private void DrawSelectionRectangle(Vector2 dragStart, Vector2 curMousePos)
{
Color oldColor = Handles.color;
Handles.color = _drawSettings.selectionColor;
Vector2 min;
Vector2 max;
VecUtil.MinMax(CellToWorld(WorldToCell(dragStart)), CellToWorld(WorldToCell(curMousePos)), out min, out max);
Vector2 offset = new Vector2(0.5f / _division.x, 0.5f / _division.y);
EditorUtil.DrawWireRectangleMinMax(min - offset, max + offset);
Handles.color = oldColor;
}
/// <summary> Rounds the given world coordinate to the world position of the closest cell. </summary>
private Vector2 GetClosestCellPosition(Vector2 world)
{
return(VecUtil.RoundToNearestVector2f(world - _offset, _division));
}
bool LayerMarch(Vector3 startPoint, Vector3 dir, out Vec3i hitIdx, out Vec3i lastIdx, ref float t)
{
dir = Vector3.Normalize(dir);
Vector3 voxelGridSize = new Vector3(voxels.Size.x, voxels.Size.y, voxels.Size.z);
Vector3 p0 = startPoint;
float endT = VecUtil.MinComp(Vector3.Max(
VecUtil.Div(voxelGridSize - p0, dir),
VecUtil.Div(-p0, dir)
));
Vector3 dirAbs = VecUtil.Abs(dir);
// TODO: This is making invalid assumptions about p0
//Vector3 p0abs = VecUtil.Mul(Vector3.one - VecUtil.Step(0, dir), voxelGridSize)
// + VecUtil.Mul(VecUtil.Sign(dir), p0);
//Vector3 negativeDimensions = Vector3.one - VecUtil.Step(0, dir);
//Vector3 p0abs = VecUtil.Mul(negativeDimensions, voxelGridSize) - VecUtil.Mul(negativeDimensions, p0)
//+ VecUtil.Mul(VecUtil.Step(0, dir), p0);
Vector3 p0abs = p0;
for (int i = 0; i < 3; ++i)
{
if (dir[i] < 0)
{
p0abs[i] = voxelGridSize[i] - p0[i];
}
}
//float t = 0;
//t = 0;
lastIdx = ToIndex(p0 + dir * (t - kEps));
int iterationCount = 0;
List <Vector3> debugPos = new List <Vector3>();
List <Vector3> debugPosAbs = new List <Vector3>();
t += kEps;
while (t <= endT)
{
Vec3i idx = ToIndex(p0 + dir * (t + kEps));
debugPos.Add(p0 + dir * (t + kEps));
//Vec3i idx = ToIndex(p0 + dir * t);
debugPosAbs.Add(p0abs + dirAbs * (t + kEps));
Vector3 pAbs = p0abs + dirAbs * (t + kEps);
////////////////
// DEBUG CODE
Vec3i delta = idx - lastIdx;
if (Vec3i.Dot(delta, delta) > 1)
{
Debug.LogWarning("Skipped a voxel");
}
if (!voxels.IsValid(idx))
{
break;
}
Color32 c = voxels[idx];
if (c.a > 0)
{
hitIdx = idx;
return(true);
}
lastIdx = idx;
// Pretend we came in from a positive direction
//Vector3 pAbs = p0abs + dirAbs * (t);
Vector3 deltas = VecUtil.Div(Vector3.one - VecUtil.Fract(pAbs), dirAbs);
//t += Mathf.Max(VecUtil.MinComp(deltas), float.Epsilon);
//t += Mathf.Max(VecUtil.MinComp(deltas), 0.0005f);
t += Mathf.Max(VecUtil.MinComp(deltas), kEps) + kEps;
//Vector3 pAbs = p0abs + dirAbs * t;
//Vector3 deltas = VecUtil.Div(Vector3.one - VecUtil.Fract(pAbs), dirAbs);
//t += Mathf.Max(VecUtil.MinComp(deltas), float.Epsilon);
//Vector3 pAbs = p0abs + dirAbs * t;
//Vector3 p = p0 + dir * t;
//Vector3 deltas = VecUtil.Div(VecUtil.Step(0, dir) - VecUtil.Fract(p), dir);
//t += Mathf.Max(VecUtil.MinComp(deltas), 0.0005f);
//t += Mathf.Max(VecUtil.MinComp(deltas), float.Epsilon);
iterationCount++;
}
hitIdx = new Vec3i(-1);
return(false);
}
