.gitignore

@@ -1,3 +1 @@
-.cache
-build_dir
 compile_commands.json

.gitmodules

@@ -1,4 +0,0 @@
-[submodule "include/c_cpp_aliases"]
-	path = include/c_cpp_aliases
-	url = https://git.thewizardapprentice.com/abdelrahman/c-cpp-aliases.git
-	branch = main

build

@@ -1,3 +0,0 @@
-#!/bin/bash
-
-bear -- ./compile "$@"

compile

@@ -1,16 +0,0 @@
-#!/bin/bash
-
-CC=clang
-CFLAGS="-g -Wall -Werror -pedantic -Iinclude $(pkg-config --cflags sdl2)"
-LIBS="$(pkg-config --libs sdl2)"
-
-RAYTRACER_SRC="src/window/*.c \
-	src/raytracer/*.c \
-"
-
-BUILD=build_dir
-RAYTRACER_OUT="$BUILD/raytracer"
-
-mkdir -p $BUILD
-
-(set -x ; $CC $CFLAGS $LIBS $RAYTRACER_SRC -o $RAYTRACER_OUT)

include/c_cpp_aliases

@@ -1 +0,0 @@
-Subproject commit f95f3aa499910286876c1f2cdceea8146ebcf7b1

include/window/window.h

@@ -1,31 +0,0 @@
-#ifndef WINDOW_H
-#define WINDOW_H
-
-#include "c_cpp_aliases/aliases.h"
-#include <SDL2/SDL_video.h>
-#include <stdbool.h>
-
-typedef struct {
-  u8 r;
-  u8 g;
-  u8 b;
-  u8 a;
-} colour_t;
-
-typedef struct {
-  u64 width;
-  u64 height;
-  const char *title;
-  SDL_Window *window;
-  SDL_Surface *front_buffer;
-  SDL_Surface *back_buffer;
-} window_t;
-
-bool init_window(window_t *wnd, u64 width, u64 height, const char *title);
-void close_window(window_t *wnd);
-
-void clear_window(window_t *wnd, colour_t colour);
-void set_pixel(window_t *wnd, f32 x, f32 y, colour_t colour);
-void swap_buffers(window_t *wnd);
-
-#endif // !WINDOW_H

run

@@ -1,23 +0,0 @@
-#!/bin/bash
-
-USAGE="Usage: run (raytracer | rasteriser)"
-
-if [[ $# == 0 ]]; then
-	echo $USAGE
-	exit 1
-fi
-
-while [[ $# -gt 0 ]]; do
-  case $1 in
-    raytracer)
-      RENDERER="raytracer"
-      shift # past argument
-      ;;
-    -*|--*|*)
-			echo $USAGE
-      exit 1
-      ;;
-  esac
-done
-
-./build_dir/$RENDERER

src/raytracer/main.c

@@ -1,37 +0,0 @@
-#include "SDL_events.h"
-#include "c_cpp_aliases/aliases.h"
-#include "window/window.h"
-#include <stdbool.h>
-#include <stdio.h>
-#include <stdlib.h>
-
-int main(int argc, char *argv[]) {
-  colour_t bg = (colour_t){.r = 128, .g = 128, .b = 128, .a = 255};
-
-  window_t window = {0};
-
-  if (!init_window(&window, 1000, 800, "CG From Scratch")) {
-    return EXIT_FAILURE;
-  }
-
-  bool running = true;
-  SDL_Event event = {0};
-
-  while (running) {
-    while (SDL_PollEvent(&event)) {
-      switch (event.type) {
-      case SDL_QUIT:
-        running = false;
-        break;
-      }
-    }
-
-    clear_window(&window, bg);
-
-    swap_buffers(&window);
-  }
-
-  close_window(&window);
-
-  return EXIT_SUCCESS;
-}

src/window/window.c

@@ -1,144 +0,0 @@
-#include "window/window.h"
-#include "c_cpp_aliases/aliases.h"
-#include <SDL2/SDL.h>
-#include <SDL2/SDL_error.h>
-#include <SDL2/SDL_pixels.h>
-#include <SDL2/SDL_surface.h>
-#include <stdbool.h>
-#include <stdio.h>
-
-#define NORMALISED_MIN -1.0f
-#define NORMALISED_MAX 1.0f
-
-u32 colour_to_u32(colour_t colour);
-u32 index_from_coordinates(window_t *wnd, u32 x, u32 y);
-i32 denormalise(f32 value, u32 max);
-void set_screen_pixel(window_t *wnd, u32 x, u32 y, colour_t colour);
-
-bool init_window(window_t *wnd, u64 width, u64 height, const char *title) {
-  if (SDL_Init(SDL_INIT_EVERYTHING) != 0) {
-    printf("Failed to initialise SDL: %s\n", SDL_GetError());
-
-    return false;
-  }
-
-  wnd->window = SDL_CreateWindow(title, SDL_WINDOWPOS_CENTERED,
-                                 SDL_WINDOWPOS_CENTERED, width, height, 0);
-  if (!(wnd->window)) {
-    printf("Failed to create window: %s\n", SDL_GetError());
-
-    close_window(wnd);
-
-    return false;
-  }
-
-  wnd->front_buffer = SDL_GetWindowSurface(wnd->window);
-  if (!(wnd->front_buffer)) {
-    printf("Failed to get front buffer: %s\n", SDL_GetError());
-
-    close_window(wnd);
-
-    return false;
-  }
-
-  wnd->back_buffer = SDL_CreateRGBSurfaceWithFormat(0, width, height, 32,
-                                                    SDL_PIXELFORMAT_ABGR32);
-  if (!(wnd->back_buffer)) {
-    printf("Failed to create back buffer: %s\n", SDL_GetError());
-
-    close_window(wnd);
-
-    return false;
-  }
-
-  wnd->width = width;
-  wnd->height = height;
-  wnd->title = title;
-
-  return true;
-}
-
-void close_window(window_t *wnd) {
-  if (wnd) {
-    wnd->width = 0;
-    wnd->height = 0;
-    wnd->title = "";
-
-    if (wnd->window) {
-      SDL_DestroyWindow(wnd->window);
-
-      wnd->window = NULL;
-    }
-
-    if (wnd->back_buffer) {
-      SDL_FreeSurface(wnd->back_buffer);
-
-      wnd->back_buffer = NULL;
-    }
-  }
-
-  SDL_Quit();
-}
-
-void clear_window(window_t *wnd, colour_t colour) {
-  SDL_LockSurface(wnd->back_buffer);
-
-  u32 c = colour_to_u32(colour);
-
-  u32 *pixels = (u32 *)(wnd->back_buffer->pixels);
-  u32 count = wnd->back_buffer->w * wnd->back_buffer->h;
-
-  for (u32 i = 0; i < count; ++i) {
-    pixels[i] = c;
-  }
-
-  SDL_UnlockSurface(wnd->back_buffer);
-}
-
-void set_pixel(window_t *wnd, f32 x, f32 y, colour_t colour) {
-  i32 screen_x = denormalise(x, wnd->width);
-  i32 screen_y = denormalise(-y, wnd->height);
-
-  if (screen_x < 0 || screen_y < 0) {
-    return;
-  }
-
-  SDL_LockSurface(wnd->back_buffer);
-
-  set_screen_pixel(wnd, screen_x, screen_y, colour);
-
-  SDL_UnlockSurface(wnd->back_buffer);
-}
-
-void swap_buffers(window_t *wnd) {
-  SDL_BlitSurface(wnd->back_buffer, NULL, wnd->front_buffer, NULL);
-
-  SDL_UpdateWindowSurface(wnd->window);
-}
-
-u32 colour_to_u32(colour_t colour) {
-  return ((u32)(colour.r) << 24) | ((u32)(colour.g) << 16) |
-         ((u32)(colour.b) << 8) | (u32)(colour.a);
-}
-
-u32 index_from_coordinates(window_t *wnd, u32 x, u32 y) {
-  return y * wnd->width + x;
-}
-
-i32 denormalise(f32 value, u32 max) {
-  if (max == 0 || value < NORMALISED_MIN || value >= NORMALISED_MAX) {
-    return -1;
-  }
-
-  return (i32)(((value - NORMALISED_MIN) * max) /
-               (NORMALISED_MAX - NORMALISED_MIN));
-}
-
-void set_screen_pixel(window_t *wnd, u32 x, u32 y, colour_t colour) {
-  u32 index = index_from_coordinates(wnd, x, y);
-  u32 c = colour_to_u32(colour);
-
-  u32 *pixels = (u32 *)(wnd->back_buffer->pixels);
-
-  pixels[index] = c;
-}