mirror of
https://github.com/w23/xash3d-fwgs
synced 2024-11-15 22:46:23 +01:00
5e0a0765ce
The `.editorconfig` file in this repo is configured to trim all trailing
whitespace regardless of whether the line is modified.
Trims all trailing whitespace in the repository to make the codebase easier
to work with in editors that respect `.editorconfig`.
`git blame` becomes less useful on these lines but it already isn't very useful.
Commands:
```
find . -type f -name '*.h' -exec sed --in-place 's/[[:space:]]\+$//' {} \+
find . -type f -name '*.c' -exec sed --in-place 's/[[:space:]]\+$//' {} \+
```
1301 lines
31 KiB
C
1301 lines
31 KiB
C
/*
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gl_beams.c - beams rendering
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Copyright (C) 2009 Uncle Mike
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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*/
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#include "gl_local.h"
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#include "r_efx.h"
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#include "event_flags.h"
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#include "entity_types.h"
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#include "triangleapi.h"
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#include "customentity.h"
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#include "cl_tent.h"
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#include "pm_local.h"
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#include "studio.h"
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#define NOISE_DIVISIONS 64 // don't touch - many tripmines cause the crash when it equal 128
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typedef struct
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{
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vec3_t pos;
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float texcoord; // Y texture coordinate
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float width;
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} beamseg_t;
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/*
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==============================================================
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FRACTAL NOISE
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==============================================================
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*/
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static float rgNoise[NOISE_DIVISIONS+1]; // global noise array
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// freq2 += step * 0.1;
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// Fractal noise generator, power of 2 wavelength
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static void FracNoise( float *noise, int divs )
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{
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int div2;
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div2 = divs >> 1;
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if( divs < 2 ) return;
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// noise is normalized to +/- scale
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noise[div2] = ( noise[0] + noise[divs] ) * 0.5f + divs * gEngfuncs.COM_RandomFloat( -0.125f, 0.125f );
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if( div2 > 1 )
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{
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FracNoise( &noise[div2], div2 );
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FracNoise( noise, div2 );
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}
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}
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static void SineNoise( float *noise, int divs )
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{
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float freq = 0;
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float step = M_PI_F / (float)divs;
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int i;
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for( i = 0; i < divs; i++ )
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{
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noise[i] = sin( freq );
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freq += step;
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}
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}
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/*
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==============================================================
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BEAM MATHLIB
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==============================================================
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*/
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static void R_BeamComputePerpendicular( const vec3_t vecBeamDelta, vec3_t pPerp )
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{
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// direction in worldspace of the center of the beam
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vec3_t vecBeamCenter;
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VectorNormalize2( vecBeamDelta, vecBeamCenter );
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CrossProduct( RI.vforward, vecBeamCenter, pPerp );
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VectorNormalize( pPerp );
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}
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static void R_BeamComputeNormal( const vec3_t vStartPos, const vec3_t vNextPos, vec3_t pNormal )
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{
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// vTangentY = line vector for beam
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vec3_t vTangentY, vDirToBeam;
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VectorSubtract( vStartPos, vNextPos, vTangentY );
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// vDirToBeam = vector from viewer origin to beam
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VectorSubtract( vStartPos, RI.vieworg, vDirToBeam );
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// get a vector that is perpendicular to us and perpendicular to the beam.
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// this is used to fatten the beam.
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CrossProduct( vTangentY, vDirToBeam, pNormal );
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VectorNormalizeFast( pNormal );
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}
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/*
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==============
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R_BeamCull
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Cull the beam by bbox
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==============
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*/
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qboolean R_BeamCull( const vec3_t start, const vec3_t end, qboolean pvsOnly )
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{
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vec3_t mins, maxs;
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int i;
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for( i = 0; i < 3; i++ )
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{
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if( start[i] < end[i] )
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{
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mins[i] = start[i];
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maxs[i] = end[i];
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}
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else
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{
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mins[i] = end[i];
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maxs[i] = start[i];
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}
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// don't let it be zero sized
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if( mins[i] == maxs[i] )
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maxs[i] += 1.0f;
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}
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// check bbox
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if( gEngfuncs.Mod_BoxVisible( mins, maxs, Mod_GetCurrentVis( )))
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{
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if( pvsOnly || !R_CullBox( mins, maxs ))
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{
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// beam is visible
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return false;
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}
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}
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// beam is culled
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return true;
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}
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/*
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================
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CL_AddCustomBeam
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Add the beam that encoded as custom entity
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================
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*/
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void CL_AddCustomBeam( cl_entity_t *pEnvBeam )
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{
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if( tr.draw_list->num_beam_entities >= MAX_VISIBLE_PACKET )
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{
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gEngfuncs.Con_Printf( S_ERROR "Too many beams %d!\n", tr.draw_list->num_beam_entities );
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return;
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}
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if( pEnvBeam )
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{
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tr.draw_list->beam_entities[tr.draw_list->num_beam_entities] = pEnvBeam;
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tr.draw_list->num_beam_entities++;
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}
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}
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/*
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==============================================================
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BEAM DRAW METHODS
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==============================================================
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*/
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/*
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================
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R_DrawSegs
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general code for drawing beams
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================
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*/
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static void R_DrawSegs( vec3_t source, vec3_t delta, float width, float scale, float freq, float speed, int segments, int flags )
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{
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int noiseIndex, noiseStep;
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int i, total_segs, segs_drawn;
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float div, length, fraction, factor;
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float flMaxWidth, vLast, vStep, brightness;
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vec3_t perp1, vLastNormal;
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beamseg_t curSeg;
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if( segments < 2 ) return;
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length = VectorLength( delta );
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flMaxWidth = width * 0.5f;
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div = 1.0f / ( segments - 1 );
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if( length * div < flMaxWidth * 1.414f )
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{
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// here, we have too many segments; we could get overlap... so lets have less segments
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segments = (int)( length / ( flMaxWidth * 1.414f )) + 1.0f;
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if( segments < 2 ) segments = 2;
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}
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if( segments > NOISE_DIVISIONS )
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segments = NOISE_DIVISIONS;
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div = 1.0f / (segments - 1);
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length *= 0.01f;
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vStep = length * div; // Texture length texels per space pixel
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// Scroll speed 3.5 -- initial texture position, scrolls 3.5/sec (1.0 is entire texture)
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vLast = fmod( freq * speed, 1 );
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if( flags & FBEAM_SINENOISE )
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{
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if( segments < 16 )
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{
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segments = 16;
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div = 1.0f / ( segments - 1 );
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}
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scale *= 100.0f;
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length = segments * 0.1f;
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}
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else
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{
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scale *= length * 2.0f;
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}
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// Iterator to resample noise waveform (it needs to be generated in powers of 2)
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noiseStep = (int)((float)( NOISE_DIVISIONS - 1 ) * div * 65536.0f );
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brightness = 1.0f;
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noiseIndex = 0;
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if( FBitSet( flags, FBEAM_SHADEIN ))
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brightness = 0;
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// Choose two vectors that are perpendicular to the beam
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R_BeamComputePerpendicular( delta, perp1 );
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total_segs = segments;
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segs_drawn = 0;
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// specify all the segments.
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for( i = 0; i < segments; i++ )
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{
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beamseg_t nextSeg;
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vec3_t vPoint1, vPoint2;
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Assert( noiseIndex < ( NOISE_DIVISIONS << 16 ));
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fraction = i * div;
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VectorMA( source, fraction, delta, nextSeg.pos );
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// distort using noise
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if( scale != 0 )
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{
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factor = rgNoise[noiseIndex>>16] * scale;
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if( FBitSet( flags, FBEAM_SINENOISE ))
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{
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float s, c;
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SinCos( fraction * M_PI_F * length + freq, &s, &c );
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VectorMA( nextSeg.pos, (factor * s), RI.vup, nextSeg.pos );
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// rotate the noise along the perpendicluar axis a bit to keep the bolt from looking diagonal
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VectorMA( nextSeg.pos, (factor * c), RI.vright, nextSeg.pos );
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}
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else
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{
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VectorMA( nextSeg.pos, factor, perp1, nextSeg.pos );
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}
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}
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// specify the next segment.
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nextSeg.width = width * 2.0f;
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nextSeg.texcoord = vLast;
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if( segs_drawn > 0 )
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{
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// Get a vector that is perpendicular to us and perpendicular to the beam.
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// This is used to fatten the beam.
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vec3_t vNormal, vAveNormal;
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R_BeamComputeNormal( curSeg.pos, nextSeg.pos, vNormal );
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if( segs_drawn > 1 )
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{
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// Average this with the previous normal
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VectorAdd( vNormal, vLastNormal, vAveNormal );
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VectorScale( vAveNormal, 0.5f, vAveNormal );
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VectorNormalizeFast( vAveNormal );
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}
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else
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{
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VectorCopy( vNormal, vAveNormal );
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}
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VectorCopy( vNormal, vLastNormal );
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// draw regular segment
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VectorMA( curSeg.pos, ( curSeg.width * 0.5f ), vAveNormal, vPoint1 );
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VectorMA( curSeg.pos, (-curSeg.width * 0.5f ), vAveNormal, vPoint2 );
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pglTexCoord2f( 0.0f, curSeg.texcoord );
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TriBrightness( brightness );
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pglNormal3fv( vAveNormal );
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pglVertex3fv( vPoint1 );
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pglTexCoord2f( 1.0f, curSeg.texcoord );
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TriBrightness( brightness );
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pglNormal3fv( vAveNormal );
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pglVertex3fv( vPoint2 );
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}
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curSeg = nextSeg;
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segs_drawn++;
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if( FBitSet( flags, FBEAM_SHADEIN ) && FBitSet( flags, FBEAM_SHADEOUT ))
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{
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if( fraction < 0.5f ) brightness = fraction;
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else brightness = ( 1.0f - fraction );
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}
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else if( FBitSet( flags, FBEAM_SHADEIN ))
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{
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brightness = fraction;
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}
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else if( FBitSet( flags, FBEAM_SHADEOUT ))
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{
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brightness = 1.0f - fraction;
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}
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if( segs_drawn == total_segs )
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{
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// draw the last segment
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VectorMA( curSeg.pos, ( curSeg.width * 0.5f ), vLastNormal, vPoint1 );
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VectorMA( curSeg.pos, (-curSeg.width * 0.5f ), vLastNormal, vPoint2 );
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// specify the points.
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pglTexCoord2f( 0.0f, curSeg.texcoord );
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TriBrightness( brightness );
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pglNormal3fv( vLastNormal );
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pglVertex3fv( vPoint1 );
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pglTexCoord2f( 1.0f, curSeg.texcoord );
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TriBrightness( brightness );
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pglNormal3fv( vLastNormal );
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pglVertex3fv( vPoint2 );
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}
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vLast += vStep; // Advance texture scroll (v axis only)
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noiseIndex += noiseStep;
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}
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}
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/*
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================
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R_DrawTorus
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Draw beamtours
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================
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*/
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void R_DrawTorus( vec3_t source, vec3_t delta, float width, float scale, float freq, float speed, int segments )
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{
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int i, noiseIndex, noiseStep;
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float div, length, fraction, factor, vLast, vStep;
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vec3_t last1, last2, point, screen, screenLast, tmp, normal;
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if( segments < 2 )
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return;
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if( segments > NOISE_DIVISIONS )
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segments = NOISE_DIVISIONS;
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length = VectorLength( delta ) * 0.01f;
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if( length < 0.5f ) length = 0.5f; // don't lose all of the noise/texture on short beams
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div = 1.0f / (segments - 1);
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vStep = length * div; // Texture length texels per space pixel
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// Scroll speed 3.5 -- initial texture position, scrolls 3.5/sec (1.0 is entire texture)
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vLast = fmod( freq * speed, 1 );
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scale = scale * length;
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// Iterator to resample noise waveform (it needs to be generated in powers of 2)
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noiseStep = (int)((float)( NOISE_DIVISIONS - 1 ) * div * 65536.0f );
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noiseIndex = 0;
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for( i = 0; i < segments; i++ )
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{
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float s, c;
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fraction = i * div;
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SinCos( fraction * M_PI2_F, &s, &c );
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point[0] = s * freq * delta[2] + source[0];
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point[1] = c * freq * delta[2] + source[1];
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point[2] = source[2];
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// distort using noise
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if( scale != 0 )
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{
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if(( noiseIndex >> 16 ) < NOISE_DIVISIONS )
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{
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factor = rgNoise[noiseIndex>>16] * scale;
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VectorMA( point, factor, RI.vup, point );
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// rotate the noise along the perpendicluar axis a bit to keep the bolt from looking diagonal
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factor = rgNoise[noiseIndex>>16] * scale * cos( fraction * M_PI_F * 3 + freq );
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VectorMA( point, factor, RI.vright, point );
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}
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}
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// Transform point into screen space
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TriWorldToScreen( point, screen );
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if( i != 0 )
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{
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// build world-space normal to screen-space direction vector
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VectorSubtract( screen, screenLast, tmp );
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// we don't need Z, we're in screen space
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tmp[2] = 0;
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VectorNormalize( tmp );
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VectorScale( RI.vup, -tmp[0], normal ); // Build point along noraml line (normal is -y, x)
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VectorMA( normal, tmp[1], RI.vright, normal );
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// Make a wide line
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VectorMA( point, width, normal, last1 );
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VectorMA( point, -width, normal, last2 );
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vLast += vStep; // advance texture scroll (v axis only)
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TriTexCoord2f( 1, vLast );
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TriVertex3fv( last2 );
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TriTexCoord2f( 0, vLast );
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TriVertex3fv( last1 );
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}
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VectorCopy( screen, screenLast );
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noiseIndex += noiseStep;
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}
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}
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/*
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================
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R_DrawDisk
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Draw beamdisk
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================
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*/
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void R_DrawDisk( vec3_t source, vec3_t delta, float width, float scale, float freq, float speed, int segments )
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{
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float div, length, fraction;
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float w, vLast, vStep;
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vec3_t point;
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int i;
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if( segments < 2 )
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return;
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if( segments > NOISE_DIVISIONS ) // UNDONE: Allow more segments?
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segments = NOISE_DIVISIONS;
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length = VectorLength( delta ) * 0.01f;
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if( length < 0.5f ) length = 0.5f; // don't lose all of the noise/texture on short beams
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div = 1.0f / (segments - 1);
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vStep = length * div; // Texture length texels per space pixel
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// scroll speed 3.5 -- initial texture position, scrolls 3.5/sec (1.0 is entire texture)
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vLast = fmod( freq * speed, 1 );
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scale = scale * length;
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// clamp the beam width
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w = fmod( freq, width * 0.1f ) * delta[2];
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// NOTE: we must force the degenerate triangles to be on the edge
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for( i = 0; i < segments; i++ )
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{
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float s, c;
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fraction = i * div;
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VectorCopy( source, point );
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TriBrightness( 1.0f );
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TriTexCoord2f( 1.0f, vLast );
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TriVertex3fv( point );
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SinCos( fraction * M_PI2_F, &s, &c );
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point[0] = s * w + source[0];
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point[1] = c * w + source[1];
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point[2] = source[2];
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TriBrightness( 1.0f );
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TriTexCoord2f( 0.0f, vLast );
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TriVertex3fv( point );
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vLast += vStep; // advance texture scroll (v axis only)
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}
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}
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/*
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================
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R_DrawCylinder
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Draw beam cylinder
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================
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*/
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void R_DrawCylinder( vec3_t source, vec3_t delta, float width, float scale, float freq, float speed, int segments )
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{
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float div, length, fraction;
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float vLast, vStep;
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vec3_t point;
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int i;
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if( segments < 2 )
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return;
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if( segments > NOISE_DIVISIONS )
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segments = NOISE_DIVISIONS;
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length = VectorLength( delta ) * 0.01f;
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if( length < 0.5f ) length = 0.5f; // don't lose all of the noise/texture on short beams
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div = 1.0f / (segments - 1);
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vStep = length * div; // texture length texels per space pixel
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|
|
// Scroll speed 3.5 -- initial texture position, scrolls 3.5/sec (1.0 is entire texture)
|
|
vLast = fmod( freq * speed, 1 );
|
|
scale = scale * length;
|
|
|
|
for ( i = 0; i < segments; i++ )
|
|
{
|
|
float s, c;
|
|
|
|
fraction = i * div;
|
|
SinCos( fraction * M_PI2_F, &s, &c );
|
|
|
|
point[0] = s * freq * delta[2] + source[0];
|
|
point[1] = c * freq * delta[2] + source[1];
|
|
point[2] = source[2] + width;
|
|
|
|
TriBrightness( 0 );
|
|
TriTexCoord2f( 1, vLast );
|
|
TriVertex3fv( point );
|
|
|
|
point[0] = s * freq * ( delta[2] + width ) + source[0];
|
|
point[1] = c * freq * ( delta[2] + width ) + source[1];
|
|
point[2] = source[2] - width;
|
|
|
|
TriBrightness( 1 );
|
|
TriTexCoord2f( 0, vLast );
|
|
TriVertex3fv( point );
|
|
|
|
vLast += vStep; // Advance texture scroll (v axis only)
|
|
}
|
|
}
|
|
|
|
/*
|
|
==============
|
|
R_DrawBeamFollow
|
|
|
|
drawi followed beam
|
|
==============
|
|
*/
|
|
void R_DrawBeamFollow( BEAM *pbeam, float frametime )
|
|
{
|
|
particle_t *pnew, *particles;
|
|
float fraction, div, vLast, vStep;
|
|
vec3_t last1, last2, tmp, screen;
|
|
vec3_t delta, screenLast, normal;
|
|
|
|
gEngfuncs.R_FreeDeadParticles( &pbeam->particles );
|
|
|
|
particles = pbeam->particles;
|
|
pnew = NULL;
|
|
|
|
div = 0;
|
|
if( FBitSet( pbeam->flags, FBEAM_STARTENTITY ))
|
|
{
|
|
if( particles )
|
|
{
|
|
VectorSubtract( particles->org, pbeam->source, delta );
|
|
div = VectorLength( delta );
|
|
|
|
if( div >= 32 )
|
|
{
|
|
pnew = gEngfuncs.CL_AllocParticleFast();
|
|
}
|
|
}
|
|
else
|
|
{
|
|
pnew = gEngfuncs.CL_AllocParticleFast();
|
|
}
|
|
}
|
|
|
|
if( pnew )
|
|
{
|
|
VectorCopy( pbeam->source, pnew->org );
|
|
pnew->die = gpGlobals->time + pbeam->amplitude;
|
|
VectorClear( pnew->vel );
|
|
|
|
pnew->next = particles;
|
|
pbeam->particles = pnew;
|
|
particles = pnew;
|
|
}
|
|
|
|
// nothing to draw
|
|
if( !particles ) return;
|
|
|
|
if( !pnew && div != 0 )
|
|
{
|
|
VectorCopy( pbeam->source, delta );
|
|
TriWorldToScreen( pbeam->source, screenLast );
|
|
TriWorldToScreen( particles->org, screen );
|
|
}
|
|
else if( particles && particles->next )
|
|
{
|
|
VectorCopy( particles->org, delta );
|
|
TriWorldToScreen( particles->org, screenLast );
|
|
TriWorldToScreen( particles->next->org, screen );
|
|
particles = particles->next;
|
|
}
|
|
else
|
|
{
|
|
return;
|
|
}
|
|
|
|
// UNDONE: This won't work, screen and screenLast must be extrapolated here to fix the
|
|
// first beam segment for this trail
|
|
|
|
// build world-space normal to screen-space direction vector
|
|
VectorSubtract( screen, screenLast, tmp );
|
|
// we don't need Z, we're in screen space
|
|
tmp[2] = 0;
|
|
VectorNormalize( tmp );
|
|
|
|
// Build point along noraml line (normal is -y, x)
|
|
VectorScale( RI.vup, tmp[0], normal ); // Build point along normal line (normal is -y, x)
|
|
VectorMA( normal, tmp[1], RI.vright, normal );
|
|
|
|
// Make a wide line
|
|
VectorMA( delta, pbeam->width, normal, last1 );
|
|
VectorMA( delta, -pbeam->width, normal, last2 );
|
|
|
|
div = 1.0f / pbeam->amplitude;
|
|
fraction = ( pbeam->die - gpGlobals->time ) * div;
|
|
|
|
vLast = 0.0f;
|
|
vStep = 1.0f;
|
|
|
|
while( particles )
|
|
{
|
|
TriBrightness( fraction );
|
|
TriTexCoord2f( 1, 1 );
|
|
TriVertex3fv( last2 );
|
|
TriBrightness( fraction );
|
|
TriTexCoord2f( 0, 1 );
|
|
TriVertex3fv( last1 );
|
|
|
|
// Transform point into screen space
|
|
TriWorldToScreen( particles->org, screen );
|
|
// Build world-space normal to screen-space direction vector
|
|
VectorSubtract( screen, screenLast, tmp );
|
|
|
|
// we don't need Z, we're in screen space
|
|
tmp[2] = 0;
|
|
VectorNormalize( tmp );
|
|
VectorScale( RI.vup, tmp[0], normal ); // Build point along noraml line (normal is -y, x)
|
|
VectorMA( normal, tmp[1], RI.vright, normal );
|
|
|
|
// Make a wide line
|
|
VectorMA( particles->org, pbeam->width, normal, last1 );
|
|
VectorMA( particles->org, -pbeam->width, normal, last2 );
|
|
|
|
vLast += vStep; // Advance texture scroll (v axis only)
|
|
|
|
if( particles->next != NULL )
|
|
{
|
|
fraction = (particles->die - gpGlobals->time) * div;
|
|
}
|
|
else
|
|
{
|
|
fraction = 0.0;
|
|
}
|
|
|
|
TriBrightness( fraction );
|
|
TriTexCoord2f( 0, 0 );
|
|
TriVertex3fv( last1 );
|
|
TriBrightness( fraction );
|
|
TriTexCoord2f( 1, 0 );
|
|
TriVertex3fv( last2 );
|
|
|
|
VectorCopy( screen, screenLast );
|
|
|
|
particles = particles->next;
|
|
}
|
|
|
|
// drift popcorn trail if there is a velocity
|
|
particles = pbeam->particles;
|
|
|
|
while( particles )
|
|
{
|
|
VectorMA( particles->org, frametime, particles->vel, particles->org );
|
|
particles = particles->next;
|
|
}
|
|
}
|
|
|
|
/*
|
|
================
|
|
R_DrawRing
|
|
|
|
Draw beamring
|
|
================
|
|
*/
|
|
void R_DrawRing( vec3_t source, vec3_t delta, float width, float amplitude, float freq, float speed, int segments )
|
|
{
|
|
int i, j, noiseIndex, noiseStep;
|
|
float div, length, fraction, factor, vLast, vStep;
|
|
vec3_t last1, last2, point, screen, screenLast;
|
|
vec3_t tmp, normal, center, xaxis, yaxis;
|
|
float radius, x, y, scale;
|
|
|
|
if( segments < 2 )
|
|
return;
|
|
|
|
VectorClear( screenLast );
|
|
segments = segments * M_PI_F;
|
|
|
|
if( segments > NOISE_DIVISIONS * 8 )
|
|
segments = NOISE_DIVISIONS * 8;
|
|
|
|
length = VectorLength( delta ) * 0.01f * M_PI_F;
|
|
if( length < 0.5f ) length = 0.5f; // Don't lose all of the noise/texture on short beams
|
|
|
|
div = 1.0f / ( segments - 1 );
|
|
|
|
vStep = length * div / 8.0f; // texture length texels per space pixel
|
|
|
|
// Scroll speed 3.5 -- initial texture position, scrolls 3.5/sec (1.0 is entire texture)
|
|
vLast = fmod( freq * speed, 1.0f );
|
|
scale = amplitude * length / 8.0f;
|
|
|
|
// Iterator to resample noise waveform (it needs to be generated in powers of 2)
|
|
noiseStep = (int)((float)( NOISE_DIVISIONS - 1 ) * div * 65536.0f ) * 8;
|
|
noiseIndex = 0;
|
|
|
|
VectorScale( delta, 0.5f, delta );
|
|
VectorAdd( source, delta, center );
|
|
|
|
VectorCopy( delta, xaxis );
|
|
radius = VectorLength( xaxis );
|
|
|
|
// cull beamring
|
|
// --------------------------------
|
|
// Compute box center +/- radius
|
|
VectorSet( last1, radius, radius, scale );
|
|
VectorAdd( center, last1, tmp ); // maxs
|
|
VectorSubtract( center, last1, screen ); // mins
|
|
|
|
if( !WORLDMODEL )
|
|
return;
|
|
|
|
// is that box in PVS && frustum?
|
|
if( !gEngfuncs.Mod_BoxVisible( screen, tmp, Mod_GetCurrentVis( )) || R_CullBox( screen, tmp ))
|
|
{
|
|
return;
|
|
}
|
|
|
|
VectorSet( yaxis, xaxis[1], -xaxis[0], 0.0f );
|
|
VectorNormalize( yaxis );
|
|
VectorScale( yaxis, radius, yaxis );
|
|
|
|
j = segments / 8;
|
|
|
|
for( i = 0; i < segments + 1; i++ )
|
|
{
|
|
fraction = i * div;
|
|
SinCos( fraction * M_PI2_F, &x, &y );
|
|
|
|
VectorMAMAM( x, xaxis, y, yaxis, 1.0f, center, point );
|
|
|
|
// distort using noise
|
|
factor = rgNoise[(noiseIndex >> 16) & (NOISE_DIVISIONS - 1)] * scale;
|
|
VectorMA( point, factor, RI.vup, point );
|
|
|
|
// Rotate the noise along the perpendicluar axis a bit to keep the bolt from looking diagonal
|
|
factor = rgNoise[(noiseIndex >> 16) & (NOISE_DIVISIONS - 1)] * scale;
|
|
factor *= cos( fraction * M_PI_F * 24 + freq );
|
|
VectorMA( point, factor, RI.vright, point );
|
|
|
|
// Transform point into screen space
|
|
TriWorldToScreen( point, screen );
|
|
|
|
if( i != 0 )
|
|
{
|
|
// build world-space normal to screen-space direction vector
|
|
VectorSubtract( screen, screenLast, tmp );
|
|
|
|
// we don't need Z, we're in screen space
|
|
tmp[2] = 0;
|
|
VectorNormalize( tmp );
|
|
|
|
// Build point along normal line (normal is -y, x)
|
|
VectorScale( RI.vup, tmp[0], normal );
|
|
VectorMA( normal, tmp[1], RI.vright, normal );
|
|
|
|
// Make a wide line
|
|
VectorMA( point, width, normal, last1 );
|
|
VectorMA( point, -width, normal, last2 );
|
|
|
|
vLast += vStep; // Advance texture scroll (v axis only)
|
|
TriTexCoord2f( 1.0f, vLast );
|
|
TriVertex3fv( last2 );
|
|
TriTexCoord2f( 0.0f, vLast );
|
|
TriVertex3fv( last1 );
|
|
}
|
|
|
|
VectorCopy( screen, screenLast );
|
|
noiseIndex += noiseStep;
|
|
j--;
|
|
|
|
if( j == 0 && amplitude != 0 )
|
|
{
|
|
j = segments / 8;
|
|
FracNoise( rgNoise, NOISE_DIVISIONS );
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
==============
|
|
R_BeamComputePoint
|
|
|
|
compute attachment point for beam
|
|
==============
|
|
*/
|
|
static qboolean R_BeamComputePoint( int beamEnt, vec3_t pt )
|
|
{
|
|
cl_entity_t *ent;
|
|
int attach;
|
|
|
|
ent = gEngfuncs.R_BeamGetEntity( beamEnt );
|
|
|
|
if( beamEnt < 0 )
|
|
attach = BEAMENT_ATTACHMENT( -beamEnt );
|
|
else attach = BEAMENT_ATTACHMENT( beamEnt );
|
|
|
|
if( !ent )
|
|
{
|
|
gEngfuncs.Con_DPrintf( S_ERROR "R_BeamComputePoint: invalid entity %i\n", BEAMENT_ENTITY( beamEnt ));
|
|
VectorClear( pt );
|
|
return false;
|
|
}
|
|
|
|
// get attachment
|
|
if( attach > 0 )
|
|
VectorCopy( ent->attachment[attach - 1], pt );
|
|
else if( ent->index == ENGINE_GET_PARM( PARM_PLAYER_INDEX ) )
|
|
{
|
|
vec3_t simorg;
|
|
gEngfuncs.GetPredictedOrigin( simorg );
|
|
VectorCopy( simorg, pt );
|
|
}
|
|
else VectorCopy( ent->origin, pt );
|
|
|
|
return true;
|
|
}
|
|
|
|
/*
|
|
==============
|
|
R_BeamRecomputeEndpoints
|
|
|
|
Recomputes beam endpoints..
|
|
==============
|
|
*/
|
|
qboolean R_BeamRecomputeEndpoints( BEAM *pbeam )
|
|
{
|
|
if( FBitSet( pbeam->flags, FBEAM_STARTENTITY ))
|
|
{
|
|
cl_entity_t *start = gEngfuncs.R_BeamGetEntity( pbeam->startEntity );
|
|
|
|
if( R_BeamComputePoint( pbeam->startEntity, pbeam->source ))
|
|
{
|
|
if( !pbeam->pFollowModel )
|
|
pbeam->pFollowModel = start->model;
|
|
SetBits( pbeam->flags, FBEAM_STARTVISIBLE );
|
|
}
|
|
else if( !FBitSet( pbeam->flags, FBEAM_FOREVER ))
|
|
{
|
|
ClearBits( pbeam->flags, FBEAM_STARTENTITY );
|
|
}
|
|
}
|
|
|
|
if( FBitSet( pbeam->flags, FBEAM_ENDENTITY ))
|
|
{
|
|
cl_entity_t *end = gEngfuncs.R_BeamGetEntity( pbeam->endEntity );
|
|
|
|
if( R_BeamComputePoint( pbeam->endEntity, pbeam->target ))
|
|
{
|
|
if( !pbeam->pFollowModel )
|
|
pbeam->pFollowModel = end->model;
|
|
SetBits( pbeam->flags, FBEAM_ENDVISIBLE );
|
|
}
|
|
else if( !FBitSet( pbeam->flags, FBEAM_FOREVER ))
|
|
{
|
|
ClearBits( pbeam->flags, FBEAM_ENDENTITY );
|
|
pbeam->die = gpGlobals->time;
|
|
return false;
|
|
}
|
|
else
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
|
|
if( FBitSet( pbeam->flags, FBEAM_STARTENTITY ) && !FBitSet( pbeam->flags, FBEAM_STARTVISIBLE ))
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
|
|
/*
|
|
==============
|
|
R_BeamDraw
|
|
|
|
Update beam vars and draw it
|
|
==============
|
|
*/
|
|
void R_BeamDraw( BEAM *pbeam, float frametime )
|
|
{
|
|
model_t *model;
|
|
vec3_t delta;
|
|
|
|
model = gEngfuncs.pfnGetModelByIndex( pbeam->modelIndex );
|
|
SetBits( pbeam->flags, FBEAM_ISACTIVE );
|
|
|
|
if( !model || model->type != mod_sprite )
|
|
{
|
|
pbeam->flags &= ~FBEAM_ISACTIVE; // force to ignore
|
|
pbeam->die = gpGlobals->time;
|
|
return;
|
|
}
|
|
|
|
// update frequency
|
|
pbeam->freq += frametime;
|
|
|
|
// generate fractal noise
|
|
if( frametime != 0.0f )
|
|
{
|
|
rgNoise[0] = 0;
|
|
rgNoise[NOISE_DIVISIONS] = 0;
|
|
}
|
|
|
|
if( pbeam->amplitude != 0 && frametime != 0.0f )
|
|
{
|
|
if( FBitSet( pbeam->flags, FBEAM_SINENOISE ))
|
|
SineNoise( rgNoise, NOISE_DIVISIONS );
|
|
else FracNoise( rgNoise, NOISE_DIVISIONS );
|
|
}
|
|
|
|
// update end points
|
|
if( FBitSet( pbeam->flags, FBEAM_STARTENTITY|FBEAM_ENDENTITY ))
|
|
{
|
|
// makes sure attachment[0] + attachment[1] are valid
|
|
if( !R_BeamRecomputeEndpoints( pbeam ))
|
|
{
|
|
ClearBits( pbeam->flags, FBEAM_ISACTIVE ); // force to ignore
|
|
return;
|
|
}
|
|
|
|
// compute segments from the new endpoints
|
|
VectorSubtract( pbeam->target, pbeam->source, delta );
|
|
VectorClear( pbeam->delta );
|
|
|
|
if( VectorLength( delta ) > 0.0000001f )
|
|
VectorCopy( delta, pbeam->delta );
|
|
|
|
if( pbeam->amplitude >= 0.50f )
|
|
pbeam->segments = VectorLength( pbeam->delta ) * 0.25f + 3.0f; // one per 4 pixels
|
|
else pbeam->segments = VectorLength( pbeam->delta ) * 0.075f + 3.0f; // one per 16 pixels
|
|
}
|
|
|
|
if( pbeam->type == TE_BEAMPOINTS && R_BeamCull( pbeam->source, pbeam->target, 0 ))
|
|
{
|
|
ClearBits( pbeam->flags, FBEAM_ISACTIVE );
|
|
return;
|
|
}
|
|
|
|
// don't draw really short or inactive beams
|
|
if( !FBitSet( pbeam->flags, FBEAM_ISACTIVE ) || VectorLength( pbeam->delta ) < 0.1f )
|
|
{
|
|
return;
|
|
}
|
|
|
|
if( pbeam->flags & ( FBEAM_FADEIN|FBEAM_FADEOUT ))
|
|
{
|
|
// update life cycle
|
|
pbeam->t = pbeam->freq + ( pbeam->die - gpGlobals->time );
|
|
if( pbeam->t != 0.0f ) pbeam->t = 1.0f - pbeam->freq / pbeam->t;
|
|
}
|
|
|
|
if( pbeam->type == TE_BEAMHOSE )
|
|
{
|
|
float flDot;
|
|
|
|
VectorSubtract( pbeam->target, pbeam->source, delta );
|
|
VectorNormalize( delta );
|
|
|
|
flDot = DotProduct( delta, RI.vforward );
|
|
|
|
// abort if the player's looking along it away from the source
|
|
if( flDot > 0 )
|
|
{
|
|
return;
|
|
}
|
|
else
|
|
{
|
|
float flFade = pow( flDot, 10 );
|
|
vec3_t localDir, vecProjection, tmp;
|
|
float flDistance;
|
|
|
|
// fade the beam if the player's not looking at the source
|
|
VectorSubtract( RI.vieworg, pbeam->source, localDir );
|
|
flDot = DotProduct( delta, localDir );
|
|
VectorScale( delta, flDot, vecProjection );
|
|
VectorSubtract( localDir, vecProjection, tmp );
|
|
flDistance = VectorLength( tmp );
|
|
|
|
if( flDistance > 30 )
|
|
{
|
|
flDistance = 1.0f - (( flDistance - 30.0f ) / 64.0f );
|
|
if( flDistance <= 0 ) flFade = 0;
|
|
else flFade *= pow( flDistance, 3 );
|
|
}
|
|
|
|
if( flFade < ( 1.0f / 255.0f ))
|
|
return;
|
|
|
|
// FIXME: needs to be testing
|
|
pbeam->brightness *= flFade;
|
|
}
|
|
}
|
|
|
|
TriRenderMode( FBitSet( pbeam->flags, FBEAM_SOLID ) ? kRenderNormal : kRenderTransAdd );
|
|
|
|
if( !TriSpriteTexture( model, (int)(pbeam->frame + pbeam->frameRate * gpGlobals->time) % pbeam->frameCount ))
|
|
{
|
|
ClearBits( pbeam->flags, FBEAM_ISACTIVE );
|
|
return;
|
|
}
|
|
|
|
if( pbeam->type == TE_BEAMFOLLOW )
|
|
{
|
|
cl_entity_t *pStart;
|
|
|
|
// XASH SPECIFIC: get brightness from head entity
|
|
pStart = gEngfuncs.R_BeamGetEntity( pbeam->startEntity );
|
|
if( pStart && pStart->curstate.rendermode != kRenderNormal )
|
|
pbeam->brightness = CL_FxBlend( pStart ) / 255.0f;
|
|
}
|
|
|
|
if( FBitSet( pbeam->flags, FBEAM_FADEIN ))
|
|
TriColor4f( pbeam->r, pbeam->g, pbeam->b, pbeam->t * pbeam->brightness );
|
|
else if( FBitSet( pbeam->flags, FBEAM_FADEOUT ))
|
|
TriColor4f( pbeam->r, pbeam->g, pbeam->b, ( 1.0f - pbeam->t ) * pbeam->brightness );
|
|
else TriColor4f( pbeam->r, pbeam->g, pbeam->b, pbeam->brightness );
|
|
|
|
switch( pbeam->type )
|
|
{
|
|
case TE_BEAMTORUS:
|
|
GL_Cull( GL_NONE );
|
|
TriBegin( TRI_TRIANGLE_STRIP );
|
|
R_DrawTorus( pbeam->source, pbeam->delta, pbeam->width, pbeam->amplitude, pbeam->freq, pbeam->speed, pbeam->segments );
|
|
TriEnd();
|
|
break;
|
|
case TE_BEAMDISK:
|
|
GL_Cull( GL_NONE );
|
|
TriBegin( TRI_TRIANGLE_STRIP );
|
|
R_DrawDisk( pbeam->source, pbeam->delta, pbeam->width, pbeam->amplitude, pbeam->freq, pbeam->speed, pbeam->segments );
|
|
TriEnd();
|
|
break;
|
|
case TE_BEAMCYLINDER:
|
|
GL_Cull( GL_NONE );
|
|
TriBegin( TRI_TRIANGLE_STRIP );
|
|
R_DrawCylinder( pbeam->source, pbeam->delta, pbeam->width, pbeam->amplitude, pbeam->freq, pbeam->speed, pbeam->segments );
|
|
TriEnd();
|
|
break;
|
|
case TE_BEAMPOINTS:
|
|
case TE_BEAMHOSE:
|
|
TriBegin( TRI_TRIANGLE_STRIP );
|
|
R_DrawSegs( pbeam->source, pbeam->delta, pbeam->width, pbeam->amplitude, pbeam->freq, pbeam->speed, pbeam->segments, pbeam->flags );
|
|
TriEnd();
|
|
break;
|
|
case TE_BEAMFOLLOW:
|
|
TriBegin( TRI_QUADS );
|
|
R_DrawBeamFollow( pbeam, frametime );
|
|
TriEnd();
|
|
break;
|
|
case TE_BEAMRING:
|
|
GL_Cull( GL_NONE );
|
|
TriBegin( TRI_TRIANGLE_STRIP );
|
|
R_DrawRing( pbeam->source, pbeam->delta, pbeam->width, pbeam->amplitude, pbeam->freq, pbeam->speed, pbeam->segments );
|
|
TriEnd();
|
|
break;
|
|
}
|
|
|
|
GL_Cull( GL_FRONT );
|
|
r_stats.c_view_beams_count++;
|
|
}
|
|
|
|
/*
|
|
==============
|
|
R_BeamSetAttributes
|
|
|
|
set beam attributes
|
|
==============
|
|
*/
|
|
static void R_BeamSetAttributes( BEAM *pbeam, float r, float g, float b, float framerate, int startFrame )
|
|
{
|
|
pbeam->frame = (float)startFrame;
|
|
pbeam->frameRate = framerate;
|
|
pbeam->r = r;
|
|
pbeam->g = g;
|
|
pbeam->b = b;
|
|
}
|
|
|
|
/*
|
|
==============
|
|
R_BeamSetup
|
|
|
|
generic function. all beams must be
|
|
passed through this
|
|
==============
|
|
*/
|
|
static void R_BeamSetup( BEAM *pbeam, vec3_t start, vec3_t end, int modelIndex, float life, float width, float amplitude, float brightness, float speed )
|
|
{
|
|
model_t *sprite = gEngfuncs.pfnGetModelByIndex( modelIndex );
|
|
|
|
if( !sprite ) return;
|
|
|
|
pbeam->type = BEAM_POINTS;
|
|
pbeam->modelIndex = modelIndex;
|
|
pbeam->frame = 0;
|
|
pbeam->frameRate = 0;
|
|
pbeam->frameCount = sprite->numframes;
|
|
|
|
VectorCopy( start, pbeam->source );
|
|
VectorCopy( end, pbeam->target );
|
|
VectorSubtract( end, start, pbeam->delta );
|
|
|
|
pbeam->freq = speed * gpGlobals->time;
|
|
pbeam->die = life + gpGlobals->time;
|
|
pbeam->amplitude = amplitude;
|
|
pbeam->brightness = brightness;
|
|
pbeam->width = width;
|
|
pbeam->speed = speed;
|
|
|
|
if( amplitude >= 0.50f )
|
|
pbeam->segments = VectorLength( pbeam->delta ) * 0.25f + 3.0f; // one per 4 pixels
|
|
else pbeam->segments = VectorLength( pbeam->delta ) * 0.075f + 3.0f; // one per 16 pixels
|
|
|
|
pbeam->pFollowModel = NULL;
|
|
pbeam->flags = 0;
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
==============
|
|
R_BeamDrawCustomEntity
|
|
|
|
initialize beam from server entity
|
|
==============
|
|
*/
|
|
void R_BeamDrawCustomEntity( cl_entity_t *ent )
|
|
{
|
|
BEAM beam;
|
|
float amp = ent->curstate.body / 100.0f;
|
|
float blend = CL_FxBlend( ent ) / 255.0f;
|
|
float r, g, b;
|
|
int beamFlags;
|
|
|
|
r = ent->curstate.rendercolor.r / 255.0f;
|
|
g = ent->curstate.rendercolor.g / 255.0f;
|
|
b = ent->curstate.rendercolor.b / 255.0f;
|
|
|
|
R_BeamSetup( &beam, ent->origin, ent->angles, ent->curstate.modelindex, 0, ent->curstate.scale, amp, blend, ent->curstate.animtime );
|
|
R_BeamSetAttributes( &beam, r, g, b, ent->curstate.framerate, ent->curstate.frame );
|
|
beam.pFollowModel = NULL;
|
|
|
|
switch( ent->curstate.rendermode & 0x0F )
|
|
{
|
|
case BEAM_ENTPOINT:
|
|
beam.type = TE_BEAMPOINTS;
|
|
if( ent->curstate.sequence )
|
|
{
|
|
SetBits( beam.flags, FBEAM_STARTENTITY );
|
|
beam.startEntity = ent->curstate.sequence;
|
|
}
|
|
if( ent->curstate.skin )
|
|
{
|
|
SetBits( beam.flags, FBEAM_ENDENTITY );
|
|
beam.endEntity = ent->curstate.skin;
|
|
}
|
|
break;
|
|
case BEAM_ENTS:
|
|
beam.type = TE_BEAMPOINTS;
|
|
SetBits( beam.flags, FBEAM_STARTENTITY | FBEAM_ENDENTITY );
|
|
beam.startEntity = ent->curstate.sequence;
|
|
beam.endEntity = ent->curstate.skin;
|
|
break;
|
|
case BEAM_HOSE:
|
|
beam.type = TE_BEAMHOSE;
|
|
break;
|
|
case BEAM_POINTS:
|
|
// already set up
|
|
break;
|
|
}
|
|
|
|
beamFlags = ( ent->curstate.rendermode & 0xF0 );
|
|
|
|
if( FBitSet( beamFlags, BEAM_FSINE ))
|
|
SetBits( beam.flags, FBEAM_SINENOISE );
|
|
|
|
if( FBitSet( beamFlags, BEAM_FSOLID ))
|
|
SetBits( beam.flags, FBEAM_SOLID );
|
|
|
|
if( FBitSet( beamFlags, BEAM_FSHADEIN ))
|
|
SetBits( beam.flags, FBEAM_SHADEIN );
|
|
|
|
if( FBitSet( beamFlags, BEAM_FSHADEOUT ))
|
|
SetBits( beam.flags, FBEAM_SHADEOUT );
|
|
|
|
// draw it
|
|
R_BeamDraw( &beam, tr.frametime );
|
|
}
|
|
|
|
|
|
/*
|
|
==============
|
|
CL_DrawBeams
|
|
|
|
draw beam loop
|
|
==============
|
|
*/
|
|
void CL_DrawBeams( int fTrans, BEAM *active_beams )
|
|
{
|
|
BEAM *pBeam;
|
|
int i, flags;
|
|
|
|
pglShadeModel( GL_SMOOTH );
|
|
pglDepthMask( fTrans ? GL_FALSE : GL_TRUE );
|
|
|
|
// server beams don't allocate beam chains
|
|
// all params are stored in cl_entity_t
|
|
for( i = 0; i < tr.draw_list->num_beam_entities; i++ )
|
|
{
|
|
RI.currentbeam = tr.draw_list->beam_entities[i];
|
|
flags = RI.currentbeam->curstate.rendermode & 0xF0;
|
|
|
|
if( fTrans && FBitSet( flags, FBEAM_SOLID ))
|
|
continue;
|
|
|
|
if( !fTrans && !FBitSet( flags, FBEAM_SOLID ))
|
|
continue;
|
|
|
|
R_BeamDrawCustomEntity( RI.currentbeam );
|
|
r_stats.c_view_beams_count++;
|
|
}
|
|
|
|
RI.currentbeam = NULL;
|
|
|
|
// draw temporary entity beams
|
|
for( pBeam = active_beams; pBeam; pBeam = pBeam->next )
|
|
{
|
|
if( fTrans && FBitSet( pBeam->flags, FBEAM_SOLID ))
|
|
continue;
|
|
|
|
if( !fTrans && !FBitSet( pBeam->flags, FBEAM_SOLID ))
|
|
continue;
|
|
|
|
R_BeamDraw( pBeam, gpGlobals->time - gpGlobals->oldtime );
|
|
}
|
|
|
|
pglShadeModel( GL_FLAT );
|
|
pglDepthMask( GL_TRUE );
|
|
}
|