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/* Starshatter OpenSource Distribution
Copyright (c) 1997-2004, Destroyer Studios LLC.
All Rights Reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
* Neither the name "Destroyer Studios" nor the names of its contributors
may be used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
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
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