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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: http://www.qt-project.org/
**
** This file is part of the Qt3D module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <QtGui/qvector3d.h>
#include "qarray.h"
static void meshError(const char *filename)
{
qWarning("%s: does not contain valid mesh data\n", filename);
exit(1);
}
static int numPatches = 0;
static int numVertices = 0;
static int *patches = 0;
int main(int argc, char *argv[])
{
int depth = 4;
int teapotAdjust = 0;
int reversePatches = 0;
char buffer[BUFSIZ];
char *filename;
char *name;
QArray<QVector3D> vertices;
// Validate the command-line arguments.
if (argc < 3) {
qWarning("Usage: %s [--teapot-adjust] [--reverse-patches] mesh-filename name [depth]\n", argv[0]);
return 1;
}
if (!strcmp(argv[1], "--teapot-adjust")) {
// Adjust the vertices to correctly size and position the teapot.
++argv;
--argc;
teapotAdjust = 1;
}
if (!strcmp(argv[1], "--reverse-patches")) {
// Reverse the coordinate order of patches (fixes teacup).
++argv;
--argc;
reversePatches = 1;
}
filename = argv[1];
name = argv[2];
if (argc > 3)
depth = atoi(argv[3]);
// Read the mesh data from the input file and determine
// if it is a Bezier patch mesh or a triangle mesh.
FILE *file;
if ((file = fopen(filename, "r")) == NULL) {
perror(filename);
return 1;
}
if (fscanf(file, "%i\n", &numPatches) != 1)
meshError(filename);
patches = new int [numPatches * 17];
for (int patch = 0; patch < numPatches; ++patch) {
int *p = patches + patch * 17;
if (!fgets(buffer, sizeof(buffer), file))
meshError(filename);
if (sscanf(buffer, "%i, %i, %i, %i, %i, %i, %i, %i, "
"%i, %i, %i, %i, %i, %i, %i, %i, %i\n",
p, p + 1, p + 2, p + 3,
p + 4, p + 5, p + 6, p + 7,
p + 8, p + 9, p + 10, p + 11,
p + 12, p + 13, p + 14, p + 15, p + 16) != 17) {
if (sscanf(buffer, "%i, %i, %i, %i, %i, %i, %i, %i, "
"%i, %i, %i, %i, %i, %i, %i, %i\n",
p, p + 1, p + 2, p + 3,
p + 4, p + 5, p + 6, p + 7,
p + 8, p + 9, p + 10, p + 11,
p + 12, p + 13, p + 14, p + 15) != 16) {
meshError(filename);
} else {
p[16] = -1; // Use the default minimum depth value.
}
}
if (reversePatches) {
int reversed[16];
for (int i = 0; i < 16; ++i)
reversed[i] = p[(i & 0x0C) + (3 - (i % 4))];
for (int i = 0; i < 16; ++i)
p[i] = reversed[i];
}
// The standard patch indices are 1-based, not 0-based.
// Correct for that problem here.
for (int offset = 0; offset < 16; ++offset)
--(p[offset]);
}
if (fscanf(file, "%i\n", &numVertices) != 1)
meshError(filename);
for (int vertex = 0; vertex < numVertices; ++vertex) {
float x, y, z, xnormal, ynormal, znormal;
if (!fgets(buffer, sizeof(buffer), file))
meshError(filename);
if (sscanf(buffer, "%f, %f, %f, %f, %f, %f\n",
&x, &y, &z, &xnormal, &ynormal, &znormal) != 6) {
if (sscanf(buffer, "%f, %f, %f\n", &x, &y, &z) != 3)
meshError(filename);
}
if (teapotAdjust) {
// Do the equivalent of the following transformation:
// matrix.rotate(270.0f, 1.0f, 0.0f, 0.0f);
// matrix.scale(0.5f, 0.5f, 0.5f);
// matrix.translate(0.0f, 0.0f, -1.5f);
z -= 1.5f;
x *= 0.5f;
y *= 0.5f;
z *= 0.5f;
float y2 = z;
float z2 = -y;
y = y2;
z = z2;
}
vertices.append(QVector3D(x, y, z));
}
fclose(file);
// Generate the output data.
printf("// Generated from %s by meshcvt, depth = %d\n\n", filename, depth);
printf("#define %sBezierVertexCount %d\n", name, numVertices);
printf("#define %sPatchCount %d\n", name, numPatches);
printf("#define %sDepth %d\n", name, depth);
printf("static float const %sBezierVertexData[] = {\n", name);
for (int vertex = 0; vertex < vertices.count(); ++vertex) {
QVector3D v = vertices[vertex];
printf(" %ff, %ff, %ff", v.x(), v.y(), v.z());
if (vertex < (vertices.count() - 1))
printf(",\n");
else
printf("\n");
}
printf("};\n\n");
printf("static ushort const %sPatchData[] = {\n", name);
for (int patch = 0; patch < numPatches; ++patch) {
int *p = patches + patch * 17;
printf(" %d, %d, %d, %d, %d, %d, %d, %d, "
"%d, %d, %d, %d, %d, %d, %d, %d",
p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7],
p[8], p[9], p[10], p[11], p[12], p[13], p[14], p[15]);
if (patch < (numPatches - 1))
printf(",\n");
else
printf("\n");
}
printf("};\n");
printf("\n");
printf("class %sPatches : public QGLBezierPatches\n{\n", name);
printf("public:\n");
printf(" %sPatches()\n", name);
printf(" {\n");
printf(" QVector3DArray positions;\n");
printf(" for (int pindex = 0; pindex < %sPatchCount * 16; ++pindex) {\n", name);
printf(" int vindex = %sPatchData[pindex];\n", name);
printf(" positions.append(%sBezierVertexData[vindex * 3],\n", name);
printf(" %sBezierVertexData[vindex * 3 + 1],\n", name);
printf(" %sBezierVertexData[vindex * 3 + 2]);\n", name);
printf(" }\n");
printf(" setPositions(positions);\n");
printf(" setSubdivisionDepth(%sDepth);\n", name);
printf(" }\n");
printf("};\n");
// Dump some statistics to stderr.
qWarning("Depth: %d\n", depth);
qWarning("Number of vertices: %d\n", numVertices);
qWarning("Number of patches: %d\n", numPatches);
int storage = numVertices * sizeof(float) * 3;
storage += numPatches * sizeof(ushort);
qWarning("Bezier storage: %d bytes\n", storage);
return 0;
}
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