const IBox View::computeCursor(const int2 &start, const int2 &end, const int3 &bbox, int height, int offset) const {
float2 height_off = worldToScreen(float3(0, height, 0));
int3 gbox(cellSize(), 1, cellSize());
int3 start_pos = asXZ((int2)( screenToWorld(float2(start + pos()) - height_off) + float2(0.5f, 0.5f)));
int3 end_pos = asXZ((int2)( screenToWorld(float2(end + pos()) - height_off) + float2(0.5f, 0.5f)));
start_pos.y = end_pos.y = height + offset;
{
int apos1 = start_pos.x % gbox.x;
int apos2 = apos1 - gbox.x + bbox.x;
start_pos.x -= apos1 < gbox.x - apos1 || bbox.x >= gbox.x? apos1 : apos2;
}
{
int apos1 = start_pos.z % gbox.z;
int apos2 = apos1 - gbox.z + bbox.z;
start_pos.z -= apos1 < gbox.z - apos1 || bbox.z >= gbox.z? apos1 : apos2;
}
if(end == start)
end_pos = start_pos;
int3 dir(end_pos.x >= start_pos.x? 1 : -1, 1, end_pos.z >= start_pos.z? 1 : -1);
int3 size(::abs(end_pos.x - start_pos.x), 1, ::abs(end_pos.z - start_pos.z));
size += bbox - int3(1, 1, 1);
size.x -= size.x % bbox.x;
size.z -= size.z % bbox.z;
size = max(bbox, size);
if(dir.x < 0)
start_pos.x += bbox.x;
if(dir.z < 0)
start_pos.z += bbox.z;
end_pos = start_pos + dir * size;
if(start_pos.x > end_pos.x) swap(start_pos.x, end_pos.x);
if(start_pos.z > end_pos.z) swap(start_pos.z, end_pos.z);
int2 dims = m_tile_map.dimensions();
start_pos = asXZY(clamp(start_pos.xz(), int2(0, 0), dims), start_pos.y);
end_pos = asXZY(clamp( end_pos.xz(), int2(0, 0), dims), end_pos.y);
return IBox(start_pos, end_pos);
}
void EntitiesEditor::computeCursor(int2 start, int2 end, bool floor_mode) {
float2 height_off = worldToScreen(int3(0, 0, 0));
start += m_view.pos();
end += m_view.pos();
Ray ray = screenRay(start);
Flags::Type flags = Flags::all;
if(floor_mode)
flags = flags & ~(Flags::wall_tile | Flags::object_tile);
auto isect = m_tile_map.trace(ray, -1, flags | Flags::visible);
float3 pos = isect.first == -1? (float3)asXZ(screenToWorld(start)) : ray.at(isect.second);
m_cursor_pos = (float3)round(pos);
m_selection = IRect(min(start, end), max(start, end));
}
