public void Project2Mesh()
{
if (this.strokeScreenPos.Count < 1) return;
Rectangle viewport = new Rectangle(0, 0, this.Width, this.Height);
OpenGLProjector projector = new OpenGLProjector();
Mesh m = currMeshRecord.Mesh;
bool laser = Program.toolsProperty.Laser;
double eps = Program.toolsProperty.DepthTolerance;
foreach (Vector2d pos in this.strokeScreenPos)
{
double minDis = double.MaxValue;
int minIndex = -1;
for (int i = 0, j = 0; i < m.VertexCount; i++, j += 3)
{
Vector3d v = projector.Project(m.VertexPos, j);
Vector2d u = new Vector2d(v.x, v.y);
if (!viewport.Contains((int)v.x, (int)v.y)) continue;
if (projector.GetDepthValue((int)v.x, (int)v.y) - v.z < eps) continue;
double dis = (u - pos).Length();
if (dis < minDis)
{
minIndex = i;
minDis = dis;
}
}
if (minIndex != -1)
{
this.curr_v_stroke.Add(minIndex);
}
minIndex = -1;
for (int i = 0, j = 0; i < m.FaceCount; i++, j += 3)
{
int c0 = m.FaceIndex[j]*3;
int c1 = m.FaceIndex[j + 1]*3;
int c2 = m.FaceIndex[j + 2]*3;
Vector3d v0 = projector.Project(m.VertexPos, c0);
Vector3d v1 = projector.Project(m.VertexPos, c1);
Vector3d v2 = projector.Project(m.VertexPos, c2);
Vector2d u0 = new Vector2d(v0.x, v0.y);
Vector2d u1 = new Vector2d(v1.x, v1.y);
Vector2d u2 = new Vector2d(v2.x, v2.y);
if (!viewport.Contains((int)v0.x, (int)v0.y)) continue;
if (projector.GetDepthValue((int)v0.x, (int)v0.y) - v0.z < eps) continue;
if (PointInTriangle(pos, u0, u1, u2))
{
minIndex = i;
this.curr_f_stroke.Add(minIndex);
break;
}
}
}
}
private int SelectVertexByPoint(Vector2d currPos)
{
Rectangle viewport = new Rectangle(0, 0, this.Width, this.Height);
OpenGLProjector projector = new OpenGLProjector();
Mesh m = currMeshRecord.Mesh;
bool laser = Program.toolsProperty.Laser;
double eps = Program.toolsProperty.DepthTolerance;
double minDis = double.MaxValue;
int minIndex = -1;
for (int i = 0, j = 0; i < m.VertexCount; i++, j += 3)
{
Vector3d v = projector.Project(m.VertexPos, j);
Vector2d u = new Vector2d(v.x, v.y);
if (!viewport.Contains((int)v.x, (int)v.y)) continue;
if (projector.GetDepthValue((int)v.x, (int)v.y) - v.z < eps) continue;
double dis = (u - currPos).Length();
if (dis < minDis)
{
minIndex = i;
minDis = dis;
}
}
if (minIndex == -1) return -1;
//FormMain.CurrForm.OutputText("selected vertex: " + minIndex.ToString());
if ((Control.ModifierKeys & Keys.Shift) == Keys.Shift)
m.Flag[minIndex] = (byte)1;
else if ((Control.ModifierKeys & Keys.Control) == Keys.Control)
m.Flag[minIndex] = (byte)0;
else
{
for (int i = 0; i < m.VertexCount; i++) m.Flag[i] = (byte)0;
m.Flag[minIndex] = (byte)1;
}
return minIndex;
}
private void SelectVertexByRect()
{
Vector2d minV = Vector2d.Min(mouseDownPosition, currMousePosition);
Vector2d size = Vector2d.Max(mouseDownPosition, currMousePosition) - minV;
Rectangle rect = new Rectangle((int)minV.x, (int)minV.y, (int)size.x, (int)size.y);
Rectangle viewport = new Rectangle(0, 0, this.Width, this.Height);
OpenGLProjector projector = new OpenGLProjector();
Mesh m = currMeshRecord.Mesh;
bool laser = Program.toolsProperty.Laser;
double eps = Program.toolsProperty.DepthTolerance;
if ((Control.ModifierKeys & Keys.Shift) == Keys.Shift)
for (int i = 0, j = 0; i < m.VertexCount; i++, j += 3)
{
Vector3d v = projector.Project(m.VertexPos, j);
if (viewport.Contains((int)v.x, (int)v.y))
{
bool flag = rect.Contains((int)v.x, (int)v.y);
flag &= (laser || projector.GetDepthValue((int)v.x, (int)v.y) - v.z >= eps);
if (flag) m.Flag[i] = (byte)1;
}
}
else if ((Control.ModifierKeys & Keys.Control) == Keys.Control)
for (int i = 0, j = 0; i < m.VertexCount; i++, j += 3)
{
Vector3d v = projector.Project(m.VertexPos, j);
if (viewport.Contains((int)v.x, (int)v.y))
{
bool flag = rect.Contains((int)v.x, (int)v.y);
flag &= (laser || projector.GetDepthValue((int)v.x, (int)v.y) - v.z >= eps);
if (flag) m.Flag[i] = (byte)0;
}
}
else
for (int i = 0, j = 0; i < m.VertexCount; i++, j += 3)
{
Vector3d v = projector.Project(m.VertexPos, j);
if (viewport.Contains((int)v.x, (int)v.y))
{
bool flag = rect.Contains((int)v.x, (int)v.y);
flag &= (laser || projector.GetDepthValue((int)v.x, (int)v.y) - v.z >= eps);
m.Flag[i] = (byte)((flag) ? 1 : 0);
}
}
}
private int SelectFaceByPoint(Vector2d screen_pos)
{
Rectangle viewport = new Rectangle(0, 0, this.Width, this.Height);
OpenGLProjector projector = new OpenGLProjector();
Mesh m = currMeshRecord.Mesh;
bool laser = Program.toolsProperty.Laser;
double eps = Program.toolsProperty.DepthTolerance;
int minIndex = -1;
for (int i = 0, j = 0; i < m.FaceCount; i++, j += 3)
{
int c0 = m.FaceIndex[j]*3;
int c1 = m.FaceIndex[j + 1]*3;
int c2 = m.FaceIndex[j + 2]*3;
Vector3d v0 = projector.Project(m.VertexPos, c0);
Vector3d v1 = projector.Project(m.VertexPos, c1);
Vector3d v2 = projector.Project(m.VertexPos, c2);
Vector2d u0 = new Vector2d(v0.x, v0.y);
Vector2d u1 = new Vector2d(v1.x, v1.y);
Vector2d u2 = new Vector2d(v2.x, v2.y);
if (!viewport.Contains((int)v0.x, (int)v0.y)) continue;
if (projector.GetDepthValue((int)v0.x, (int)v0.y) - v0.z < eps) continue;
if (PointInTriangle(screen_pos, u0, u1, u2))
{
minIndex = i;
break;
}
}
return minIndex;
}