JPH08249496A - Method and device for presenting image - Google Patents

Abstract

PURPOSE: To provide a means with which even a generator without special knowledge and technique for programming can generate an interactive animationan by intuitionally and easily describing an action even for a character of a complicated action procedure, generating an interactive animation by a small number of manhours and describing the action procedure of the charactor by not using any scripts. CONSTITUTION: The action unit list of a charactor within scenarios inputted from a scenario input part 1 is stored in an action unit storing part 2 and the geometrical form of the charactor is in a video generating part 6. When the start condition of the action unit which is read by an action unit designating part 5 is established by a user input from a user input part 3, frame information is calculated based on the action which is described at every action unit. The video generating part 6 generates an image based on the geometrical form stored inside and frame information calculated by the frame information calculating part 4 so as to present it.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image presentation method and apparatus for producing and presenting an animation image that changes according to a user operation.

[0002]

2. Description of the Related Art Three-dimensional computer graphics (C
G) By generating the video in real time, it is possible to realize an interactive three-dimensional CG animation in which the motion of the appearing object in the animation is changed according to the user's input. As an example of using interactive 3D CG animation, flight / drive simulation, 3D CG
There are applications such as games, walk-through simulation that moves the viewpoint inside a building, and visual presentation of three-dimensional objects such as machines, human bodies, and molecular structures.

A method called script animation is known as a method of constructing an animation according to a user's operation. Regarding script animation, refer to [1982, Craig W. Reynolds, "Computer Animation with Scripts and Actors", Computer Graphics, Vol. 16, No. 3, ACM Siggraph, pp. 289-296, (Craig W. Reyn
olds, “Computer Animation
with Scripts and Actors ",
Computer Graphics, Vol. 16,
No. 3, Jully 1982, ACM SIGGRAP
H, pp. 289-296)].

In the script animation, the change of the action of the appearing object and its procedure are defined by a script which is a language dedicated to animation. The action and its execution procedure are individually defined for each appearing object, and when the animation is executed, each script is interpreted and executed according to the user operation or the elapsed time, and the obtained action of each appearing object is set as a global time axis. Map to spatial coordinates. And
An animation image is generated based on the mapping result.

The script animation is particularly suitable for the description of the interactive animation because the spatial coordinates of the appearing object, the start time of the action, and the type of the action can be individually changed according to the user's operation.

On the other hand, there is a method of describing various events (events) that occur during the execution of an animation when writing a script as a trigger for activating the action of an appearing object. It may be called a drive type.

In the event-driven animation, an arbitrary event that occurs during the execution of the interactive animation such as user input, collision between appearing objects, and passage of a set time is set as an event, which is detected during the execution. It is used as a trigger to change the behavior of the appearing object. Also, the communication messages between the appearing objects are treated as events, and the actions of the appearing objects are synchronized. Event-driven animation can set the story progress in detail according to the situation, and can realize highly interactive dialogue animation.

An example of event-driven script animation is described in Japanese Patent Application Laid-Open No. 3-168877.

[0009]

In the conventional script-type interactive animation, when operating an appearing object according to a sequence of sequential, conditional branching and repeating, a state transition between a series of actions is described by a program. It was Therefore, as the operation procedure becomes more complicated, it becomes more difficult to grasp the contents of the program, and there is a problem that a large number of man-hours are required for describing and verifying the operation.

Further, it is necessary to describe the script as a source code of a programming language, which requires specialized programming knowledge and skill. Therefore, it is difficult for an animation creator who does not have such knowledge to create an interactive animation.

The present invention has been made in view of such circumstances, and an object thereof is to describe an operation intuitively and easily even for an appearing object whose operation procedure is complicated, and to interactively operate with a small number of steps. It is to provide a means of creating animations.

[0012] In addition, a means for describing an operation procedure of an appearing object without using a script and, as a result, creating an interactive animation even by a creator who does not have specialized programming knowledge and skills is provided. To do.

[0013]

A video presenting method according to the present invention is a video presenting method for presenting a series of videos by arranging a plurality of objects in a space and generating images of the objects for each frame. , A motion unit list in which motion units consisting of the motion of the object and a start condition for activating the motion are connected in the order of execution, and a geometric attribute of the object to form a scenario, and the motion unit is read from the scenario. If the start condition of the operation unit connected to the operation unit is satisfied, a series of processes for newly reading out the operation unit having the satisfied start condition as an element is repeated to execute the operation of the scenario unit. An image of the object is generated for each frame based on an attribute and the action.

The image presenting apparatus of the present invention is a video presenting apparatus that presents a series of images by arranging a plurality of objects in space and generating images of the objects for each frame, so that user input is performed. Scenario input for inputting a user input unit for capturing, a motion unit list in which motion units including motions of the object and activation conditions for activating the motions are connected in the execution order, and a geometrical attribute of the object Unit, an operation unit storage unit that stores the operation unit list of the scenario and outputs the operation unit, and the activation condition of the operation unit connected to the operation unit is read from the operation unit storage unit, and the activation condition is the user. An operation unit designating section for outputting an operation unit having an established start condition as an element to the operation unit storing section if the input is satisfied, and an operation of the operation unit A frame information calculation unit that calculates the position and deformation of the object for each frame based on the user input and outputs the frame information as frame information, and image generation that generates an image based on the geometric attribute of the scenario and the frame information. It is characterized in that it is composed of a section.

Further, the video presenting apparatus of the present invention has an event detecting section for detecting and outputting an event occurring based on the user input, the geometric attribute and the frame information, and the operation unit designating section is provided. Reading the activation condition of the operation unit connected to the operation unit from the operation unit storage unit, and outputting the operation unit having the established activation condition as an element to the operation unit storage unit if the activation condition is satisfied by the event It is characterized by

Further, in the video presenting apparatus of the present invention, the operation unit designating section reads out the activation condition of the operation unit connected to the operation unit from the operation unit storage section, and the event to be the input of the activation condition is described. When the event detection unit detects the activation condition and the activation condition is satisfied by the event, the operation unit including the established activation condition as an element is output to the operation unit storage unit.

[0017]

In the image presentation method and apparatus of the present invention,
Define the appearance object of the interactive animation as repeating the procedure of "When certain information is input, the operation currently being executed is interrupted and a new operation is started according to the input information", A set of a single operation and its start condition (operation condition) is used as a basic unit (operation unit) of the operation, and a series of operation procedures are described by list data connecting the operation units.

In this video presenting apparatus, list data of operation units is stored, and operation units to be newly executed are sequentially read out from the stored operation unit list. The newly executed operation unit searches the list for an operation unit connected to the currently executed operation unit.

Then, the position of the appearance object in the space is calculated for each frame based on the read operation data of the operation unit, and an image is generated and presented based on the calculation result.

The new motion unit is determined by evaluating the motion condition of the motion unit searched every time there is a user input or the like and according to the evaluation result.

In order to execute the interactive animation by the series of procedures as described above, the creator of the interactive animation intuitively understands that "when a certain condition is satisfied, such an operation is started". It is possible to describe an interactive animation by setting a causal relationship that is easy to do as a motion unit and connecting these motion units in the order of execution.

The operation unit is described by a combination of operation data and data which is a trigger for starting the operation, and the execution order of the operation unit is set by a link between the operation units. Therefore, it is possible to describe the behavior of the appearing object without using a programming language.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a first embodiment of the video presenting apparatus of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the first video presentation device of the present invention. The video generation apparatus of this embodiment includes a scenario input unit 1, a motion unit storage unit 2, a user input unit 3, a frame information calculation unit 4, a motion unit designation unit 5, and a video generation unit 6. ing.

The operation will be described below according to the configuration of this embodiment. In the following description, a case where image generation is performed using the three-dimensional CG technology will be described, but the same can be applied to the case where a two-dimensional image such as a sprite image composite display is used.

The scenario input unit 1 fetches the scenario data described below from the outside and outputs it as a scenario 1001. The user input unit 3 also takes in data output by a mouse, keyboard, etc. operated by the user and outputs it as user input 1003.

The data captured by the scenario input section 1 and the user input section 3 is, for example, a user's keyboard,
Data obtained by operating a mouse, three-dimensional coordinate input device, etc., data recorded in advance in a storage device such as a magnetic tape or magnetic disk, or generated by another program running on the same computer. It is possible to use the data stored in the memory, or the data stored in the memory as a result of communication with another computer or a video generation device connected by a communication line.

The scenario 1001 will be described below (1).
It is composed of an operation unit list and (2) geometric attributes.

In this embodiment, the light source and the viewpoint are treated in the same manner as other objects as appearing objects having special geometric attributes such as light distribution characteristics and visual field characteristics.

(1) Action Unit List The action unit list includes action units composed of (A) actions of the appearing object, (B) activation conditions, and (C) connection information.
It is a list connected in the order of execution. FIG. 6 shows operation units 61 to
It is an explanatory view of an operation unit list constituted by 64.

(A) Operation The information of the movement executed by the appearing object when the result of the evaluation of the starting condition described later is satisfied is described as the operation.

The motion information of the appearing object in the space can be defined by the temporal change of the correspondence relationship from the coordinate system to which the appearing object belongs to the coordinate system of the higher order or the world coordinate system.

As an example, a homogeneous coordinate matrix M for performing parallel movement, rotation, scaling (enlargement, reduction), and combination thereof from the object coordinate system to which the appearing object belongs to the upper coordinate system.
For each frame interval (t1, t2, ...,
tn-1, tn) sampling recording (M (t1), M
(T2), ..., M (tn−1), M (tn)) can be defined as motion information. As the frame interval,
For example, the field time of TV broadcasting (NTSC system) (1
/ 60 seconds) or the frame time (1/30 seconds) or the like can be set to generate an image with smooth movement.

Further, a correspondence D equivalent to a homogeneous coordinate matrix at time t is obtained by a function D having time t as a parameter.
(T) may be defined and the combination of the function D and the parameter t may be used as the motion information of the object. For example, the movement of the object may be described by the spline curve function (D) and its input parameter (t).

When an object such as a human body in which partial objects are joined by joints is used, or when an appearing object is further hierarchically composed of a plurality of parts, connection between the partial objects is performed. It is possible to define the motion information corresponding to each of, and the motion of the appearing object can be defined by a set of these motion information.

Particularly, in the case of an object formed by connecting partial objects by joints, the movement may be described by the temporal change of the rotation angle at the joint between the object coordinate systems defining the partial objects.

Furthermore, the time change of the parameter for deforming the appearing object may be described as the motion information. For example, when performing a primary transformation such as an affine transformation on a appearing object to transform it, the transformation may be described by a set of affine transformation matrices described in chronological order.

The motion information of the appearing object described above can be described only by input parameters if the motion calculation algorithm is fixed. Further, when the calculation algorithm is changed depending on the case, the motion information can be obtained by combining the algorithm or its type and the parameter.

(B) Start condition The start condition is set as a function for determining the start of the above-mentioned operation. Each time an event such as a user's operation of the keyboard or mouse occurs, the activation condition is evaluated by using these generated events as the input of the function.

The input value of the activation condition function is not necessarily limited to the user input, and an area for storing the evaluation result of the previous activation condition is provided inside the operation unit designating unit 5 described later, and this value is used as the input. Good. For example, the number of repetitions when the operation unit is repeatedly executed may be stored and used. The arithmetic operation to the variable area in this case is also treated as a part of the operating condition.

(C) Connection Information After the execution of the operation unit is completed, the connection information for the operation unit to be executed subsequently is set.

The connection information is described by a pointer (address of a storage area in which an operation unit is stored). Also, when writing a scenario to a file for recording,
A unique index number may be assigned to all the operation units that make up the operation unit list, and the connection information may be described by the index number.

By connecting with the connection information, the set of operation units constitutes a list or graph structure as a whole.

The list in which the operation units are connected describes the sequential execution of the operations by connecting the operation units one after another according to the connection information. Further, when performing control such as conditional branching or repetition, a plurality of connection information is provided for one operation unit and each branch destination operation unit is described.

(2) Geometric Attribute Geometry describes the shape of the appearance object, the brightness and material of the surface of the shape, the texture image to be texture-mapped, the correspondence between the texture image and the shape surface, and the like.

The shape data is described by, for example, coordinate data of a polygon in the object coordinate system, control point data of a spline curved surface, or the like. In addition, the material of the shape surface is described by the color brightness value, the reflection coefficient, and the like.

When an appearing object such as an object having joints is configured by hierarchically connecting the partial appearing objects, the hierarchical relation management information and the positional relationship between the partially appearing objects are set as geometric attributes. As.

The operation unit storage unit 2 stores the operation unit list of the scenario 1001 and specifies the operation unit 1005 described later.
The operation unit designated in 1 is output as the operation unit 1002.

The operation unit storage unit 2 can output the operation unit 1002 by adding a code or information indicating the type of the operation unit to be output. For example, whether or not to execute an operation in the frame information calculation unit 4 to be described later is added as a code according to the specification of the operation unit specification 1005 and is output as the operation unit 1002. It is possible to distinguish which is output.

When the operation unit specification 1002 includes an instruction to output a plurality of operation units, the operation unit storage unit 2
Outputs multiple specified operation units.

The operation flow of the frame information calculation unit 4 is shown in FIG.
It shows in (B).

The frame information calculation unit 4 reads the operation of the first operation unit (initial operation unit) in the operation unit list as an initial process (4B1).

Then, every time the operation unit 1002 is input, it is checked whether or not the start condition is already satisfied for the input operation unit and it is the execution operation unit to be executed (4B2). If there is, the operation is read (4B6). Whether it is an execution operation unit or not is determined by identification information or the like added to the operation unit.

After inputting the motion, the frame information for one frame is calculated based on the user input 1003 (4B3),
After one frame time has elapsed, it is output as frame information 1004 (4B4, 4B5). Frame information calculation unit 4
The frame information 1004 is obtained by repeating the above series of processing.
Is output.

The frame information 1004 is described as information on the position and rotation of the appearing object in a certain frame.
For example, the frame information 1004 can be defined by defining a coordinate transformation matrix from the object coordinate system local to the appearing object to the world coordinate system for each appearing object. When the appearance object is to be deformed in shape, a deformation algorithm may be determined and treated as a part of the frame information 1004 together with the algorithm parameter.

The frame information 1004 may be calculated not only based on the motion information of the motion, but also based on the user input 1003 or both.

As an example of calculating the frame information based on the user input 1003, the parameters such as the position coordinate of the viewpoint and the rotation angle around the three axes in the line-of-sight direction are input by the user.
The frame information 1004 may be calculated based on the result of the change. In this way, the position of the viewpoint and the direction of the line of sight can be changed in real time according to the operation of the three-dimensional input device, and the walk-through simulation of moving inside the building while changing the position of the viewpoint. Can be realized.

The operation unit designation unit 5 calculates and outputs the operation designation unit 1005 based on the activation condition and connection information of the operation unit 1002 and the user input 1003.

The operation flow of the operation unit designating section 5 is shown in FIG.
It shows in (A).

The operation unit designating section 5 reads the connection information of the first operation unit (initial operation unit) in the operation unit list as an initial process (4A1).

Then, the operation unit specification 1 for specifying the output of the operation unit (connection operation unit) connected by the connection information.
005 to the operation unit storage unit 2 (4A2),
The activation condition of the connection operation unit output as a result is read (4A3).

At this time, a pointer or index number is used to specify the operation unit to be output. Then, the type of the operation unit to be output to the operation unit storage unit 2 can be designated by, for example, a method of adding a code for identification to the operation unit storage unit.

After inputting the start condition of the connection operation unit, the operation unit designation unit 5 repeats the evaluation as to whether the start condition is satisfied each time there is a user input 1003 (4A4, 4A4,
A5).

If the condition is satisfied, the operation unit designating unit 2 outputs the operation unit specification 1005 that specifies that the operation unit having the satisfied start condition as an element is output as the execution operation unit.
(4A6).

Then, the output start condition and connection information for each execution operation unit are newly read (4A7), and the above series of processing is repeated.

When a plurality of operation unit pointers are set as the connection information of the operation unit 1002, the activation conditions of all the connection operation units are read, each activation condition is sequentially evaluated, and the activation conditions that are satisfied are determined. The operation unit is the execution operation unit.

When a plurality of preconditions are satisfied at the same time, the priority order may be set, for example, according to the execution order of evaluation.

For example, in FIG. 6, two operation units, an operation unit 63 and an operation unit 64, are connected to the operation unit 62. In this case, the start condition 3 and the start condition 4 of the two connected operation units are sequentially evaluated, and the operation to be executed next according to the result (either the operation 3 or the operation 4).
Select to determine.

FIG. 7 is an explanatory diagram of the above-described operation selection processing. In FIG. 7, after first performing the operation 1, the operation 2 is executed under the activation condition 2 and the operation when the activation condition 3 is satisfied is designated as 71, and similarly, the activation condition 4 is satisfied after the execution of the operation 2. The operation in this case is shown at 72.

Further, in the case where a series of operation units is executed a predetermined number of times, a variable area for storing the number of repetitions is secured inside the operation unit designating section, and a variable value is set for each repetition. It is also possible to perform an operation (increment or decrement operation of a variable, etc.) on the other hand and use the operation result as the input of the activation condition.

For example, when a certain operation unit is repeatedly executed N times, a variable area corresponding to the operation unit is first secured and a positive integer N is substituted. After this, after repeating the execution of the operation unit by tracing the connection condition, decrementing 1 from N, if the result is a positive integer, the same execution is repeated, and if the result is 0, repeat processing is terminated and the next The operation unit of is executed.

In FIG. 6, the operation unit 6 is different from the operation unit 64.
4 shows a case in which 4 itself is connected as the next operation unit, and the exit condition of the repeated loop is described in the start condition 4.
The operation unit 64 is repeatedly executed until the escape condition of the start condition 4 is satisfied.

The video generation unit 6 stores the geometric attribute of the appearance object from the scenario 1001, generates an image for each frame based on the stored geometric attribute and the frame information 1004,
The video is presented by a series of generated images.

In the image generation in the image generation section 6, coordinate conversion, clipping, brightness calculation, perspective projection calculation, shading, hidden surface are performed based on the position and shape in space of the appearing object including the viewpoint and the light source and the attributes of the surface. Image generation processing is performed by a series of three-dimensional computer graphics techniques such as erasing processing.

At this time, if the deformation of the shape of the appearing object is designated in the frame information, the shape is transformed based on the designated transformation algorithm and parameters to generate the image.

Next, a second embodiment of the image presentation device of the present invention will be described.

FIG. 2 is a block diagram showing an embodiment of the second video presentation device of the present invention.

The video presenting apparatus of this embodiment is different from the first embodiment in that the event detecting unit 26 is added, and the action unit designating unit 25 is based on the event detected by the event detecting unit 26.
Is to evaluate the starting conditions.

The operations of the operation unit designating section 25 and the event detecting section 26 shown in FIG. 2 will be described below.

FIG. 5A shows an operation flow of the operation unit designating section 25. The operation unit designating unit 25 inputs the event 2006 as an input for the evaluation of the activation condition (5A4). The other series of processing is performed in the same manner as the processing in the operation unit designating unit in the first embodiment.

In the event-driven animation, message communication between appearing objects is performed by exchanging a dedicated message event between appearing objects to change the behavior of another appearing object according to the state of the appearing object. For example, the progress of the animation may be changed.

In such a case, in this embodiment, an area for message communication is provided for each appearing object inside the operation unit designating section 24, and a writing operation and a reading / erasing operation of a message event to this area are framed. Messages can be sent and received.

In the above case, the message communication is performed by expanding the operation so that the transmission of the message event is treated as a part of the operation of the appearance object, and further using the received value of the above-mentioned message event as the input value of the activation condition. You can change the appearing object by and execute interactive animation.

The event detection unit 26 stores the geometric attribute of the scenario 2001, calculates the position and shape of the appearing object in the world space from the geometric attribute and frame information 2004, and detects a collision event between the appearing objects.

Further, a counter for detecting the passage of time is provided inside the event detection unit 26, the counter value is updated every time the frame time passes, and the counter value is used as the global elapsed time of the interactive animation. To do.

Then, a user input event is detected from the user input 2003.

The event detector 26 outputs various events or counter values detected as described above as an event 2006.

Next, a third embodiment of the video presenting apparatus of the present invention will be described.

FIG. 3 is a block diagram showing an embodiment of the third image presentation device of the present invention.

In the video presentation apparatus of this embodiment, the operation unit designating section 35 designates the event type and parameters necessary for the evaluation of the activation condition in the event detecting section 36 in advance, as compared with the second embodiment. Is characterized by. Also,
The event detecting unit 36 is characterized by detecting an event based on the above-mentioned specified information of the detected event.

The operations of the operation unit designating section 35 and the event detecting section 36 shown in FIG. 3 will be described below.

FIG. 5B shows an operation flow of the operation unit designating section 35. After inputting the activation condition (5B3), the operation unit designating unit 35 obtains the event type and parameters required for the evaluation of the activation condition, and outputs the event detection designation 3007 to the event detecting unit 36 (5B4). The other series of processing is performed in the same manner as the operation unit designating unit of the second embodiment.

In the event detection designation 3007, when the activation condition is satisfied by the collision between the appearing objects, for example, the combination of the name or registration number of the object of the collision is designated in combination with the type designation representing the collision detection. .

When the activation condition is satisfied when the set time elapses (real time), the set time from the start of the operation to the event occurrence is designated together with the type designation. Similarly, when the user input is the activation condition, the user input value for satisfying the activation condition is output as the event detection designation 3007 together with the type designation.

The event type and parameters may be obtained from the start condition as described above, or may be described in advance as part of the start condition.

By designating the event type and parameters to be detected before event detection by the event detection designation 3007, the number of events 3006 output by the event detection unit 36, which will be described later, can be reduced, and the operation unit designation unit It is possible to reduce the amount of calculation for the evaluation of the start condition in 35. Further, it is possible to set the elapsed time counted from the start of execution of the operation and change the operation of the appearing object due to the timeout.

The event detection unit 36 stores the geometric attribute of the scenario 3001, calculates the position and shape of the appearing object in the world space from the geometric attribute and the frame information 3004, and specifies the appearing object based on the event detection designation 3007. Detect collisions or interference between them.

Further, a counter for detecting the passage of time is provided inside the event detecting section 36, the counter value is updated every time the frame time passes, and the set time elapses based on the event detection designation 3007. To detect.

Then, the user input event is detected based on the user input 3003 and the event detection designation 3007.

The event detector 36 outputs various events detected as described above as an event 3006.

[0101]

As described above, in the image generating apparatus of the present invention, interactive animation is performed while sequentially reading out the operation units in the order of execution from the data in which the operation unit data in which the operation and its start condition are set are connected in a list. Since the execution is performed, the interactive animation creator can describe the motion of the appearing object while intuitively understanding and understanding the motion procedure, and can easily describe and create a complicated and large-scale animation.

Further, since the operation unit data can be described by combining the operation data and the event that serves as the trigger, and the execution order of the operation units can also be set by the link between the operation units, knowledge of programming language specifications and programming skills. Even an animation creator who does not have the effect of being able to describe the action of an appearing object and its procedure.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a first video presentation device of the present invention.

FIG. 2 is a block diagram showing an embodiment of a second video presentation device of the present invention.

FIG. 3 is a block diagram showing an embodiment of a third video presentation device of the present invention.

FIG. 4 (A) is an operational flowchart of the embodiment of the first video presentation device of the present invention. (B) An operation flow chart of the embodiment of the first video presentation device of the present invention.

FIG. 5 (A) is an operation flow diagram of the embodiment of the second video presentation device of the present invention. (B) An operation flow chart of the embodiment of the third video presentation device of the present invention.

FIG. 6 is an explanatory diagram of an operation unit list.

FIG. 7 is an explanatory diagram of conditional branching operation.

[Explanation of reference symbols] 1,21,31 Scenario input unit 2,22,32 Motion unit storage unit 3,23,33 User input unit 4,24,34 Frame information calculation unit 5,25,35 Motion unit designation unit 26, 36 Event detection unit 6, 27, 37 Video generation unit 1001, 2001, 3001 Scenario 1002, 2002, 3002 Action unit 1003, 2003, 3003 User input 1004, 2004, 3004 Frame information 1005, 2005, 3005 Action unit designation 2006, 3006 Event 3007 Event detection specification 61, 62, 63, 64 Operation unit 71 Operation description when start condition 3 is satisfied 72 Operation description when start condition 4 is satisfied

Claims (4)

[Claims] 1. A video presentation method for presenting a series of videos by arranging a plurality of objects in space and generating an image of the object for each frame, in order to activate the motion of the object and the motion. An operation unit list in which the operation units consisting of
And a geometrical attribute of the object, a scenario is configured, an operation unit is read from the scenario, the operation of the operation unit is executed, and if the activation condition of the operation unit connected to the operation unit is satisfied, the established activation is performed. A method for presenting a video, characterized in that a series of processes for newly reading an action unit having a condition as an element is repeated to generate an image of the object for each frame based on the geometric attribute of the scenario and the action. 2. A video presentation device for presenting a series of videos by arranging a plurality of objects in space and generating images of the objects for each frame, and a user input section for receiving a user input; An operation unit list in which operation units, each of which is composed of an operation and a start condition for starting the operation, are connected in the execution order,
And a scenario input section for inputting a scenario composed of the geometrical attributes of the object, an operation unit storage section for storing an operation unit list of the scenario and outputting an operation unit, and an activation of an operation unit connected to the operation unit An operation unit designating unit for reading out a condition from the operation unit storage unit and outputting an operation unit having the established activation condition as an element to the operation unit storage unit when the activation condition is satisfied by the user input; A frame information calculation unit that calculates the position and deformation of the object for each frame based on a motion and the user input, and outputs the frame information as frame information, and generates an image based on the geometric attribute of the scenario and the frame information. An image presentation device comprising: an image generation unit. 3. An operation detecting section that detects and outputs an event that occurs based on the user input, the geometric attribute, and the frame information, and the operation unit specifying section is an operation connected to the operation unit. 3. The unit activation condition is read from the operation unit storage unit, and if the activation condition is satisfied by the event, an operation unit having the established activation condition as an element is output to the operation unit storage unit. The video presentation device described in 1. 4. The operation unit designating section reads out a start condition of an operation unit connected to the operation unit from the operation unit storing section, and causes the event detecting section to detect an event which is an input of the start condition, The video presentation device according to claim 3, wherein if the activation condition is satisfied by an event, an operation unit having the satisfied activation condition as an element is output to the operation unit storage unit.