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rendertarget_noclear(3) Arcan Lua API rendertarget_noclear(3) NAME rendertarget_noclear - Enable / Disable clearing a rendertarget before a renderpass. SYNOPSIS success rendertarget_noclear( vid, noclear ) DESCRIPTION By default, each pass for a rendertarget begins by clearing the buffer that will be drawn to. This may waste memory bandwidth if we know that the en- tire rendertarget will be populated with the objects that are to be drawn. rendertarget_noclear is used to change this behavior by setting a true value to a vid that is connected to a rendertarget. NOTES 1 Setting WORLDID as vid will change the clear behavior for the stan- dard output rendertarget. 2 If the background is not actually covered by valid VID s, you will leave trails of previous frames behind, as in the MAIN example be- low. EXAMPLE function rendertarget_noclear0() rendertarget_noclear(WORLDID, true); a = color_surface(64, 64, 255, 0, 0, 0); show_image(a); move_image(a, 128, 128, 10); end MISUSE function rendertarget_noclear0() rendertarget_noclear(BADID, "potatoe"); end targetcontrol August 2026 rendertarget_noclear(3)
NAME | SYNOPSIS | DESCRIPTION | NOTES | EXAMPLE | MISUSE
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