From: Mikko Rasa <tdb@tdb.fi>
Date: Fri, 21 Nov 2014 12:38:55 +0000 (+0200)
Subject: Convert the geometry part to use the new vector slicing API
X-Git-Url: http://git.tdb.fi/?p=libs%2Fmath.git;a=commitdiff_plain;h=34273ebb7de0a2150061c4e2bfa764e11ce740f7

Convert the geometry part to use the new vector slicing API

Everything being templates makes catching subtle compilation errors a bit
hard.
---

diff --git a/source/geometry/affinetransformation.h b/source/geometry/affinetransformation.h
index 15bd926..f01ac3a 100644
--- a/source/geometry/affinetransformation.h
+++ b/source/geometry/affinetransformation.h
@@ -175,13 +175,13 @@ inline AffineTransformation<T, D> invert(const AffineTransformation<T, D> &at)
 template<typename T, unsigned D>
 inline LinAl::Vector<T, D> AffineTransformation<T, D>::transform(const LinAl::Vector<T, D> &v) const
 {
-	return LinAl::Vector<T, D>(matrix*LinAl::Vector<T, D+1>(v, T(1)));
+	return (matrix*compose(v, T(1))).template slice<D>(0);
 }
 
 template<typename T, unsigned D>
 inline LinAl::Vector<T, D> AffineTransformation<T, D>::transform_linear(const LinAl::Vector<T, D> &v) const
 {
-	return LinAl::Vector<T, D>(matrix*LinAl::Vector<T, D+1>(v, T(0)));
+	return (matrix*compose(v, T(0))).template slice<D>(0);
 }
 
 template<typename T, unsigned D>
diff --git a/source/geometry/extrudedshape.h b/source/geometry/extrudedshape.h
index c00111a..400c52b 100644
--- a/source/geometry/extrudedshape.h
+++ b/source/geometry/extrudedshape.h
@@ -78,8 +78,8 @@ inline BoundingBox<T, D> ExtrudedShape<T, D>::get_axis_aligned_bounding_box() co
 {
 	BoundingBox<T, D-1> base_bbox = base->get_axis_aligned_bounding_box();
 	T half_length = length/T(2);
-	return BoundingBox<T, D>(LinAl::Vector<T, D>(base_bbox.get_minimum_point(), -half_length),
-		LinAl::Vector<T, D>(base_bbox.get_maximum_point(), half_length));
+	return BoundingBox<T, D>(compose(base_bbox.get_minimum_point(), -half_length),
+		compose(base_bbox.get_maximum_point(), half_length));
 }
 
 template<typename T, unsigned D>
@@ -90,7 +90,7 @@ inline bool ExtrudedShape<T, D>::contains(const LinAl::Vector<T, D> &point) cons
 	if(abs(point[D-1])>length/T(2))
 		return false;
 
-	return base->contains(LinAl::Vector<T, D-1>(point));
+	return base->contains(point.template slice<D-1>(0));
 }
 
 template<typename T, unsigned D>
@@ -108,7 +108,7 @@ inline unsigned ExtrudedShape<T, D>::get_intersections(const Ray<T, D> &ray, Sur
 	T half_length = length/T(2);
 	const LinAl::Vector<T, D> &ray_start = ray.get_start();
 	const LinAl::Vector<T, D> &ray_direction = ray.get_direction();
-	LinAl::Vector<T, D-1> base_dir(ray_direction);
+	LinAl::Vector<T, D-1> base_dir = ray_direction.template slice<D-1>(0);
 
 	/* If the ray does not degenerate to a point in the base space, it could
 	intersect the base shape. */
@@ -129,7 +129,7 @@ inline unsigned ExtrudedShape<T, D>::get_intersections(const Ray<T, D> &ray, Sur
 		if(limit>=offset)
 		{
 			T distortion = base_dir.norm();
-			Ray<T, D-1> base_ray(LinAl::Vector<T, D-1>(ray_start+ray_direction*offset),
+			Ray<T, D-1> base_ray((ray_start+ray_direction*offset).template slice<D-1>(0),
 				base_dir, (limit-offset)*distortion);
 
 			SurfacePoint<T, D-1> *base_points = 0;
@@ -145,7 +145,7 @@ inline unsigned ExtrudedShape<T, D>::get_intersections(const Ray<T, D> &ray, Sur
 				{
 					T x = offset+base_points[i].distance/distortion;
 					points[n].position = ray_start+ray_direction*x;
-					points[n].normal = LinAl::Vector<T, D>(base_points[i].normal, T(0));
+					points[n].normal = compose(base_points[i].normal, T(0));
 					points[n].distance = x;
 				}
 
@@ -165,7 +165,7 @@ inline unsigned ExtrudedShape<T, D>::get_intersections(const Ray<T, D> &ray, Sur
 				continue;
 
 			LinAl::Vector<T, D> p = ray_start+ray_direction*x;
-			if(base->contains(LinAl::Vector<T, D-1>(p)))
+			if(base->contains(p.template slice<D-1>(0)))
 			{
 				if(points)
 				{