Problem mit Bump-Mapping [solved]

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Alyx

Treue Seele

Beiträge: 236

Wohnort: Hannover

Beruf: Head Of Software Development

28.01.2010, 12:26

Die Bilder sehen auf jeden Fall alles andere als korrekt aus. Wenn du sie um 0.5 zentrieren würdest, damit man auch sieht, wie weit sie die Vektoren in's negative gehen, wäre das allerdings hilfreich.

Zu den Tangenten:

Quellcode

void SFObject3D::RecalcTanbino()
{
    if( !miVertexCount )
    {
        return;
    }

    for( int i=0; i<miVertexCount; ++i )
    {
        mVertices[i].mTangent.mX = mVertices[i].mTangent.mY = mVertices[i].mTangent.mZ = 0;
        mVertices[i].mBinormal.mX = mVertices[i].mBinormal.mY = mVertices[i].mBinormal.mZ = 0;
    }

    for( int i=0; i<~mlIndices/3; ++i )
    {           
        int off = i*3;
        AVector3DD  p21     = mVertices[mlIndices[off+1]].mCoord-mVertices[mlIndices[off+0]].mCoord,
            p31     = mVertices[mlIndices[off+2]].mCoord-mVertices[mlIndices[off+0]].mCoord,
            uv21    = mVertices[mlIndices[off+1]].mTexCoords[0]-mVertices[mlIndices[off+0]].mTexCoords[0],
            uv31    = mVertices[mlIndices[off+2]].mTexCoords[0]-mVertices[mlIndices[off+0]].mTexCoords[0];

        AVector3DD  tangent     = (p21*uv31.mY)-(p31*uv21.mY),
            binormal    = (p31*uv21.mX)-(p21*uv31.mX);

        for( int side=0; side<3; ++side )
        {           
            mVertices[mlIndices[off+side]].mTangent += tangent.Normalize();
            mVertices[mlIndices[off+side]].mBinormal += binormal.Normalize();
        }

        /*
        (v3 - v1).(p2 - p1) - (v2 - v1).(p3 - p1)
        T = ---------------------------------------
        (u2 - u1).(v3 - v1) - (v2 - v1).(u3 - u1)

        (u3 - u1).(p2 - p1) - (u2 - u1).(p3 - p1)
        B = ---------------------------------------
        (v2 - v1).(u3 - u1) - (u2 - u1).(v3 - v1)   */
    }
    for( int i=0; i<miVertexCount; ++i )
    {
        mVertices[i].mTangent.Normalize();
        mVertices[i].mBinormal.Normalize();
    }
}