Import aap/librw @ masterHEADmaster

Snapshot for re3/reVC vendoring, per @lzcnt.
Source: https://github.com/aap/librw (master).

1 files changed, 238 insertions, 0 deletions

diff --git a/src/world.cpp b/src/world.cpp
new file mode 100644
index 0000000..e80b8e3
--- /dev/null
+++ b/src/world.cpp
@@ -0,0 +1,238 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+
+#include "rwbase.h"
+#include "rwerror.h"
+#include "rwplg.h"
+#include "rwpipeline.h"
+#include "rwobjects.h"
+#include "rwengine.h"
+
+#define PLUGIN_ID ID_WORLD
+
+namespace rw {
+
+int32 World::numAllocated = 0;
+
+PluginList World::s_plglist(sizeof(World));
+
+World*
+World::create(BBox *bbox)
+{
+	World *world = (World*)rwMalloc(s_plglist.size, MEMDUR_EVENT | ID_WORLD);
+	if(world == nil){
+		RWERROR((ERR_ALLOC, s_plglist.size));
+		return nil;
+	}
+	numAllocated++;
+	world->object.init(World::ID, 0);
+	world->localLights.init();
+	world->globalLights.init();
+	world->clumps.init();
+	s_plglist.construct(world);
+	return world;
+}
+
+void
+World::destroy(void)
+{
+	s_plglist.destruct(this);
+	rwFree(this);
+	numAllocated--;
+}
+
+void
+World::addLight(Light *light)
+{
+	assert(light->world == nil);
+	light->world = this;
+	if(light->getType() < Light::POINT){
+		this->globalLights.append(&light->inWorld);
+	}else{
+		this->localLights.append(&light->inWorld);
+		if(light->getFrame())
+			light->getFrame()->updateObjects();
+	}
+}
+
+void
+World::removeLight(Light *light)
+{
+	assert(light->world == this);
+	light->inWorld.remove();
+	light->world = nil;
+}
+
+void
+World::addCamera(Camera *cam)
+{
+	assert(cam->world == nil);
+	cam->world = this;
+	if(cam->getFrame())
+		cam->getFrame()->updateObjects();
+}
+
+void
+World::removeCamera(Camera *cam)
+{
+	assert(cam->world == this);
+	cam->world = nil;
+}
+
+void
+World::addAtomic(Atomic *atomic)
+{
+	assert(atomic->world == nil);
+	atomic->world = this;
+	if(atomic->getFrame())
+		atomic->getFrame()->updateObjects();
+}
+
+void
+World::removeAtomic(Atomic *atomic)
+{
+	assert(atomic->world == this);
+	atomic->world = nil;
+}
+
+void
+World::addClump(Clump *clump)
+{
+	assert(clump->world == nil);
+	clump->world = this;
+	this->clumps.add(&clump->inWorld);
+	FORLIST(lnk, clump->atomics)
+		this->addAtomic(Atomic::fromClump(lnk));
+	FORLIST(lnk, clump->lights)
+		this->addLight(Light::fromClump(lnk));
+	FORLIST(lnk, clump->cameras)
+		this->addCamera(Camera::fromClump(lnk));
+
+	if(clump->getFrame()){
+		clump->getFrame()->matrix.optimize();
+		clump->getFrame()->updateObjects();
+	}
+}
+
+void
+World::removeClump(Clump *clump)
+{
+	assert(clump->world == this);
+	clump->inWorld.remove();
+	FORLIST(lnk, clump->atomics)
+		this->removeAtomic(Atomic::fromClump(lnk));
+	FORLIST(lnk, clump->lights)
+		this->removeLight(Light::fromClump(lnk));
+	FORLIST(lnk, clump->cameras)
+		this->removeCamera(Camera::fromClump(lnk));
+	clump->world = nil;
+}
+
+void
+World::render(void)
+{
+	// this is very wrong, we really want world sectors
+	FORLIST(lnk, this->clumps)
+		Clump::fromWorld(lnk)->render();
+}
+
+// Find lights that illuminate an atomic
+void
+World::enumerateLights(Atomic *atomic, WorldLights *lightData)
+{
+	int32 maxDirectionals, maxLocals;
+
+	maxDirectionals = lightData->numDirectionals;
+	maxLocals = lightData->numLocals;
+
+	lightData->numDirectionals = 0;
+	lightData->numLocals = 0;
+	lightData->numAmbients = 0;
+	lightData->ambient.red = 0.0f;
+	lightData->ambient.green = 0.0f;
+	lightData->ambient.blue = 0.0f;
+	lightData->ambient.alpha = 1.0f;
+
+	bool32 normals = atomic->geometry->flags & Geometry::NORMALS;
+
+	FORLIST(lnk, this->globalLights){
+		Light *l = Light::fromWorld(lnk);
+		if((l->getFlags() & Light::LIGHTATOMICS) == 0)
+			continue;
+		if(l->getType() == Light::AMBIENT){
+			lightData->ambient.red   += l->color.red;
+			lightData->ambient.green += l->color.green;
+			lightData->ambient.blue  += l->color.blue;
+			lightData->numAmbients++;
+		}else if(normals && l->getType() == Light::DIRECTIONAL){
+			if(lightData->numDirectionals < maxDirectionals)
+				lightData->directionals[lightData->numDirectionals++] = l;
+		}
+	}
+
+	if(atomic->world != this)
+		return;
+
+	if(!normals)
+		return;
+
+	// TODO: for this we would use an atomic's world sectors, but we don't have those yet
+	FORLIST(lnk, this->localLights){
+		if(lightData->numLocals >= maxLocals)
+			return;
+
+		Light *l = Light::fromWorld(lnk);
+		if((l->getFlags() & Light::LIGHTATOMICS) == 0)
+			continue;
+
+		// check if spheres are intersecting
+		Sphere *atomsphere = atomic->getWorldBoundingSphere();
+		V3d dist = sub(l->getFrame()->getLTM()->pos, atomsphere->center);
+		if(length(dist) < atomsphere->radius + l->radius)
+			lightData->locals[lightData->numLocals++] = l;
+	}
+}
+
+// Find all lights, for im3d lighting extension
+// missing flags and bounding spheres so more primitive than above
+void
+World::enumerateLights(WorldLights *lightData)
+{
+	int32 maxDirectionals, maxLocals;
+
+	maxDirectionals = lightData->numDirectionals;
+	maxLocals = lightData->numLocals;
+
+	lightData->numDirectionals = 0;
+	lightData->numLocals = 0;
+	lightData->numAmbients = 0;
+	lightData->ambient.red = 0.0f;
+	lightData->ambient.green = 0.0f;
+	lightData->ambient.blue = 0.0f;
+	lightData->ambient.alpha = 1.0f;
+
+	FORLIST(lnk, this->globalLights){
+		Light *l = Light::fromWorld(lnk);
+		if(l->getType() == Light::AMBIENT){
+			lightData->ambient.red   += l->color.red;
+			lightData->ambient.green += l->color.green;
+			lightData->ambient.blue  += l->color.blue;
+			lightData->numAmbients++;
+		}else if(l->getType() == Light::DIRECTIONAL){
+			if(lightData->numDirectionals < maxDirectionals)
+				lightData->directionals[lightData->numDirectionals++] = l;
+		}
+	}
+
+	FORLIST(lnk, this->localLights){
+		if(lightData->numLocals >= maxLocals)
+			return;
+
+		Light *l = Light::fromWorld(lnk);
+		lightData->locals[lightData->numLocals++] = l;
+	}
+}
+
+}