forked from bartvdbraak/blender
Reenabled air drag force for cloth sim.
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e0b46b136e
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7896827f75
@ -502,19 +502,19 @@ static void cloth_calc_force(ClothModifierData *clmd, lVector &F, lMatrix &dFdX,
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Cloth *cloth = clmd->clothObject;
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unsigned int numverts = cloth->numverts;
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ClothVertex *verts = cloth->verts;
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float spring_air = clmd->sim_parms->Cvi * 0.01f; /* viscosity of air scaled in percent */
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float drag = clmd->sim_parms->Cvi * 0.01f; /* viscosity of air scaled in percent */
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float gravity[3] = {0,0,0};
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// lVector diagonal(3*numverts);
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// diagonal.setZero
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TripletList coeff_dFdX, coeff_dFdV;
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F.setZero();
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dFdX.setZero();
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dFdV.setZero();
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/* set dFdV jacobi matrix diagonal entries to -spring_air */
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// dFdV.setIdentity();
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// initdiag_bfmatrix(dFdV, tm2);
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/* air drag */
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lMatrix_reserve_elems(dFdV, 1);
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for (int i = 0; i < numverts; ++i) {
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madd_v3_v3fl(lVector_v3(F, i), lVector_v3(V, i), -drag);
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lMatrix_madd_m3(dFdV, I, -drag, i, i);
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}
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/* global acceleration (gravitation) */
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if (clmd->scene->physics_settings.flag & PHYS_GLOBAL_GRAVITY) {
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