void Brush_ConstructSphere(Brush& brush, const AABB& bounds, std::size_t sides, const char* shader, const TextureProjection& projection)
{
if(sides < c_brushSphere_minSides)
{
globalErrorStream() << c_brushSphere_name << ": sides " << Unsigned(sides) << ": too few sides, minimum is " << Unsigned(c_brushSphere_minSides) << "\n";
return;
}
if(sides > c_brushSphere_maxSides)
{
globalErrorStream() << c_brushSphere_name << ": sides " << Unsigned(sides) << ": too many sides, maximum is " << Unsigned(c_brushSphere_maxSides) << "\n";
return;
}
brush.undoSave();
brush.clear();
brush.reserve(sides*sides);
float radius = max_extent(bounds.extents);
const Vector3& mid = bounds.origin;
Vector3 planepts[3];
double dt = 2 * c_pi / sides;
double dp = c_pi / sides;
for(std::size_t i=0; i < sides; i++)
{
for(std::size_t j=0;j < sides-1; j++)
{
double t = i * dt;
double p = float(j * dp - c_pi / 2);
planepts[0] = vector3_added(mid, vector3_scaled(vector3_for_spherical(t, p), radius));
planepts[1] = vector3_added(mid, vector3_scaled(vector3_for_spherical(t, p + dp), radius));
planepts[2] = vector3_added(mid, vector3_scaled(vector3_for_spherical(t + dt, p + dp), radius));
brush.addPlane(planepts[0], planepts[1], planepts[2], shader, projection);
}
}
{
double p = (sides - 1) * dp - c_pi / 2;
for(std::size_t i = 0; i < sides; i++)
{
double t = i * dt;
planepts[0] = vector3_added(mid, vector3_scaled(vector3_for_spherical(t, p), radius));
planepts[1] = vector3_added(mid, vector3_scaled(vector3_for_spherical(t + dt, p + dp), radius));
planepts[2] = vector3_added(mid, vector3_scaled(vector3_for_spherical(t + dt, p), radius));
brush.addPlane(planepts[0], planepts[1], planepts[2], shader, projection);
}
}
}
void Brush_ConstructCone(Brush& brush, const AABB& bounds, std::size_t sides, const char* shader, const TextureProjection& projection)
{
if(sides < c_brushCone_minSides)
{
globalErrorStream() << c_brushCone_name << ": sides " << Unsigned(sides) << ": too few sides, minimum is " << Unsigned(c_brushCone_minSides) << "\n";
return;
}
if(sides > c_brushCone_maxSides)
{
globalErrorStream() << c_brushCone_name << ": sides " << Unsigned(sides) << ": too many sides, maximum is " << Unsigned(c_brushCone_maxSides) << "\n";
return;
}
brush.undoSave();
brush.clear();
brush.reserve(sides+1);
Vector3 mins(vector3_subtracted(bounds.origin, bounds.extents));
Vector3 maxs(vector3_added(bounds.origin, bounds.extents));
float radius = max_extent(bounds.extents);
const Vector3& mid = bounds.origin;
Vector3 planepts[3];
planepts[0][0] = mins[0];planepts[0][1] = mins[1];planepts[0][2] = mins[2];
planepts[1][0] = maxs[0];planepts[1][1] = mins[1];planepts[1][2] = mins[2];
planepts[2][0] = maxs[0];planepts[2][1] = maxs[1];planepts[2][2] = mins[2];
brush.addPlane(planepts[0], planepts[1], planepts[2], shader, projection);
for (std::size_t i=0 ; i<sides ; ++i)
{
double sv = sin (i*3.14159265*2/sides);
double cv = cos (i*3.14159265*2/sides);
planepts[0][0] = static_cast<float>(floor(mid[0]+radius*cv+0.5));
planepts[0][1] = static_cast<float>(floor(mid[1]+radius*sv+0.5));
planepts[0][2] = mins[2];
planepts[1][0] = mid[0];
planepts[1][1] = mid[1];
planepts[1][2] = maxs[2];
planepts[2][0] = static_cast<float>(floor(planepts[0][0] - radius * sv + 0.5));
planepts[2][1] = static_cast<float>(floor(planepts[0][1] + radius * cv + 0.5));
planepts[2][2] = maxs[2];
brush.addPlane(planepts[0], planepts[1], planepts[2], shader, projection);
}
}
BOOST_FORCEINLINE result_type operator()(Expr& e) const
{
return max_extent(nt2::extent(boost::proto::child_c<0>(e)),
nt2::extent(boost::proto::child_c<1>(e)),
nt2::extent(boost::proto::child_c<2>(e)));
}
