Scanline effects: Difference between revisions
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[[File:kof98rli.gif|frame|[[The_King_of_Fighters_%2798_-_The_Slugfest]] moves the fist sprites horizontally in its intro to create a "bad sync" effect. Looks like it's animated with a multiplied constants table ?]] | [[File:kof98rli.gif|frame|[[The_King_of_Fighters_%2798_-_The_Slugfest|King of Fighters '98]] moves the fist sprites horizontally in its intro to create a "bad sync" effect. Looks like it's animated with a multiplied constants table ?]] | ||
[[File:Sengoku2persp.png|frame|[[Sengoku 2]] changes the shrinking and the position of a scrolling sprite block in its intro to create a mirror and perspective effect.]] | [[File:Sengoku2persp.png|frame|[[Sengoku 2]] changes the shrinking and the position of a scrolling sprite block in its intro to create a mirror and perspective effect.]] | ||
Revision as of 23:02, 17 January 2016
Scanline effects are special tricks using the timer interrupt to distort sprites by updating their coordinates or shrink values mid-screen.
These effects can be very CPU consuming as they can be triggered at tight intervals during active display. Consequently, they may have to use tables of precomputed values (constants, or calculated during the VBlank) to be applied fast enough.
Neo Turf Masters and Riding Hero heavily rely on this effect to render the playing field.