/// <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>
/// Find corner points from a pure face - this reduces the number of points in the final strip.
/// </summary>
/// <param name="pointsIn">Source points to find corners of.</param>
/// <returns>Number of corners found in this point array.</returns>
private int GetCornerPoints(ref FaceUVTool.DFPurePoint[] pointsIn)
{
int cornerCount = 0;
Vector3 v0, v1, v2, l0, l1;
int pointCount = pointsIn.Length;
for (int point = 0; point < pointCount; point++)
{
// Determine angle between this point and next two points
int cornerIndex;
if (point < pointCount - 2)
{
v0 = new Vector3(pointsIn[point].x, pointsIn[point].y, pointsIn[point].z);
v1 = new Vector3(pointsIn[point + 1].x, pointsIn[point + 1].y, pointsIn[point + 1].z);
v2 = new Vector3(pointsIn[point + 2].x, pointsIn[point + 2].y, pointsIn[point + 2].z);
cornerIndex = point + 1;
}
else if (point < pointCount - 1)
{
v0 = new Vector3(pointsIn[point].x, pointsIn[point].y, pointsIn[point].z);
v1 = new Vector3(pointsIn[point + 1].x, pointsIn[point + 1].y, pointsIn[point + 1].z);
v2 = new Vector3(pointsIn[0].x, pointsIn[0].y, pointsIn[0].z);
cornerIndex = point + 1;
}
else
{
v0 = new Vector3(pointsIn[point].x, pointsIn[point].y, pointsIn[point].z);
v1 = new Vector3(pointsIn[0].x, pointsIn[0].y, pointsIn[0].z);
v2 = new Vector3(pointsIn[1].x, pointsIn[1].y, pointsIn[1].z);
cornerIndex = 0;
}
// Construct direction vectors
l0 = v1 - v0;
l1 = v2 - v0;
// Check angle between direction vectors
double angle = l0.Angle(l1);
if (angle > 0.001f)
{
// Write corner point to buffer
cornerPointBuffer[cornerCount++] = cornerIndex;
}
}
return cornerCount;
}