#include "all_includes.hh"

Lod::Lod(Vertex _camera, Chose* root) {
	for (int i = 0; i < 6; i++) {
		merge[i].init((i & 1) ? 1 : -1);
		splitIn[i].init((i & 1) ? 1 : -1);
		splitOut[i].init((i & 1) ? -1 : 1);
	}
	this->camera[0] = _camera.x;
	this->camera[1] = _camera.y;
	this->camera[2] = _camera.z;
	addSplitCube(root);
	setCamera(_camera);
}

void Lod::setCamera(Vertex newCamera) {
	this->camera[0] = newCamera.x;
	this->camera[1] = newCamera.y;
	this->camera[2] = newCamera.z;

	// Merge.
	for(int i = 0; i < 6; i++) {
		Chose* c;
		while((c = merge[i].popIfLessThan(camera[i>>1]))) {
			for(int j = 0; j < 6; j++) {
				if(i == j) continue;
				merge[j].remove(c->lod.mergeBox[j], c);
			}
			doMerge(c);
		}
	}
	// Split out vers split in.
	for(int i = 0; i < 6; i++) {
		Chose* c;
		while((c = splitOut[i].popIfLessThan(camera[i>>1]))) {
			if(c->lod.inCounter == 5) {
				for(int j = 0; j < 6; j++) {
					if(i == j) continue;
					splitIn[j].remove(c->lod.splitBox[j], c);
				}
				doSplit(c);
			}
			else {
				c->lod.inCounter++;
				splitIn[i].insert(c->lod.splitBox[i], c);
			}
		}
	}

	// Split in vers split out.
	for(int i = 0; i < 6; i++) {
		Chose* c;
		while((c = splitIn[i].popIfLessThan(camera[i>>1]))) {
			c->lod.inCounter--;
			splitOut[i].insert(c->lod.splitBox[i], c);
		}
	}
}

void Lod::doSplit(Chose* c) {
	c->split();
	std::vector<Chose*>::iterator it;
	////bool mergeCube = false; // Started to work again on the project, a new warning detected this.
	for (it = c->children.begin(); it != c->children.end(); ++it) {
		////mergeCube = true; // Started to work again on the project, a new warning detected this.
		(*it)->triangulation();
		(*it)->updateAABB();
		// (*it)->drawAABB();
		addSplitCube((*it));
	}
	addMergeCube(c);
	// else {
	// 	// Pour debug : quand on tente de split un objet qui ne peut
	// 	// pas l'être, on vire le dessin de sa splitBox.
	// 	c->clearTriangles();
	// 	c->triangulation();
	// }
}

void Lod::doMerge(Chose* c) {
	doSubMerge(c);
	addSplitCube(c);
}

void Lod::doSubMerge(Chose* c) {
	std::vector<Chose*>::iterator it;
	for (it = c->children.begin(); it != c->children.end(); ++it) {
		for(int j = 0; j < 6; j++) {
			merge[j].remove((*it)->lod.mergeBox[j], (*it));
			splitIn[j].remove((*it)->lod.splitBox[j], (*it));
			splitOut[j].remove((*it)->lod.splitBox[j], (*it));
		}
		doSubMerge(*it);
	}
	c->merge();
}

void Lod::addMergeCube(Chose* chose) {
	// Innutile de détecter si l'on est déjà sortis de la mergeBox :
	// comme elle est plus grosse que la splitBox, on est forcément
	// dedans.
	for(int i = 0; i < 6; i++)
		merge[i].insert(chose->lod.mergeBox[i], chose);
}

void Lod::addSplitCube(Chose* c) {
	c->lod.inCounter = 0;
	for(int i = 0; i < 6; i++) {
		if(splitOut[i].lessThan(c->lod.splitBox[i], camera[i>>1])) {
			c->lod.inCounter++;
			splitIn[i].insert(c->lod.splitBox[i], c);
		} else {
			splitOut[i].insert(c->lod.splitBox[i], c);
		}
	}
	if (c->lod.inCounter == 6) {
		for(int i = 0; i < 6; i++)
			splitIn[i].remove(c->lod.splitBox[i], c);
		doSplit(c);
	}
}