Bisqwit's Portal Rendering Engine

Bisqwit's Portal Rendering Engine, written in C, updated to use SDL 2 instead of SDL 1.2 and C99 standard. The code is featured and talked about in his video on making a Doom style pseudo-3D engine All files and credit goes to Bisqwit

Modifications

• Included inttypes.h header file.

#include <inttypes.h>

• Included SDL2/SDL.h header file instead of SDL.h

#include <SDL2/SDL.h> // #include <SDL.h>

• Changed unsigned integer types to uint32_t.

//static unsigned NumSectors = 0;
static uint32_t NumSectors = 0;

• Changed int integers to int32_t.

// int n, m, NumVertices = 0;
int32_t n, m, NumVertices = 0;

• Enforced const-correctness where possible and necessary.
• Applied the restrict keyword to pointers that didn't alias similar data.

const struct sector *const restrict sect = &sectors[player.sector];
const struct xy *const restrict vert = sect->vertex;

• Changed certain SDL-oriented functions to use their SDL2 counterparts.
• Changed certain SDL code to SDL2 equivalent code.

//SDL_Flip(surface); 
SDL_UpdateTexture(texture, NULL, surface->pixels, surface->pitch);
SDL_RenderClear(renderer);
SDL_RenderCopy(renderer, texture, NULL, NULL);
SDL_RenderPresent(renderer);

This repository is only for the updated source code. The map files and textures are available at Bisqwit's personal site

How to Build

To build, you need the SDL2 sdk, a C99 or C11 compliant compiler, and to include the C standard library math library.

the build code I used for quick build: gcc -Wall -Wextra -std=c99 -s -O2 prender.c -o bisqwitRT_engine -lSDL2 -lm