public void BuildVertexBuffer(Device dx_device, Vector2 ViewerPos)
{
// 보이지 않는 벽들을 가려야 할 필요가 있다.
if (m_VB != null)
{
m_VB.Dispose();
m_VB = null;
}
List<Geometry2D.LineSegment> lines = new List<DxLib.Geometry2D.LineSegment>();
foreach (Geometry2D.LineSegment line in m_Walls)
{
Vector2 p1 = line.p1;
Vector2 p2 = line.p2;
double angle1, angle2;
p1 -= ViewerPos;
p2 -= ViewerPos;
angle1 = Math.Atan2(p1.Y, p1.X);
angle2 = Math.Atan2(p2.Y, p2.X);
double adiff = angle2 - angle1;
if (adiff < 0) adiff += Math.PI * 2;
if (adiff > Math.PI)
{
adiff = angle1; angle1 = angle2; angle2 = adiff;
Vector2 p = p1; p1 = p2; p2 = p;
}
Geometry2D.LineSegment ll = new DxLib.Geometry2D.LineSegment(p1,p2);
if (angle1 > angle2)
{
Vector2 p;
ll.GetIntersect(Math.PI, out p);
Geometry2D.LineSegment l1 = new DxLib.Geometry2D.LineSegment(p1, p);
Geometry2D.LineSegment l2 = new DxLib.Geometry2D.LineSegment(p, p2);
l1.p1 += ViewerPos;
l1.p2 += ViewerPos;
l2.p1 += ViewerPos;
l2.p2 += ViewerPos;
lines.Add(l1);
lines.Add(l2);
}
else
{
ll.p1 += ViewerPos;
ll.p2 += ViewerPos;
lines.Add(ll);
}
}
lines.Sort(
delegate(Geometry2D.LineSegment l1, Geometry2D.LineSegment l2)
{
return l1.Angle1.CompareTo(l2.Angle1);
});
m_nPrimitives = lines.Count * 2;
m_VB = new VertexBuffer(typeof(CustomVertex.PositionColored), m_nPrimitives * 3, dx_device, Usage.None,
CustomVertex.PositionColored.Format, Pool.Default);
CustomVertex.PositionColored[] array = (CustomVertex.PositionColored[])m_VB.Lock(0, LockFlags.None);
for (int i = 0; i < lines.Count(); i++)
{
int color = Color.Red.ToArgb();
array[i * 6] = new CustomVertex.PositionColored(lines[i].p1.X, 0, lines[i].p1.Y, color);
array[i * 6 + 1] = new CustomVertex.PositionColored(lines[i].p1.X, 1, lines[i].p1.Y, color);
array[i * 6 + 2] = new CustomVertex.PositionColored(lines[i].p2.X, 0, lines[i].p2.Y, color);
array[i * 6 + 3] = new CustomVertex.PositionColored(lines[i].p1.X, 1, lines[i].p1.Y, color);
array[i * 6 + 4] = new CustomVertex.PositionColored(lines[i].p2.X, 0, lines[i].p2.Y, color);
array[i * 6 + 5] = new CustomVertex.PositionColored(lines[i].p2.X, 1, lines[i].p2.Y, color);
}
m_VB.Unlock();
}
private void AddWallInternal(Vector2 p1, Vector2 p2)
{
Geometry2D.LineSegment line = new DxLib.Geometry2D.LineSegment(p1, p2);
foreach (Geometry2D.LineSegment w in m_Walls)
{
Vector2 ptr;
if (line.intersect(w, out ptr))
{
AddWallInternal(p1, ptr);
AddWallInternal(ptr, p2);
return;
}
}
m_Walls.Add(line);
}
