From 9b5cc10c1a8ae593cd74722c6865be80e713a08e Mon Sep 17 00:00:00 2001
From: Warwick <warwick.l.e.new@gmail.com>
Date: Wed, 12 Jan 2022 15:43:10 +0000
Subject: [PATCH] added glm and template for a player camera

---
 CMakeLists.txt        |  3 +++
 cmake/FindGLM.cmake   | 63 +++++++++++++++++++++++++++++++++++++++++++
 src/PlayerCamera.cpp  | 12 +++++++++
 src/PlayerCamera.h    | 35 ++++++++++++++++++++++++
 src/helpers/RootDir.h |  2 ++
 5 files changed, 115 insertions(+)
 create mode 100644 cmake/FindGLM.cmake
 create mode 100644 src/PlayerCamera.cpp
 create mode 100644 src/PlayerCamera.h
 create mode 100644 src/helpers/RootDir.h

diff --git a/CMakeLists.txt b/CMakeLists.txt
index d8db254..764ade4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -22,6 +22,9 @@ find_package(SDL2_image REQUIRED)
 find_package(OpenGL REQUIRED)
 find_package(GLEW REQUIRED)
 
+find_package(GLM REQUIRED)
+message(STATUS "GLM included: ${GLM_INCLUDE_DIR}")
+
 include_directories(
     ${SDL2_INCLUDE_DIRS}
     ${SDL2_IMAGE_DIRS}
diff --git a/cmake/FindGLM.cmake b/cmake/FindGLM.cmake
new file mode 100644
index 0000000..2d90092
--- /dev/null
+++ b/cmake/FindGLM.cmake
@@ -0,0 +1,63 @@
+# FindGLM - attempts to locate the glm matrix/vector library.
+#
+# This module defines the following variables (on success):
+#   GLM_INCLUDE_DIRS  - where to find glm/glm.hpp
+#   GLM_FOUND         - if the library was successfully located
+#
+# It is trying a few standard installation locations, but can be customized
+# with the following variables:
+#   GLM_ROOT_DIR      - root directory of a glm installation
+#                       Headers are expected to be found in either:
+#                       <GLM_ROOT_DIR>/glm/glm.hpp           OR
+#                       <GLM_ROOT_DIR>/include/glm/glm.hpp
+#                       This variable can either be a cmake or environment
+#                       variable. Note however that changing the value
+#                       of the environment varible will NOT result in
+#                       re-running the header search and therefore NOT
+#                       adjust the variables set by this module.
+
+#=============================================================================
+# Copyright 2012 Carsten Neumann
+#
+# Distributed under the OSI-approved BSD License (the "License");
+# see accompanying file Copyright.txt for details.
+#
+# This software is distributed WITHOUT ANY WARRANTY; without even the
+# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the License for more information.
+#=============================================================================
+# (To distribute this file outside of CMake, substitute the full
+#  License text for the above reference.)
+
+# default search dirs
+SET(_glm_HEADER_SEARCH_DIRS
+    "/usr/include"
+    "/usr/local/include")
+
+# check environment variable
+SET(_glm_ENV_ROOT_DIR "$ENV{GLM_ROOT_DIR}")
+
+IF(NOT GLM_ROOT_DIR AND _glm_ENV_ROOT_DIR)
+    SET(GLM_ROOT_DIR "${_glm_ENV_ROOT_DIR}")
+ENDIF(NOT GLM_ROOT_DIR AND _glm_ENV_ROOT_DIR)
+
+# put user specified location at beginning of search
+IF(GLM_ROOT_DIR)
+    SET(_glm_HEADER_SEARCH_DIRS "${GLM_ROOT_DIR}"
+                                "${GLM_ROOT_DIR}/include"
+                                 ${_glm_HEADER_SEARCH_DIRS})
+ENDIF(GLM_ROOT_DIR)
+
+# locate header
+FIND_PATH(GLM_INCLUDE_DIR "glm/glm.hpp"
+    PATHS ${_glm_HEADER_SEARCH_DIRS})
+
+INCLUDE(FindPackageHandleStandardArgs)
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(GLM DEFAULT_MSG
+    GLM_INCLUDE_DIR)
+
+IF(GLM_FOUND)
+    SET(GLM_INCLUDE_DIRS "${GLM_INCLUDE_DIR}")
+
+    MESSAGE(STATUS "GLM_INCLUDE_DIR = ${GLM_INCLUDE_DIR}")
+ENDIF(GLM_FOUND)
diff --git a/src/PlayerCamera.cpp b/src/PlayerCamera.cpp
new file mode 100644
index 0000000..a9ddde5
--- /dev/null
+++ b/src/PlayerCamera.cpp
@@ -0,0 +1,12 @@
+#include "PlayerCamera.h"
+
+PlayerCamera::PlayerCamera() {
+  SDL_SetRelativeMouseMode(SDL_TRUE);
+  SDL_GetRelativeMouseState(nullptr, nullptr);
+}
+
+PlayerCamera::~PlayerCamera() {}
+
+void PlayerCamera::tick() {}
+
+glm::mat4 PlayerCamera::getMVP() {}
diff --git a/src/PlayerCamera.h b/src/PlayerCamera.h
new file mode 100644
index 0000000..e6e88bf
--- /dev/null
+++ b/src/PlayerCamera.h
@@ -0,0 +1,35 @@
+#pragma once
+#include <SDL2/SDL_mouse.h>
+#include <SDL2/SDL_stdinc.h>
+#include <glm/glm.hpp>
+#include <iostream>
+#include <string>
+
+class PlayerCamera {
+private:
+  // Constants for speed and sensitivity
+  const float movementSpeed = 0.05f;
+  const float mouseSensitivity = 0.05f;
+
+  // Player position
+  struct position {
+    glm::vec4 location;
+    float pitch;
+    float yaw;
+  };
+
+  // Mouse position
+  int mouseX, mouseY;
+
+  // Camera position
+  glm::mat4 MVP;
+
+public:
+  PlayerCamera();
+
+  ~PlayerCamera();
+
+  void tick();
+
+  glm::mat4 getMVP();
+};
diff --git a/src/helpers/RootDir.h b/src/helpers/RootDir.h
new file mode 100644
index 0000000..415955a
--- /dev/null
+++ b/src/helpers/RootDir.h
@@ -0,0 +1,2 @@
+#pragma once
+#define ROOT_DIR "/"