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/*
*
* Copyright (C) 2000 Silicon Graphics, Inc. All Rights Reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* Further, this software is distributed without any warranty that it is
* free of the rightful claim of any third person regarding infringement
* or the like. Any license provided herein, whether implied or
* otherwise, applies only to this software file. Patent licenses, if
* any, provided herein do not apply to combinations of this program with
* other software, or any other product whatsoever.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
* Mountain View, CA 94043, or:
*
* http://www.sgi.com
*
* For further information regarding this notice, see:
*
* http://oss.sgi.com/projects/GenInfo/NoticeExplan/
*
*/
// -*- C++ -*-
/*
* Copyright (C) 1990,91 Silicon Graphics, Inc.
*
_______________________________________________________________________
______________ S I L I C O N G R A P H I C S I N C . ____________
|
| $Revision: 1.1.1.1 $
|
| Description:
| This file defines the SoCone node class.
|
| Author(s) : Paul S. Strauss, Nick Thompson
|
______________ S I L I C O N G R A P H I C S I N C . ____________
_______________________________________________________________________
*/
#ifndef _SO_CONE_
#define _SO_CONE_
#include <Inventor/SbLinear.h>
#include <Inventor/fields/SoSFBitMask.h>
#include <Inventor/fields/SoSFFloat.h>
#include <Inventor/nodes/SoShape.h>
//////////////////////////////////////////////////////////////////////////////
//
// Class: SoCone
//
// Simple cone, aligned with y-axis. Default has apex point at y = 1,
// bottom radius 1, and height 2, so that the size is -1 to +1 in all
// 3 dimensions. There are two parts to the cone: the sides and the
// bottom face (in that order).
//
//////////////////////////////////////////////////////////////////////////////
// C-api: public=parts, bottomRadius, height
class SoCone : public SoShape {
SO_NODE_HEADER(SoCone);
public:
enum Part { // Cone parts:
SIDES = 0x01, // The conical part
BOTTOM = 0x02, // The bottom circular face
ALL = 0x03 // All parts
};
// Fields
SoSFBitMask parts; // Visible parts of cone
SoSFFloat bottomRadius; // Radius of bottom circular face
SoSFFloat height; // Size in y dimension
// Constructor
SoCone();
// Turns on/off a part of the cone. (Convenience functions)
void addPart(SoCone::Part part);
void removePart(SoCone::Part part);
// Returns whether a given part is on or off. (Convenience function)
SbBool hasPart(SoCone::Part part) const;
SoEXTENDER public:
// Implements actions
virtual void GLRender(SoGLRenderAction *action);
virtual void rayPick(SoRayPickAction *action);
SoINTERNAL public:
static void initClass();
protected:
// Generates triangles representing a cone
virtual void generatePrimitives(SoAction *action);
// Computes bounding box of cone
virtual void computeBBox(SoAction *action, SbBox3f &box,
SbVec3f ¢er);
virtual ~SoCone();
private:
static SbVec2f *coordsArray; // Storage for base coords
static SbVec3f *normalsArray; // Storage for base normals
static int maxCoords; // Current max num of coords/normals
// Computes number of sides and sections to use to represent
// cone (based on complexity), then computes ring of x,z
// coordinates around base of cone and stores in baseCoords. It
// computes and stores normals in sideNormals, too.
void computeBase(SoAction *action,
int &numSides, int &numSections,
SbVec2f *&baseCoords,
SbVec3f *&sideNormals) const;
// Computes real radius and half-height
void getSize(float &rad, float &hHeight) const;
// These render the cone
void GLRenderGeneric(SoGLRenderAction *action,
SbBool sendNormals, SbBool doTextures);
void GLRenderNvertTnone(SoGLRenderAction *action);
// Computes intersection of ray with infinite canonical cone
SbBool intersectInfiniteCone(const SbLine &ray,
SbVec3f &enterPoint,
SbVec3f &exitPoint) const;
};
// C-api: begin
#endif /* _SO_CONE_ */
|
