vcglib/wrap/gl/addons.h

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/****************************************************************************
* VCGLib o o *
* Visual and Computer Graphics Library o o *
* _ O _ *
* Copyright(C) 2004 \/)\/ *
* Visual Computing Lab /\/| *
* ISTI - Italian National Research Council | *
* \ *
* All rights reserved. *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program 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 General Public License (http://www.gnu.org/licenses/gpl.txt) *
* for more details. *
* *
****************************************************************************/
/****************************************************************************
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Histoy
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****************************************************************************/
#ifndef __VCG_GLADDONS
#define __VCG_GLADDONS
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#include <glut.h>
#include <wrap/gl/math.h>
#include <wrap/gl/space.h>
#include <vcg/space/point3.h>
#include <map>
namespace vcg
{
/** Class Add_Ons.
This is class draw 3d icons on the screen
*/
class Add_Ons
{
public:
enum DrawMode {DMUser,DMWire,DMSolid} ;
private:
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///used to find right trasformation in case of rotation
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static void XAxis( Point3d zero, Point3d uno, Matrix44d & tr){
tr.SetZero();
*((Point3d*)&tr[0][0]) = uno-zero;
GetUV(*((Point3d*)tr[0]),*((Point3d*)tr[1]),*((Point3d*)tr[2]));
tr[3][3] = 1.0;
*((Point3d*)&tr[3][0]) = zero;
}
//set drawingmode parameters
static void SetGLParameters(DrawMode DM)
{
switch(DM)
{
case DMUser :
break;
case DMWire :
glDisable(GL_CULL_FACE);
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glDisable(GL_LIGHTING);
glDisable(GL_NORMALIZE);
glPolygonMode(GL_FRONT_AND_BACK,GL_LINE);
break;
case DMSolid :
glDisable(GL_CULL_FACE);
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glPolygonMode(GL_FRONT,GL_FILL);
break;
default :
break;
}
}
///draw a cylinder
static void Cylinder(int slices,double lenght,double width,bool useDisplList)
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{
static std::map<int,GLint> Disp_listMap;
GLint cyl_List=-1;
std::map<int,GLint>::const_iterator it=Disp_listMap.find(slices);
///if the diplay list is createdtake the Glint that identify it
bool to_insert=false;
if (useDisplList)
{
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if (it!=Disp_listMap.end())///the list exist
cyl_List=it->second;
else to_insert=true;
}
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glScaled(lenght,width,width);
if (((!glIsList(cyl_List))&&(useDisplList))||(!useDisplList))
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{
if (useDisplList)
{
cyl_List = glGenLists(1);
glNewList(cyl_List, GL_COMPILE);
}
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int b;
vcg::Point3d p0;
vcg::Point3d p1;
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double step=6.28/(double)slices;
double angle=0;
glBegin(GL_TRIANGLE_STRIP);
for(b = 0; b <= slices-1; ++b){
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//double angle = 6.28*b/(double)lenght;
//double angle = 6.28*(double)b;
//angle+=step;
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//p0 = Point3d( 0, width * sin(angle),width * cos(angle));
p0 = Point3d( 0, sin(angle),cos(angle));
//p1 = p0; p1[0] = lenght;
p1 = p0; p1[0] = 1.f;
glNormal3f(p0[0],p0[1],p0[2]);
glVertex3d(p0[0],p0[1],p0[2]);
glVertex3d(p1[0],p1[1],p1[2]);
angle+=step;
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}
///re-conjunction with first point of cylinder
glNormal3f(0,0,1);
glVertex3d(0,0,1);
glVertex3d(1,0,1);
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glEnd();
///fill the cylinder down
angle=0;
p0=vcg::Point3d(0,0,0);
glBegin(GL_TRIANGLE_FAN);
glNormal3f(-1,0,0);
glVertex3d(p0[0],p0[1],p0[2]);
for(b = 0; b <= slices-1; ++b){
glNormal3f(-1,0,0);
p1 = Point3d( 0, sin(angle),cos(angle));
glVertex3d(p1[0],p1[1],p1[2]);
angle+=step;
}
glNormal3f(-1,0,0);
glVertex3d(0,0,1);
glEnd();
angle=0;
p0=vcg::Point3d(1,0,0);
glBegin(GL_TRIANGLE_FAN);
glNormal3f(1,0,0);
glVertex3d(p0[0],p0[1],p0[2]);
for(b = 0; b <= slices-1; ++b){
glNormal3f(1,0,0);
p1 = Point3d( 1, sin(angle),cos(angle));
glVertex3d(p1[0],p1[1],p1[2]);
angle+=step;
}
glNormal3f(1,0,0);
glVertex3d(1,0,1);
glEnd();
if (useDisplList)
glEndList();
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}
if (useDisplList)
{
glCallList(cyl_List);
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///I insert key and value in the map if I need
if (to_insert)
Disp_listMap.insert(std::pair<int,GLint>(slices,cyl_List));
}
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}
static void Diamond (double radius,bool useDisplList)
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{
static GLint diam_List=-1;
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glScaled(radius,radius,radius);
if (((!glIsList(diam_List))&&(useDisplList))||(!useDisplList))
{
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if (useDisplList)
{
diam_List = glGenLists(1);
glNewList(diam_List, GL_COMPILE);
}
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glBegin(GL_TRIANGLE_FAN);
glNormal3f( 0.0, 1, 0.0);
glVertex3f(0.0,1,0.0);
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glNormal3f( 1, 0.0, 0.0);
glVertex3f( 1, 0.0, 0.0);
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glNormal3f( 0.0, 0.0, -1);
glVertex3f( 0.0, 0.0,-1);
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glNormal3f(-1, 0.0 , 0.0);
glVertex3f(-1, 0.0, 0.0);
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glNormal3f( 0.0, 0.0, 1);
glVertex3f( 0.0, 0.0, 1);
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glNormal3f( 1, 0.0, 0.0);
glVertex3f( 1, 0.0, 0.0);
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glEnd();
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glBegin(GL_TRIANGLE_FAN);
glNormal3f( 0.0, 1, 0.0);
glVertex3f( 0.0,-1, 0.0);
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glNormal3f( 1, 0.0, 0.0);
glVertex3f( 1, 0.0, 0.0);
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glNormal3f( 0.0, 0.0, 1);
glVertex3f( 0.0, 0.0, 1);
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glNormal3f(-1,0.0 , 0.0);
glVertex3f(-1, 0.0, 0.0);
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glNormal3f( 0.0,0.0, -1);
glVertex3f( 0.0, 0.0,-1);
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glNormal3f( 1, 0.0, 0.0);
glVertex3f( 1, 0.0, 0.0);
glEnd();
if (useDisplList)
glEndList();
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}
if (useDisplList)
glCallList(diam_List);
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}
///draw a cone
static void Cone(int slices,double lenght,double width,bool useDisplList)
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{
static std::map<int,GLint> Disp_listMap;
GLint cone_List=-1;
std::map<int,GLint>::const_iterator it=Disp_listMap.find(slices);
///if the diplay list is createdtake the Glint that identify it
bool to_insert=false;
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if (useDisplList)
{
if (it!=Disp_listMap.end())///the list exist
cone_List=it->second;
else to_insert=true;
}
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glScaled(lenght,width,width);
if (((!glIsList(cone_List))&&(useDisplList))||(!useDisplList))
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{
int h;
vcg::Point3d p0;
glScaled(lenght,width,width);
if (useDisplList)
{
cone_List = glGenLists(1);
glNewList(cone_List, GL_COMPILE);
}
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for(h=0; h < 2; ++h){
glBegin(GL_TRIANGLE_FAN);
p0 = Point3d(0,0,0);
if(h==0)
//p0[0]+=lenght;
p0[0]+=1.f;
glNormal3f(1,0.0,0.0);
glVertex3d(p0[0],p0[1],p0[2]);
int b;
for(b = 0; b <= slices; ++b){
double angle = -6.28*b/(double)slices;
//double ratio= lenght/width;
//Point3d N0( ratio,ratio*sin(angle),ratio* cos(angle) );
Point3d N0( 1.f,sin(angle),cos(angle) );
glNormal3f(N0[0],N0[1],N0[2]);
//p0 = Point3d( 0, width * sin(angle),width * cos(angle));
p0 = Point3d( 0,sin(angle),cos(angle));
glVertex3d(p0[0],p0[1],p0[2]);
}
glEnd();
}
if (useDisplList)
glEndList();
}
if (useDisplList)
{
glCallList(cone_List);
///I insert key and value in the map if I need
if (to_insert)
Disp_listMap.insert(std::pair<int,GLint>(slices,cone_List));
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}
}
public:
/// draw an arrow from tail to head
/// body_width = width of the body of arrow
/// head_lenght = lenght of the head of arrow
/// head_width = width of the head of arrow
/// body_slice = number of slices on the body
/// head_slice = number of slices on the head
template <DrawMode dm>
static void glArrow(Point3d tail, Point3d head,double body_width,double head_lenght,
double head_width,int body_slice=10,int head_slice=10,bool useDisplList=true)
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{
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if (tail!=head)
{
//assert(!glGetError());
Matrix44d tr;
XAxis(tail,head,tr);
glPushAttrib(GL_ALL_ATTRIB_BITS);
SetGLParameters(dm);
glPushMatrix();
glMultMatrixd(&tr[0][0]);
vcg::Point3d Direct=(head-tail);
double l_body=Direct.Norm()-head_lenght;
glPushMatrix();
glTranslate(vcg::Point3d(tail.Norm(),0,0));
Cylinder(body_slice,l_body,body_width,useDisplList);
glPopMatrix();
glTranslate(vcg::Point3d(l_body,0,0));
Cone(head_slice,head_lenght,head_width,useDisplList);
glPopMatrix();
//assert(!glGetError());
glPopAttrib();
//assert(!glGetError());
}
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}
/// draw a cone from tail to head
/// width = width of the base of the cone
/// slice = number of slices on the cone
template <DrawMode dm>
static void glCone(Point3d tail, Point3d head,double width,int slice=10,bool useDisplList=true)
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{
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if (tail!=head)
{
Matrix44d tr;
XAxis(tail,head,tr);
glPushAttrib(GL_ALL_ATTRIB_BITS);
SetGLParameters(dm);
glPushMatrix();
glMultMatrixd(&tr[0][0]);
vcg::Point3d Direct=(head-tail);
double l_body=Direct.Norm();
glTranslate(vcg::Point3d(tail.Norm(),0,0));
Cone(slice,l_body,width,useDisplList);
glPopMatrix();
glPopAttrib();
}
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}
/// draw a cylinder from tail to head
/// width = width of the base of the cylinder
/// slice = number of slices on the cylinder
template <DrawMode dm>
static void glCylinder(Point3d tail, Point3d head,double width,int slice=10,bool useDisplList=true)
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{
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if (tail!=head)
{
Matrix44d tr;
XAxis(tail,head,tr);
glPushAttrib(GL_ALL_ATTRIB_BITS);
SetGLParameters(dm);
glPushMatrix();
glMultMatrixd(&tr[0][0]);
vcg::Point3d Direct=(head-tail);
double l_body=Direct.Norm();
glTranslate(vcg::Point3d(tail.Norm(),0,0));
Cylinder(slice,l_body,width,useDisplList);
glPopMatrix();
glPopAttrib();
}
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}
/// draw a point in Center
/// size = Radius of the point
/// slices = The number of subdivisions around the Z axis (similar to lines of longitude).
/// stacks = The number of subdivisions along the Z axis (similar to lines of latitude).
template <DrawMode dm>
static void glPoint(vcg::Point3f Center,float size,int slices =16,int stacks =16)
{
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if (size!=0){
glPushMatrix();
glTranslate(Center);
if (dm==DMWire)
glutWireSphere(size,slices,stacks);
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else
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if (dm==DMSolid)
glutSolidSphere(size,slices,stacks);
else
glutSolidSphere(size,slices,stacks);
glPopMatrix();
}
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}
/// draw a point in Center
/// size = Radius of the point
/// slices = The number of subdivisions around the Z axis (similar to lines of longitude).
/// stacks = The number of subdivisions along the Z axis (similar to lines of latitude).
template <DrawMode dm>
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static void glDiamond (Point3f Center, double size,bool useDisplList=true)
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{
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if (size!=0){
glPushAttrib(GL_ALL_ATTRIB_BITS);
SetGLParameters(dm);
glPushMatrix();
glTranslated(Center[0],Center[1],Center[2]);
Diamond(size,useDisplList);
glPopMatrix();
glPopAttrib();
}
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}
};
}
#endif