Differential D1405 Diff 4661 source/blender/blenlib/intern/math_geom.c

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source/blender/blenlib/intern/math_geom.c

Show First 20 Lines • Show All 3,543 Lines • ▼ Show 20 Lines	void map_to_sphere(float r_u, float r_v, const float x, const float y, const float z)
}		}
else {		else {
r_v = r_u = 0.0f; /* to avoid un-initialized variables */		r_v = r_u = 0.0f; /* to avoid un-initialized variables */
}		}
}		}

/******************************* Normals ********************************/		/******************************* Normals ********************************/

		void accumulate_vertex_normals_tri(
		float n1[3], float n2[3], float n3[3],
		const float f_no[3],
		const float co1[3], const float co2[3], const float co3[3])
		{
		float vdiffs[3][3];
		const int nverts = 3;

		/* compute normalized edge vectors */
		sub_v3_v3v3(vdiffs[0], co2, co1);
		sub_v3_v3v3(vdiffs[1], co3, co2);
		sub_v3_v3v3(vdiffs[2], co1, co3);

		normalize_v3(vdiffs[0]);
		normalize_v3(vdiffs[1]);
		normalize_v3(vdiffs[2]);

		/* accumulate angle weighted face normal */
		{
		float *vn[] = {n1, n2, n3};
		const float *prev_edge = vdiffs[nverts - 1];
		int i;

		for (i = 0; i < nverts; i++) {
		const float *cur_edge = vdiffs[i];
		const float fac = saacos(-dot_v3v3(cur_edge, prev_edge));

		/* accumulate */
		madd_v3_v3fl(vn[i], f_no, fac);
		prev_edge = cur_edge;
		}
		}
		}

void accumulate_vertex_normals(		void accumulate_vertex_normals(
float n1[3], float n2[3], float n3[3], float n4[3],		float n1[3], float n2[3], float n3[3], float n4[3],
const float f_no[3],		const float f_no[3],
const float co1[3], const float co2[3], const float co3[3], const float co4[3])		const float co1[3], const float co2[3], const float co3[3], const float co4[3])
{		{
float vdiffs[4][3];		float vdiffs[4][3];
const int nverts = (n4 != NULL && co4 != NULL) ? 4 : 3;		const int nverts = (n4 != NULL && co4 != NULL) ? 4 : 3;

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