private void buttonOpen_Click( object sender, EventArgs e )
{
OpenFileDialog ofd = new OpenFileDialog();
ofd.Title = "Open Scene File";
ofd.Filter = "Wavefront OBJ Files|*.obj" +
"|All scene types|*.obj";
ofd.FilterIndex = 1;
ofd.FileName = "";
if ( ofd.ShowDialog() != DialogResult.OK )
return;
WavefrontObj objReader = new WavefrontObj();
objReader.MirrorConversion = false;
StreamReader reader = new StreamReader( new FileStream( ofd.FileName, FileMode.Open ) );
int faces = objReader.ReadBrep( reader, scene );
reader.Close();
scene.BuildCornerTable();
int errors = scene.CheckCornerTable( null );
labelFaces.Text = String.Format( "{0} faces, {1} errors", faces, errors );
PrepareDataBuffers();
glControl1.Invalidate();
}
/// <summary>
/// Generic OBJ-loading scene definition routine.
/// </summary>
/// <param name="dir">Viewing direction of a camera.</param>
/// <param name="FoVy">Field of View in degrees.</param>
/// <param name="correction">Value less than 1.0 brings camera nearer.</param>
/// <param name="name">OBJ file-name.</param>
/// <param name="names">Substitute file-name[s].</param>
/// <returns>Number of triangles.</returns>
protected static long SceneObj( IRayScene sc, Vector3d dir, double FoVy, double correction, string name, string[] names, double[] surfaceColor )
{
Debug.Assert( sc != null );
Vector3 center = Vector3.Zero; // center of the mesh
dir.Normalize(); // normalized viewing vector of the camera
float diameter = 2.0f; // default scene diameter
int faces = 0;
// CSG scene:
CSGInnerNode root = new CSGInnerNode( SetOperation.Union );
// OBJ file to read:
if ( names.Length == 0 ||
names[ 0 ].Length == 0 )
names = new string[] { name };
string[] paths = Scenes.SmartFindFiles( names );
if ( paths[ 0 ] == null || paths[ 0 ].Length == 0 )
{
for ( int i = 0; i < names.Length; i++ )
if ( names[ i ].Length > 0 )
names[ i ] += ".gz";
paths = Scenes.SmartFindFiles( names );
}
if ( paths[ 0 ] == null || paths[ 0 ].Length == 0 )
root.InsertChild( new Sphere(), Matrix4d.Identity );
else
{
// B-rep scene construction:
WavefrontObj objReader = new WavefrontObj();
objReader.MirrorConversion = false;
SceneBrep brep = new SceneBrep();
faces = objReader.ReadBrep( paths[ 0 ], brep );
brep.BuildCornerTable();
diameter = brep.GetDiameter( out center );
TriangleMesh m = new TriangleMesh( brep );
root.InsertChild( m, Matrix4d.Identity );
}
root.SetAttribute( PropertyName.REFLECTANCE_MODEL, new PhongModel() );
root.SetAttribute( PropertyName.MATERIAL, new PhongMaterial( surfaceColor, 0.2, 0.5, 0.4, 32 ) );
root.SetAttribute( PropertyName.COLOR, surfaceColor );
sc.Intersectable = root;
// Background color:
sc.BackgroundColor = new double[] { 0.0, 0.05, 0.07 };
// Camera:
double dist = (0.5 * diameter * correction) / Math.Tan( MathHelper.DegreesToRadians( (float)(0.5 * FoVy) ) );
Vector3d cam = (Vector3d)center - dist * dir;
sc.Camera = new StaticCamera( cam, dir, FoVy );
// Light sources:
sc.Sources = new LinkedList<ILightSource>();
sc.Sources.Add( new AmbientLightSource( 0.8 ) );
Vector3d lightDir = Vector3d.TransformVector( dir, Matrix4d.CreateRotationY( -2.0 ) );
lightDir = Vector3d.TransformVector( lightDir, Matrix4d.CreateRotationZ( -0.8 ) );
sc.Sources.Add( new PointLightSource( (Vector3d)center + diameter * lightDir, 1.0 ) );
return faces;
}
private void buttonSaveOBJ_Click( object sender, EventArgs e )
{
if ( scene == null || scene.Triangles < 1 ) return;
SaveFileDialog sfd = new SaveFileDialog();
sfd.Title = "Save OBJ file";
sfd.Filter = "OBJ Files|*.obj";
sfd.AddExtension = true;
sfd.FileName = "";
if ( sfd.ShowDialog() != DialogResult.OK )
return;
WavefrontObj objWriter = new WavefrontObj();
objWriter.MirrorConversion = true;
StreamWriter writer = new StreamWriter( new FileStream( sfd.FileName, FileMode.Create ) );
objWriter.WriteBrep( writer, scene );
writer.Close();
}
