Vec3D CSceneData::getVertexNormal(int x, int y)const
{
float a = getVertexHeight(x, y);
float b = getVertexHeight(x, y+1);
float c = getVertexHeight(x+1, y);
Vec3D vVector0(0,(b-a),1);
Vec3D vVector1(1,(c-a),0);
Vec3D vN = vVector0.cross(vVector1);
return vN.normalize();
}
Vec3D CTerrainData::getVertexNormal(int nCellX, int nCellY)const
{
float a = getVertexHeight(nCellX, nCellY);
float b = getVertexHeight(nCellX, nCellY+1);
float c = getVertexHeight(nCellX+1, nCellY);
Vec3D vVector0(0,(b-a),1);
Vec3D vVector1(1,(c-a),0);
Vec3D vN = vVector0.cross(vVector1);
return vN.normalize();
}
