JP2012073857A - Image processing program and image processor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image processing program and image processor capable of drawing a movement track of an input point using a pointing device on a screen at a higher speed.SOLUTION: A game device (an image processor) 1 includes: virtual space creation means 30b for creating a three-dimensional virtual game space 51; input position acquisition means 30c for acquiring position information of an input point P using a touch pen 17 on a first display 6; and track line drawing means 30d for drawing a track line T indicating a movement route R in the virtual game space 51 when the input point P moves on a screen. The game device can change a line type of the track line T according to a movement speed of the input point P.

Description

  The present invention relates to an image processing program and an image processing apparatus for drawing a movement locus of an input point on a screen by a pointing device in a virtual three-dimensional space displayed on the screen.

  Conventionally, in a game apparatus including a tablet (or touch panel) and a pointing device such as a stylus, a movement locus of an input point on the tablet or touch panel by the stylus is not drawn in a simple solid line but according to an input operation. Some of them draw with different line types. For example, in the case of Patent Document 1, the thickness of the locus is changed based on the pressing force when inputting with a stylus to the tablet. Also, the coordinates of the input points by the stylus at predetermined time intervals are detected, and the density of the locus is adjusted according to the distance between the adjacent input points.

  In the case of Patent Document 2, the thickness of the trajectory and the degree of twist are changed according to the moving speed of the input point of the touch panel by the stylus. Specifically, the thickness of the locus is changed by changing the size of the drawing pattern for drawing the locus according to the moving speed of the input point. Also, among the dots constituting the drawing pattern, the color information set for some of the dots positioned along the horizontal or vertical direction is set to the same color as the background color or a similar color according to the moving speed of the input point. I am doing so.

Japanese Patent No. 3865681 Japanese Patent No. 4119436

  By the way, there are various stylus operations by the player, and the input point may be moved at a relatively high speed. Therefore, it is preferable that the trajectory can be drawn more quickly. However, since both of Patent Documents 1 and 2 described above process the two-dimensional bitmap image itself according to the pressing force or moving speed and draw using the processed image, try to draw at a higher speed. As a result, the processing load on the computing unit of the computer becomes relatively large. In addition, such a trend has become more prominent with the recent improvement in screen resolution of display devices.

  In addition to the above drawing speed, Patent Documents 1 and 2 have the following problems. That is, in the case of Patent Document 1, since it is necessary to detect a pressing force by a stylus in order to change the thickness of the locus, there is a problem that the invention is limited to a device including a pressure sensor. Further, in the case of Patent Document 2, there is a problem that the degree of drowning can be expressed only by a trajectory in the horizontal or vertical direction, and a sufficient degree of drowning cannot be represented by a trajectory in an oblique direction.

  SUMMARY An advantage of some aspects of the invention is that it provides an image processing program and an image processing apparatus capable of drawing a moving locus of an input point on a screen by a pointing device at high speed. Also provided are an image processing program and an image processing apparatus that can change the thickness (width dimension) of a trajectory without the need for a pressure sensor and can express the degree of drowning regardless of the direction of the trajectory. The purpose is to do.

  An image processing program according to the present invention includes a computer, a virtual space generation unit that generates a virtual three-dimensional space displayed on a screen of a display unit, and an input position that acquires position information of an input point on the screen by a pointing device An acquisition unit and a locus line drawing unit that draws a locus line indicating the movement path in the three-dimensional space based on the position information of the input point on the movement path when the input point moves on the screen. The trajectory line drawing means changes the line type of the trajectory line according to the moving speed of the input point.

  The locus line drawing means is configured to change at least one of a width dimension, a pattern, and a color of the locus line according to a moving speed of the input point as a line type of the locus line. It may be.

  The trajectory line drawing means forms the trajectory line with a polygon in the three-dimensional space, and sets the position of the vertex that forms the polygon according to the moving speed of the input point. You may be comprised so that the width dimension of a line may be changed.

  The locus line drawing means may be configured to relatively reduce the width dimension of the locus line when the moving speed of the input point is relatively large.

  The trajectory line drawing means forms the trajectory line as a polygon in the three-dimensional space, and changes an at least one of a pattern and a color according to the moving speed of the input point. The texture which is the selected partial image may be pasted on the polygon to change at least one of the pattern and color of the locus line.

  Further, the image includes an intermediate region in which a high lightness color portion and a low lightness color portion are mixed in a mottled manner, a high lightness region in which the density of the high lightness color portion is relatively high, and the low lightness color. And a low-lightness area having a relatively high density, and the locus line drawing means has the low-lightness area when the moving speed of the input point is relatively high. When the texture is selected so as to include a wider area, and the moving speed of the input point is relatively small, the texture may be selected so as to include the high brightness area more widely.

  An image processing apparatus according to the present invention is an image processing apparatus including a program storage unit that records any one of the image processing programs described above and a computer that executes a game program stored in the program storage unit. .

  ADVANTAGE OF THE INVENTION According to this invention, the image processing program and image processing apparatus which can draw the movement locus | trajectory of the input point on the screen by a pointing device at higher speed can be provided.

It is a front view which shows the external appearance structure of the game device which concerns on embodiment of this invention. It is a schematic diagram explaining a pointing device. It is a block diagram which shows the internal structure of a game device. It is a block diagram which shows the functional structure of a control part. It is a schematic diagram for demonstrating a virtual game space. It is a flowchart which shows operation | movement of a locus line drawing process. It is a schematic diagram for demonstrating the setting procedure of the line type of a locus line. It is a schematic diagram for demonstrating the setting procedure of the line type of a locus line. It is a schematic diagram which illustrates the image image from which the texture stuck on a polygon is selected. It is a mimetic diagram showing an example of a locus line drawn in virtual game space by locus line drawing processing.

  Hereinafter, an image processing program and an image processing apparatus according to embodiments of the present invention will be described with reference to the drawings. In the following, a game device is exemplified as the image processing device, but the present invention can also be applied to an image processing device other than the game device. Further, as an example of a game to be played on this game apparatus, an adventure game in which a player operates a player character and advances the game while solving a battle with an enemy character and solving a mystery will be described as an example. In this game, a special effect can be activated in the game when the player performs a linear input using a touch pen on the touch panel provided in the game apparatus. However, the present invention is not limited to application to this kind of game, and can be applied to other games including action games and role-playing games.

[Hardware configuration]
FIG. 1 is a front view showing an external configuration of game device 1 according to the embodiment of the present invention. As shown in FIG. 1, the game apparatus 1 is portable and includes a lower main body 2 having a horizontally long and thin rectangular parallelepiped shape and an upper main body 3 having a similar rectangular parallelepiped shape. A hinge 4 is installed between the upper side portion of the lower main body 2 and the lower side portion of the upper main body 3, and the lower main body 2 and the upper main body 3 are relative to each other around a horizontal axis passing through the hinge 4. Can be rotated. Therefore, it can be closed so that the front surface of the lower body 2 and the front surface of the upper body 3 face each other, or can be opened from that state to the state shown in FIG.

  The device provided in each of the main bodies 2 and 3 will be outlined. First, a rectangular first display (screen of the display section) 6 constituted by, for example, a transflective color liquid crystal display is provided at the center of the front surface of the lower main body 2. Is provided. On the left side of the first display 6, a power button 7 and a cross key 8 are arranged up and down, and on the right side are an operation button 9 including two buttons and four buttons A, B, X, and Y. And an operation button 10 including the upper and lower buttons. In addition, an indicator lamp 11 indicating a power on / off state is provided below the operation button 10. Further, an L button 12 is disposed at the upper left corner of the lower body 2 and an R button 13 is disposed at the upper right corner. On the other hand, a rectangular second display 15 made of, for example, a transflective color liquid crystal display is provided at the center of the front surface of the upper body 3, and speakers 16 are provided on the left and right sides thereof.

  Although not shown in FIG. 1, a game program (image) according to the present embodiment is provided on the upper side portion of the lower main body 2 and on the rear side portion of the upper main body 3 when the game apparatus 1 is opened. A media interface (see the media interface 44 in FIG. 3) is provided that can insert and remove the game media 50 in which the processing program 50a and the like are recorded. The device provided in the lower main body 2 and the device provided in the upper main body 3 are electrically connected via a multi-conductor band-shaped cable 5 provided in the vicinity of the hinge 4.

  In addition, the game apparatus 1 includes a pointing device 20. Specifically, a transparent touch panel 14 is provided on the surface of the first display 6 provided in the lower main body 2, and the pointing device 20 is configured by this and the touch pen 17 attached to the game apparatus 1. Has been. The touch panel 14 has a horizontally long rectangular shape having substantially the same shape and dimensions as the entire screen (display surface) of the first display 6, and the player operates the touch pen 17 as is well known. When the tip touches the surface of the touch panel 14, position information (coordinates) of the contact point (input point) is output to a CPU (see CPU 31 in FIG. 3) described later.

  More specifically, as shown in FIG. 2, the touch panel 14 is set with a uv coordinate system having a u-axis extending upward and a v-axis extending rightward with the lower left corner as the origin, Coordinates (u, v) corresponding to the positions of the dots on one display 6 are defined. Further, the touch panel 14 is provided with a sensor, and when an input operation for bringing the pen tip of the touch pen 17 into contact with the touch panel 14 is performed, information indicating coordinates (u, v) corresponding to the input point (contact point) P is performed. (Position information) is acquired by the sensor and is output to the CPU 31.

  FIG. 3 is a block diagram showing an internal configuration of the game apparatus 1. As shown here, the game apparatus 1 includes a control unit 30, which includes a CPU 31, a drawing processor 32, an audio processor 33, an input signal processor 34, a RAM (Random Access Memory) 35, And a ROM (Read Only Memory) 36. Furthermore, the game apparatus 1 also includes a VRAM (Video-RAM) 40, a D / A (Digital-Analog) converter 41, the first display 6 and the second display 15, the amplifier 42, the speaker 16, and the touch panel. 14, an operation unit 43 (including the power button 7, the cross key 8, the operation buttons 9 and 10, the L button 12 and the R button 13), a media interface 44, and a bus 45. Among these components, the CPU 31, the drawing processor 32, the audio processor 33, the input signal processor 34, the RAM 35, the ROM 36, the operation unit 43, and the media interface 44 are connected to each other via a bus 45 so that data can be transmitted between them. .

  Of these, the operation unit 43 is an operation unit including the cross key 8, the operation buttons 9, 10, the L button 12, and the R button 13 shown in FIG. An operation signal corresponding to the presence / absence) is input to the CPU 31. The operation unit 43 also includes a power button 7 in addition to the operation element. When the power button 7 is operated, power is supplied to each unit and the game apparatus 1 is activated to operate each operation element. The input is valid.

  The media interface 44 accesses the game media 50, which is a recording medium connected from the outside of the game apparatus 1, and reads the game program 50a and the game data 50b stored therein. The game program 50a is a program for executing an action game to be played on the game apparatus 1, and the game data 50b is data necessary for executing the game. For example, each character or background image data, This includes image data for displaying information such as status, sound data such as sound effects and BGM, message data using characters and symbols, and the like. The game media 50 may employ a semiconductor memory, UMD (Universal Media Disc) (registered trademark), which is a kind of optical disc, or the like.

  In the RAM 35, a load area for storing the game program 50a and the game data 50b read from the game media 50 according to the progress of the game, and a work area for use when the CPU 31 processes the game program 50a are set. Has been. The ROM 36 stores basic programs for operating the game apparatus 1, such as a program for controlling the reading process of the game program 50 a and the game data 50 b stored in the game media 50.

  When the player performs an input operation for bringing the pen tip of the touch pen 17 into contact with the touch panel 14, the input signal processing unit 34 sets the input point (contact point) P to the coordinates (u, v) on the touch panel 14. Based on this, position information of the input point P is detected, and a signal indicating the position information is output to the CPU 31. The position information of the input point P is detected at a predetermined sampling period (for example, 4 times in 1/60 second), and a signal indicating the position information detected at each time is sequentially output to the CPU 31. It has become.

  The CPU 31 reads all or part of the game program 50a and the game data 50b recorded in the game media 50 into the RAM 35 through the media interface 44, and executes them according to the operation input to the touch panel 14 or the operation unit 43 by the player. And control the game progress. More specifically, when a signal is input from the touch panel 14 or the operation unit 43 when operated by the player, the CPU 31 performs a predetermined game progress process corresponding to the operation signal in accordance with the game program 50a, and the process The result is displayed on the first display 6 or the second display 15 as an image indicating the game progress (hereinafter also referred to as “game image”), and an audio signal indicating the game progress (hereinafter also referred to as “game sound”). Output to the speaker 16.

  Drawing of the game image is performed by the drawing processor 32 in accordance with an instruction from the CPU 31. That is, the CPU 31 determines the content of the game image to be displayed on the first display 6 or the second display 15 based on the signal input from the touch panel 14 or the operation unit 43, and displays necessary drawing data for the content. The drawing processor 32 is generated. The drawing processor 32 further generates a game image based on the generated drawing data, and writes this game image in the VRAM 40. The D / A converter 41 sequentially converts the game images output from the VRAM 40 into analog signals, and outputs (displays) them to the first display 6 or the second display 15.

  Further, the CPU 31 determines sound effects such as sound effects and BGM to be output from the speaker 16 in accordance with the progress of the game, reads out sound data for generating the sound from the RAM 35, and inputs the sound data to the sound processor 32. . That is, when a sound generation event occurs with the progress of the game, the CPU 31 reads out sound data corresponding to the sound generation event (sound data loaded from the game media 50) from the RAM 35 and inputs the sound data to the sound processor 32. The audio processor 32 is configured by a DSP (Digital Signal Processor), and after giving a predetermined effect (for example, reverb, chorus, etc.) to the audio data input by the CPU 31, it is converted into an analog signal, Output to the amplifier 42. The amplifier 42 amplifies the audio signal input from the audio processor 32 and then outputs it to the speaker 16.

[Functional configuration of control unit]
FIG. 4 is a block diagram illustrating a functional configuration of the control unit 30 included in the game apparatus 1. The control unit 30 of the game apparatus 1 executes the game program 50a and the game data 50b read from the game media 50, so that the game progress control unit 30a, the virtual space generation unit 30b, the input position acquisition unit 30c, and the trajectory line drawing The function of the means 30d is exhibited.

  Among these, the game progress control means 30a advances this game according to the operation of the touch panel 14 or the operation unit 43 by the player, and controls the actions of the player character C (see FIG. 5) and the enemy character. . The virtual space generation means 30b generates a virtual game space 51 (see FIG. 5) that is a virtual three-dimensional space in which a player character operated by a player and an enemy character act.

  FIG. 5 is a schematic diagram for explaining the virtual game space 51. As shown in FIG. 5, the virtual game space 51 is set as, for example, a space on a flat ground, but may include an underwater or air space. The player character C acts in accordance with the player's operation in such a virtual game space 51. A virtual viewpoint 52 that forms a virtual camera is set in the virtual game space 51, and a game image when the virtual game space 51 is photographed from the virtual viewpoint 52 is displayed on the first display 6 or the second display 15. Is displayed.

  That is, as shown in FIG. 5, a virtual viewpoint 52 is set at a predetermined position in the virtual game space 51 in which the player character C exists, and the virtual viewpoint 52 moves as appropriate according to the progress of the game. However, the player character C is directed to be included in the image. Further, a screen 53 having a similar shape to the touch panel 14 is set at a predetermined position between the virtual viewpoint 52 and the player character C. Then, a three-dimensional virtual game space 51 photographed from the virtual viewpoint 52 is perspective-projected on the screen 53 to obtain a two-dimensional image.

  Similarly to the touch panel 14, the screen 53 is set with a uv coordinate system having a u-axis extending upward and a v-axis extending rightward with the lower left corner as an origin. Coordinates (u, v) corresponding to are defined. Therefore, the two-dimensional image projected on the screen 53 is directly used as a game image to be displayed on the first display 6 or the second display 15. FIG. 5 shows a state in which a game image generated from a two-dimensional image projected on the screen 53 is displayed on the first display 6. For convenience of explanation, the following description assumes that the game image is displayed on the first display 6, but it is of course possible to display the game image on the second display 15.

  On the other hand, the input position acquisition means 30c shown in FIG. 4 performs input based on the coordinates (u, v) of the input point P when an input is made at an arbitrary point on the touch panel 14 by the operation of the touch pen 17 by the player. The position information of the point P is acquired. In addition, when the player performs an input operation so that the surface of the touch panel 14 is traced with the pen tip of the touch pen 17, the trajectory line drawing unit 30d performs the movement based on the position information of each input point P on the movement path of the pen tip. A trajectory line representing the route is generated in the virtual game space 51, and the trajectory line is drawn on the first display 6 or the like.

  More specifically, when there is an input operation for bringing the tip of the touch pen 17 into contact with the touch panel 14, the coordinates (u, v) on the touch panel 14 are detected for the input point P. Here, as described above, since uv coordinate systems corresponding to each other are set on both the touch panel 14 and the screen 53, the screen is based on the coordinates (u, v) of the input point P on the touch panel 14. On 53, the coordinates (u, v) corresponding to the input point P can be acquired.

  Further, as shown in FIG. 5, a three-dimensional xyz coordinate system is set in the virtual game space 51 in addition to the uv coordinate system of the screen 53, and an arbitrary position in the virtual game space 51 is represented by coordinates (x , Y, z). Then, the coordinates (u, v) corresponding to the input point P on the screen 53 acquired as described above are converted into three-dimensional coordinates (x, y, z) by the input position acquisition means 30c of the control unit 30. Is done. In this way, the position information of the input point P on the touch panel 14 is acquired as coordinates (x, y, z) indicating the three-dimensional position information in the virtual game space 51.

  Here, when the touch pen 17 is operated so that the surface of the touch panel 14 is traced with the pen tip, the input point P on the touch panel 14 by the pen tip moves. The input position acquisition means 30c of the control unit 30 converts the coordinates (u, v) of each input point P on the movement path into coordinates (x, y, z) as described above, and converts the three-dimensional position information. get. The trajectory line drawing means 30d generates a trajectory line T representing the movement path R of the pen tip on the touch panel 14 in the three-dimensional virtual game space 51 based on the three-dimensional position information. Are drawn on the first display 6 or the like.

  By the way, the trajectory line drawing means 30d of this game changes the line type of the trajectory line T according to the moving speed of the input point P when drawing the trajectory line T as described above. Hereinafter, the details of the trajectory line drawing process including the process of changing the line type of the trajectory line T, which is executed by the trajectory line drawing unit 30d, will be described.

[Track line drawing processing]
FIG. 6 is a flowchart showing the operation of the locus line drawing process executed by the locus line drawing means 30d. 7 and 8 are schematic diagrams for explaining the procedure for setting the line type of the trajectory line T in the trajectory line drawing process. Of these, FIG. 7 shows a case where there are two input points. 8 indicates a case where there are three input points. 6 to 8, the input points P are displayed with suffixes N-2, N-1, N, etc., and the suffixes indicate the relative detection order of the input points P. Is shown. For example, the input points P _N−2 , P _N−1 , and P _N indicate that they are detected in this order.

  The trajectory line drawing process shown in FIG. 6 is executed for each frame. When the pen tip of the touch pen 17 comes into contact with the touch panel 14, the pen tip is then released (hereinafter referred to as “line input operation period”). The locus line T is drawn by this locus line drawing process. In the following, a case where the locus line T is drawn like a brush will be described as an example.

As shown in FIG. 6, in the locus line drawing process, when a new input point _PN is acquired (step S1), it is determined whether or not the input point _PN-1 acquired immediately before is present. (Step S2). That is, when the pen tip of the touch pen 17 is not in contact with the touch panel 14 for the first time or when the pen tip is already in contact, the pen tip is moved to a position different from the previous input point _PN-1. If there is a pen tip, “new input point P _N ” is acquired (step S1). This input point P _N is the input position information acquisition unit 30c, converts the position information indicating the coordinates (u, v) on the touch panel 14 three-dimensional coordinates in the virtual game space 51 (x, y, z) and It has been done.

Next, when the previous input point P _N-1 does not exist (step S2: NO), that is, when the pen tip of the touch pen 17 is not in contact with the touch panel 14 for the first time, the process proceeds to step S1. A new input point _PN is set as the start point of the locus line T (step S3). On the other hand, when the previous input point P _N-1 exists (step S2: YES), that is, the pen tip is moved while the pen tip is already in contact with the touch panel 14, and the previous input point P _N is reached. If there is a pen tip at a position different from the _-1, determines whether the second preceding the input point P _N-2 is present to the input point P _N (step S4). If the input point _PN-2 does not exist, the processes of steps S5 to S7 are executed.

In addition, when the pen tip is moved while the pen tip of the touch pen 17 is already in contact with the touch panel 14, the contact point of the destination pen tip is determined only when the moving distance is equal to or greater than a predetermined threshold. it may be obtained as a new input point P _N. That is, the input position information acquiring unit 30c is sequentially acquires position information indicating the three-dimensional coordinates of the input point P _N at a predetermined cycle, and inputs it to the image processor 32. The image processor 32 compares the position information with the position information input in the past. Only when the distance between the three-dimensional coordinates indicated by the position information is equal to or greater than a predetermined threshold, the image processor 32 determines that the position information is newly input. Such input point _PN may be a formal input point, and when it is less than the threshold value, the newly input position information may be discarded. Thereby, when the moving distance of the pen tip is very short, drawing of a locus line representing the moving path of the pen tip during that time can be omitted.

The processing of steps S5 to S7 will be described with reference to FIG. First, in a state where the input point P _N-2 does not exist (step S4: NO), only two input points P _N-1 and P _N exist, and the previous input point P _N-1 is: The starting point of the locus line T is already set by executing steps S1 to S3. Therefore, the state where the input point _PN-2 does not exist (step S4: NO) means that the pen point moves from the input point _{PN-1 as} the start point as shown in step 100 of FIG. In this state, a new input point _PN is detected. In this case, as shown in Step 101, the xyz coordinates of the two vertices a and b for forming the polygon are set in the vicinity of the previous input point _PN-1 , and the vertices a and b and the end point are set. A triangular polygon A ₁ defined by the input point P _N is generated (step S5 in FIG. 6).

More specifically, it has a predetermined length L that is orthogonal to the line segment connecting the input points P _N and P _N-1 (that is, the movement route R) and has the input point P _N-1 as an intermediate point. Vertices a and b are set at both end positions of the line segment Lab. Then, in addition to the vertices a and b, the input point _PN is set as one vertex, and a polygon A ₁ defined by the coordinates of these three vertices is generated (step S5). Then, as described below, a texture is selected from a predetermined image (step S6). Thereafter, as shown in step 102 of FIG. 7, pasting a texture selected in step S6 on the generated surface of the polygon A ₁ in step S5 (step S7).

  This texture is acquired as a partial image selected from previously prepared image images. FIG. 9A is a schematic view illustrating this image image, and is particularly used for drawing the locus line T in a brush-like style. FIG. 9B is a diagram for explaining step S6 for selecting a texture from this image image, and FIG. 9C is a diagram for explaining step S11 described later for selecting a texture from the same image image. It is a drawing.

  The image shown in FIG. 9A is a square image having, for example, 64 pixels in each of the vertical and horizontal directions. The upper left corner is the origin 0, the horizontal s-axis (0 <s <63), and the vertical direction. The t-axis (0 <t <63) is set. The image is an image having a change in the pattern. Specifically, the density of the intermediate region 62 where the portion of the high lightness color (for example, black) and the portion of the low lightness color (for example, white) are mottled and the density of the low lightness color portion are relatively large ( That is, it includes a low brightness area 61 that is generally whitish and a high brightness area 63 in which the density of the high brightness color portion is relatively large (that is, it is generally blackish).

  More specifically, the low lightness area 61 is an image in which most of the whole is white and a black spot pattern is partially formed. On the contrary, the high brightness region 63 is an image in which most of the whole is black and a white spot pattern is partially formed. The intermediate region 62 is an image in which a substantially striped pattern is formed as a whole by a white belt-like pattern extending along the s-axis direction and a black belt-like pattern.

  Among these, the intermediate region 62 is formed in a vertically long rectangular shape over the entire t-axis direction in the vicinity of the approximate center of the image image in the s-axis direction. The low brightness area 61 is formed in a vertically long rectangular shape in the area closer to the origin in the s-axis direction than the intermediate area 62, and the high brightness area 63 is opposite to the low brightness area 61 with respect to the intermediate area 62. In the side region, it is formed in a vertically long rectangular shape. In other words, the image is divided into three regions on the left side, the center, and the right side by two line segments along the t-axis direction. The low lightness region 61 and the intermediate region described above correspond to each of them. 62 and a high brightness area 63 are set.

In the process of step S6 described above, as shown in FIG. 9B, the coordinates (in the lower right corner) of the vertices a and b set corresponding to the input point _PN-1 that is the starting point of the locus line T are shown. The point (pixel) 60a at s = 63, t = 63) is associated with the vertex a, and the point 60b at the coordinates (s = 63, t = 0) at the upper right corner of the image is associated with the vertex b. Further, the input point _{P N,} the predetermined coordinates of the low intensity regions within the _{61 (s = s N, t} = t N) of the point 60P _N is associated. Then, the vertex a, the points 60a associated with b and the input point _{P N,} 60b, texture-like triangle formed by connecting the 60P _N a (partial image enclosed by thick lines in FIG. 9 (b)), An image is selected from the images (step S6). Next, as shown in step 102 of FIG. 7, the vertices a, b and the surface of the polygon _{A 1} defined by the input point _{P N,} pasting a texture selected in step S6 (step S7). As a result, the trajectory line T representing the movement path R of the input point P is drawn in the three-dimensional virtual game space 51. Although not necessarily coincide with the surface shape and texture of the shape of the polygon A _1, it may be subjected appropriately known interpolation processing if they do not match.

Thus, if the input point is only two points P _N-1, P _N, even nib of the touch pen 17 is released from the touch panel 14 at an input point P _N is assumed termination point, triangle for texture as described above can be affixed with respect to the polygon a _1, while moving in the horizontal direction with respect to the paper surface a brush, locus line similar to typeface when went away from the paper slowly brush tip T Can be drawn. Incidentally, such line indicating the contour of lines and polygons A ₁ showing the travel path R shown in steps 100 to 102 in FIG. 7 need not be actually drawn, shown in step 102 when detecting an input point P _N The locus line T may be drawn by directly pasting the texture. The same applies to the case where the trajectory line T is drawn through steps 103 to 106 in FIG.

Next, in step S4 of FIG. 6, if the input point _{P N-2} of the two previous to the input point _{P N} is determined to exist (Step S4: YES) will be described with reference also to FIG 8 . The presence of the two previous input points P _N-2 means that there are at least three input points P. Here, the minimum three input points P _N-2 and P _{N− are present. 1} and _PN are described. Also, just prior to detecting the two input points _{P N-2, P N-1} in addition to new input point _{P N,} in a state where only two input points _{P N-2, P N-1} is present Yes, this is the same as the state in which only the input points P _N-1 and P _N exist as shown in FIG. Thus, a result of detection of new input point P from the state shown in step 102 of FIG. 7, FIG. 8, the input point P _N of the input point _P, the input point P _N of the preceding input points (Figure 7 ) As an input point P _N-1 , and the previous input point (input point P _{N-1 in} FIG. 7) as an input point P _N-2 . That is, FIG. 8 shows the subsequent steps when a new input point P is detected from the state shown in step 102 of FIG.

As shown in step 103 of FIG. 8, by detecting the input point P _N to the next input point P _N-1, the input point P _N-2 before the two exists for said input force point P _N If it is determined (step S4: YES), in the vicinity of the input point _{P N-1,} based on the moving speed between the input point _{P N-2, P N-} 1, 2 vertex c, sets the xyz coordinates of d ( Step S8). This moving speed is obtained by dividing the distance from the input point P _N-2 to the input point P _N-1 by the period for detecting the input point P. If the period is constant, the input point P _N-2 is simply obtained. The xyz coordinates of the two vertices c and d can also be set based on the distance (movement distance) from _N-2 to the input point _PN-1 .

Vertex c, when instructions for configuring the d More specifically, as shown in step 104 of FIG. 8, assuming the line segment connecting the input point P _N-2 and the input point P _N, perpendicular to line segment In addition, a line segment Lcd having the input point P _N-1 as an intermediate point is assumed. Further, the length of the line segment Lcd is equal to the input point P _N−2 , P with respect to the length L used when setting the vertices a and b corresponding to the start points described in Step 101 of FIG. It is set to a length kL multiplied by a coefficient k determined based on the moving speed between _N-1 . Vertices c and d are set at both end positions of the line segment Lcd assumed in this way so as to sandwich the movement route R (step S8). Here, the coefficient k described above is set to be approximately inversely proportional to the moving speed between the input points P _N−2 and P _N−1 , for example, within a range of 7 dots to 17 dots. Is larger, the coefficient k becomes smaller and the length kL of the line segment Lcd (that is, the distance between the vertices c and d) becomes shorter. Further, if the moving speed is low, the coefficient k increases, and the length kL of the line segment Lcd increases. The relationship between the coefficient k and the moving speed does not have to be linear, and may be nonlinear or discrete as long as the coefficient k decreases as the moving speed increases.

Next, change to a triangular polygon defined by the input point P _N-1 and the vertices a and b (polygons generated when the input points are only two points P _N-2 and P _N-1 ). Thus, two new triangular polygons are generated between the input points P _N-2 and P _N-1 (step S9). That is, as shown in step 105 of FIG. 8, a polygon A ₂ defined by vertices a, b, and c and a polygon A ₃ defined by vertices b, c, and d are generated. Further, as in step S5, the polygon _{A 4} and end point of the input point _{P N,} i.e., vertex c, and generates a triangular polygons _{A 4} defined by d and the input point _{P N} (step S10) .

Subsequently, based on the moving speed between the input points P _N−2 and P _N−1 , textures to be pasted on the polygons A ₂ , A ₃ , and A ₄ are selected from the image in FIG. S11). More specifically, in the present embodiment, the movement path R is sandwiched in correspondence with the input points P on the movement path R excluding the start point and the end point (for example, the input point P _{N-1 in} FIG. 8). In the pair of vertices (for example, vertices c and d in FIG. 8), the t-coordinate of a point (pixel) associated with the image image when selecting a texture is fixed, and one vertex (for example, , Vertex c) is t = 63, and the other vertex (for example, vertex d) is t = 0.

In the image, the s-coordinates of the points associated with the pair of vertices are determined based on the moving speed between the input points P _N-2 and P _N-1 within a predetermined range. As shown in FIG. 9A, s = s _F and s _L which are predetermined s coordinates are set in the image. Then, the s coordinate of the point corresponding to the pair of vertices approaches s _F because the moving speed between the input points P _N−2 and P _N−1 increases within the range of s = s _{F to} s _L , The same value is set so as to approach s _L as the moving speed decreases. More specifically, an upper limit value (fastest speed) and a lower limit value (slowest speed) are set in advance for the moving speed of the input point P, and the actual moving speed of the input point P is greater than or equal to this upper limit value. and s = _{s F} when, in the case of less than the lower limit value is set to s = _{s L.} When the moving speed is a value between the upper limit value and the lower limit value, the s coordinate between s _F and s _L is obtained by linear interpolation. In the present embodiment, s _F is the s coordinate included in the intermediate region 62 and s _L is the s coordinate included in the high brightness region 63, but is not limited to this, and between s = s _F and s _L May be set so that at least a part of the intermediate region 62 is included.

This will be explained by applying to the vertices c and d in step 105 in FIG. 8. The vertex c is associated with a point 60 c of coordinates (s _F ≦ s ≦ s _L , t = 63) in the image, and the vertex d Is associated with a point 60d having coordinates (s _F ≦ s ≦ s _L , t = 0). The s coordinates of the points 60c and 60d are set to the same value within the range of s _F ≦ s ≦ s _L based on the moving speed between the input points P _N−2 and P _N−1 . On the other hand, the coordinates of a point 60P _N on the images corresponding to the input point _{P N} is the same as the coordinates of 60P points corresponding to the input point _{P N} shown in step 102 of FIG. 7 _N (see FIG. 9 (b)) is there.

In this way, the vertices defining polygons _{A 2, A 3, A 4} a, b, c, corresponding to the d and the input point _{P N,} the point 60a on the images, 60b, 60c, 60d, the 60P _N decide. Then, the polygon _{A 2,} select the triangular texture formed points 60a, 60b, by connecting the 60c (step S11), and paste this (step S12). Further, with respect to the polygon _{A 3,} select the triangular texture formed point 60b, 60c, by connecting 60d (step S11), and paste this (step S12). Further, with respect to the polygon _{A 4,} select the point 60c, 60d, a triangular texture formed by connecting the 60P _N (step S11), and paste this (step S12). In the present embodiment, actually, a quadrangular texture formed by connecting the points 60a, 60b, 60d, and 60c in order to the polygons A ₂ and A ₃ is pasted. Is substantially the same as the case where the triangular textures individually corresponding to the polygons A ₂ and A ₃ are pasted as described above.

As described above, by pasting the corresponding texture to each of A ₂ , A ₃ , and A ₄ , the trajectory line T that represents the movement trajectory R of the input point P is generated in the three-dimensional virtual game space 51. (See step 106 in FIG. 8). In this case as well, the surface shapes of the polygons A ₂ , A ₃ , A ₄ and the texture shapes corresponding to them do not necessarily match, but if they do not match, a known interpolation process may be appropriately performed. Further, in the above description, the case where there are three input points P is taken as an example. Similarly, when four or more input points P are detected, Step S1 (YES), Step S2 (YES), Step S4 (YES) ), The processes of steps S8 to S12 are performed.

For example, when the fourth input point P is detected, the xyz coordinates of the vertices e and f corresponding to the third input point P (input point P _{N in} FIG. 8) are used as the moving speed of the immediately preceding input point. A setting is made based on (the moving speed between the second and third input points) (step S8). Next, instead of the polygon (polygon A _{4 in} FIG. 8) defined by the vertices c and d and the third input point P (input point P _{N in} FIG. 8), the polygon is defined by vertices c, d, and e. And a polygon defined by the vertices d, e, and f (step S9), and further a polygon defined by the vertices e, f and the fourth input point P is generated (step S10). . Further, the points 60e and 60f to be associated with the vertices e and f in the image are determined in the same manner as the points 60c and 60d with respect to the vertices c and d, thereby selecting a texture corresponding to each polygon (step) S11). Then, by pasting each selected texture to each corresponding polygon (step S12), a trajectory line T representing a movement trajectory R when there are four input points P is displayed in the three-dimensional virtual game space 51. Can be drawn. As can be seen from the above, the locus line T can be drawn by the same procedure when the fifth or more input points P are detected.

  As can be seen from the above description, the coordinates of the vertices defining the polygon are set according to the moving speed of the input point P, and the distance between the pair of vertices across the moving locus R is the moving speed of the input point P. The larger (faster), the smaller (between vertices). For this reason, when the player moves the pen tip of the touch pen 17 quickly while keeping the pen tip in contact with the touch panel 14, the width dimension of the generated polygon (the dimension in the direction orthogonal to the movement locus R) becomes smaller, and the locus of finer lines. A line T can be drawn. On the other hand, when the pen tip is moved slowly, the width dimension of the generated polygon is increased, and a thick locus line T can be drawn. Further, since the width of the trajectory line T is determined according to the moving speed between the input points, the trajectory line T becomes thicker or thinner in the middle depending on the moving speed of the pen tip. Or Therefore, when the brush is moved slowly with respect to the paper surface, the brush tip spreads to become a thick line, and when the brush is moved quickly, the trace line T resembles a brush-like typeface where the brush tip is gathered into a thin line. Can be drawn.

  Further, as described with reference to FIG. 9, as the moving speed of the input point P increases, the point associated with the vertex defining the polygon has a smaller s-coordinate and only a few black spot patterns exist. It becomes a point on the side closer to the low brightness area 61 that is not. And the texture demarcated using such a point has few black patterns, and becomes relatively low brightness. Therefore, by pasting this texture on the corresponding polygon, it is possible to express a sharp font when the brush is moved quickly with respect to the paper surface. Further, the s coordinate of the point associated with the vertex defining the polygon is determined based on the moving speed regardless of the moving direction of the input point P. Therefore, even if the pen tip of the touch pen 17 is moved in any of the front, rear, left, and diagonal directions, or even when the movement direction is changed halfway, the same typeface is drawn. The locus line T to be expressed can be drawn.

FIG. 10 is a schematic diagram illustrating an example of a curved locus line T drawn in the virtual game space 51 by the locus line drawing process described above. FIG. 10 illustrates a case where there are 70 input points P so that the trajectory line T drawn by the trajectory line drawing process according to the present embodiment is more easily understood. That is, as a result of moving the touch pen 17, 70 input points P _{1 to} P ₇₀ are detected along the movement path R, and the last input point P ₇₀ is a terminal point. In FIG. 10, only some of the input points P are displayed, and in order to improve the visibility, the input points P to be displayed are not drawn as “points” but pass through the input points P and are trace lines. The approximate position of each input point P is indicated by a line segment substantially orthogonal to T.

The movement of the pen tip when drawing the locus line T will be described. The movement speed is relatively constant between the input points P _{1 to} P ₁₀ , but it is decelerated after that and the input point P ₂₀ is decelerated. is between to P ₄₀ have become relatively slow substantially constant speed. In addition, after becoming faster temporarily past the input point P _40, slows down again from the input point P _50, the input point P ₆₀ and later gradually increase the speed has led to the input point P ₇₀ of the termination point. The nib is separated from the touch panel 14 at the input point P _70.

In this case, the trajectory line T is a thin line that has a relatively large amount of blurring between the input points P _{1 to} P ₁₀ where the pen tip moving speed is relatively fast (the proportion of the low-light color dots is relatively large). . The between next input point P ₁₀ to P ₂₀ to the pen tip movement is slow, the line width becomes thick line increases as the distance from the input point P _20, is drawn as blur it goes low, followed by the input Between the points P _{20 to} P ₄₀ , the line is drawn with a line in which a thick line and a state with little blur are maintained. Furthermore, between the input point P ₄₀ to P _50, fading is increased with become thin line according to the movement of the pen tip is increased, conversely between the next input point P ₅₀ to P _60, the movement of the pen tip is slow As the line gets thicker, drowning decreases. The input points P _{60 to} P ₇₀ are gradually drawn as a thin line, and the amount of curling increases, and the input point P ₇₀ at the end point is drawn to be tapered.

  In this way, by using the image shown in FIG. 9 and executing the locus line drawing process according to the procedure shown in the flowchart of FIG. 6, lines such as the thickness of the line and the degree of twisting according to the moving speed of the input point P are obtained. The seeds can be sequentially changed, and a trajectory line T similar to a brush-style typeface can be drawn in the three-dimensional virtual game space 51.

  Note that the image image that can be used in the locus line drawing processing according to the present embodiment is not limited to an image image having a change in pattern (that is, having a different pattern) as shown in FIG. For example, an image image having a change in color may be used, and a gradation image in which the color changes from red to blue as it goes from the coordinate s = 0 to the coordinate s = 63 may be adopted. In this case, the locus line T whose color changes according to the moving speed of the pen tip of the touch pen 17 can be drawn. Furthermore, you may employ | adopt the image image which has a change in both a pattern and a color.

  Further, in the present embodiment, an example of changing both the thickness of the trajectory line T and the degree of curling according to the moving speed of the input point P is illustrated, but among the line width (line thickness) and the degree of curling, Only one of them may be changed. Further, only one or two of the line width, the pattern (including the blurring condition), and the color may be changed, or all may be changed. Also, as shown in FIG. 9, instead of changing the t-coordinate of the point on the image image and changing the s-coordinate according to the moving speed of the input point P, the s-coordinate is fixed and the t-coordinate is changed. You may make it make it. 9 illustrates the image divided into three areas of the low brightness area 61, the intermediate area 62, and the high brightness area 63. However, the image is not limited to this. For example, the low brightness area 61 and the high brightness area 2 You may use what was divided into the area | regions.

  In the present embodiment, the locus line T is drawn at a position on the screen 53 in the virtual game space 51. However, the present invention is not limited to this. Good. For example, the drawing may be performed at an intermediate position between the screen 53 and the player character C in the virtual game space 51. Furthermore, although the touch panel 14 and the touch pen 17 were illustrated as the pointing device 20, it is not restricted to this. For example, a pointing device according to the present invention also includes a mouse that is operated by the player to indicate the operation of the cursor displayed on the screen.

  The present invention can provide an image processing program and an image processing apparatus that can draw a moving locus of an input point on a screen by a pointing device at higher speed.

1 Game device (image processing device)
6 First display (screen of display unit)
14 Touch panel 17 Touch pen 20 Pointing device 30 Control unit 30a Game progress control means 30b Virtual space generation means 30c Input position acquisition means 30d Trajectory line drawing means 50a Game program (image processing program)
51 Virtual Game Space A ₁ , A ₂ , A ₃ , A ₄ Polygon P Input Point R Movement Path T Trajectory Line

Claims (7)

Computer
Virtual space generation means for generating a virtual three-dimensional space displayed on the screen of the display unit;
Input position acquisition means for acquiring position information of the input point on the screen by a pointing device, and when the input point moves on the screen, based on the position information of the input point on the movement path, the three-dimensional Function as trajectory line drawing means for drawing a trajectory line indicating the movement path in space,
The trajectory line drawing means changes the line type of the trajectory line according to the moving speed of the input point.   The locus line drawing means is configured to change at least one of a width dimension, a pattern, and a color of the locus line as a line type of the locus line according to a moving speed of the input point. The image processing program according to claim 1, wherein:   The locus line drawing means forms the locus line with a polygon in the three-dimensional space, and sets the position of the vertex forming the polygon according to the moving speed of the input point. The image processing program according to claim 2, wherein the image processing program is configured to change a width dimension.   The trajectory line drawing means is configured to relatively reduce the width dimension of the trajectory line when the moving speed of the input point is relatively high. Image processing program.   The trajectory line drawing means forms the trajectory line as a polygon in the three-dimensional space, and selects from the image image having a change in at least one of a pattern and a color according to the moving speed of the input point. The image processing according to claim 2, wherein at least one of a pattern and a color of the locus line is changed by pasting a texture that is a partial image on the polygon. program. The image includes an intermediate region in which high lightness color portions and low lightness color portions are mixed in a mottled manner, a high lightness region in which the density of the high lightness color portions is relatively high, and the low lightness color portion. An image having a change in pattern, including a low-lightness region having a relatively large density of
When the moving speed of the input point is relatively high, the trajectory line drawing unit selects the texture so as to include the low brightness region more widely, and when the moving speed of the input point is relatively low The image processing program according to claim 5, wherein the image processing program is configured to select the texture so as to include the high brightness area more widely.   An image processing apparatus comprising: a program storage unit that records the image processing program according to any one of claims 1 to 6; and a computer that executes the image processing program stored in the program storage unit.

Images