| 50 |
|
int |
| 51 |
|
new_input_direction(double new_theta, double new_phi) |
| 52 |
|
{ |
| 53 |
– |
if (!input_orient) /* check input orientation */ |
| 54 |
– |
input_orient = 1 - 2*(new_theta > 90.); |
| 55 |
– |
else if (input_orient > 0 ^ new_theta < 90.) { |
| 56 |
– |
fprintf(stderr, |
| 57 |
– |
"%s: Cannot handle input angles on both sides of surface\n", |
| 58 |
– |
progname); |
| 59 |
– |
return(0); |
| 60 |
– |
} |
| 53 |
|
/* normalize angle ranges */ |
| 54 |
|
while (new_theta < -180.) |
| 55 |
|
new_theta += 360.; |
| 59 |
|
new_theta = -new_theta; |
| 60 |
|
new_phi += 180.; |
| 61 |
|
} |
| 70 |
– |
if ((theta_in_deg = new_theta) < 1.0) |
| 71 |
– |
return(1); /* don't rely on phi near normal */ |
| 62 |
|
while (new_phi < 0) |
| 63 |
|
new_phi += 360.; |
| 64 |
|
while (new_phi >= 360.) |
| 65 |
|
new_phi -= 360.; |
| 66 |
+ |
/* check input orientation */ |
| 67 |
+ |
if (!input_orient) |
| 68 |
+ |
input_orient = 1 - 2*(new_theta > 90.); |
| 69 |
+ |
else if (input_orient > 0 ^ new_theta < 90.) { |
| 70 |
+ |
fprintf(stderr, |
| 71 |
+ |
"%s: Cannot handle input angles on both sides of surface\n", |
| 72 |
+ |
progname); |
| 73 |
+ |
return(0); |
| 74 |
+ |
} |
| 75 |
+ |
if ((theta_in_deg = new_theta) < 1.0) |
| 76 |
+ |
return(1); /* don't rely on phi near normal */ |
| 77 |
|
if (single_plane_incident > 0) /* check input coverage */ |
| 78 |
|
single_plane_incident = (round(new_phi) == round(phi_in_deg)); |
| 79 |
|
else if (single_plane_incident < 0) |
