/// <summary>
/// Convert a 3d point to a 2d point for GetPreview() methods.
/// </summary>
/// <param name="Point">Source 3D point.</param>
/// <param name="Min">Minimum vector positions (used to centre render in viewport).</param>
/// <param name="Max">Maximum vector positions (used to centre render in viewport).</param>
/// <param name="ViewWidth">Width of viewport.</param>
/// <param name="ViewHeight">Height of viewport.</param>
/// <param name="RotateY">Amount to rotate around Y axis in degrees.</param>
/// <returns>2D point for plotting in viewport</returns>
private Point Get2dPoint(FaceUVTool.DFPurePoint Point, Vector3 Min, Vector3 Max, int ViewWidth, int ViewHeight, float RotateY)
{
// Get fractional point
DFMesh.DFPoint point3d;
point3d.X = Point.x >> 8;
point3d.Y = Point.y >> 8;
point3d.Z = Point.z >> 8;
// Rotate around Y axis
const double PIOVER180 = Math.PI / 180.0;
double degrees = RotateY;
double cDegrees = degrees * PIOVER180;
double cosDegrees = Math.Cos(cDegrees);
double sinDegrees = Math.Sin(cDegrees);
double xrot = (point3d.X * cosDegrees) + (point3d.Z * sinDegrees);
double zrot = (point3d.X * -sinDegrees) + (point3d.Z * cosDegrees);
point3d.X = (float)xrot;
point3d.Z = (float)zrot;
// Centre vector
float transX = (float)(Min.X + ((Max.X - Min.X) / 2));
float transY = (float)(Min.Y + ((Max.Y - Min.Y) / 2));
float transZ = (float)(Min.Z + ((Max.Z - Min.Z) / 2));
point3d.X -= transX;
point3d.Y -= transY;
point3d.Z -= transZ;
// Scale vector (large objects become smaller, small objects grow larger)
Vector3 size = new Vector3(Max.X - Min.X, Max.Y - Min.Y, Max.Z - Min.Z);
float scale = 1000.0f / (float)((size.X + size.Y + size.Z) / 3);
point3d.X *= scale;
point3d.Y *= scale;
point3d.Z *= scale;
// Set camera position and zoom
float zoom = (float)(ViewWidth / 0.5);
float camx = 0;
float camy = 0;
float camz = (float)(Max.Z - 4500);
// Translate point into 2d space
float z = point3d.Z - camz;
Point point2d = new Point();
point2d.X = ViewWidth / 2 - (int)((camx - point3d.X) / z * zoom);
point2d.Y = ViewHeight / 2 - (int)((camy - point3d.Y) / z * zoom);
return(point2d);
}
/// <summary>
/// Write a single point to buffer.
/// </summary>
/// <param name="srcPoint">Source point.</param>
/// <param name="dstPlane">Destination plane buffer.</param>
/// <implementation>
/// Vector coordinates are divided by 256.0f, and texture coordinates by 16.0f.
/// </implementation>
private int WritePoint(ref FaceUVTool.DFPurePoint srcPoint, ref DFPlaneBuffer dstPlane)
{
// Copy point data
int pointPos = dstPlane.PointCount;
dstPlane.PointBuffer[pointPos].X = srcPoint.x / pointDivisor;
dstPlane.PointBuffer[pointPos].Y = srcPoint.y / pointDivisor;
dstPlane.PointBuffer[pointPos].Z = srcPoint.z / pointDivisor;
dstPlane.PointBuffer[pointPos].NX = srcPoint.nx / pointDivisor;
dstPlane.PointBuffer[pointPos].NY = srcPoint.ny / pointDivisor;
dstPlane.PointBuffer[pointPos].NZ = srcPoint.nz / pointDivisor;
dstPlane.PointBuffer[pointPos].U = srcPoint.u / textureDivisor;
dstPlane.PointBuffer[pointPos].V = srcPoint.v / textureDivisor;
dstPlane.PointCount++;
return(pointPos);
}
/// <summary>
/// Write a single point to buffer.
/// </summary>
/// <param name="SrcPoint">Source point.</param>
/// <param name="DstPlane">Destination plane buffer.</param>
/// <implementation>
/// Vector coordinates are divided by 256.0f, and texture coordinates by 16.0f.
/// </implementation>
private int WritePoint(ref FaceUVTool.DFPurePoint SrcPoint, ref DFPlaneBuffer DstPlane)
{
// Copy point data
int pointPos = DstPlane.PointCount;
DstPlane.PointBuffer[pointPos].X = SrcPoint.x / PointDivisor;
DstPlane.PointBuffer[pointPos].Y = SrcPoint.y / PointDivisor;
DstPlane.PointBuffer[pointPos].Z = SrcPoint.z / PointDivisor;
DstPlane.PointBuffer[pointPos].NX = SrcPoint.nx / PointDivisor;
DstPlane.PointBuffer[pointPos].NY = SrcPoint.ny / PointDivisor;
DstPlane.PointBuffer[pointPos].NZ = SrcPoint.nz / PointDivisor;
DstPlane.PointBuffer[pointPos].U = SrcPoint.u / TextureDivisor;
DstPlane.PointBuffer[pointPos].V = SrcPoint.v / TextureDivisor;
DstPlane.PointCount++;
return(pointPos);
}
