I am trying to develop a program with the following aim.
A partial section of a circle which rotates around its center with constant angular velocity.
A circle with radius 150 mm (center located at 0,0) is equipped with known points along its circumference as shown in Figure below. A partial section (with constant length) should be identified and observed as it moves around the circle. With the below mentioned code (written in FORTRAN) i am able to locate two points (point A and B as they move with time but not able to capture points lying between these two points (A and B). Please check the code below. Thank you in advance.
c calculate the new position
c measure the Difference to the Center
difx1 = PointAx - originx
dify1 = PointAy - originy
difx2 = PointBx - originx
dify2 = PointBy - originy
c calculate the angle in RADIANs
c Theta = w * time w is angular velocity in rad/sec
radns = angvel * time
newx = cos(radns)
newy = sin(radns)
dx1 = (difx1 * newx) - (dify1 * newy)
dx2 = (difx2 * newx) - (dify2 * newy)
dy1 = (difx1 * newy) + (dify1 * newx)
dy2 = (difx2 * newy) + (dify2 * newx)
PointAx = originx + dx1
PointAy = originy + dy1
PointBx = originx + dx2
PointBy = originy + dy2
c check weather this node LIES in the heating Zone / HERE IS PROBLEM, How to locate region between two points A and B
if((points(1) .lt. PointBx) .or. (points(1) .gt. PointAx)) then
c NOT in the region
c DO Not apply anything
xin = .true.
c / HERE IS PROBLEM, How to locate region between two points A and B
if((points(2) .lt. PointAy) .or. (points(2) .gt. PointB)) then
C Not in the region
C DO Not apply anything
yin = .true.
IF (xin .and. yin) then
c WE are in the Region