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DLL to Rotate an RGSS Bitmap... Need a hand from C++ folks!

BMM_Archive · July 16, 2026

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Preserved forum archive. This topic stores the original first post and locally mirrored RPG Maker Web attachments when available. It is posted by the BMMPlay archive account, not by the original creator.

Original Source

  • Original title: DLL to Rotate an RGSS Bitmap... Need a hand from C++ folks!
  • Original author: Heretic86
  • Original date: June 23, 2016
  • Source thread: https://forums.rpgmakerweb.com/threads/dll-to-rotate-an-rgss-bitmap-need-a-hand-from-c-folks.64034/
  • Source forum path: Game Development Engines > Ruby Game System (RGSS) Scripts > Learning Ruby and RGSSx

Summary

First off, I suck at C++ and have had some success in making a DLL but I dont know enough to make the rotated images look clean!  I have a ton of noise when the bitmap rotates!  I figure someone here will be more familiar with C++ and graphics so it looks way better! { "lightbox_close": "Close", "lightbox_next": "Next",

Archived First Post

First off, I suck at C++ and have had some success in making a DLL but I dont know enough to make the rotated images look clean!  I have a ton of noise when the bitmap rotates!  I figure someone here will be more familiar with C++ and graphics so it looks way better!


LightNoise.jpg



DEMO and Sourcecode (Visual C++)


http://downloads.chaos-project.com/heretic86/LightDLL.zip


It compiles and works, sort of.  Game crashes if it is rotated to exactly 270 degrees, not sure why, division by zero?


And yes, for the record, i do know that sprites can use angles, but the trouble is in the RPG::Cache, all images stored there are non rotated versions.  I need the bitmap to be rotated for stretch_blt for another script Im working on...


Any advice?

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Referenced Images / Attachments

LightNoise.jpg
LightNoise.jpg
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