Implement generator classes and perlin noise with colors

src/MapGenerator.php

@@ -0,0 +1,37 @@
+<?php
+
+namespace Ardent\Game;
+
+use Ardent\Game\dto\Color;
+
+class MapGenerator
+{
+    private readonly Noise $noise;
+
+    public function __construct(
+        private readonly Renderer $renderer,
+    )
+    {
+        $this->noise = new Noise();
+    }
+
+    public function getMap(): array
+    {
+        $pixels = [];
+        for ($x = 0; $x < 280; $x++) {
+            for ($y = 0; $y < 140; $y++) {
+                $pixels[] = $this->drawPixel($x, $y, $this->noise->generate($x, $y));
+            }
+        }
+        return $pixels;
+    }
+
+    private function drawPixel(int $x, int $y, Color $color): string
+    {
+        return $this->renderer->render('pixel.html.twig', [
+            'x' => $x,
+            'y' => $y,
+            'color' => $color,
+        ]);
+    }
+}

src/Noise.php

@@ -0,0 +1,46 @@
+<?php
+
+namespace Ardent\Game;
+
+use Ardent\Game\dto\Color;
+
+class Noise
+{
+    private readonly PerlinNoise $noise;
+
+    public function __construct(
+        float $seed = 0.0,
+    )
+    {
+        $this->noise = new PerlinNoise(4564561234);
+    }
+
+    public function generate(int $x, int $y): Color
+    {
+        $water = new Color(0, 156, 244);
+        $sand = new Color(238, 226, 104);
+        $grass = new Color(25, 171, 64);
+//        $mountain = new Color(169, 94, 64);
+        $mountain = new Color(96, 93, 100);
+        $snow = new Color(255, 255, 255);
+
+        $rand = $this->noise->random2D($x, $y, 150);
+//        $rand = $this->sigmoid($rand);
+
+        if ($rand < 0.0) {
+            return $water->lerp($sand, $rand + 1.0);
+        } elseif ($rand <= 0.5) {
+            return $sand->lerp($grass, $rand * (1.0 / 0.5));
+        } elseif ($rand <= 0.99) {
+            return $grass->lerp($mountain, ($rand - 0.5) * (1.0 / 0.49));
+        } else {
+            return $mountain->lerp($snow, ($rand - 0.99) * (1.0 / 0.01));
+        }
+
+//        return new Color(
+//            red: $rand * 255,
+//            green: $rand * 255,
+//            blue: $rand * 255,
+//        );
+    }
+}

src/PerlinNoise.php

@@ -0,0 +1,177 @@
+<?php
+
+namespace Ardent\Game;
+
+class PerlinNoise
+{
+
+    private array $p;
+    private float $seed;
+    private int $_default_size = 64;
+
+    public function __construct(float $seed = null)
+    {
+        //Initialize the permutation array.
+        $this->p = [];
+        $permutation = [
+            151, 160, 137, 91, 90, 15,
+            131, 13, 201, 95, 96, 53, 194, 233, 7, 225, 140, 36, 103, 30, 69, 142, 8, 99, 37, 240, 21, 10, 23,
+            190, 6, 148, 247, 120, 234, 75, 0, 26, 197, 62, 94, 252, 219, 203, 117, 35, 11, 32, 57, 177, 33,
+            88, 237, 149, 56, 87, 174, 20, 125, 136, 171, 168, 68, 175, 74, 165, 71, 134, 139, 48, 27, 166,
+            77, 146, 158, 231, 83, 111, 229, 122, 60, 211, 133, 230, 220, 105, 92, 41, 55, 46, 245, 40, 244,
+            102, 143, 54, 65, 25, 63, 161, 1, 216, 80, 73, 209, 76, 132, 187, 208, 89, 18, 169, 200, 196,
+            135, 130, 116, 188, 159, 86, 164, 100, 109, 198, 173, 186, 3, 64, 52, 217, 226, 250, 124, 123,
+            5, 202, 38, 147, 118, 126, 255, 82, 85, 212, 207, 206, 59, 227, 47, 16, 58, 17, 182, 189, 28, 42,
+            223, 183, 170, 213, 119, 248, 152, 2, 44, 154, 163, 70, 221, 153, 101, 155, 167, 43, 172, 9,
+            129, 22, 39, 253, 19, 98, 108, 110, 79, 113, 224, 232, 178, 185, 112, 104, 218, 246, 97, 228,
+            251, 34, 242, 193, 238, 210, 144, 12, 191, 179, 162, 241, 81, 51, 145, 235, 249, 14, 239, 107,
+            49, 192, 214, 31, 181, 199, 106, 157, 184, 84, 204, 176, 115, 121, 50, 45, 127, 4, 150, 254,
+            138, 236, 205, 93, 222, 114, 67, 29, 24, 72, 243, 141, 128, 195, 78, 66, 215, 61, 156, 180,
+        ];
+
+        //Populate it
+        for ($i = 0; $i < 256; $i++) {
+            $this->p[256 + $i] = $this->p[$i] = $permutation[$i];
+        }
+
+        //And set the seed
+        if ($seed === null) {
+            $this->seed = time();
+        } else {
+            $this->seed = $seed;
+        }
+    }
+
+    function noise($x, $y, $z, $size = NULL): float|int
+    {
+        if ($size == NULL) $size = $this->_default_size;
+
+        //Set the initial value and initial size
+        $value = 0.0;
+        $initialSize = $size;
+
+        //Add finer and finer hues of smoothed noise together
+        while ($size >= 1) {
+
+            $value += $this->smoothNoise($x / $size, $y / $size, $z / $size) * $size;
+            $size /= 2.0;
+
+        }
+
+        //Return the result over the initial size
+        return $value / $initialSize;
+
+    }
+
+    //This function determines what cube the point passed resides in
+    //and determines its value.
+    function smoothNoise(float $x, float $y, float $z): float
+    {
+        //Offset each coordinate by the seed value
+        $x += $this->seed;
+        $y += $this->seed;
+        $z += $this->seed;
+
+        $orig_x = $x;
+        $orig_y = $y;
+        $orig_z = $z;
+
+        $X1 = (int)floor($x) & 255;                  // FIND UNIT CUBE THAT
+        $Y1 = (int)floor($y) & 255;                  // CONTAINS POINT.
+        $Z1 = (int)floor($z) & 255;
+        $x -= floor($x);                                // FIND RELATIVE X,Y,Z
+        $y -= floor($y);                                // OF POINT IN CUBE.
+        $z -= floor($z);
+        $u = $this->fade($x);                                // COMPUTE FADE CURVES
+        $v = $this->fade($y);                                // FOR EACH OF X,Y,Z.
+        $w = $this->fade($z);
+
+        $A = $this->p[$X1] + $Y1;
+        $AA = $this->p[$A] + $Z1;
+        $AB = $this->p[$A + 1] + $Z1;      // HASH COORDINATES OF
+        $B = $this->p[$X1 + 1] + $Y1;
+        $BA = $this->p[$B] + $Z1;
+        $BB = $this->p[$B + 1] + $Z1;      // THE 8 CUBE CORNERS,
+
+        //Interpolate between the 8 points determined
+        return $this->lerp($w, $this->lerp($v, $this->lerp($u, $this->grad($this->p[$AA], $x, $y, $z),  // AND ADD
+            $this->grad($this->p[$BA], $x - 1, $y, $z)), // BLENDED
+            $this->lerp($u, $this->grad($this->p[$AB], $x, $y - 1, $z),  // RESULTS
+                $this->grad($this->p[$BB], $x - 1, $y - 1, $z))),// FROM  8
+            $this->lerp($v, $this->lerp($u, $this->grad($this->p[$AA + 1], $x, $y, $z - 1),  // CORNERS
+                $this->grad($this->p[$BA + 1], $x - 1, $y, $z - 1)), // OF CUBE
+                $this->lerp($u, $this->grad($this->p[$AB + 1], $x, $y - 1, $z - 1),
+                    $this->grad($this->p[$BB + 1], $x - 1, $y - 1, $z - 1))));
+    }
+
+    function fade(float $t): float
+    {
+        return $t * $t * $t * (($t * (($t * 6) - 15)) + 10);
+    }
+
+    function lerp(float $t, float $a, float $b): float
+    {
+        //Make a weighted interpolation between points
+        return $a + $t * ($b - $a);
+    }
+
+    function grad($hash, float $x, float $y, float $z): float
+    {
+        $h = $hash & 15;                      // CONVERT LO 4 BITS OF HASH CODE
+        $u = $h < 8 ? $x : $y;                 // INTO 12 GRADIENT DIRECTIONS.
+        $v = $h < 4 ? $y : ($h == 12 || $h == 14 ? $x : $z);
+
+        return (($h & 1) == 0 ? $u : -$u) + (($h & 2) == 0 ? $v : -$v);
+    }
+
+    //This function I've added. It creates one dimension of noise.
+    function random1D(float $x, ?int $size = null): float
+    {
+        if ($size === NULL) {
+            $size = $this->_default_size;
+        }
+
+        $x += $this->seed;
+
+        $value = 0.0;
+        $initialSize = $size;
+
+        while ($size >= 1) {
+            $value += $this->smoothNoise($x * 3 / $size, 100 / $size, 100 / $size);
+            $size--;
+        }
+
+        if ($value < -1) $value = -1;
+        if ($value > 1) $value = 1;
+
+        return $value;
+    }
+
+    //Same as random1D() only for 2 dimensions.
+    function random2D(float $x, float $y, ?int $size = NULL): float
+    {
+        if ($size === NULL) {
+            $size = $this->_default_size;
+        }
+
+        $x += $this->seed;
+        $y += $this->seed;
+
+        $value = 0.0;
+        $initialSize = $size;
+
+        while ($size >= 1) {
+            $value += $this->smoothNoise($x / $size, $y / $size, 100 / $size);
+            $size--;
+        }
+
+//        $value /= 2.0;
+
+        return $this->sigmoid($value);
+    }
+
+    private function sigmoid(float $t): float
+    {
+        return 2.0 / (1.0 + exp(-$t)) - 1.0;
+    }
+}

src/Renderer.php

@@ -5,7 +5,7 @@ namespace Ardent\Game;
 use Twig\Environment;
 use Twig\Loader\FilesystemLoader;
 
-class renderer
+class Renderer
 {
     private Environment $twig;
 

src/dto/Color.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace Ardent\Game\dto;
+
+class Color
+{
+
+    public function __construct(
+        public int $red,
+        public int $green,
+        public int $blue,
+        public int $alpha = 255
+    )
+    {
+    }
+
+    public function getCode(): string
+    {
+//        return "rgba({$this->red}, {$this->green}, {$this->blue}, {$this->alpha})";
+        return "rgb({$this->red}, {$this->green}, {$this->blue})";
+    }
+
+    public function lerp(Color $color, float $range): Color
+    {
+        return new Color(
+            red: $this->red + ($color->red - $this->red) * $range,
+            green: $this->green + ($color->green - $this->green) * $range,
+            blue: $this->blue + ($color->blue - $this->blue) * $range,
+            alpha: $this->alpha + ($color->alpha - $this->alpha) * $range,
+        );
+    }
+}

src/index.php

@@ -3,8 +3,12 @@
 namespace Ardent\Game;
 
 include '../vendor/autoload.php';
-include "renderer.php";
+include "Renderer.php";
+include "MapGenerator.php";
 
-$renderer = new renderer();
+$renderer = new Renderer();
+$map = new MapGenerator($renderer);
 
-echo $renderer->render('index.html.twig');
+echo $renderer->render('map.html.twig', [
+    'pixels' => $map->getMap(),
+]);

templates/map.html.twig

@@ -0,0 +1,27 @@
+<style>
+    :root {
+        --pixel-size: 9px;
+        --pixel-gap: 0px;
+        --pixel-color: #000;
+    }
+
+    .map {
+        display: grid;
+        grid-template-columns: repeat(279, var(--pixel-size));
+        grid-auto-rows: var(--pixel-size);
+        grid-gap: var(--pixel-gap);
+    }
+
+    .map > div {
+        width: var(--pixel-size);
+        height: 100%;
+        grid-area: var(--y) / var(--x) / var(--y) / var(--x);
+        background-color: var(--pixel-color);
+    }
+</style>
+
+<div class="map">
+    {% for pixel in pixels %}
+        {{ pixel|raw }}
+    {% endfor %}
+</div>

templates/pixel.html.twig

@@ -0,0 +1 @@
+<div style="--x: {{ x }}; --y: {{ y }}; background: {{ color.code }}"></div>