Render3d22d

(read as "render 3D to 2D")

what it is

Impatient? See it in action!

• Render3d22d is a proof of concept to try out if it is possible, to render 3D content to a 2D HTML canvas, when no hardware acceleration is available.
• Although it was developed to run in web browsers, it was not implemented in JavaScript but in plain C.
• Using the amazing emscripten compiler suite Render3d22d was compiled to strongly typed, optimized Javascript conforming to asm.js.
• Because the native html5.h of emscripten is meant to develop fast WebGL applications, Render3d22d is using emscriptens SDL support, which you would typically use to port old SDL applications.
• SDL support seems to be the only possible way to get an unaccelerated 2D html canvas, but it offers the possibility to develop (and debug) a native C application, whilst be able to compile to HTML/JS all the time.
• To do some of the grunt work, Render3d22d relies on parts of coreh/gl-matrix.c.

this respository contains

• the C source code
• a binary for linux-x64 (you need to have libSDL1.2 and libSDL_image installed)
• a binary for win32 and support libs (just checkout the whole directory)
• the HTML/JS files used for the live demo

how to compile

No, there is no makefile! (if anyone is willing to write one, I'll include it)

SDL based binary (provided you have dev packages for libSDL and libSDL_image installed):

gcc -O3 -Wall -Werror -pedantic-errors -std=c99 -D_GNU_SOURCE=1 -D_REENTRANT -I/usr/include/SDL \
render.c mat?.c quat.c vec?.c -lSDL -lSDL_image -lm -o render

Compile to HTML/JS unsing the Emscripten SDK:

emcc -O3 -Wall -Werror -pedantic-errors -std=c99 \
-D_GNU_SOURCE=1 -D_REENTRANT -s TOTAL_MEMORY=32000000 \
render.c mat?.c quat.c vec?.c -o index.html \
--use-preload-plugins --preload-file "./color_map_2048.jpg"