KR102042309B1 - generating Method of crown-shaped dynamic emitter for the explosion effect implementation - Google Patents

Abstract

In the present invention, a crown-shaped dynamic emitter generation method for realizing the blasting effect generates and applies a crown-shaped fluid emitter used to actually implement an initial model of blasting, and generates a crown shape. The fluid emitter of is to form a realistic blasting model by changing the shape under the control of the user.
The crown-type dynamic emitter generation method for implementing the blasting effect is to generate and apply the most effective crown-shaped fluid emitter that can help to actually implement the initial model of the blasting, and generated crown shape (Crown Shape) The fluid emitter can be intuitively modified according to the user's control, helping to construct a realistic blasting model efficiently, and the user generated the crown shape fluid ejector. It can be used to intuitively transform the shape, and to realize realistic blasting effects as the shape and size change in conjunction with the velocity of the blasting simulation, and a number of extra emitter groups around the emitter. By creating an emitter group separately, there is a remarkable effect of irregularly generating residual smoke constituting the blasting.

Description

{Generating method of crown-shaped dynamic emitter for the explosion effect implementation}

The present invention relates to a crown-shaped dynamic emitter generation method for implementing the blasting effect, and more particularly to the most effective crown-shaped fluid emitter that can help to actually implement the initial model of the blasting (Crown Shape) And apply, and dynamically move the generated crown shape fluid emitter, and the crown shape dynamic fluid emitter can be intuitively deformed under the user's control so that the user can It helps to construct a realistic blasting model, and more realistic blasting visual effects as the shape and speed change as well as the shape of the crown shape and the size is linked with the velocity of the blasting simulation. And a plurality of within a certain range around the dynamic fluid emitter constituting the blasting visual effect It generates a discharge chair group (Extra Emitter Group) and separately, to a plurality of additional release character of the crown type dynamic discharge character generating method for a blast effect implementation of the group generated by the smoke glass irregularly.

Digital contents-related technologies are changing day by day with the spread of high-end hardware and the rapid development of 3D computer graphics programs.

Previously developed around large-scale studios with easy capital support, small-scale studios now have technical implementations that can be applied immediately to movies, animations, and games.

Among the digital content related technologies, the visual effect is still developing, and the destruction effect using the fluid most used among the visual effects is a number of effect elements such as flame, smoke, dust, and debris. ) Is a very complex effect realized through properties such as density, temperature, buoyancy, diffusion, and externally applied elements such as gravity, turbulence, and drag.

In particular, the properties should be applied to irregular movement, when using a general type of fluid emitter, such as sphere, tetrahedron, or hexahedron, even if irregularly applied to the fluid property value will show a similar shape without personality.

Workers now rely on tools that provide a uniform breaking effect, acting as a barrier to slow development.

Apparatus and method for displaying an object having a visual effect of Korean Patent Laid-Open Publication No. 10-2016-0006087 as a prior art include, as a display method, an object in which at least one virtual light source is set. And displaying in a virtual environment, based on the at least one virtual light source, illuminating a virtual area around the object in the virtual environment.

As another prior art, extensible visual effects in active content of a user interface of JP-A-10-2008-0042835 include, as a method for applying a visual effect to a visual element, each including a transform function. Providing a directed acyclic graph (DAG) comprising one or more effects, input and output; Providing visual elements to the input; Determine whether there is a next one of the one or more effects in the DAG, and if present, provide the visual element to the input of the next effect, and determine whether the format of the visual element is compatible with the next effect And if it is not compatible, apply a transform function of the next effect to the visual element, convert the visual element into a compatible format, and change the visual element with the next effect, and Repeating the determining step until no other next one of the one or more effects exists; And providing the visual element to the output.

However, the conventional configuration as described above has a disadvantage that it is difficult to implement the actual blasting effect by changing the fluid property value of the fluid emitter to implement a uniform blasting effect even if the simulation is repeated.

Therefore, through the crown-type dynamic emitter generation method for implementing the blasting effect, the most effective crown-shaped fluid emitter that can help to actually implement the initial model of the blasting (Crown Shape) to create, apply, and generate The crown-shaped fluid ejector can be moved dynamically, and the crown-shaped dynamic fluid ejector can be intuitively transformed according to the user's control, so that the user can realistically blow the realistic blasting model. It can help to build, and realize more realistic blasting visual effects as the shape and speed change in conjunction with Velocity of the blasting simulation, as well as the shape of the crown shape (Crown Shape) A number of additional emitter groups within a certain range, centering around the dynamic fluid emitters that make up the It is intended to provide a crown-type dynamic emitter generation method for separately generating an extra emitter group, and implementing a blasting effect of irregularly generating residual smoke through the plurality of additional emitter groups.

The present invention creates and applies a crown shape fluid emitter used to actually implement the initial model of blasting, and changes the shape of the generated crown shape fluid emitter under user control. It is characterized by building a realistic blasting model.

The crown-type dynamic emitter generation method for implementing the blasting effect is to generate and apply the most effective crown-shaped fluid emitter that can help to actually implement the initial model of the blasting, and generated crown shape (Crown Shape) The fluid emitter can be intuitively modified according to the user's control, helping to construct a realistic blasting model efficiently, and the user generated the crown shape fluid ejector. It can be used to intuitively transform the shape, and to realize realistic blasting effects as the shape and size change in conjunction with the velocity of the blasting simulation, and a number of extra emitter groups around the emitter. By creating an emitter group separately, there is a remarkable effect of irregularly generating residual smoke constituting the blasting.

1 is a view illustrating a crown-type dynamic emitter generation method for implementing the present invention blasting effect
Figure 2 is a complete flow chart of the crown-type dynamic emitter generation method for implementing the blasting effect of the present invention
Figure 3 is a flow chart of Crown Shape Emitter generation of the crown-type dynamic emitter generation method for implementing the blasting effect of the present invention
Figure 4 is a flow chart for creating an Extra Emitter Group of the crown-type dynamic emitter generation method for implementing the blasting effect of the present invention

The present invention creates and applies a crown shape fluid emitter used to actually implement an initial model of blasting in a computer program, and generates the crown shape fluid emitter according to user control. It is characterized by constructing a realistic blasting model by modifying the shape.

In addition, the main object generation step of generating a main object (Main Object) to serve as the fluid emitter; A point extraction step of extracting a plurality of points at random from the main object; A crown shape converting step of repositioning the extracted point position to a random to convert a main object into an irregular crown shape; Converting the main object into a fluid form and converting the main object into a single point aggregate for each point of a predetermined number of points by density; Generating a particle network as many as the number of point aggregates; A primary particle network connection step of extracting a position value of each point aggregate and connecting a particle network to each point aggregate through the position value; An object random generation step of generating an extra object at each point collection position and then applying a random scale and a random rotation to each extra object; Performing a first substitution process of replacing each additional object with a corresponding point position; A binding step of binding the main object of the crown shape to a bounding sphere; Converting the bounding sphere into a fluid form and converting the bounding sphere into a single point aggregate for each point of a predetermined number of points by density; A secondary particle network connection step of extracting a position value of each of the transformed point aggregates and then connecting the particle network to a particle network; By connecting a separate Translate Node to each additional object bound to each point collection, the scale is made smaller than the main object and replaced with the position of each point collection. Performing the second replacement process; An emitter grouping step of grouping fluid emitters generated at a position of each point aggregate into one; After extracting the discharge rate of the fluid emitter, the dynamic shape is built by the extracted discharge rate depending on the scale value of the final crown shape fluid emitter. An emitter dynamic shape construction step of changing a crown shape fluid emitter; Characterized in that consists of.

In addition, the fluid emitter is characterized in that the actual blasting effect as the size of the shape changes in conjunction with the velocity (Velocity) of the blasting simulation.

In addition, it is possible to separately generate a plurality of extra emitter groups around the fluid emitter, characterized in that to generate irregularly the residual smoke constituting the blasting.

The present invention will be described in detail with reference to the accompanying drawings.

1 is an embodiment of a crown-type dynamic emitter generation method for implementing the present invention blasting effect, Figure 2 is a whole flow chart of the crown-type dynamic emitter generation method for implementing the present invention blasting effect, Figure 3 Crown Shape Emitter generation flowchart of the crown-type dynamic emitter generation method for implementing the effect, Figure 4 is a flow chart of Extra Emitter Group generation of the crown-type dynamic emitter generation method for implementing the blasting effect of the present invention.

Specifically, the crown-type dynamic emitter generating method for implementing the blasting effect of the present invention includes a main object generation step of generating a main object (Main object) to play the role of the fluid emitter; A point extraction step of extracting a plurality of points at random from the main object; A crown shape conversion step of converting the extracted point position into a random to convert the main object into an irregular crown shape; Converting the main object into a fluid form and converting the main object into a single point aggregate for each point of a predetermined number of points by density; Generating a particle network as many as the number of point aggregates; A first particle network connection step of extracting a position value of each point aggregate and connecting a particle network to each point aggregate through the position value; An object random generation step of generating an extra object at each point collection position and then applying a random scale and a random rotation to each extra object; Performing a first substitution process of replacing each additional object with a corresponding point position; A binding step of binding the main object of the crown shape to a bounding sphere; Converting the bounding sphere into a fluid form and converting the bounding sphere into a single point aggregate for each point of a predetermined number of points by density; A secondary particle network connection step of extracting a position value of each of the reconverted point aggregates and then connecting to a particle network; A separate Translate Node is connected to each additional object bound to each point collection to make the scale smaller than the main object as a whole, and to the position of each point collection. Performing a second replacement process for replacing; An emitter grouping step of grouping fluid emitters generated at a position of each point collection into one; After extracting the ejector velocity of the fluid emitter, the final crown shape, which is grouped, is subordinated to the scale value of the fluid emitter to build a dynamic shape by the extracted ejection velocity. An emitter dynamic shape construction step of changing a crown shape fluid emitter; It is made of.

The blasting effect is implemented using a 3D Computer Graphic Tool. Although most of the workers simulate the blasting effect by controlling the options in the 3D Computer Graphic Tool. It neglects the shape of the fluid emitter, the most important initial model of blasting.

The shape of the fluid emitter is to repeatedly perform a simulation by applying fluid numerical values such as gravity container, turbulence, drag, etc., which are applied from a fluid container or externally, to implement a blasting effect. It is more important than anything.

The shape of the fluid emitter is an important factor in determining the initial release form of the fluid, and the shape of the emitter determines the quality of the overall blasting.

The main object generation step is to generate a main object to play a role of a fluid emitter, and the main object is responsible for a main emitter during simulation.

In general, an object has a geometric shape, and the geometric shape is formed by gathering a plurality of faces, and the face is generated by gathering three or more edges. Edge is a line connecting two or more points.

That is, the main object also includes a face and an edge.

In the point extracting step, a plurality of points are randomly extracted from the main object.

Each of the extracted points is randomly extracted within the range of the main object, and each point is used to determine a location to generate an extra object.

In the crown shape converting step, the extracted point position is randomly repositioned to convert the main object into an irregular crown shape.

As illustrated in FIG. 1, the main object protrudes in the direction of each point position with respect to the center of the lower end thereof, and forms an irregular crown shape.

The primary point aggregate conversion step is to convert a main object into a fluid form and then reconvert it into one point aggregate for each point of a predetermined number of points by density.

At this time, the number of point aggregates also changes according to the number and density of the points.

The fluid is effect elements such as flame, smoke, dust, and debris, properties such as density, temperature, buoyancy, diffusion, and external elements such as gravity, turbulence, and drag.

The density may be modified by the user and is the number of points included in each unit space.

 The particle network generating step generates a particle network as many as the number of point aggregates, and then performs a primary particle network connection step.

The primary particle network connection step is to extract the position value of each point aggregate, and then connect the particle network to each point aggregate through the position value.

The generated particle network is moved to the position of each point aggregate, and the point aggregate and the particle network corresponding to each position are connected 1: 1.

In other words, one particle network is connected to each point aggregate.

The random object generation step generates an extra object at each point collection position and then applies random scale and random rotation to each extra object. do.

The random value of the scale applied to the additional object may be limited to a certain value or less.

The limitation of the size applied to the additional object prevents a situation in which the size of the additional object is unexpectedly large compared to the main object.

For example, limiting additional objects so they can change randomly within a range smaller than the main object size.

The performing of the first substitution process is to replace each extra object with a corresponding point position.

Therefore, the additional object is located around the main emitter.

The binding step is to bind the main object of the crown shape to a bounding sphere.

On the other hand, the bounding sphere (Bounding Sphere) is a sphere surrounding the object (Object), the bounding sphere is used to optimize the calculation time when checking whether the collision process between the objects (Object).

In this case, the bounding sphere has an irregular curved surface as well as an object having a relatively small number of points, and thus has an irregular curved surface. By applying the same to an object having a curved surface, it is possible to shorten the computation time by optimizing the computation process.

The secondary point aggregate transformation step is to convert the bounding sphere into a fluid form and then reconvert it into one point aggregate per point of a certain number of points by density.

At this time, not only the main object, but also the binding spheres bound to the main object are converted into a fluid.

The secondary particle network connection step is to extract the position value of each of the re-converted point aggregates and to connect to the particle network (Particle network).

In the performing of the second substitution process, each extra object bound to each point set is connected to a separate Translate Node to make the scale smaller than the main object as a whole. Replace with the position of the point collection.

The Translate Node is an element capable of converting scale, position, and rotation, and can be scaled and replaced by the Translate Node.

The emitter grouping step is to group the fluid emitters generated at the position of each point aggregate into one, and as the grouping of the fluid emitters, the group is collectively grouped. You can convert at once.

In the implementation of the blasting effect of the present invention, the direction in which the fluid emitter is discharged is in the normal direction of the fluid emitter, and the normal direction is the vertical direction of the face in the fluid emitter.

That is, the fluid emitter will have a discharge rate.

The step of constructing the emitter dynamic shape extracts the release rate of the fluid emitter, and then extracts it depending on the scale value of the grouped final crown shape fluid emitter. The shape of the crown shape fluid emitter changes by building up the dynamic shape by the rate of discharge.

For example, with a predetermined change in size in steps of the velocity of the fluid emitter, the stage is identified through the velocity of the fluid emitter, and then the size of the fluid emitter is converted according to the stage.

In this case, the speed is increased by one step every time the speed is increased by a certain value (for example, 10) relative to the reference value (for example, 10), and the fluid is discharged each time the step is increased by one step. Let the self grow further by its size (eg 3 in each of the x, y, and z axes).

That is, the present invention can generate a crown shape (Crown Shape) of the fluid emitter to intuitively modify the shape of the fluid emitter under the control of the user, the emitter (Smitte) scale (Emitter) is the movement of the blast simulation As it changes with Velocity, realistic blasting effect can be realized.

Therefore, the method of generating a crown-type dynamic emitter for implementing the blasting effect of the present invention generates and applies the most effective crown-shaped fluid emitter that can help to actually implement the initial model of the blasting, and generated crown It is possible to intuitively modify the shape of the fluid ejector in the shape of the user (Crown Shape) to help build a realistic blasting model efficiently, and to generate the crown shape fluid ejector of the user The control can be used to intuitively transform the shape, to realize realistic blasting effects as the shape and size change in conjunction with the velocity of the blasting simulation, and a number of additional emitter groups around the emitter ( Extra Emitter Group) can be created separately, which is a remarkable effect of irregularly generating the residual smoke constituting the blasting There.

Claims (4)

Create and apply a crown shape fluid emitter that is used to actually implement the initial model of blasting, and modify the shape of the generated crown shape fluid emitter under realistic control by user control In the crown-shaped dynamic emitter generation method for implementing the blasting effect to build a model,
An object generation step of generating an object to serve as the fluid emitter; A point extraction step of adding a face and an edge to an object and extracting a plurality of points at random; A crown shape conversion step of converting an extracted point position to a random to reposition the object to an irregular crown shape; A shape conversion step of converting an object into a fluid form and then converting the object into a form of a point aggregate based on density; A particle network generation step of generating and applying a particle network; A particle network connection step of extracting a position value of each point aggregate and connecting the particle network to a particle network; Generating a plurality of objects and randomly generating an object to apply a random scale and a random rotation to each object; Performing a position primary replacement process of replacing objects generated based on a position value of a point collection with a point position; A binding step of binding an object of a crown shape into a sphere bounding box; A collective reconversion step of converting a sphere into a bounding box fluid form and then reconverting to a point aggregate based on density; A particle network connection step of extracting a position value of each point group and connecting the particle network to a particle network; A separate Translate Node is connected to each Extra Object bound to each Point Set to make the Scale overall smaller and to replace each Point Position. Performing the second replacement process; An emitter grouping step of grouping the generated emitters into one; After extracting the basic rate of release of the fluid, the final crown shape is grouped and subordinated to the scale value of the fluid emitter. A dynamic form construction step of constructing a dynamic form in which the size of the emitter changes; It consists of,
The blasting effect is implemented using a 3D Computer Graphic Tool, by controlling the options in the 3D Computer Graphic Tool to simulate the blasting effect, and implement the blasting effect To implement a fluid simulation, it involves performing a repetitive simulation by applying fluid numerical values such as gravity, turbulence, and drag applied to a fluid container or externally.
The shape of the fluid emitter is an important factor in determining the initial discharge form of the fluid, and the fluid emitter is to realize a realistic blasting effect as the size of the shape changes in conjunction with the velocity of the blasting simulation.
By generating a plurality of extra emitter groups separately around the fluid emitter to irregularly generate the residual smoke constituting the blasting,
The object generation step is to create an object that becomes the main to play the role of fluid emitter, so that the object that becomes the main plays the main emitter during the simulation. Will be
The object has a geometric shape, the geometry is made of a plurality of faces (Face), the face (Face) is generated by gathering three or more edges (Edge), the edge ( Edge is a line connecting two or more points, and the object that is the main also includes a face and an edge.
In the point extraction step, a plurality of points are randomly extracted from an object that is a main, and each extracted point is within a range of an object that is a main. Is randomly extracted from, where each point is used to determine where to create extra objects.
The crown shape conversion step is to reposition the extracted point position (Random) in a random (Random) to convert the main object (Object) to an irregular crown shape (Crown Shape),
The main object (Object) is an irregular crown shape while being formed to protrude in the direction of each point position with respect to the bottom center,
The primary point aggregate conversion step is to convert the object (Main) to the main form into a fluid form and then re-convert to one point aggregate for each point of a certain number of points by density. According to the number and density of the points, the number of point aggregates will also change,
The fluid is an effect element including flame, smoke, dust, and debris, an attribute including density, temperature, buoyancy and diffusion, and an external element including gravity, turbulence, and drag.
The density is the number of points included in each unit space, and can be modified by the user.
The particle network generating step is to create a particle network as many as the number of point aggregates (Particle network), and then to perform the primary particle network connection step,
The primary particle network connection step is to extract the position value of each point aggregate, and then to connect the particle network (Particle network) to each point aggregate through the position value,
The generated particle network is moved to the position of each point aggregate, the point aggregate and the particle network corresponding to each position is to be connected in a 1: 1, one particle network is connected to each point aggregate,
The random object generation step generates an extra object at each point collection position and then applies random scale and random rotation to each extra object. To do it,
The random value of the scale applied to the additional object may be limited to a predetermined value or less, and the limit of the scale applied to the additional object prevents a situation in which the scale of the additional object is unexpectedly large compared to the main object. Will be
In the performing of the first substitution process, each additional object is replaced with a corresponding point position, and the additional object is positioned around the main emitter.
The binding step is to bind the main object of the crown shape to a bounding sphere.
The bounding sphere is a sphere surrounding an object, and the bounding sphere is used to optimize the computation time when checking whether or not a collision process between objects is performed.
The bounding sphere is not only when an object having a relatively small number of points has a regular face, but also has an irregular surface, so that the point has an innumerable irregular surface. Branches can be applied to and used with objects, which can reduce the computation time by optimizing the computation process.
The secondary point aggregate transformation step converts the bounding sphere into a fluid form and reconverts it into a single point aggregate for each point of a predetermined number of points by density. In addition to the object (Object) to be bound, the binding sphere bound to the object (Main) is converted to a fluid,
The secondary particle network connection step is to extract the position value of each of the re-converted point aggregate and to connect to the particle network (Particle network),
In the performing of the second replacement process, an object that becomes a main overall as a scale by connecting a separate translate node to each additional object bound to each point collection. It is made smaller than (Object) and is replaced by the position of each set of points.
The translate node is a factor capable of converting scale, position, and rotation, and can be scaled and replaced by the translate node.
The emitter grouping step is to group the fluid emitters generated at the position of each point aggregate into one, and as the grouping of the fluid emitters, the group is collectively grouped. You can convert at once,
When the blasting effect is implemented, the direction in which the fluid emitter is discharged is the normal direction of the fluid emitter, and the normal direction is the vertical direction of the face in the fluid emitter, and the fluid emitter has a discharge velocity. Will be
The step of constructing the emitter dynamic shape extracts the release rate of the fluid emitter, and then extracts it depending on the scale value of the grouped final crown shape fluid emitter. The shape of the crown shape fluid emitter is changed by building a dynamic shape by the discharge rate.
In the state where the change of the size of the fluid emitter is designated in stages in advance, the step is confirmed by the speed of the fluid emitter, and then the size of the fluid emitter is changed according to the step, wherein the speed is constant compared to the reference value. Each step increases as soon as it is increased by one unit, and each step is increased by one step, so that the fluid ejector further increases by that size,
It is possible to intuitively modify the shape of the fluid emitter under the control of the user by generating the crown shape fluid emitter, and the velocity of the emitter scale and the velocity of the blasting simulation in the blasting simulation. Dynamic emitter generation method of crown type for blasting effect
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