public static float GetClipPlanePosition(ClipPlaneType plane)
{
float pos = 0;
switch(plane)
{
case ClipPlaneType.XMIN:
pos = clipVertices[24].Position.X;
break;
case ClipPlaneType.XPLUS:
pos = clipVertices[16].Position.X;
break;
case ClipPlaneType.YMIN:
pos = clipVertices[8].Position.Y;
break;
case ClipPlaneType.YPLUS:
pos = clipVertices[0].Position.Y;
break;
case ClipPlaneType.ZMIN:
pos = clipVertices[32].Position.Z;
break;
case ClipPlaneType.ZPLUS:
pos = clipVertices[40].Position.Z;
break;
}
return pos;
}
/// <summary>
/// Przesuwa płaszczyzny obcinające
/// </summary>
/// <param name="plane">Która płaszczyzna jest przesuwana</param>
/// <param name="value">Wartość przesunięcia w jednostkach sceny</param>
public void ShiftClipPlane(ClipPlaneType plane, float value)
{
int i = -1;
switch(plane)
{
case ClipPlaneType.XMIN:
i = 16;
break;
case ClipPlaneType.XPLUS:
i = 24;
break;
case ClipPlaneType.YMIN:
i = 0;
break;
case ClipPlaneType.YPLUS:
i = 8;
break;
case ClipPlaneType.ZMIN:
i = 40;
break;
case ClipPlaneType.ZPLUS:
i = 32;
break;
}
int j = i + 8;
if(i == 0)
{
float newValue = clipVertices[i].Position.Y + value;
if(newValue < clipVertices[i + 8].Position.Y)
{
value = clipVertices[i + 8].Position.Y - clipVertices[i].Position.Y;
}
for(; i < j; ++i)
{
clipVertices[i].Position.Y += value;
}
}
else if(i == 8)
{
float newValue = clipVertices[i].Position.Y + value;
if(newValue > clipVertices[i - 8].Position.Y)
{
value = clipVertices[i - 8].Position.Y - clipVertices[i].Position.Y;
}
for(; i < j; ++i)
{
clipVertices[i].Position.Y += value;
}
}
else if(i == 16)
{
float newValue = clipVertices[i].Position.X + value;
if(newValue < clipVertices[i + 8].Position.X)
{
value = clipVertices[i + 8].Position.X - clipVertices[i].Position.X;
}
for(; i < j; ++i)
{
clipVertices[i].Position.X += value;
}
}
else if(i == 24)
{
float newValue = clipVertices[i].Position.X + value;
if(newValue > clipVertices[i - 8].Position.X)
{
value = clipVertices[i - 8].Position.X - clipVertices[i].Position.X;
}
for(; i < j; ++i)
{
clipVertices[i].Position.X += value;
}
}
else if(i == 32)
{
float newValue = clipVertices[i].Position.Z + value;
if(newValue > clipVertices[i + 8].Position.Z)
{
value = clipVertices[i + 8].Position.Z - clipVertices[i].Position.Z;
}
for(; i < j; ++i)
{
clipVertices[i].Position.Z += value;
}
}
else if(i == 40)
{
float newValue = clipVertices[i].Position.Z + value;
if(newValue < clipVertices[i - 8].Position.Z)
{
value = clipVertices[i - 8].Position.Z - clipVertices[i].Position.Z;
}
for(; i < j; ++i)
{
clipVertices[i].Position.Z += value;
}
}
}
