void JSpline::GeneratePixels()
{
float x, y;
float inc = SMALL_NUMBER;
mPixels.clear();
x = mMidPoints[1].x;
y = mMidPoints[1].y;
Point newPt(x, y);
Point extraPt;
mPixels.push_back(newPt);
for (int n=0; n < (int)mMidPoints.size()-3; n++)
{
float t = inc;
while (t <= 1.0f)
{
PointOnCurve(newPt, t, mMidPoints[n], mMidPoints[n+1], mMidPoints[n+2], mMidPoints[n+3]);
float dx = newPt.x-x;
float dy = newPt.y-y;
float dist = sqrtf(dx*dx + dy*dy);
if (dist >= MID_POINT_THRESHOLD)
{
//
//extraPt.x = (newPt.x+x)/2;
//extraPt.y = (newPt.y+y)/2;
//mPixels.push_back(extraPt);
//
mPixels.push_back(newPt);
x = newPt.x;
y = newPt.y;
}
t += inc;
}
}
mCount = mPixels.size();
}
/// <summary>
/// Generate spline series of points from array of keyframe points
/// </summary>
/// <param name="points">array of key frame points</param>
/// <param name="numPoints">number of points to generate in spline between each point</param>
/// <returns>array of points describing spline</returns>
void interpolar(vector<Point2f> &points, vector<Point2f> &splinePoints, int numNewPoints) {
int i, j, numPunOri;
if (numNewPoints < 1) return;
numPunOri = points.size();
splinePoints.clear();
if (numPunOri < 4) {
for (i = 0 ; i < numPunOri ; i++) splinePoints.push_back(points[i]);
}
else {
splinePoints.push_back(points[0]);
for (i = 0 ; i < numPunOri - 3 ; i++) {
for (j = 0 ; j < numNewPoints ; j++) {
splinePoints.push_back(
PointOnCurve(points[i], points[i + 1], points[i + 2], points[i + 3], ((float)1 / numNewPoints) * j)
);
}
}
splinePoints.push_back(points[numPunOri - 2]);
splinePoints.push_back(points[numPunOri - 1]);
}
}