Revision: 52877
http://brlcad.svn.sourceforge.net/brlcad/?rev=52877&view=rev
Author: carlmoore
Date: 2012-10-05 20:11:53 +0000 (Fri, 05 Oct 2012)
Log Message:
-----------
fix spellings and change ie to i.e.
Modified Paths:
--------------
brlcad/trunk/src/librt/primitives/rec/rec.c
Modified: brlcad/trunk/src/librt/primitives/rec/rec.c
===================================================================
--- brlcad/trunk/src/librt/primitives/rec/rec.c 2012-10-05 20:09:00 UTC (rev
52876)
+++ brlcad/trunk/src/librt/primitives/rec/rec.c 2012-10-05 20:11:53 UTC (rev
52877)
@@ -21,7 +21,7 @@
/** @{ */
/** @file primitives/rec/rec.c
*
- * Intersect a ray with a Right Eliptical Cylinder. This is a special
+ * Intersect a ray with a Right Elliptical Cylinder. This is a special
* (but common) case of the TGC, which is handled separately.
*
* Algorithm -
@@ -77,7 +77,7 @@
* c = ((Px'**2 + Py'**2) - r**2) / (Dx'**2 + Dy'**2)
* r = 1.0
*
- * The qudratic formula yields k (which is constant):
+ * The quadratic formula yields k (which is constant):
*
* k = [ -b +/- sqrt(b**2 - 4 * c ] / 2.0
*
@@ -100,10 +100,10 @@
* NORMALS. Given the point W on the surface of the cylinder, what is
* the vector normal to the tangent plane at that point?
*
- * Map W onto the unit cylinder, ie: W' = S(R(W - V)).
+ * Map W onto the unit cylinder, i.e.: W' = S(R(W - V)).
*
* Plane on unit cylinder at W' has a normal vector N' of the same
- * value as W' in x and y, with z set to zero, ie, (Wx', Wy', 0)
+ * value as W' in x and y, with z set to zero, i.e., (Wx', Wy', 0)
*
* The plane transforms back to the tangent plane at W, and this new
* plane (on the original cylinder) has a normal vector of N, viz:
@@ -459,7 +459,7 @@
if (ZERO(dprime[X]) && ZERO(dprime[Y]))
goto check_plates;
- /* Find roots of the equation, using forumla for quadratic w/ a=1 */
+ /* Find roots of the equation, using formula for quadratic w/ a=1 */
{
fastf_t b; /* coeff of polynomial */
fastf_t root; /* root of radical */
@@ -627,7 +627,7 @@
if (ap) RT_CK_APPLICATION(ap);
- /* for each ray/right_eliptical_cylinder pair */
+ /* for each ray/right_elliptical_cylinder pair */
for (i = 0; i < n; i++) {
if (stp[i] == 0) continue; /* stp[i] == 0 signals skip ray */
@@ -642,7 +642,7 @@
if (ZERO(dprime[X]) && ZERO(dprime[Y]))
goto check_plates;
- /* Find roots of eqn, using forumla for quadratic w/ a=1 */
+ /* Find roots of eqn, using formula for quadratic w/ a=1 */
b = 2 * (dprime[X]*pprime[X] + dprime[Y]*pprime[Y]) *
(dx2dy2 = 1 / (dprime[X]*dprime[X] + dprime[Y]*dprime[Y]));
if ((root = b*b - 4 * dx2dy2 *
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