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-rw-r--r--src/cgame/cg_attachment.c404
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diff --git a/src/cgame/cg_attachment.c b/src/cgame/cg_attachment.c
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+++ b/src/cgame/cg_attachment.c
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+/*
+===========================================================================
+Copyright (C) 2000-2006 Tim Angus
+
+This file is part of Tremulous.
+
+Tremulous is free software; you can redistribute it
+and/or modify it under the terms of the GNU General Public License as
+published by the Free Software Foundation; either version 2 of the License,
+or (at your option) any later version.
+
+Tremulous is distributed in the hope that it will be
+useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with Tremulous; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+===========================================================================
+*/
+
+// cg_attachment.c -- an abstract attachment system
+
+#include "cg_local.h"
+
+/*
+===============
+CG_AttachmentPoint
+
+Return the attachment point
+===============
+*/
+qboolean CG_AttachmentPoint( attachment_t *a, vec3_t v )
+{
+ centity_t *cent;
+
+ if( !a )
+ return qfalse;
+
+ // if it all breaks, then use the last point we know was correct
+ VectorCopy( a->lastValidAttachmentPoint, v );
+
+ switch( a->type )
+ {
+ case AT_STATIC:
+ if( !a->staticValid )
+ return qfalse;
+
+ VectorCopy( a->origin, v );
+ break;
+
+ case AT_TAG:
+ if( !a->tagValid )
+ return qfalse;
+
+ AxisCopy( axisDefault, a->re.axis );
+ CG_PositionRotatedEntityOnTag( &a->re, &a->parent,
+ a->model, a->tagName );
+ VectorCopy( a->re.origin, v );
+ break;
+
+ case AT_CENT:
+ if( !a->centValid )
+ return qfalse;
+
+ if( a->centNum == cg.predictedPlayerState.clientNum )
+ {
+ // this is smoother if it's the local client
+ VectorCopy( cg.predictedPlayerState.origin, v );
+ }
+ else
+ {
+ cent = &cg_entities[ a->centNum ];
+ VectorCopy( cent->lerpOrigin, v );
+ }
+ break;
+
+ case AT_PARTICLE:
+ if( !a->particleValid )
+ return qfalse;
+
+ if( !a->particle->valid )
+ {
+ a->particleValid = qfalse;
+ return qfalse;
+ }
+ else
+ VectorCopy( a->particle->origin, v );
+ break;
+
+ default:
+ CG_Printf( S_COLOR_RED "ERROR: Invalid attachmentType_t in attachment\n" );
+ break;
+ }
+
+ if( a->hasOffset )
+ VectorAdd( v, a->offset, v );
+
+ VectorCopy( v, a->lastValidAttachmentPoint );
+
+ return qtrue;
+}
+
+/*
+===============
+CG_AttachmentDir
+
+Return the attachment direction
+===============
+*/
+qboolean CG_AttachmentDir( attachment_t *a, vec3_t v )
+{
+ vec3_t forward;
+ centity_t *cent;
+
+ if( !a )
+ return qfalse;
+
+ switch( a->type )
+ {
+ case AT_STATIC:
+ return qfalse;
+ break;
+
+ case AT_TAG:
+ if( !a->tagValid )
+ return qfalse;
+
+ VectorCopy( a->re.axis[ 0 ], v );
+ break;
+
+ case AT_CENT:
+ if( !a->centValid )
+ return qfalse;
+
+ cent = &cg_entities[ a->centNum ];
+ AngleVectors( cent->lerpAngles, forward, NULL, NULL );
+ VectorCopy( forward, v );
+ break;
+
+ case AT_PARTICLE:
+ if( !a->particleValid )
+ return qfalse;
+
+ if( !a->particle->valid )
+ {
+ a->particleValid = qfalse;
+ return qfalse;
+ }
+ else
+ VectorCopy( a->particle->velocity, v );
+ break;
+
+ default:
+ CG_Printf( S_COLOR_RED "ERROR: Invalid attachmentType_t in attachment\n" );
+ break;
+ }
+
+ VectorNormalize( v );
+ return qtrue;
+}
+
+/*
+===============
+CG_AttachmentAxis
+
+Return the attachment axis
+===============
+*/
+qboolean CG_AttachmentAxis( attachment_t *a, vec3_t axis[ 3 ] )
+{
+ centity_t *cent;
+
+ if( !a )
+ return qfalse;
+
+ switch( a->type )
+ {
+ case AT_STATIC:
+ return qfalse;
+ break;
+
+ case AT_TAG:
+ if( !a->tagValid )
+ return qfalse;
+
+ AxisCopy( a->re.axis, axis );
+ break;
+
+ case AT_CENT:
+ if( !a->centValid )
+ return qfalse;
+
+ cent = &cg_entities[ a->centNum ];
+ AnglesToAxis( cent->lerpAngles, axis );
+ break;
+
+ case AT_PARTICLE:
+ return qfalse;
+ break;
+
+ default:
+ CG_Printf( S_COLOR_RED "ERROR: Invalid attachmentType_t in attachment\n" );
+ break;
+ }
+
+ return qtrue;
+}
+
+/*
+===============
+CG_AttachmentVelocity
+
+If the attachment can have velocity, return it
+===============
+*/
+qboolean CG_AttachmentVelocity( attachment_t *a, vec3_t v )
+{
+ if( !a )
+ return qfalse;
+
+ if( a->particleValid && a->particle->valid )
+ {
+ VectorCopy( a->particle->velocity, v );
+ return qtrue;
+ }
+ else if( a->centValid )
+ {
+ centity_t *cent = &cg_entities[ a->centNum ];
+
+ VectorCopy( cent->currentState.pos.trDelta, v );
+ return qtrue;
+ }
+
+ return qfalse;
+}
+
+/*
+===============
+CG_AttachmentCentNum
+
+If the attachment has a centNum, return it
+===============
+*/
+int CG_AttachmentCentNum( attachment_t *a )
+{
+ if( !a || !a->centValid )
+ return -1;
+
+ return a->centNum;
+}
+
+/*
+===============
+CG_Attached
+
+If the attachment is valid, return qtrue
+===============
+*/
+qboolean CG_Attached( attachment_t *a )
+{
+ if( !a )
+ return qfalse;
+
+ return a->attached;
+}
+
+/*
+===============
+CG_AttachToPoint
+
+Attach to a point in space
+===============
+*/
+void CG_AttachToPoint( attachment_t *a )
+{
+ if( !a || !a->staticValid )
+ return;
+
+ a->type = AT_STATIC;
+ a->attached = qtrue;
+}
+
+/*
+===============
+CG_AttachToCent
+
+Attach to a centity_t
+===============
+*/
+void CG_AttachToCent( attachment_t *a )
+{
+ if( !a || !a->centValid )
+ return;
+
+ a->type = AT_CENT;
+ a->attached = qtrue;
+}
+
+/*
+===============
+CG_AttachToTag
+
+Attach to a model tag
+===============
+*/
+void CG_AttachToTag( attachment_t *a )
+{
+ if( !a || !a->tagValid )
+ return;
+
+ a->type = AT_TAG;
+ a->attached = qtrue;
+}
+
+/*
+===============
+CG_AttachToParticle
+
+Attach to a particle
+===============
+*/
+void CG_AttachToParticle( attachment_t *a )
+{
+ if( !a || !a->particleValid )
+ return;
+
+ a->type = AT_PARTICLE;
+ a->attached = qtrue;
+}
+
+/*
+===============
+CG_SetAttachmentPoint
+===============
+*/
+void CG_SetAttachmentPoint( attachment_t *a, vec3_t v )
+{
+ if( !a )
+ return;
+
+ VectorCopy( v, a->origin );
+ a->staticValid = qtrue;
+}
+
+/*
+===============
+CG_SetAttachmentCent
+===============
+*/
+void CG_SetAttachmentCent( attachment_t *a, centity_t *cent )
+{
+ if( !a || !cent )
+ return;
+
+ a->centNum = cent->currentState.number;
+ a->centValid = qtrue;
+}
+
+/*
+===============
+CG_SetAttachmentTag
+===============
+*/
+void CG_SetAttachmentTag( attachment_t *a, refEntity_t parent,
+ qhandle_t model, char *tagName )
+{
+ if( !a )
+ return;
+
+ a->parent = parent;
+ a->model = model;
+ strncpy( a->tagName, tagName, MAX_STRING_CHARS );
+ a->tagValid = qtrue;
+}
+
+/*
+===============
+CG_SetAttachmentParticle
+===============
+*/
+void CG_SetAttachmentParticle( attachment_t *a, particle_t *p )
+{
+ if( !a )
+ return;
+
+ a->particle = p;
+ a->particleValid = qtrue;
+}
+
+/*
+===============
+CG_SetAttachmentOffset
+===============
+*/
+void CG_SetAttachmentOffset( attachment_t *a, vec3_t v )
+{
+ if( !a )
+ return;
+
+ VectorCopy( v, a->offset );
+ a->hasOffset = qtrue;
+}
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