MarkerMesh::MarkerMesh(float x, float y, float z, float size)
{
float sqrt3 = 1.73205080757;
float sqrt2 = 1.41421356237;
float s2 = size / 2;
float c2 = s2 / sqrt2;
float c3 = s2 / sqrt3;
MeshBuilder builder;
builder.add_line(Math::Vector3<float> ({ x + s2, y, z }),
Math::Vector3<float> ({ x - s2, y, z }));
builder.add_line(Math::Vector3<float> ({ x, y + s2, z }),
Math::Vector3<float> ({ x, y - s2, z }));
builder.add_line(Math::Vector3<float> ({ x, y, z + s2 }),
Math::Vector3<float> ({ x, y, z - s2 }));
builder.add_line(Math::Vector3<float> ({ x + c2, y + c2, z }),
Math::Vector3<float> ({ x - c2, y - c2, z }));
builder.add_line(Math::Vector3<float> ({ x + c2, y - c2, z }),
Math::Vector3<float> ({ x - c2, y + c2, z }));
builder.add_line(Math::Vector3<float> ({ x, y + c2, z + c2}),
Math::Vector3<float> ({ x, y - c2, z - c2}));
builder.add_line(Math::Vector3<float> ({ x, y + c2, z - c2}),
Math::Vector3<float> ({ x, y - c2, z + c2}));
builder.add_line(Math::Vector3<float> ({ x + c2, y, z + c2 }),
Math::Vector3<float> ({ x - c2, y, z - c2 }));
builder.add_line(Math::Vector3<float> ({ x - c2, y, z + c2 }),
Math::Vector3<float> ({ x + c2, y, z - c2 }));
_mesh = builder.finalize ();
}
SurfaceMesh::SurfaceMesh (const CSG::Surface& surface)
: _surface (surface)
{
MeshBuilder b;
int cnt = 0;
surface.traverse([&] (const CSG::Pixel& pix, bool filled)
{
float s2 = pix.size / 2;
Math::Vector2 pts[8];
float densities[4];
int tbl_index = 0;
pts[0] = pix.center;
pts[0].x += s2;
pts[0].y += s2;
if (_surface.test_point (pts[0]))
tbl_index |= 1;
densities[0] = _surface.density (pts[0]);
pts[1] = pix.center;
pts[1].x += s2;
pts[1].y -= s2;
if (_surface.test_point (pts[1]))
tbl_index |= 2;
densities[1] = _surface.density (pts[1]);
pts[2] = pix.center;
pts[2].x -= s2;
pts[2].y -= s2;
if (_surface.test_point (pts[2]))
tbl_index |= 4;
densities[2] = _surface.density (pts[2]);
pts[3] = pix.center;
pts[3].x -= s2;
pts[3].y += s2;
if (_surface.test_point (pts[3]))
tbl_index |= 8;
densities[3] = _surface.density (pts[3]);
if (MSEdgeTable[tbl_index] & 1) {
pts[4] = Math::Vector2 (
Math::f_interpolate (0, densities[0], pts[0].x,
densities[1], pts[1].x),
Math::f_interpolate (0, densities[0], pts[0].y,
densities[1], pts[1].y));
}
if (MSEdgeTable[tbl_index] & 2) {
pts[5] = Math::Vector2 (
Math::f_interpolate (0, densities[1], pts[1].x,
densities[2], pts[2].x),
Math::f_interpolate (0, densities[1], pts[1].y,
densities[2], pts[2].y));
}
if (MSEdgeTable[tbl_index] & 4) {
pts[6] = Math::Vector2 (
Math::f_interpolate (0, densities[2], pts[2].x,
densities[3], pts[3].x),
Math::f_interpolate (0, densities[2], pts[2].y,
densities[3], pts[3].y));
}
if (MSEdgeTable[tbl_index] & 8) {
pts[7] = Math::Vector2 (
Math::f_interpolate (0, densities[3], pts[3].x,
densities[0], pts[0].x),
Math::f_interpolate (0, densities[3], pts[3].y,
densities[0], pts[0].y));
}
for (int i = 0; MSTriangleTable[tbl_index][i] != -1; i += 3) {
b.add_triangle (Math::Vector3 (
pts[MSTriangleTable[tbl_index][i]].x,
pts[MSTriangleTable[tbl_index][i]].y,
0),
Math::Vector3 (
pts[MSTriangleTable[tbl_index][i + 1]].x,
pts[MSTriangleTable[tbl_index][i + 1]].y,
0),
Math::Vector3 (
pts[MSTriangleTable[tbl_index][i + 2]].x,
pts[MSTriangleTable[tbl_index][i + 2]].y,
0));
}
return true;
}, .1);
MeshBuilder::Buffs buffs = b.finalize ();
_v.alloc (std::get<0> (buffs).first, std::get<0> (buffs).second);
_w.alloc (std::get<1> (buffs).first, std::get<1> (buffs).second);
_f.alloc (std::get<2> (buffs).first, std::get<2> (buffs).second);
const CSG::BRect& br = _surface.bounds ();
MeshBuilder bb;
bb.add_line (Math::Vector3 (br.lb.x, br.lb.y, 0),
Math::Vector3 (br.lb.x, br.ub.y, 0));
bb.add_line (Math::Vector3 (br.lb.x, br.ub.y, 0),
Math::Vector3 (br.ub.x, br.ub.y, 0));
bb.add_line (Math::Vector3 (br.ub.x, br.ub.y, 0),
Math::Vector3 (br.ub.x, br.lb.y, 0));
bb.add_line (Math::Vector3 (br.ub.x, br.lb.y, 0),
Math::Vector3 (br.lb.x, br.lb.y, 0));
MeshBuilder::Buffs bb_buffs = bb.finalize ();
_bbv.alloc (std::get<0> (bb_buffs).first, std::get<0> (bb_buffs).second);
_bbe.alloc (std::get<1> (bb_buffs).first, std::get<1> (bb_buffs).second);
}
