1 files changed, 77 insertions, 0 deletions
diff --git a/gfx/camera.h b/gfx/camera.h
new file mode 100644
index 0000000..b17bcbb
--- /dev/null
+++ b/gfx/camera.h
@@ -0,0 +1,77 @@
+#pragma once
+
+#include "config/types.h"
+#include "frustum.h"
+#include <glm/glm.hpp>
+#include <maths.h>
+#include <ray.h>
+
+class Camera : public Frustum {
+public:
+	Camera(GlobalPosition3D position, Angle fov, Angle aspect, GlobalDistance near, GlobalDistance far);
+
+	[[nodiscard]] Ray<GlobalPosition3D> unProject(const ScreenRelCoord &) const;
+
+	void setAspect(Angle aspect);
+
+	void
+	setPosition(const GlobalPosition3D & p)
+	{
+		position = p;
+		updateView();
+	}
+
+	void
+	setForward(const Direction3D & f)
+	{
+		setForward(f, upFromForward(f));
+	}
+
+	void
+	setForward(const Direction3D & f, const Direction3D & u)
+	{
+		forward = f;
+		up = u;
+		updateView();
+	}
+
+	void
+	setView(const GlobalPosition3D & p, const Direction3D & f)
+	{
+		position = p;
+		setForward(f);
+	}
+
+	void
+	setView(const GlobalPosition3D & p, const Direction3D & f, const Direction3D & u)
+	{
+		position = p;
+		setView(f, u);
+	}
+
+	void
+	lookAt(const GlobalPosition3D & target)
+	{
+		setForward(glm::normalize(RelativePosition3D(target - position)));
+	}
+
+	[[nodiscard]] auto
+	getForward() const
+	{
+		return forward;
+	}
+
+	[[nodiscard]] std::array<GlobalPosition4D, 4> extentsAtDist(GlobalDistance) const;
+
+	[[nodiscard]] static Direction3D upFromForward(const Direction3D & forward);
+
+private:
+	Camera(GlobalPosition3D position, Angle fov, Angle aspect, GlobalDistance near, GlobalDistance far,
+			const glm::mat4 & view, const glm::mat4 & projection);
+	void updateView();
+
+	Angle fov, aspect;
+	Direction3D forward;
+	Direction3D up;
+	GlobalDistance near, far;
+};