Stereographic Selection Marquee Rendering via Unified 3D Volume
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Solution Overview
Problem
Conventional stereographic rendering techniques fail to accurately display a selection marquee in three-dimensional scenes, as the vertical edges of the selection marquee do not match in the left and right images, making it difficult to select areas in stereoscopic content.
Innovation Solution
A method is developed to generate a selection volume from a mono viewpoint projection, transforming three-dimensional scene fragments inside this volume to two-dimensional coordinates, and shading them with a selection attribute for both left and right eye views, ensuring accurate representation of the selection marquee in stereographic content.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If each view defines its own selection marquee volume in its clipping space, then the selection process can be performed independently in each eye view, but the vertical edges of the shape do not match in the right and left images
Solution Approach 1:
The patent merges the selection marquee definition from both left and right eye views into a single unified selection volume in three-dimensional space. This unified volume is then used to consistently select fragments in both views, ensuring that the selection boundaries match vertically across the stereoscopic image while maintaining independent processing capability for each view.
Solution Approach 2:
The patent transitions from defining selection marquees in two-dimensional clipping space for each view to defining a three-dimensional selection volume that spans both views. By adding the depth dimension and unifying the selection criteria across views, the system achieves consistent vertical edge matching while preserving independent view processing.
2Ease of manufacture
If a selection marquee is drawn as a two-dimensional shape in window space, then the selection process is simple in monographic rendering, but the same solution does not work in stereographic rendering
Solution Approach 1:
The patent extends the two-dimensional selection marquee concept into three-dimensional space by creating a selection volume that encompasses both left and right eye views. This allows the simple two-dimensional drawing approach to be adapted for stereographic rendering by adding depth information and unified spatial constraints across both views.
Solution Approach 2:
The patent creates a universal selection volume that functions for both left and right eye views simultaneously. This single three-dimensional selection structure replaces the need for separate two-dimensional selection definitions in each view, providing a unified solution that works for stereographic rendering while maintaining the simplicity of the original two-dimensional approach.
Data Source
AI summary
A technique for stereographic display of a selection marquee in a scene includes receiving the selection marquee in a two-dimensional viewpoint at a near plane of the scene. A selection volume is generated from which the fragments of a scene associated with the selection marquee are determined. A two-dimensional stereoscopic representation of the three-dimensional scene, including the selection marquee at the associated fragments, may then be rendered.