+/////////////////////////////////////////
+// DP_MD3_TAGINFO extension coded by VorteX
+
+int SV_GetTagIndex (edict_t *e, char *tagname)
+{
+ int tagindex, i;
+ model_t *model;
+
+ i = e->v->modelindex;
+ if (i < 1 || i >= MAX_MODELS)
+ return -1;
+ model = sv.models[i];
+
+ tagindex = -1;
+ if (model->data_overridetagnamesforskin && (unsigned int)e->v->skin < (unsigned int)model->numskins && model->data_overridetagnamesforskin[(unsigned int)e->v->skin].num_overridetagnames)
+ {
+ for (i = 0; i < model->data_overridetagnamesforskin[(unsigned int)e->v->skin].num_overridetagnames; i++)
+ {
+ if (!strcmp(tagname, model->data_overridetagnamesforskin[(unsigned int)e->v->skin].data_overridetagnames[i].name))
+ {
+ tagindex = i;
+ break;
+ }
+ }
+ }
+ if (tagindex == -1)
+ {
+ for (i = 0;i < model->alias.aliasnum_tags; i++)
+ {
+ if (!(strcmp(tagname, model->alias.aliasdata_tags[i].name)))
+ {
+ tagindex = i;
+ break;
+ }
+ }
+ }
+ return tagindex + 1;
+};
+
+// Warnings/errors code:
+// 0 - normal (everything all-right)
+// 1 - world entity
+// 2 - free entity
+// 3 - null or non-precached model
+// 4 - no tags with requested index
+// 5 - runaway loop at attachment chain
+extern cvar_t cl_bob;
+extern cvar_t cl_bobcycle;
+extern cvar_t cl_bobup;
+int SV_GetTagMatrix (matrix4x4_t *out, edict_t *ent, int tagindex)
+{
+ eval_t *val;
+ int modelindex, reqtag, reqframe, attachloop;
+ matrix4x4_t entitymatrix, tagmatrix, attachmatrix;
+ edict_t *attachent;
+ model_t *model;
+
+ Matrix4x4_CreateIdentity(out); // warnings and errors return identical matrix
+
+ if (ent == sv.edicts)
+ return 1;
+ if (ent->e->free)
+ return 2;
+
+ modelindex = (int)ent->v->modelindex;
+ if (modelindex <= 0 || modelindex > MAX_MODELS)
+ return 3;
+
+ model = sv.models[modelindex];
+ reqtag = model->alias.aliasnum_tags;
+
+ if (tagindex <= 0 || tagindex > reqtag)
+ {
+ if (reqtag && tagindex) // Only appear if model has no tags or not-null tag requested
+ return 4;
+ return 0;
+ }
+
+ if (ent->v->frame < 0 || ent->v->frame > model->alias.aliasnum_tagframes)
+ reqframe = model->numframes - 1; // if model has wrong frame, engine automatically switches to model last frame
+ else
+ reqframe = ent->v->frame;
+
+ // get initial tag matrix
+ if (tagindex)
+ {
+ reqtag = (tagindex - 1) + ent->v->frame*model->alias.aliasnum_tags;
+ Matrix4x4_Copy(&tagmatrix, &model->alias.aliasdata_tags[reqtag].matrix);
+ }
+ else
+ Matrix4x4_CreateIdentity(&tagmatrix);
+
+ if ((val = GETEDICTFIELDVALUE(ent, eval_tag_entity)) && val->edict)
+ { // DP_GFX_QUAKE3MODELTAGS, scan all chain and stop on unattached entity
+ attachloop = 0;
+ do
+ {
+ attachent = EDICT_NUM(val->edict); // to this it entity our entity is attached
+ val = GETEDICTFIELDVALUE(ent, eval_tag_index);
+ Matrix4x4_CreateIdentity(&attachmatrix);
+ if (val->_float >= 1 && attachent->v->modelindex >= 1 && attachent->v->modelindex < MAX_MODELS)
+ {
+ model = sv.models[(int)attachent->v->modelindex];
+ if (val->_float < model->alias.aliasnum_tags)
+ {
+ // got tagname on parent entity attachment tag via tag_index (and got it's matrix)
+ model = sv.models[(int)attachent->v->modelindex];
+ reqtag = (val->_float - 1) + attachent->v->frame*model->alias.aliasnum_tags;
+ Matrix4x4_Copy(&attachmatrix, &model->alias.aliasdata_tags[reqtag].matrix);
+ }
+ }
+
+ // apply transformation by child entity matrix
+ val = GETEDICTFIELDVALUE(ent, eval_scale);
+ if (val->_float == 0)
+ val->_float = 1;
+ Matrix4x4_CreateFromQuakeEntity(&entitymatrix, ent->v->origin[0], ent->v->origin[1], ent->v->origin[2], -ent->v->angles[0], ent->v->angles[1], ent->v->angles[2], val->_float);
+ Matrix4x4_Concat(out, &entitymatrix, &tagmatrix);
+ out->m[0][3] = entitymatrix.m[0][3] + val->_float*(entitymatrix.m[0][0]*tagmatrix.m[0][3] + entitymatrix.m[0][1]*tagmatrix.m[1][3] + entitymatrix.m[0][2]*tagmatrix.m[2][3]);
+ out->m[1][3] = entitymatrix.m[1][3] + val->_float*(entitymatrix.m[1][0]*tagmatrix.m[0][3] + entitymatrix.m[1][1]*tagmatrix.m[1][3] + entitymatrix.m[1][2]*tagmatrix.m[2][3]);
+ out->m[2][3] = entitymatrix.m[2][3] + val->_float*(entitymatrix.m[2][0]*tagmatrix.m[0][3] + entitymatrix.m[2][1]*tagmatrix.m[1][3] + entitymatrix.m[2][2]*tagmatrix.m[2][3]);
+ Matrix4x4_Copy(&tagmatrix, out);
+
+ // finally transformate by matrix of tag on parent entity
+ Matrix4x4_Concat(out, &attachmatrix, &tagmatrix);
+ out->m[0][3] = attachmatrix.m[0][3] + attachmatrix.m[0][0]*tagmatrix.m[0][3] + attachmatrix.m[0][1]*tagmatrix.m[1][3] + attachmatrix.m[0][2]*tagmatrix.m[2][3];
+ out->m[1][3] = attachmatrix.m[1][3] + attachmatrix.m[1][0]*tagmatrix.m[0][3] + attachmatrix.m[1][1]*tagmatrix.m[1][3] + attachmatrix.m[1][2]*tagmatrix.m[2][3];
+ out->m[2][3] = attachmatrix.m[2][3] + attachmatrix.m[2][0]*tagmatrix.m[0][3] + attachmatrix.m[2][1]*tagmatrix.m[1][3] + attachmatrix.m[2][2]*tagmatrix.m[2][3];
+ Matrix4x4_Copy(&tagmatrix, out);
+
+ ent = attachent;
+ attachloop += 1;
+ if (attachloop > 255) // prevent runaway looping
+ return 5;
+ }
+ while ((val = GETEDICTFIELDVALUE(ent, eval_tag_entity)) && val->edict);
+ }
+
+ // normal or RENDER_VIEWMODEL entity (or main parent entity on attach chain)
+ val = GETEDICTFIELDVALUE(ent, eval_scale);
+ if (val->_float == 0)
+ val->_float = 1;
+ // Alias models have inverse pitch, bmodels can't have tags, so don't check for modeltype...
+ Matrix4x4_CreateFromQuakeEntity(&entitymatrix, ent->v->origin[0], ent->v->origin[1], ent->v->origin[2], -ent->v->angles[0], ent->v->angles[1], ent->v->angles[2], val->_float);
+ Matrix4x4_Concat(out, &entitymatrix, &tagmatrix);
+ out->m[0][3] = entitymatrix.m[0][3] + val->_float*(entitymatrix.m[0][0]*tagmatrix.m[0][3] + entitymatrix.m[0][1]*tagmatrix.m[1][3] + entitymatrix.m[0][2]*tagmatrix.m[2][3]);
+ out->m[1][3] = entitymatrix.m[1][3] + val->_float*(entitymatrix.m[1][0]*tagmatrix.m[0][3] + entitymatrix.m[1][1]*tagmatrix.m[1][3] + entitymatrix.m[1][2]*tagmatrix.m[2][3]);
+ out->m[2][3] = entitymatrix.m[2][3] + val->_float*(entitymatrix.m[2][0]*tagmatrix.m[0][3] + entitymatrix.m[2][1]*tagmatrix.m[1][3] + entitymatrix.m[2][2]*tagmatrix.m[2][3]);
+
+ if ((val = GETEDICTFIELDVALUE(ent, eval_viewmodelforclient)) && val->edict)
+ {// RENDER_VIEWMODEL magic
+ Matrix4x4_Copy(&tagmatrix, out);
+ ent = EDICT_NUM(val->edict);
+
+ val = GETEDICTFIELDVALUE(ent, eval_scale);
+ if (val->_float == 0)
+ val->_float = 1;
+
+ Matrix4x4_CreateFromQuakeEntity(&entitymatrix, ent->v->origin[0], ent->v->origin[1], ent->v->origin[2] + ent->v->view_ofs[2], ent->v->v_angle[0], ent->v->v_angle[1], ent->v->v_angle[2], val->_float);
+ Matrix4x4_Concat(out, &entitymatrix, &tagmatrix);
+ out->m[0][3] = entitymatrix.m[0][3] + val->_float*(entitymatrix.m[0][0]*tagmatrix.m[0][3] + entitymatrix.m[0][1]*tagmatrix.m[1][3] + entitymatrix.m[0][2]*tagmatrix.m[2][3]);
+ out->m[1][3] = entitymatrix.m[1][3] + val->_float*(entitymatrix.m[1][0]*tagmatrix.m[0][3] + entitymatrix.m[1][1]*tagmatrix.m[1][3] + entitymatrix.m[1][2]*tagmatrix.m[2][3]);
+ out->m[2][3] = entitymatrix.m[2][3] + val->_float*(entitymatrix.m[2][0]*tagmatrix.m[0][3] + entitymatrix.m[2][1]*tagmatrix.m[1][3] + entitymatrix.m[2][2]*tagmatrix.m[2][3]);
+
+ /*
+ // Cl_bob, ported from rendering code
+ if (ent->v->health > 0 && cl_bob.value && cl_bobcycle.value)
+ {
+ double bob, cycle;
+ // LordHavoc: this code is *weird*, but not replacable (I think it
+ // should be done in QC on the server, but oh well, quake is quake)
+ // LordHavoc: figured out bobup: the time at which the sin is at 180
+ // degrees (which allows lengthening or squishing the peak or valley)
+ cycle = sv.time/cl_bobcycle.value;
+ cycle -= (int)cycle;
+ if (cycle < cl_bobup.value)
+ cycle = sin(M_PI * cycle / cl_bobup.value);
+ else
+ cycle = sin(M_PI + M_PI * (cycle-cl_bobup.value)/(1.0 - cl_bobup.value));
+ // bob is proportional to velocity in the xy plane
+ // (don't count Z, or jumping messes it up)
+ bob = sqrt(ent->v->velocity[0]*ent->v->velocity[0] + ent->v->velocity[1]*ent->v->velocity[1])*cl_bob.value;
+ bob = bob*0.3 + bob*0.7*cycle;
+ out->m[2][3] += bound(-7, bob, 4);
+ }
+ */
+ }
+ return 0;
+}
+
+//float(entity ent, string tagname) gettagindex;
+
+void PF_gettagindex (void)
+{
+ edict_t *ent = G_EDICT(OFS_PARM0);
+ char *tag_name = G_STRING(OFS_PARM1);
+ int modelindex, tag_index;
+
+ if (ent == sv.edicts)
+ PF_WARNING("gettagindex: can't affect world entity\n");
+ if (ent->e->free)
+ PF_WARNING("gettagindex: can't affect free entity\n");
+
+ modelindex = (int)ent->v->modelindex;
+ tag_index = 0;
+ if (modelindex <= 0 || modelindex > MAX_MODELS)
+ Con_DPrintf("gettagindex(entity #%i): null or non-precached model\n", NUM_FOR_EDICT(ent));
+ else
+ {
+ tag_index = SV_GetTagIndex(ent, tag_name);
+ if (tag_index == 0)
+ Con_DPrintf("gettagindex(entity #%i): tag \"%s\" not found\n", NUM_FOR_EDICT(ent), tag_name);
+ }
+ G_FLOAT(OFS_RETURN) = tag_index;
+};
+
+//vector(entity ent, float tagindex) gettaginfo;
+void PF_gettaginfo (void)
+{
+ edict_t *e = G_EDICT(OFS_PARM0);
+ int tagindex = (int)G_FLOAT(OFS_PARM1);
+ matrix4x4_t tag_matrix;
+ int returncode;
+
+ returncode = SV_GetTagMatrix(&tag_matrix, e, tagindex);
+ Matrix4x4_ToVectors(&tag_matrix, pr_global_struct->v_forward, pr_global_struct->v_right, pr_global_struct->v_up, G_VECTOR(OFS_RETURN));
+
+ switch(returncode)
+ {
+ case 1:
+ PF_WARNING("gettagindex: can't affect world entity\n");
+ break;
+ case 2:
+ PF_WARNING("gettagindex: can't affect free entity\n");
+ break;
+ case 3:
+ Con_DPrintf("SV_GetTagMatrix(entity #%i): null or non-precached model\n", NUM_FOR_EDICT(e));
+ break;
+ case 4:
+ Con_DPrintf("SV_GetTagMatrix(entity #%i): model has no tag with requested index %i\n", NUM_FOR_EDICT(e), tagindex);
+ break;
+ case 5:
+ Con_DPrintf("SV_GetTagMatrix(entity #%i): runaway loop at attachment chain\n", NUM_FOR_EDICT(e));
+ break;
+ }
+}
+