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authorTavian Barnes <tavianator@gmail.com>2011-04-17 17:26:04 -0400
committerTavian Barnes <tavianator@gmail.com>2011-04-17 17:26:34 -0400
commit5c9680634b2999afdf43eaef5f367e98d3888f96 (patch)
treeddfa5bf64215b7946bc711b5ac650310488fdf27 /libdimension
parentb6d6b32a6f02965e1d088adaa6a0e051d620b878 (diff)
downloaddimension-5c9680634b2999afdf43eaef5f367e98d3888f96.tar.xz
Shrink the dmnsn_optimized_line type.
Diffstat (limited to 'libdimension')
-rw-r--r--libdimension/prtree.c18
1 files changed, 9 insertions, 9 deletions
diff --git a/libdimension/prtree.c b/libdimension/prtree.c
index 69fac24..4df8c63 100644
--- a/libdimension/prtree.c
+++ b/libdimension/prtree.c
@@ -627,8 +627,8 @@ dmnsn_delete_prtree(dmnsn_prtree *tree)
/** A line with pre-calculated reciprocals to avoid divisions. */
typedef struct dmnsn_optimized_line {
- dmnsn_line line;
- dmnsn_vector n_inv;
+ dmnsn_vector x0; /**< The origin of the line. */
+ dmnsn_vector n_inv; /**< The inverse of each component of the line's slope .*/
} dmnsn_optimized_line;
/** Precompute inverses for faster ray-box intersection tests. */
@@ -636,7 +636,7 @@ static inline dmnsn_optimized_line
dmnsn_optimize_line(dmnsn_line line)
{
dmnsn_optimized_line optline = {
- .line = line,
+ .x0 = line.x0,
.n_inv = dmnsn_new_vector(1.0/line.n.x, 1.0/line.n.y, 1.0/line.n.z)
};
return optline;
@@ -656,20 +656,20 @@ dmnsn_ray_box_intersection(dmnsn_optimized_line optline,
* unchanged.
*/
- double tx1 = (box.min.x - optline.line.x0.x)*optline.n_inv.x;
- double tx2 = (box.max.x - optline.line.x0.x)*optline.n_inv.x;
+ double tx1 = (box.min.x - optline.x0.x)*optline.n_inv.x;
+ double tx2 = (box.max.x - optline.x0.x)*optline.n_inv.x;
double tmin = dmnsn_min(tx1, tx2);
double tmax = dmnsn_max(tx1, tx2);
- double ty1 = (box.min.y - optline.line.x0.y)*optline.n_inv.y;
- double ty2 = (box.max.y - optline.line.x0.y)*optline.n_inv.y;
+ double ty1 = (box.min.y - optline.x0.y)*optline.n_inv.y;
+ double ty2 = (box.max.y - optline.x0.y)*optline.n_inv.y;
tmin = dmnsn_max(tmin, dmnsn_min(ty1, ty2));
tmax = dmnsn_min(tmax, dmnsn_max(ty1, ty2));
- double tz1 = (box.min.z - optline.line.x0.z)*optline.n_inv.z;
- double tz2 = (box.max.z - optline.line.x0.z)*optline.n_inv.z;
+ double tz1 = (box.min.z - optline.x0.z)*optline.n_inv.z;
+ double tz2 = (box.max.z - optline.x0.z)*optline.n_inv.z;
tmin = dmnsn_max(tmin, dmnsn_min(tz1, tz2));
tmax = dmnsn_min(tmax, dmnsn_max(tz1, tz2));