static DerivedMesh *applyModifier(ModifierData *md, Object *ob, DerivedMesh *derivedData, ModifierApplyFlag UNUSED(flag)) { DerivedMesh *dm = derivedData, *result; ParticleInstanceModifierData *pimd = (ParticleInstanceModifierData *) md; ParticleSimulationData sim; ParticleSystem *psys = NULL; ParticleData *pa = NULL; MPoly *mpoly, *orig_mpoly; MLoop *mloop, *orig_mloop; MVert *mvert, *orig_mvert; int totvert, totpoly, totloop /* , totedge */; int maxvert, maxpoly, maxloop, totpart = 0, first_particle = 0; int k, p, p_skip; short track = ob->trackflag % 3, trackneg, axis = pimd->axis; float max_co = 0.0, min_co = 0.0, temp_co[3]; float *size = NULL; trackneg = ((ob->trackflag > 2) ? 1 : 0); if (pimd->ob == ob) { pimd->ob = NULL; return derivedData; } if (pimd->ob) { psys = BLI_findlink(&pimd->ob->particlesystem, pimd->psys - 1); if (psys == NULL || psys->totpart == 0) return derivedData; } else { return derivedData; } if (pimd->flag & eParticleInstanceFlag_Parents) totpart += psys->totpart; if (pimd->flag & eParticleInstanceFlag_Children) { if (totpart == 0) first_particle = psys->totpart; totpart += psys->totchild; } if (totpart == 0) return derivedData; sim.scene = md->scene; sim.ob = pimd->ob; sim.psys = psys; sim.psmd = psys_get_modifier(pimd->ob, psys); if (pimd->flag & eParticleInstanceFlag_UseSize) { float *si; si = size = MEM_callocN(totpart * sizeof(float), "particle size array"); if (pimd->flag & eParticleInstanceFlag_Parents) { for (p = 0, pa = psys->particles; p < psys->totpart; p++, pa++, si++) *si = pa->size; } if (pimd->flag & eParticleInstanceFlag_Children) { ChildParticle *cpa = psys->child; for (p = 0; p < psys->totchild; p++, cpa++, si++) { *si = psys_get_child_size(psys, cpa, 0.0f, NULL); } } } totvert = dm->getNumVerts(dm); totpoly = dm->getNumPolys(dm); totloop = dm->getNumLoops(dm); /* totedge = dm->getNumEdges(dm); */ /* UNUSED */ /* count particles */ maxvert = 0; maxpoly = 0; maxloop = 0; for (p = 0; p < totpart; p++) { if (particle_skip(pimd, psys, p)) continue; maxvert += totvert; maxpoly += totpoly; maxloop += totloop; } psys->lattice_deform_data = psys_create_lattice_deform_data(&sim); if (psys->flag & (PSYS_HAIR_DONE | PSYS_KEYED) || psys->pointcache->flag & PTCACHE_BAKED) { float min[3], max[3]; INIT_MINMAX(min, max); dm->getMinMax(dm, min, max); min_co = min[track]; max_co = max[track]; } result = CDDM_from_template(dm, maxvert, 0, 0, maxloop, maxpoly); mvert = result->getVertArray(result); orig_mvert = dm->getVertArray(dm); mpoly = result->getPolyArray(result); orig_mpoly = dm->getPolyArray(dm); mloop = result->getLoopArray(result); orig_mloop = dm->getLoopArray(dm); for (p = 0, p_skip = 0; p < totpart; p++) { float prev_dir[3]; float frame[4]; /* frame orientation quaternion */ /* skip particle? */ if (particle_skip(pimd, psys, p)) continue; /* set vertices coordinates */ for (k = 0; k < totvert; k++) { ParticleKey state; MVert *inMV; MVert *mv = mvert + p_skip * totvert + k; inMV = orig_mvert + k; DM_copy_vert_data(dm, result, k, p_skip * totvert + k, 1); *mv = *inMV; /*change orientation based on object trackflag*/ copy_v3_v3(temp_co, mv->co); mv->co[axis] = temp_co[track]; mv->co[(axis + 1) % 3] = temp_co[(track + 1) % 3]; mv->co[(axis + 2) % 3] = temp_co[(track + 2) % 3]; /* get particle state */ if ((psys->flag & (PSYS_HAIR_DONE | PSYS_KEYED) || psys->pointcache->flag & PTCACHE_BAKED) && (pimd->flag & eParticleInstanceFlag_Path)) { float ran = 0.0f; if (pimd->random_position != 0.0f) { ran = pimd->random_position * BLI_hash_frand(psys->seed + p); } if (pimd->flag & eParticleInstanceFlag_KeepShape) { state.time = pimd->position * (1.0f - ran); } else { state.time = (mv->co[axis] - min_co) / (max_co - min_co) * pimd->position * (1.0f - ran); if (trackneg) state.time = 1.0f - state.time; mv->co[axis] = 0.0; } psys_get_particle_on_path(&sim, first_particle + p, &state, 1); normalize_v3(state.vel); /* Incrementally Rotating Frame (Bishop Frame) */ if (k == 0) { float hairmat[4][4]; float mat[3][3]; if (first_particle + p < psys->totpart) pa = psys->particles + first_particle + p; else { ChildParticle *cpa = psys->child + (p - psys->totpart); pa = psys->particles + cpa->parent; } psys_mat_hair_to_global(sim.ob, sim.psmd->dm, sim.psys->part->from, pa, hairmat); copy_m3_m4(mat, hairmat); /* to quaternion */ mat3_to_quat(frame, mat); /* note: direction is same as normal vector currently, * but best to keep this separate so the frame can be * rotated later if necessary */ copy_v3_v3(prev_dir, state.vel); } else { float rot[4]; /* incrementally rotate along bend direction */ rotation_between_vecs_to_quat(rot, prev_dir, state.vel); mul_qt_qtqt(frame, rot, frame); copy_v3_v3(prev_dir, state.vel); } copy_qt_qt(state.rot, frame); #if 0 /* Absolute Frame (Frenet Frame) */ if (state.vel[axis] < -0.9999f || state.vel[axis] > 0.9999f) { unit_qt(state.rot); } else { float cross[3]; float temp[3] = {0.0f, 0.0f, 0.0f}; temp[axis] = 1.0f; cross_v3_v3v3(cross, temp, state.vel); /* state.vel[axis] is the only component surviving from a dot product with the axis */ axis_angle_to_quat(state.rot, cross, saacos(state.vel[axis])); } #endif } else { state.time = -1.0; psys_get_particle_state(&sim, first_particle + p, &state, 1); } mul_qt_v3(state.rot, mv->co); if (pimd->flag & eParticleInstanceFlag_UseSize) mul_v3_fl(mv->co, size[p]); add_v3_v3(mv->co, state.co); } /* create polys and loops */ for (k = 0; k < totpoly; k++) { MPoly *inMP = orig_mpoly + k; MPoly *mp = mpoly + p_skip * totpoly + k; DM_copy_poly_data(dm, result, k, p_skip * totpoly + k, 1); *mp = *inMP; mp->loopstart += p_skip * totloop; { MLoop *inML = orig_mloop + inMP->loopstart; MLoop *ml = mloop + mp->loopstart; int j = mp->totloop; DM_copy_loop_data(dm, result, inMP->loopstart, mp->loopstart, j); for (; j; j--, ml++, inML++) { ml->v = inML->v + (p_skip * totvert); } } } p_skip++; } CDDM_calc_edges(result); if (psys->lattice_deform_data) { end_latt_deform(psys->lattice_deform_data); psys->lattice_deform_data = NULL; } if (size) MEM_freeN(size); result->dirty |= DM_DIRTY_NORMALS; return result; }
/* axis is using another define!!! */ static int calc_curve_deform(Scene *scene, Object *par, float co[3], const short axis, CurveDeform *cd, float quat_r[4]) { Curve *cu = par->data; float fac, loc[4], dir[3], new_quat[4], radius; short index; const int is_neg_axis = (axis > 2); /* to be sure, mostly after file load */ if (cu->path == NULL) { BKE_displist_make_curveTypes(scene, par, 0); if (cu->path == NULL) return 0; // happens on append... } /* options */ if (is_neg_axis) { index = axis - 3; if (cu->flag & CU_STRETCH) fac = (-co[index] - cd->dmax[index]) / (cd->dmax[index] - cd->dmin[index]); else fac = -(co[index] - cd->dmax[index]) / (cu->path->totdist); } else { index = axis; if (cu->flag & CU_STRETCH) fac = (co[index] - cd->dmin[index]) / (cd->dmax[index] - cd->dmin[index]); else fac = +(co[index] - cd->dmin[index]) / (cu->path->totdist); } if (where_on_path_deform(par, fac, loc, dir, new_quat, &radius)) { /* returns OK */ float quat[4], cent[3]; if (cd->no_rot_axis) { /* set by caller */ /* this is not exactly the same as 2.4x, since the axis is having rotation removed rather than * changing the axis before calculating the tilt but serves much the same purpose */ float dir_flat[3] = {0, 0, 0}, q[4]; copy_v3_v3(dir_flat, dir); dir_flat[cd->no_rot_axis - 1] = 0.0f; normalize_v3(dir); normalize_v3(dir_flat); rotation_between_vecs_to_quat(q, dir, dir_flat); /* Could this be done faster? */ mul_qt_qtqt(new_quat, q, new_quat); } /* Logic for 'cent' orientation * * * The way 'co' is copied to 'cent' may seem to have no meaning, but it does. * * Use a curve modifier to stretch a cube out, color each side RGB, positive side light, negative dark. * view with X up (default), from the angle that you can see 3 faces RGB colors (light), anti-clockwise * Notice X,Y,Z Up all have light colors and each ordered CCW. * * Now for Neg Up XYZ, the colors are all dark, and ordered clockwise - Campbell * * note: moved functions into quat_apply_track/vec_apply_track * */ copy_qt_qt(quat, new_quat); copy_v3_v3(cent, co); /* zero the axis which is not used, * the big block of text above now applies to these 3 lines */ quat_apply_track(quat, axis, (axis == 0 || axis == 2) ? 1 : 0); /* up flag is a dummy, set so no rotation is done */ vec_apply_track(cent, axis); cent[index] = 0.0f; /* scale if enabled */ if (cu->flag & CU_PATH_RADIUS) mul_v3_fl(cent, radius); /* local rotation */ normalize_qt(quat); mul_qt_v3(quat, cent); /* translation */ add_v3_v3v3(co, cent, loc); if (quat_r) copy_qt_qt(quat_r, quat); return 1; } return 0; }
/* axis is using another define!!! */ static int calc_curve_deform(Scene *scene, Object *par, float *co, short axis, CurveDeform *cd, float *quatp) { Curve *cu= par->data; float fac, loc[4], dir[3], new_quat[4], radius; short /*upflag, */ index; index= axis-1; if(index>2) index -= 3; /* negative */ /* to be sure, mostly after file load */ if(cu->path==NULL) { makeDispListCurveTypes(scene, par, 0); if(cu->path==NULL) return 0; // happens on append... } /* options */ if(ELEM3(axis, OB_NEGX+1, OB_NEGY+1, OB_NEGZ+1)) { /* OB_NEG# 0-5, MOD_CURVE_POS# 1-6 */ if(cu->flag & CU_STRETCH) fac= (-co[index]-cd->dmax[index])/(cd->dmax[index] - cd->dmin[index]); else fac= (cd->dloc[index])/(cu->path->totdist) - (co[index]-cd->dmax[index])/(cu->path->totdist); } else { if(cu->flag & CU_STRETCH) fac= (co[index]-cd->dmin[index])/(cd->dmax[index] - cd->dmin[index]); else fac= (cd->dloc[index])/(cu->path->totdist) + (co[index]-cd->dmin[index])/(cu->path->totdist); } #if 0 // XXX old animation system /* we want the ipo to work on the default 100 frame range, because there's no actual time involved in path position */ // huh? by WHY!!!!???? - Aligorith if(cu->ipo) { fac*= 100.0f; if(calc_ipo_spec(cu->ipo, CU_SPEED, &fac)==0) fac/= 100.0; } #endif // XXX old animation system if( where_on_path_deform(par, fac, loc, dir, new_quat, &radius)) { /* returns OK */ float quat[4], cent[3]; #if 0 // XXX - 2.4x Z-Up, Now use bevel tilt. if(cd->no_rot_axis) /* set by caller */ dir[cd->no_rot_axis-1]= 0.0f; /* -1 for compatibility with old track defines */ vec_to_quat( quat,dir, axis-1, upflag); /* the tilt */ if(loc[3]!=0.0) { normalize_v3(dir); q[0]= (float)cos(0.5*loc[3]); fac= (float)sin(0.5*loc[3]); q[1]= -fac*dir[0]; q[2]= -fac*dir[1]; q[3]= -fac*dir[2]; mul_qt_qtqt(quat, q, quat); } #endif if(cd->no_rot_axis) { /* set by caller */ /* this is not exactly the same as 2.4x, since the axis is having rotation removed rather than * changing the axis before calculating the tilt but serves much the same purpose */ float dir_flat[3]={0,0,0}, q[4]; copy_v3_v3(dir_flat, dir); dir_flat[cd->no_rot_axis-1]= 0.0f; normalize_v3(dir); normalize_v3(dir_flat); rotation_between_vecs_to_quat(q, dir, dir_flat); /* Could this be done faster? */ mul_qt_qtqt(new_quat, q, new_quat); } /* Logic for 'cent' orientation * * * The way 'co' is copied to 'cent' may seem to have no meaning, but it does. * * Use a curve modifier to stretch a cube out, color each side RGB, positive side light, negative dark. * view with X up (default), from the angle that you can see 3 faces RGB colors (light), anti-clockwise * Notice X,Y,Z Up all have light colors and each ordered CCW. * * Now for Neg Up XYZ, the colors are all dark, and ordered clockwise - Campbell * * note: moved functions into quat_apply_track/vec_apply_track * */ copy_qt_qt(quat, new_quat); copy_v3_v3(cent, co); /* zero the axis which is not used, * the big block of text above now applies to these 3 lines */ quat_apply_track(quat, axis-1, (axis==1 || axis==3) ? 1:0); /* up flag is a dummy, set so no rotation is done */ vec_apply_track(cent, axis-1); cent[axis < 4 ? axis-1 : axis-4]= 0.0f; /* scale if enabled */ if(cu->flag & CU_PATH_RADIUS) mul_v3_fl(cent, radius); /* local rotation */ normalize_qt(quat); mul_qt_v3(quat, cent); /* translation */ add_v3_v3v3(co, cent, loc); if(quatp) copy_qt_qt(quatp, quat); return 1; } return 0; }