Differential D2639 Diff 8674 source/blender/blenkernel/intern/armature.c

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source/blender/blenkernel/intern/armature.c

Show First 20 Lines • Show All 2,441 Lines • ▼ Show 20 Lines	while (rootchan->parent) {
segcount++;		segcount++;
if (segcount == data->chainlen) {		if (segcount == data->chainlen) {
break;		break;
}		}
rootchan = rootchan->parent;		rootchan = rootchan->parent;
}		}
return rootchan;		return rootchan;
}		}

		/************** CUSTOM FUNCTION **************/
		/*
		* Takes in an empty matrix and puts in the matrix with all the constraints
		* This matrix represents what the pose bone would be if it had no transformations.
		* @mat A matrix that will be passed by pointer that will hold the final matrix.
		* @posebone A bPoseChannel structure that is required for part of the calculation. This is passed by pointer.
		*/
		void BKE_pose_computing_pchan_rest(bPoseChannel *pchan, float mat[3][3])
		{
		bPoseChannel *parchan = pchan->parent;

		// Setting up matrices and vectors for final computation
		float chan_mat[4][4];
		const float size[3] = { 1.0f, 1.0f, 1.0f };
		const float rots[3] = { 0.0f, 0.0f, 0.0f };
		const float locs[3] = { 0.0f, 0.0f, 0.0f };
		float smat[3][3];
		float rmat[3][3];
		float tmat[3][3];
		float imat[3][3];
		float vec[3];
		float bone_length;

		/* get scaling matrix for pose bone */
		size_to_mat3(smat, size);

		/* get rotation matrix for pose bone*/
		eulO_to_mat3(rmat, rots, 6);

		/* Deriving pose bone chan_mat matrix - This is the matrix that represent the local/size/rot of the bone before deformers */
		mul_m3_m3m3(tmat, rmat, smat);
		copy_m4_m3(chan_mat, tmat);
		copy_v3_v3(chan_mat[3], locs);

		/* Deriving bone's bone_mat matrix - This rotation derived from head/tail/roll */
		float bone_mat[3][3];
		float offs_bone[4][4];
		float rotscale_mat[4][4];
		float loc_mat[4][4];
		sub_v3_v3v3(vec, pchan->bone->tail, pchan->bone->head);
		vec_roll_to_mat3(vec, pchan->bone->roll, bone_mat);


		/* Deriving pose_mat - constraints accumulate here. in the end, pose_mat = bone->arm_mat * chan_mat */
		copy_m4_m3(offs_bone, bone_mat);
		copy_v3_v3(offs_bone[3], pchan->bone->head);
		offs_bone[3][1] += pchan->bone->parent->length;
		mul_m4_m4m4(rotscale_mat, parchan->pose_mat, offs_bone);
		copy_m4_m4(loc_mat, rotscale_mat);
		float pose_mat[4][4];
		mul_m4_m4m4(pose_mat, rotscale_mat, chan_mat);
		mul_v3_m4v3(pose_mat[3], loc_mat, chan_mat[3]);

		// mat is the [pose_mat]3x3 submatrix
		copy_m3_m4(mat, pose_mat);
		}