JPH0451870B2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Technical Field of the Invention The present invention relates to a method for converting figures, and in particular, a method for converting a two-dimensional coordinate point series input using a two-dimensional coordinate input device according to the type of conversion. It relates to a method of calculating parameters and performing graphical transformation.

(b) Prior art and problems Conventionally, in the figure conversion method using a figure conversion device,
For example, as shown in FIG. 1, after the information input to the conversion device 3 by pressing the keys 2 arranged on the keyboard 1 is processed by the computer CPU,
The figure had been converted by the conversion device 3.

For example, when converting and re-editing a figure, there are various ways to move the target drawing horizontally, or to move it up and add it in between. Enter the conversion parameters on keyboard 1 according to the type of conversion. .

For example, for "movement", the amount of movement in the X and Y directions, for "rotation", the rotation angle, and for "enlargement"
At the time, the magnification rate was entered numerically.

However, in this method, the parameters to be input (amount of movement, angle of rotation, magnification) are replaced with numerical values and input using a numeric keypad, or the cursor keys are operated by the amount of movement. At this time, the numbers to be entered differ depending on the conversion type, such as the number of inputs and the number of digits for the movement amount ΔX and ΔY for movement, the rotation angle Δθ for rotation, and the enlargement ratio ΔX and ΔY for enlargement. The drawback was that input errors were likely to occur.

(c) Object of the Invention The object of the present invention is to provide a method of specifying transformation parameters common to various types of transformation by inputting a sequence of coordinate points from a two-dimensional coordinate input device.

(d) Structure of the Invention According to the present invention, the present invention has a processing device having a memory, a vector calculation circuit, a calculation circuit for movement amount, rotation angle, expansion/contraction ratio, etc., and a conversion device, and a coordinate input device, and a coordinate input device. Among vector figures drawn on the device that indicate the transformation direction and amount of transformation of the transformation target figure, each coordinate point sequence information of the transformation target figure is stored in the memory of the processing device, and the information of the vector figure is stored in the vector The calculation circuit detects and calculates the start point and end point of the vector, and the calculation results are used to calculate the amount of movement, rotation angle, expansion/contraction rate, etc. in response to the conversion type signal (movement, rotation, etc.) that is input separately. This is achieved by a figure conversion method characterized in that a figure to be converted is converted by a converter using the calculation result and coordinate point sequence information stored in a memory.

(e) Examples of the invention The present invention will be explained in detail below with reference to the drawings.

The present invention utilizes the two-dimensional nature of a coordinate point series input with a two-dimensional coordinate input device such as a digitizer, tablet, etc., and calculates figure transformation parameters such as movement, rotation, and expansion/contraction from the coordinate point series. This is what I did.

FIG. 2 shows a two-dimensional coordinate input device 4. The device 4 is equipped with a pen 5, and when the pen 5 is traced on a board surface (for example, a tablet) 6, the coordinate points are continuously stored in the memory of the processing device. Input is stored.

For example, when converting a figure drawn on the tablet 6 by moving it or performing an editing operation such as reduction, in the present invention, the coordinate point sequence of the figure to be converted drawn on the tablet is read and the processing device reads it. It is input and stored in memory, and the direction and amount of transformation of the figure is realized by drawing the corresponding vector on the tablet.

Figure 3 A shows the figure to be converted on Tablet 6.
This shows an example of a coordinate point sequence for DX and DY movement. Here, the coordinate point sequence is {(x ₁ , y ₁ ), (x ₂ ,
y ₂ ),...(x _o , y _o )}. In this case, the vector from the starting point to the ending point is indicated by a, which indicates movement by (X _o -X ₁ ) and (Y _o -Y ₁ ) in the direction of vector a. That is, the direction and amount of movement is indicated by vector a, and the movement as a conversion type is separately given as a conversion type signal, and by this combination, conversion parameters are calculated and graphic conversion is performed. The steps for calculating conversion parameters in the case of movement, rotation, and expansion/contraction are shown below.

(1) Move, move the figure in DX and DY parallel.

DX=x _o −x ₁ DY=y _o −y ₁ (2) Rotation: Rotate the figure by θ.

θ＝tan ^-1 (y _o −y ₁ /x _o −x ₁ ) (3) Stretching Figure 3 (b) shows the relationship between original figure A and stretchable figure B. It's shrinking. Looking at the vector a, the x direction is a + conversion, and the y walk is a - conversion. Let the width W and height H of the original figure A at that time be γ _x ,
γ _y expands and contracts. When γ _x and γ _y are smaller than 1, it is defined as reduction.

_{y _ _ _ _ _} FIG. 3 is a block circuit diagram.

In the figure, 4 is a two-dimensional coordinate input device, the others are circuits provided in the processing device, and the memory is not shown, but 8 is a parameter calculation device, a vector calculation circuit 9, a movement amount calculation circuit 10, and a rotation angle It consists of a calculation circuit 11 and an expansion/contraction ratio calculation circuit 12. 13 is a conversion device.

First, a diagram to be converted is drawn on the two-dimensional coordinate input device, and the information on each coordinate point sequence is outputted and input into the memory of the processing unit (CPU) as original information.
Then, a vector indicating the transformation direction and transformation amount of the figure to be transformed is drawn, and its coordinate point sequence (xi, yi) is determined by the vector calculation circuit 9 as the starting point,
Only the end point is detected and the vector V=(x _o −x ₁ , y _o
−y ₁ ) is calculated.

The movement amount calculation circuit 1 corresponds to the movement, rotation, and expansion/contraction indicated by the conversion type signal K input separately.
0, the rotation angle calculation circuit 11 and the expansion/contraction rate calculation circuit 12 calculate the amount of movement, the rotation angle, and the expansion/contraction rate, respectively.
Calculated parameters (ΔXΔY, Δθ, γ _x , γ _y )
Graphical transformation is executed by the transformation device 13 using each coordinate point sequence information of the transformation target graphic as the original information from Momeri.

For example, move K=1, rotate K=2, K=3
As a switch that expands and contracts, draw a figure to be converted and a figure indicating the conversion direction and amount of the figure to be converted on the coordinate input device with a pen, and select K = 1, 2, or 3 depending on the type of conversion of the figure to be converted. If you specify , the converted figure will be output from the converter.

In the present invention, the input parameters for figure transformation can be simply by drawing a vector on the input coordinates of the coordinate input device with a pen, and there is no need to enter numerical values such as movement amount, rotation angle, expansion/contraction rate, etc. from the keyboard as in the past. Since there are no keys, errors and complications in key operations can be prevented, and the input burden can be reduced.

(f) Effects of the Invention As explained above in detail, in the figure conversion method of the present invention, a figure to be converted is drawn on a two-dimensional coordinate input device, and a figure to be converted is drawn on a two-dimensional coordinate input device, and a figure to be converted is drawn on the coordinate input device in order to specify conversion parameters common to the type of conversion. Since it is sufficient to simply draw a vector indicating the direction of transformation and the amount of transformation, the burden of parameter input is greatly reduced, unlike conventional keyboard input.

[Brief explanation of the drawing]

Fig. 1 is a block diagram for explaining a conventional figure conversion device, Fig. 2 is a block diagram showing a two-dimensional coordinate input device used in the present invention, and Fig. 3 A and B are calculations of conversion parameters of the present invention. FIG. 4 is a plan view for explaining the procedure, and a block diagram showing one embodiment of the graphic conversion method of the present invention. In the figure, 4 is a two-dimensional coordinate input device, 5 is a pen, 6 is a board (tablet), 8 is a parameter calculation device, 9 is a vector calculation circuit, 10 is a movement amount calculation circuit, 11 is a rotation angle calculation circuit, and 12 is a The expansion/contraction rate calculation circuit, 13 is a conversion device.

Claims (1)

[Claims] 1 Equipped with a processing device having a memory, a vector calculation circuit, a calculation circuit for movement amount, rotation angle, expansion/contraction ratio, etc., and a conversion device, and a coordinate input device, and capable of converting a figure to be converted and a figure to be converted drawn on the coordinate input device. Among the vector figures that indicate the direction and amount of conversion, information on each coordinate point sequence of the figure to be converted is stored in the memory of the processing unit, and the information on the vector figure is used to detect and calculate the vector start point and end point in the vector calculation circuit. , this calculation result is calculated by the calculation circuit to calculate the amount of movement,
A figure conversion method characterized in that a rotation angle, an expansion/contraction rate, etc. are calculated, and a conversion device performs figure conversion of a figure to be converted based on the calculation results and coordinate point sequence information from a memory.