CN104574496A - Static shadow and dynamic shadow fusing method and device for light map calculation - Google Patents
Static shadow and dynamic shadow fusing method and device for light map calculation Download PDFInfo
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- CN104574496A CN104574496A CN201410849745.5A CN201410849745A CN104574496A CN 104574496 A CN104574496 A CN 104574496A CN 201410849745 A CN201410849745 A CN 201410849745A CN 104574496 A CN104574496 A CN 104574496A
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- G06T15/00—3D [Three Dimensional] image rendering
- G06T15/50—Lighting effects
- G06T15/60—Shadow generation
Abstract
The invention discloses a static shadow and dynamic shadow fusing method and device for light map calculation. The method comprises the steps that the ratio of a dynamic shadow to a shadow fusion area is calculated, wherein the shadow fusion area includes a static shadow and the dynamic shadow; the color value of each pixel point in the shadow fusion area is calculated according to the ratio. According to the static shadow and dynamic shadow fusing method and device for light map calculation, the static shadow in a static light map and the dynamic shadow which is calculated dynamically in real time are fused, and thus a good shadow effect can be kept on the premise that a large amount of calculation cost is not needed in a broad scene.
Description
Technical field
The present invention relates to area of computer graphics, particularly relate to a kind of calculate illumination pattern static shade and the method that merges of dynamic shadow and device.
Background technology
Online game, also known as " game on line ", is called for short " network game ".Refer to internet to be transmission medium, with the server of gaming operators and subscriber computer for processing terminal, take game client software as the window of information interaction, be intended to realize amusement, leisure, exchange and obtain the individuality MMOG with sustainability just invented.In 3D online game, simulate effect of shadow true to nature and very important effect is played to game experiencing, but for subscriber computer, the extensive shadow that calculates in real time cannot bear.
Based on the consideration of the simulation of vivid effect and the service ability of subscriber computer, static light-maps becomes a kind of selection scheme, in the softwares such as 3dsmax, precalculating shadow and result being kept at one puts up in figure, in 3D online game, directly use this pinup picture afterwards, just can obtain good effect of shadow.But the shortcoming of static light-maps is, because shadow information is precalculated, be static, and have a lot of object to be transportable in game, such as role or leaf are dynamic, and dynamic object cannot use static light-maps.Can use for dynamic object and calculate shadow method in real time, but the object near player leading role can only be calculated, otherwise huge computing cost can be brought.If but distant view does not have hatching effect, scene can seem untrue, reduces game experiencing.
If static precomputation light-maps and limited (near only calculating small part model) dynamic realtime are calculated the scheme combined, so namely can guaranteed efficiency, the demand of dynamic object can be met again.Now bring another one problem, how both perfections being merged, namely dynamic shadow and static shade occur how merging simultaneously.
At present mainly through selecting single Shading Rendering method by district, such as, at the static shadow map of indoor use, calculate at outdoor application short distance dynamic realtime, shade when avoiding dynamic shadow and static shade simultaneously to occur merges problem.
The shortcoming of prior art is: the fusion that cannot realize static shade and dynamic shadow, and picture fidelity in openr scene is not high.
Summary of the invention
In view of this, the invention provides a kind of calculate illumination pattern static shade and the method that merges of dynamic shadow and device, merged mutually by the dynamic shadow making the static shade in static light-maps and dynamic realtime calculate, make open scene while not needing to bear huge computing cost, good effect of shadow can also be kept.
First aspect, the invention provides a kind of calculate illumination pattern static shade and the method that merges of dynamic shadow, comprising: calculate the ratio that dynamic shadow accounts for shade corresponding circle of sensation, wherein, shade corresponding circle of sensation comprises static shade and dynamic shadow; According to the color value of each pixel in described ratio computational shadowgraph corresponding circle of sensation.
Further, described calculating dynamic shadow accounts for the ratio of shade corresponding circle of sensation, and wherein, shade corresponding circle of sensation comprises static shade and dynamic shadow specifically comprises: according to following formula, calculates the ratio that dynamic shadow accounts for shade corresponding circle of sensation:
F＝(Ds-Xd)/(De-Ds)，
Wherein, Ds is the distance of starting pixels point to camera of shade corresponding circle of sensation, and De is the distance of end pixel point to camera of shade corresponding circle of sensation, Xd be in shade corresponding circle of sensation arbitrary pixel to the distance of camera.
Further, describedly specifically to comprise according to the color value of each pixel in described ratio computational shadowgraph corresponding circle of sensation: according to following formula, the color value of arbitrary pixel in computational shadowgraph corresponding circle of sensation:
R＝Xa*(1-F)+Xb*F
Wherein, Xa is the color value of this pixel in static echo, and Xb is the color value of this pixel in dynamic shadow figure;
Repeat above-mentioned calculating, obtain the color value of each pixel in shade corresponding circle of sensation.
Further, after according to the color value of each pixel in described ratio computational shadowgraph corresponding circle of sensation, also comprise: the color value of each pixel in the shade corresponding circle of sensation that employing calculates, arranges described shade corresponding circle of sensation, obtains the echo after merging.
Second aspect, present invention also offers a kind of calculate illumination pattern static shade and the device that merges of dynamic shadow, comprising: the first computing module, accounting for the ratio of shade corresponding circle of sensation for calculating dynamic shadow; Second computing module, for the color value according to each pixel in described ratio computational shadowgraph corresponding circle of sensation.
Further, described first computing module specifically for: according to following formula, calculate dynamic shadow and account for the ratio of shade corresponding circle of sensation:
F＝(Ds-Xd)/(De-Ds)，
Wherein, Ds is the distance of starting pixels point to camera of shade corresponding circle of sensation, and De is the distance of end pixel point to camera of shade corresponding circle of sensation, Xd be in shade corresponding circle of sensation arbitrary pixel to the distance of camera.
Further, described second computing module also comprises color calculating sub module and double counting submodule;
Color calculating sub module, for according to following formula, the color value of arbitrary pixel in computational shadowgraph corresponding circle of sensation:
R＝Xa*(1-F)+Xb*F
Wherein, Xa is the color value of this pixel in static echo, and Xb is the color value of this pixel in dynamic shadow figure;
Double counting submodule, for repeating above-mentioned calculating, obtains the color value of each pixel in shade corresponding circle of sensation.
Further, described device also comprises: echo module, for storing the color value of pixel each in shade corresponding circle of sensation.
Provided by the invention a kind of calculate illumination pattern static shade and the method that merges of dynamic shadow and device, accounting for the ratio of shade corresponding circle of sensation and the color value according to each pixel in described ratio computational shadowgraph corresponding circle of sensation by calculating dynamic shadow, realizing the fusion of static shade and dynamic shadow.Make while not increasing computing cost, object at a distance also can have shade, improves the fidelity of game picture.
Accompanying drawing explanation
By reading the detailed description done non-limiting example done with reference to the following drawings, other features, objects and advantages of the present invention will become more obvious;
Fig. 1 is that a kind of that the embodiment of the present invention one provides calculates the static shade of illumination pattern and the method flow diagram of dynamic shadow fusion;
Fig. 2 a is that the one that the embodiment of the present invention one provides calculates dynamic shadow pictorial diagram in real time;
Fig. 2 b is that the embodiment of the present invention one provides a kind of fusion shade pictorial diagram;
Fig. 3 is that a kind of that the embodiment of the present invention two provides calculates the static shade of illumination pattern and the apparatus module figure of dynamic shadow fusion.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.Be understandable that, specific embodiment described herein is only for explaining the present invention, but not limitation of the invention.It also should be noted that, for convenience of description, illustrate only part related to the present invention in accompanying drawing but not full content.
Embodiment one
The embodiment of the present invention one provides a kind of and calculates the static shade of illumination pattern and the method for dynamic shadow fusion.Fig. 1 is that a kind of that the embodiment of the present invention one provides calculates the static shade of illumination pattern and the method flow diagram of dynamic shadow fusion.As shown in Figure 1, described method comprises:
Step 110, calculating dynamic shadow account for the ratio of shade corresponding circle of sensation, and wherein, shade corresponding circle of sensation comprises static shade and dynamic shadow;
In order to save computing cost, all can preset a fixing dynamic shadow in 3D game near player leading role and playing up distance, this apart from object can play up dynamic shadow, and can not static shade be played up at this apart from interior.But, in the scene that some are openr, in order to improve the fidelity of picture and save computing cost, reasonable method is exactly play up in distance at fixing dynamic shadow to play up dynamic shadow, plays up distance and plays up static shade outward exceeding fixing dynamic shadow.Therefore, play up the edge of distance at fixing dynamic shadow, need to carry out static shade and dynamic shadow fusion, can seamlessly transit.Described shade corresponding circle of sensation refers to the region needing to carry out dynamic shadow and static shade and carry out merging in the same area of scene.Described dynamic shadow refers to the shade calculated in real time, and described static shade refers to static light-maps.
In this step, according to following formula, calculate the ratio that dynamic shadow accounts for shade corresponding circle of sensation:
F＝(Ds-Xd)/(De-Ds)，
Wherein, Ds is the distance of starting pixels point to camera of shade corresponding circle of sensation, and De is the distance of end pixel point to camera of shade corresponding circle of sensation, Xd be in shade corresponding circle of sensation arbitrary pixel to the distance of camera.
At this, the camera in 3D online game is generally used for controlling the visual angle in current game scene.Camera is bundled on the body of player leading role.Generally, following three kinds of matrixes are had: world's matrix (world matrix) in the 3D online game world, it is for the position of control object in scene of game or attitude, depending on/camera matrix (view matrix) its for controlling the position of camera in scene of game and attitude, and then which object is visible in decision scene of game, which object is sightless; Projection matrix (project matrix), how it shows on screen for controlling visible oBject.
Step 120, color value according to each pixel in described ratio computational shadowgraph corresponding circle of sensation.
In this step, according to following formula, the color value of arbitrary pixel in computational shadowgraph corresponding circle of sensation:
R＝Xa*(1-F)+Xb*F
Wherein, Xa is the color value of this pixel in static echo, and Xb is the color value of this pixel in dynamic shadow figure;
Repeat above-mentioned calculating, obtain the color value of each pixel in shade corresponding circle of sensation.
At this, the value of F can calculate according to the formula provided in step 110, and wherein, Ds is the distance of starting pixels point to camera of shade corresponding circle of sensation, and this distance is determined.De is the distance of end pixel point to camera of shade corresponding circle of sensation, and this distance is also determined.Xd is the distance of shade corresponding circle of sensation this pixel interior to camera.This distance obtains from depth map.In numeric representation scene in described depth map, arbitrary pixel is to the distance of camera.
After according to the color value of each pixel in described ratio computational shadowgraph corresponding circle of sensation, also comprise: the color value of each pixel in the shade corresponding circle of sensation that employing calculates, arranges described shade corresponding circle of sensation, obtains the echo after merging.In scene, determine the region needing to carry out shade fusion, calculate the color value of each pixel in shade corresponding circle of sensation, the color value of each pixel in shade corresponding circle of sensation is stored, obtain the echo after merging.
The embodiment of the present invention one provide a kind of calculate illumination pattern static shade and the method that merges of dynamic shadow, account for the ratio of shade corresponding circle of sensation and the color value according to each pixel in described ratio computational shadowgraph corresponding circle of sensation by dynamic shadow, realize the fusion of static shade and dynamic shadow.Make to use two kinds of shade account forms in the same area in scene, while not increasing computing cost, object at a distance also can have shade, improves the fidelity of game picture simultaneously.
In the same area of scene, scene is divided into three regions according to the mode of Shading Rendering, first area is that dynamic shadow region refers to utilize the method calculated in real time to play up shade, second area is that shade integration region refers to and utilizes the method that dynamic shadow and static shade merge to play up shade, and the 3rd region is that static shadow region refers to and plays up shade by the method for static light-maps.Fig. 2 a is that the one that the embodiment of the present invention one provides calculates dynamic shadow pictorial diagram in real time, present composition graphs 2a is described, and because leaf can move, therefore near tree, plays up dynamic shadow, but tree and buildings are at a distance in the same area, if play up shade to buildings at a distance, then must use dynamic shadow figure, and this can bring huge computing cost, therefore, in the prior art, shade is not played up to buildings at a distance, but make the fidelity of game picture not high like this.Fig. 2 b is that the embodiment of the present invention one provides a kind of shade pictorial diagram, tree is calculated in real time, play up dynamic shadow, then the method utilizing static shade provided by the invention and dynamic shadow to carry out merging realizes the transition of dynamic shadow to static shade, buildings is at a distance made to play up shade, the method that shade played up by buildings at a distance can be utilize the method that dynamic shadow and static shade merge to play up shade, also can be utilize the method for static light-maps to play up shade, this depends on the region residing for it.Which increase the fidelity of game picture, and not obvious increase computing cost.
Embodiment two
The embodiment of the present invention two provides a kind of and calculates the static shade of illumination pattern and the device of dynamic shadow fusion.Fig. 2 is that a kind of that the embodiment of the present invention two provides calculates the static shade of illumination pattern and the apparatus module figure of dynamic shadow fusion.As shown in Figure 2, described device comprises the first computing module 210 and the second computing module 220;
First computing module 210, accounts for the ratio of shade corresponding circle of sensation for calculating dynamic shadow;
Described first computing module 210 specifically for according to following formula, calculates the ratio that dynamic shadow accounts for shade corresponding circle of sensation:
F＝(Ds-Xd)/(De-Ds)，
Wherein, Ds is the distance of starting pixels point to camera of shade corresponding circle of sensation, and De is the distance of end pixel point to camera of shade corresponding circle of sensation, Xd be in shade corresponding circle of sensation arbitrary pixel to the distance of camera.
Second computing module 220, for the color value according to each pixel in described ratio computational shadowgraph corresponding circle of sensation.
Described second computing module 220 also comprises color calculating sub module and double counting submodule;
Color calculating sub module, for according to following formula, the color value of arbitrary pixel in computational shadowgraph corresponding circle of sensation:
R＝Xa*(1-F)+Xb*F
Wherein, Xa is the color value of this pixel in static echo, and Xb is the color value of this pixel in dynamic shadow figure;
Double counting submodule, for repeating above-mentioned calculating, obtains the color value of each pixel in shade corresponding circle of sensation.
Described device also comprises echo module, for storing the color value of pixel each in shade corresponding circle of sensation.
The embodiment of the present invention provide a kind of calculate illumination pattern static shade and the device that merges of dynamic shadow, by the first computing module 210 and the second computing module 220, realize static shade and dynamic shadow fusion, make the same area in scene can use two kinds of shade account forms simultaneously, while not increasing computing cost, object at a distance also can have shade, and the fidelity that improve game picture improves the fidelity of game picture.
The embodiment of the present invention provide a kind of calculate illumination pattern static shade and the device that merges of dynamic shadow can perform that the embodiment of the present invention one provides a kind of calculate illumination pattern static shade and the method that merges of dynamic shadow, possess the corresponding functional module of manner of execution and beneficial effect.
Note, above are only preferred embodiment of the present invention and institute's application technology principle.Skilled person can understand, and the invention is not restricted to specific embodiment described here, concerning carrying out various obvious change skilled person, readjust and substitute and can not depart from protection scope of the present invention.Therefore, although be described in further detail invention has been by above embodiment, the present invention is not limited only to above embodiment, when not departing from the present invention's design, can also comprise other Equivalent embodiments more, and scope of the present invention is determined by appended right.
Claims (8)
1. calculate the static shade of illumination pattern and a method for dynamic shadow fusion, it is characterized in that, comprising:
Calculate the ratio that dynamic shadow accounts for shade corresponding circle of sensation, wherein, shade corresponding circle of sensation comprises static shade and dynamic shadow;
According to the color value of each pixel in described ratio computational shadowgraph corresponding circle of sensation.
2. method according to claim 1, is characterized in that, described calculating dynamic shadow accounts for the ratio of shade corresponding circle of sensation, and wherein, shade corresponding circle of sensation comprises static shade and dynamic shadow specifically comprises:
According to following formula, calculate the ratio that dynamic shadow accounts for shade corresponding circle of sensation:
F＝(Ds-Xd)/(De-Ds)，
Wherein, Ds is the distance of starting pixels point to camera of shade corresponding circle of sensation, and De is the distance of end pixel point to camera of shade corresponding circle of sensation, Xd be in shade corresponding circle of sensation arbitrary pixel to the distance of camera.
3. method according to claim 1, is characterized in that, describedly specifically comprises according to the color value of each pixel in described ratio computational shadowgraph corresponding circle of sensation:
According to following formula, the color value of arbitrary pixel in computational shadowgraph corresponding circle of sensation:
R＝Xa*(1-F)+Xb*F
Wherein, Xa is the color value of this pixel in static echo, and Xb is the color value of this pixel in dynamic shadow figure;
Repeat above-mentioned calculating, obtain the color value of each pixel in shade corresponding circle of sensation.
4., according to the arbitrary described method of claim 1-3, it is characterized in that, after according to the color value of each pixel in described ratio computational shadowgraph corresponding circle of sensation, also comprise:
In the shade corresponding circle of sensation that employing calculates, the color value of each pixel, arranges described shade corresponding circle of sensation, obtains the echo after merging.
5. calculate the static shade of illumination pattern and a device for dynamic shadow fusion, it is characterized in that, comprising:
First computing module, accounts for the ratio of shade corresponding circle of sensation for calculating dynamic shadow;
Second computing module, for the color value according to each pixel in described ratio computational shadowgraph corresponding circle of sensation.
6. device according to claim 5, is characterized in that, described first computing module specifically for:
According to following formula, calculate the ratio that dynamic shadow accounts for shade corresponding circle of sensation:
F＝(Ds-Xd)/(De-Ds)，
Wherein, Ds is the distance of starting pixels point to camera of shade corresponding circle of sensation, and De is the distance of end pixel point to camera of shade corresponding circle of sensation, Xd be in shade corresponding circle of sensation arbitrary pixel to the distance of camera.
7. device according to claim 5, is characterized in that, described second computing module also comprises color calculating sub module and double counting submodule;
Color calculating sub module, for according to following formula, the color value of arbitrary pixel in computational shadowgraph corresponding circle of sensation:
R＝Xa*(1-F)+Xb*F
Wherein, Xa is the color value of this pixel in static echo, and Xb is the color value of this pixel in dynamic shadow figure;
Double counting submodule, for repeating above-mentioned calculating, obtains the color value of each pixel in shade corresponding circle of sensation.
8. device according to claim 5, is characterized in that, described device also comprises:
Echo module, for storing the color value of pixel each in shade corresponding circle of sensation.
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| CN105912234A (en) * | 2016-04-06 | 2016-08-31 | 腾讯科技（深圳）有限公司 | Virtual scene interaction method and device |
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| CN108520551B (en) * | 2018-03-30 | 2022-02-22 | 苏州蜗牛数字科技股份有限公司 | Method for realizing dynamic illumination of light map, storage medium and computing equipment |
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| CN110517346A (en) * | 2019-08-30 | 2019-11-29 | 腾讯科技（深圳）有限公司 | Methods of exhibiting, device, computer equipment and the storage medium at virtual environment interface |
| CN110517346B (en) * | 2019-08-30 | 2021-06-18 | 腾讯科技（深圳）有限公司 | Virtual environment interface display method and device, computer equipment and storage medium |
| CN111784817A (en) * | 2020-06-30 | 2020-10-16 | 完美世界(北京)软件科技发展有限公司 | Shadow display method and device, storage medium and electronic device |
| CN111784817B (en) * | 2020-06-30 | 2024-03-29 | 完美世界(北京)软件科技发展有限公司 | Shadow display method and device, storage medium and electronic device |
| CN113570697A (en) * | 2021-09-24 | 2021-10-29 | 深圳易帆互动科技有限公司 | Shadow rendering method and device based on model prebaking and readable storage medium |
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