From 2629d485bfbb2b9e98737fdf4ac789fa943ebaf4 Mon Sep 17 00:00:00 2001
From: LJ5O <75009579+LJ5O@users.noreply.github.com>
Date: Tue, 18 Mar 2025 17:17:11 +0100
Subject: [PATCH] Added game of life background

---
 src/assets/base.css              |   4 +-
 src/components/GOLbackground.vue | 117 +++++++++++++++++++++++++++++++
 src/views/HomeView.vue           |   3 +
 3 files changed, 123 insertions(+), 1 deletion(-)
 create mode 100644 src/components/GOLbackground.vue

diff --git a/src/assets/base.css b/src/assets/base.css
index c9efb38..b24a4e1 100644
--- a/src/assets/base.css
+++ b/src/assets/base.css
@@ -2,8 +2,10 @@
   overflow-y: hidden;
   overflow-x: hidden;
 }
-html, body{
+html{
   background-color: #1E1E1E;
+}
+html, body{
   margin: 0;
   overflow-x: hidden;
   overflow-y: scroll !important;
diff --git a/src/components/GOLbackground.vue b/src/components/GOLbackground.vue
new file mode 100644
index 0000000..65077e6
--- /dev/null
+++ b/src/components/GOLbackground.vue
@@ -0,0 +1,117 @@
+<template>
+  <canvas id="gameOfLife"></canvas>
+</template>
+
+<script setup>
+        import {ref, onMounted, onBeforeMount, onUnmounted} from 'vue';
+        const running = ref(true);
+
+        onMounted(()=>{
+            const canvas = document.getElementById("gameOfLife");
+            const ctx = canvas.getContext("2d");
+            canvas.width = window.innerWidth;
+            canvas.height = window.innerHeight;
+            
+            // We find here the size of the grid to cover the whole screen
+            const cellSize = 20;
+            let rows = Math.floor(window.innerHeight/cellSize)+1;
+            let cols = Math.floor(window.innerWidth/cellSize)+1;
+
+            let grid;
+            let fadeEffectGrid;
+
+            function resizeCanvas() {
+                canvas.width = window.innerWidth;
+                canvas.height = window.innerHeight;
+                rows = Math.floor(window.innerHeight/cellSize)+1;
+                cols = Math.floor(window.innerWidth/cellSize)+1;
+                
+                grid = []
+                for(let i=0; i<rows; i++){
+                    let list = [];
+                    for(let j=0; j<cols; j++) list.push(Math.random() > 0.85 ? 1 : 0);
+                    grid.push(list);
+                }
+                fadeEffectGrid = grid.map(arr => [...arr]); // Full duplication
+            }
+            window.addEventListener("resize", resizeCanvas);
+            resizeCanvas(); // Generate for the first time the full 2d array
+
+            function nextGeneration() {
+                let newGrid = grid.map(arr => [...arr]); // Full duplication
+                for (let y = 0; y < rows; y++) { // For each row
+                    for (let x = 0; x < cols; x++) { // For each col
+                        let neighbors = 0; // We will count the number of living cells nearby
+                        for (let dy = -1; dy <= 1; dy++) { // We loop through the grid, starting by the cell at the upper left corner of the one we are working on
+                            for (let dx = -1; dx <= 1; dx++) { // And stopping at the lower right corner
+                                if (dx == 0 && dy == 0) continue; //We don't count the considered cell 
+                                let ny = (y + dy + rows)%rows; // We find here the real coords in the grid
+                                let nx = (x + dx + cols)%cols;
+                                neighbors += grid[ny][nx]; // We count the adjacent cell. We are in a tore, so other side is checked as well
+                            }
+                        }
+                        if (grid[y][x] == 1) { // Our cell is alive
+                            if (neighbors < 2 || neighbors > 3 || Math.random() > 0.999) newGrid[y][x] = 0; // Dies, and a small chance to die in any case
+                        } else { // Our cell is dead
+                            if (neighbors == 3) newGrid[y][x] = 1; // Alive
+                            if (Math.random() > 0.999){
+                                // Very small chance for a new group to spawn
+
+                                for (let dy = -2; dy <= 2; dy++) {
+                                    for (let dx = -2; dx <= 2; dx++) {
+                                        let ny = (y + dy + rows)%rows; // We find here the real coords in the grid
+                                        let nx = (x + dx + cols)%cols;
+                                        if(Math.random()<0.7) grid[ny][nx] = 1; // 70% of chance to be alive
+                                    }
+                                }
+
+                            } // End of chance based respawn
+                        }
+                    }
+                }
+                grid = newGrid;
+            }
+
+            function drawGrid() {
+                ctx.clearRect(0, 0, canvas.width, canvas.height);
+                for (let y = 0; y < rows; y++) {
+                    for (let x = 0; x < cols; x++) {
+                        if (grid[y][x]) {
+                            fadeEffectGrid[y][x] = 1; // This cell is alive, opacity is full
+                        } else {
+                            fadeEffectGrid[y][x] = Math.max(0, fadeEffectGrid[y][x] - 0.4); // Cell died, it will fade out
+                        }
+
+                        if (fadeEffectGrid[y][x] > 0) {
+                            ctx.fillStyle = `rgba(34, 35, 35, ${fadeEffectGrid[y][x]})`;
+                            ctx.fillRect(x * cellSize, y * cellSize, cellSize, cellSize);
+                        }
+                    }
+                }
+            }
+
+            function update() {
+                nextGeneration();
+                drawGrid();
+                if(running.value) setTimeout(update, 200); // We don't want it to be too quick
+            }
+            update();
+        });
+
+        onUnmounted(()=>{
+            window.removeEventListener("resize", resizeCanvas);
+            running.value = false;
+        })
+</script>
+
+<style scoped>
+    canvas{
+        position: fixed;
+        top: 0;
+        left: 0;
+        width: 100vw;
+        height: 100vh;
+        z-index: -1; /* Derrière le contenu */
+        border: 2px red;
+    }
+</style>
\ No newline at end of file
diff --git a/src/views/HomeView.vue b/src/views/HomeView.vue
index 0df9c8f..34fbd9f 100644
--- a/src/views/HomeView.vue
+++ b/src/views/HomeView.vue
@@ -1,4 +1,5 @@
 <script setup>
+  import GOLbackground from '@/components/GOLbackground.vue';
   import welcome from '@/components/home/welcome.vue';
   import intersection from '@/components/home/intersection.vue';
   import presentation from '@/components/home/presentation.vue';
@@ -42,6 +43,8 @@
 
 <template>
 
+    <GOLbackground />
+
     <welcome/>
 
     <intersection text="Lorem ipsum dolor sit amet" button-text="En savoir plus" button-link="#"/>