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// WebGL background effect for Nixtaml website
// Particle system with subtle animations fitting "crash-over-burn" theme
(function() {
// Check for reduced motion preference
const prefersReducedMotion = window.matchMedia('(prefers-reduced-motion: reduce)').matches;
// Check if mobile (simplify or disable for performance)
const isMobile = window.innerWidth < 768;
// If reduced motion or mobile, skip WebGL
if (prefersReducedMotion || isMobile) {
console.log('WebGL background disabled: reduced motion or mobile');
return;
}
// Check WebGL support
const canvas = document.createElement('canvas');
const gl = canvas.getContext('webgl2') || canvas.getContext('webgl');
if (!gl) {
console.log('WebGL not supported, using fallback');
return;
}
// Append canvas to body
canvas.id = 'webgl-bg';
document.body.insertBefore(canvas, document.body.firstChild);
// Set canvas size
function resizeCanvas() {
canvas.width = window.innerWidth;
canvas.height = window.innerHeight;
gl.viewport(0, 0, canvas.width, canvas.height);
}
resizeCanvas();
window.addEventListener('resize', resizeCanvas);
// Load shader
function loadShader(gl, type, source) {
const shader = gl.createShader(type);
gl.shaderSource(shader, source);
gl.compileShader(shader);
if (!gl.getShaderParameter(shader, gl.COMPILE_STATUS)) {
console.error('Shader compile error:', gl.getShaderInfoLog(shader));
gl.deleteShader(shader);
return null;
}
return shader;
}
// Create program
const vertexShaderSource = `
attribute vec2 a_position;
attribute float a_size;
attribute vec3 a_color;
uniform mat4 u_matrix;
uniform float u_time;
varying vec3 v_color;
void main() {
vec4 position = vec4(a_position, 0.0, 1.0);
position.x += sin(u_time * 0.001 + a_position.y * 0.01) * 0.05;
position.y += cos(u_time * 0.0005 + a_position.x * 0.01) * 0.02;
gl_Position = u_matrix * position;
gl_PointSize = a_size;
v_color = a_color;
}
`;
const fragmentShaderSource = `
precision mediump float;
varying vec3 v_color;
void main() {
vec2 center = gl_PointCoord - vec2(0.5);
float dist = length(center);
if (dist > 0.5) {
discard;
}
float alpha = 1.0 - smoothstep(0.0, 0.5, dist);
gl_FragColor = vec4(v_color, alpha * 0.2);
}
`;
const vertexShader = loadShader(gl, gl.VERTEX_SHADER, vertexShaderSource);
const fragmentShader = loadShader(gl, gl.FRAGMENT_SHADER, fragmentShaderSource);
const program = gl.createProgram();
gl.attachShader(program, vertexShader);
gl.attachShader(program, fragmentShader);
gl.linkProgram(program);
if (!gl.getProgramParameter(program, gl.LINK_STATUS)) {
console.error('Program link error:', gl.getProgramInfoLog(program));
return;
}
gl.useProgram(program);
// Get attribute locations
const positionLocation = gl.getAttribLocation(program, 'a_position');
const sizeLocation = gl.getAttribLocation(program, 'a_size');
const colorLocation = gl.getAttribLocation(program, 'a_color');
// Get uniform locations
const matrixLocation = gl.getUniformLocation(program, 'u_matrix');
const timeLocation = gl.getUniformLocation(program, 'u_time');
// Create particles
const numParticles = 200;
const positions = new Float32Array(numParticles * 2);
const sizes = new Float32Array(numParticles);
const colors = new Float32Array(numParticles * 3);
for (let i = 0; i < numParticles; i++) {
positions[i * 2] = (Math.random() - 0.5) * 4; // Spread across screen
positions[i * 2 + 1] = (Math.random() - 0.5) * 4;
sizes[i] = Math.random() * 5 + 2; // Size 2-7
// Orange/red colors
colors[i * 3] = Math.random() * 0.5 + 0.5; // R
colors[i * 3 + 1] = Math.random() * 0.3 + 0.2; // G
colors[i * 3 + 2] = Math.random() * 0.1; // B
}
// Create buffers
const positionBuffer = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, positionBuffer);
gl.bufferData(gl.ARRAY_BUFFER, positions, gl.STATIC_DRAW);
const sizeBuffer = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, sizeBuffer);
gl.bufferData(gl.ARRAY_BUFFER, sizes, gl.STATIC_DRAW);
const colorBuffer = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, colorBuffer);
gl.bufferData(gl.ARRAY_BUFFER, colors, gl.STATIC_DRAW);
// Enable blending
gl.enable(gl.BLEND);
gl.blendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA);
// Render loop
let startTime = Date.now();
function render() {
const time = Date.now() - startTime;
// Clear
gl.clearColor(0, 0, 0, 0);
gl.clear(gl.COLOR_BUFFER_BIT);
// Set uniforms
const matrix = new Float32Array([
1, 0, 0, 0,
0, 1, 0, 0,
0, 0, 1, 0,
0, 0, 0, 1
]);
gl.uniformMatrix4fv(matrixLocation, false, matrix);
gl.uniform1f(timeLocation, time);
// Bind position buffer
gl.bindBuffer(gl.ARRAY_BUFFER, positionBuffer);
gl.enableVertexAttribArray(positionLocation);
gl.vertexAttribPointer(positionLocation, 2, gl.FLOAT, false, 0, 0);
// Bind size buffer
gl.bindBuffer(gl.ARRAY_BUFFER, sizeBuffer);
gl.enableVertexAttribArray(sizeLocation);
gl.vertexAttribPointer(sizeLocation, 1, gl.FLOAT, false, 0, 0);
// Bind color buffer
gl.bindBuffer(gl.ARRAY_BUFFER, colorBuffer);
gl.enableVertexAttribArray(colorLocation);
gl.vertexAttribPointer(colorLocation, 3, gl.FLOAT, false, 0, 0);
// Draw
gl.drawArrays(gl.POINTS, 0, numParticles);
requestAnimationFrame(render);
}
render();
})();
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