From 2cc21176467d4501adb7bfb9ee03eb9a2a7d14f2 Mon Sep 17 00:00:00 2001
From: majortom6 <tombarrett@siu.edu>
Date: Sun, 19 Feb 2017 08:06:37 -0600
Subject: -removed all references to sdl_rect and location and now everything
 now uses our own class rectangle -standardization of tab spaces to 8 is now
 in effect -refractoring of graphicsobjects.hpp

---
 inc/camera.hpp | 57 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 inc/camera.hpp

(limited to 'inc/camera.hpp')

diff --git a/inc/camera.hpp b/inc/camera.hpp
new file mode 100644
index 0000000..62ae837
--- /dev/null
+++ b/inc/camera.hpp
@@ -0,0 +1,57 @@
+#ifndef camera_h
+#define camera_h
+
+struct Camera
+{
+        public:
+                Camera(const glm::vec3& pos, float fov, float aspect, float zNear, float zFar){
+                this->pos = pos;
+                this->forward = glm::vec3(0.0f, 0.0f, -1.0f);
+                this->up = glm::vec3(0.0f, 1.0f, 0.0f);
+                this->projection = glm::perspective(fov, aspect, zNear, zFar);
+                }
+
+                inline glm::mat4 GetViewProjection() const {
+                return projection * glm::lookAt(pos, pos + forward, up);
+                }
+
+                void MoveForward(){
+                pos += forward * amt;
+                }
+
+                void MoveBackward(){
+                pos += forward * -amt;
+                }
+
+                void MoveRight(){
+                pos += -glm::cross(up, forward) * amt;
+                }
+
+                void MoveLeft(){
+                pos += glm::cross(up, forward) * amt;
+                }
+
+                void MoveUp(){
+                pos += glm::vec3(0,.2,0);
+                }
+
+                void MoveDown(){
+                pos -= glm::vec3(0,.2,0);
+                }
+
+                void Pitch(float angle){
+                glm::vec3 right = glm::normalize(glm::cross(up, forward));
+
+                forward = glm::vec3(glm::normalize(glm::rotate(angle, right) * glm::vec4(forward, 0.0)));
+                up = glm::normalize(glm::cross(forward, right));
+                }
+
+                private:
+                float amt = .2;
+                glm::mat4 projection;
+                glm::vec3 pos;
+                glm::vec3 forward;
+                glm::vec3 up;
+};
+
+#endif
-- 
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