public void AddWall(Vector2 p1, Vector2 p2)
{
double angle1, angle2;
angle1 = Math.Atan2(p1.Y, p1.X);
angle2 = Math.Atan2(p2.Y, p2.X);
double adiff = angle2 - angle1;
if (adiff < 0) adiff += Math.PI * 2.0;
if (adiff > Math.PI)
{
Vector2 tmp = p2; p2 = p1; p1 = tmp;
double tmp2 = angle1; angle1 = angle2; angle2 = tmp2;
}
if (angle1 < 0) angle1 += Math.PI * 2.0;
if (angle2 < 0) angle2 += Math.PI * 2.0;
if (angle2 < angle1)
{
DxLib.Geometry2D.Line line = new DxLib.Geometry2D.Line(p1, p2);
Vector2 tmp = line.GetIntersection(0.0);
addit(tmp, p2);
addit(p1, tmp);
}
else
{
addit(p1, p2);
}
}
public VertexBuffer BuildShadowVertex(Device dx_device, Vector2 ViewerPos)
{
Vector2[] Boundary = new Vector2[4] {
new Vector2(3,3),
new Vector2(-3,3),
new Vector2(-3,-3),
new Vector2(3,-3),
};
List<CustomVertex.PositionColored> list = new List<CustomVertex.PositionColored>();
foreach (Vector2[] w in m_Walls)
{
Vector2 p1 = w[0] - ViewerPos, p2 = w[1] - ViewerPos;
double a1 = Math.Atan2(p1.Y,p1.X), a2 = Math.Atan2(p2.Y,p2.X);
double adiff = a2 - a1;
if (adiff < 0) adiff += Math.PI * 2.0;
if (adiff > Math.PI)
{
adiff = a2; a2 = a1; a1 = adiff;
Vector2 p = p2; p2 = p1; p1 = p;
}
Geometry2D.Line line = new DxLib.Geometry2D.Line(p1, p2);
if (a2 < a1) a2 += Math.PI * 2;
for (int i = 0; i < 4; i++)
{
double angle = Math.Atan2(Boundary[i].Y - ViewerPos.Y, Boundary[i].X - ViewerPos.X);
if(angle < a1) angle += Math.PI * 2;
if (angle < a2)
{
Vector2 p = line.GetIntersection(angle);
AddShadowVertex(list, p1, p, ViewerPos);
p1 = p;
}
}
AddShadowVertex(list, p1, p2, ViewerPos);
}
if (m_VB != null) m_VB.Dispose();
m_VB = new VertexBuffer(typeof(CustomVertex.PositionColored), list.Count() + 1, dx_device, Usage.None,
CustomVertex.PositionColored.Format, Pool.Managed);
m_VertexCount = list.Count();
CustomVertex.PositionColored[] array = (CustomVertex.PositionColored[])m_VB.Lock(0, LockFlags.None);
list.CopyTo(array);
m_VB.Unlock();
return m_VB;
}
void addit(Vector2 p1, Vector2 p2)
{
Vector2[] Boundary = new Vector2[4] {
new Vector2(3,3),
new Vector2(-3,3),
new Vector2(-3,-3),
new Vector2(3,-3),
};
float a1 = (float)Math.Atan2(p1.Y, p1.X);
if (a1 < 0) a1 += (float)Math.PI * 2;
float a2 = (float)Math.Atan2(p2.Y, p2.X);
if (a2 < 0) a2 += (float)Math.PI * 2;
DxLib.Geometry2D.Line line = new DxLib.Geometry2D.Line(p1,p2);
int cnt = 2;
for (int i = 0; i < 4; i++)
{
float angle = (float)Math.Atan2(Boundary[i].Y, Boundary[i].X);
if (angle < 0) angle += (float)Math.PI * 2;
if (a1 < angle && angle < a2)
{
cnt++;
}
}
Vector2[] Walls = new Vector2[cnt];
Walls[0] = p1;
Walls[cnt - 1] = p2;
cnt = 1;
for (int i = 0; i < 4; i++)
{
float angle = (float)Math.Atan2(Boundary[i].Y, Boundary[i].X);
if (angle < 0) angle += (float)Math.PI * 2;
if (a1 < angle && angle < a2)
{
Walls[cnt] = line.GetIntersection(angle);
cnt++;
}
}
m_Walls.Add(Walls);
}
