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| author | Tavian Barnes <tavianator@gmail.com> | 2009-04-12 19:06:50 +0000 |
|---|---|---|
| committer | Tavian Barnes <tavianator@gmail.com> | 2009-04-12 19:06:50 +0000 |
| commit | b9e19e076662ae5743b9c81eb238fe11204f6dbd (patch) | |
| tree | 2a29279adf20a2b8291f56f341695db07e861e98 /libdimension/geometry.c | |
| parent | 8a4f9e902cf64f97ee2f15fa3940a7cf183a27b7 (diff) | |
| download | dimension-b9e19e076662ae5743b9c81eb238fe11204f6dbd.tar.xz | |
Add some comments.
Diffstat (limited to 'libdimension/geometry.c')
| -rw-r--r-- | libdimension/geometry.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/libdimension/geometry.c b/libdimension/geometry.c index 5786f57..0eab10b 100644 --- a/libdimension/geometry.c +++ b/libdimension/geometry.c @@ -20,6 +20,7 @@ #include "dimension.h" +/* Construct a vector from x, y, and z. Just for convienence. */ dmnsn_vector dmnsn_vector_construct(dmnsn_scalar x, dmnsn_scalar y, dmnsn_scalar z) { @@ -27,6 +28,7 @@ dmnsn_vector_construct(dmnsn_scalar x, dmnsn_scalar y, dmnsn_scalar z) return v; } +/* Add two vectors */ dmnsn_vector dmnsn_vector_add(dmnsn_vector lhs, dmnsn_vector rhs) { @@ -36,6 +38,7 @@ dmnsn_vector_add(dmnsn_vector lhs, dmnsn_vector rhs) return v; } +/* Subtract two vectors */ dmnsn_vector dmnsn_vector_sub(dmnsn_vector lhs, dmnsn_vector rhs) { @@ -45,6 +48,7 @@ dmnsn_vector_sub(dmnsn_vector lhs, dmnsn_vector rhs) return v; } +/* Multiply a vector by a scalar */ dmnsn_vector dmnsn_vector_mul(dmnsn_scalar lhs, dmnsn_vector rhs) { @@ -52,6 +56,7 @@ dmnsn_vector_mul(dmnsn_scalar lhs, dmnsn_vector rhs) return v; } +/* Divide a vector by a scalar */ dmnsn_vector dmnsn_vector_div(dmnsn_vector lhs, dmnsn_scalar rhs) { @@ -59,12 +64,14 @@ dmnsn_vector_div(dmnsn_vector lhs, dmnsn_scalar rhs) return v; } +/* Dot product */ dmnsn_scalar dmnsn_vector_dot(dmnsn_vector lhs, dmnsn_vector rhs) { return lhs.x*rhs.x + lhs.y*rhs.y + lhs.z*rhs.z; } +/* Cross product */ dmnsn_vector dmnsn_vector_cross(dmnsn_vector lhs, dmnsn_vector rhs) { @@ -74,6 +81,7 @@ dmnsn_vector_cross(dmnsn_vector lhs, dmnsn_vector rhs) return v; } +/* A point on a line, l. Returns l.x0 + t*l.n */ dmnsn_vector dmnsn_line_point(dmnsn_line l, dmnsn_scalar t) { |