Dynamic scene real time double face refraction drafting method based on image mapping space

Abstract

The invention relates to a method for drawing a dynamic scene through double-face refraction in real time based on an image mapping space, which comprises the following steps: using the center of a transparent object as a viewpoint to draw surface color information and depth information of other circumferential objects except the transparent object to the veins of a cubic image; using the center of the transparent object as the viewpoint to draw the distances between the external surface normal line and the center of the transparent object and between the surface vertex and the center of the transparent object to the veins of one cubic image; generating a first refraction on the surface of the transparent object, calculating the direction of the refracted ray of the time, and using the veins of the cubic image as an input to approximately calculate the position of an intersection point of the light of the next time and the surface of the transparent object through a bisearch mode on an image hardware; if a total reflection happens, searching the next intersection point, and if the total reflection does not happen, performing a second time refraction at the intersection point so that the light passes out of the transparent body; and calculating the refraction of the refracted ray to other circumferential objects on the image hardware, and finding out a first lighting color of the surface position of an object intersecting with the refracted ray along the refracted ray, which serves as a screen pixel color corresponding to the refracted ray. The method can satisfy the real-time requirement on frame rate, and can obtain quite vivid light refraction drawing effect simultaneously.

Description

technical field [0001] The invention relates to a dynamic scene real-time double-sided refraction drawing method based on image mapping space, which is mainly used for computer three-dimensional scene drawing. Background technique [0002] Refraction is a common physical phenomenon in daily life. For example, light will be refracted when propagating in materials such as water, glass, ice cubes, and diamonds. Real-time realistic rendering of refraction phenomena is of great significance to enhance the immersion of virtual scenes, so this is also a research hotspot in the field of real-time realistic rendering of 3D graphics. When light enters from the front surface of a transparent object, it first refracts once at the front surface, and then refracts a second time when the light exits from the back surface of the object, so it is necessary to realistically draw the refraction of light passing through the transparent object The phenomenon must accurately calculate the double...

AI Technical Summary

Problems solved by technology

At present, these methods require precomputation. However, in many applications such as computer games and virtual roaming systems, objects in the scene are movable or deformable, so precomputation will also fail in these applications.

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