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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. *
* *
****************************************************************************/
/****************************************************************************
Histoy
****************************************************************************/
#ifndef __VCG_GLADDONS
#define __VCG_GLADDONS
#include <GL/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:
///used to find right trasformation in case of rotation
static void XAxis( vcg::Point3f zero, vcg::Point3f uno, Matrix44f & tr){
tr.SetZero();
*((vcg::Point3f*)&tr[0][0]) = uno-zero;
GetUV(*((vcg::Point3f*)tr[0]),*((vcg::Point3f*)tr[1]),*((vcg::Point3f*)tr[2]));
tr[3][3] = 1.0;
*((vcg::Point3f*)&tr[3][0]) = zero;
}
//set drawingmode parameters
static void SetGLParameters(DrawMode DM)
{
switch(DM)
{
case DMUser :
break;
case DMWire :
glDisable(GL_CULL_FACE);
glDisable(GL_LIGHTING);
glDisable(GL_NORMALIZE);
glPolygonMode(GL_FRONT_AND_BACK,GL_LINE);
break;
case DMSolid :
glDisable(GL_CULL_FACE);
glPolygonMode(GL_FRONT,GL_FILL);
break;
default :
break;
}
}
///draw a cylinder
static void Cylinder(int slices,float lenght,float width,bool useDisplList)
{
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)
{
if (it!=Disp_listMap.end())///the list exist
cyl_List=it->second;
else to_insert=true;
}
glScaled(lenght,width,width);
if (((!glIsList(cyl_List))&&(useDisplList))||(!useDisplList))
{
if (useDisplList)
{
cyl_List = glGenLists(1);
glNewList(cyl_List, GL_COMPILE);
}
int b;
vcg::Point3f p0;
vcg::Point3f p1;
float step=6.28/(float)slices;
float angle=0;
glBegin(GL_TRIANGLE_STRIP);
for(b = 0; b <= slices-1; ++b){
p0 = vcg::Point3f( 0, sin(angle),cos(angle));
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;
}
///re-conjunction with first point of cylinder
glNormal3f(0,0,1);
glVertex3d(0,0,1);
glVertex3d(1,0,1);
glEnd();
///fill the cylinder down
angle=0;
p0=vcg::Point3f(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 = Point3f( 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::Point3f(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 = Point3f( 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();
}
if (useDisplList)
{
glCallList(cyl_List);
///I insert key and value in the map if I need
if (to_insert)
Disp_listMap.insert(std::pair<int,GLint>(slices,cyl_List));
}
}
public:
static void Diamond (float radius,bool useDisplList)
{
static GLint diam_List=-1;
glScaled(radius,radius,radius);
if (((!glIsList(diam_List))&&(useDisplList))||(!useDisplList))
{
if (useDisplList)
{
diam_List = glGenLists(1);
glNewList(diam_List, GL_COMPILE);
}
glBegin(GL_TRIANGLE_FAN);
glNormal3f( 0.0, 1, 0.0);
glVertex3f(0.0,1,0.0);
glNormal3f( 1, 0.0, 0.0);
glVertex3f( 1, 0.0, 0.0);
glNormal3f( 0.0, 0.0, -1);
glVertex3f( 0.0, 0.0,-1);
glNormal3f(-1, 0.0 , 0.0);
glVertex3f(-1, 0.0, 0.0);
glNormal3f( 0.0, 0.0, 1);
glVertex3f( 0.0, 0.0, 1);
glNormal3f( 1, 0.0, 0.0);
glVertex3f( 1, 0.0, 0.0);
glEnd();
glBegin(GL_TRIANGLE_FAN);
glNormal3f( 0.0, 1, 0.0);
glVertex3f( 0.0,-1, 0.0);
glNormal3f( 1, 0.0, 0.0);
glVertex3f( 1, 0.0, 0.0);
glNormal3f( 0.0, 0.0, 1);
glVertex3f( 0.0, 0.0, 1);
glNormal3f(-1,0.0 , 0.0);
glVertex3f(-1, 0.0, 0.0);
glNormal3f( 0.0,0.0, -1);
glVertex3f( 0.0, 0.0,-1);
glNormal3f( 1, 0.0, 0.0);
glVertex3f( 1, 0.0, 0.0);
glEnd();
if (useDisplList)
glEndList();
}
if (useDisplList)
glCallList(diam_List);
}
///draw a cone
static void Cone(int slices,float lenght,float width,bool useDisplList)
{
assert(!glGetError());
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;
if (useDisplList)
{
if (it!=Disp_listMap.end())///the list exist
cone_List=it->second;
else to_insert=true;
}
glScaled(lenght,width,width);
assert(!glGetError());
if (((!glIsList(cone_List))&&(useDisplList))||(!useDisplList))
{
int h=1;
vcg::Point3f p0;
vcg::Point3f P[2];
vcg::Point3f N[2];
assert(!glGetError());
glScaled(lenght,width,width);
if (useDisplList)
{
cone_List = glGenLists(1);
glNewList(cone_List, GL_COMPILE);
}
for(h=0; h < 2; ++h)
{
assert(!glGetError());
//glBegin(GL_TRIANGLE_FAN);
p0 = Point3f(0,0,0);
if(h==0) p0[0]+=1.f;
//glNormal3f(1,0.0,0.0);
//glVertex3d(p0[0],p0[1],p0[2]);
N[0]= Point3f( 1.f,sinf(0),cosf(0) );
P[0]= Point3f( 0,sinf(0),cosf(0));
int b;
for(b = 1; b <= slices; ++b)
{
float angle = -6.28*b/(float)slices;
if (b==slices) angle=0;
N[1] = Point3f( 1.f, sinf(angle), cosf(angle) );
P[1] = Point3f( 0, sinf(angle), cosf(angle));
assert(!glGetError());
glBegin(GL_TRIANGLES);
Point3f n = ( (P[0]-p0) ^ (P[2]-p0) ).Normalize();
glNormal3f(n[0],n[1],n[2]);
glVertex3f(p0[0],p0[1],p0[2]);
glNormal3f(N[0][0],N[0][1],N[0][2]);
glVertex3f(P[0][0],P[0][1],P[0][2]);
glNormal3f(N[1][0],N[1][1],N[1][2]);
glVertex3f(P[1][0],P[1][1],P[1][2]);
glEnd();
assert(!glGetError());
N[0] = N[1];
P[0] = P[1];
}
//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));
}
}
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(Point3f tail, Point3f head,float body_width,float head_lenght,
float head_width,int body_slice=10,int head_slice=10,bool useDisplList=true)
{
if (tail!=head)
{
//assert(!glGetError());
Matrix44f tr;
XAxis(tail,head,tr);
glPushAttrib(GL_ALL_ATTRIB_BITS);
SetGLParameters(dm);
glPushMatrix();
glMultMatrixf(&tr[0][0]);
vcg::Point3f Direct=(head-tail);
float l_body=Direct.Norm()-head_lenght;
glPushMatrix();
glTranslate(vcg::Point3f(tail.Norm(),0,0));
Cylinder(body_slice,l_body,body_width,useDisplList);
glPopMatrix();
glTranslate(vcg::Point3f(l_body,0,0));
Cone(head_slice,head_lenght,head_width,useDisplList);
glPopMatrix();
//assert(!glGetError());
glPopAttrib();
//assert(!glGetError());
}
}
/// 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(Point3f tail, Point3f head,float width,int slice=10,bool useDisplList=true)
{
if (tail!=head)
{
Matrix44d tr;
XAxis(tail,head,tr);
glPushAttrib(GL_ALL_ATTRIB_BITS);
SetGLParameters(dm);
glPushMatrix();
glMultMatrixf(&tr[0][0]);
vcg::Point3f Direct=(head-tail);
float l_body=Direct.Norm();
glTranslate(vcg::Point3f(tail.Norm(),0,0));
Cone(slice,l_body,width,useDisplList);
glPopMatrix();
glPopAttrib();
}
}
/// 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(Point3f tail, Point3f head,float width,int slice=10,bool useDisplList=true)
{
if (tail!=head)
{
Matrix44f tr;
XAxis(tail,head,tr);
glPushAttrib(GL_ALL_ATTRIB_BITS);
SetGLParameters(dm);
glPushMatrix();
glMultMatrixf(&tr[0][0]);
vcg::Point3f Direct=(head-tail);
float l_body=Direct.Norm();
glTranslate(vcg::Point3f(tail.Norm(),0,0));
Cylinder(slice,l_body,width,useDisplList);
glPopMatrix();
glPopAttrib();
}
}
/// 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)
{
if (size!=0){
glPushMatrix();
glTranslate(Center);
if (dm==DMWire)
glutWireSphere(size,slices,stacks);
else
if (dm==DMSolid)
glutSolidSphere(size,slices,stacks);
else
glutSolidSphere(size,slices,stacks);
glPopMatrix();
}
}
/// 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 glDiamond (Point3f Center, float size,bool useDisplList=true)
{
if (size!=0){
glPushAttrib(GL_ALL_ATTRIB_BITS);
SetGLParameters(dm);
glPushMatrix();
glTranslated(Center[0],Center[1],Center[2]);
Diamond(size,useDisplList);
glPopMatrix();
glPopAttrib();
}
}
};
}
#endif
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