Quick commit of a broken setup that doesn't work.

27-instancing/src/camera.cpp

@@ -0,0 +1,70 @@
+#include "camera.hpp"
+#include <glm/gtc/matrix_transform.hpp>
+#include <glm/gtc/type_ptr.hpp>
+
+glm::mat4 Camera::look_at() {
+  return glm::lookAt(position, position + front, up);
+}
+
+void Camera::forward() {
+  dirty = true;
+  position += speed * front;
+}
+
+void Camera::back() {
+  dirty = true;
+  position -= speed * front;
+}
+
+void Camera::left() {
+  dirty = true;
+  position -= glm::normalize(glm::cross(front, up)) * speed;
+}
+
+void Camera::right() {
+  dirty = true;
+  position += glm::normalize(glm::cross(front, up)) * speed;
+}
+
+void Camera::update(float deltaTime) {
+  speed = movement_speed * deltaTime;
+}
+
+void Camera::mouse_move(double xpos, double ypos) {
+  dirty = true;
+
+  if(firstMouse) {
+    lastX = xpos;
+    lastY = ypos;
+    firstMouse = false;
+  }
+
+  float xoffset = xpos - lastX;
+  float yoffset = lastY - ypos;
+  lastX = xpos;
+  lastY = ypos;
+
+  const 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;
+
+  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));
+
+  front = glm::normalize(direction);
+}
+
+void Camera::mouse_scroll(double xoffset, double yoffset) {
+  dirty = true;
+  fov -= (float)yoffset;
+
+  if(fov < 1.0f) fov = 1.0f;
+  if(fov > 90.0f) fov = 90.0f;
+}