Changeset 44f41997 for libcfa/src/vector.hfa

Timestamp:

Nov 11, 2019, 2:41:41 PM (4 years ago)

Author:

Dmitry Kobets <dkobets@…>

Branches:

ADT, arm-eh, ast-experimental, enum, forall-pointer-decay, jacob/cs343-translation, master, new-ast-unique-expr, pthread-emulation, qualifiedEnum

Children:

b545cad

Parents:

9a83ccd

git-author:

Dmitry Kobets <dkobets@…> (10/04/19 14:57:33)

git-committer:

Dmitry Kobets <dkobets@…> (11/11/19 14:41:41)

Message:

Add vector normalization

File:

• libcfa/src/vector.hfa (modified) (2 diffs)

libcfa/src/vector.hfa

@@ -29 +29 @@
     return [u.x - v.x, u.y - v.y];
 }
+vec2 ?*?(const vec2& v, float scalar) with (v) {
+    return [x * scalar, y * scalar];
+}
+vec2 ?/?(const vec2& v, float scalar) with (v) {
+    return [x / scalar, y / scalar];
+}
 
 /* //---------------------- Geometric Functions ---------------------- */
@@ -40 +46 @@
    return sqrt(dot(v, v));
 }
+
+// Returns the distance betwwen v1 and v2, i.e., length(p0 - p1).
+static inline float distance(const vec2& v1, const vec2& v2) {
+    return length(v1 - v2);
+}
+
+static inline vec2 normalize(const vec2& v) {
+    // TODO(dkobets) -- show them inversesqrt
+    // https://github.com/g-truc/glm/blob/269ae641283426f7f84116f2fe333472b9c914c9/glm/detail/func_exponential.inl
+    /* return v * inversesqrt(dot(v, v)); */
+    return v / sqrt(dot(v, v));
+}