1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
|
/*
* rectilinear (pinhole) projection model with distortion correction
*/
x : tan(m_view - c_view)$
y : tan(c_nick - m_nick)$
x_rot : y * sin(c_tilt) + x * cos(c_tilt)$
y_rot : y * cos(c_tilt) - x * sin(c_tilt)$
d : x_rot ^ 2 + y_rot ^ 2$
dist_fact : d ^ 2 * k1 + d * k0$
x_dist : x_rot * (1 + dist_fact) * scale$
y_dist : y_rot * (1 + dist_fact) * scale$
/*
* Some mangling for C code generation
*/
load("expr2c.mac")$
x_expand : trigexpand(x_dist)$
y_expand : trigexpand(y_dist)$
args: "double c_view, double c_nick, double c_tilt, double scale, double k0, double k1, double m_view, double m_nick"$
expr2c("ProjectionRectilinear::mac_x", args, x_expand)$
expr2c("ProjectionRectilinear::mac_y", args, y_expand)$
expr2c("ProjectionRectilinear::mac_x_dc_view", args, diff(x_expand, c_view))$
expr2c("ProjectionRectilinear::mac_x_dc_nick", args, diff(x_expand, c_nick))$
expr2c("ProjectionRectilinear::mac_x_dc_tilt", args, diff(x_expand, c_tilt))$
expr2c("ProjectionRectilinear::mac_x_dscale", args, diff(x_expand, scale))$
expr2c("ProjectionRectilinear::mac_x_dk0", args, diff(x_expand, k0))$
expr2c("ProjectionRectilinear::mac_x_dk1", args, diff(x_expand, k1))$
expr2c("ProjectionRectilinear::mac_y_dc_view", args, diff(y_expand, c_view))$
expr2c("ProjectionRectilinear::mac_y_dc_nick", args, diff(y_expand, c_nick))$
expr2c("ProjectionRectilinear::mac_y_dc_tilt", args, diff(y_expand, c_tilt))$
expr2c("ProjectionRectilinear::mac_y_dscale", args, diff(y_expand, scale))$
expr2c("ProjectionRectilinear::mac_y_dk0", args, diff(y_expand, k0))$
expr2c("ProjectionRectilinear::mac_y_dk1", args, diff(y_expand, k1))$
|
