//*****************************************************************************
void rvec_2_R(const float rvec[3], // rotation vector [rad]
float R[3][3]) // rotation matrix
{
float q[4];
float angle = vector_magnitude(rvec);
if (angle <= 0.00048828125f)
{
// angle < sqrt(2*machine_epsilon(float)), so flush cos(x) to 1.0f
q[0] = 1.0f;
// and flush sin(x/2)/x to 0.5
q[1] = 0.5f*rvec[0];
q[2] = 0.5f*rvec[1];
q[3] = 0.5f*rvec[2];
// This prevents division by zero, while retaining full accuracy
}
else
{
q[0] = cosf(angle*0.5f);
float scale = sinf(angle*0.5f) / angle;
q[1] = scale*rvec[0];
q[2] = scale*rvec[1];
q[3] = scale*rvec[2];
}
quaternion_2_R(q, R);
}
t_bool intersect_cone(t_ray ray, t_cone *obj, float *t)
{
float a;
float b;
float c;
float tmp;
t_vector3 ec;
ec = vector_substract(ray.pos, obj->pos);
tmp = (1 + obj->radius * obj->radius);
a = vector_dotproduct(ray.dir, ray.dir);
a = a - (tmp * SQUARE(vector_dotproduct(ray.dir, obj->dir)));
b = vector_dotproduct(ray.dir, obj->dir) * vector_dotproduct(ec, obj->dir);
b = 2 * (vector_dotproduct(ray.dir, ec) - b * tmp);
c = vector_dotproduct(ec, ec);
c -= tmp * SQUARE(vector_dotproduct(ec, obj->dir));
if ((*t = compute_len(a, b, c)) > 0.)
{
ec = vector_substract(create_intersect(ray, *t), obj->pos);
if (obj->height == 0 || obj->dir.x > 0)
return (TRUE);
else if (obj->height > 0. && vector_dotproduct(obj->dir, ec) > 0.)
if ((obj->height / cos(atan(obj->radius)) > vector_magnitude(ec)))
return (TRUE);
}
return (FALSE);
}
void vector_normalize(float v[3])
{
float length = vector_magnitude(v);
v[0] /= length;
v[1] /= length;
v[2] /= length;
}
static int collision_native__make_polygon(lua_State *L)
{
int vertex_count = lua_objlen(L, 1) / 2;
polygon_s *poly = (polygon_s *)lua_newuserdata(
L, sizeof(polygon_s) + (vertex_count - 1) * sizeof(vector_s));
luaL_getmetatable(L, POLY_MT);
lua_setmetatable(L, -2);
poly->vertex_count = vertex_count;
poly->bounding_radius = 0;
int i;
for(i = 0; i < vertex_count; i++)
{
lua_rawgeti(L, 1, i*2+1);
poly->vertices[i].x = lua_tonumber(L, -1);
lua_rawgeti(L, 1, i*2+2);
poly->vertices[i].y = lua_tonumber(L, -1);
lua_pop(L, 2);
lua_Number mag = vector_magnitude(poly->vertices[i]);
if(poly->bounding_radius < mag)
poly->bounding_radius = mag;
}
return 1;
}
static void movement_calc(void *o)
{
struct missile *m = o;
float target_dist = FLT_MAX;
if (m->target != NULL) {
target_dist = vector_magnitude(m->pos, m->target->pos);
target_dist -= m->hb[0].rad;
target_dist -= m->target->hb[0].rad;
}
if ( (m->life_time != 0 &&
get_tick_count() - m->init_time > m->life_time) ||
(m->frag && target_dist < 0.05*world_scale)
) {
if (m->frag) {
missile_frag(m);
}
if (m->target != NULL) {
remove_reset_ptr((void*)m->target, &m->target);
}
m->is_alive = false;
explode(m);
return;
}
if (m->target == NULL) {
remove_reset_ptr((void*)m->target, &m->target);
if (!m->dumb) {
m->target = acquire_target(m->firer);
if (m->target != NULL) {
puts("required target");
}
}
return;
}
if ( !m->target->is_alive ||
!timed_out_r(&m->last_ctrl_tick, CTRL_RATE)) {
return;
}
float dx = -m->target->pos.x + m->pos.x;
float dy = +m->target->pos.y - m->pos.y;
float old_rot = m->rotation;
m->rotation = rad_to_degd(atan2(dx, dy));
const float MAX_ROT = 10;
if (old_rot > m->rotation) {
if (old_rot - m->rotation > MAX_ROT ||
fmod(360 + old_rot - m->rotation, 360) > MAX_ROT) {
m->rotation = old_rot - MAX_ROT;
}
} else {
if (m->rotation - old_rot > MAX_ROT ||
fmod(360 + m->rotation - old_rot, 360) > MAX_ROT) {
m->rotation = old_rot + MAX_ROT;
}
}
float mag = xy_magnitude(m->vel.x, m->vel.y);
m->vel.x = vector_x(mag, 180 + m->rotation);
m->vel.y = vector_y(mag, m->rotation);
m->accel = 0;
}
void vector_normalize(vector* v)
{
float magnitude = vector_magnitude(v), z = 0;
if(magnitude > 0)
{
z = powf(magnitude, 0.5f);
vector_div_scalar(v, z);
}
}
void vector_normalize(vector* v)
{
float magnitude = vector_magnitude(v);
if(magnitude > 0)
{
v->x /= magnitude;
v->y /= magnitude;
v->z /= magnitude;
}
}
vector_t calculate_gravitation(object_t* a,object_t* b)
{
//Get distance and direction
vector_t displacement=vector_subtract(a->position,b->position);
double distance=vector_magnitude(displacement);
vector_t direction=vector_multiply(1/distance,displacement);
//Calculate gravity
double gravity=GRAVITATIONAL_CONSTANT*(a->mass*b->mass)/(distance*distance);
return vector_multiply(gravity,direction);
}
void GameScene::update(float dt)
{
for (Entity* d : decorations_)
{
d->update(dt);
}
for (Entity* p : platforms_)
{
p->update(dt);
}
for (Entity* g : goalflags_)
{
g->update(dt);
}
update_effects(dt);
for (Entity* c : collectibles_)
{
c->update(dt);
sf::FloatRect bbox(c->collision_area());
if (!c->animation().hidden() &&
bbox.Intersects(player_.collision_area()))
{
explode(c,true);
collectsnd_.Play();
}
}
update_player(dt);
bool out_of_bounds = true;
for (Entity* p : platforms_)
{
if (vector_magnitude(
p->position() - player_.position())
< 1000)
{
out_of_bounds = false;
}
}
if (out_of_bounds)
{
init_world();
}
update_camera(dt);
}
vector3d ahrs_drift_correction(dataexchange_t *data) {
vector3d corr_vector, acc_g;
corr_vector.x = 0.0;
corr_vector.y = 0.0;
corr_vector.z = 0.0;
//do correction only then acceleration is close to 1G (unreliable if greater)
acc_g = adxl345_raw_to_g(data, SCALE_2G_10B);
double acc_magnitude = vector_magnitude(acc_g);
if (fabs(acc_magnitude - 1.0) <= 0.15) {
float corr_strength = 0.15;
//vectors for rotation matrix
vector3d acc_v, mag_v;
acc_v.x = (*data).acc_x;
acc_v.y = (*data).acc_y;
acc_v.z = (*data).acc_z;
mag_v.x = (*data).mag_x;
mag_v.y = (*data).mag_y;
mag_v.z = (*data).mag_z;
hmc5883l_applyCalibration(&mag_v, calib_ptr);
vector3d down = vector_inv(acc_v);
vector3d east = vector_cross(down, mag_v);
vector3d north = vector_cross(east, down);
//normalize vectors
vector_norm(&down);
vector_norm(&east);
vector_norm(&north);
//matrix from rotation quaternion
matrix3x3d rot_matrix = quaternion_to_matrix((*data).qr);
//correction vector calculation
vector3d sum1 = vector_sum(vector_cross(north, matrix_row_to_vector(&rot_matrix, 1)),
vector_cross(east, matrix_row_to_vector(&rot_matrix, 2)));
vector3d sum2 = vector_sum(sum1, vector_cross(down, matrix_row_to_vector(&rot_matrix, 3)));
corr_vector = vector_scale(sum2, corr_strength);
}
return corr_vector;
}
fp_t cosine_of_angle_diff(const vector_3_t v1, const vector_3_t v2)
{
int64_t dotproduct;
int64_t denominator;
/*
* Angle between two vectors is acos(A dot B / |A|*|B|). To return
* cosine of angle between vectors, then don't do acos operation.
*/
dotproduct = (int64_t)v1[0] * v2[0] +
(int64_t)v1[1] * v2[1] +
(int64_t)v1[2] * v2[2];
denominator = (int64_t)vector_magnitude(v1) * vector_magnitude(v2);
/* Check for divide by 0 although extremely unlikely. */
if (!denominator)
return 0;
/*
* We must shift the dot product first, so that we can represent
* fractions. The answer is always a number with magnitude < 1.0, so
* if we don't shift, it will always round down to 0.
*
* Note that overflow is possible if the dot product is large (that is,
* if the vector components are of size (31 - FP_BITS/2) bits. If that
* ever becomes a problem, we could detect this by counting the leading
* zeroes of the dot product and shifting the denominator down
* partially instead of shifting the dot product up. With the current
* FP_BITS=16, that happens if the vector components are ~2^23. Which
* we're a long way away from; the vector components used in
* accelerometer calculations are ~2^11.
*/
return (dotproduct << FP_BITS) / denominator;
}
void spacecraft_collision(simulation_t* sim,spacecraft_t* spacecraft)
{
vector_t displacement=vector_subtract(spacecraft->base.position,spacecraft->orbit.primary->base.position);
double distance=vector_magnitude(displacement);
double penetration=spacecraft->orbit.primary->radius-distance;
if(penetration>0)
{
displacement=vector_multiply((distance+penetration)/distance,displacement);
spacecraft->base.position=vector_add(spacecraft->orbit.primary->base.position,displacement);
spacecraft->base.velocity=spacecraft->orbit.primary->base.velocity;
spacecraft->base.velocity.x+=spacecraft->orbit.primary->base.delta_rot*displacement.y;
spacecraft->base.velocity.y+=-spacecraft->orbit.primary->base.delta_rot*displacement.x;
spacecraft->base.rotation=atan2(-displacement.y,displacement.x)+M_PI/2;
spacecraft->base.delta_rot=0;
}
}
static t_color3 getfinalcolor(t_object *arr, t_intersect inter, t_env env)
{
t_color3 color;
t_color3 color_tmp;
float dist[2];
t_ray newray;
float shade;
t_vector3 l;
int i;
int k;
int a;
color_tmp = color_new(0, 0, 0);
a = 0;
if (inter.obj)
{
i = -1;
while(arr[i].type != DEFAULT)
{
shade = 1.0;
if (arr[i].light == TRUE)
{
l = vector_substract(arr[i].pos, inter.pos);
dist[0] = vector_magnitude(l);
newray.pos = vector_substract(inter.pos, vector_mul(inter.v_normal, 1e-4f));
newray.dir = vector_unit(l);
k = -1;
while (++k < 16 && arr[k].type != DEFAULT)
if (env.fctinter[arr[k].type](newray, arr + k, &dist[1]))
{
if (arr[k].light != TRUE && dist[1] <= dist[0])
shade -= 0.3;
}
color_tmp = vector_sum(color_tmp, iter_light(inter, &arr[i], shade));
++a;
}
++i;
}
return (vector_div(color_tmp, a));
}
return (color_new(17, 25, 37));
}
void spacecraft_calculate_orbit(simulation_t* sim,spacecraft_t* spacecraft)
{
//Determine smallest s.o.i that the spacecraft lies within
celestial_body_t* primary=sim->primary;
double smallest_soi=vector_magnitude(vector_subtract(sim->primary->base.position,spacecraft->base.position));
int i;
for(i=0;i<sim->num_celestial_bodies;i++)
{
celestial_body_t* body=&sim->celestial_bodies[i];
if(body->orbit.primary!=NULL&&body->sphere_of_influence<smallest_soi&&body->sphere_of_influence>vector_magnitude(vector_subtract(body->base.position,spacecraft->base.position)))
{
primary=body;
smallest_soi=body->sphere_of_influence;
}
}
//Calculate spacecraft orbit
spacecraft->orbit=orbit_calculate(primary,vector_subtract(spacecraft->base.position,primary->base.position),vector_subtract(spacecraft->base.velocity,primary->base.velocity));
}
void animate_particles(particle *particles, int particle_count, float time_delta){
int i;
vector target = vector_make(0,-40,500);
time_delta *= 500;
for(i=0;i<particle_count;i++){
vector to = vector_sub(target,particles[i].pos);
float len = vector_magnitude(to);
if(len>1.f){
vector dir = vector_normalize(to);
particles[i].pos = vector_add(particles[i].pos, vector_scale(dir,time_delta*(1.f/(len*0.1f) ) ));
if(particles[i].pos.z>500){
particles[i].pos = target;
len = 0;
}
particles[i].alpha = (len-1)*0.005f;
}else{
particles[i].size = 0;
particles[i].alpha = 0;
}
}
}
quaternion ahrs_orientation_from_gyro(dataexchange_t *data) {
//angle component
vector3d gyr_rad_s = l3g4200d_raw_to_rad(data);
double angle = vector_magnitude(gyr_rad_s) * (*data).time_period;
//axis, normalized
vector_norm(&gyr_rad_s);
//quaternion from axis/angle
quaternion q = quaternion_from_axis_angle(gyr_rad_s, angle);
//normalize
quaternion_norm(&q);
(*data).qr = quaternion_product((*data).qr, q);
return q;
}
//*****************************************************************************
uint8_t R_from_two_vectors(const float v1b[3], // v1 in b, will be nornalized
const float v1e[3], // v1 in e, will be normalized
const float v2b[3], // v2 in b, will be normalized
const float v2e[3], // v2 in e, will be normlized
float Rbe[3][3]) // rotation matrix
{
float Rib[3][3], Rie[3][3];
float mag;
uint8_t i,j,k;
// identity rotation in case of error
for (i=0;i<3;i++)
{
for (j=0;j<3;j++)
Rbe[i][j]=0;
Rbe[i][i]=1;
}
// The first rows of rot matrices chosen in direction of v1
mag = vector_magnitude(v1b);
if (fabsf(mag) < 1e-30)
return (0);
for (i=0;i<3;i++)
Rib[0][i]=v1b[i]/mag;
mag = vector_magnitude(v1e);
if (fabs(mag) < 1e-30)
return (0);
for (i=0;i<3;i++)
Rie[0][i]=v1e[i]/mag;
// The second rows of rot matrices chosen in direction of v1xv2
cross_product(v1b,v2b,&Rib[1][0]);
mag = vector_magnitude(&Rib[1][0]);
if (fabsf(mag) < 1e-30)
return (0);
for (i=0;i<3;i++)
Rib[1][i]=Rib[1][i]/mag;
cross_product(v1e,v2e,&Rie[1][0]);
mag = vector_magnitude(&Rie[1][0]);
if (fabsf(mag) < 1e-30)
return (0);
for (i=0;i<3;i++)
Rie[1][i]=Rie[1][i]/mag;
// The third rows of rot matrices are XxY (Row1xRow2)
cross_product(&Rib[0][0],&Rib[1][0],&Rib[2][0]);
cross_product(&Rie[0][0],&Rie[1][0],&Rie[2][0]);
// Rbe = Rbi*Rie = Rib'*Rie
for (i=0;i<3;i++)
for(j=0;j<3;j++)
{
Rbe[i][j]=0;
for(k=0;k<3;k++)
Rbe[i][j] += Rib[k][i]*Rie[k][j];
}
return 1;
}
void test_vector()
{
Vector *v = vector_new(1,2,3);
CU_ASSERT(v->x == 1);
CU_ASSERT(v->y == 2);
CU_ASSERT(v->z == 3);
Vector *vc = vector_copy(v);
CU_ASSERT(vc->x == 1);
CU_ASSERT(vc->y == 2);
CU_ASSERT(vc->z == 3);
Vector *u = vector_new(4,5,6);
vector_add(v,u);
CU_ASSERT(v->x == 5);
CU_ASSERT(v->y == 7);
CU_ASSERT(v->z == 9);
vector_subtract(v,u);
CU_ASSERT(v->x == 1);
CU_ASSERT(v->y == 2);
CU_ASSERT(v->z == 3);
vector_multiply(v,2);
CU_ASSERT(v->x == 2);
CU_ASSERT(v->y == 4);
CU_ASSERT(v->z == 6);
Vector *w = vector_cross(v,u);
CU_ASSERT(w->x == -6);
CU_ASSERT(w->y == 12);
CU_ASSERT(w->z == -6);
vector_free(v);
vector_free(u);
vector_free(w);
v = vector_new(3,4,0);
u = vector_new(0,3,4);
CU_ASSERT(v->x==u->y);
CU_ASSERT(v->y==u->z);
w = vector_cross(v,u);
CU_ASSERT(w->x == 16);
CU_ASSERT(w->y == -12);
CU_ASSERT(w->z == 9);
CU_ASSERT(within_tol(vector_magnitude(v),5));
CU_ASSERT(within_tol(vector_magnitude(u),5));
vector_free(v);
vector_free(u);
vector_free(w);
v = vector_new(1,0,0);
u = vector_new(0,0,1);
double a = vector_angle(v,u)/D2R;
CU_ASSERT(within_tol(a,90));
CU_ASSERT(within_tol(vector_angle(u,v),90.*D2R));
w = vector_cross(v,u);
CU_ASSERT(within_tol(vector_magnitude(w),1));
CU_ASSERT(w->x==0);
CU_ASSERT(w->y==-1);
CU_ASSERT(w->z==0);
}
int main(void) {
ALmatrix *m1 = _alMatrixAlloc(3, 3);
ALmatrix *m2 = _alMatrixAlloc(3, 3);
ALmatrix *m3 = _alMatrixAlloc(3, 3);
ALfloat axis[3] = { 0.0, 0.0, 1.0 };
ALfloat point[3] = { 15.0, 0.0, 0.0 };
ALfloat point1[3] = { 15.0, 0.0, 0.0 };
ALfloat point2[3] = { 15.0, 0.0, 0.0 };
ALfloat origin[3] = { 0.0, 0.0, 0.0 };
ALfloat vab;
ALfloat xaxis[3] = { 1.0, 0.0, 0.0 };
ALfloat yaxis[3] = { 0.0, 1.0, 0.0 };
ALfloat zaxis[3] = { 0.0, 0.0, 1.0 };
ALfloat mxaxis[3] = { -1.0, 0.0, 0.0 };
ALfloat myaxis[3] = { 0.0, -1.0, 0.0 };
ALfloat mzaxis[3] = { 0.0, 0.0, -1.0 };
int i;
int j;
ALfloat vec1[3], vec2[3], d[3];
for(i = 0; i < 3; i++) {
for(j = 0; j < 3; j++) {
m3->data[i][j] = 0.0;
if(i == j) {
m1->data[i][j] = 3.0;
m2->data[i][j] = 1.0;
} else {
m1->data[i][j] = 2.0;
m2->data[i][j] = 0.0;
}
}
}
#if 0
fprintf(stderr, "m1:\n[%f][%f][%f]\n[%f][%f][%f]\n[%f][%f][%f]\n\n",
m1->data[0][0], m1->data[0][1], m1->data[0][2],
m1->data[1][0], m1->data[1][1], m1->data[1][2],
m1->data[2][0], m1->data[2][1], m1->data[2][2]);
fprintf(stderr, "m2:\n[%f][%f][%f]\n[%f][%f][%f]\n[%f][%f][%f]\n\n",
m2->data[0][0], m2->data[0][1], m2->data[0][2],
m2->data[1][0], m2->data[1][1], m2->data[1][2],
m2->data[2][0], m2->data[2][1], m2->data[2][2]);
_alMatrixMul(m3, m2, m1);
fprintf(stderr, "[%f][%f][%f]\n[%f][%f][%f]\n[%f][%f][%f]\n",
m3->data[0][0], m3->data[0][1], m3->data[0][2],
m3->data[1][0], m3->data[1][1], m3->data[1][2],
m3->data[2][0], m3->data[2][1], m3->data[2][2]);
rotate_point_about_axis(1.00, point, axis);
fprintf(stderr, "point [%f][%f][%f]\n",
point[0], point[1], point[2]);
vab = vector_angle_between(origin, origin, origin);
fprintf(stderr, "origin should be 0.0, is %f\n", vab);
vab = vector_angle_between(origin, xaxis, yaxis);
fprintf(stderr, "xaxis/yaxis: should be %f, is %f\n", M_PI_2, vab);
vab = vector_angle_between(origin, xaxis, zaxis);
fprintf(stderr, "xaxis/zaxis: should be %f, is %f\n", M_PI_2, vab);
vab = vector_angle_between(origin, origin, point);
fprintf(stderr, "origin/point: should be %f, is %f\n", 0.0, vab);
vab = vector_angle_between(origin, point1, point2);
fprintf(stderr, "point1/point2: should be %f, is %f\n", 0.0, vab);
for(i = 0; i < 32; i++) {
if(ISPOWEROFTWO(i) == AL_TRUE) {
fprintf(stderr, "ISPOWEROFTWO %d = AL_TRUE\n", i);
}
}
for(i = 0; i < 32; i++) {
fprintf(stderr,
"nextPowerOfTwo(%d) = %d\n",
i, nextPowerOfTwo(i));
}
/* vector distance */
vec1[0] = -20.0;
vec1[1] = 0.0;
vec1[2] = 0.0;
vec2[0] = -22.0;
vec2[1] = 0.0;
vec2[2] = 0.0;
vector_distance(vec1, vec2, d);
fprintf(stderr, "\n\t %f %f %f \n\t+ (%f %f %f)\n\t= (%f %f %f)\n",
vec1[0], vec1[1], vec1[2],
vec2[0], vec2[1], vec2[2],
d[0], d[1], d[2]);
/* vector magnitude */
vec1[0] = -31.0;
vec1[1] = 0.0;
vec1[2] = 0.0;
vec2[0] = 30.0;
vec2[1] = 0.0;
vec2[2] = 0.0;
fprintf(stderr, "\n\t %f %f %f \n\t~~ (%f %f %f)\n\t= %f\n",
vec1[0], vec1[1], vec1[2],
vec2[0], vec2[1], vec2[2],
vector_magnitude(vec1, vec2));
/* vector magnitude again */
vec1[0] = 5.0;
vec1[1] = 0.0;
vec1[2] = 0.0;
vec2[0] = 0.0;
vec2[1] = 5.0;
vec2[2] = 0.0;
fprintf(stderr, "\n\t %f %f %f \n\t~~ (%f %f %f)\n\t= %f\n",
vec1[0], vec1[1], vec1[2],
vec2[0], vec2[1], vec2[2],
vector_magnitude(vec1, vec2));
/* vector intersect angle */
vec1[0] = 0.0; point1[0] = 4.0;
vec1[1] = 0.0; point1[1] = 0.0;
vec1[2] = 0.0; point1[2] = 0.0;
vec2[0] = 0.0; point2[0] = 0.0;
vec2[1] = 0.0; point2[1] = 4.0;
vec2[2] = 0.0; point2[2] = 0.0;
fprintf(stderr, "\n\t ---- VECTOR ANGLE INTERSECT PERPENDICULAR -----\n"
"\t1: (%f %f %f) -> (%f %f %f)\n"
"\t2: (%f %f %f) -> (%f %f %f)\n"
"\t=== %f\n",
vec1[0], vec1[1], vec1[2],
point1[0], point1[1], point1[2],
vec2[0], vec2[1], vec2[2],
point2[0], point2[1], point2[2],
vector_intersect_angle(vec1, point1, vec2, point2));
/* vector intersect angle */
vec1[0] = 0.0; point1[0] = 4.0;
vec1[1] = 0.0; point1[1] = 0.0;
vec1[2] = 0.0; point1[2] = 0.0;
vec2[0] = 2.0; point2[0] = 6.0;
vec2[1] = 0.0; point2[1] = 0.0;
vec2[2] = 0.0; point2[2] = 0.0;
fprintf(stderr, "\n\t ---- VECTOR ANGLE INTERSECT PARALLEL -----\n"
"\t1: (%f %f %f) -> (%f %f %f)\n"
"\t2: (%f %f %f) -> (%f %f %f)\n"
"\t=== %f\n",
vec1[0], vec1[1], vec1[2],
point1[0], point1[1], point1[2],
vec2[0], vec2[1], vec2[2],
point2[0], point2[1], point2[2],
vector_intersect_angle(vec1, point1, vec2, point2));
/* vector intersect angle */
vec1[0] = -2.0; point1[0] = 4.0;
vec1[1] = 0.0; point1[1] = 0.0;
vec1[2] = 0.0; point1[2] = 0.0;
vec2[0] = 0.0; point2[0] = -4.0;
vec2[1] = 0.0; point2[1] = 0.0;
vec2[2] = 0.0; point2[2] = 10.0;
fprintf(stderr, "\n\t ---- VECTOR ANGLE INTERSECT OBTUSE -----\n"
"\t1: (%f %f %f) -> (%f %f %f)\n"
"\t2: (%f %f %f) -> (%f %f %f)\n"
"\t=== %f\n",
vec1[0], vec1[1], vec1[2],
point1[0], point1[1], point1[2],
vec2[0], vec2[1], vec2[2],
point2[0], point2[1], point2[2],
vector_intersect_angle(vec1, point1, vec2, point2));
/* vector intersect angle */
vec1[0] = 0.0; point1[0] = 0.0;
vec1[1] = 4.0; point1[1] = 0.0;
vec1[2] = 0.0; point1[2] = 0.0;
vec2[0] = 0.0; point2[0] = 0.0;
vec2[1] = 0.0; point2[1] = 0.0;
vec2[2] = 4.0; point2[2] = 0.0;
fprintf(stderr, "\n\t ---- VECTOR ANGLE INTERSECT INTERSECTING -----\n"
"\t1: (%f %f %f) -> (%f %f %f)\n"
"\t2: (%f %f %f) -> (%f %f %f)\n"
"\t=== %f\n",
vec1[0], vec1[1], vec1[2],
point1[0], point1[1], point1[2],
vec2[0], vec2[1], vec2[2],
point2[0], point2[1], point2[2],
vector_intersect_angle(vec1, point1, vec2, point2));
#endif
return 0;
}
vector_t vector_normalize(vector_t v)
{
return vector_scale(v, 1.0 / vector_magnitude(v));
}
float vector_distance(vector_t a, vector_t b)
{
return vector_magnitude(vector_sub(a, b));
}
