src/bz/math/vector.c

   1 #include <bz/math/vector.h>
   2
   3 #include <bz/math/math.h>
   4
   5 void bzVectorCopy(BZVector *vectorOut, const BZVector *vector) {
   6         float x = vector->x;
   7         float y = vector->y;
   8         bzVectorSet(vectorOut, x, y);
   9 }
  10
  11 void bzVectorMakeAngle(BZVector *vectorOut, float angle) {
  12         float x = bzCosine(angle);
  13         float y = bzSine(angle);
  14         bzVectorSet(vectorOut, x, y);
  15
  16 }
  17
  18 void bzVectorInverse(BZVector *vectorOut, const BZVector *vector) {
  19         float x = -(vector->x);
  20         float y = -(vector->y);
  21         bzVectorSet(vectorOut, x, y);
  22 }
  23
  24 void bzVectorTangent(BZVector *vectorOut, const BZVector *vector) {
  25         float x = -(vector->y);
  26         float y = vector->x;
  27         bzVectorSet(vectorOut, x, y);
  28 }
  29
  30 void bzVectorAdd(BZVector *vectorOut, const BZVector *vector1, const BZVector *vector2) {
  31         float x = vector1->x + vector2->x;
  32         float y = vector1->y + vector2->y;
  33         bzVectorSet(vectorOut, x, y);
  34 }
  35
  36 void bzVectorSubtract(BZVector *vectorOut, const BZVector *vector1, const BZVector *vector2) {
  37         float x = vector1->x - vector2->x;
  38         float y = vector1->y - vector2->y;
  39         bzVectorSet(vectorOut, x, y);
  40 }
  41
  42 void bzVectorScale(BZVector *vectorOut, const BZVector *vector, float scale) {
  43         float x = vector->x * scale;
  44         float y = vector->y * scale;
  45         bzVectorSet(vectorOut, x, y);
  46 }
  47
  48 void bzVectorNormalized(BZVector *vectorOut, const BZVector *vector) {
  49         float magnitude = bzVectorMagnitude(vector);
  50         float x = vector->x / magnitude;
  51         float y = vector->y / magnitude;
  52         bzVectorSet(vectorOut, x, y);
  53 }
  54
  55 float bzVectorMagnitude(const BZVector *vector) {
  56         float sqMagnitude = bzVectorMagnitudeSquared(vector);
  57         float magnitude = bzSqrt(sqMagnitude);
  58         return magnitude;
  59 }
  60
  61 float bzVectorMagnitudeSquared(const BZVector *vector) {
  62         return bzVectorDot(vector, vector);
  63 }
  64
  65 float bzVectorDot(const BZVector *vector1, const BZVector *vector2) {
  66         float dot = (vector1->x * vector2->x) + (vector1->y * vector2->y);
  67         return dot;
  68 }
  69
  70 float bzVectorCross(const BZVector *vector1, const BZVector *vector2) {
  71         float crossZ = (vector1->x * vector2->y) - (vector1->y * vector2->x);
  72         return crossZ;
  73 }
  74
  75 void bzVectorLerp(BZVector *vectorOut, const BZVector *vector1, const BZVector *vector2, float t) {
  76         vectorOut->x = bzLerp(vector1->x, vector2->x, t);
  77         vectorOut->y = bzLerp(vector1->y, vector2->y, t);
  78 }
  79