Apparatus for generating a visual display

Details Apparatus for generating a visual display Apparatus for generating a visual display

G - Physics

09

G

G09G 5/36 (2006.01) G09B 9/30 (2006.01) G06T 15/50 (2006.01)

Patent

CA 2044804

Abstract (Fig. 3) Apparatus for generating a visual display In a visual display system for a simulator, a pattern processor (20) for applying surface detail modulation to the uniform intensity values output from the simulator memory database for polygon surfaces has each tile of modulation values stored in a respective tile store (46) of eight lookup and weight units (30-37). Four different modulation values are looked up from the four units (30 to 33 or 34 to 37) of two groups and are weighted, and then summed by a respective summing circuit (28 or 29) before blending (22) and application to the modulator (11). A microinterpolation limit (39) associated with the polygon surface allows the weighting factors to bias the summing circuit outputs towards one of the respective four looked up values, thereby enhancing step-like intensity changes within the polygon. - 27 -

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