_DEBUG_OUTPUT);
@@ -34,7 +40,7 @@ Window::Window() {
 
     // Tell GLFW which function to call when window is resized
     // Currently not used...
-    // glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
+    glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
 
 }
 
@@ -45,6 +51,7 @@ Window::~Window() {
 // This function is called when the window gets resized
 void Window::framebuffer_size_callback(GLFWwindow* window, int width, int height) {
     (void)window;
+    windowWasResized = 1;
     glViewport(0, 0, width, height);
 }  
 

Window.h

@@ -16,10 +16,19 @@ public:
     int getWindowWidth() { return width; }
     int getWindowHeight() { return height; }
 
+    // Beware: side effect!
+    bool getWindowWasResized() {
+        bool temp = windowWasResized;
+        windowWasResized = 0;
+        return temp;
+    }
+
 private:
     static void framebuffer_size_callback(GLFWwindow* window, int width, int height);
     static void openGLDebugCallback(GLenum source, GLenum type, GLuint id, GLenum severity, GLsizei length, const GLchar* message, const void* userParam);
 
+    static bool windowWasResized;
+
     GLFWwindow *window;
 
     int width, height;

defines.h

@@ -1,5 +1,7 @@
  #pragma once
 
+#define INIT_WINDOW_WIDTH 800
+#define INIT_WINDOW_HEIGHT 600 
 struct Vertex {
     // Postition
     float x;