Coding (sexadecimal)	The font description explanation
Coding (sexadecimal)	The font description explanation	000	Definition finishes
001	Start to write	000	Definition finishes
001	Start to write	002	Start writing
003	Remove vector length with next byte	002	Start writing
003	Remove vector length with next byte	004	Take advantage of vector length with next byte
005	Current location is pressed into storehouse	004	Take advantage of vector length with next byte
005	Current location is pressed into storehouse	006	From storehouse, eject current location
007	Nurbs curve	006	From storehouse, eject current location
007	Nurbs curve	008	The X-Y relative displacement that provides by following two bytes
009	Finish a plurality of X-Y relative displacements by (0,0)	008
009	Finish a plurality of X-Y relative displacements by (0,0)	00A	Octant arc by following two bytes definition
00B	Segment by following five bytes definition	00A	Octant arc by following two bytes definition
00B	Segment by following five bytes definition	00C	Arc according to X-Y displacement and convexity definition
00D	The arc of a plurality of appointment convexitys	00C	Arc according to X-Y displacement and convexity definition

00E	Empty
00E	Empty	00F	Empty

Embodiment 2 character library optimized Algorithm

This character library is described the database file that membrane inside the rush stalk record is formed by font attribute in essence, and the user can revise and optimization being defined as of font attribute at any time.Certainly, after attribute definition was revised, the graphics process branched program also will be made corresponding modification.The method of simplifying, optimizing is a lot.Wherein increasing nurbs curve (non-uniform rational B-spline) attribute is that this patent aims at the font attribute that super-huge Chinese character is set up.The handling procedure of this attribute is as follows: 1, when the increment of coordinate of a stroke during greater than specified value, enter this program.2, at first by nurbs curve of former discrete data point definition.

P (u) = Σ_{i = 0}^{n} P_{i} R_{1,3 (u)},

Wherein

R_{i, 3 (u)} = \frac{W_{i} N_{i, 3 (u)}}{Σ_{j = 0}^{n} W_{j} N_{j, . 3 (u)}}

R_{I, 3 (u)}---3 rational basis functions; P_i---feature polygon reference mark; W_i---the weight factor at reference mark.3, according to the stroke needs on-line setup W of special big character_iParameter.

W_i=0 o'clock, the position, reference mark there was not influence, W to font_iIncrease, local line segment will be to P_iApproaching, W_iDuring → ∞, what be pulled names a person for a particular job and P_iOverlap.Revise the local shape of stroke easily by weight factor.Nurbs curve more can be represented free curve accurately than general Bezier.

On adjusted nurbs curve, make linear interpolation, remake linear interpolation output.

Modification 1. translation algorithms of embodiment 3 word strings:

If any point P in the track (X, Y), translation Δ X is P ' (X ', Y ') behind the Δ Y, then:

X′＝X+ΔX

；

Y′＝Y+ΔY

Use translation algorithm, realize the alignment function of each print object.2. rotation algorithm:

With reference to the accompanying drawings 2, the definition screen object lower left corner is O (X_Min, Y_Max), arbitrary coordinate points P in the track (X, phasing degree Y) is θ, rotates coordinate points behind the given corner Δ θ and be P ' (X ', Y '), then: (1) radius of turn R and phasing degree θ are:

θ = \arctan \frac{Y_{\max} - Y}{X - X_{\min}};

R = \sqrt{{(X - X_{\min})}^{2} + {(Y_{\max} - Y)}^{2}}

(2) rotation back angle θ '=θ+Δ θ; (3) coordinate of rotation back P ' (X ', Y ') is:

X′＝X_min+Rcosθ′

Y '=Y_Max+ Rsin θ ' is the arch algorithm 3.:

With reference to the accompanying drawings 3, the point coordinate after four angular coordinates, arch transformation parameter and the arch conversion of definition arch object.

(1) establishes arch centre coordinate O (X₀, Y₀), arch initial angle θ₁, end angle θ₂, R₁, R₂Be screen after the arch

The radius up and down of object, R₃Be middle footpath (being arch radius) that the pass between them is:

Can get R₁, R₂, R₃

(2) (θ is R) (with O (X for any 1 P ' in the word vector path₀, Y₀) be the utmost point heart), according to angle than=wide

Degree ratio, radius ratio=aspect ratio have relational expression:

Can get antipode coordinate R, θ after the arch;

(3) (θ R) is converted into (X with O polar coordinates to be put P '₀, Y₀) be true origin rectangular coordinate point P ' (X, Y):

X＝Rcosθ

Y＝Rsinθ

(4), finally try to achieve coordinate P ' after the arch (X ', Y ') by translation algorithm

X′＝X₀+X＝X₀+Rcosθ

Y '=Y₀+ Y=Y₀+ Rsin θ 4. interpolator arithmetics: with reference to the accompanying drawings 4, definition screen lower left corner coordinate points is O (X_Min, Y_Max), arbitrary coordinate points P in the track (X, Y), the convergent-divergent multiple is K, then: the polar angle that (1) P is ordered is:

θ = \arctan \frac{Y_{\max} - Y}{X - X_{\min}}

The utmost point directly is:

R = \sqrt{{(X - X_{\min})}^{2} + {(Y_{\max} - Y)}^{2}};

(2) amplify the back to P ' (X ', Y ') point,

P ' polar angle is: θ, the utmost point directly are R₁=KR; (3) rectangular coordinate that amplifies back literal vector path P ' (X ', Y ') point is:

X′＝X_min+R₁cosθ

Y′＝Y_max+R₁sinθ

Claims

1. the generation method of industrial marking machine single line body character library under the Windows environment is characterized in that:

1) the font file conversion of the skeleton literal that exists with binary format that contains in the large-scale professional softwares such as CAD is become the glyph definition file of text formatting, its technical characterictic is a structure of analyzing binary file, font attribute is converted into the basic descriptor and the private code descriptor of text formatting;

2) adaptability that the glyph definition file to need at mark to be done is simplified and optimization process, remove use in the mark machine less than font attribute, to improve print speed, increase nurbs curve and describe attribute, to improve print quality;

3) the shape defined file after optimizing and simplifying is changed into the font data library file, database table is made up of two fields: literal code and descriptor string;

4) software interface of complete this character library of use of design.

2. the acquisition methods of industrial marking machine character library outline letters mark track data under the Windows environment:

1) uses the CreateFontIndirect function, create logical font by the attribute of appointment;

2) start a path branches with the BeginPath function;

3) with Line, Circle, Arc, Rectangle function representation current path;

4) stop path definition with the EndPath function: