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-rw-r--r--.gitignore1
-rwxr-xr-xbuild.sh22
-rw-r--r--src/main.c193
-rw-r--r--src/shell.html82
4 files changed, 298 insertions, 0 deletions
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..6dd29b7
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+bin/ \ No newline at end of file
diff --git a/build.sh b/build.sh
new file mode 100755
index 0000000..4b597bb
--- /dev/null
+++ b/build.sh
@@ -0,0 +1,22 @@
+#!/bin/sh
+
+cd ${0%/*} # go to project root
+
+FLAGS="-Wall -Wextra -g -pedantic"
+RAYLIB_FLAGS="-lraylib -lm -lpthread -lGL -ldl -lrt -lX11"
+RAYLIB_SRC="/usr/local/src/raylib/src"
+
+set -xe
+
+if ! [[ $1 == "web" ]] &> /dev/null; then
+ gcc -o bin/main src/main.c $FLAGS $RAYLIB_FLAGS
+else
+ source emsdk_env.sh
+
+ emcc -o bin/proc-gen.html src/main.c \
+ $FLAGS -DPLATFORM_WEB -DRAYLIB_SRC="\"$RAYLIB_SRC/raylib.h\"" \
+ $RAYLIB_SRC/libraylib.a \
+ -I$RAYLIB_SRC/raylib.h \
+ -s USE_GLFW=3 -s ASYNCIFY \
+ --shell-file src/shell.html
+fi
diff --git a/src/main.c b/src/main.c
new file mode 100644
index 0000000..6119bd6
--- /dev/null
+++ b/src/main.c
@@ -0,0 +1,193 @@
+#include <stdio.h>
+#include <stdint.h>
+#include <stdbool.h>
+
+#ifdef PLATFORM_WEB
+ #include RAYLIB_SRC
+#else
+ #include <raylib.h>
+#endif
+
+typedef uint32_t u32;
+
+#define MOONS_CAP 4
+#define PLANETS_CAP 10
+
+int SW = 1200;
+int SH = 800;
+
+#define OFF_Y (7*SH/9)
+
+int sector_len = 16;
+u32 seed = 0;
+
+typedef struct {
+ int diameter;
+ u32 color;
+ bool ring;
+ int moons[MOONS_CAP];
+} planet_t;
+
+typedef struct {
+ int diameter;
+ u32 color;
+} star_t;
+
+star_t star_gen();
+void planets_gen(planet_t *planets);
+
+uint32_t lehmer();
+int rnd_int(int max, int min);
+
+#define HEX_TO_COL(col) {((col) >> 16) & 0xFF, \
+ ((col) >> 8) & 0xFF, \
+ (col) & 0xFF, 0xFF}
+
+int main(void)
+{
+ InitWindow(SW, SH, "Procedural Generation");
+ SetTargetFPS(30);
+ SetWindowState(FLAG_WINDOW_RESIZABLE);
+
+ int offset_x = 0;
+ int offset_y = 0;
+
+ while (!WindowShouldClose())
+ {
+ SW = GetScreenWidth();
+ SH = GetScreenHeight();
+
+ int sectors_x = SW/sector_len;
+ int sectors_y = SH/sector_len;
+
+ sector_len += (int)GetMouseWheelMove();
+ if(sector_len <= 0) sector_len = 1;
+
+ if(IsKeyDown(KEY_W)) offset_y -= 1;
+ if(IsKeyDown(KEY_A)) offset_x -= 1;
+ if(IsKeyDown(KEY_S)) offset_y += 1;
+ if(IsKeyDown(KEY_D)) offset_x += 1;
+
+ static bool extra_info = false;
+ star_t info_star; planet_t info_planets[PLANETS_CAP];
+ if(IsMouseButtonPressed(MOUSE_BUTTON_LEFT)) extra_info = false;
+
+ BeginDrawing();
+ ClearBackground(BLACK);
+
+ // gen each sector
+ for(int i = 0; i < sectors_x; i++)
+ for(int j = 0; j < sectors_y; j++) {
+ seed = ((i+offset_x) & 0xFFFF) << 16 | ((j+offset_y) & 0xFFFF);
+ if(rnd_int(25, 0) != 0) continue;
+
+ star_t star = star_gen();
+
+ int x = i * sector_len + (sector_len/2);
+ int y = j * sector_len + (sector_len/2);
+ float diam = (float)star.diameter*sector_len/96;
+
+ DrawCircle(x, y, diam, (Color)HEX_TO_COL(star.color));
+
+ // hover over star
+ if(GetMouseX()/sector_len == i && GetMouseY()/sector_len == j) {
+ DrawCircleLines(x, y, diam + 4, (Color)HEX_TO_COL(star.color));
+
+ // click on star
+ if(IsMouseButtonPressed(MOUSE_BUTTON_LEFT)) {
+ extra_info = true;
+ info_star = star;
+ planets_gen(info_planets);
+ }
+ }
+ }
+
+ // extra info rec
+ if(extra_info) {
+ DrawRectangle(0, 2*SH/3, SW, SH/3, BLUE);
+
+ // draw star
+ int body_offset = 50 + info_star.diameter;
+ DrawCircle(body_offset, OFF_Y, info_star.diameter,
+ (Color)HEX_TO_COL(info_star.color));
+ body_offset += 90 + info_star.diameter;
+
+ // draw planets
+ for(int i = 0; i < PLANETS_CAP; i++) {
+ if(info_planets[i].diameter == 0) continue;
+
+ body_offset += info_planets[i].diameter;
+ DrawCircle(body_offset, OFF_Y, info_planets[i].diameter,
+ (Color)HEX_TO_COL(info_planets[i].color));
+
+ if(info_planets[i].ring) {
+ DrawCircleLines(body_offset, OFF_Y,
+ info_planets[i].diameter + 6,
+ (Color)HEX_TO_COL(info_planets[i].color));
+ DrawCircleLines(body_offset, OFF_Y,
+ info_planets[i].diameter + 7,
+ (Color)HEX_TO_COL(info_planets[i].color));
+ }
+
+ // draw moons
+ int y_off = info_planets[i].diameter + 10;
+ for(int j = 0; j < MOONS_CAP; j++) {
+ if(info_planets[i].moons[j] == 0) continue;
+
+ y_off += info_planets[i].moons[j];
+ DrawCircle(body_offset, OFF_Y + y_off,
+ info_planets[i].moons[j], GRAY);
+ y_off += 10 + info_planets[i].moons[j];
+ }
+
+ body_offset += 50 + info_planets[i].diameter;
+ }
+ }
+
+ DrawFPS(10, 10);
+ EndDrawing();
+ }
+ CloseWindow();
+}
+
+star_t star_gen()
+{
+ star_t star;
+ star.diameter = rnd_int(80, 20);
+ star.color = rnd_int(0xFFFFFF, 0);
+ return star;
+}
+
+void planets_gen(planet_t *planets)
+{
+ int n = rnd_int(PLANETS_CAP, 0);
+ for(int i = 0; i < PLANETS_CAP; i++) {
+ if(i >= n) {
+ planets[i].diameter = 0;
+ continue;
+ }
+
+ planets[i].diameter = rnd_int(40, 10);
+ planets[i].color = rnd_int(0xFFFFFF, 0);
+ planets[i].ring = (rnd_int(5, 0) == 1);
+
+ for(int j = 0; j < MOONS_CAP; j++)
+ planets[i].moons[j] = rnd_int(15, 0);
+ }
+}
+
+uint32_t lehmer()
+{
+ seed += 0xe120fc15;
+ uint64_t tmp;
+ tmp = (uint64_t)seed * 0x4a39b70d;
+ uint32_t m1 = (tmp >> 32) ^ tmp;
+ tmp = (uint64_t)m1 * 0x12fad5c9;
+ uint32_t m2 = (tmp >> 32) ^ tmp;
+ return m2;
+}
+
+int rnd_int(int max, int min)
+{
+ return (lehmer() % (max - min)) + min;
+}
diff --git a/src/shell.html b/src/shell.html
new file mode 100644
index 0000000..2188465
--- /dev/null
+++ b/src/shell.html
@@ -0,0 +1,82 @@
+<!DOCTYPE html>
+<html lang="en-us">
+ <head>
+ <meta charset="utf-8">
+ <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+ <title>Pendulum</title>
+ <style>
+ .el { margin: 5px; }
+ div.el { float: left; }
+ textarea.el { font-family: monospace; width: 100%; }
+ canvas.el { border: 0px none; background-color: black; }
+ </style>
+ </head>
+ <body>
+ <div class="el" id="status">Downloading...</div>
+
+ <div class="el">
+ <canvas id="canvas" oncontextmenu="event.preventDefault()" tabindex=-1></canvas>
+ </div>
+
+ <textarea class="el" id="output" rows="12"></textarea>
+
+ <script type='text/javascript'>
+ var statusElement = document.getElementById('status');
+
+ var Module = {
+ attachGLFWEventsToCanvas: true,
+ preRun: [],
+ postRun: [],
+ arguments: [],
+ print: (function() {
+ var element = document.getElementById('output');
+ if (element) element.value = ''; // clear browser cache
+ return function(text) {
+ if (arguments.length > 1) text = Array.prototype.slice.call(arguments).join(' ');
+ // These replacements are necessary if you render to raw HTML
+ //text = text.replace(/&/g, "&amp;");
+ //text = text.replace(/</g, "&lt;");
+ //text = text.replace(/>/g, "&gt;");
+ //text = text.replace('\n', '<br>', 'g');
+ console.log(text);
+ if (element) {
+ element.value += text + "\n";
+ element.scrollTop = element.scrollHeight; // focus on bottom
+ }
+ };
+ })(),
+ canvas: (function() {
+ var canvas = document.getElementById('canvas');
+
+ // As a default initial behavior, pop up an alert when webgl context is lost. To make your
+ // application robust, you may want to override this behavior before shipping!
+ // See http://www.khronos.org/registry/webgl/specs/latest/1.0/#5.15.2
+ canvas.addEventListener("webglcontextlost", function(e) { alert('WebGL context lost. You will need to reload the page.'); e.preventDefault(); }, false);
+
+ return canvas;
+ })(),
+ setStatus: function(text) {
+ if (!Module.setStatus.last) Module.setStatus.last = { time: Date.now(), text: '' };
+ if (text === Module.setStatus.last.text) return;
+ var now = Date.now();
+ Module.setStatus.last.time = now;
+ Module.setStatus.last.text = text;
+ statusElement.innerHTML = text;
+ },
+ totalDependencies: 0,
+ monitorRunDependencies: function(left) {
+ this.totalDependencies = Math.max(this.totalDependencies, left);
+ Module.setStatus(left ? 'Preparing... (' + (this.totalDependencies-left) + '/' + this.totalDependencies + ')' : 'All downloads complete.');
+ }
+ };
+ Module.setStatus('Downloading...');
+ window.onerror = function() {
+ Module.setStatus('Exception thrown, see JavaScript console');
+ Module.setStatus = function(text) {
+ if (text) console.error('[post-exception status] ' + text);
+ };
+ };
+ </script>
+ {{{ SCRIPT }}}
+ </body>
+</html>
generated by cgit v1.2.3 (git 2.25.1) at 2025-01-22 23:17:07 +0000