Merge branch 'fz-dev' into dev

applications/external/blackjack/common/dml.c

@@ -0,0 +1,53 @@
+#include "dml.h"
+#include <math.h>
+
+float lerp(float v0, float v1, float t) {
+    if(t > 1) return v1;
+    return (1 - t) * v0 + t * v1;
+}
+
+Vector lerp_2d(Vector start, Vector end, float t) {
+    return (Vector){
+        lerp(start.x, end.x, t),
+        lerp(start.y, end.y, t),
+    };
+}
+
+Vector quadratic_2d(Vector start, Vector control, Vector end, float t) {
+    return lerp_2d(lerp_2d(start, control, t), lerp_2d(control, end, t), t);
+}
+
+Vector vector_add(Vector a, Vector b) {
+    return (Vector){a.x + b.x, a.y + b.y};
+}
+
+Vector vector_sub(Vector a, Vector b) {
+    return (Vector){a.x - b.x, a.y - b.y};
+}
+
+Vector vector_mul_components(Vector a, Vector b) {
+    return (Vector){a.x * b.x, a.y * b.y};
+}
+
+Vector vector_div_components(Vector a, Vector b) {
+    return (Vector){a.x / b.x, a.y / b.y};
+}
+
+Vector vector_normalized(Vector a) {
+    float length = vector_magnitude(a);
+    return (Vector){a.x / length, a.y / length};
+}
+
+float vector_magnitude(Vector a) {
+    return sqrt(a.x * a.x + a.y * a.y);
+}
+
+float vector_distance(Vector a, Vector b) {
+    return vector_magnitude(vector_sub(a, b));
+}
+
+float vector_dot(Vector a, Vector b) {
+    Vector _a = vector_normalized(a);
+    Vector _b = vector_normalized(b);
+    return _a.x * _b.x + _a.y * _b.y;
+}