ccdemos/common_ply.h
author Radek Brich <radek.brich@devl.cz>
Sat, 29 Mar 2008 02:17:22 +0100
branchpyrit
changeset 53 228cb8bfdd54
parent 41 c1080cb5bd6d
child 69 303583d2fb97
permissions -rw-r--r--
slighly optimized raytrace_worker
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#include <iostream>
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#include <fstream>
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#include <iomanip>
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void load_ply(Raytracer &rt, const char *filename, Material *mat, Vector3 scale, Vector3 transp)
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{
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	vector<NormalVertex*> vertices;
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	vector<Vector3> normals;
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	vector<int> vertex_face_num;
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	ifstream f(filename);
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	string token = "a";
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	if (!f.is_open())
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	{
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		cout << "File not found: " << filename <<endl;
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		exit(1);
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	}
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	// read header
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	int vertex_num, face_num;
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	while (token != "end_header")
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	{
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		f >> token;
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		if (token == "element")
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		{
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			f >> token;
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			if (token == "vertex")
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				f >> vertex_num;
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			if (token == "face")
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				f >> face_num;
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		}
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		f.ignore(1000,'\n');
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	}
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	// read vertices
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	Vector3 P;
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	int num = vertex_num;
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	while (num--)
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	{
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		f >> P.x >> P.y >> P.z;
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		P.x = scale.x*P.x + transp.x;
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		P.y = scale.y*P.y + transp.y;
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		P.z = scale.z*P.z + transp.z;
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		vertices.push_back(new NormalVertex(P));
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		normals.push_back(Vector3());
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		vertex_face_num.push_back(0);
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		f.ignore(1000,'\n');
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	}
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	// read faces
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	Triangle *face;
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	int v1, v2, v3;
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	while (face_num--)
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	{
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		f >> num;
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		if (num != 3)
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		{
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			printf("ply error: faces of %d vertices not supported", num);
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			continue;
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		}
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		f >> v1 >> v2 >> v3;
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		face = new Triangle(vertices.at(v1), vertices.at(v3), vertices.at(v2), mat);
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		rt.addshape(face);
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		face->setSmooth();
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		normals.at(v1) += face->getNormal();
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		vertex_face_num.at(v1)++;
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		normals.at(v2) += face->getNormal();
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		vertex_face_num.at(v2)++;
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		normals.at(v3) += face->getNormal();
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		vertex_face_num.at(v3)++;
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		f.ignore(1000,'\n');
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	}
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	for (int i = 0; i < vertex_num; i++)
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		if (vertex_face_num.at(i))
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		{
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			normals.at(i) /= vertex_face_num.at(i);
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			normals.at(i).normalize();
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			vertices.at(i)->N = normals.at(i);
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		}
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	f.close();
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}