366 lines
13 KiB
C++
366 lines
13 KiB
C++
/* OpenSceneGraph example, osgteapot.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*/
|
|
|
|
#include <osg/Geode>
|
|
#include <osg/TexGen>
|
|
#include <osg/Texture2D>
|
|
|
|
#include <osgDB/ReadFile>
|
|
|
|
#include <osgViewer/Viewer>
|
|
|
|
#include <osgXR/osgXR>
|
|
|
|
|
|
// The classic OpenGL teapot... taken form glut-3.7/lib/glut/glut_teapot.c
|
|
|
|
/* Copyright (c) Mark J. Kilgard, 1994. */
|
|
|
|
/**
|
|
(c) Copyright 1993, Silicon Graphics, Inc.
|
|
|
|
ALL RIGHTS RESERVED
|
|
|
|
Permission to use, copy, modify, and distribute this software
|
|
for any purpose and without fee is hereby granted, provided
|
|
that the above copyright notice appear in all copies and that
|
|
both the copyright notice and this permission notice appear in
|
|
supporting documentation, and that the name of Silicon
|
|
Graphics, Inc. not be used in advertising or publicity
|
|
pertaining to distribution of the software without specific,
|
|
written prior permission.
|
|
|
|
THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU
|
|
"AS-IS" AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR
|
|
OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF
|
|
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. IN NO
|
|
EVENT SHALL SILICON GRAPHICS, INC. BE LIABLE TO YOU OR ANYONE
|
|
ELSE FOR ANY DIRECT, SPECIAL, INCIDENTAL, INDIRECT OR
|
|
CONSEQUENTIAL DAMAGES OF ANY KIND, OR ANY DAMAGES WHATSOEVER,
|
|
INCLUDING WITHOUT LIMITATION, LOSS OF PROFIT, LOSS OF USE,
|
|
SAVINGS OR REVENUE, OR THE CLAIMS OF THIRD PARTIES, WHETHER OR
|
|
NOT SILICON GRAPHICS, INC. HAS BEEN ADVISED OF THE POSSIBILITY
|
|
OF SUCH LOSS, HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
|
|
ARISING OUT OF OR IN CONNECTION WITH THE POSSESSION, USE OR
|
|
PERFORMANCE OF THIS SOFTWARE.
|
|
|
|
US Government Users Restricted Rights
|
|
|
|
Use, duplication, or disclosure by the Government is subject to
|
|
restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
|
|
(c)(1)(ii) of the Rights in Technical Data and Computer
|
|
Software clause at DFARS 252.227-7013 and/or in similar or
|
|
successor clauses in the FAR or the DOD or NASA FAR
|
|
Supplement. Unpublished-- rights reserved under the copyright
|
|
laws of the United States. Contractor/manufacturer is Silicon
|
|
Graphics, Inc., 2011 N. Shoreline Blvd., Mountain View, CA
|
|
94039-7311.
|
|
|
|
OpenGL(TM) is a trademark of Silicon Graphics, Inc.
|
|
*/
|
|
|
|
|
|
/* Rim, body, lid, and bottom data must be reflected in x and
|
|
y; handle and spout data across the y axis only. */
|
|
|
|
static int patchdata[][16] =
|
|
{
|
|
/* rim */
|
|
{102, 103, 104, 105, 4, 5, 6, 7, 8, 9, 10, 11,
|
|
12, 13, 14, 15},
|
|
/* body */
|
|
{12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23,
|
|
24, 25, 26, 27},
|
|
{24, 25, 26, 27, 29, 30, 31, 32, 33, 34, 35, 36,
|
|
37, 38, 39, 40},
|
|
/* lid */
|
|
{96, 96, 96, 96, 97, 98, 99, 100, 101, 101, 101,
|
|
101, 0, 1, 2, 3,},
|
|
{0, 1, 2, 3, 106, 107, 108, 109, 110, 111, 112,
|
|
113, 114, 115, 116, 117},
|
|
/* bottom */
|
|
{118, 118, 118, 118, 124, 122, 119, 121, 123, 126,
|
|
125, 120, 40, 39, 38, 37},
|
|
/* handle */
|
|
{41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52,
|
|
53, 54, 55, 56},
|
|
{53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64,
|
|
28, 65, 66, 67},
|
|
/* spout */
|
|
{68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
|
|
80, 81, 82, 83},
|
|
{80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91,
|
|
92, 93, 94, 95}
|
|
};
|
|
/* *INDENT-OFF* */
|
|
|
|
static float cpdata[][3] =
|
|
{
|
|
{0.2, 0, 2.7}, {0.2, -0.112, 2.7}, {0.112, -0.2, 2.7}, {0,
|
|
-0.2, 2.7}, {1.3375, 0, 2.53125}, {1.3375, -0.749, 2.53125},
|
|
{0.749, -1.3375, 2.53125}, {0, -1.3375, 2.53125}, {1.4375,
|
|
0, 2.53125}, {1.4375, -0.805, 2.53125}, {0.805, -1.4375,
|
|
2.53125}, {0, -1.4375, 2.53125}, {1.5, 0, 2.4}, {1.5, -0.84,
|
|
2.4}, {0.84, -1.5, 2.4}, {0, -1.5, 2.4}, {1.75, 0, 1.875},
|
|
{1.75, -0.98, 1.875}, {0.98, -1.75, 1.875}, {0, -1.75,
|
|
1.875}, {2, 0, 1.35}, {2, -1.12, 1.35}, {1.12, -2, 1.35},
|
|
{0, -2, 1.35}, {2, 0, 0.9}, {2, -1.12, 0.9}, {1.12, -2,
|
|
0.9}, {0, -2, 0.9}, {-2, 0, 0.9}, {2, 0, 0.45}, {2, -1.12,
|
|
0.45}, {1.12, -2, 0.45}, {0, -2, 0.45}, {1.5, 0, 0.225},
|
|
{1.5, -0.84, 0.225}, {0.84, -1.5, 0.225}, {0, -1.5, 0.225},
|
|
{1.5, 0, 0.15}, {1.5, -0.84, 0.15}, {0.84, -1.5, 0.15}, {0,
|
|
-1.5, 0.15}, {-1.6, 0, 2.025}, {-1.6, -0.3, 2.025}, {-1.5,
|
|
-0.3, 2.25}, {-1.5, 0, 2.25}, {-2.3, 0, 2.025}, {-2.3, -0.3,
|
|
2.025}, {-2.5, -0.3, 2.25}, {-2.5, 0, 2.25}, {-2.7, 0,
|
|
2.025}, {-2.7, -0.3, 2.025}, {-3, -0.3, 2.25}, {-3, 0,
|
|
2.25}, {-2.7, 0, 1.8}, {-2.7, -0.3, 1.8}, {-3, -0.3, 1.8},
|
|
{-3, 0, 1.8}, {-2.7, 0, 1.575}, {-2.7, -0.3, 1.575}, {-3,
|
|
-0.3, 1.35}, {-3, 0, 1.35}, {-2.5, 0, 1.125}, {-2.5, -0.3,
|
|
1.125}, {-2.65, -0.3, 0.9375}, {-2.65, 0, 0.9375}, {-2,
|
|
-0.3, 0.9}, {-1.9, -0.3, 0.6}, {-1.9, 0, 0.6}, {1.7, 0,
|
|
1.425}, {1.7, -0.66, 1.425}, {1.7, -0.66, 0.6}, {1.7, 0,
|
|
0.6}, {2.6, 0, 1.425}, {2.6, -0.66, 1.425}, {3.1, -0.66,
|
|
0.825}, {3.1, 0, 0.825}, {2.3, 0, 2.1}, {2.3, -0.25, 2.1},
|
|
{2.4, -0.25, 2.025}, {2.4, 0, 2.025}, {2.7, 0, 2.4}, {2.7,
|
|
-0.25, 2.4}, {3.3, -0.25, 2.4}, {3.3, 0, 2.4}, {2.8, 0,
|
|
2.475}, {2.8, -0.25, 2.475}, {3.525, -0.25, 2.49375},
|
|
{3.525, 0, 2.49375}, {2.9, 0, 2.475}, {2.9, -0.15, 2.475},
|
|
{3.45, -0.15, 2.5125}, {3.45, 0, 2.5125}, {2.8, 0, 2.4},
|
|
{2.8, -0.15, 2.4}, {3.2, -0.15, 2.4}, {3.2, 0, 2.4}, {0, 0,
|
|
3.15}, {0.8, 0, 3.15}, {0.8, -0.45, 3.15}, {0.45, -0.8,
|
|
3.15}, {0, -0.8, 3.15}, {0, 0, 2.85}, {1.4, 0, 2.4}, {1.4,
|
|
-0.784, 2.4}, {0.784, -1.4, 2.4}, {0, -1.4, 2.4}, {0.4, 0,
|
|
2.55}, {0.4, -0.224, 2.55}, {0.224, -0.4, 2.55}, {0, -0.4,
|
|
2.55}, {1.3, 0, 2.55}, {1.3, -0.728, 2.55}, {0.728, -1.3,
|
|
2.55}, {0, -1.3, 2.55}, {1.3, 0, 2.4}, {1.3, -0.728, 2.4},
|
|
{0.728, -1.3, 2.4}, {0, -1.3, 2.4}, {0, 0, 0}, {1.425,
|
|
-0.798, 0}, {1.5, 0, 0.075}, {1.425, 0, 0}, {0.798, -1.425,
|
|
0}, {0, -1.5, 0.075}, {0, -1.425, 0}, {1.5, -0.84, 0.075},
|
|
{0.84, -1.5, 0.075}
|
|
};
|
|
|
|
static float tex[2][2][2] =
|
|
{
|
|
{ {0, 0},
|
|
{1, 0}},
|
|
{ {0, 1},
|
|
{1, 1}}
|
|
};
|
|
|
|
/* *INDENT-ON* */
|
|
|
|
static void
|
|
teapot(GLint grid, GLenum type)
|
|
{
|
|
float p[4][4][3], q[4][4][3], r[4][4][3], s[4][4][3];
|
|
long i, j, k, l;
|
|
|
|
glPushAttrib(GL_ENABLE_BIT | GL_EVAL_BIT);
|
|
glEnable(GL_AUTO_NORMAL);
|
|
glEnable(GL_NORMALIZE);
|
|
glEnable(GL_MAP2_VERTEX_3);
|
|
glEnable(GL_MAP2_TEXTURE_COORD_2);
|
|
for (i = 0; i < 10; i++) {
|
|
for (j = 0; j < 4; j++) {
|
|
for (k = 0; k < 4; k++) {
|
|
for (l = 0; l < 3; l++) {
|
|
p[j][k][l] = cpdata[patchdata[i][j * 4 + k]][l];
|
|
q[j][k][l] = cpdata[patchdata[i][j * 4 + (3 - k)]][l];
|
|
if (l == 1)
|
|
q[j][k][l] *= -1.0;
|
|
if (i < 6) {
|
|
r[j][k][l] =
|
|
cpdata[patchdata[i][j * 4 + (3 - k)]][l];
|
|
if (l == 0)
|
|
r[j][k][l] *= -1.0;
|
|
s[j][k][l] = cpdata[patchdata[i][j * 4 + k]][l];
|
|
if (l == 0)
|
|
s[j][k][l] *= -1.0;
|
|
if (l == 1)
|
|
s[j][k][l] *= -1.0;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
glMap2f(GL_MAP2_TEXTURE_COORD_2, 0, 1, 2, 2, 0, 1, 4, 2,
|
|
&tex[0][0][0]);
|
|
glMap2f(GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4,
|
|
&p[0][0][0]);
|
|
glMapGrid2f(grid, 0.0, 1.0, grid, 0.0, 1.0);
|
|
glEvalMesh2(type, 0, grid, 0, grid);
|
|
glMap2f(GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4,
|
|
&q[0][0][0]);
|
|
glEvalMesh2(type, 0, grid, 0, grid);
|
|
if (i < 6) {
|
|
glMap2f(GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4,
|
|
&r[0][0][0]);
|
|
glEvalMesh2(type, 0, grid, 0, grid);
|
|
glMap2f(GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4,
|
|
&s[0][0][0]);
|
|
glEvalMesh2(type, 0, grid, 0, grid);
|
|
}
|
|
}
|
|
glPopAttrib();
|
|
}
|
|
|
|
|
|
// Now the OSG wrapper for the above OpenGL code, the most complicated bit is computing
|
|
// the bounding box for the above example, normally you'll find this the easy bit.
|
|
class Teapot : public osg::Drawable
|
|
{
|
|
public:
|
|
Teapot() {}
|
|
|
|
/** Copy constructor using CopyOp to manage deep vs shallow copy.*/
|
|
Teapot(const Teapot& teapot,const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY):
|
|
osg::Drawable(teapot,copyop) {}
|
|
|
|
META_Object(myTeapotApp,Teapot)
|
|
|
|
|
|
// the draw immediate mode method is where the OSG wraps up the drawing of
|
|
// of OpenGL primitives.
|
|
virtual void drawImplementation(osg::RenderInfo&) const
|
|
{
|
|
// teapot(..) doesn't use vertex arrays at all so we don't need to toggle their state
|
|
// if we did we'd need to something like following call
|
|
// state.disableAllVertexArrays(), see src/osg/Geometry.cpp for the low down.
|
|
|
|
// just call the OpenGL code.
|
|
teapot(14,GL_FILL);
|
|
}
|
|
|
|
|
|
// we need to set up the bounding box of the data too, so that the scene graph knows where this
|
|
// objects is, for both positioning the camera at start up, and most importantly for culling.
|
|
virtual osg::BoundingBox computeBoundingBox() const
|
|
{
|
|
osg::BoundingBox bbox;
|
|
|
|
// follow is some truly horrible code required to calculate the
|
|
// bounding box of the teapot. Have used the original code above to do
|
|
// help compute it.
|
|
float p[4][4][3], q[4][4][3], r[4][4][3], s[4][4][3];
|
|
long i, j, k, l;
|
|
|
|
for (i = 0; i < 10; i++) {
|
|
for (j = 0; j < 4; j++) {
|
|
for (k = 0; k < 4; k++) {
|
|
|
|
for (l = 0; l < 3; l++) {
|
|
p[j][k][l] = cpdata[patchdata[i][j * 4 + k]][l];
|
|
q[j][k][l] = cpdata[patchdata[i][j * 4 + (3 - k)]][l];
|
|
if (l == 1)
|
|
q[j][k][l] *= -1.0;
|
|
|
|
if (i < 6) {
|
|
r[j][k][l] =
|
|
cpdata[patchdata[i][j * 4 + (3 - k)]][l];
|
|
if (l == 0)
|
|
r[j][k][l] *= -1.0;
|
|
s[j][k][l] = cpdata[patchdata[i][j * 4 + k]][l];
|
|
if (l == 0)
|
|
s[j][k][l] *= -1.0;
|
|
if (l == 1)
|
|
s[j][k][l] *= -1.0;
|
|
}
|
|
}
|
|
|
|
bbox.expandBy(osg::Vec3(p[j][k][0],p[j][k][1],p[j][k][2]));
|
|
bbox.expandBy(osg::Vec3(q[j][k][0],q[j][k][1],q[j][k][2]));
|
|
|
|
if (i < 6)
|
|
{
|
|
bbox.expandBy(osg::Vec3(r[j][k][0],r[j][k][1],r[j][k][2]));
|
|
bbox.expandBy(osg::Vec3(s[j][k][0],s[j][k][1],s[j][k][2]));
|
|
}
|
|
|
|
|
|
}
|
|
}
|
|
}
|
|
|
|
return bbox;
|
|
}
|
|
|
|
protected:
|
|
|
|
virtual ~Teapot() {}
|
|
|
|
};
|
|
|
|
|
|
osg::Geode* createTeapot()
|
|
{
|
|
osg::Geode* geode = new osg::Geode();
|
|
|
|
// add the teapot to the geode.
|
|
geode->addDrawable( new Teapot );
|
|
|
|
// add a reflection map to the teapot.
|
|
osg::ref_ptr<osg::Image> image = osgDB::readRefImageFile("Images/reflect.rgb");
|
|
if (image)
|
|
{
|
|
osg::Texture2D* texture = new osg::Texture2D;
|
|
texture->setImage(image);
|
|
|
|
osg::TexGen* texgen = new osg::TexGen;
|
|
texgen->setMode(osg::TexGen::SPHERE_MAP);
|
|
|
|
osg::StateSet* stateset = new osg::StateSet;
|
|
stateset->setTextureAttributeAndModes(0,texture,osg::StateAttribute::ON);
|
|
stateset->setTextureAttributeAndModes(0,texgen,osg::StateAttribute::ON);
|
|
|
|
geode->setStateSet(stateset);
|
|
}
|
|
|
|
return geode;
|
|
}
|
|
|
|
int main(int , char **)
|
|
{
|
|
#if 1
|
|
|
|
// create viewer on heap as a test, this looks to be causing problems
|
|
// on init on some platforms, and seg fault on exit when multi-threading on linux.
|
|
// Normal stack based version below works fine though...
|
|
|
|
// construct the viewer.
|
|
osg::ref_ptr<osgViewer::Viewer> viewer = new osgViewer::Viewer;
|
|
|
|
// add model to viewer.
|
|
viewer->setSceneData( createTeapot() );
|
|
|
|
osgXR::setupViewerDefaults(viewer, "osgteaport", 1);
|
|
|
|
return viewer->run();
|
|
|
|
#else
|
|
|
|
// construct the viewer.
|
|
osgViewer::Viewer viewer;
|
|
|
|
// add model to viewer.
|
|
viewer.setSceneData( createTeapot() );
|
|
|
|
// create the windows and run the threads.
|
|
return viewer.run();
|
|
#endif
|
|
|
|
}
|