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+/* Project nGenEx
+ Destroyer Studios LLC
+ Copyright © 1997-2004. All Rights Reserved.
+
+ SUBSYSTEM: nGenEx.lib
+ FILE: Projector.h
+ AUTHOR: John DiCamillo
+
+
+ OVERVIEW
+ ========
+ 3D Projection Camera class
+*/
+
+#ifndef Projector_h
+#define Projector_h
+
+#include "Geometry.h"
+#include "Window.h"
+#include "Camera.h"
+#include "Polygon.h"
+
+// +--------------------------------------------------------------------+
+
+class Projector
+{
+public:
+ Projector(Window* win, Camera* cam);
+ virtual ~Projector();
+
+ // Operations:
+ virtual void UseWindow(Window* win);
+ virtual void UseCamera(Camera* cam);
+ virtual void SetDepthScale(float scale);
+ virtual double GetDepthScale() const;
+ virtual void SetFieldOfView(double fov);
+ virtual double GetFieldOfView() const;
+ virtual int SetInfinite(int i);
+ virtual void StartFrame();
+
+ // accessor:
+ Point Pos() const { return camera->Pos(); }
+ Point vrt() { return camera->vrt(); }
+ Point vup() { return camera->vup(); }
+ Point vpn() { return camera->vpn(); }
+ const Matrix& Orientation() const { return camera->Orientation(); }
+
+ double XAngle() const { return xangle; }
+ double YAngle() const { return yangle; }
+
+ bool IsOrthogonal() const { return orthogonal; }
+ void SetOrthogonal(bool o) { orthogonal = o; }
+
+ // projection and clipping geometry:
+ virtual void Transform(Vec3& vec) const;
+ virtual void Transform(Point& point) const;
+
+ virtual void Project(Vec3& vec, bool clamp=true) const;
+ virtual void Project(Point& point, bool clamp=true) const;
+ virtual void ProjectRect(Point& origin, double& w, double& h) const;
+
+ virtual float ProjectRadius(const Vec3& vec, float radius) const;
+
+ virtual void Unproject(Point& point) const;
+ int IsVisible(const Vec3& v, float radius) const;
+ int IsBoxVisible(const Point* p) const;
+
+ float ApparentRadius(const Vec3& v, float radius) const;
+
+ virtual void SetWorldSpace() { frustum_planes = world_planes; }
+ virtual void SetViewSpace() { frustum_planes = view_planes; }
+
+ Plane* GetCurrentClipPlanes() { return frustum_planes; }
+
+ void SetUpFrustum();
+ void ViewToWorld(Point& pin, Point& pout);
+ void ViewToWorld(Vec3& vin, Vec3& vout);
+ void SetWorldspaceClipPlane(Vec3& normal, Plane& plane);
+
+protected:
+ Camera* camera;
+
+ int width, height;
+ double field_of_view;
+ double xscreenscale, yscreenscale, maxscale;
+ double xcenter, ycenter;
+ double xangle, yangle;
+
+ int infinite;
+ float depth_scale;
+ bool orthogonal;
+
+ enum DISPLAY_CONST {
+ NUM_FRUSTUM_PLANES= 4,
+ };
+
+ Plane* frustum_planes;
+ Plane world_planes[NUM_FRUSTUM_PLANES];
+ Plane view_planes[NUM_FRUSTUM_PLANES];
+
+ float xclip0, xclip1;
+ float yclip0, yclip1;
+};
+
+#endif Projector_h
+