默认分段类型函数定义
'
'------------- Cubic -------------------
'
SegmentType("Cubic", x, x1, y1, x2, y2)
xbar = (x-x1)/(x2-x1);
ybar = 3*xbar^2 - 2*xbar^3;
y = y1+(y2-y1)*ybar;
return y;
endSegmentType
'
'------------- Quarter Sine ------------
'
SegmentType("Quarter-Sine", x, x1, y1, x2, y2)
xbar = (x-x1)/(x2-x1);
ybar = sin(PI*xbar/2);
y = y1+(y2-y1)*ybar;
return y;
endSegmentType
'
'------------- Quarter Cosine ------------
'
SegmentType("Quarter-Cosine", x, x1, y1, x2, y2)
xbar = (x-x1)/(x2-x1);
ybar = 1-cos(PI*xbar/2);
y = y1+(y2-y1)*ybar;
return y;
endSegmentType
'
'------------- Half Cosine ----------------
'
SegmentType("Half-Cosine", x, x1, y1, x2, y2)
xbar = (x-x1)/(x2-x1);
ybar = cos(PI*xbar);
y = (y2+y1)/2-((y2-y1)/2)*ybar;
return y;
endSegmentType
'
'------------- 3-4-5 Polynomial ----------------
'
SegmentType("3-4-5-Polynomial", x, x1, y1, x2, y2)
xbar = (x-x1)/(x2-x1);
ybar = 10*xbar^3 - 15*xbar^4 + 6*xbar^5;
y = y1+(y2-y1)*ybar;
return y;
endSegmentType
'
'------------- 4-5-6-7 Polynomial -------------
'
SegmentType("4-5-6-7-Polynomial", x, x1, y1, x2, y2)
xbar = (x-x1)/(x2-x1);
ybar = 35*xbar^4 - 84*xbar^5 + 70*xbar^6 - 20*xbar^7;
y = y1+(y2-y1)*ybar;
return y;
endSegmentType
'
'------------- 5-6-7-8-9 Polynomial -------------
'
SegmentType("5-6-7-8-9-Polynomial", x, x1, y1, x2, y2)
xbar = (x-x1)/(x2-x1);
ybar = 126*xbar^5 - 420*xbar^6 + 540*xbar^7 - 315*xbar^8 + 70*xbar^9;
y = y1+(y2-y1)*ybar;
return y;
endSegmentType
'
'------------- Cycloidal ----------------
'
SegmentType("Cycloidal", x, x1, y1, x2, y2)
xbar = (x-x1)/(x2-x1);
ybar = 1-cos(PI*xbar/2);
y = y1+(y2-y1)*ybar;
return y;
endSegmentType
'
'------------- Quadratic -------------------
'
SegmentType("Quadratic", x, x1, y1, x2, y2)
xbar = (x-x1)/(x2-x1);
ybar = xbar2;
y = y1+(y2-y1)*ybar;
return y;
endSegmentType
'
'------------- Linear -------------------
'
SegmentType("Linear", x, x1, y1, x2, y2)
slope = (y2-y1)/(x2-x1);
dy = slope*(x-x1);
val = y1 + dy;
return val;
endSegmentType
