From 57b4b2829e8033d6cf3f7bd48c1fe511e00b830c Mon Sep 17 00:00:00 2001
From: Mikko Pulkki <mikko.pulkki@mapbox.com>
Date: Mon, 27 Apr 2020 13:26:49 +0300
Subject: Refactor TransformState to use internal 3d camera

---
 src/mbgl/util/camera.hpp | 42 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)
 create mode 100644 src/mbgl/util/camera.hpp

(limited to 'src/mbgl/util/camera.hpp')

diff --git a/src/mbgl/util/camera.hpp b/src/mbgl/util/camera.hpp
new file mode 100644
index 0000000000..030d7cfaac
--- /dev/null
+++ b/src/mbgl/util/camera.hpp
@@ -0,0 +1,42 @@
+#pragma once
+
+#include <mbgl/util/optional.hpp>
+#include <mbgl/util/size.hpp>
+#include "quaternion.hpp"
+
+namespace mbgl {
+
+class LatLng;
+
+namespace util {
+
+class Camera {
+public:
+    Camera();
+
+    vec3 getPosition() const;
+    mat4 getCameraToWorld(double scale, bool flippedY) const;
+    mat4 getWorldToCamera(double scale, bool flippedY) const;
+    mat4 getCameraToClipPerspective(double fovy, double aspectRatio, double nearZ, double farZ) const;
+
+    vec3 forward() const;
+    vec3 right() const;
+    vec3 up() const;
+
+    const Quaternion& getOrientation() const { return orientation; }
+    void getOrientation(double& pitch, double& bearing) const;
+    void setOrientation(double pitch, double bearing);
+    void setOrientation(const Quaternion& orientation_);
+    void setPosition(const vec3& position);
+
+    // Computes orientation using forward and up vectors of the provided coordinate frame.
+    // Only bearing and pitch components will be used. Does not return a value if input is invalid
+    static optional<Quaternion> orientationFromFrame(const vec3& forward, const vec3& up);
+
+private:
+    Quaternion orientation;
+    mat4 transform; // Position (mercator) and orientation of the camera
+};
+
+} // namespace util
+} // namespace mbgl
\ No newline at end of file
-- 
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