Moved Stars45 to StarsEx

1 files changed, 0 insertions, 473 deletions

diff --git a/Stars45/Projector.cpp b/Stars45/Projector.cpp
deleted file mode 100644
index afa456e..0000000
--- a/Stars45/Projector.cpp
+++ /dev/null
@@ -1,473 +0,0 @@
-/*  Starshatter: The Open Source Project
-    Copyright (c) 2021-2022, Starshatter: The Open Source Project Contributors
-    Copyright (c) 2011-2012, Starshatter OpenSource Distribution Contributors
-    Copyright (c) 1997-2006, Destroyer Studios LLC.
-
-    AUTHOR:       John DiCamillo
-
-
-    OVERVIEW
-    ========
-    3D Projection Camera class
-*/
-
-#ifndef NOMINMAX
-#define NOMINMAX
-#endif
-
-#include <algorithm>
-
-#include "Projector.h"
-#include "Utils.h"
-
-// +--------------------------------------------------------------------+
-
-static const float   CLIP_PLANE_EPSILON   = 0.0001f;
-static const double  Z_NEAR               = 1.0;
-
-// +--------------------------------------------------------------------+
-
-static Camera  emergency_cam;
-
-// +--------------------------------------------------------------------+
-
-Projector::Projector(Window* window, Camera* cam)
-: camera(cam), infinite(0), depth_scale(1.0f), orthogonal(false), field_of_view(2)
-{
-    if (!camera)
-    camera = &emergency_cam;
-
-    UseWindow(window);
-}
-
-Projector::~Projector()
-{ }
-
-// +--------------------------------------------------------------------+
-
-void
-Projector::UseCamera(Camera* cam)
-{
-    if (cam)
-    camera = cam;
-    else
-    camera = &emergency_cam;
-}
-
-void
-Projector::UseWindow(Window* win)
-{
-    Rect r  = win->GetRect();
-    width   = r.w;
-    height  = r.h;
-
-    xcenter = (width  / 2.0);
-    ycenter = (height / 2.0);
-
-    xclip0  = 0.0f;
-    xclip1  = (float) width-0.5f;
-    yclip0  = 0.0f;
-    yclip1  = (float) height-0.5f;
-
-    SetFieldOfView(field_of_view);
-}
-
-void
-Projector::SetFieldOfView(double fov)
-{
-    field_of_view = fov;
-
-    xscreenscale = width  / fov;
-    yscreenscale = height / fov;
-
-    maxscale     = std::max(xscreenscale, yscreenscale);
-
-    xangle       = atan(2.0/fov * maxscale/xscreenscale);
-    yangle       = atan(2.0/fov * maxscale/yscreenscale);
-}
-
-double
-Projector::GetFieldOfView() const
-{
-    return field_of_view;
-}
-
-void
-Projector::SetDepthScale(float scale)
-{
-    depth_scale = scale;
-}
-
-double
-Projector::GetDepthScale() const
-{
-    return depth_scale;
-}
-
-int
-Projector::SetInfinite(int i)
-{
-    int old = infinite;
-    infinite = i;
-    return old;
-}
-
-// +--------------------------------------------------------------------+
-
-void
-Projector::StartFrame()
-{
-    SetUpFrustum();
-    SetWorldSpace();
-}
-
-// +--------------------------------------------------------------------+
-// Transform a point from worldspace to viewspace.
-// +--------------------------------------------------------------------+
-
-void
-Projector::Transform(Vec3& vec) const
-{
-    Vec3 tvert = vec;
-
-    // Translate into a viewpoint-relative coordinate
-    if (!infinite)
-    tvert -= camera->Pos();
-
-    // old method:
-    vec.x = (tvert * camera->vrt());
-    vec.y = (tvert * camera->vup());
-    vec.z = (tvert * camera->vpn());
-
-    // Rotate into the view orientation
-    // vec = tvert * camera->Orientation();
-}
-
-// +--------------------------------------------------------------------+
-// Transform a point from worldspace to viewspace.
-// +--------------------------------------------------------------------+
-
-void
-Projector::Transform(Point& point) const
-{
-    Point tvert = point;
-
-    // Translate into a viewpoint-relative coordinate
-    if (!infinite)
-    tvert -= camera->Pos();
-
-    // old method:
-    point.x = (tvert * camera->vrt());
-    point.y = (tvert * camera->vup());
-    point.z = (tvert * camera->vpn());
-
-    // Rotate into the view orientation
-    // point = tvert * camera->Orientation();
-}
-
-// +--------------------------------------------------------------------+
-// APPARENT RADIUS OF PROJECTED OBJECT
-// Project a viewspace point into screen coordinates.
-// Use projected Z to determine apparent radius of object.
-// +--------------------------------------------------------------------+
-
-float
-Projector::ProjectRadius(const Vec3& v, float radius) const
-{
-    return (float) fabs((radius * maxscale) / v.z);
-}
-
-// +--------------------------------------------------------------------+
-// IN PLACE PROJECTION OF POINT
-// Project a viewspace point into screen coordinates.
-// Note that the y axis goes up in worldspace and viewspace, but
-// goes down in screenspace.
-// +--------------------------------------------------------------------+
-
-void
-Projector::Project(Vec3& v, bool clamp) const
-{
-    double  zrecip;
-
-    if (orthogonal) {
-        double scale = field_of_view/2;
-        v.x  = (float)           (xcenter + scale * v.x);
-        v.y  = (float) (height - (ycenter + scale * v.y));
-        v.z  = (float) (0.0f);
-    }
-
-    else {
-        //zrecip = 2 * (1.0e5 / (1.0e5-1)) / v.z;
-        //zrecip = 2 * 0.97 / v.z; -- what the heck was this version used for?
-
-        zrecip = 2 / v.z;
-        v.x  = (float)           (xcenter + maxscale * v.x * zrecip);
-        v.y  = (float) (height - (ycenter + maxscale * v.y * zrecip));
-        v.z  = (float) (1 - zrecip);
-    }
-
-    // clamp the point to the viewport:
-    if (clamp) {
-        if (v.x < xclip0) v.x = xclip0;
-        if (v.x > xclip1) v.x = xclip1;
-        if (v.y < yclip0) v.y = yclip0;
-        if (v.y > yclip1) v.y = yclip1;
-    }
-}
-
-// +--------------------------------------------------------------------+
-// IN PLACE PROJECTION OF POINT
-// Project a viewspace point into screen coordinates.
-// Note that the y axis goes up in worldspace and viewspace, but
-// goes down in screenspace.
-// +--------------------------------------------------------------------+
-
-void
-Projector::Project(Point& v, bool clamp) const
-{
-    double  zrecip;
-
-    if (orthogonal) {
-        double scale = field_of_view/2;
-        v.x  =           (xcenter + scale * v.x);
-        v.y  = (height - (ycenter + scale * v.y));
-        v.z  = 0;
-    }
-
-    else {
-        zrecip = 1 / v.z;
-        v.x  =           (xcenter + 2 * maxscale * v.x * zrecip);
-        v.y  = (height - (ycenter + 2 * maxscale * v.y * zrecip));
-        v.z  = (1 - zrecip);
-    }
-
-    // clamp the point to the viewport:
-    if (clamp) {
-        if (v.x < xclip0) v.x = xclip0;
-        if (v.x > xclip1) v.x = xclip1;
-        if (v.y < yclip0) v.y = yclip0;
-        if (v.y > yclip1) v.y = yclip1;
-    }
-}
-
-// +--------------------------------------------------------------------+
-// IN PLACE UN-PROJECTION OF POINT
-// Convert a point in screen coordinates back to viewspace.
-// Note that the y axis goes up in worldspace and viewspace, but
-// goes down in screenspace.
-// +--------------------------------------------------------------------+
-
-void
-Projector::Unproject(Point& v) const
-{
-    double  zrecip = 1 / v.z;
-
-    /***
-    * forward projection:
-v.x  = (xcenter + maxscale * v.x * zrecip);
-v.y  = (height - (ycenter + maxscale * v.y * zrecip));
-v.z  = (1 - zrecip);
-***/
-
-    v.x  = (         v.x - xcenter) / (maxscale * zrecip);
-    v.y  = (height - v.y - ycenter) / (maxscale * zrecip);
-}
-
-// +--------------------------------------------------------------------+
-// IN PLACE PROJECTION OF RECTANGLE (FOR SPRITES)
-// Project a viewspace point into screen coordinates.
-// Note that the y axis goes up in worldspace and viewspace, but
-// goes down in screenspace.
-// +--------------------------------------------------------------------+
-
-void
-Projector::ProjectRect(Point& v, double& w, double& h) const
-{
-    double  zrecip;
-
-    if (orthogonal) {
-        double scale = field_of_view/2;
-        v.x  =           (xcenter + scale * v.x);
-        v.y  = (height - (ycenter + scale * v.y));
-        v.z  = 0;
-    }
-
-    else {
-        zrecip = 1 / v.z;
-        v.x  =           (xcenter + 2 * maxscale * v.x * zrecip);
-        v.y  = (height - (ycenter + 2 * maxscale * v.y * zrecip));
-        v.z  = (1 - Z_NEAR*zrecip);
-
-        w   *= maxscale * zrecip;
-        h   *= maxscale * zrecip;
-    }
-}
-
-// +--------------------------------------------------------------------+
-// Set up a clip plane with the specified normal.
-// +--------------------------------------------------------------------+
-
-void
-Projector::SetWorldspaceClipPlane(Vec3& normal, Plane& plane)
-{
-    // Rotate the plane normal into worldspace
-    ViewToWorld(normal, plane.normal);
-    plane.distance = (float) (camera->Pos() * plane.normal + CLIP_PLANE_EPSILON);
-}
-
-// +--------------------------------------------------------------------+
-// Set up the planes of the frustum, in worldspace coordinates.
-// +--------------------------------------------------------------------+
-
-void
-Projector::SetUpFrustum()
-{
-    double  angle, s, c;
-    Vec3    normal;
-
-    angle = XAngle();
-    s = sin(angle);
-    c = cos(angle);
-
-    // Left clip plane
-    normal.x = (float) s;
-    normal.y = (float) 0;
-    normal.z = (float) c;
-    view_planes[0].normal   = normal;
-    view_planes[0].distance = CLIP_PLANE_EPSILON;
-    SetWorldspaceClipPlane(normal, world_planes[0]);
-
-    // Right clip plane
-    normal.x = (float) -s;
-    view_planes[1].normal   = normal;
-    view_planes[1].distance = CLIP_PLANE_EPSILON;
-    SetWorldspaceClipPlane(normal, world_planes[1]);
-
-    angle = YAngle();
-    s = sin(angle);
-    c = cos(angle);
-
-    // Bottom clip plane
-    normal.x = (float) 0;
-    normal.y = (float) s;
-    normal.z = (float) c;
-    view_planes[2].normal   = normal;
-    view_planes[2].distance = CLIP_PLANE_EPSILON;
-    SetWorldspaceClipPlane(normal, world_planes[2]);
-
-    // Top clip plane
-    normal.y = (float) -s;
-    view_planes[3].normal   = normal;
-    view_planes[3].distance = CLIP_PLANE_EPSILON;
-    SetWorldspaceClipPlane(normal, world_planes[3]);
-}
-
-// +--------------------------------------------------------------------+
-// Clip the point against the frustum and return 1 if partially inside
-// Return 2 if completely inside
-// +--------------------------------------------------------------------+
-
-int
-Projector::IsVisible(const Vec3& v, float radius) const
-{
-    int visible = 1;
-    int complete = 1;
-
-    Plane* plane = (Plane*) frustum_planes;
-    if (infinite) {
-        complete = 0;
-
-        for (int i = 0; visible && (i < NUM_FRUSTUM_PLANES); i++) {
-            visible = ((v * plane->normal) >= CLIP_PLANE_EPSILON);
-            plane++;
-        }
-    }
-    else {
-        for (int i = 0; visible && (i < NUM_FRUSTUM_PLANES); i++) {
-            float dot = v * plane->normal;
-            visible  = ((dot + radius) >= plane->distance);
-            complete = complete && ((dot - radius) >= plane->distance);
-            plane++;
-        }
-    }
-
-    return visible + complete;
-}
-
-// +--------------------------------------------------------------------+
-// Clip the bouding point against the frustum and return non zero
-// if at least partially inside.  This version is not terribly
-// efficient as it checks all eight box corners rather than just
-// the minimum two.
-// +--------------------------------------------------------------------+
-
-int
-Projector::IsBoxVisible(const Point* p) const
-{
-    int   i, j, outside = 0;
-
-    // if all eight corners are outside of the same
-    // frustrum plane, then the box is not visible
-    Plane* plane = (Plane*) frustum_planes;
-
-    if (infinite) {
-        for (i = 0; !outside && (i < NUM_FRUSTUM_PLANES); i++) {
-            for (j = 0; j < 8; j++)
-            outside += (p[j] * plane->normal) < CLIP_PLANE_EPSILON;
-
-            if (outside < 8)
-            outside = 0;
-
-            plane++;
-        }
-    }
-    else {
-        for (i = 0; !outside && (i < NUM_FRUSTUM_PLANES); i++) {
-            for (j = 0; j < 8; j++)
-            outside += (p[j] * plane->normal) < plane->distance;
-
-            if (outside < 8)
-            outside = 0;
-
-            plane++;
-        }
-    }
-
-    // if not outside, then the box is visible
-    return !outside;
-}
-
-// +--------------------------------------------------------------------+
-
-float
-Projector::ApparentRadius(const Vec3& v, float radius) const
-{
-    Vec3 vloc = v;
-
-    Transform(vloc);                  // transform in place
-    return ProjectRadius(vloc, radius);
-}
-
-
-// +--------------------------------------------------------------------+
-// Rotate a vector from viewspace to worldspace.
-// +--------------------------------------------------------------------+
-
-void
-Projector::ViewToWorld(Point& pin, Point& pout)
-{
-    // Rotate into the world orientation
-    pout.x = pin.x * camera->vrt().x + pin.y * camera->vup().x + pin.z * camera->vpn().x;
-    pout.y = pin.x * camera->vrt().y + pin.y * camera->vup().y + pin.z * camera->vpn().y;
-    pout.z = pin.x * camera->vrt().z + pin.y * camera->vup().z + pin.z * camera->vpn().z;
-}
-
-void
-Projector::ViewToWorld(Vec3& vin, Vec3& vout)
-{
-    // Rotate into the world orientation
-    vout.x = (float) (vin.x * camera->vrt().x + vin.y * camera->vup().x + vin.z * camera->vpn().x);
-    vout.y = (float) (vin.x * camera->vrt().y + vin.y * camera->vup().y + vin.z * camera->vpn().y);
-    vout.z = (float) (vin.x * camera->vrt().z + vin.y * camera->vup().z + vin.z * camera->vpn().z);
-}
-