Pages: 1

 

#0 

22-03-2012 20:52:03

johnplayer
Habitué
Date d'inscription: 30-09-2007
Messages: 431

Voilà, pour mon besoin personnel, j'ai codé une classe qui renvoie un buffer contenant une sphere basé sur un icosaèdre.
Pour l'itération, il faut savoir qu'elle doit être entre 0 et 5 compris. L'itération 0 rend une sphère à 20 triangles et chaque itération multiplie par 4 le nombre de triangles pour arriver à 20480 pour une itération de 5.
Les buffers étant limités à 65536 vertices et les triangles étant tous séparés (3 vertices par triangles, pour des raisons de texturing et manipulations), il est impossible d'aller au-dessus de 5 itérations.
Maintenant, si quelqu'un à des suggestions d'améliorations, qu'il n'hésite pas! Je modifierais le code dès que possible.

SphereIcosa.hSphereIcosa.cppexemple.cpp
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#ifndef SPHEREICOSA_H
#define SPHEREICOSA_H

#include "irrTypes.h"
#include "vector3d.h"
#include "aabbox3d.h"
#include "CMeshBuffer.h"
#include "SMaterial.h"


class SphereIcosa
{
    public:
        SphereIcosa(irr::video::SMaterial material, irr::f32 rayon=1, irr::u8 iterations=0);
        SphereIcosa(irr::f32 rayon=1, irr::u8 iterations=0);
        virtual ~SphereIcosa();

        bool createNewSphere(irr::f32 rayon=1, irr::u8 iterations=0);
        irr::scene::SMeshBuffer* getBufferCopy();
        irr::video::SMaterial& getMaterial();
        void setMaterial(irr::video::SMaterial material);
        irr::core::aabbox3df& getBoundingBox();

    protected:
        irr::f32 Rayon;
        irr::u8 NbIterations;
        irr::scene::SMeshBuffer* Buffer;
        irr::core::aabbox3df BoundingBox;

        void createBoundingBox();

    private:

};

#endif // SPHEREICOSA_H
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#include "SphereIcosa.h"

SphereIcosa::SphereIcosa(irr::video::SMaterial material, irr::f32 rayon, irr::u8 iterations) : Rayon(rayon), NbIterations(iterations)
{
    /// initialisation du buffer
    Buffer = new irr::scene::SMeshBuffer();
    Buffer->Material = material;
    /// créé la sphère
    createNewSphere(rayon, iterations);
}

SphereIcosa::SphereIcosa(irr::f32 rayon, irr::u8 iterations) : Rayon(rayon), NbIterations(iterations)
{
    /// créé la sphère
    createNewSphere(rayon, iterations);
}

SphereIcosa::~SphereIcosa()
{
    /// libère la mémoire
    if(Buffer)
        delete Buffer;
}

bool SphereIcosa::createNewSphere(irr::f32 rayon, irr::u8 iterations)
{
    /// si le nb de vertex dépasse la limite on retourne
    if( iterations > 5 )
        return false;
    /// array contenant les vertices
    irr::core::array<irr::core::vector3df> listevertex;
    /// calcul des termes de base
    irr::core::vector3df normalise(1, ((1+irr::core::squareroot(5.f))/2), 0);
    normalise.setLength(rayon);
    irr::f32 terme1 = normalise.X;
    irr::f32 terme2 = normalise.Y;
    /// calcul des 4 points du plan : XY
    listevertex.push_back( irr::core::vector3df(-terme1,-terme2,0) );
    listevertex.push_back( irr::core::vector3df(-terme1,terme2,0) );
    listevertex.push_back( irr::core::vector3df(terme1,terme2,0) );
    listevertex.push_back( irr::core::vector3df(terme1,-terme2,0) );
    /// calcul des 4 points du plan : YZ
    listevertex.push_back( irr::core::vector3df(0,-terme1,-terme2) );
    listevertex.push_back( irr::core::vector3df(0,terme1,-terme2) );
    listevertex.push_back( irr::core::vector3df(0,terme1,terme2) );
    listevertex.push_back( irr::core::vector3df(0,-terme1,terme2) );
    /// calcul des 4 points du plan : XZ
    listevertex.push_back( irr::core::vector3df(-terme2,0,-terme1) );
    listevertex.push_back( irr::core::vector3df(-terme2,0,terme1) );
    listevertex.push_back( irr::core::vector3df(terme2,0,terme1) );
    listevertex.push_back( irr::core::vector3df(terme2,0,-terme1) );

    /// mise dans le buffer dans la forme première
    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[0], irr::core::vector3df(0), irr::video::SColor(255,000,255,000), irr::core::vector2df(0,0)) );
    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[3], irr::core::vector3df(0), irr::video::SColor(255,000,255,000), irr::core::vector2df(0,1)) );
    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[7], irr::core::vector3df(0), irr::video::SColor(255,000,255,000), irr::core::vector2df(0.5,0.5)) );
    Buffer->Indices.push_back( 0 ); Buffer->Indices.push_back( 1 ); Buffer->Indices.push_back( 2 );

    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[3], irr::core::vector3df(0), irr::video::SColor(255,000,255,000), irr::core::vector2df(0,0)) );
    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[0], irr::core::vector3df(0), irr::video::SColor(255,000,255,000), irr::core::vector2df(0,1)) );
    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[4], irr::core::vector3df(0), irr::video::SColor(255,000,255,000), irr::core::vector2df(0.5,0.5)) );
    Buffer->Indices.push_back( 3 ); Buffer->Indices.push_back( 4 ); Buffer->Indices.push_back( 5 );

    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[2], irr::core::vector3df(0), irr::video::SColor(255,000,255,000), irr::core::vector2df(0,0)) );
    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[1], irr::core::vector3df(0), irr::video::SColor(255,000,255,000), irr::core::vector2df(0,1)) );
    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[6], irr::core::vector3df(0), irr::video::SColor(255,000,255,000), irr::core::vector2df(0.5,0.5)) );
    Buffer->Indices.push_back( 6 ); Buffer->Indices.push_back( 7 ); Buffer->Indices.push_back( 8 );

    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[1], irr::core::vector3df(0), irr::video::SColor(255,000,255,000), irr::core::vector2df(0,0)) );
    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[2], irr::core::vector3df(0), irr::video::SColor(255,000,255,000), irr::core::vector2df(0,1)) );
    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[5], irr::core::vector3df(0), irr::video::SColor(255,000,255,000), irr::core::vector2df(0.5,0.5)) );
    Buffer->Indices.push_back( 9 ); Buffer->Indices.push_back( 10 ); Buffer->Indices.push_back( 11 );



    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[4], irr::core::vector3df(0), irr::video::SColor(255,000,000,255), irr::core::vector2df(0,0)) );
    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[5], irr::core::vector3df(0), irr::video::SColor(255,000,000,255), irr::core::vector2df(0,1)) );
    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[11], irr::core::vector3df(0), irr::video::SColor(255,000,000,255), irr::core::vector2df(0.5,0.5)) );
    Buffer->Indices.push_back( 12 ); Buffer->Indices.push_back( 13 ); Buffer->Indices.push_back( 14 );

    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[5], irr::core::vector3df(0), irr::video::SColor(255,000,000,255), irr::core::vector2df(0,0)) );
    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[4], irr::core::vector3df(0), irr::video::SColor(255,000,000,255), irr::core::vector2df(0,1)) );
    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[8], irr::core::vector3df(0), irr::video::SColor(255,000,000,255), irr::core::vector2df(0.5,0.5)) );
    Buffer->Indices.push_back( 15 ); Buffer->Indices.push_back( 16 ); Buffer->Indices.push_back( 17 );

    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[7], irr::core::vector3df(0), irr::video::SColor(255,000,000,255), irr::core::vector2df(0,0)) );
    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[6], irr::core::vector3df(0), irr::video::SColor(255,000,000,255), irr::core::vector2df(0,1)) );
    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[9], irr::core::vector3df(0), irr::video::SColor(255,000,000,255), irr::core::vector2df(0.5,0.5)) );
    Buffer->Indices.push_back( 18 ); Buffer->Indices.push_back( 19 ); Buffer->Indices.push_back( 20 );

    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[6], irr::core::vector3df(0), irr::video::SColor(255,000,000,255), irr::core::vector2df(0,0)) );
    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[7], irr::core::vector3df(0), irr::video::SColor(255,000,000,255), irr::core::vector2df(0,1)) );
    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[10], irr::core::vector3df(0), irr::video::SColor(255,000,000,255), irr::core::vector2df(0.5,0.5)) );
    Buffer->Indices.push_back( 21 ); Buffer->Indices.push_back( 22 ); Buffer->Indices.push_back( 23 );



    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[9], irr::core::vector3df(0), irr::video::SColor(255,255,000,000), irr::core::vector2df(0,0)) );
    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[8], irr::core::vector3df(0), irr::video::SColor(255,255,000,000), irr::core::vector2df(0,1)) );
    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[0], irr::core::vector3df(0), irr::video::SColor(255,255,000,000), irr::core::vector2df(0.5,0.5)) );
    Buffer->Indices.push_back( 24 ); Buffer->Indices.push_back( 25 ); Buffer->Indices.push_back( 26 );

    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[8], irr::core::vector3df(0), irr::video::SColor(255,255,000,000), irr::core::vector2df(0,0)) );
    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[9], irr::core::vector3df(0), irr::video::SColor(255,255,000,000), irr::core::vector2df(0,1)) );
    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[1], irr::core::vector3df(0), irr::video::SColor(255,255,000,000), irr::core::vector2df(0.5,0.5)) );
    Buffer->Indices.push_back( 27 ); Buffer->Indices.push_back( 28 ); Buffer->Indices.push_back( 29 );

    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[10], irr::core::vector3df(0), irr::video::SColor(255,255,000,000), irr::core::vector2df(0,0)) );
    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[11], irr::core::vector3df(0), irr::video::SColor(255,255,000,000), irr::core::vector2df(0,1)) );
    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[2], irr::core::vector3df(0), irr::video::SColor(255,255,000,000), irr::core::vector2df(0.5,0.5)) );
    Buffer->Indices.push_back( 30 ); Buffer->Indices.push_back( 31 ); Buffer->Indices.push_back( 32 );

    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[11], irr::core::vector3df(0), irr::video::SColor(255,255,000,000), irr::core::vector2df(0,0)) );
    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[10], irr::core::vector3df(0), irr::video::SColor(255,255,000,000), irr::core::vector2df(0,1)) );
    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[3], irr::core::vector3df(0), irr::video::SColor(255,255,000,000), irr::core::vector2df(0.5,0.5)) );
    Buffer->Indices.push_back( 33 ); Buffer->Indices.push_back( 34 ); Buffer->Indices.push_back( 35 );




    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[0], irr::core::vector3df(0), irr::video::SColor(255,200,200,000), irr::core::vector2df(0,0)) );
    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[8], irr::core::vector3df(0), irr::video::SColor(255,200,200,000), irr::core::vector2df(0,1)) );
    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[4], irr::core::vector3df(0), irr::video::SColor(255,200,200,000), irr::core::vector2df(0.5,0.5)) );
    Buffer->Indices.push_back( 36 ); Buffer->Indices.push_back( 37 ); Buffer->Indices.push_back( 38 );

    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[0], irr::core::vector3df(0), irr::video::SColor(255,200,200,000), irr::core::vector2df(0,0)) );
    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[7], irr::core::vector3df(0), irr::video::SColor(255,200,200,000), irr::core::vector2df(0,1)) );
    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[9], irr::core::vector3df(0), irr::video::SColor(255,200,200,000), irr::core::vector2df(0.5,0.5)) );
    Buffer->Indices.push_back( 39 ); Buffer->Indices.push_back( 40 ); Buffer->Indices.push_back( 41 );

    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[1], irr::core::vector3df(0), irr::video::SColor(255,200,200,000), irr::core::vector2df(0,0)) );
    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[5], irr::core::vector3df(0), irr::video::SColor(255,200,200,000), irr::core::vector2df(0,1)) );
    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[8], irr::core::vector3df(0), irr::video::SColor(255,200,200,000), irr::core::vector2df(0.5,0.5)) );
    Buffer->Indices.push_back( 42 ); Buffer->Indices.push_back( 43 ); Buffer->Indices.push_back( 44 );

    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[1], irr::core::vector3df(0), irr::video::SColor(255,200,200,000), irr::core::vector2df(0,0)) );
    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[9], irr::core::vector3df(0), irr::video::SColor(255,200,200,000), irr::core::vector2df(0,1)) );
    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[6], irr::core::vector3df(0), irr::video::SColor(255,200,200,000), irr::core::vector2df(0.5,0.5)) );
    Buffer->Indices.push_back( 45 ); Buffer->Indices.push_back( 46 ); Buffer->Indices.push_back( 47 );

    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[2], irr::core::vector3df(0), irr::video::SColor(255,200,200,000), irr::core::vector2df(0,0)) );
    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[6], irr::core::vector3df(0), irr::video::SColor(255,200,200,000), irr::core::vector2df(0,1)) );
    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[10], irr::core::vector3df(0), irr::video::SColor(255,200,200,000), irr::core::vector2df(0.5,0.5)) );
    Buffer->Indices.push_back( 48 ); Buffer->Indices.push_back( 49 ); Buffer->Indices.push_back( 50 );

    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[2], irr::core::vector3df(0), irr::video::SColor(255,200,200,000), irr::core::vector2df(0,0)) );
    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[11], irr::core::vector3df(0), irr::video::SColor(255,200,200,000), irr::core::vector2df(0,1)) );
    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[5], irr::core::vector3df(0), irr::video::SColor(255,200,200,000), irr::core::vector2df(0.5,0.5)) );
    Buffer->Indices.push_back( 51 ); Buffer->Indices.push_back( 52 ); Buffer->Indices.push_back( 53 );

    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[3], irr::core::vector3df(0), irr::video::SColor(255,200,200,000), irr::core::vector2df(0,0)) );
    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[10], irr::core::vector3df(0), irr::video::SColor(255,200,200,000), irr::core::vector2df(0,1)) );
    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[7], irr::core::vector3df(0), irr::video::SColor(255,200,200,000), irr::core::vector2df(0.5,0.5)) );
    Buffer->Indices.push_back( 54 ); Buffer->Indices.push_back( 55 ); Buffer->Indices.push_back( 56 );

    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[3], irr::core::vector3df(0), irr::video::SColor(255,200,200,000), irr::core::vector2df(0,0)) );
    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[4], irr::core::vector3df(0), irr::video::SColor(255,200,200,000), irr::core::vector2df(0,1)) );
    Buffer->Vertices.push_back( irr::video::S3DVertex( listevertex[11], irr::core::vector3df(0), irr::video::SColor(255,200,200,000), irr::core::vector2df(0.5,0.5)) );
    Buffer->Indices.push_back( 57 ); Buffer->Indices.push_back( 58 ); Buffer->Indices.push_back( 59 );

    for(irr::s32 nbIterations=0; nbIterations < iterations; ++nbIterations )
    {
        /// variables
        irr::core::array<irr::video::S3DVertex> newVertices;
        irr::core::array<irr::u16> newIndices;
        /// créations des couleurs
        irr::video::SColor color1(255,255,000,000);
        irr::video::SColor color2(255,000,255,000);
        irr::video::SColor color3(255,000,000,255);
        irr::video::SColor color4(255,255,255,000);
        /// pour chaque triangles on en créé 4 nouveaux par subdivisions
        for(irr::s32 a=0; a < (irr::s32)Buffer->Indices.size(); a+=3)
        {
            /// on enregistre l'index
            irr::s32 index = (int)newVertices.size();
            /// on enregistre les 3 points existant
            irr::core::vector3df A( Buffer->Vertices[Buffer->Indices[a]].Pos );
            irr::core::vector3df B( Buffer->Vertices[Buffer->Indices[a+1]].Pos );
            irr::core::vector3df C( Buffer->Vertices[Buffer->Indices[a+2]].Pos );
            /// on calcule les 3 nouveaux points
            irr::core::vector3df D( irr::core::line3df(A, B).getMiddle().setLength(rayon) );
            irr::core::vector3df E( irr::core::line3df(B, C).getMiddle().setLength(rayon) );
            irr::core::vector3df F( irr::core::line3df(C, A).getMiddle().setLength(rayon) );
            /// on insère les 4 nouveaux triangles
            /// ADF
            newVertices.push_back( irr::video::S3DVertex( A, irr::core::vector3df(0), color1, irr::core::vector2df(0,0)) );
            newVertices.push_back( irr::video::S3DVertex( D, irr::core::vector3df(0), color1, irr::core::vector2df(0,1)) );
            newVertices.push_back( irr::video::S3DVertex( F, irr::core::vector3df(0), color1, irr::core::vector2df(0.5,0.5)) );
            newIndices.push_back( index ); newIndices.push_back( index+1 ); newIndices.push_back( index+2 );
            /// DBE
            newVertices.push_back( irr::video::S3DVertex( D, irr::core::vector3df(0), color2, irr::core::vector2df(0,0)) );
            newVertices.push_back( irr::video::S3DVertex( B, irr::core::vector3df(0), color2, irr::core::vector2df(0,1)) );
            newVertices.push_back( irr::video::S3DVertex( E, irr::core::vector3df(0), color2, irr::core::vector2df(0.5,0.5)) );
            newIndices.push_back( index+3 ); newIndices.push_back( index+4 ); newIndices.push_back( index+5 );
            /// FDE
            newVertices.push_back( irr::video::S3DVertex( F, irr::core::vector3df(0), color3, irr::core::vector2df(0,0)) );
            newVertices.push_back( irr::video::S3DVertex( D, irr::core::vector3df(0), color3, irr::core::vector2df(0,1)) );
            newVertices.push_back( irr::video::S3DVertex( E, irr::core::vector3df(0), color3, irr::core::vector2df(0.5,0.5)) );
            newIndices.push_back( index+6 ); newIndices.push_back( index+7 ); newIndices.push_back( index+8 );
            /// FEC
            newVertices.push_back( irr::video::S3DVertex( F, irr::core::vector3df(0), color4, irr::core::vector2df(0,0)) );
            newVertices.push_back( irr::video::S3DVertex( E, irr::core::vector3df(0), color4, irr::core::vector2df(0,1)) );
            newVertices.push_back( irr::video::S3DVertex( C, irr::core::vector3df(0), color4, irr::core::vector2df(0.5,0.5)) );
            newIndices.push_back( index+9 ); newIndices.push_back( index+10 ); newIndices.push_back( index+11 );
        }
        Buffer->Vertices = newVertices;
        Buffer->Indices = newIndices;
    }
    /// on mets à jour les paramètres de création de la sphere
    Rayon = rayon;
    NbIterations = iterations;
    /// on met à jour la Bounding Box
    createBoundingBox();
    /// tout s'est bien passé on quitte
    return true;
}

irr::scene::SMeshBuffer* SphereIcosa::getBufferCopy()
{
    irr::scene::SMeshBuffer* tmp = new irr::scene::SMeshBuffer();
    tmp->Material = Buffer->Material;
    tmp->Vertices = Buffer->Vertices;
    tmp->Indices = Buffer->Indices;
    return tmp;
}

irr::video::SMaterial& SphereIcosa::getMaterial()
{
    return Buffer->Material;
}

void SphereIcosa::setMaterial(irr::video::SMaterial material)
{
    Buffer->Material = material;
}

irr::core::aabbox3df& SphereIcosa::getBoundingBox()
{
    return BoundingBox;
}

void SphereIcosa::createBoundingBox()
{
    BoundingBox = irr::core::aabbox3df( irr::core::vector3df(-Rayon), irr::core::vector3df(Rayon) );
}
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SMaterial blanc;
blanc.Lighting = false;
SphereIcosa sphere(blanc, 1000, 5);
SMeshBuffer* SphereBuffer = sphere.getBufferCopy();

// à mettre entre beginscene et endscene
Driver->drawMeshBuffer( SphereBuffer );


core i7 4970K @ 4GHz - 32GB ddr3 19200(2400MHz) - ssd samsung 840 evo 250GB - GTX1080Ti (4K) - Cooler master storm stryker blanc.
"L'alcool, c'est comme Activia, c'est actif à l'intérieur et ça se voit à l'extérieur."

Hors ligne


#1 

22-03-2012 23:07:47

johnplayer
Habitué
Date d'inscription: 30-09-2007
Messages: 431

Voici une autre classe qui elle utilise des index 32 bits. Ceux-ci ne sont pas compatibles avec toutes les cartes graphiques. Niveau perfs 245fps pour une itération 8 soit 1 311 000 triangles sur une GTX590 avec VBO activé.
Par contre pour ma part je ne dépasse pas l'itération 8 car la 9ème plante (environ 5 000 000 de triangles).
Ce n'est pas vraiment génant de ne pouvoir monter que jusqu'à 1 311 000 triagles.^^

Code:

// fichier : SphereIcosaUnlimited.h

#ifndef SPHEREICOSAUNLIMITED_H
#define SPHEREICOSAUNLIMITED_H


#include "irrTypes.h"
#include "vector3d.h"
#include "aabbox3d.h"
#include "CDynamicMeshBuffer.h"
#include "SMaterial.h"


class SphereIcosaUnlimited
{
    public:
        SphereIcosaUnlimited(irr::video::SMaterial material, irr::f32 rayon=1, irr::u16 iterations=0);
        SphereIcosaUnlimited(irr::f32 rayon=1, irr::u16 iterations=0);
        virtual ~SphereIcosaUnlimited();

        bool createNewSphere(irr::f32 rayon=1, irr::u16 iterations=0);
        irr::scene::CDynamicMeshBuffer* getBuffer();
        irr::video::SMaterial& getMaterial();
        void setMaterial(irr::video::SMaterial material);
        irr::core::aabbox3df& getBoundingBox();
        void setUseVBO(irr::scene::E_HARDWARE_MAPPING vbo=irr::scene::EHM_NEVER);

    protected:
        irr::f32 Rayon;
        irr::u8 NbIterations;
        irr::scene::CDynamicMeshBuffer* Buffer;
        irr::core::aabbox3df BoundingBox;

        void createBoundingBox();

    private:

};

#endif // SPHEREICOSAUNLIMITED_H

Code:

// fichier SphereIcosaUnlimited.cpp

#include "SphereIcosaUnlimited.h"

SphereIcosaUnlimited::SphereIcosaUnlimited(irr::video::SMaterial material, irr::f32 rayon, irr::u16 iterations) : Rayon(rayon), NbIterations(iterations)
{
    /// initialisation du buffer
    Buffer = new irr::scene::CDynamicMeshBuffer(irr::video::EVT_STANDARD, irr::video::EIT_32BIT);
    Buffer->Material = material;
    /// créé la sphère
    createNewSphere(rayon, iterations);
}

SphereIcosaUnlimited::SphereIcosaUnlimited(irr::f32 rayon, irr::u16 iterations) : Rayon(rayon), NbIterations(iterations)
{
    /// créé la sphère
    createNewSphere(rayon, iterations);
}

SphereIcosaUnlimited::~SphereIcosaUnlimited()
{
    /// libère la mémoire
}

bool SphereIcosaUnlimited::createNewSphere(irr::f32 rayon, irr::u16 iterations)
{
    /// array contenant les vertices
    irr::core::array<irr::core::vector3df> listevertex;
    /// calcul des termes de base
    irr::core::vector3df normalise(1, ((1+irr::core::squareroot(5.f))/2), 0);
    normalise.setLength(rayon);
    irr::f32 terme1 = normalise.X;
    irr::f32 terme2 = normalise.Y;
    /// calcul des 4 points du plan : XY
    listevertex.push_back( irr::core::vector3df(-terme1,-terme2,0) );
    listevertex.push_back( irr::core::vector3df(-terme1,terme2,0) );
    listevertex.push_back( irr::core::vector3df(terme1,terme2,0) );
    listevertex.push_back( irr::core::vector3df(terme1,-terme2,0) );
    /// calcul des 4 points du plan : YZ
    listevertex.push_back( irr::core::vector3df(0,-terme1,-terme2) );
    listevertex.push_back( irr::core::vector3df(0,terme1,-terme2) );
    listevertex.push_back( irr::core::vector3df(0,terme1,terme2) );
    listevertex.push_back( irr::core::vector3df(0,-terme1,terme2) );
    /// calcul des 4 points du plan : XZ
    listevertex.push_back( irr::core::vector3df(-terme2,0,-terme1) );
    listevertex.push_back( irr::core::vector3df(-terme2,0,terme1) );
    listevertex.push_back( irr::core::vector3df(terme2,0,terme1) );
    listevertex.push_back( irr::core::vector3df(terme2,0,-terme1) );
    /// mise dans le buffer dans la forme première
    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[0], irr::core::vector3df(0), irr::video::SColor(255,000,255,000), irr::core::vector2df(0,0)) );
    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[3], irr::core::vector3df(0), irr::video::SColor(255,000,255,000), irr::core::vector2df(0,1)) );
    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[7], irr::core::vector3df(0), irr::video::SColor(255,000,255,000), irr::core::vector2df(0.5,0.5)) );
    Buffer->getIndexBuffer().push_back( 0 ); Buffer->getIndexBuffer().push_back( 1 ); Buffer->getIndexBuffer().push_back( 2 );

    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[3], irr::core::vector3df(0), irr::video::SColor(255,000,255,000), irr::core::vector2df(0,0)) );
    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[0], irr::core::vector3df(0), irr::video::SColor(255,000,255,000), irr::core::vector2df(0,1)) );
    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[4], irr::core::vector3df(0), irr::video::SColor(255,000,255,000), irr::core::vector2df(0.5,0.5)) );
    Buffer->getIndexBuffer().push_back( 3 ); Buffer->getIndexBuffer().push_back( 4 ); Buffer->getIndexBuffer().push_back( 5 );

    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[2], irr::core::vector3df(0), irr::video::SColor(255,000,255,000), irr::core::vector2df(0,0)) );
    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[1], irr::core::vector3df(0), irr::video::SColor(255,000,255,000), irr::core::vector2df(0,1)) );
    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[6], irr::core::vector3df(0), irr::video::SColor(255,000,255,000), irr::core::vector2df(0.5,0.5)) );
    Buffer->getIndexBuffer().push_back( 6 ); Buffer->getIndexBuffer().push_back( 7 ); Buffer->getIndexBuffer().push_back( 8 );

    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[1], irr::core::vector3df(0), irr::video::SColor(255,000,255,000), irr::core::vector2df(0,0)) );
    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[2], irr::core::vector3df(0), irr::video::SColor(255,000,255,000), irr::core::vector2df(0,1)) );
    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[5], irr::core::vector3df(0), irr::video::SColor(255,000,255,000), irr::core::vector2df(0.5,0.5)) );
    Buffer->getIndexBuffer().push_back( 9 ); Buffer->getIndexBuffer().push_back( 10 ); Buffer->getIndexBuffer().push_back( 11 );



    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[4], irr::core::vector3df(0), irr::video::SColor(255,000,000,255), irr::core::vector2df(0,0)) );
    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[5], irr::core::vector3df(0), irr::video::SColor(255,000,000,255), irr::core::vector2df(0,1)) );
    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[11], irr::core::vector3df(0), irr::video::SColor(255,000,000,255), irr::core::vector2df(0.5,0.5)) );
    Buffer->getIndexBuffer().push_back( 12 ); Buffer->getIndexBuffer().push_back( 13 ); Buffer->getIndexBuffer().push_back( 14 );

    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[5], irr::core::vector3df(0), irr::video::SColor(255,000,000,255), irr::core::vector2df(0,0)) );
    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[4], irr::core::vector3df(0), irr::video::SColor(255,000,000,255), irr::core::vector2df(0,1)) );
    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[8], irr::core::vector3df(0), irr::video::SColor(255,000,000,255), irr::core::vector2df(0.5,0.5)) );
    Buffer->getIndexBuffer().push_back( 15 ); Buffer->getIndexBuffer().push_back( 16 ); Buffer->getIndexBuffer().push_back( 17 );

    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[7], irr::core::vector3df(0), irr::video::SColor(255,000,000,255), irr::core::vector2df(0,0)) );
    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[6], irr::core::vector3df(0), irr::video::SColor(255,000,000,255), irr::core::vector2df(0,1)) );
    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[9], irr::core::vector3df(0), irr::video::SColor(255,000,000,255), irr::core::vector2df(0.5,0.5)) );
    Buffer->getIndexBuffer().push_back( 18 ); Buffer->getIndexBuffer().push_back( 19 ); Buffer->getIndexBuffer().push_back( 20 );

    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[6], irr::core::vector3df(0), irr::video::SColor(255,000,000,255), irr::core::vector2df(0,0)) );
    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[7], irr::core::vector3df(0), irr::video::SColor(255,000,000,255), irr::core::vector2df(0,1)) );
    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[10], irr::core::vector3df(0), irr::video::SColor(255,000,000,255), irr::core::vector2df(0.5,0.5)) );
    Buffer->getIndexBuffer().push_back( 21 ); Buffer->getIndexBuffer().push_back( 22 ); Buffer->getIndexBuffer().push_back( 23 );



    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[9], irr::core::vector3df(0), irr::video::SColor(255,255,000,000), irr::core::vector2df(0,0)) );
    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[8], irr::core::vector3df(0), irr::video::SColor(255,255,000,000), irr::core::vector2df(0,1)) );
    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[0], irr::core::vector3df(0), irr::video::SColor(255,255,000,000), irr::core::vector2df(0.5,0.5)) );
    Buffer->getIndexBuffer().push_back( 24 ); Buffer->getIndexBuffer().push_back( 25 ); Buffer->getIndexBuffer().push_back( 26 );

    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[8], irr::core::vector3df(0), irr::video::SColor(255,255,000,000), irr::core::vector2df(0,0)) );
    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[9], irr::core::vector3df(0), irr::video::SColor(255,255,000,000), irr::core::vector2df(0,1)) );
    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[1], irr::core::vector3df(0), irr::video::SColor(255,255,000,000), irr::core::vector2df(0.5,0.5)) );
    Buffer->getIndexBuffer().push_back( 27 ); Buffer->getIndexBuffer().push_back( 28 ); Buffer->getIndexBuffer().push_back( 29 );

    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[10], irr::core::vector3df(0), irr::video::SColor(255,255,000,000), irr::core::vector2df(0,0)) );
    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[11], irr::core::vector3df(0), irr::video::SColor(255,255,000,000), irr::core::vector2df(0,1)) );
    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[2], irr::core::vector3df(0), irr::video::SColor(255,255,000,000), irr::core::vector2df(0.5,0.5)) );
    Buffer->getIndexBuffer().push_back( 30 ); Buffer->getIndexBuffer().push_back( 31 ); Buffer->getIndexBuffer().push_back( 32 );

    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[11], irr::core::vector3df(0), irr::video::SColor(255,255,000,000), irr::core::vector2df(0,0)) );
    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[10], irr::core::vector3df(0), irr::video::SColor(255,255,000,000), irr::core::vector2df(0,1)) );
    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[3], irr::core::vector3df(0), irr::video::SColor(255,255,000,000), irr::core::vector2df(0.5,0.5)) );
    Buffer->getIndexBuffer().push_back( 33 ); Buffer->getIndexBuffer().push_back( 34 ); Buffer->getIndexBuffer().push_back( 35 );




    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[0], irr::core::vector3df(0), irr::video::SColor(255,200,200,000), irr::core::vector2df(0,0)) );
    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[8], irr::core::vector3df(0), irr::video::SColor(255,200,200,000), irr::core::vector2df(0,1)) );
    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[4], irr::core::vector3df(0), irr::video::SColor(255,200,200,000), irr::core::vector2df(0.5,0.5)) );
    Buffer->getIndexBuffer().push_back( 36 ); Buffer->getIndexBuffer().push_back( 37 ); Buffer->getIndexBuffer().push_back( 38 );

    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[0], irr::core::vector3df(0), irr::video::SColor(255,200,200,000), irr::core::vector2df(0,0)) );
    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[7], irr::core::vector3df(0), irr::video::SColor(255,200,200,000), irr::core::vector2df(0,1)) );
    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[9], irr::core::vector3df(0), irr::video::SColor(255,200,200,000), irr::core::vector2df(0.5,0.5)) );
    Buffer->getIndexBuffer().push_back( 39 ); Buffer->getIndexBuffer().push_back( 40 ); Buffer->getIndexBuffer().push_back( 41 );

    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[1], irr::core::vector3df(0), irr::video::SColor(255,200,200,000), irr::core::vector2df(0,0)) );
    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[5], irr::core::vector3df(0), irr::video::SColor(255,200,200,000), irr::core::vector2df(0,1)) );
    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[8], irr::core::vector3df(0), irr::video::SColor(255,200,200,000), irr::core::vector2df(0.5,0.5)) );
    Buffer->getIndexBuffer().push_back( 42 ); Buffer->getIndexBuffer().push_back( 43 ); Buffer->getIndexBuffer().push_back( 44 );

    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[1], irr::core::vector3df(0), irr::video::SColor(255,200,200,000), irr::core::vector2df(0,0)) );
    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[9], irr::core::vector3df(0), irr::video::SColor(255,200,200,000), irr::core::vector2df(0,1)) );
    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[6], irr::core::vector3df(0), irr::video::SColor(255,200,200,000), irr::core::vector2df(0.5,0.5)) );
    Buffer->getIndexBuffer().push_back( 45 ); Buffer->getIndexBuffer().push_back( 46 ); Buffer->getIndexBuffer().push_back( 47 );

    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[2], irr::core::vector3df(0), irr::video::SColor(255,200,200,000), irr::core::vector2df(0,0)) );
    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[6], irr::core::vector3df(0), irr::video::SColor(255,200,200,000), irr::core::vector2df(0,1)) );
    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[10], irr::core::vector3df(0), irr::video::SColor(255,200,200,000), irr::core::vector2df(0.5,0.5)) );
    Buffer->getIndexBuffer().push_back( 48 ); Buffer->getIndexBuffer().push_back( 49 ); Buffer->getIndexBuffer().push_back( 50 );

    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[2], irr::core::vector3df(0), irr::video::SColor(255,200,200,000), irr::core::vector2df(0,0)) );
    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[11], irr::core::vector3df(0), irr::video::SColor(255,200,200,000), irr::core::vector2df(0,1)) );
    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[5], irr::core::vector3df(0), irr::video::SColor(255,200,200,000), irr::core::vector2df(0.5,0.5)) );
    Buffer->getIndexBuffer().push_back( 51 ); Buffer->getIndexBuffer().push_back( 52 ); Buffer->getIndexBuffer().push_back( 53 );

    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[3], irr::core::vector3df(0), irr::video::SColor(255,200,200,000), irr::core::vector2df(0,0)) );
    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[10], irr::core::vector3df(0), irr::video::SColor(255,200,200,000), irr::core::vector2df(0,1)) );
    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[7], irr::core::vector3df(0), irr::video::SColor(255,200,200,000), irr::core::vector2df(0.5,0.5)) );
    Buffer->getIndexBuffer().push_back( 54 ); Buffer->getIndexBuffer().push_back( 55 ); Buffer->getIndexBuffer().push_back( 56 );

    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[3], irr::core::vector3df(0), irr::video::SColor(255,200,200,000), irr::core::vector2df(0,0)) );
    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[4], irr::core::vector3df(0), irr::video::SColor(255,200,200,000), irr::core::vector2df(0,1)) );
    Buffer->getVertexBuffer().push_back( irr::video::S3DVertex( listevertex[11], irr::core::vector3df(0), irr::video::SColor(255,200,200,000), irr::core::vector2df(0.5,0.5)) );
    Buffer->getIndexBuffer().push_back( 57 ); Buffer->getIndexBuffer().push_back( 58 ); Buffer->getIndexBuffer().push_back( 59 );

    for(irr::u16 nbIterations=0; nbIterations < iterations; ++nbIterations )
    {
        /// variables
        irr::scene::IVertexBuffer* VBuffer = new irr::scene::CVertexBuffer(irr::video::EVT_STANDARD);
        irr::scene::IIndexBuffer* IBuffer = new irr::scene::CIndexBuffer(irr::video::EIT_32BIT);
        VBuffer->setHardwareMappingHint( Buffer->getVertexBuffer().getHardwareMappingHint() );
        IBuffer->setHardwareMappingHint( Buffer->getIndexBuffer().getHardwareMappingHint() );
        /// créations des couleurs
        irr::video::SColor color1(255,255,000,000);
        irr::video::SColor color2(255,000,255,000);
        irr::video::SColor color3(255,000,000,255);
        irr::video::SColor color4(255,255,255,000);
        /// pour chaque triangles on en créé 4 nouveaux par subdivisions
        for(irr::u32 a=0; a < Buffer->getIndexBuffer().size(); a+=3)
        {
            /// on enregistre l'index
            irr::u32 index = VBuffer->size();
            /// on enregistre les 3 points existant
            irr::core::vector3df A( Buffer->getVertexBuffer()[Buffer->getIndexBuffer()[a]].Pos );
            irr::core::vector3df B( Buffer->getVertexBuffer()[Buffer->getIndexBuffer()[a+1]].Pos );
            irr::core::vector3df C( Buffer->getVertexBuffer()[Buffer->getIndexBuffer()[a+2]].Pos );
            /// on calcule les 3 nouveaux points
            irr::core::vector3df D( irr::core::line3df(A, B).getMiddle().setLength(rayon) );
            irr::core::vector3df E( irr::core::line3df(B, C).getMiddle().setLength(rayon) );
            irr::core::vector3df F( irr::core::line3df(C, A).getMiddle().setLength(rayon) );
            /// on insère les 4 nouveaux triangles
            /// ADF
            VBuffer->push_back( irr::video::S3DVertex( A, irr::core::vector3df(0), color1, irr::core::vector2df(0,0)) );
            VBuffer->push_back( irr::video::S3DVertex( D, irr::core::vector3df(0), color1, irr::core::vector2df(0,1)) );
            VBuffer->push_back( irr::video::S3DVertex( F, irr::core::vector3df(0), color1, irr::core::vector2df(0.5,0.5)) );
            IBuffer->push_back( index ); IBuffer->push_back( index+1 ); IBuffer->push_back( index+2 );
            /// DBE
            VBuffer->push_back( irr::video::S3DVertex( D, irr::core::vector3df(0), color2, irr::core::vector2df(0,0)) );
            VBuffer->push_back( irr::video::S3DVertex( B, irr::core::vector3df(0), color2, irr::core::vector2df(0,1)) );
            VBuffer->push_back( irr::video::S3DVertex( E, irr::core::vector3df(0), color2, irr::core::vector2df(0.5,0.5)) );
            IBuffer->push_back( index+3 ); IBuffer->push_back( index+4 ); IBuffer->push_back( index+5 );
            /// FDE
            VBuffer->push_back( irr::video::S3DVertex( F, irr::core::vector3df(0), color3, irr::core::vector2df(0,0)) );
            VBuffer->push_back( irr::video::S3DVertex( D, irr::core::vector3df(0), color3, irr::core::vector2df(0,1)) );
            VBuffer->push_back( irr::video::S3DVertex( E, irr::core::vector3df(0), color3, irr::core::vector2df(0.5,0.5)) );
            IBuffer->push_back( index+6 ); IBuffer->push_back( index+7 ); IBuffer->push_back( index+8 );
            /// FEC
            VBuffer->push_back( irr::video::S3DVertex( F, irr::core::vector3df(0), color4, irr::core::vector2df(0,0)) );
            VBuffer->push_back( irr::video::S3DVertex( E, irr::core::vector3df(0), color4, irr::core::vector2df(0,1)) );
            VBuffer->push_back( irr::video::S3DVertex( C, irr::core::vector3df(0), color4, irr::core::vector2df(0.5,0.5)) );
            IBuffer->push_back( index+9 ); IBuffer->push_back( index+10 ); IBuffer->push_back( index+11 );

        }
        /// on change les buffers
        Buffer->setVertexBuffer( VBuffer );
        Buffer->setIndexBuffer( IBuffer );
    }
    /// on mets à jour les paramètres de création de la sphere
    Rayon = rayon;
    NbIterations = iterations;
    /// on met à jour la Bounding Box
    createBoundingBox();
    /// tout s'est bien passé on quitte
    return true;
}


irr::scene::CDynamicMeshBuffer* SphereIcosaUnlimited::getBuffer()
{
    return Buffer;
}

irr::video::SMaterial& SphereIcosaUnlimited::getMaterial()
{
    return Buffer->Material;
}

void SphereIcosaUnlimited::setMaterial(irr::video::SMaterial material)
{
    Buffer->Material = material;
}

irr::core::aabbox3df& SphereIcosaUnlimited::getBoundingBox()
{
    return BoundingBox;
}

void SphereIcosaUnlimited::setUseVBO(irr::scene::E_HARDWARE_MAPPING vbo)
{
        Buffer->getVertexBuffer().setHardwareMappingHint(vbo);
        Buffer->getIndexBuffer().setHardwareMappingHint(vbo);
}

void SphereIcosaUnlimited::createBoundingBox()
{
    BoundingBox = irr::core::aabbox3df( irr::core::vector3df(-Rayon), irr::core::vector3df(Rayon) );
}

Utilisation :

Code:

SMaterial blanc;
blanc.Lighting = false;

SphereIcosaUnlimited sphere(blanc, 1000, 8);
sphere.setUseVBO(EHM_STATIC);
CdynamicMeshBuffer* bufferessai32 = sphere.getBuffer();


// à mettre entre beginscene et endscene
Driver->drawMeshBuffer( SphereBuffer );

ATTENTION : Je ne l'ai pas précisé avant mais il faut libérer les buffers car ce n'est pas fait dans la classe.

core i7 4970K @ 4GHz - 32GB ddr3 19200(2400MHz) - ssd samsung 840 evo 250GB - GTX1080Ti (4K) - Cooler master storm stryker blanc.
"L'alcool, c'est comme Activia, c'est actif à l'intérieur et ça se voit à l'extérieur."

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#2 

23-03-2012 23:46:20

Copland
Modérateur
Lieu: ZarbiLand
Date d'inscription: 22-09-2006
Messages: 657
Site web

Salut,
Tout simplement énorme ton code smile.
Je n'en aurai probablement pas l'utilité mais je serais curieux de savoir pourquoi tu as besoin de se type de mesh ?

Config : I5 2400, ATI HD6870 1Go DDR5, 4Go DDR3.
Single Boot : Windows Seven.

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#3 

24-03-2012 09:26:09

johnplayer
Habitué
Date d'inscription: 30-09-2007
Messages: 431

La particularite de cette sphere est qu'elle est entièrement composée de triangles EQUILATERAUX. Le mesh est donc régulier, ce qui facilite les opérations de déformation du mesh. Par exemple si tu éloigne un vertex du centre de la sphère, tu obtiendras un pic bien arrondi. Avec des quads, il faudrait réagencer leurs diagonales pour qu'elles "suivent" le pic. Si tu n'as pas compris je te ferai un screen pour mieux expliquer.

core i7 4970K @ 4GHz - 32GB ddr3 19200(2400MHz) - ssd samsung 840 evo 250GB - GTX1080Ti (4K) - Cooler master storm stryker blanc.
"L'alcool, c'est comme Activia, c'est actif à l'intérieur et ça se voit à l'extérieur."

Hors ligne


#4 

24-03-2012 09:47:58

tmyke
Administrateur
Date d'inscription: 24-03-2008
Messages: 1025

Copland :

Salut,
Tout simplement énorme ton code smile.


je plussoie sur ce point, super ton code big_smile

Force et sagesse...

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#5 

24-03-2012 12:42:07

johnplayer
Habitué
Date d'inscription: 30-09-2007
Messages: 431

Merci pour les compliments.^^ Je travaille sur des fonctions de modification du mesh afin de pouvoir extruder, voir même faire un lod. Mais je vais d'abord retravailler la classe , il faudrait que suivant le nombre d'itérations la sphère soit divisée sur plusieurs buffers afin de ne pas limiter le nombre de triangles. Car les buffers 32bits ne sont pas compatibles avec toutes les cartes graphiques.
Sur ce, je repars coder. wink

core i7 4970K @ 4GHz - 32GB ddr3 19200(2400MHz) - ssd samsung 840 evo 250GB - GTX1080Ti (4K) - Cooler master storm stryker blanc.
"L'alcool, c'est comme Activia, c'est actif à l'intérieur et ça se voit à l'extérieur."

Hors ligne


 

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