1 files changed, 210 insertions, 0 deletions
diff --git a/engine-ocean/Game/Systems/camerasystem.cpp b/engine-ocean/Game/Systems/camerasystem.cpp
new file mode 100644
index 0000000..7951e35
--- /dev/null
+++ b/engine-ocean/Game/Systems/camerasystem.cpp
@@ -0,0 +1,210 @@
+#include "camerasystem.h"
+#include "Game/Components/TransformComponent.h"
+#include "Game/GameWorld.h"
+#include <memory>
+#include <math.h>
+
+
+CameraSystem::CameraSystem(std::map<std::string, std::shared_ptr<GameObject>>& gameobjects,
+                           std::shared_ptr<Camera>& camera,
+                           std::map<int, Input>& input_map):
+    m_gameobjects(gameobjects),
+    m_camera(camera),
+    m_input_map(input_map),
+    first_person(false),
+    third_person(true),
+    m_player(m_gameobjects["player"])
+{
+    camera->setPos(glm::vec3(0.f, 15.f, 0.f));
+    camera->setLook(glm::vec3(-28.6761,5.40863,46.5823));
+
+
+}
+
+glm::vec3 CameraSystem::calculateIdealOffset(glm::vec3 initial){
+    //glm::quat playerRotation = glm::quat(
+//    float y_rotate = m_player->getComponent<TransformComponent>()->getYRotationAngle();
+//    glm::quat playerRot = glm::angleAxis(y_rotate, glm::vec3(0.f, 1.f, 0.f));
+    glm::vec4 idealOffset = glm::vec4(initial, 0.f);
+
+    glm::vec4 rotatedOffset = m_player->getComponent<TransformComponent>()->getMT()->getRotation() * idealOffset * .2f;
+    glm::vec3 rotated = glm::vec3(rotatedOffset) + m_player->getComponent<TransformComponent>()->getPos();
+
+    return rotated;
+}
+
+void CameraSystem::update(double deltaTime){
+    if (m_gameobjects["player"]->getComponent<TransformComponent>()->movingLaterally){
+        glm::vec3 player_pos = m_gameobjects["player"]->getComponent<TransformComponent>()->getPos();
+
+
+        glm::vec4 movement = m_distance*glm::vec4(1.f,0.f,0.f, 0.f);
+        glm::vec4 transl = m_gameobjects["player"]->getComponent<TransformComponent>()->getMT()->getRotation()*movement;
+        transl.y = 0.f;
+
+        glm::vec3 offset = glm::vec3(0.f, 5.f, 0.f);
+        glm::vec3 newPos = player_pos + glm::vec3(transl) + offset;
+
+       // arcballRotation(newPos.x, newPos.z);
+        m_camera->setPos(newPos);
+
+        if (glm::cross(m_camera->getUp(), player_pos) != glm::vec3(0.f)){
+            m_camera->setLook(player_pos);
+        }
+    }
+}
+
+
+void CameraSystem::draw(){
+    Global::graphics.bindShader("phong");
+   Global::graphics.setCameraData(m_camera);
+}
+
+void CameraSystem::firstPersonMode(){
+    first_person = true;
+    third_person = false;
+    m_camera->setPos(m_gameobjects["player"]->getComponent<TransformComponent>()->getPos());
+}
+
+void CameraSystem::thirdPersonMode(glm::vec3 curr_cam_pos){
+    first_person = false;
+    third_person = true;
+    //camera->setPos(curr_cam_pos);
+}
+
+void CameraSystem::scrollEvent(double distance){
+   // calculateZoom(distance);
+//    m_distance += distance;
+//    if (m_distance < 5.f) m_distance = 5.f;
+//    if (m_distance > 40.f) m_distance = 40.f;
+}
+
+void CameraSystem::mousePosEvent(double xpos, double ypos){
+
+    // if right mouse button is pressed, calculate change of the new input x and y pos
+    if (m_input_map[GLFW_MOUSE_BUTTON_LEFT].isHeld){
+        float deltaX = xpos - prev_mouse_pos.x;
+        float deltaY = ypos - prev_mouse_pos.y;
+
+        // upate prev mouse pos
+        prev_mouse_pos = glm::vec2(xpos, ypos);
+
+        arcballRotation(deltaX, deltaY);
+
+    }
+}
+
+void CameraSystem::calculateZoom(float scrollDistance){
+    float zoomLevel = scrollDistance*.1f;
+    m_distanceFromPlayer -= zoomLevel;
+}
+
+void CameraSystem::calculatePitch(double deltaY){
+    if (m_input_map[GLFW_MOUSE_BUTTON_LEFT].isHeld){
+        float pitchChange = deltaY*.1f;
+        m_pitch -= pitchChange;
+    }
+}
+
+void CameraSystem::calculateAngleAroundPlayer(double deltaX){
+    if (m_input_map[GLFW_MOUSE_BUTTON_LEFT].isHeld){
+        float angleChange = deltaX*.3f;
+        m_angleAroundPlayer -= angleChange;
+    }
+}
+
+void CameraSystem::arcballRotation(float deltaX, float deltaY){
+    glm::vec4 cam_pos = glm::vec4(m_camera->getPos(), 1.f);
+    glm::vec4 pivot = glm::vec4(m_player->getComponent<TransformComponent>()->getPos(), 1.f);
+
+    // calculate rotation amount given mouse movement
+    float deltaAngleX = (2*M_PI / static_cast<float>(m_camera->getWidth()));
+    float deltaAngleY = (M_PI / static_cast<float>(m_camera->getHeight()));
+
+    float xAngle = deltaX * deltaAngleX;
+    float yAngle = deltaY * deltaAngleY;
+
+    // handles when camera dir is same as up vector
+    float cosAngle = glm::dot(m_camera->getViewDirection(), m_camera->getUp());
+    float sign = 1.f;
+    if (yAngle < 0) sign = -1.f;
+    if (cosAngle * sign > .99f) yAngle = 0;
+
+    // rotate camera around pivtor point
+    glm::mat4 rotX(1.f);
+    rotX = glm::rotate(rotX, xAngle, m_camera->getUp());
+    cam_pos = (rotX * (cam_pos - pivot)) + pivot;
+
+    glm::mat4 rotY(1.f);
+    rotY = glm::rotate(rotY, yAngle, m_camera->getRight());
+    glm::vec3 final_pos = (rotY * (cam_pos - pivot)) + pivot;
+
+    // update camera view
+    m_camera->setPos(final_pos);
+
+}
+
+void CameraSystem::setCameraPos(){
+//    float horiz_distance = m_distanceFromPlayer*glm::cos(glm::radians(m_pitch));
+//    float vert_distance = m_distanceFromPlayer*glm::sin(glm::radians(m_pitch));
+
+//    glm::vec3 player_pos = m_gameobjects["player"]->getComponent<TransformComponent>()->getPos();
+//    float y_camPos = player_pos.y + vert_distance;
+
+//    float theta = glm::radians(m_angleAroundPlayer);
+//    float offsetX = horiz_distance*glm::cos((theta));
+//    float offsetZ = horiz_distance*glm::sin((theta));
+
+//    glm::vec3 camPos = glm::vec3(player_pos.x - offsetX, y_camPos, player_pos.z - offsetZ);
+
+   // m_yaw = glm::radians(180-theta);
+
+//    glm::vec3 lookVector = camPos +
+//            glm::vec3(glm::cos(pitch)*glm::sin(m_yaw), glm::sin(pitch), glm::cos(pitch)*glm::cos(m_yaw));
+
+
+//    glm::vec4 distanceCamToPlayer = glm::vec4(camPos - player_pos, 0.f);
+//    glm::vec4 look =  m_gameobjects["player"]->getComponent<TransformComponent>()->getMT()->getRotation() * distanceCamToPlayer;
+
+//    //glm::vec3 idealOffset = (glm::vec3(-7.f, 5.f, -10.f)) + m_player->getComponent<TransformComponent>()->getPos();
+//    glm::vec3 idealLookat = calculateIdealOffset(glm::vec3(0.f, -2.f, 40.f));
+
+//    m_currPos = idealOffset;
+//    m_currLook = idealLookat;
+
+//    glm::vec3 direction;
+//    direction.x = cos(glm::radians(m_yaw)) * cos(glm::radians(m_pitch));
+//    direction.y = sin(glm::radians(m_pitch));
+//    direction.z = sin(glm::radians(m_yaw)) * cos(glm::radians(m_pitch));
+
+//    // calculate look
+//    glm::vec4 rotatedPlayerPoint = m_player->getComponent<TransformComponent>()->getMT()->getRotation()* glm::vec4(player_pos, 1.f);
+//    float distanceX = glm::distance(rotatedPlayerPoint.x, player_pos.x);
+//    float distanceY = glm::distance(rotatedPlayerPoint.y, player_pos.y);
+//    float distanceZ = glm::distance(rotatedPlayerPoint.z, player_pos.z);
+
+
+
+    //camPos = camPos + glm::vec3(distanceX, distanceY, distanceZ);
+    //glm::vec3 newLook = camPos - player_pos;
+
+
+
+   // glm::vec4 lookToPlayer = glm::vec4(camPos - player_pos, 0.f);
+   // glm::vec4 rotatedLook = m_player->getComponent<TransformComponent>()->getMT()->getRotation() * lookToPlayer;
+   // float distLookToPlayer = glm::distance(glm::vec3(rotatedLook), player_pos);
+
+
+   // m_camera->setPos(camPos);
+    //m_camera->translate(m_currPos);
+    //m_camera->rotate(m_yaw, glm::vec3(0.f, 1.f, 0.f));
+    //m_camera->setLook(newLook);
+
+
+   // m_camera->setPos(glm::vec3(x_camPos, y_camPos, z_camPos));
+
+
+
+
+}
+