Differential D10171 Diff 36504 source/blender/blenkernel/intern/gpencil_geom.c

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	float vec1[3];	float vec1[3];
	float vec2[3];	float vec2[3];
		float vec3[3];

	/* initial vector (p0 -> p1) */	/* initial vector (p0 -> p1) */
	sub_v3_v3v3(vec1, &pt1->x, &pt0->x);	sub_v3_v3v3(vec1, &pt1->x, &pt0->x);
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	sub_v3_v3v3(vec2, &pt3->x, &pt0->x);	sub_v3_v3v3(vec2, &pt3->x, &pt0->x);

	/* vector orthogonal to polygon plane */	/* vector orthogonal to polygon plane */
	cross_v3_v3v3(r_normal, vec1, vec2);	cross_v3_v3v3(vec3, vec1, vec2);
		cross_v3_v3v3(r_normal, vec1, vec3);

	/* Normalize vector */	/* Normalize vector */
	normalize_v3(r_normal);	normalize_v3(r_normal);
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