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1285 lines (1195 loc) · 57.9 KB
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width,initial-scale=1,maximum-scale=1,user-scalable=no">
<title>SkyRider</title>
<style>
* {
margin: 0;
padding: 0
}
body {
overflow: hidden;
background: #000;
touch-action: none;
-webkit-user-select: none;
user-select: none
}
canvas {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%
}
#h {
z-index: 1;
pointer-events: none
}
#m {
z-index: 2;
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
display: flex;
flex-direction: column;
align-items: center;
justify-content: center;
color: #fff;
font-family: sans-serif;
text-align: center;
background: rgba(0, 0, 0, .45)
}
#m h1 {
font-size: 2.8em;
margin-bottom: .1em;
text-shadow: 0 0 30px #f80, 0 0 60px #f40;
letter-spacing: 2px
}
#m p {
font-size: 1.15em;
opacity: .8
}
#m .s {
font-size: 2em;
color: #fd0;
margin: .2em 0
}
#m .sub {
font-size: .9em;
opacity: .4;
margin-top: 1.2em
}
</style>
</head>
<body>
<canvas id="g"></canvas>
<canvas id="h"></canvas>
<div id="m">
<h1>SKYRIDER</h1>
</div>
<script>
"use strict";
var G = document.getElementById('g'), H = document.getElementById('h'), M = document.getElementById('m');
var gl = G.getContext('webgl', { antialias: false, alpha: false });
var hc = H.getContext('2d');
var W, Ht;
function resize() {
W = innerWidth; Ht = innerHeight;
G.width = H.width = W; G.height = H.height = Ht;
gl.viewport(0, 0, W, Ht);
}
resize(); addEventListener('resize', resize);
// === TERRAIN SHADER ===
var VS = `
precision mediump float;
attribute vec3 aP;
attribute vec3 aC;
attribute vec3 aN;
uniform mat4 uVP;
uniform vec3 uCam;
uniform float uTime;
varying vec3 vC;
varying vec3 vN;
varying vec3 vPos;
varying float vF;
void main(){
vec3 pos=aP;
float isWater=step(0.5,aC.b)*step(aC.r,0.25);
pos.y+=isWater*(sin(pos.x*0.1+uTime*2.0)*0.8+cos(pos.z*0.13+uTime*1.5)*0.6);
gl_Position=uVP*vec4(pos,1.0);
float d=length(pos.xz-uCam.xz);
vF=clamp(d/500.0,0.0,1.0);
vC=aC;
vN=aN;
vPos=pos;
}`;
var FS = `
precision mediump float;
varying vec3 vC;
varying vec3 vN;
varying vec3 vPos;
varying float vF;
uniform vec3 uSky;
uniform vec3 uCam;
uniform float uTime;
float hn(vec2 p){p=fract(p*vec2(.1031,.103));p+=dot(p,p.yx+33.33);return fract((p.x+p.y)*p.x);}
void main(){
vec3 sunDir=normalize(vec3(0.4,0.6,0.3));
vec3 sunCol=vec3(1.0,0.92,0.75);
vec3 V=normalize(uCam-vPos);
vec3 hv=normalize(sunDir+V);
float NdL=max(dot(vN,sunDir),0.0);
vec3 ambUp=vec3(0.4,0.5,0.65);
vec3 ambDn=vec3(0.25,0.2,0.15);
vec3 amb=mix(ambDn,ambUp,dot(vN,vec3(0.0,1.0,0.0))*0.5+0.5);
float nv=hn(vPos.xz*0.5)*0.08-0.04;
vec3 bc=vC+vec3(nv);
vec3 col=bc*(amb+sunCol*0.7*NdL);
float ao=clamp(vPos.y/80.0+0.4,0.45,1.0);
col*=ao;
float slope=1.0-vN.y;
col*=1.0-slope*slope*0.25;
float cloud=sin(vPos.x*0.015+uTime*0.4)*sin(vPos.z*0.018-uTime*0.3);
col*=0.82+0.18*smoothstep(-0.2,0.3,cloud);
float isWater=step(0.5,vC.b)*step(vC.r,0.25);
float spec=pow(max(dot(vN,hv),0.0),64.0);
col+=sunCol*spec*1.0*isWater;
float caust=sin(vPos.x*0.8+uTime*1.5)*sin(vPos.z*0.7-uTime*1.2)*0.5+0.5;
col+=vec3(0.04,0.1,0.16)*caust*isWater;
float fres=pow(1.0-max(dot(V,vN),0.0),4.0);
col=mix(col,mix(col,uSky*1.2,fres*0.5),isWater);
float isSnow=step(0.85,vC.r)*step(0.85,vC.g);
float sspec=pow(max(dot(vN,hv),0.0),32.0);
col+=sunCol*sspec*0.5*isSnow;
float isGrass=step(0.15,vC.g)*step(vC.r,0.5)*(1.0-isWater)*(1.0-isSnow);
float sss=max(dot(-V,sunDir),0.0)*0.12;
col+=vec3(0.08,0.15,0.02)*sss*isGrass;
float ht=clamp(vPos.y*0.01,0.0,1.0);
vec3 fogNr=mix(vec3(0.88,0.78,0.58),uSky,ht);
vec3 fogFr=mix(vec3(0.9,0.8,0.6),vec3(0.7,0.8,0.92),ht);
vec3 fogCol=mix(fogNr,fogFr,vF);
float f=1.0-exp(-vF*vF*3.5);
col=mix(col,fogCol,f);
gl_FragColor=vec4(col,1.0);
}`;
// === SKY SHADER ===
var SKVS = `
precision mediump float;
attribute vec2 aPos;
varying vec2 vUV;
void main(){
gl_Position=vec4(aPos,0.999,1.0);
vUV=aPos*0.5+0.5;
}`;
var SKFS = `
precision mediump float;
varying vec2 vUV;
void main(){
vec3 top=vec3(0.22,0.42,0.82);
vec3 mid=vec3(0.45,0.65,0.92);
vec3 hor=vec3(0.92,0.78,0.55);
float t=vUV.y;
vec3 col=mix(hor,mid,smoothstep(0.0,0.45,t));
col=mix(col,top,smoothstep(0.35,0.95,t));
vec2 sp=vec2(0.65,0.22);
float sd=length(vUV-sp);
col+=vec3(1.0,0.92,0.65)*0.5*exp(-sd*7.0);
col+=vec3(1.0,0.95,0.8)*0.2*exp(-sd*2.5);
gl_FragColor=vec4(col,1.0);
}`;
// === RING SHADER ===
var RVS = `
precision mediump float;
attribute vec3 aP;
attribute vec3 aRN;
uniform mat4 uVP;
uniform vec3 uCam;
varying float vF;
varying vec3 vRN;
varying vec3 vRP;
void main(){
gl_Position=uVP*vec4(aP,1.0);
vF=clamp(length(aP.xz-uCam.xz)/320.0,0.0,1.0);
vRN=aRN;
vRP=aP;
}`;
var RFS = `
precision mediump float;
varying float vF;
varying vec3 vRN;
varying vec3 vRP;
uniform vec3 uSky;
uniform vec3 uCol;
uniform vec3 uCam;
void main(){
vec3 V=normalize(uCam-vRP);
vec3 L=normalize(vec3(0.3,0.8,0.2));
float diff=0.5+0.5*max(dot(vRN,L),0.0);
float rim=pow(1.0-max(dot(V,vRN),0.0),2.5);
vec3 col=uCol*diff+uCol*rim*0.6+vec3(1.0,0.95,0.8)*rim*0.3;
vec3 fogCol=mix(uSky,vec3(0.95,0.75,0.5),vF*0.4);
col=mix(col,fogCol,vF*vF);
gl_FragColor=vec4(col,1.0);
}`;
function mkS(s, t) {
var o = gl.createShader(t);
gl.shaderSource(o, s);
gl.compileShader(o);
if (!gl.getShaderParameter(o, gl.COMPILE_STATUS)) console.error('Shader:', gl.getShaderInfoLog(o));
return o;
}
function mkP(v, f) {
var p = gl.createProgram();
gl.attachShader(p, mkS(v, gl.VERTEX_SHADER));
gl.attachShader(p, mkS(f, gl.FRAGMENT_SHADER));
gl.linkProgram(p);
if (!gl.getProgramParameter(p, gl.LINK_STATUS)) console.error('Link:', gl.getProgramInfoLog(p));
return p;
}
var prog = mkP(VS, FS), rProg = mkP(RVS, RFS);
var uVP = gl.getUniformLocation(prog, 'uVP');
var uCam = gl.getUniformLocation(prog, 'uCam');
var uSky = gl.getUniformLocation(prog, 'uSky');
var uTime = gl.getUniformLocation(prog, 'uTime');
var lP = gl.getAttribLocation(prog, 'aP');
var lC = gl.getAttribLocation(prog, 'aC');
var lN = gl.getAttribLocation(prog, 'aN');
var ruVP = gl.getUniformLocation(rProg, 'uVP');
var ruCam = gl.getUniformLocation(rProg, 'uCam');
var ruSky = gl.getUniformLocation(rProg, 'uSky');
var ruCol = gl.getUniformLocation(rProg, 'uCol');
var rlP = gl.getAttribLocation(rProg, 'aP');
var rlN = gl.getAttribLocation(rProg, 'aRN');
var skProg = mkP(SKVS, SKFS);
var skAP = gl.getAttribLocation(skProg, 'aPos');
var skBuf = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, skBuf);
gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([-1, -1, 3, -1, -1, 3]), gl.STATIC_DRAW);
gl.enable(gl.DEPTH_TEST);
// === NOISE (Gradient Perlin with smootherstep) ===
var perm = new Uint8Array(512);
(function () { for (var i = 0; i < 256; i++) perm[i] = perm[i + 256] = (i * 1103515245 + 12345) % 256; })();
function grad(h, x, y) {
var u = (h & 1) ? x : -x, v = (h & 2) ? y : -y;
return u + v;
}
function noise(x, y) {
var X = Math.floor(x) & 255, Y = Math.floor(y) & 255;
x -= Math.floor(x); y -= Math.floor(y);
var u = x * x * x * (x * (x * 6 - 15) + 10);
var v = y * y * y * (y * (y * 6 - 15) + 10);
var A = perm[X] + Y, B = perm[X + 1] + Y;
return 0.5 + 0.5 * (
(1 - v) * ((1 - u) * grad(perm[A], x, y) + u * grad(perm[B], x - 1, y)) +
v * ((1 - u) * grad(perm[A + 1], x, y - 1) + u * grad(perm[B + 1], x - 1, y - 1))
);
}
function fbm(x, y, oct) {
var v = 0, a = 1, f = 1, t = 0;
for (var i = 0; i < oct; i++) { v += noise(x * f, y * f) * a; t += a; a *= 0.5; f *= 2.0; }
return v / t;
}
function ter(x, z) {
var s = 0.007;
var h = fbm(x * s, z * s, 4) * 130 - 25;
var r = fbm(x * s * 0.5 + 99, z * s * 0.5 + 99, 2);
if (r > 0.58) h *= 1 + (r - 0.58) * 4;
if (h > 25) {
var rn = (1 - Math.abs(noise(x * s * 3, z * s * 3) * 2 - 1)) * (1 - Math.abs(noise(x * s * 6 + 5, z * s * 6 + 5) * 2 - 1));
h += rn * 22 * Math.min(1, (h - 25) / 50);
}
return h;
}
// === TERRAIN MESH ===
var GS = 167, SP = 5, triCount = GS * GS * 6;
var tData = new Float32Array(triCount * 9);
var tBuf = gl.createBuffer();
var G1 = GS + 1, hg = new Float32Array(G1 * G1), ng = new Float32Array(G1 * G1 * 3), cg = new Float32Array(G1 * G1 * 3);
function hCol(h, sl) {
var B = [[-15, .06, .18, .48], [-6, .1, .28, .55], [-1, .18, .38, .58], [2, .78, .7, .48], [10, .4, .65, .2], [25, .3, .55, .16], [42, .22, .45, .12], [60, .16, .35, .09], [76, .52, .42, .28], [90, .58, .52, .4], [110, .92, .92, .95]];
for (var i = 0; i < B.length - 1; i++) {
if (h < B[i + 1][0]) {
var t = Math.max(0, Math.min(1, (h - B[i][0]) / (B[i + 1][0] - B[i][0]))); t = t * t * (3 - 2 * t);
var r = B[i][1] + (B[i + 1][1] - B[i][1]) * t, g = B[i][2] + (B[i + 1][2] - B[i][2]) * t, b = B[i][3] + (B[i + 1][3] - B[i][3]) * t;
if (sl > 0.4 && h > 5 && h < 85) {
var st = Math.min(1, (sl - 0.4) / 0.3);
r += (0.52 - r) * st; g += (0.43 - g) * st; b += (0.32 - b) * st;
}
return [r, g, b];
}
}
return [.92, .92, .95];
}
function buildTerrain(cx, cz) {
var vi = 0, half = GS * SP / 2;
var ox = Math.floor(cx / SP) * SP - half;
var oz = Math.floor(cz / SP) * SP - half;
// Height grid (each vertex computed once)
for (var j = 0; j <= GS; j++)for (var i = 0; i <= GS; i++)hg[j * G1 + i] = ter(ox + i * SP, oz + j * SP);
// Smooth normals from central differences
for (var j = 0; j <= GS; j++)for (var i = 0; i <= GS; i++) {
var hL = i > 0 ? hg[j * G1 + i - 1] : hg[j * G1 + i], hR = i < GS ? hg[j * G1 + i + 1] : hg[j * G1 + i];
var hD = j > 0 ? hg[(j - 1) * G1 + i] : hg[j * G1 + i], hU = j < GS ? hg[(j + 1) * G1 + i] : hg[j * G1 + i];
var dx = i > 0 && i < GS ? 2 * SP : SP, dz = j > 0 && j < GS ? 2 * SP : SP;
var nx = (hL - hR) / dx, nz = (hD - hU) / dz, ny = 1;
var nl = 1 / Math.sqrt(nx * nx + ny * ny + nz * nz); var k = (j * G1 + i) * 3;
ng[k] = nx * nl; ng[k + 1] = ny * nl; ng[k + 2] = nz * nl;
}
// Per-vertex colors (slope-aware)
for (var j = 0; j <= GS; j++)for (var i = 0; i <= GS; i++) {
var k = (j * G1 + i) * 3; var c = hCol(hg[j * G1 + i], 1 - ng[k + 1]);
cg[k] = c[0]; cg[k + 1] = c[1]; cg[k + 2] = c[2];
}
// Build triangles with smooth normals + per-vertex color
function ev(x, y, z, k) {
tData[vi++] = x; tData[vi++] = y; tData[vi++] = z;
tData[vi++] = cg[k]; tData[vi++] = cg[k + 1]; tData[vi++] = cg[k + 2];
tData[vi++] = ng[k]; tData[vi++] = ng[k + 1]; tData[vi++] = ng[k + 2];
}
for (var j = 0; j < GS; j++) {
for (var i = 0; i < GS; i++) {
var x = ox + i * SP, z = oz + j * SP;
var i00 = j * G1 + i, i10 = j * G1 + i + 1, i01 = (j + 1) * G1 + i, i11 = (j + 1) * G1 + i + 1;
ev(x, hg[i00], z, i00 * 3); ev(x + SP, hg[i10], z, i10 * 3); ev(x, hg[i01], z + SP, i01 * 3);
ev(x + SP, hg[i10], z, i10 * 3); ev(x + SP, hg[i11], z + SP, i11 * 3); ev(x, hg[i01], z + SP, i01 * 3);
}
}
gl.bindBuffer(gl.ARRAY_BUFFER, tBuf);
gl.bufferData(gl.ARRAY_BUFFER, tData, gl.DYNAMIC_DRAW);
}
// === MATRIX MATH ===
function perspective(fov, asp, n, f) {
var t = 1 / Math.tan(fov / 2), r = 1 / (n - f);
return new Float32Array([t / asp, 0, 0, 0, 0, t, 0, 0, 0, 0, (f + n) * r, -1, 0, 0, 2 * f * n * r, 0]);
}
function mulM(a, b) {
var o = new Float32Array(16);
for (var i = 0; i < 4; i++)for (var j = 0; j < 4; j++)
o[j * 4 + i] = a[i] * b[j * 4] + a[4 + i] * b[j * 4 + 1] + a[8 + i] * b[j * 4 + 2] + a[12 + i] * b[j * 4 + 3];
return o;
}
function lookAtMat(ex, ey, ez, tx, ty, tz, rl) {
var fx = tx - ex, fy = ty - ey, fz = tz - ez;
var fl = 1 / Math.sqrt(fx * fx + fy * fy + fz * fz);
fx *= fl; fy *= fl; fz *= fl;
var rx = -fz, ry = 0, rz = fx;
var rlen = 1 / Math.sqrt(rx * rx + rz * rz + .0001);
rx *= rlen; rz *= rlen;
var ux = ry * fz - rz * fy, uy = rz * fx - rx * fz, uz = rx * fy - ry * fx;
if (rl) {
var cr = Math.cos(rl), sr = Math.sin(rl);
var rx2 = rx * cr + ux * sr, ry2 = ry * cr + uy * sr, rz2 = rz * cr + uz * sr;
var ux2 = -rx * sr + ux * cr, uy2 = -ry * sr + uy * cr, uz2 = -rz * sr + uz * cr;
rx = rx2; ry = ry2; rz = rz2; ux = ux2; uy = uy2; uz = uz2;
}
return new Float32Array([
rx, ux, -fx, 0, ry, uy, -fy, 0, rz, uz, -fz, 0,
-(rx * ex + ry * ey + rz * ez), -(ux * ex + uy * ey + uz * ez), fx * ex + fy * ey + fz * ez, 1
]);
}
// === PLANE MESH ===
// Local space: nose=-Z, up=+Y, right=+X
var plTris = [
// Body top-left
0, .4, -4, -.5, 0, .8, 0, .15, 3,
// Body top-right
0, .4, -4, 0, .15, 3, .5, 0, .8,
// Body bot-left
0, -.2, -4, 0, -.1, 3, -.5, 0, .8,
// Body bot-right
0, -.2, -4, .5, 0, .8, 0, -.1, 3,
// Body left
0, .4, -4, -.5, 0, .8, 0, -.2, -4,
// Body right
0, .4, -4, 0, -.2, -4, .5, 0, .8,
// Left wing
-.5, 0, -.3, -6, .2, .8, -.5, 0, 2,
// Right wing
.5, 0, -.3, .5, 0, 2, 6, .2, .8,
// Tail fin
0, .15, 2, 0, 2.2, 3.2, 0, .15, 3.5,
// Left stabilizer
0, .15, 2.5, -2.2, .25, 3.5, 0, .15, 3.5,
// Right stabilizer
0, .15, 2.5, 0, .15, 3.5, 2.2, .25, 3.5
];
// Build local verts with flat normals (pos+norm interleaved)
var plLocal = [];
for (var pi = 0; pi < plTris.length; pi += 9) {
var ax = plTris[pi], ay = plTris[pi + 1], az = plTris[pi + 2];
var bx = plTris[pi + 3], by = plTris[pi + 4], bz = plTris[pi + 5];
var cx = plTris[pi + 6], cy = plTris[pi + 7], cz = plTris[pi + 8];
var eux = bx - ax, euy = by - ay, euz = bz - az, evx = cx - ax, evy = cy - ay, evz = cz - az;
var enx = euy * evz - euz * evy, eny = euz * evx - eux * evz, enz = eux * evy - euy * evx;
var enl = 1 / Math.sqrt(enx * enx + eny * eny + enz * enz + .001);
enx *= enl; eny *= enl; enz *= enl;
plLocal.push(ax, ay, az, enx, eny, enz, bx, by, bz, enx, eny, enz, cx, cy, cz, enx, eny, enz);
}
var plCount = plLocal.length / 6;
var plWorld = new Float32Array(plLocal.length);
var plBuf = gl.createBuffer();
function updatePlane(ppx, ppy, ppz, pi, ya, ro) {
var cp = Math.cos(pi), sp = Math.sin(pi), cy = Math.cos(ya), sy = Math.sin(ya);
var cr = Math.cos(ro), sr = Math.sin(ro);
// Rotation = Ry(yaw) * Rx(pitch) * Rz(roll)
var m00 = cy * cr + sy * sp * sr, m01 = -cy * sr + sy * sp * cr, m02 = sy * cp;
var m10 = cp * sr, m11 = cp * cr, m12 = -sp;
var m20 = -sy * cr + cy * sp * sr, m21 = sy * sr + cy * sp * cr, m22 = cy * cp;
for (var i = 0; i < plLocal.length; i += 6) {
var lx = plLocal[i], ly = plLocal[i + 1], lz = plLocal[i + 2];
plWorld[i] = m00 * lx + m01 * ly + m02 * lz + ppx;
plWorld[i + 1] = m10 * lx + m11 * ly + m12 * lz + ppy;
plWorld[i + 2] = m20 * lx + m21 * ly + m22 * lz + ppz;
var nx = plLocal[i + 3], ny = plLocal[i + 4], nz = plLocal[i + 5];
plWorld[i + 3] = m00 * nx + m01 * ny + m02 * nz;
plWorld[i + 4] = m10 * nx + m11 * ny + m12 * nz;
plWorld[i + 5] = m20 * nx + m21 * ny + m22 * nz;
}
gl.bindBuffer(gl.ARRAY_BUFFER, plBuf);
gl.bufferData(gl.ARRAY_BUFFER, plWorld, gl.DYNAMIC_DRAW);
}
// === HELPER: flat-shaded triangle ===
function addTri(v, a, b, c) {
var ux = b[0] - a[0], uy = b[1] - a[1], uz = b[2] - a[2];
var vx = c[0] - a[0], vy = c[1] - a[1], vz = c[2] - a[2];
var nx = uy * vz - uz * vy, ny = uz * vx - ux * vz, nz = ux * vy - uy * vx;
var nl = 1 / Math.sqrt(nx * nx + ny * ny + nz * nz + .001);
nx *= nl; ny *= nl; nz *= nl;
v.push(a[0], a[1], a[2], nx, ny, nz, b[0], b[1], b[2], nx, ny, nz, c[0], c[1], c[2], nx, ny, nz);
}
// === BALLOON MESH ===
function mkBal(bx, by, bz) {
var v = [], seg = 12;
// Hot air balloon profile: [height_offset, radius]
var prof = [[-1, 1.8], [1, 4.0], [3, 5.2], [5, 5.0], [7, 4.0], [9, 2.0], [10.5, 0]];
for (var si = 0; si < seg; si++) {
var a0 = si / seg * 6.2832, a1 = (si + 1) / seg * 6.2832;
var c0 = Math.cos(a0), s0 = Math.sin(a0), c1 = Math.cos(a1), s1 = Math.sin(a1);
for (var pi = 0; pi < prof.length - 1; pi++) {
var r0 = prof[pi][1], y0 = by + prof[pi][0], r1 = prof[pi + 1][1], y1 = by + prof[pi + 1][0];
addTri(v, [bx + r0 * c0, y0, bz + r0 * s0], [bx + r0 * c1, y0, bz + r0 * s1], [bx + r1 * c0, y1, bz + r1 * s0]);
addTri(v, [bx + r1 * c0, y1, bz + r1 * s0], [bx + r0 * c1, y0, bz + r0 * s1], [bx + r1 * c1, y1, bz + r1 * s1]);
}
}
// Basket with 4 sides
var bs = 1.3, bby = by - 5, bth = bby + 2;
var bcs = [[bx - bs, bz - bs], [bx + bs, bz - bs], [bx + bs, bz + bs], [bx - bs, bz + bs]];
for (var bi = 0; bi < 4; bi++) {
var bn = (bi + 1) % 4;
addTri(v, [bcs[bi][0], bby, bcs[bi][1]], [bcs[bn][0], bby, bcs[bn][1]], [bcs[bn][0], bth, bcs[bn][1]]);
addTri(v, [bcs[bi][0], bby, bcs[bi][1]], [bcs[bn][0], bth, bcs[bn][1]], [bcs[bi][0], bth, bcs[bi][1]]);
}
// Ropes from basket corners to envelope skirt
var rw = 0.1;
for (var ri = 0; ri < 4; ri++) {
var rdx = bcs[ri][0] - bx, rdz = bcs[ri][1] - bz;
var rdl = 1 / Math.sqrt(rdx * rdx + rdz * rdz + .001);
addTri(v, [bcs[ri][0], bth, bcs[ri][1]], [bcs[ri][0] + rw, bth, bcs[ri][1] + rw], [bx + rdx * rdl * 1.5, by - 1, bz + rdz * rdl * 1.5]);
}
var buf = gl.createBuffer(), arr = new Float32Array(v);
gl.bindBuffer(gl.ARRAY_BUFFER, buf);
gl.bufferData(gl.ARRAY_BUFFER, arr, gl.STATIC_DRAW);
return { buf: buf, cnt: arr.length / 6 };
}
// === TREE MESH ===
var trees = [], houses = [], treeCellSize = 25;
var lastTreeCX = -9999, lastTreeCZ = -9999;
// Type 1: Cone tree (pine)
function mkTree(tx, ty, tz, seed) {
var v = [];
var th = 4 + (seed * 2);
var tw = 0.4;
var trunkVerts = [
[tx - tw, ty, tz + tw], [tx + tw, ty, tz + tw], [tx + tw, ty + th, tz + tw],
[tx - tw, ty, tz + tw], [tx + tw, ty + th, tz + tw], [tx - tw, ty + th, tz + tw],
[tx + tw, ty, tz - tw], [tx - tw, ty, tz - tw], [tx - tw, ty + th, tz - tw],
[tx + tw, ty, tz - tw], [tx - tw, ty + th, tz - tw], [tx + tw, ty + th, tz - tw],
[tx - tw, ty, tz - tw], [tx - tw, ty, tz + tw], [tx - tw, ty + th, tz + tw],
[tx - tw, ty, tz - tw], [tx - tw, ty + th, tz + tw], [tx - tw, ty + th, tz - tw],
[tx + tw, ty, tz + tw], [tx + tw, ty, tz - tw], [tx + tw, ty + th, tz - tw],
[tx + tw, ty, tz + tw], [tx + tw, ty + th, tz - tw], [tx + tw, ty + th, tz + tw]
];
for (var i = 0; i < trunkVerts.length; i += 3) {
addTri(v, trunkVerts[i], trunkVerts[i + 1], trunkVerts[i + 2]);
}
var fr = 2.5 + seed * 1, fh = 5 + seed * 2;
var fy = ty + th;
var seg = 8;
for (var si = 0; si < seg; si++) {
var a0 = si / seg * 6.2832, a1 = (si + 1) / seg * 6.2832;
var c0 = Math.cos(a0), s0 = Math.sin(a0), c1 = Math.cos(a1), s1 = Math.sin(a1);
addTri(v, [tx, fy + fh, tz], [tx + fr * c1, fy, tz + fr * s1], [tx + fr * c0, fy, tz + fr * s0]);
addTri(v, [tx, fy, tz], [tx + fr * c0, fy, tz + fr * s0], [tx + fr * c1, fy, tz + fr * s1]);
}
var buf = gl.createBuffer(), arr = new Float32Array(v);
gl.bindBuffer(gl.ARRAY_BUFFER, buf);
gl.bufferData(gl.ARRAY_BUFFER, arr, gl.STATIC_DRAW);
return { buf: buf, cnt: arr.length / 6, trunkCnt: 24 };
}
// Type 2: Round tree (deciduous)
function mkTreeRound(tx, ty, tz, seed) {
var v = [];
var th = 3 + seed * 2, tw = 0.35;
var trunkVerts = [
[tx - tw, ty, tz + tw], [tx + tw, ty, tz + tw], [tx + tw, ty + th, tz + tw],
[tx - tw, ty, tz + tw], [tx + tw, ty + th, tz + tw], [tx - tw, ty + th, tz + tw],
[tx + tw, ty, tz - tw], [tx - tw, ty, tz - tw], [tx - tw, ty + th, tz - tw],
[tx + tw, ty, tz - tw], [tx - tw, ty + th, tz - tw], [tx + tw, ty + th, tz - tw],
[tx - tw, ty, tz - tw], [tx - tw, ty, tz + tw], [tx - tw, ty + th, tz + tw],
[tx - tw, ty, tz - tw], [tx - tw, ty + th, tz + tw], [tx - tw, ty + th, tz - tw],
[tx + tw, ty, tz + tw], [tx + tw, ty, tz - tw], [tx + tw, ty + th, tz - tw],
[tx + tw, ty, tz + tw], [tx + tw, ty + th, tz - tw], [tx + tw, ty + th, tz + tw]
];
for (var i = 0; i < trunkVerts.length; i += 3) {
addTri(v, trunkVerts[i], trunkVerts[i + 1], trunkVerts[i + 2]);
}
// Spherical foliage
var fr = 2.2 + seed * 0.8, fy = ty + th + fr * 0.6;
var segV = 4, segH = 6;
for (var vi = 0; vi < segV; vi++) {
var phi0 = vi / segV * 3.1416, phi1 = (vi + 1) / segV * 3.1416;
var r0 = Math.sin(phi0) * fr, y0 = fy + Math.cos(phi0) * fr;
var r1 = Math.sin(phi1) * fr, y1 = fy + Math.cos(phi1) * fr;
for (var hi = 0; hi < segH; hi++) {
var t0 = hi / segH * 6.2832, t1 = (hi + 1) / segH * 6.2832;
addTri(v, [tx + r0 * Math.cos(t0), y0, tz + r0 * Math.sin(t0)],
[tx + r1 * Math.cos(t0), y1, tz + r1 * Math.sin(t0)],
[tx + r1 * Math.cos(t1), y1, tz + r1 * Math.sin(t1)]);
addTri(v, [tx + r0 * Math.cos(t0), y0, tz + r0 * Math.sin(t0)],
[tx + r1 * Math.cos(t1), y1, tz + r1 * Math.sin(t1)],
[tx + r0 * Math.cos(t1), y0, tz + r0 * Math.sin(t1)]);
}
}
var buf = gl.createBuffer(), arr = new Float32Array(v);
gl.bindBuffer(gl.ARRAY_BUFFER, buf);
gl.bufferData(gl.ARRAY_BUFFER, arr, gl.STATIC_DRAW);
return { buf: buf, cnt: arr.length / 6, trunkCnt: 24 };
}
// Type 3: Tall pine (multiple cone layers)
function mkTreeTall(tx, ty, tz, seed) {
var v = [];
var th = 6 + seed * 3, tw = 0.3;
var trunkVerts = [
[tx - tw, ty, tz + tw], [tx + tw, ty, tz + tw], [tx + tw, ty + th, tz + tw],
[tx - tw, ty, tz + tw], [tx + tw, ty + th, tz + tw], [tx - tw, ty + th, tz + tw],
[tx + tw, ty, tz - tw], [tx - tw, ty, tz - tw], [tx - tw, ty + th, tz - tw],
[tx + tw, ty, tz - tw], [tx - tw, ty + th, tz - tw], [tx + tw, ty + th, tz - tw],
[tx - tw, ty, tz - tw], [tx - tw, ty, tz + tw], [tx - tw, ty + th, tz + tw],
[tx - tw, ty, tz - tw], [tx - tw, ty + th, tz + tw], [tx - tw, ty + th, tz - tw],
[tx + tw, ty, tz + tw], [tx + tw, ty, tz - tw], [tx + tw, ty + th, tz - tw],
[tx + tw, ty, tz + tw], [tx + tw, ty + th, tz - tw], [tx + tw, ty + th, tz + tw]
];
for (var i = 0; i < trunkVerts.length; i += 3) {
addTri(v, trunkVerts[i], trunkVerts[i + 1], trunkVerts[i + 2]);
}
// Multiple cone layers
var seg = 6;
for (var layer = 0; layer < 3; layer++) {
var lr = 2.0 - layer * 0.4, lh = 2.5;
var ly = ty + th * 0.4 + layer * 2;
for (var si = 0; si < seg; si++) {
var a0 = si / seg * 6.2832, a1 = (si + 1) / seg * 6.2832;
var c0 = Math.cos(a0), s0 = Math.sin(a0), c1 = Math.cos(a1), s1 = Math.sin(a1);
addTri(v, [tx, ly + lh, tz], [tx + lr * c1, ly, tz + lr * s1], [tx + lr * c0, ly, tz + lr * s0]);
}
}
var buf = gl.createBuffer(), arr = new Float32Array(v);
gl.bindBuffer(gl.ARRAY_BUFFER, buf);
gl.bufferData(gl.ARRAY_BUFFER, arr, gl.STATIC_DRAW);
return { buf: buf, cnt: arr.length / 6, trunkCnt: 24 };
}
function mkHouse(hx, hy, hz) {
var v = [];
var hw = 3, hh = 4, hd = 4;
var wallVerts = [
[hx - hw, hy, hz + hd], [hx + hw, hy, hz + hd], [hx + hw, hy + hh, hz + hd],
[hx - hw, hy, hz + hd], [hx + hw, hy + hh, hz + hd], [hx - hw, hy + hh, hz + hd],
[hx + hw, hy, hz - hd], [hx - hw, hy, hz - hd], [hx - hw, hy + hh, hz - hd],
[hx + hw, hy, hz - hd], [hx - hw, hy + hh, hz - hd], [hx + hw, hy + hh, hz - hd],
[hx - hw, hy, hz - hd], [hx - hw, hy, hz + hd], [hx - hw, hy + hh, hz + hd],
[hx - hw, hy, hz - hd], [hx - hw, hy + hh, hz + hd], [hx - hw, hy + hh, hz - hd],
[hx + hw, hy, hz + hd], [hx + hw, hy, hz - hd], [hx + hw, hy + hh, hz - hd],
[hx + hw, hy, hz + hd], [hx + hw, hy + hh, hz - hd], [hx + hw, hy + hh, hz + hd]
];
for (var i = 0; i < wallVerts.length; i += 3) {
addTri(v, wallVerts[i], wallVerts[i + 1], wallVerts[i + 2]);
}
var wallCnt = 24;
var rh = 3;
addTri(v, [hx - hw, hy + hh, hz + hd], [hx + hw, hy + hh, hz + hd], [hx, hy + hh + rh, hz + hd]);
addTri(v, [hx + hw, hy + hh, hz - hd], [hx - hw, hy + hh, hz - hd], [hx, hy + hh + rh, hz - hd]);
addTri(v, [hx - hw, hy + hh, hz - hd], [hx - hw, hy + hh, hz + hd], [hx, hy + hh + rh, hz + hd]);
addTri(v, [hx - hw, hy + hh, hz - hd], [hx, hy + hh + rh, hz + hd], [hx, hy + hh + rh, hz - hd]);
addTri(v, [hx + hw, hy + hh, hz + hd], [hx + hw, hy + hh, hz - hd], [hx, hy + hh + rh, hz - hd]);
addTri(v, [hx + hw, hy + hh, hz + hd], [hx, hy + hh + rh, hz - hd], [hx, hy + hh + rh, hz + hd]);
var buf = gl.createBuffer(), arr = new Float32Array(v);
gl.bindBuffer(gl.ARRAY_BUFFER, buf);
gl.bufferData(gl.ARRAY_BUFFER, arr, gl.STATIC_DRAW);
return { buf: buf, cnt: arr.length / 6, wallCnt: wallCnt };
}
function treeHash(x, z) {
var n = (x * 374761393 + z * 668265263) | 0;
n = Math.imul(n ^ (n >>> 13), 1274126177);
return ((n ^ (n >>> 16)) >>> 0) / 4294967296;
}
function buildTrees(cx, cz) {
var cellX = Math.floor(cx / treeCellSize);
var cellZ = Math.floor(cz / treeCellSize);
if (cellX === lastTreeCX && cellZ === lastTreeCZ) return;
lastTreeCX = cellX; lastTreeCZ = cellZ;
trees.forEach(function (t) { gl.deleteBuffer(t.buf); });
houses.forEach(function (h) { gl.deleteBuffer(h.buf); });
trees = []; houses = [];
var range = 12;
for (var dz = -range; dz <= range; dz++) {
for (var dx = -range; dx <= range; dx++) {
var gx = (cellX + dx) * treeCellSize;
var gz = (cellZ + dz) * treeCellSize;
var h = treeHash(cellX + dx, cellZ + dz);
var h2 = treeHash(cellZ + dz, cellX + dx);
var ox = h * treeCellSize * 0.8;
var oz = h2 * treeCellSize * 0.8;
var tx = gx + ox, tz = gz + oz;
var ty = ter(tx, tz);
if (ty < 5 || ty > 60) continue;
var ddx = tx - cx, ddz = tz - cz;
if (ddx * ddx + ddz * ddz > 300 * 300) continue;
// Decide: house (3%) or trees (67%) or nothing (30%)
if (h < 0.03) {
houses.push(mkHouse(tx, ty, tz));
} else if (h < 0.7) {
// Pick tree type based on h2
if (h2 < 0.33) {
trees.push(mkTree(tx, ty, tz, h2));
} else if (h2 < 0.66) {
trees.push(mkTreeRound(tx, ty, tz, h2));
} else {
trees.push(mkTreeTall(tx, ty, tz, h2));
}
}
}
}
}
// === PROJECTILE MESH (octahedron, local space) ===
// Balloon projectiles (big)
var pjL = [], pjR = 1.5;
var pjV = [[0, pjR, 0], [pjR, 0, 0], [0, 0, pjR], [-pjR, 0, 0], [0, 0, -pjR], [0, -pjR, 0]];
var pjF = [[0, 1, 2], [0, 2, 3], [0, 3, 4], [0, 4, 1], [5, 2, 1], [5, 3, 2], [5, 4, 3], [5, 1, 4]];
for (var qi = 0; qi < pjF.length; qi++) { var qf = pjF[qi]; addTri(pjL, pjV[qf[0]], pjV[qf[1]], pjV[qf[2]]); }
var pjVPP = pjL.length / 6;
var MAXPJ = 40, pjBuf = gl.createBuffer(), pjArr = new Float32Array(MAXPJ * pjL.length);
function buildProjBuf() {
var n = Math.min(projs.length, MAXPJ);
for (var i = 0; i < n; i++) {
var p = projs[i], off = i * pjL.length;
for (var j = 0; j < pjL.length; j += 6) {
pjArr[off + j] = pjL[j] + p.x; pjArr[off + j + 1] = pjL[j + 1] + p.y; pjArr[off + j + 2] = pjL[j + 2] + p.z;
pjArr[off + j + 3] = pjL[j + 3]; pjArr[off + j + 4] = pjL[j + 4]; pjArr[off + j + 5] = pjL[j + 5];
}
}
gl.bindBuffer(gl.ARRAY_BUFFER, pjBuf);
gl.bufferData(gl.ARRAY_BUFFER, pjArr.subarray(0, n * pjL.length), gl.DYNAMIC_DRAW);
return n * pjVPP;
}
// === PLAYER PROJECTILE MESH (small) ===
var ppL = [], ppR = 0.6;
var ppV = [[0, ppR, 0], [ppR, 0, 0], [0, 0, ppR], [-ppR, 0, 0], [0, 0, -ppR], [0, -ppR, 0]];
for (var qi = 0; qi < pjF.length; qi++) { var qf = pjF[qi]; addTri(ppL, ppV[qf[0]], ppV[qf[1]], ppV[qf[2]]); }
var ppVPP = ppL.length / 6;
var MAXPP = 20, ppBuf = gl.createBuffer(), ppArr = new Float32Array(MAXPP * ppL.length);
function buildPPBuf() {
var n = Math.min(pProjs.length, MAXPP);
for (var i = 0; i < n; i++) {
var p = pProjs[i], off = i * ppL.length;
for (var j = 0; j < ppL.length; j += 6) {
ppArr[off + j] = ppL[j] + p.x; ppArr[off + j + 1] = ppL[j + 1] + p.y; ppArr[off + j + 2] = ppL[j + 2] + p.z;
ppArr[off + j + 3] = ppL[j + 3]; ppArr[off + j + 4] = ppL[j + 4]; ppArr[off + j + 5] = ppL[j + 5];
}
}
gl.bindBuffer(gl.ARRAY_BUFFER, ppBuf);
gl.bufferData(gl.ARRAY_BUFFER, ppArr.subarray(0, n * ppL.length), gl.DYNAMIC_DRAW);
return n * ppVPP;
}
// === GAME STATE ===
var state = 0, px = 0, py = 80, pz = 0;
var pitch = 0, yaw = 0, roll = 0;
var speed = 40, score = 0, dist = 0, streak = 0, mult = 1;
var touchX = 0, touchY = 0, touching = false;
var lastT = 0, crashT = 0, gameTime = 0;
var camX = 0, camY = 88, camZ = 22;
var collectFlash = 0;
var bestScore = 0;
var shakeX = 0, shakeY = 0;
var hp = 3, invT = 0;
var bals = [], projs = [];
var pProjs = [], shootCD = 0, aimTarget = -1;
var BCOUNT = 7;
var bCols = [[.9, .15, .1], [.2, .35, .85], [.1, .7, .25], [.85, .5, .9], [.95, .6, .1]];
function spawnBal() {
var ang = yaw + (Math.random() - 0.5) * 1.0;
var d = 100 + Math.random() * 180;
var bx = px - Math.sin(ang) * d;
var bz = pz - Math.cos(ang) * d;
var th = ter(bx, bz);
var by = Math.max(th + 15, 35) + Math.random() * 30;
var ci = Math.floor(Math.random() * bCols.length);
bals.push({ x: bx, y: by, z: bz, m: mkBal(bx, by, bz), st: 1.5 + Math.random() * 2, c: bCols[ci] });
}
function initBals() {
bals.forEach(function (b) { gl.deleteBuffer(b.m.buf); });
bals = []; projs = [];
}
// === AUDIO ===
var ac, eG, wG, mG, eo1, eo2;
function initAudio() {
try {
ac = new (window.AudioContext || window.webkitAudioContext)();
mG = ac.createGain(); mG.gain.value = 0.3; mG.connect(ac.destination);
eG = ac.createGain(); eG.gain.value = 0.1; eG.connect(mG);
eo1 = ac.createOscillator(); eo1.type = 'sawtooth'; eo1.frequency.value = 75; eo1.connect(eG); eo1.start();
eo2 = ac.createOscillator(); eo2.type = 'triangle'; eo2.frequency.value = 113; eo2.connect(eG); eo2.start();
var bs = ac.sampleRate * 2, ab = ac.createBuffer(1, bs, ac.sampleRate), ch = ab.getChannelData(0);
for (var i = 0; i < bs; i++)ch[i] = Math.random() * 2 - 1;
var wn = ac.createBufferSource(); wn.buffer = ab; wn.loop = true;
wG = ac.createGain(); wG.gain.value = 0.03;
wn.connect(wG); wG.connect(mG); wn.start();
} catch (e) { }
}
function sfxCrash() {
if (!ac) return;
var bs = ac.sampleRate, ab = ac.createBuffer(1, bs, ac.sampleRate), ch = ab.getChannelData(0);
for (var i = 0; i < bs; i++)ch[i] = (Math.random() * 2 - 1) * Math.exp(-i / bs * 3);
var s = ac.createBufferSource(); s.buffer = ab;
var g = ac.createGain(); g.gain.value = 0.5; s.connect(g); g.connect(mG); s.start();
// Low boom
var o = ac.createOscillator(), g2 = ac.createGain(), t = ac.currentTime;
o.type = 'sine'; o.frequency.setValueAtTime(80, t); o.frequency.exponentialRampToValueAtTime(20, t + 0.5);
g2.gain.setValueAtTime(0.4, t); g2.gain.exponentialRampToValueAtTime(0.001, t + 0.6);
o.connect(g2); g2.connect(mG); o.start(t); o.stop(t + 0.6);
}
function sfxWarn() {
if (!ac) return;
var o = ac.createOscillator(), g = ac.createGain(), t = ac.currentTime;
o.type = 'square'; o.frequency.value = 440;
g.gain.setValueAtTime(0.08, t); g.gain.exponentialRampToValueAtTime(0.001, t + 0.1);
o.connect(g); g.connect(mG); o.start(t); o.stop(t + 0.1);
}
function sfxShoot() {
if (!ac) return;
var o = ac.createOscillator(), g = ac.createGain(), t = ac.currentTime;
o.type = 'sawtooth'; o.frequency.setValueAtTime(220, t); o.frequency.exponentialRampToValueAtTime(60, t + 0.15);
g.gain.setValueAtTime(0.1, t); g.gain.exponentialRampToValueAtTime(0.001, t + 0.2);
o.connect(g); g.connect(mG); o.start(t); o.stop(t + 0.2);
}
function sfxHit() {
if (!ac) return; var t = ac.currentTime;
var o = ac.createOscillator(), g = ac.createGain();
o.type = 'square'; o.frequency.setValueAtTime(300, t); o.frequency.exponentialRampToValueAtTime(80, t + 0.2);
g.gain.setValueAtTime(0.25, t); g.gain.exponentialRampToValueAtTime(0.001, t + 0.3);
o.connect(g); g.connect(mG); o.start(t); o.stop(t + 0.3);
}
function sfxPShoot() {
if (!ac) return; var t = ac.currentTime;
var o = ac.createOscillator(), g = ac.createGain();
o.type = 'sine'; o.frequency.setValueAtTime(880, t); o.frequency.exponentialRampToValueAtTime(440, t + 0.08);
g.gain.setValueAtTime(0.12, t); g.gain.exponentialRampToValueAtTime(0.001, t + 0.12);
o.connect(g); g.connect(mG); o.start(t); o.stop(t + 0.12);
}
function sfxBoom() {
if (!ac) return; var t = ac.currentTime;
var bs = ac.sampleRate / 2, ab = ac.createBuffer(1, bs, ac.sampleRate), ch = ab.getChannelData(0);
for (var i = 0; i < bs; i++)ch[i] = (Math.random() * 2 - 1) * Math.exp(-i / bs * 4);
var s = ac.createBufferSource(); s.buffer = ab;
var g = ac.createGain(); g.gain.value = 0.35; s.connect(g); g.connect(mG); s.start();
var o = ac.createOscillator(), g2 = ac.createGain();
o.type = 'sine'; o.frequency.setValueAtTime(120, t); o.frequency.exponentialRampToValueAtTime(30, t + 0.3);
g2.gain.setValueAtTime(0.3, t); g2.gain.exponentialRampToValueAtTime(0.001, t + 0.4);
o.connect(g2); g2.connect(mG); o.start(t); o.stop(t + 0.4);
}
// === TOUCH ===
function tpos(e) { var t = e.touches ? e.touches[0] : e; return { x: t.clientX, y: t.clientY }; }
function onD(e) {
e.preventDefault();
if (state === 0) { state = 1; M.style.display = 'none'; initAudio(); return; }
if (state === 2 && crashT > 1.5) { resetGame(); return; }
touching = true; var t = tpos(e); touchX = t.x; touchY = t.y;
}
function onM(e) { e.preventDefault(); if (!touching) return; var t = tpos(e); touchX = t.x; touchY = t.y; }
function onU(e) { e.preventDefault(); touching = false; }
document.addEventListener('touchstart', onD, { passive: false });
document.addEventListener('touchmove', onM, { passive: false });
document.addEventListener('touchend', onU, { passive: false });
document.addEventListener('mousedown', onD);
document.addEventListener('mousemove', function (e) { if (touching) { touchX = e.clientX; touchY = e.clientY; } });
document.addEventListener('mouseup', onU);
function resetGame() {
px = 0; py = 80; pz = 0; pitch = 0; yaw = 0; roll = 0;
speed = 40; score = 0; dist = 0; streak = 0; mult = 1; crashT = 0; gameTime = 0;
collectFlash = 0; shakeX = 0; shakeY = 0; hp = 3; invT = 0;
pProjs = []; shootCD = 0; aimTarget = -1;
state = 1; M.style.display = 'none';
initBals();
if (eG) eG.gain.value = 0.1;
if (wG) wG.gain.value = 0.03;
}
// === UPDATE ===
var warnTimer = 0;
function update(dt) {
if (state !== 1) return;
gameTime += dt;
collectFlash = Math.max(0, collectFlash - dt * 3);
// Input
if (touching) {
var dx = (touchX - W / 2) / (W / 2);
var dy = (touchY - Ht / 2) / (Ht / 2);
var dead = 0.05;
var ax = Math.abs(dx) > dead ? (dx > 0 ? dx - dead : dx + dead) : 0;
var ay = Math.abs(dy) > dead ? (dy > 0 ? dy - dead : dy + dead) : 0;
// Smooth exponential approach
var targetRoll = -ax * 1.5;
var targetPitch = ay * 1.0;
roll += (targetRoll - roll) * Math.min(3.5 * dt, 1);
pitch += (targetPitch - pitch) * Math.min(2.5 * dt, 1);
} else {
roll += -roll * Math.min(4 * dt, 1);
pitch += -pitch * Math.min(3 * dt, 1);
}
pitch = Math.max(-1.0, Math.min(1.0, pitch));
roll = Math.max(-1.3, Math.min(1.3, roll));
yaw += roll * 1.0 * dt;
speed = 45 + dist * 0.002;
if (speed > 120) speed = 120;
var fx = -Math.sin(yaw) * Math.cos(pitch);
var fy = Math.sin(pitch);
var fz = -Math.cos(yaw) * Math.cos(pitch);
px += fx * speed * dt;
py += fy * speed * dt;
pz += fz * speed * dt;
// Gravity & lift
var grav = 10 * dt * 0.45;
py -= grav;
var lev = 1 - Math.abs(pitch) * 0.7 - Math.abs(roll) * 0.25;
if (lev > 0) py += grav * lev;
// Altitude check
var th = ter(px, pz);
var alt = py - th;
// Low altitude warning
warnTimer -= dt;
if (alt < 15 && alt > 2 && warnTimer <= 0) { sfxWarn(); warnTimer = 0.5; }
// Crash
if (alt < 2) {
state = 2; crashT = 0; sfxCrash();
if (score > bestScore) bestScore = score;
shakeX = 3; shakeY = 3;
M.innerHTML = '<h1>CRASHED!</h1><div class="s">Score: ' + score + '</div><div class="s">Distance: ' + Math.floor(dist) + 'm</div>' + (bestScore > 0 ? '<p style="color:#f90">Best: ' + bestScore + '</p>' : '') + '<p style="margin-top:.5em">Tap to restart</p>';
M.style.display = 'flex';
if (eG) { eG.gain.value = 0; wG.gain.value = 0; }
return;
}
dist += speed * dt;
// Audio modulation
if (eo1) {
var sf = speed / 80;
eo1.frequency.value = 50 + sf * 50;
eo2.frequency.value = 78 + sf * 70;
eG.gain.value = 0.05 + sf * 0.06;
wG.gain.value = 0.015 + sf * 0.04;
}
// Screen shake decay
shakeX *= Math.pow(0.01, dt); shakeY *= Math.pow(0.01, dt);
// Spawn balloons
while (bals.length < BCOUNT) spawnBal();
for (var i = bals.length - 1; i >= 0; i--) {
var b = bals[i];
b.st -= dt;
if (b.st <= 0) {
b.st = 2.2 + Math.random() * 1.5;
var ddx = px - b.x, ddy = py - b.y - 4, ddz = pz - b.z;
var ddl = 1 / Math.sqrt(ddx * ddx + ddy * ddy + ddz * ddz + .001);
var ps = 100;
projs.push({ x: b.x, y: b.y + 4, z: b.z, vx: ddx * ddl * ps, vy: ddy * ddl * ps, vz: ddz * ddl * ps, life: 4.5 });
sfxShoot();
}
var beh = Math.sin(yaw) * (b.x - px) + Math.cos(yaw) * (b.z - pz);
if (beh > 220) { gl.deleteBuffer(b.m.buf); bals.splice(i, 1); }
}
// Projectiles
invT = Math.max(0, invT - dt);
for (var i = projs.length - 1; i >= 0; i--) {
var pr = projs[i];
pr.x += pr.vx * dt; pr.y += pr.vy * dt; pr.z += pr.vz * dt;
pr.life -= dt;
if (pr.life <= 0) { projs.splice(i, 1); continue; }
if (invT <= 0) {
var hx = px - pr.x, hy = py - pr.y, hz = pz - pr.z;
if (hx * hx + hy * hy + hz * hz < 36) {
hp--; invT = 1.5; shakeX = 2; shakeY = 2; sfxHit(); streak = 0; mult = 1; projs.splice(i, 1);
if (hp <= 0) {
state = 2; crashT = 0; sfxCrash();
if (score > bestScore) bestScore = score;
M.innerHTML = '<h1>SHOT DOWN!</h1><div class="s">Score: ' + score + '</div><div class="s">Distance: ' + Math.floor(dist) + 'm</div>' + (bestScore > 0 ? '<p style="color:#f90">Best: ' + bestScore + '</p>' : '') + '<p style="margin-top:.5em">Tap to restart</p>';
M.style.display = 'flex';
if (eG) { eG.gain.value = 0; wG.gain.value = 0; }
return;
}
}
}
}
// Auto-aim + shoot at balloons
shootCD = Math.max(0, shootCD - dt);
aimTarget = -1;
var bestDot = -1;
for (var i = 0; i < bals.length; i++) {
var b = bals[i];
var adx = b.x - px, ady = b.y + 4 - py, adz = b.z - pz;
var adl = 1 / Math.sqrt(adx * adx + ady * ady + adz * adz + .001);
var dot = -(adx * adl * Math.sin(yaw) * Math.cos(pitch)) + ady * adl * Math.sin(pitch) + -(adz * adl * Math.cos(yaw) * Math.cos(pitch));
if (dot > 0.94 && dot > bestDot) { bestDot = dot; aimTarget = i; }
}
if (aimTarget >= 0 && shootCD <= 0 && pProjs.length < MAXPP) {
shootCD = 0.25;
var tb = bals[aimTarget];
var sdx = tb.x - px, sdy = tb.y + 4 - py, sdz = tb.z - pz;
var sdl = 1 / Math.sqrt(sdx * sdx + sdy * sdy + sdz * sdz + .001);
var ps = 130;
pProjs.push({ x: px + fx * 5, y: py, z: pz + fz * 5, vx: sdx * sdl * ps, vy: sdy * sdl * ps, vz: sdz * sdl * ps, life: 3 });
sfxPShoot();