air-hockey-puck: wip

[reprap-play.git] / funcs.scad.cpp

diff --git a/funcs.scad.cpp b/funcs.scad.cpp
deleted file mode 100644 (file)
index 92292be..0000000
--- a/funcs.scad.cpp
+++ /dev/null
@@ -1,81 +0,0 @@
-// -*- C -*-
-
-function vecdiff2d(a,b) = [b[0]-a[0], b[1]-a[1]];
-function vecdiff(a,b)   = [b[0]-a[0], b[1]-a[1], b[2]-a[2]];
-
-#define dsq(i) (a[i]-b[i])*(a[i]-b[i])
-function dist2d(a,b) = sqrt(dsq(0) + dsq(1));
-function dist(a,b)   = sqrt(dsq(0) + dsq(1) + dsq(2));
-#undef dsq
-
-#define vsq(i) (v[i]*v[i])
-function vectorlen2d(v) = sqrt(vsq(0) + vsq(1));
-function vectorlen(v)   = sqrt(vsq(0) + vsq(1) + vsq(2));
-#undef vsq
-
-function unitvector2d(v) = v / vectorlen2d(v);
-function unitvector(v)   = v / vectorlen(v);
-
-// | m[0][0] m[0][1] |
-// | m[1][0] m[1][1] |
-function determinant2(m) = (m[0][0] * m[1][1] - m[0][1] * m[1][0]);
-
-function clockwise2d(v) = [v[1], -v[0]];
-
-// intersection of lines p1..p2 and p3..p4
-function line_intersection_2d(p1,p2,p3,p4) = [
-  // from https://en.wikipedia.org/wiki/Line%E2%80%93line_intersection#Given_two_points_on_each_line
-  #define XY12 determinant2([p1,p2])
-  #define XY34 determinant2([p3,p4])
-  #define XU12 QU(0,1,2)
-  #define XU34 QU(0,3,4)
-  #define YU12 QU(1,1,2)
-  #define YU34 QU(1,3,4)
-  #define QU(c,i,j) determinant2([[ p##i[c], 1 ], \
-                                [ p##j[c], 1 ]])
-  #define DENOM \
-   determinant2([[ XU12, YU12 ], \
-                [ XU34, YU34 ]])
-   //----
-   determinant2([[ XY12, XU12 ],
-                [ XY34, XU34 ]]) / DENOM,
-   determinant2([[ XY12, YU12 ],
-                [ XY34, YU34 ]]) / DENOM,
-   ];
-  #undef XY12
-  #undef XY34
-  #undef XU12
-  #undef XU34
-  #undef YU12
-  #undef YU34
-  #undef QU
-  #undef DENOM
-
-
-function circle_point(c, r, alpha) = [ c[0] + r * cos(alpha),
-                                      c[1] + r * sin(alpha) ];
-
-#define d     (dist2d(a,c))
-#define alpha (atan2(a[1]-c[1],a[0]-c[0]))
-#define gamma (asin(r / d))
-#define beta  (alpha + 90 - gamma)
-
-function tangent_intersect_beta(c,r,a) =
-              beta;
-
-function tangent_intersect_b(c,r,a) =
-              circle_point(c, r, beta);
-#undef d
-#undef alpha
-#undef gamma
-#undef beta
-
-function tangents_intersect_beta(cbig,rbig,csmall,rsmall) =
-        tangent_intersect_beta(cbig,rbig-rsmall,csmall);
-
-function reflect_in_y(p) = [-p[0], p[1]];
-
-function angle_map_range(in,base) =
-  in <  base       ? in + 360 :
-  in >= base + 360 ? in - 360 :
-  in;