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#include "global.h"
#include "m_olib.h"
/**
* Calculates the distances between `a` and `b`
*/
f32 distance_between(xyz_t* a, xyz_t* b) {
f32 dx = a->x - b->x;
f32 dy = a->y - b->y;
f32 dz = a->z - b->z;
return sqrtf(SQ(dx) + SQ(dy) + SQ(dz));
}
/**
* Calculates the distances between `a` and `b`, and outputs the vector
* created by the difference into `dest`
*/
f32 distance_between2(xyz_t* a, xyz_t* b, xyz_t* dest) {
dest->x = a->x - b->x;
dest->y = a->y - b->y;
dest->z = a->z - b->z;
return sqrtf(SQ(dest->x) + SQ(dest->y) + SQ(dest->z));
}
/**
* Calculates the distances on the xz plane between `a` and `b`
*/
f32 distance_2d(xyz_t* a, xyz_t* b) {
return sqrtf(SQ(a->x - b->x) + SQ(a->z - b->z));
}
/**
* Clamps `val` to a maximum of -`min` as `val` approaches zero, and a minimum of
* `min` as `val` approaches zero
*/
f32 never_zero(f32 val, f32 min) {
if (val < 0.0f) {
return CLAMP_MAX(val, -min);
} else {
return CLAMP_MIN(val, min);
}
}
/**
* Clamps `val` to a minimum of -`max` as `val` approaches -`max`, and a maximum of `max`
* as `val` approaches `max`
*/
f32 limiter(f32 val, f32 max) {
if (val < 0.0f) {
return CLAMP_MIN(val, -max);
} else {
return CLAMP_MAX(val, max);
}
}
/**
* Takes the difference of points b and a, and creates a normal vector
*/
xyz_t unitvector_by_2pos(xyz_t* a, xyz_t* b) {
xyz_t v1;
xyz_t v2;
f32 dist;
v1.x = b->x - a->x;
v1.y = b->y - a->y;
v1.z = b->z - a->z;
dist = never_zero(sqrtf(SQXYZ(v1)), 0.01f);
v2.x = v1.x / dist;
v2.y = v1.y / dist;
v2.z = v1.z / dist;
return v2;
}
/**
* Takes the spherical coordinate `sph`, and converts it into a x,y,z position
*/
xyz_t spolar2world(VecSph* sph) {
xyz_t v;
f32 sinPitch;
f32 cosPitch = cos_s(sph->pitch);
f32 sinYaw;
f32 cosYaw = cos_s(sph->yaw);
sinPitch = sin_s(sph->pitch);
sinYaw = sin_s(sph->yaw);
v.x = sph->r * sinPitch * sinYaw;
v.y = sph->r * cosPitch;
v.z = sph->r * sinPitch * cosYaw;
return v;
}
/**
* Takes the geographic point `geo` and converts it into a x,y,z position
*/
xyz_t sglobe2world(VecGeo* geo) {
VecSph sph;
sph.r = geo->r;
sph.pitch = 0x3FFF - geo->pitch;
sph.yaw = geo->yaw;
return spolar2world(&sph);
}
/**
* Takes the point `vec`, and converts it into a spherical coordinate
*/
VecSph world2spolar(xyz_t* vec) {
VecSph sph;
f32 distXZSq = SQ(vec->x) + SQ(vec->z);
f32 distXZ = sqrtf(distXZSq);
if ((distXZ == 0.0f) && (vec->y == 0.0f)) {
sph.pitch = 0;
} else {
sph.pitch = CAM_DEG_TO_BINANG(RAD_TO_DEG(fatan2(distXZ, vec->y)));
}
sph.r = sqrtf(SQ(vec->y) + distXZSq);
if ((vec->x == 0.0f) && (vec->z == 0.0f)) {
sph.yaw = 0;
} else {
sph.yaw = CAM_DEG_TO_BINANG(RAD_TO_DEG(fatan2(vec->x, vec->z)));
}
return sph;
}
/**
* Takes the point `vec`, and converts it to a geographic coordinate
*/
VecGeo world2sglobe(xyz_t* vec) {
VecSph sph = world2spolar(vec);
sph.pitch = 0x3FFF - sph.pitch;
return sph;
}
/**
* Takes the differences of positions `a` and `b`, and converts them to spherical coordinates
*/
VecSph spolar_by_2pos(xyz_t* a, xyz_t* b) {
xyz_t diff;
diff.x = b->x - a->x;
diff.y = b->y - a->y;
diff.z = b->z - a->z;
return world2spolar(&diff);
}
/**
* Takes the difference of positions `a` and `b`, and converts them to geographic coordinates
*/
VecGeo sglobe_by_2pos(xyz_t* a, xyz_t* b) {
xyz_t diff;
diff.x = b->x - a->x;
diff.y = b->y - a->y;
diff.z = b->z - a->z;
return world2sglobe(&diff);
}
/**
* Gets the pitch/yaw of the vector formed from `b`-`a`, result is in radians
*/
xyz_t radianxy_by_2pos(xyz_t* a, xyz_t* b) {
xyz_t anglesRad;
anglesRad.x = fatan2(b->z - a->z, b->y - a->y);
anglesRad.y = fatan2(b->x - a->x, b->z - a->z);
anglesRad.z = 0.0f;
return anglesRad;
}
/**
* Gets the pitch/yaw of the vector formed from `b`-`a`, result is in degrees
*/
xyz_t degreexy_by_2pos(xyz_t* a, xyz_t* b) {
xyz_t anglesRad = radianxy_by_2pos(a, b);
xyz_t anglesDegrees;
anglesDegrees.x = RAD_TO_DEG(anglesRad.x);
anglesDegrees.y = RAD_TO_DEG(anglesRad.y);
anglesDegrees.z = 0.0f;
return anglesDegrees;
}
/**
* Gets the pitch/yaw of the vector formed from `b`-`a`, result is in binary degrees
*/
s_xyz sanglexy_by_2pos(xyz_t* a, xyz_t* b) {
xyz_t anglesRad = radianxy_by_2pos(a, b);
s_xyz anglesBinAng;
anglesBinAng.x = CAM_DEG_TO_BINANG(RAD_TO_DEG(anglesRad.x));
anglesBinAng.y = CAM_DEG_TO_BINANG(RAD_TO_DEG(anglesRad.y));
anglesBinAng.z = 0.0f;
return anglesBinAng;
}
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