C++ (Cpp) size_to_mat3示例

示例#1

void init_mapping(TexMapping *texmap)
{
	float eul[3], smat[3][3], rmat[3][3], mat[3][3];
	
	size_to_mat3( smat,texmap->size);
	
	eul[0]= DEG2RADF(texmap->rot[0]);
	eul[1]= DEG2RADF(texmap->rot[1]);
	eul[2]= DEG2RADF(texmap->rot[2]);
	eul_to_mat3( rmat,eul);
	
	mul_m3_m3m3(mat, rmat, smat);
	
	copy_m4_m3(texmap->mat, mat);
	VECCOPY(texmap->mat[3], texmap->loc);

}

示例#2

void init_tex_mapping(TexMapping *texmap)
{
	float smat[3][3], rmat[3][3], mat[3][3], proj[3][3];

	if (texmap->projx == PROJ_X && texmap->projy == PROJ_Y && texmap->projz == PROJ_Z &&
	    is_zero_v3(texmap->loc) && is_zero_v3(texmap->rot) && is_one_v3(texmap->size))
	{
		unit_m4(texmap->mat);

		texmap->flag |= TEXMAP_UNIT_MATRIX;
	}
	else {
		/* axis projection */
		zero_m3(proj);

		if (texmap->projx != PROJ_N)
			proj[texmap->projx - 1][0] = 1.0f;
		if (texmap->projy != PROJ_N)
			proj[texmap->projy - 1][1] = 1.0f;
		if (texmap->projz != PROJ_N)
			proj[texmap->projz - 1][2] = 1.0f;

		/* scale */
		size_to_mat3(smat, texmap->size);
		
		/* rotation */
		/* TexMapping rotation are now in radians. */
		eul_to_mat3(rmat, texmap->rot);
		
		/* compose it all */
		mul_m3_m3m3(mat, rmat, smat);
		mul_m3_m3m3(mat, proj, mat);
		
		/* translation */
		copy_m4_m3(texmap->mat, mat);
		copy_v3_v3(texmap->mat[3], texmap->loc);

		texmap->flag &= ~TEXMAP_UNIT_MATRIX;
	}
}