forked from bartvdbraak/blender
use math functions for mesh subdivide smooth (easier to follow for bmesh, no functional changes).
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@ -1456,11 +1456,11 @@ void MESH_OT_delete(wmOperatorType *ot)
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/* calculates offset for co, based on fractal, sphere or smooth settings */
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static void alter_co(float *co, EditEdge *edge, float smooth, float fractal, int beauty, float perc)
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{
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float vec1[3], fac;
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float tvec[3], fac;
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if(beauty & B_SMOOTH) {
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/* we calculate an offset vector vec1[], to be added to *co */
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float len, fac, nor[3], nor1[3], nor2[3];
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/* we calculate an offset vector tvec[], to be added to *co */
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float len, nor[3], nor1[3], nor2[3];
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sub_v3_v3v3(nor, edge->v1->co, edge->v2->co);
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len= 0.5f*normalize_v3(nor);
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@ -1469,43 +1469,31 @@ static void alter_co(float *co, EditEdge *edge, float smooth, float fractal, int
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copy_v3_v3(nor2, edge->v2->no);
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/* cosine angle */
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fac= nor[0]*nor1[0] + nor[1]*nor1[1] + nor[2]*nor1[2] ;
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vec1[0]= fac*nor1[0];
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vec1[1]= fac*nor1[1];
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vec1[2]= fac*nor1[2];
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fac= dot_v3v3(nor, nor1);
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mul_v3_v3fl(tvec, nor1, fac);
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/* cosine angle */
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fac= -nor[0]*nor2[0] - nor[1]*nor2[1] - nor[2]*nor2[2] ;
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vec1[0]+= fac*nor2[0];
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vec1[1]+= fac*nor2[1];
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vec1[2]+= fac*nor2[2];
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fac= -dot_v3v3(nor, nor2);
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madd_v3_v3fl(tvec, nor2, fac);
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/* falloff for multi subdivide */
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smooth *= sqrtf(fabs(1.0f - 2.0f*fabsf(0.5f-perc)));
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vec1[0]*= smooth*len;
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vec1[1]*= smooth*len;
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vec1[2]*= smooth*len;
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mul_v3_fl(tvec, smooth * len);
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co[0] += vec1[0];
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co[1] += vec1[1];
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co[2] += vec1[2];
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add_v3_v3(co, tvec);
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}
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else if(beauty & B_SPHERE) { /* subdivide sphere */
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normalize_v3(co);
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co[0]*= smooth;
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co[1]*= smooth;
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co[2]*= smooth;
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mul_v3_fl(co, smooth);
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}
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if(beauty & B_FRACTAL) {
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fac= fractal*len_v3v3(edge->v1->co, edge->v2->co);
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vec1[0]= fac*(float)(0.5-BLI_drand());
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vec1[1]= fac*(float)(0.5-BLI_drand());
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vec1[2]= fac*(float)(0.5-BLI_drand());
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add_v3_v3(co, vec1);
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tvec[0]= fac*(float)(0.5-BLI_drand());
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tvec[1]= fac*(float)(0.5-BLI_drand());
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tvec[2]= fac*(float)(0.5-BLI_drand());
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add_v3_v3(co, tvec);
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}
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}
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@ -1517,9 +1505,7 @@ static EditVert *subdivide_edge_addvert(EditMesh *em, EditEdge *edge, float smoo
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EditVert *ev;
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float co[3];
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co[0] = (edge->v2->co[0]-edge->v1->co[0])*percent + edge->v1->co[0];
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co[1] = (edge->v2->co[1]-edge->v1->co[1])*percent + edge->v1->co[1];
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co[2] = (edge->v2->co[2]-edge->v1->co[2])*percent + edge->v1->co[2];
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interp_v3_v3v3(co, edge->v1->co, edge->v2->co, percent);
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/* offset for smooth or sphere or fractal */
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alter_co(co, edge, smooth, fractal, beauty, percent);
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@ -1543,9 +1529,7 @@ static EditVert *subdivide_edge_addvert(EditMesh *em, EditEdge *edge, float smoo
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EM_data_interp_from_verts(em, edge->v1, edge->v2, ev, percent);
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/* normal */
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ev->no[0] = (edge->v2->no[0]-edge->v1->no[0])*percent + edge->v1->no[0];
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ev->no[1] = (edge->v2->no[1]-edge->v1->no[1])*percent + edge->v1->no[1];
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ev->no[2] = (edge->v2->no[2]-edge->v1->no[2])*percent + edge->v1->no[2];
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interp_v3_v3v3(ev->no, edge->v1->no, edge->v2->no, percent);
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normalize_v3(ev->no);
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return ev;
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