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Diffstat (limited to 'src/game/bg_slidemove.c')
| -rw-r--r-- | src/game/bg_slidemove.c | 408 |
1 files changed, 0 insertions, 408 deletions
diff --git a/src/game/bg_slidemove.c b/src/game/bg_slidemove.c deleted file mode 100644 index 47f1ec04..00000000 --- a/src/game/bg_slidemove.c +++ /dev/null @@ -1,408 +0,0 @@ -// Copyright (C) 1999-2000 Id Software, Inc. -// -// bg_slidemove.c -- part of bg_pmove functionality - -/* - * Portions Copyright (C) 2000-2001 Tim Angus - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the OSML - Open Source Modification License v1.0 as - * described in the file COPYING which is distributed with this source - * code. - * - * This program 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. - */ - -#include "q_shared.h" -#include "bg_public.h" -#include "bg_local.h" - -/* - -input: origin, velocity, bounds, groundPlane, trace function - -output: origin, velocity, impacts, stairup boolean - -*/ - -/* -================== -PM_SlideMove - -Returns qtrue if the velocity was clipped in some way -================== -*/ -#define MAX_CLIP_PLANES 5 -qboolean PM_SlideMove( qboolean gravity ) -{ - int bumpcount, numbumps; - vec3_t dir; - float d; - int numplanes; - vec3_t planes[MAX_CLIP_PLANES]; - vec3_t primal_velocity; - vec3_t clipVelocity; - int i, j, k; - trace_t trace; - vec3_t end; - float time_left; - float into; - vec3_t endVelocity; - vec3_t endClipVelocity; - - numbumps = 4; - - VectorCopy( pm->ps->velocity, primal_velocity ); - - if( gravity ) - { - VectorCopy( pm->ps->velocity, endVelocity ); - endVelocity[ 2 ] -= pm->ps->gravity * pml.frametime; - pm->ps->velocity[ 2 ] = ( pm->ps->velocity[ 2 ] + endVelocity[ 2 ] ) * 0.5; - primal_velocity[ 2 ] = endVelocity[ 2 ]; - - if( pml.groundPlane ) - { - // slide along the ground plane - PM_ClipVelocity( pm->ps->velocity, pml.groundTrace.plane.normal, - pm->ps->velocity, OVERCLIP ); - } - } - - time_left = pml.frametime; - - // never turn against the ground plane - if( pml.groundPlane ) - { - numplanes = 1; - VectorCopy( pml.groundTrace.plane.normal, planes[ 0 ] ); - } - else - numplanes = 0; - - // never turn against original velocity - VectorNormalize2( pm->ps->velocity, planes[ numplanes ] ); - numplanes++; - - for( bumpcount = 0; bumpcount < numbumps; bumpcount++ ) - { - // calculate position we are trying to move to - VectorMA( pm->ps->origin, time_left, pm->ps->velocity, end ); - - // see if we can make it there - pm->trace( &trace, pm->ps->origin, pm->mins, pm->maxs, end, pm->ps->clientNum, pm->tracemask ); - - if( trace.allsolid ) - { - // entity is completely trapped in another solid - pm->ps->velocity[ 2 ] = 0; // don't build up falling damage, but allow sideways acceleration - return qtrue; - } - - if( trace.fraction > 0 ) - { - // actually covered some distance - VectorCopy( trace.endpos, pm->ps->origin ); - } - - if( trace.fraction == 1 ) - break; // moved the entire distance - - // save entity for contact - PM_AddTouchEnt( trace.entityNum ); - - time_left -= time_left * trace.fraction; - - if( numplanes >= MAX_CLIP_PLANES ) - { - // this shouldn't really happen - VectorClear( pm->ps->velocity ); - return qtrue; - } - - // - // if this is the same plane we hit before, nudge velocity - // out along it, which fixes some epsilon issues with - // non-axial planes - // - for( i = 0 ; i < numplanes ; i++ ) - { - if( DotProduct( trace.plane.normal, planes[i] ) > 0.99 ) - { - VectorAdd( trace.plane.normal, pm->ps->velocity, pm->ps->velocity ); - break; - } - } - - if( i < numplanes ) - continue; - - VectorCopy( trace.plane.normal, planes[ numplanes ] ); - numplanes++; - - // - // modify velocity so it parallels all of the clip planes - // - - // find a plane that it enters - for( i = 0; i < numplanes; i++ ) - { - into = DotProduct( pm->ps->velocity, planes[ i ] ); - if( into >= 0.1 ) - continue; // move doesn't interact with the plane - - // see how hard we are hitting things - if( -into > pml.impactSpeed ) - pml.impactSpeed = -into; - - // slide along the plane - PM_ClipVelocity( pm->ps->velocity, planes[ i ], clipVelocity, OVERCLIP ); - - // slide along the plane - PM_ClipVelocity( endVelocity, planes[ i ], endClipVelocity, OVERCLIP ); - - // see if there is a second plane that the new move enters - for( j = 0; j < numplanes; j++ ) - { - if( j == i ) - continue; - - if( DotProduct( clipVelocity, planes[ j ] ) >= 0.1 ) - continue; // move doesn't interact with the plane - - // try clipping the move to the plane - PM_ClipVelocity( clipVelocity, planes[ j ], clipVelocity, OVERCLIP ); - PM_ClipVelocity( endClipVelocity, planes[ j ], endClipVelocity, OVERCLIP ); - - // see if it goes back into the first clip plane - if( DotProduct( clipVelocity, planes[ i ] ) >= 0 ) - continue; - - // slide the original velocity along the crease - CrossProduct( planes[ i ], planes[ j ], dir ); - VectorNormalize( dir ); - d = DotProduct( dir, pm->ps->velocity ); - VectorScale( dir, d, clipVelocity ); - - CrossProduct( planes[ i ], planes[ j ], dir); - VectorNormalize( dir ); - d = DotProduct( dir, endVelocity ); - VectorScale( dir, d, endClipVelocity ); - - // see if there is a third plane the the new move enters - for( k = 0; k < numplanes; k++ ) - { - if( k == i || k == j ) - continue; - - if( DotProduct( clipVelocity, planes[ k ] ) >= 0.1 ) - continue; // move doesn't interact with the plane - - // stop dead at a tripple plane interaction - VectorClear( pm->ps->velocity ); - return qtrue; - } - } - - // if we have fixed all interactions, try another move - VectorCopy( clipVelocity, pm->ps->velocity ); - VectorCopy( endClipVelocity, endVelocity ); - break; - } - } - - if( gravity ) - VectorCopy( endVelocity, pm->ps->velocity ); - - // don't change velocity if in a timer (FIXME: is this correct?) - if( pm->ps->pm_time ) - VectorCopy( primal_velocity, pm->ps->velocity ); - - return ( bumpcount != 0 ); -} - -/* -================== -PM_StepEvent -================== -*/ -void PM_StepEvent( vec3_t from, vec3_t to, vec3_t normal ) -{ - float size; - vec3_t delta, dNormal; - - VectorSubtract( from, to, delta ); - VectorCopy( delta, dNormal ); - VectorNormalize( dNormal ); - - size = DotProduct( normal, dNormal ) * VectorLength( delta ); - - if( size > 0.0f ) - { - if( size > 2.0f ) - { - if( size < 7.0f ) - PM_AddEvent( EV_STEPDN_4 ); - else if( size < 11.0f ) - PM_AddEvent( EV_STEPDN_8 ); - else if( size < 15.0f ) - PM_AddEvent( EV_STEPDN_12 ); - else - PM_AddEvent( EV_STEPDN_16 ); - } - } - else - { - size = fabs( size ); - - if( size > 2.0f ) - { - if( size < 7.0f ) - PM_AddEvent( EV_STEP_4 ); - else if( size < 11.0f ) - PM_AddEvent( EV_STEP_8 ); - else if( size < 15.0f ) - PM_AddEvent( EV_STEP_12 ); - else - PM_AddEvent( EV_STEP_16 ); - } - } - - if( pm->debugLevel ) - Com_Printf( "%i:stepped\n", c_pmove ); -} - -/* -================== -PM_StepSlideMove -================== -*/ -qboolean PM_StepSlideMove( qboolean gravity, qboolean predictive ) -{ - vec3_t start_o, start_v; - vec3_t down_o, down_v; - trace_t trace; - vec3_t normal; - vec3_t step_v, step_vNormal; - vec3_t up, down; - float stepSize; - qboolean stepped = qfalse; - - if( pm->ps->stats[ STAT_STATE ] & SS_WALLCLIMBING ) - { - if( pm->ps->stats[ STAT_STATE ] & SS_WALLCLIMBINGCEILING ) - VectorSet( normal, 0.0f, 0.0f, -1.0f ); - else - VectorCopy( pm->ps->grapplePoint, normal ); - } - else - VectorSet( normal, 0.0f, 0.0f, 1.0f ); - - VectorCopy( pm->ps->origin, start_o ); - VectorCopy( pm->ps->velocity, start_v ); - - if( PM_SlideMove( gravity ) == 0 ) - { - VectorCopy( start_o, down ); - VectorMA( down, -STEPSIZE, normal, down ); - pm->trace( &trace, start_o, pm->mins, pm->maxs, down, pm->ps->clientNum, pm->tracemask ); - - //we can step down - if( trace.fraction > 0.01f && trace.fraction < 1.0f && - !trace.allsolid && pml.groundPlane != qfalse ) - { - if( pm->debugLevel ) - Com_Printf( "%d: step down\n", c_pmove ); - - stepped = qtrue; - } - } - else - { - VectorCopy( start_o, down ); - VectorMA( down, -STEPSIZE, normal, down ); - pm->trace( &trace, start_o, pm->mins, pm->maxs, down, pm->ps->clientNum, pm->tracemask ); - // never step up when you still have up velocity - if( DotProduct( trace.plane.normal, pm->ps->velocity ) > 0.0f && - ( trace.fraction == 1.0f || DotProduct( trace.plane.normal, normal ) < 0.7f ) ) - { - return stepped; - } - - VectorCopy( pm->ps->origin, down_o ); - VectorCopy( pm->ps->velocity, down_v ); - - VectorCopy( start_o, up ); - VectorMA( up, STEPSIZE, normal, up ); - - // test the player position if they were a stepheight higher - pm->trace( &trace, start_o, pm->mins, pm->maxs, up, pm->ps->clientNum, pm->tracemask ); - if( trace.allsolid ) - { - if( pm->debugLevel ) - Com_Printf( "%i:bend can't step\n", c_pmove ); - - return stepped; // can't step up - } - - VectorSubtract( trace.endpos, start_o, step_v ); - VectorCopy( step_v, step_vNormal ); - VectorNormalize( step_vNormal ); - - stepSize = DotProduct( normal, step_vNormal ) * VectorLength( step_v ); - // try slidemove from this position - VectorCopy( trace.endpos, pm->ps->origin ); - VectorCopy( start_v, pm->ps->velocity ); - - if( PM_SlideMove( gravity ) == 0 ) - { - if( pm->debugLevel ) - Com_Printf( "%d: step up\n", c_pmove ); - - stepped = qtrue; - } - - // push down the final amount - VectorCopy( pm->ps->origin, down ); - VectorMA( down, -stepSize, normal, down ); - pm->trace( &trace, pm->ps->origin, pm->mins, pm->maxs, down, pm->ps->clientNum, pm->tracemask ); - - if( !trace.allsolid ) - VectorCopy( trace.endpos, pm->ps->origin ); - - if( trace.fraction < 1.0f ) - PM_ClipVelocity( pm->ps->velocity, trace.plane.normal, pm->ps->velocity, OVERCLIP ); - } - - if( !predictive && stepped ) - PM_StepEvent( start_o, pm->ps->origin, normal ); - - return stepped; -} - -/* -================== -PM_PredictStepMove -================== -*/ -qboolean PM_PredictStepMove( void ) -{ - vec3_t velocity, origin; - float impactSpeed; - qboolean stepped = qfalse; - - VectorCopy( pm->ps->velocity, velocity ); - VectorCopy( pm->ps->origin, origin ); - impactSpeed = pml.impactSpeed; - - if( PM_StepSlideMove( qfalse, qtrue ) ) - stepped = qtrue; - - VectorCopy( velocity, pm->ps->velocity ); - VectorCopy( origin, pm->ps->origin ); - pml.impactSpeed = impactSpeed; - - return stepped; -} |