goom_core.c

来自「linux下的MPEG1」· C语言 代码 · 共 894 行 · 第 1/3 页

                case 8:
                case 18:
                case 19:
                    goomInfo->update.zoomFilterData.mode = SCRUNCH_MODE;
                    goomInfo->update.zoomFilterData.waveEffect = 1;
                    goomInfo->update.zoomFilterData.hypercosEffect = 1;
                    break;
                case 29:
                case 30:
                    goomInfo->update.zoomFilterData.mode = YONLY_MODE;
                    break;
                case 31:
                case 32:
                case 33:
                    goomInfo->update.zoomFilterData.mode = SPEEDWAY_MODE;
                    break;
                default:
                    goomInfo->update.zoomFilterData.mode = NORMAL_MODE;
                    goomInfo->update.zoomFilterData.waveEffect = 0;
                    goomInfo->update.zoomFilterData.hypercosEffect = 0;
            }
    }
        
        /* tout ceci ne sera fait qu'en cas de non-blocage */
        if (goomInfo->update.lockvar == 0) {
            /* reperage de goom (acceleration forte de l'acceleration du volume) */
            /* -> coup de boost de la vitesse si besoin.. */
            if (goomInfo->sound.timeSinceLastGoom == 0) {
                
                int i;
                goomInfo->update.goomvar++;
                
                /* SELECTION OF THE GOOM STATE */
                if ((!goomInfo->update.stateSelectionBlocker)&&(goom_irand(goomInfo->gRandom,3))) {
                    goomInfo->update.stateSelectionRnd = goom_irand(goomInfo->gRandom,goomInfo->statesRangeMax);
                    goomInfo->update.stateSelectionBlocker = 3;
                }
                else if (goomInfo->update.stateSelectionBlocker) goomInfo->update.stateSelectionBlocker--;
                
                for (i=0;i<goomInfo->statesNumber;i++)
                    if ((goomInfo->update.stateSelectionRnd >= goomInfo->states[i].rangemin)
                        && (goomInfo->update.stateSelectionRnd <= goomInfo->states[i].rangemax))
                        goomInfo->curGState = &(goomInfo->states[i]);
                
                if ((goomInfo->curGState->drawIFS) && (goomInfo->update.ifs_incr<=0)) {
                    goomInfo->update.recay_ifs = 5;
                    goomInfo->update.ifs_incr = 11;
                }
                
                if ((!goomInfo->curGState->drawIFS) && (goomInfo->update.ifs_incr>0) && (goomInfo->update.decay_ifs<=0))
                    goomInfo->update.decay_ifs = 100;
                
                if (!goomInfo->curGState->drawScope)
                    goomInfo->update.stop_lines = 0xf000 & 5;
                
                if (!goomInfo->curGState->drawScope) {
                    goomInfo->update.stop_lines = 0;			
                    goomInfo->update.lineMode = goomInfo->update.drawLinesDuration;
                }
                
                /* if (goomInfo->update.goomvar % 1 == 0) */
                {
                    guint32 vtmp;
                    guint32 newvit;
                    
                    goomInfo->update.lockvar = 50;
                    newvit = STOP_SPEED + 1 - ((float)3.5f * log10(goomInfo->sound.speedvar * 60 + 1));
                    /* retablir le zoom avant.. */
                    if ((goomInfo->update.zoomFilterData.reverse) && (!(goomInfo->cycle % 13)) && (rand () % 5 == 0)) {
                        goomInfo->update.zoomFilterData.reverse = 0;
                        goomInfo->update.zoomFilterData.vitesse = STOP_SPEED - 2;
                        goomInfo->update.lockvar = 75;
                    }
                    if (goom_irand(goomInfo->gRandom,10) == 0) {
                        goomInfo->update.zoomFilterData.reverse = 1;
                        goomInfo->update.lockvar = 100;
                    }
                    
                    if (goom_irand(goomInfo->gRandom,10) == 0)
                        goomInfo->update.zoomFilterData.vitesse = STOP_SPEED - 1;
                    if (goom_irand(goomInfo->gRandom,12) == 0)
                        goomInfo->update.zoomFilterData.vitesse = STOP_SPEED + 1;
                    
                    /* changement de milieu.. */
                    switch (goom_irand(goomInfo->gRandom,25)) {
                        case 0:
                        case 3:
                        case 6:
                            goomInfo->update.zoomFilterData.middleY = goomInfo->screen.height - 1;
                            goomInfo->update.zoomFilterData.middleX = goomInfo->screen.width / 2;
                            break;
                        case 1:
                        case 4:
                            goomInfo->update.zoomFilterData.middleX = goomInfo->screen.width - 1;
                            break;
                        case 2:
                        case 5:
                            goomInfo->update.zoomFilterData.middleX = 1;
                            break;
                        default:
                            goomInfo->update.zoomFilterData.middleY = goomInfo->screen.height / 2;
                            goomInfo->update.zoomFilterData.middleX = goomInfo->screen.width / 2;
                    }
                    
                    if ((goomInfo->update.zoomFilterData.mode == WATER_MODE)
                        || (goomInfo->update.zoomFilterData.mode == YONLY_MODE)
                        || (goomInfo->update.zoomFilterData.mode == AMULETTE_MODE)) {
                        goomInfo->update.zoomFilterData.middleX = goomInfo->screen.width / 2;
                        goomInfo->update.zoomFilterData.middleY = goomInfo->screen.height / 2;
                    }
                    
                    switch (vtmp = (goom_irand(goomInfo->gRandom,15))) {
                        case 0:
                            goomInfo->update.zoomFilterData.vPlaneEffect = goom_irand(goomInfo->gRandom,3)
                            - goom_irand(goomInfo->gRandom,3);
                            goomInfo->update.zoomFilterData.hPlaneEffect = goom_irand(goomInfo->gRandom,3)
                                - goom_irand(goomInfo->gRandom,3);
                            break;
                        case 3:
                            goomInfo->update.zoomFilterData.vPlaneEffect = 0;
                            goomInfo->update.zoomFilterData.hPlaneEffect = goom_irand(goomInfo->gRandom,8)
                                - goom_irand(goomInfo->gRandom,8);
                            break;
                        case 4:
                        case 5:
                        case 6:
                        case 7:
                            goomInfo->update.zoomFilterData.vPlaneEffect = goom_irand(goomInfo->gRandom,5)
                            - goom_irand(goomInfo->gRandom,5);
                            goomInfo->update.zoomFilterData.hPlaneEffect = -goomInfo->update.zoomFilterData.vPlaneEffect;
                            break;
                        case 8:
                            goomInfo->update.zoomFilterData.hPlaneEffect = 5 + goom_irand(goomInfo->gRandom,8);
                            goomInfo->update.zoomFilterData.vPlaneEffect = -goomInfo->update.zoomFilterData.hPlaneEffect;
                            break;
                        case 9:
                            goomInfo->update.zoomFilterData.vPlaneEffect = 5 + goom_irand(goomInfo->gRandom,8);
                            goomInfo->update.zoomFilterData.hPlaneEffect = -goomInfo->update.zoomFilterData.hPlaneEffect;
                            break;
                        case 13:
                            goomInfo->update.zoomFilterData.hPlaneEffect = 0;
                            goomInfo->update.zoomFilterData.vPlaneEffect = goom_irand(goomInfo->gRandom,10)
                                - goom_irand(goomInfo->gRandom,10);
                            break;
                        case 14:
                            goomInfo->update.zoomFilterData.hPlaneEffect = goom_irand(goomInfo->gRandom,10)
                            - goom_irand(goomInfo->gRandom,10);
                            goomInfo->update.zoomFilterData.vPlaneEffect = goom_irand(goomInfo->gRandom,10)
                                - goom_irand(goomInfo->gRandom,10);
                            break;
                        default:
                            if (vtmp < 10) {
                                goomInfo->update.zoomFilterData.vPlaneEffect = 0;
                                goomInfo->update.zoomFilterData.hPlaneEffect = 0;
                            }
                    }
                    
                    if (goom_irand(goomInfo->gRandom,5) != 0)
                        goomInfo->update.zoomFilterData.noisify = 0;
                    else {
                        goomInfo->update.zoomFilterData.noisify = goom_irand(goomInfo->gRandom,2) + 1;
                        goomInfo->update.lockvar *= 2;
                    }
                    
                    if (goomInfo->update.zoomFilterData.mode == AMULETTE_MODE) {
                        goomInfo->update.zoomFilterData.vPlaneEffect = 0;
                        goomInfo->update.zoomFilterData.hPlaneEffect = 0;
                        goomInfo->update.zoomFilterData.noisify = 0;
                    }
                    
                    if ((goomInfo->update.zoomFilterData.middleX == 1) || (goomInfo->update.zoomFilterData.middleX == (signed int)goomInfo->screen.width - 1)) {
                        goomInfo->update.zoomFilterData.vPlaneEffect = 0;
                        if (goom_irand(goomInfo->gRandom,2))
                            goomInfo->update.zoomFilterData.hPlaneEffect = 0;
                    }
                    
                    if ((signed int)newvit < goomInfo->update.zoomFilterData.vitesse)	/* on accelere */
                    {
                        pzfd = &goomInfo->update.zoomFilterData;
                        if (((newvit < STOP_SPEED - 7) &&
                             (goomInfo->update.zoomFilterData.vitesse < STOP_SPEED - 6) &&
                             (goomInfo->cycle % 3 == 0)) || (goom_irand(goomInfo->gRandom,40) == 0)) {
                            goomInfo->update.zoomFilterData.vitesse = STOP_SPEED - goom_irand(goomInfo->gRandom,2)
                            + goom_irand(goomInfo->gRandom,2);
                            goomInfo->update.zoomFilterData.reverse = !goomInfo->update.zoomFilterData.reverse;
                        }
                        else {
                            goomInfo->update.zoomFilterData.vitesse = (newvit + goomInfo->update.zoomFilterData.vitesse * 7) / 8;
                        }
                        goomInfo->update.lockvar += 50;
                    }
                }
                
                if (goomInfo->update.lockvar > 150) {
                    goomInfo->update.switchIncr = goomInfo->update.switchIncrAmount;
                    goomInfo->update.switchMult = 1.0f;
                }
            }
            /* mode mega-lent */
            if (goom_irand(goomInfo->gRandom,700) == 0) {
                /* 
                * printf ("coup du sort...\n") ;
                 */
                pzfd = &goomInfo->update.zoomFilterData;
                goomInfo->update.zoomFilterData.vitesse = STOP_SPEED - 1;
                goomInfo->update.zoomFilterData.pertedec = 8;
                goomInfo->update.zoomFilterData.sqrtperte = 16;
                goomInfo->update.goomvar = 1;
                goomInfo->update.lockvar += 50;
                goomInfo->update.switchIncr = goomInfo->update.switchIncrAmount;
                goomInfo->update.switchMult = 1.0f;
            }
        }
        
        /*
         * gros frein si la musique est calme
         */
        if ((goomInfo->sound.speedvar < 0.01f)
            && (goomInfo->update.zoomFilterData.vitesse < STOP_SPEED - 4)
            && (goomInfo->cycle % 16 == 0)) {
            pzfd = &goomInfo->update.zoomFilterData;
            goomInfo->update.zoomFilterData.vitesse += 3;
            goomInfo->update.zoomFilterData.pertedec = 8;
            goomInfo->update.zoomFilterData.sqrtperte = 16;
            goomInfo->update.goomvar = 0;
        }
        
        /*
         * baisser regulierement la vitesse...
         */
        if ((goomInfo->cycle % 73 == 0) && (goomInfo->update.zoomFilterData.vitesse < STOP_SPEED - 5)) {
            pzfd = &goomInfo->update.zoomFilterData;
            goomInfo->update.zoomFilterData.vitesse++;
        }
        
        /*
         * arreter de decrémenter au bout d'un certain temps
         */
        if ((goomInfo->cycle % 101 == 0) && (goomInfo->update.zoomFilterData.pertedec == 7)) {
            pzfd = &goomInfo->update.zoomFilterData;
            goomInfo->update.zoomFilterData.pertedec = 8;
            goomInfo->update.zoomFilterData.sqrtperte = 16;
        }
        
        /*
         * Permet de forcer un effet.
         */
        if ((forceMode > 0) && (forceMode <= NB_FX)) {
            pzfd = &goomInfo->update.zoomFilterData;
            pzfd->mode = forceMode - 1;
        }
        
        if (forceMode == -1) {
            pzfd = NULL;
        }
        
        /*
         * Changement d'effet de zoom !
         */
        if (pzfd != NULL) {
            int        dif;
            
            goomInfo->update.cyclesSinceLastChange = 0;
            
            goomInfo->update.switchIncr = goomInfo->update.switchIncrAmount;
            
            dif = goomInfo->update.zoomFilterData.vitesse - goomInfo->update.previousZoomSpeed;
            if (dif < 0)
                dif = -dif;
            
            if (dif > 2) {
                goomInfo->update.switchIncr *= (dif + 2) / 2;
            }
            goomInfo->update.previousZoomSpeed = goomInfo->update.zoomFilterData.vitesse;
            goomInfo->update.switchMult = 1.0f;
            
            if (((goomInfo->sound.timeSinceLastGoom == 0)
                 && (goomInfo->sound.totalgoom < 2)) || (forceMode > 0)) {
                goomInfo->update.switchIncr = 0;
                goomInfo->update.switchMult = goomInfo->update.switchMultAmount;
            }
        }
        else {
            if (goomInfo->update.cyclesSinceLastChange > TIME_BTW_CHG) {
                pzfd = &goomInfo->update.zoomFilterData;
                goomInfo->update.cyclesSinceLastChange = 0;
            }
            else
                goomInfo->update.cyclesSinceLastChange++;
        }
        
#ifdef VERBOSE
        if (pzfd) {
            printf ("GOOM: pzfd->mode = %d\n", pzfd->mode);
        }
#endif
        
        /* Zoom here ! */