From e33e19d0587146859d48a134ec9fd94e7b7ba5cd Mon Sep 17 00:00:00 2001 From: "FWoltermann@gmail.com" Date: Thu, 8 Dec 2011 14:53:40 +0000 Subject: Initial upload --- nGenEx/Scene.cpp | 261 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 261 insertions(+) create mode 100644 nGenEx/Scene.cpp (limited to 'nGenEx/Scene.cpp') diff --git a/nGenEx/Scene.cpp b/nGenEx/Scene.cpp new file mode 100644 index 0000000..26ef58e --- /dev/null +++ b/nGenEx/Scene.cpp @@ -0,0 +1,261 @@ +/* Project nGenEx + Destroyer Studios LLC + Copyright © 1997-2004. All Rights Reserved. + + SUBSYSTEM: nGenEx.lib + FILE: Scene.cpp + AUTHOR: John DiCamillo + + + OVERVIEW + ======== + A 3D Scene +*/ + +#include "MemDebug.h" +#include "Scene.h" +#include "Graphic.h" +#include "Light.h" + +void Print(const char* fmt, ...); + +// +--------------------------------------------------------------------+ + +Scene::Scene() +{ } + +Scene::~Scene() +{ + background.destroy(); + foreground.destroy(); + graphics.destroy(); + sprites.destroy(); + + lights.destroy(); +} + +// +--------------------------------------------------------------------+ + +void +Scene::AddBackground(Graphic* g) +{ + if (g) { + if (!background.contains(g)) + background.append(g); + + g->SetScene(this); + } +} + +void +Scene::DelBackground(Graphic* g) +{ + if (g) { + background.remove(g); + g->SetScene(0); + } +} + +// +--------------------------------------------------------------------+ + +void +Scene::AddForeground(Graphic* g) +{ + if (g) { + if (!foreground.contains(g)) + foreground.append(g); + + g->SetScene(this); + } +} + +void +Scene::DelForeground(Graphic* g) +{ + if (g) { + foreground.remove(g); + g->SetScene(0); + } +} + +// +--------------------------------------------------------------------+ + +void +Scene::AddGraphic(Graphic* g) +{ + if (g) { + if (!graphics.contains(g)) + graphics.append(g); + + g->SetScene(this); + } +} + +void +Scene::DelGraphic(Graphic* g) +{ + if (g) { + graphics.remove(g) || // it's gotta be in here somewhere! + foreground.remove(g) || // use the logical-or operator to early + sprites.remove(g) || // out when we find it... + background.remove(g); + + g->SetScene(0); + } +} + +// +--------------------------------------------------------------------+ + +void +Scene::AddSprite(Graphic* g) +{ + if (g) { + if (!sprites.contains(g)) + sprites.append(g); + + g->SetScene(this); + } +} + +void +Scene::DelSprite(Graphic* g) +{ + if (g) { + sprites.remove(g); + g->SetScene(0); + } +} + +// +--------------------------------------------------------------------+ + +void +Scene::AddLight(Light* l) +{ + if (l) { + if (!lights.contains(l)) + lights.append(l); + l->SetScene(this); + } +} + +void +Scene::DelLight(Light* l) +{ + if (l) { + lights.remove(l); + l->SetScene(0); + } +} + +// +--------------------------------------------------------------------+ + +void +Scene::Collect() +{ + ListIter iter = graphics; + + while (++iter) { + Graphic* g = iter.value(); + if (g->Life() == 0) { + delete iter.removeItem(); + } + } + + iter.attach(sprites); + + while (++iter) { + Graphic* g = iter.value(); + if (g->Life() == 0) { + delete iter.removeItem(); + } + } + + ListIter iter1 = lights; + + while (++iter1) { + Light* l = iter1.value(); + if (l->Life() == 0) { + delete iter1.removeItem(); + } + } +} + + +// +--------------------------------------------------------------------+ + +bool +Scene::IsLightObscured(const Point& obj_pos, const Point& light_pos, double obj_radius, Point* impact_point) const +{ + Point dir = light_pos - obj_pos; + double len = dir.Normalize(); + + Scene* pThis = (Scene*) this; // cast-away const + Graphic* g = 0; + bool obscured = false; + + ListIter g_iter = pThis->graphics; + while (++g_iter && !obscured) { + g = g_iter.value(); + + if (g->CastsShadow() && !g->Hidden() && !g->IsInfinite()) { + double gdist = (g->Location() - obj_pos).length(); + if (gdist > 0.1 && // different than object being obscured + g->Radius() > obj_radius && // larger than object being obscured + (g->Radius()*400)/gdist > 10) { // projects to a resonable size + + Point delta = (g->Location() - light_pos); + + if (delta.length() > g->Radius() / 100) { // not the object that is emitting the light + Point impact; + obscured = g->CheckRayIntersection(obj_pos, dir, len, impact, false) ? true : false; + + if (impact_point) + *impact_point = impact; + } + } + + else if (obj_radius < 0 && gdist < 0.1) { // special case for camera (needed for cockpits) + Point delta = (g->Location() - light_pos); + + if (delta.length() > g->Radius() / 100) { // not the object that is emitting the light + Point impact; + obscured = g->CheckRayIntersection(obj_pos, dir, len, impact, false) ? true : false; + } + } + } + } + + g_iter.attach(pThis->foreground); + while (++g_iter && !obscured) { + g = g_iter.value(); + + if (g->CastsShadow() && !g->Hidden()) { + double gdist = (g->Location() - obj_pos).length(); + if (gdist > 0.1 && // different than object being obscured + g->Radius() > obj_radius && // larger than object being obscured + (g->Radius()*400)/gdist > 10) { // projects to a resonable size + + Point delta = (g->Location() - light_pos); + + if (delta.length() > g->Radius() / 100) { // not the object that is emitting the light + Point impact; + obscured = g->CheckRayIntersection(obj_pos, dir, len, impact, false) ? true : false; + + if (impact_point) + *impact_point = impact; + } + } + + else if (obj_radius < 0 && gdist < 0.1) { // special case for camera (needed for cockpits) + Point delta = (g->Location() - light_pos); + + if (delta.length() > g->Radius() / 100) { // not the object that is emitting the light + Point impact; + obscured = g->CheckRayIntersection(obj_pos, dir, len, impact, false) ? true : false; + } + } + } + } + + return obscured; +} -- cgit v1.1