public void SetPoint(ref Form1.TPoint P, double x, double y, double z)
{
P.x = x;
P.y = y;
P.z = z;
P.w = 1.0;
}
public void ClipLine(Form1.TPoint v1, ref Form1.TPoint v2)
{
double num = (v1.w - this.near) / (v1.w - v2.w);
double x = num * v1.x + (1.0 - num) * v2.x;
double y = num * v1.y + (1.0 - num) * v2.y;
double z = num * v1.z + (1.0 - num) * v2.z;
this.SetPoint(ref v2, x, y, z);
}
public Form1.TPoint Generate3Dto2D(Form1.TPoint P, double[,] M)
{
Form1.TPoint tpoint;
tpoint.x = P.x * M[0, 0] + P.y * M[1, 0] + P.z * M[2, 0] + P.w * M[3, 0];
tpoint.y = P.x * M[0, 1] + P.y * M[1, 1] + P.z * M[2, 1] + P.w * M[3, 1];
tpoint.z = P.x * M[0, 2] + P.y * M[1, 2] + P.z * M[2, 2] + P.w * M[3, 2];
tpoint.w = P.x * M[0, 3] + P.y * M[1, 3] + P.z * M[2, 3] + P.w * M[3, 3];
return(tpoint);
}
public Form1.CSBits ClippingSecretCode(Form1.TPoint p)
{
Form1.CSBits csBits;
csBits.Above = p.y > 1.0;
csBits.Below = p.y < -1.0;
csBits.Right = p.x > 1.0;
csBits.Left = p.x < -1.0;
csBits.Front = p.z > 0.0;
csBits.Back = p.z < -1.0;
return(csBits);
}
public bool DoClip(ref Form1.TPoint p1, ref Form1.TPoint p2)
{
bool flag1;
bool flag2 = false;
do
{
flag1 = false;
Form1.CSBits csBits = this.ClippingSecretCode(p1);
Form1.CSBits b2 = this.ClippingSecretCode(p2);
if (this.ClippingOrOperation(csBits, b2) == 0)
{
flag2 = true;
}
else if (this.ClippingAndOperation(csBits, b2) > 0)
{
flag2 = false;
}
else
{
flag1 = true;
Form1.CSBits b1;
Form1.TPoint tpoint1;
Form1.TPoint tpoint2;
if (this.ClippingAndOperation(csBits, csBits) > 0)
{
b1 = csBits;
tpoint1 = p2;
tpoint2 = p1;
}
else
{
b1 = b2;
tpoint1 = p1;
tpoint2 = p2;
}
double x;
double y;
double z;
if (b1.Above)
{
x = tpoint1.x + (tpoint2.x - tpoint1.x) * (1.0 - tpoint1.y) / (tpoint2.y - tpoint1.y);
y = 1.0;
z = tpoint1.z + (tpoint2.z - tpoint1.z) * (1.0 - tpoint1.y) / (tpoint2.y - tpoint1.y);
}
else if (b1.Below)
{
x = tpoint1.x + (tpoint2.x - tpoint1.x) * (-1.0 - tpoint1.y) / (tpoint2.y - tpoint1.y);
y = -1.0;
z = tpoint1.z + (tpoint2.z - tpoint1.z) * (-1.0 - tpoint1.y) / (tpoint2.y - tpoint1.y);
}
else if (b1.Right)
{
x = 1.0;
y = tpoint1.y + (tpoint2.y - tpoint1.y) * (1.0 - tpoint1.x) / (tpoint2.x - tpoint1.x);
z = tpoint1.z + (tpoint2.z - tpoint1.z) * (1.0 - tpoint1.x) / (tpoint2.x - tpoint1.x);
}
else if (b1.Left)
{
x = -1.0;
y = tpoint1.y + (tpoint2.y - tpoint1.y) * (-1.0 - tpoint1.x) / (tpoint2.x - tpoint1.x);
z = tpoint1.z + (tpoint2.z - tpoint1.z) * (-1.0 - tpoint1.x) / (tpoint2.x - tpoint1.x);
}
else if (b1.Front)
{
x = tpoint1.x + (tpoint2.x - tpoint1.x) * (0.0 - tpoint1.z) / (tpoint2.z - tpoint1.z);
y = tpoint1.y + (tpoint2.y - tpoint1.y) * (0.0 - tpoint1.z) / (tpoint2.z - tpoint1.z);
z = 0.0;
}
else
{
x = tpoint1.x + (tpoint2.x - tpoint1.x) * (-1.0 - tpoint1.z) / (tpoint2.z - tpoint1.z);
y = tpoint1.y + (tpoint2.y - tpoint1.y) * (-1.0 - tpoint1.z) / (tpoint2.z - tpoint1.z);
z = -1.0;
}
if (this.ClippingAndOperation(b1, csBits) == this.ClippingOrOperation(b1, csBits))
{
this.SetPoint(ref p1, x, y, z);
this.ClippingSecretCode(p1);
}
else
{
this.SetPoint(ref p2, x, y, z);
this.ClippingSecretCode(p2);
}
}
}while (flag1);
return(flag2);
}
