/*
=======================================================================================================================================
CM_TransformedPointContents
Handles offseting and rotation of the end points for moving and rotating entities.
=======================================================================================================================================
*/
int CM_TransformedPointContents(const vec3_t p, clipHandle_t model, const vec3_t origin, const vec3_t angles) {
vec3_t p_l;
// subtract origin offset
VectorSubtract(p, origin, p_l);
// rotate start and end into the models frame of reference
if (model != BOX_MODEL_HANDLE && (angles[0] != 0.f || angles[1] != 0.f || angles[2] != 0.f)) {
vec3_t temp, forward, right, up;
angles_vectors(angles, forward, right, up);
VectorCopy(p_l, temp);
p_l[0] = DotProduct(temp, forward);
p_l[1] = -DotProduct(temp, right);
p_l[2] = DotProduct(temp, up);
}
return CM_PointContents(p_l, model);
}
/**
* @brief Calculates the view point of a player model at position 'org' using
* information in the player state 'ps' of its client, and stores the
* viewpoint coordinates in 'vp'.
*/
static void calc_viewpoint(playerState_t *ps, vec3_t org, vec3_t vp)
{
VectorCopy(org, vp);
if (ps->leanf != 0)
{
vec3_t right, v3ViewAngles;
VectorCopy(ps->viewangles, v3ViewAngles);
v3ViewAngles[2] += ps->leanf / 2.0f;
angles_vectors(v3ViewAngles, NULL, right, NULL);
VectorMA(org, ps->leanf, right, org);
}
if (ps->pm_flags & PMF_DUCKED)
{
vp[2] += CROUCH_VIEWHEIGHT;
}
else
{
vp[2] += DEFAULT_VIEWHEIGHT;
}
}
qboolean isEntVisible(entityState_t *ent)
{
trace_t tr;
vec3_t start, end, temp;
vec3_t forward, up, right, right2;
float view_height;
VectorCopy(cl.cgameClientLerpOrigin, start);
start[2] += (cl.snap.ps.viewheight - 1);
if (cl.snap.ps.leanf != 0)
{
vec3_t lright, v3ViewAngles;
VectorCopy(cl.snap.ps.viewangles, v3ViewAngles);
v3ViewAngles[2] += cl.snap.ps.leanf / 2.0f;
angles_vectors(v3ViewAngles, NULL, lright, NULL);
VectorMA(start, cl.snap.ps.leanf, lright, start);
}
VectorCopy(ent->pos.trBase, end);
// Compute vector perpindicular to view to ent
VectorSubtract(end, start, forward);
vec3_norm_fast(forward);
VectorSet(up, 0, 0, 1);
vec3_cross(forward, up, right);
vec3_norm_fast(right);
VectorScale(right, 10, right2);
VectorScale(right, 18, right);
// Set viewheight
if (ent->animMovetype)
{
view_height = 16;
}
else
{
view_height = 40;
}
// First, viewpoint to viewpoint
end[2] += view_height;
CM_BoxTrace(&tr, start, end, NULL, NULL, 0, CONTENTS_SOLID, qfalse);
if (tr.fraction == 1.f)
{
return qtrue;
}
// First-b, viewpoint to top of head
end[2] += 16;
CM_BoxTrace(&tr, start, end, NULL, NULL, 0, CONTENTS_SOLID, qfalse);
if (tr.fraction == 1.f)
{
return qtrue;
}
end[2] -= 16;
// Second, viewpoint to ent's origin
end[2] -= view_height;
CM_BoxTrace(&tr, start, end, NULL, NULL, 0, CONTENTS_SOLID, qfalse);
if (tr.fraction == 1.f)
{
return qtrue;
}
// Third, to ent's right knee
VectorAdd(end, right, temp);
temp[2] += 8;
CM_BoxTrace(&tr, start, temp, NULL, NULL, 0, CONTENTS_SOLID, qfalse);
if (tr.fraction == 1.f)
{
return qtrue;
}
// Fourth, to ent's right shoulder
VectorAdd(end, right2, temp);
if (ent->animMovetype)
{
temp[2] += 28;
}
else
{
temp[2] += 52;
}
CM_BoxTrace(&tr, start, temp, NULL, NULL, 0, CONTENTS_SOLID, qfalse);
if (tr.fraction == 1.f)
{
return qtrue;
}
// Fifth, to ent's left knee
VectorScale(right, -1, right);
VectorScale(right2, -1, right2);
VectorAdd(end, right2, temp);
temp[2] += 2;
CM_BoxTrace(&tr, start, temp, NULL, NULL, 0, CONTENTS_SOLID, qfalse);
if (tr.fraction == 1.f)
{
return qtrue;
}
// Sixth, to ent's left shoulder
VectorAdd(end, right, temp);
if (ent->animMovetype)
{
temp[2] += 16;
}
else
{
temp[2] += 36;
}
CM_BoxTrace(&tr, start, temp, NULL, NULL, 0, CONTENTS_SOLID, qfalse);
if (tr.fraction == 1.f)
{
return qtrue;
}
return qfalse;
}
