public static Matrix4 GetProjectionMatrix(this ViewPort viewPort, double width, double height, ProjectionStyle projectionStyle)
{
// create transform
Matrix4 transform;
switch (projectionStyle)
{
case ProjectionStyle.OriginTopLeft:
transform = viewPort.GetTransformationMatrixWindowsStyle(width, height);
break;
case ProjectionStyle.OriginBottomLeft:
transform = viewPort.GetTransformationMatrixCartesianStyle(width, height);
break;
case ProjectionStyle.OriginCenter:
transform = viewPort.GetTransformationMatrixDirect3DStyle(width, height);
break;
default:
throw new NotSupportedException();
}
return(transform);
}
public static IEnumerable <ProjectedEntity> ProjectTo2D(Drawing drawing, ViewPort viewPort, double width, double height, ProjectionStyle projectionStyle)
{
// create transform
Matrix4 transform;
switch (projectionStyle)
{
case ProjectionStyle.OriginTopLeft:
transform = viewPort.GetTransformationMatrixWindowsStyle(width, height);
break;
case ProjectionStyle.OriginBottomLeft:
transform = viewPort.GetTransformationMatrixCartesianStyle(width, height);
break;
case ProjectionStyle.OriginCenter:
transform = viewPort.GetTransformationMatrixDirect3DStyle(width, height);
break;
default:
throw new NotSupportedException();
}
// project all entities
var entities = new List <ProjectedEntity>();
foreach (var layer in from l in drawing.GetLayers()
where l.EntityCount > 0
orderby l.Name
select l)
{
foreach (var entity in layer.GetEntities().OrderBy(x => x.Id))
{
var projected = Project(entity, layer, transform);
if (projected != null)
{
entities.Add(projected);
}
}
}
return(entities);
}