82 lines
3 KiB
C
82 lines
3 KiB
C
/*
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THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX
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SOFTWARE CORPORATION ("PARALLAX"). PARALLAX, IN DISTRIBUTING THE CODE TO
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END-USERS, AND SUBJECT TO ALL OF THE TERMS AND CONDITIONS HEREIN, GRANTS A
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ROYALTY-FREE, PERPETUAL LICENSE TO SUCH END-USERS FOR USE BY SUCH END-USERS
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IN USING, DISPLAYING, AND CREATING DERIVATIVE WORKS THEREOF, SO LONG AS
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SUCH USE, DISPLAY OR CREATION IS FOR NON-COMMERCIAL, ROYALTY OR REVENUE
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FREE PURPOSES. IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE
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CONTAINED HEREIN FOR REVENUE-BEARING PURPOSES. THE END-USER UNDERSTANDS
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AND AGREES TO THE TERMS HEREIN AND ACCEPTS THE SAME BY USE OF THIS FILE.
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COPYRIGHT 1993-1999 PARALLAX SOFTWARE CORPORATION. ALL RIGHTS RESERVED.
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*/
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#ifndef _FVI_H
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#define _FVI_H
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#include "vecmat.h"
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#include "segment.h"
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#include "object.h"
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//return values for find_vector_intersection() - what did we hit?
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#define HIT_NONE 0 //we hit nothing
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#define HIT_WALL 1 //we hit - guess - a wall
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#define HIT_OBJECT 2 //we hit an object - which one? no way to tell...
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#define HIT_BAD_P0 3 //start point not is specified segment
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#define MAX_FVI_SEGS 100
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//this data structure gets filled in by find_vector_intersection()
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typedef struct fvi_info {
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int hit_type; //what sort of intersection
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vms_vector hit_pnt; //where we hit
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int hit_seg; //what segment hit_pnt is in
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int hit_side; //if hit wall, which side
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int hit_side_seg; //what segment the hit side is in
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int hit_object; //if object hit, which object
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vms_vector hit_wallnorm; //if hit wall, ptr to its surface normal
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int n_segs; //how many segs we went through
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int seglist[MAX_FVI_SEGS]; //list of segs vector went through
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} fvi_info;
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//flags for fvi query
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#define FQ_CHECK_OBJS 1 //check against objects?
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#define FQ_TRANSWALL 2 //go through transparent walls
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#define FQ_TRANSPOINT 4 //go through trans wall if hit point is transparent
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#define FQ_GET_SEGLIST 8 //build a list of segments
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#define FQ_IGNORE_POWERUPS 16 //ignore powerups
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//this data contains the parms to fvi()
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typedef struct fvi_query {
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vms_vector *p0,*p1;
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int startseg;
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fix rad;
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short thisobjnum;
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int *ignore_obj_list;
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int flags;
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} fvi_query;
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//Find out if a vector intersects with anything.
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//Fills in hit_data, an fvi_info structure (see above).
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//Parms:
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// p0 & startseg describe the start of the vector
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// p1 the end of the vector
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// rad the radius of the cylinder
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// thisobjnum used to prevent an object with colliding with itself
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// ingore_obj_list NULL, or ptr to a list of objnums to ignore, terminated with -1
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// check_obj_flag determines whether collisions with objects are checked
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//Returns the hit_data->hit_type
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int find_vector_intersection(fvi_query *fq,fvi_info *hit_data);
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//finds the uv coords of the given point on the given seg & side
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//fills in u & v. if l is non-NULL fills it in also
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void find_hitpoint_uv(fix *u,fix *v,fix *l, vms_vector *pnt,segment *seg,int sidenum,int facenum);
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//Returns true if the object is through any walls
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int object_intersects_wall(object *objp);
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#endif
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