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/*
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 *  ply_load.cpp
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 *  GEL
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 *
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 *  Created by J. Andreas Bærentzen on 08/08/07.
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 *  Copyright 2007 __MyCompanyName__. All rights reserved.
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 *
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 */
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#include <stdio.h>
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#include <math.h>
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#include <string.h>
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#include "rply.h"
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#include "ply_load.h"
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#include <CGLA/Vec4f.h>
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using namespace std;
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using namespace Geometry;
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using namespace CGLA;
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namespace
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{
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	TriMesh *mesh;
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	int vertex_cb(p_ply_argument argument) {
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		static int idx=0;
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		static Vec3f p;
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		long eol;
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		ply_get_argument_user_data(argument, NULL, &eol);
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		if(idx<3)
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			p[idx] = ply_get_argument_value(argument);
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		++idx;
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		if (eol)
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		{
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			mesh->geometry.add_vertex(p);
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			idx=0;
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		}
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		return 1;
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	}
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	int face_cb(p_ply_argument argument) {
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		static Vec3i f;
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		static int idx = 0;
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		long length, value_index;
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		ply_get_argument_property(argument, NULL, &length, &value_index);
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		if(value_index >= 0)
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		{
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			if(value_index < 2)
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				f[value_index] = ply_get_argument_value(argument);
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			else
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			{
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				f[2] = ply_get_argument_value(argument);
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				mesh->mat_idx.push_back(0);
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				mesh->geometry.add_face(f);
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				f[1] = f[2];
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			}
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			return 1;
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		}
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	}
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}
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namespace Geometry
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{
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	void ply_load(const std::string& fn, Geometry::TriMesh& _mesh)
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	{
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		mesh = &_mesh;
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		_mesh.materials.resize(1);
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		_mesh.materials[0].diffuse[0] = 172.0/256;
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		_mesh.materials[0].diffuse[1] = 48.0/256;
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		_mesh.materials[0].diffuse[2] = 72.0/256;
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		_mesh.materials[0].specular[0] = 0.6;
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		_mesh.materials[0].specular[1] = 0.6;
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		_mesh.materials[0].specular[2] = 0.6;
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		_mesh.materials[0].shininess =128;
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		long nvertices, ntriangles;
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		p_ply ply = ply_open(fn.c_str(), NULL);
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		if (!ply) return;
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		if (!ply_read_header(ply)) return;
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		nvertices = ply_set_read_cb(ply, "vertex", "x", vertex_cb, NULL, 0);
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		ply_set_read_cb(ply, "vertex", "y", vertex_cb, NULL, 0);
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		ply_set_read_cb(ply, "vertex", "z", vertex_cb, NULL, 1);
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		ntriangles = ply_set_read_cb(ply, "face", "vertex_indices", face_cb, NULL, 0);
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		ply_read(ply);
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		ply_close(ply);
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	}
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}