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Borrowed LH's VectorVectors.

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Changed smoke trails a good bit.
This commit is contained in:
Zephaniah E. Hull 2001-04-06 18:37:23 +00:00
parent 1f25ab9ec2
commit a16b2c0070
6 changed files with 269 additions and 63 deletions
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17
libs/util/mathlib.c
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@ -104,6 +104,21 @@ PerpendicularVector (vec3_t dst, const vec3_t src)
#pragma optimize( "", off )
#endif
void VectorVectors(const vec3_t forward, vec3_t right, vec3_t up)
{
float d;
right[0] = forward[2];
right[1] = -forward[0];
right[2] = forward[1];
d = DotProduct(forward, right);
right[0] -= d * forward[0];
right[1] -= d * forward[1];
right[2] -= d * forward[2];
VectorNormalize(right);
CrossProduct(right, forward, up);
}
void
RotatePointAroundVector (vec3_t dst, const vec3_t dir, const vec3_t point,
@ -410,7 +425,7 @@ _VectorCopy (vec3_t in, vec3_t out)
}
void
CrossProduct (vec3_t v1, vec3_t v2, vec3_t cross)
CrossProduct (const vec3_t v1, const vec3_t v2, vec3_t cross)
{
cross[0] = v1[1] * v2[2] - v1[2] * v2[1];
cross[1] = v1[2] * v2[0] - v1[0] * v2[2];