From e24233c1c7811e4aba2a07bac81a7464d4e1d190 Mon Sep 17 00:00:00 2001
From: syuilo <4439005+syuilo@users.noreply.github.com>
Date: Sat, 27 Sep 2025 20:53:21 +0900
Subject: [PATCH] add ideas

---
 idea/MkAnimatedBg.dotted-ripples.vue | 232 +++++++++++++++++++++++++++
 idea/MkAnimatedBg.dotted.vue         | 190 ++++++++++++++++++++++
 2 files changed, 422 insertions(+)
 create mode 100644 idea/MkAnimatedBg.dotted-ripples.vue
 create mode 100644 idea/MkAnimatedBg.dotted.vue

diff --git a/idea/MkAnimatedBg.dotted-ripples.vue b/idea/MkAnimatedBg.dotted-ripples.vue
new file mode 100644
index 0000000000..f8f809c8ce
--- /dev/null
+++ b/idea/MkAnimatedBg.dotted-ripples.vue
@@ -0,0 +1,232 @@
+<!--
+SPDX-FileCopyrightText: syuilo and misskey-project
+SPDX-License-Identifier: AGPL-3.0-only
+-->
+
+<template>
+<canvas ref="canvasEl" style="display: block; width: 100%; height: 100%; pointer-events: none;"></canvas>
+</template>
+
+<script lang="ts" setup>
+import { onMounted, onUnmounted, useTemplateRef } from 'vue';
+import isChromatic from 'chromatic/isChromatic';
+import { initShaderProgram } from '@/utility/webgl.js';
+
+const VERTEX_SHADER = `#version 300 es
+in vec2 position;
+out vec2 in_uv;
+
+void main() {
+	in_uv = (position + 1.0) / 2.0;
+	gl_Position = vec4(position, 0.0, 1.0);
+}
+`;
+
+const FRAGMENT_SHADER = `#version 300 es
+precision mediump float;
+
+const float PI = 3.141592653589793;
+const float TWO_PI = 6.283185307179586;
+const float HALF_PI = 1.5707963267948966;
+
+in vec2 in_uv;
+uniform vec2 in_resolution;
+uniform float u_scale;
+uniform float u_time;
+uniform float u_seed;
+uniform float u_angle;
+uniform float u_radius;
+uniform vec3 u_color;
+uniform vec2 u_ripplePositions[16];
+uniform float u_rippleRadiuses[16];
+out vec4 out_color;
+
+float getRipple(vec2 uv) {
+	float strength = 0.0;
+	float thickness = 0.05;
+	for (int i = 0; i < 16; i++) {
+		if (u_rippleRadiuses[i] <= 0.0) continue;
+
+		float d = distance(uv, u_ripplePositions[i]);
+
+		// フチ
+		if (d < u_rippleRadiuses[i] + thickness && d > u_rippleRadiuses[i] - thickness) {
+			float gradate =  abs(d - u_rippleRadiuses[i] + thickness) / thickness;
+			strength += (1.0 - u_rippleRadiuses[i]) * gradate;
+		}
+
+		// 内側
+		if (d < u_rippleRadiuses[i] + thickness) {
+			strength += 0.25 * (1.0 - u_rippleRadiuses[i]);
+		}
+	}
+	return strength;
+}
+
+void main() {
+	float x_ratio = min(in_resolution.x / in_resolution.y, 1.0);
+	float y_ratio = min(in_resolution.y / in_resolution.x, 1.0);
+
+	float angle = -(u_angle * PI);
+	vec2 centeredUv = (in_uv - vec2(0.5, 0.5)) * vec2(x_ratio, y_ratio);
+	vec2 rotatedUV = vec2(
+		centeredUv.x * cos(angle) - centeredUv.y * sin(angle),
+		centeredUv.x * sin(angle) + centeredUv.y * cos(angle)
+	);
+	vec2 uv = rotatedUV;
+
+	float time = u_time * 0.00025;
+
+	float size = 1.0 / u_scale;
+	float size_half = size / 2.0;
+	float modX = mod(uv.x, size);
+	float modY = mod(uv.y, size);
+
+	vec2 pixelated_uv = vec2(
+		(size * (floor((uv.x - 0.5 - size) / size) + 0.5)),
+		(size * (floor((uv.y - 0.5 - size) / size) + 0.5))
+	) + vec2(0.5 + size, 0.5 + size);
+
+	float strength = getRipple(pixelated_uv);
+
+	float opacity = min(max(strength, 0.0), 1.0);
+
+	float threshold = ((u_radius / 2.0) / u_scale);
+	if (length(vec2(modX - size_half, modY - size_half)) < threshold) {
+		out_color = vec4(u_color.r, u_color.g, u_color.b, opacity);
+		//out_color = vec4(1.0);
+		return;
+	}
+
+	// debug
+	//float a = min(max(getRipple(uv), 0.0), 1.0);
+	//out_color = vec4(u_color.r, u_color.g, u_color.b, (opacity + a) / 2.0);
+
+	out_color = vec4(0.0, 0.0, 0.0, 0.0);
+}
+`;
+
+const canvasEl = useTemplateRef('canvasEl');
+
+const props = withDefaults(defineProps<{
+	scale?: number;
+}>(), {
+	scale: 48,
+});
+
+let handle: ReturnType<typeof window['requestAnimationFrame']> | null = null;
+
+onMounted(() => {
+	const canvas = canvasEl.value!;
+	let width = canvas.offsetWidth;
+	let height = canvas.offsetHeight;
+	canvas.width = width;
+	canvas.height = height;
+
+	const maybeGl = canvas.getContext('webgl2', { preserveDrawingBuffer: false, alpha: true, premultipliedAlpha: false, antialias: true });
+	if (maybeGl == null) return;
+
+	const gl = maybeGl;
+
+	const VERTICES = new Float32Array([-1, -1, -1, 1, 1, 1, -1, -1, 1, 1, 1, -1]);
+	const vertexBuffer = gl.createBuffer();
+	gl.bindBuffer(gl.ARRAY_BUFFER, vertexBuffer);
+	gl.bufferData(gl.ARRAY_BUFFER, VERTICES, gl.STATIC_DRAW);
+
+	//gl.clearColor(0.0, 0.0, 0.0, 0.0);
+	//gl.clear(gl.COLOR_BUFFER_BIT);
+
+	const shaderProgram = initShaderProgram(gl, VERTEX_SHADER, FRAGMENT_SHADER);
+
+	gl.useProgram(shaderProgram);
+
+	const positionLocation = gl.getAttribLocation(shaderProgram, 'position');
+	gl.vertexAttribPointer(positionLocation, 2, gl.FLOAT, false, 0, 0);
+	gl.enableVertexAttribArray(positionLocation);
+
+	const in_resolution = gl.getUniformLocation(shaderProgram, 'in_resolution');
+	gl.uniform2fv(in_resolution, [canvas.width, canvas.height]);
+
+	const u_time = gl.getUniformLocation(shaderProgram, 'u_time');
+	const u_seed = gl.getUniformLocation(shaderProgram, 'u_seed');
+	const u_scale = gl.getUniformLocation(shaderProgram, 'u_scale');
+	const u_angle = gl.getUniformLocation(shaderProgram, 'u_angle');
+	const u_radius = gl.getUniformLocation(shaderProgram, 'u_radius');
+	const u_color = gl.getUniformLocation(shaderProgram, 'u_color');
+	gl.uniform1f(u_seed, Math.random() * 1000);
+	gl.uniform1f(u_scale, props.scale);
+	gl.uniform1f(u_angle, 0.0);
+	gl.uniform1f(u_radius, 0.15);
+	gl.uniform3fv(u_color, [0.5, 1.0, 0]);
+
+	if (isChromatic()) {
+		gl.uniform1f(u_time, 0);
+		gl.drawArrays(gl.TRIANGLES, 0, 6);
+	} else {
+		let ripples = [] as { position: [number, number]; startTime: number; }[];
+		const LIFE_TIME = 1000 * 4;
+
+		function render(timeStamp: number) {
+			let sizeChanged = false;
+			if (Math.abs(height - canvas.offsetHeight) > 2) {
+				height = canvas.offsetHeight;
+				canvas.height = height;
+				sizeChanged = true;
+			}
+			if (Math.abs(width - canvas.offsetWidth) > 2) {
+				width = canvas.offsetWidth;
+				canvas.width = width;
+				sizeChanged = true;
+			}
+			if (sizeChanged && gl) {
+				gl.uniform2fv(in_resolution, [width, height]);
+				gl.viewport(0, 0, width, height);
+			}
+
+			gl.uniform1f(u_time, timeStamp);
+
+			if (Math.random() < 0.01 && ripples.length < 16) {
+				ripples.push({ position: [(Math.random() * 2) - 1, (Math.random() * 2) - 1], startTime: timeStamp });
+			}
+
+			for (let i = 0; i < 16; i++) {
+				const o = gl.getUniformLocation(shaderProgram, `u_ripplePositions[${i.toString()}]`);
+				const r = gl.getUniformLocation(shaderProgram, `u_rippleRadiuses[${i.toString()}]`);
+				const ripple = ripples[i];
+				if (ripple == null) {
+					gl.uniform2f(o, 0, 0);
+					gl.uniform1f(r, 0.0);
+					continue;
+				}
+
+				const delta = timeStamp - ripple.startTime;
+
+				gl.uniform2f(o, ripple.position[0], ripple.position[1]);
+				gl.uniform1f(r, delta / LIFE_TIME);
+			}
+
+			ripples = ripples.filter(r => (timeStamp - r.startTime) < LIFE_TIME);
+			if (ripples.length === 0) {
+				ripples.push({ position: [(Math.random() * 2) - 1, (Math.random() * 2) - 1], startTime: timeStamp });
+			}
+
+			gl.drawArrays(gl.TRIANGLES, 0, 6);
+
+			handle = window.requestAnimationFrame(render);
+		}
+
+		handle = window.requestAnimationFrame(render);
+	}
+});
+
+onUnmounted(() => {
+	if (handle) {
+		window.cancelAnimationFrame(handle);
+	}
+
+	// TODO: WebGLリソースの解放
+});
+</script>
+
+<style lang="scss" module>
+</style>
diff --git a/idea/MkAnimatedBg.dotted.vue b/idea/MkAnimatedBg.dotted.vue
new file mode 100644
index 0000000000..7f68b8972a
--- /dev/null
+++ b/idea/MkAnimatedBg.dotted.vue
@@ -0,0 +1,190 @@
+<!--
+SPDX-FileCopyrightText: syuilo and misskey-project
+SPDX-License-Identifier: AGPL-3.0-only
+-->
+
+<template>
+<canvas ref="canvasEl" style="display: block; width: 100%; height: 100%; pointer-events: none;"></canvas>
+</template>
+
+<script lang="ts" setup>
+import { onMounted, onUnmounted, useTemplateRef } from 'vue';
+import isChromatic from 'chromatic/isChromatic';
+import { GLSL_LIB_SNOISE, initShaderProgram } from '@/utility/webgl.js';
+
+const VERTEX_SHADER = `#version 300 es
+in vec2 position;
+out vec2 in_uv;
+
+void main() {
+	in_uv = (position + 1.0) / 2.0;
+	gl_Position = vec4(position, 0.0, 1.0);
+}
+`;
+
+const FRAGMENT_SHADER = `#version 300 es
+precision mediump float;
+
+const float PI = 3.141592653589793;
+const float TWO_PI = 6.283185307179586;
+const float HALF_PI = 1.5707963267948966;
+
+${GLSL_LIB_SNOISE}
+
+in vec2 in_uv;
+uniform vec2 in_resolution;
+uniform float u_scale;
+uniform float u_time;
+uniform float u_seed;
+uniform float u_angle;
+uniform float u_radius;
+uniform vec3 u_color;
+out vec4 out_color;
+
+void main() {
+	float x_ratio = min(in_resolution.x / in_resolution.y, 1.0);
+	float y_ratio = min(in_resolution.y / in_resolution.x, 1.0);
+
+	float size = 1.0 / u_scale;
+	float size_half = size / 2.0;
+
+	float angle = -(u_angle * PI);
+	vec2 centeredUv = (in_uv - vec2(0.5, 0.5)) * vec2(x_ratio, y_ratio);
+	vec2 rotatedUV = vec2(
+		centeredUv.x * cos(angle) - centeredUv.y * sin(angle),
+		centeredUv.x * sin(angle) + centeredUv.y * cos(angle)
+	);
+	vec2 uv = rotatedUV;
+
+	float modX = mod(uv.x, size);
+	float modY = mod(uv.y, size);
+
+	vec2 pixelated_uv = vec2(
+		(size * (floor((uv.x - 0.5 - size) / size) + 0.5)),
+		(size * (floor((uv.y - 0.5 - size) / size) + 0.5))
+	) + vec2(0.5 + size, 0.5 + size);
+
+	float time = u_time * 0.00025;
+
+	float noiseAScale = 1.0;
+	float noiseAX = (pixelated_uv.x + u_seed) * (u_scale / noiseAScale);
+	float noiseAY = (pixelated_uv.y + u_seed) * (u_scale / noiseAScale);
+  float noiseA = snoise(vec3(noiseAX, noiseAY, time * 2.0));
+
+	float noiseBScale = 32.0;
+	float noiseBX = (pixelated_uv.x + u_seed) * (u_scale / noiseBScale);
+	float noiseBY = (pixelated_uv.y + u_seed) * (u_scale / noiseBScale);
+  float noiseB = snoise(vec3(noiseBX, noiseBY, time));
+
+	float strength = 0.0;
+	strength += noiseA * 0.2;
+	strength += noiseB * 0.8;
+
+	float opacity = min(max(strength, 0.0), 1.0);
+
+	float threshold = ((u_radius / 2.0) / u_scale);
+	if (length(vec2(modX - size_half, modY - size_half)) < threshold) {
+		out_color = vec4(u_color.r, u_color.g, u_color.b, opacity);
+		return;
+	}
+
+	out_color = vec4(0.0, 0.0, 0.0, 0.0);
+}
+`;
+
+const canvasEl = useTemplateRef('canvasEl');
+
+const props = withDefaults(defineProps<{
+	scale?: number;
+}>(), {
+	scale: 48,
+});
+
+let handle: ReturnType<typeof window['requestAnimationFrame']> | null = null;
+
+onMounted(() => {
+	const canvas = canvasEl.value!;
+	let width = canvas.offsetWidth;
+	let height = canvas.offsetHeight;
+	canvas.width = width;
+	canvas.height = height;
+
+	const maybeGl = canvas.getContext('webgl2', { preserveDrawingBuffer: false, alpha: true, premultipliedAlpha: false, antialias: true });
+	if (maybeGl == null) return;
+
+	const gl = maybeGl;
+
+	const VERTICES = new Float32Array([-1, -1, -1, 1, 1, 1, -1, -1, 1, 1, 1, -1]);
+	const vertexBuffer = gl.createBuffer();
+	gl.bindBuffer(gl.ARRAY_BUFFER, vertexBuffer);
+	gl.bufferData(gl.ARRAY_BUFFER, VERTICES, gl.STATIC_DRAW);
+
+	//gl.clearColor(0.0, 0.0, 0.0, 0.0);
+	//gl.clear(gl.COLOR_BUFFER_BIT);
+
+	const shaderProgram = initShaderProgram(gl, VERTEX_SHADER, FRAGMENT_SHADER);
+
+	gl.useProgram(shaderProgram);
+
+	const positionLocation = gl.getAttribLocation(shaderProgram, 'position');
+	gl.vertexAttribPointer(positionLocation, 2, gl.FLOAT, false, 0, 0);
+	gl.enableVertexAttribArray(positionLocation);
+
+	const in_resolution = gl.getUniformLocation(shaderProgram, 'in_resolution');
+	gl.uniform2fv(in_resolution, [canvas.width, canvas.height]);
+
+	const u_time = gl.getUniformLocation(shaderProgram, 'u_time');
+	const u_seed = gl.getUniformLocation(shaderProgram, 'u_seed');
+	const u_scale = gl.getUniformLocation(shaderProgram, 'u_scale');
+	const u_angle = gl.getUniformLocation(shaderProgram, 'u_angle');
+	const u_radius = gl.getUniformLocation(shaderProgram, 'u_radius');
+	const u_color = gl.getUniformLocation(shaderProgram, 'u_color');
+	gl.uniform1f(u_seed, Math.random() * 1000);
+	gl.uniform1f(u_scale, props.scale);
+	gl.uniform1f(u_angle, 0.0);
+	gl.uniform1f(u_radius, 0.15);
+	gl.uniform3fv(u_color, [0.5, 1.0, 0]);
+
+	if (isChromatic()) {
+		gl.uniform1f(u_time, 0);
+		gl.drawArrays(gl.TRIANGLES, 0, 6);
+	} else {
+		function render(timeStamp: number) {
+			let sizeChanged = false;
+			if (Math.abs(height - canvas.offsetHeight) > 2) {
+				height = canvas.offsetHeight;
+				canvas.height = height;
+				sizeChanged = true;
+			}
+			if (Math.abs(width - canvas.offsetWidth) > 2) {
+				width = canvas.offsetWidth;
+				canvas.width = width;
+				sizeChanged = true;
+			}
+			if (sizeChanged && gl) {
+				gl.uniform2fv(in_resolution, [width, height]);
+				gl.viewport(0, 0, width, height);
+			}
+
+			gl.uniform1f(u_time, timeStamp);
+
+			gl.drawArrays(gl.TRIANGLES, 0, 6);
+
+			handle = window.requestAnimationFrame(render);
+		}
+
+		handle = window.requestAnimationFrame(render);
+	}
+});
+
+onUnmounted(() => {
+	if (handle) {
+		window.cancelAnimationFrame(handle);
+	}
+
+	// TODO: WebGLリソースの解放
+});
+</script>
+
+<style lang="scss" module>
+</style>