Drawing method for full-frequency mutual reflection illumination effects in scene

An inter-reflection, full-frequency technology, applied in the field of photorealistic graphics rendering, can solve the problems of inability to uniformly deal with limitations, difficult to deal with high-gloss materials, increased calculation time, etc., to achieve high efficiency, accurate results, and the rendering process. quick effect

Active Publication Date: 2014-01-01
TSINGHUA UNIV
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Problems solved by technology

However, the micro-rendering technology restricts the reflective surface in the scene to be a diffuse reflection or a material with a low-frequency BRDF, which has great limitations.
[0006] To sum up, existing technologies for drawing interreflective lighting effects usually assume that the reflection characteristics of object materials in the scene are limited to a certain frequency range. For example, algorithms based on virtual point light sources can better handle diffuse reflection materials. It is difficult to deal with high-gloss materials; the photon mapping method is more efficient when

Method used

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  • Drawing method for full-frequency mutual reflection illumination effects in scene
  • Drawing method for full-frequency mutual reflection illumination effects in scene
  • Drawing method for full-frequency mutual reflection illumination effects in scene

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Embodiment 1

[0051] see Figure 1 to Figure 3 , the present invention provides a rendering method for full-frequency interreflection lighting effects in a scene, and its specific implementation process is as follows.

[0052] In step S101, a preset scene is read in, and a scene model of the preset scene is generated. In this embodiment, the scene model is formed by combining multiple sub-models. After judging, it is determined that not all the sub-models have triangle faces less than the first threshold, so a hierarchical structure needs to be established for the scene model. In this embodiment, the establishment method of the hierarchical structure of the scene model is specifically as follows figure 2 shown.

[0053] In step S1011, a binary tree is established based on the scene model, wherein the leaf nodes of the binary tree are individual triangle faces, the intermediate nodes of the binary tree are a collection of triangle faces, and the intermediate nodes include the intermediat...

Embodiment 2 and Embodiment 3

[0078] Example 2 and Example 3: Please refer to Figure 1-Figure 5 , compared with Embodiment 1, the order of calculating the direct lighting result of each sub-model (step S102 ) and calculating the mutual reflection lighting result (step S103 - step S106 ) is not in any order. either as Figure 4 Subsequent executions, as shown, can also be performed as Figure 5 The synchronous execution shown. Those skilled in the art should understand that step S102 and any step in steps S103-S106 are executed in no particular order.

Embodiment 4

[0080] see Figure 6 , the present invention provides a rendering method for full-frequency interreflection lighting effects in a scene, and its specific implementation process is as follows.

[0081] In step S501, a preset scene is read in, and a scene model of the preset scene is generated. In this embodiment, the scene model is formed by combining multiple sub-models. After judgment, it is determined that the number of triangles of all the sub-models is less than the first threshold, so there is no need to establish a hierarchical structure for the scene model. When the number of triangular faces of all sub-models is less than the first threshold, the rendering time required to obtain the same rendering result without establishing a hierarchical structure is equivalent to that required to establish a hierarchical structure, and the calculation steps are more concise.

[0082] In step S502, calculate the direct lighting results of each sub-model in the preset scene accordi...

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Abstract

The invention discloses a drawing method for full-frequency mutual reflection illumination effects in a scene. The drawing method includes the steps that a preset scene is read in, a scene model of the preset scene is generated and comprises multiple submodels, and as for each submodel, the direct illumination effect of each submodel and the mutual reflection illumination effect of each rendering point of each submodel in the preset scene are calculated; the final rendering result is obtained through addition of the direct illumination effects and the mutual reflection illumination effects.

Description

technical field [0001] The invention belongs to the technical field of realistic graphics rendering, and relates to a method for rendering full-frequency inter-reflective lighting effects in a scene, and more specifically, relates to a practical technology for efficiently rendering full-frequency inter-reflective lighting effects by using an analytical model. Background technique [0002] Rendering interreflective lighting effects is a common problem in the field of photorealistic rendering. The so-called mutual reflection is the phenomenon that the light emitted by the light source is reflected by one surface and then illuminates the other surface. For the rendering results that consider the inter-reflection lighting effect, the realism is greatly improved compared with the rendering results that only have the direct lighting effect, but the rendering of the inter-reflection effect often requires a large calculation cost. The technical background of the present invention j...

Claims

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Application Information

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IPC IPC(8): G06T15/50
Inventor 徐昆曹炎培马里千胡事民
Owner TSINGHUA UNIV
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