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Rework landscape and airplane: realistic flight look, detailed 3D airplane

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Richard Zink committed 2026-10-06 16:11:29 +02:00
1 parent dc8e745ed4
commit e93a8e5f32
1 file changed
+171 -123
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assets/index.html
+171 -123
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@@ -37,22 +37,23 @@
height = canvas.height = window.innerHeight; height = canvas.height = window.innerHeight;
} }
function rotatePoint(point, angle) {
const cos = Math.cos(angle);
const sin = Math.sin(angle);
return {
x: point.x * cos - point.z * sin,
z: point.x * sin + point.z * cos
};
}
window.addEventListener('resize', resize); window.addEventListener('resize', resize);
resize(); resize();
const camera = { const camera = {
fov: 600 fov: 800
}; };
function rotateY(point, angle) {
const cos = Math.cos(angle);
const sin = Math.sin(angle);
return {
x: point.x * cos - point.z * sin,
y: point.y,
z: point.x * sin + point.z * cos
};
}
class Point3D { class Point3D {
constructor(x, y, z) { constructor(x, y, z) {
this.x = x; this.x = x;
@@ -61,22 +62,21 @@
} }
project() { project() {
const rotated = rotatePoint(this, Math.PI);
const scale = camera.fov / (camera.fov + this.z); const scale = camera.fov / (camera.fov + this.z);
const xIso = rotated.x - rotated.z; const xIso = this.x - this.z;
const yIso = (rotated.x + rotated.z) * 0.5; const yIso = (this.x + this.z) * 0.5 - this.y;
const x2d = xIso * scale + width / 2; const x2d = xIso * scale + width / 2;
const y2d = yIso * scale + height / 2; const y2d = yIso * scale + height / 2;
return { x: x2d, y: y2d, scale: scale }; return { x: x2d, y: y2d, scale: scale };
} }
} }
class Triangle { class TriangleMesh {
constructor(p1, p2, p3) { constructor(p1, p2, p3, color) {
this.p1 = p1; this.p1 = p1;
this.p2 = p2; this.p2 = p2;
this.p3 = p3; this.p3 = p3;
this.calculateNormal(); this.color = color;
} }
calculateNormal() { calculateNormal() {
@@ -93,88 +93,71 @@
this.normal.y /= len; this.normal.y /= len;
this.normal.z /= len; this.normal.z /= len;
} }
const light = { x: 0.3, y: 0.3, z: 0.8 }; const light = { x: 0.3, y: 0.5, z: 0.8 };
const dot = this.normal.x * light.x + this.normal.y * light.y + this.normal.z * light.z; const dot = this.normal.x * light.x + this.normal.y * light.y + this.normal.z * light.z;
this.intensity = Math.max(0.2, dot); this.intensity = Math.max(0.15, dot);
} }
isBackfaceCulled() { isBackface() {
const v1 = { x: this.p2.x - this.p1.x, y: this.p2.y - this.p1.y, z: this.p2.z - this.p1.z }; return this.normal.y > 0.5;
const v2 = { x: this.p3.x - this.p1.x, y: this.p3.y - this.p1.y, z: this.p3.z - this.p1.z };
const crossZ = v1.x * v2.y - v1.y * v2.x;
return crossZ >= 0;
} }
drawFilled() { draw() {
if (this.isBackface()) return;
const proj1 = this.p1.project(); const proj1 = this.p1.project();
const proj2 = this.p2.project(); const proj2 = this.p2.project();
const proj3 = this.p3.project(); const proj3 = this.p3.project();
if (this.isBackfaceCulled()) return; const colorVal = Math.floor(this.intensity * 200);
const r = this.color.r || 0;
const colorVal = Math.floor(20 + this.intensity * 180); const g = this.color.g || (this.color.isWater ? 100 : colorVal);
const color = this.p1.isWater || this.p2.isWater || this.p3.isWater const b = this.color.b || (this.color.isWater ? 200 : 0);
? `rgba(0, ${Math.floor(colorVal * 0.8)}, ${colorVal + 50}, 0.7)` const fillColor = `rgba(${Math.floor(r * this.intensity)}, ${Math.floor(g * this.intensity)}, ${Math.floor(b * this.intensity)}, 0.85)`;
: `rgba(0, ${colorVal}, 0, 0.7)`;
ctx.beginPath(); ctx.beginPath();
ctx.moveTo(proj1.x, proj1.y); ctx.moveTo(proj1.x, proj1.y);
ctx.lineTo(proj2.x, proj2.y); ctx.lineTo(proj2.x, proj2.y);
ctx.lineTo(proj3.x, proj3.y); ctx.lineTo(proj3.x, proj3.y);
ctx.closePath(); ctx.closePath();
ctx.fillStyle = color; ctx.fillStyle = fillColor;
ctx.fill(); ctx.fill();
}
drawWireframe() { ctx.strokeStyle = this.color.isWater ? '#00ccff' : (this.color.r ? '#ff3333' : '#00ff66');
const proj1 = this.p1.project();
const proj2 = this.p2.project();
const proj3 = this.p3.project();
if (this.isBackfaceCulled()) return;
const color = this.p1.isWater || this.p2.isWater || this.p3.isWater ? '#00ccff' : '#00ff00';
ctx.strokeStyle = color;
ctx.lineWidth = 1; ctx.lineWidth = 1;
ctx.beginPath();
ctx.moveTo(proj1.x, proj1.y);
ctx.lineTo(proj2.x, proj2.y);
ctx.lineTo(proj3.x, proj3.y);
ctx.closePath();
ctx.stroke(); ctx.stroke();
} }
} }
class Landscape { class Landscape {
constructor() { constructor() {
this.gridSize = 100; this.gridSize = 120;
this.gridRange = 30; this.gridRange = 30;
this.offsetX = 0; this.offsetX = 0;
this.offsetZ = 0; this.offsetZ = 0;
this.triangles = []; this.triangles = [];
this.waterLevel = 50; this.waterLevel = 20;
} }
generateHeight(x, z) { generateHeight(x, z) {
const nx = x / 200; const nx = x / 300;
const nz = z / 200; const nz = z / 300;
let y = 0; let y = 0;
y += Math.sin(nx) * 40; y += Math.sin(nx * 0.7) * 60;
y += Math.cos(nz) * 40; y += Math.cos(nz * 0.7) * 60;
y += Math.sin(nx * 2 + nz * 0.5) * 20; y += Math.sin(nx * 1.5 + nz * 0.3) * 30;
y += Math.cos(nz * 2 - nx) * 20; y += Math.cos(nz * 1.5 - nx * 0.4) * 25;
y += Math.sin(nx * 3 - nz * 2) * 10; y += Math.sin(nx * 2.5 - nz * 1.8) * 10;
return y; return y;
} }
isWater(x, z, y) { isWater(y) {
return y < this.waterLevel; return y < this.waterLevel;
} }
update() { update() {
this.offsetX -= 2; this.offsetX -= 1.5;
this.offsetZ -= 1; this.offsetZ -= 0.7;
this.generateTriangles(); this.generateTriangles();
} }
@@ -190,103 +173,168 @@
const p3 = this.getPoint(x + 1, z + 1); const p3 = this.getPoint(x + 1, z + 1);
const p4 = this.getPoint(x, z + 1); const p4 = this.getPoint(x, z + 1);
const tri1 = new Triangle(p1, p2, p3); const isWater1 = this.isWater(p1.y);
const tri2 = new Triangle(p1, p3, p4); const color1 = isWater1 ? { isWater: true, r: 0, g: 0, b: 180 } : { r: 0, g: 180, b: 0 };
const isWater2 = this.isWater(p2.y);
const color2 = isWater2 ? { isWater: true, r: 0, g: 0, b: 180 } : { r: 0, g: 180, b: 0 };
const isWater3 = this.isWater(p3.y);
const color3 = isWater3 ? { isWater: true, r: 0, g: 0, b: 180 } : { r: 0, g: 180, b: 0 };
const isWater4 = this.isWater(p4.y);
const color4 = isWater4 ? { isWater: true, r: 0, g: 0, b: 180 } : { r: 0, g: 180, b: 0 };
this.triangles.push(tri1); this.triangles.push(new TriangleMesh(p1, p2, p3));
this.triangles.push(tri2); this.triangles.push(new TriangleMesh(p1, p3, p4));
} }
} }
this.triangles.forEach(t => t.calculateNormal());
} }
getPoint(x, z) { getPoint(x, z) {
const worldX = x * this.gridSize + this.offsetX; const worldX = x * this.gridSize + this.offsetX;
const worldZ = z * this.gridSize + this.offsetZ; const worldZ = z * this.gridSize + this.offsetZ;
const y = this.generateHeight(worldX, worldZ); const y = this.generateHeight(worldX, worldZ);
const point = new Point3D(worldX, y, worldZ); return new Point3D(worldX, y, worldZ);
point.isWater = this.isWater(worldX, worldZ, y);
return point;
} }
draw() { render() {
this.triangles.forEach(tri => tri.drawFilled()); this.triangles.sort((a, b) => {
this.triangles.forEach(tri => tri.drawWireframe()); const za = (a.p1.z + a.p2.z + a.p3.z) / 3;
const zb = (b.p1.z + b.p2.z + b.p3.z) / 3;
return zb - za;
});
this.triangles.forEach(tri => tri.draw());
} }
} }
class Airplane { class Airplane {
constructor() { constructor() {
this.z = 120; this.vertices = [];
this.yaw = 0; this.faces = [];
this.roll = 0;
this.pitch = 0;
this.wireframe = [];
this.init(); this.init();
} }
init() { init() {
const w = 20, h = 8, d = 30; const verts = [];
const vertices = [ const faces = [];
{ x: 0, y: -h, z: 0 },
{ x: w, y: 0, z: d / 2 },
{ x: -w, y: 0, z: d / 2 },
{ x: 0, y: 0, z: -d / 2 },
{ x: w, y: 0, z: -d / 4 },
{ x: -w, y: 0, z: -d / 4 },
{ x: 0, y: h, z: 0 }
];
const edges = [ const fuselageLength = 80;
[0, 1], [0, 2], [0, 6], const fuselageRadius = 8;
[1, 2], const segments = 12;
[1, 4], [2, 5],
[3, 4], [3, 5],
[4, 5],
[6, 1], [6, 2], [6, 3]
];
this.wireframe = { vertices, edges }; for (let i = 0; i < segments; i++) {
const angle = (i / segments) * Math.PI * 2;
verts.push(new Point3D(
Math.cos(angle) * fuselageRadius,
Math.sin(angle) * fuselageRadius,
0
));
}
for (let i = 0; i < segments; i++) {
const angle1 = (i / segments) * Math.PI * 2;
const angle2 = ((i + 1) / segments) * Math.PI * 2;
verts.push(new Point3D(
Math.cos(angle1) * fuselageRadius,
Math.sin(angle1) * fuselageRadius,
fuselageLength
));
verts.push(new Point3D(
Math.cos(angle2) * fuselageRadius,
Math.sin(angle2) * fuselageRadius,
fuselageLength
));
}
verts.push(new Point3D(0, 0, fuselageLength + 30));
const baseIdx = 0;
const middleStart = segments;
const middleBase = middleStart;
const tipIdx = verts.length - 1;
for (let i = 0; i < segments; i++) {
const next = (i + 1) % segments;
const middleStart = segments + i * 2;
const middleNext = segments + ((i + 1) % segments) * 2;
faces.push([baseIdx + i, baseIdx + next, tipIdx]);
faces.push([middleStart, middleNext, middleStart + 1]);
faces.push([middleStart + 1, middleNext, middleNext + 1]);
}
const wingSpan = 100;
const wingChord = 25;
const wingY = -2;
const wingBackLeft = verts.length;
verts.push(new Point3D(-wingSpan / 2, wingY, 10));
verts.push(new Point3D(-wingSpan / 2 + 5, wingY, 35));
verts.push(new Point3D(wingSpan / 2 - 5, wingY, 35));
verts.push(new Point3D(wingSpan / 2, wingY, 10));
faces.push([wingBackLeft, wingBackLeft + 1, wingBackLeft + 2]);
faces.push([wingBackLeft, wingBackLeft + 2, wingBackLeft + 3]);
const tailSpan = 40;
const tailChord = 15;
const tailY = 12;
const tailBottom = verts.length;
verts.push(new Point3D(-tailSpan / 2, tailY, fuselageLength - 30));
verts.push(new Point3D(-tailSpan / 2 + 3, tailY, fuselageLength - 5));
verts.push(new Point3D(tailSpan / 2 - 3, tailY, fuselageLength - 5));
verts.push(new Point3D(tailSpan / 2, tailY, fuselageLength - 30));
faces.push([tailBottom, tailBottom + 1, tailBottom + 2]);
faces.push([tailBottom, tailBottom + 2, tailBottom + 3]);
const vertFinTop = verts.length;
verts.push(new Point3D(0, tailY + 25, fuselageLength - 25));
verts.push(new Point3D(0, tailY + 25, fuselageLength - 5));
faces.push([vertFinTop, vertFinTop + 1, middleStart]);
this.vertices = verts;
this.faces = faces;
} }
update() { update() {
this.yaw = Math.sin(Date.now() / 1000) * 0.15; this.yaw = Math.sin(Date.now() / 1000) * 0.15;
this.roll = Math.sin(Date.now() / 600) * 0.3; this.roll = Math.sin(Date.now() / 600) * 0.2;
this.pitch = Math.cos(Date.now() / 800) * 0.2; this.pitch = Math.cos(Date.now() / 800) * 0.15;
} }
draw() { render() {
const transformedVerts = this.vertices.map(v => {
const rot = rotateY(v, this.yaw);
const cosR = Math.cos(this.roll), sinR = Math.sin(this.roll);
const x1 = rot.x * cosR - rot.y * sinR;
const y1 = rot.x * sinR + rot.y * cosR;
const cosP = Math.cos(this.pitch), sinP = Math.sin(this.pitch);
const y2 = y1 * cosP - rot.z * sinP;
const z2 = y1 * sinP + rot.z * cosP;
return new Point3D(x1, y2, 150 + z2);
});
ctx.strokeStyle = '#ff0000'; ctx.strokeStyle = '#ff0000';
ctx.lineWidth = 2.5; ctx.lineWidth = 2;
ctx.shadowBlur = 15; ctx.shadowBlur = 15;
ctx.shadowColor = '#ff0000'; ctx.shadowColor = '#ff0000';
const rotated = this.wireframe.vertices.map(v => { this.faces.forEach((face) => {
let x = v.x, y = v.y, z = v.z; const p1 = transformedVerts[face[0]];
const p2 = transformedVerts[face[1]];
const p3 = transformedVerts[face[2]];
const cosY = Math.cos(this.yaw), sinY = Math.sin(this.yaw); ctx.beginPath();
const x1 = x * cosY - z * sinY; ctx.moveTo(p1.project().x, p1.project().y);
const z1 = x * sinY + z * cosY; ctx.lineTo(p2.project().x, p2.project().y);
ctx.lineTo(p3.project().x, p3.project().y);
const cosR = Math.cos(this.roll), sinR = Math.sin(this.roll); ctx.closePath();
const x2 = x1 * cosR - y * sinR; ctx.stroke();
const y1 = x1 * sinR + y * cosR;
const cosP = Math.cos(this.pitch), sinP = Math.sin(this.pitch);
const y2 = y1 * cosP - z1 * sinP;
const z2 = y1 * sinP + z1 * cosP;
return new Point3D(x2, y2, this.z + z2);
}); });
ctx.beginPath();
this.wireframe.edges.forEach(([a, b]) => {
const p1 = rotated[a].project();
const p2 = rotated[b].project();
ctx.moveTo(p1.x, p1.y);
ctx.lineTo(p2.x, p2.y);
});
ctx.stroke();
ctx.shadowBlur = 0; ctx.shadowBlur = 0;
} }
} }
@@ -299,10 +347,10 @@
ctx.fillRect(0, 0, width, height); ctx.fillRect(0, 0, width, height);
landscape.update(); landscape.update();
landscape.draw(); landscape.render();
airplane.update(); airplane.update();
airplane.draw(); airplane.render();
requestAnimationFrame(animate); requestAnimationFrame(animate);
} }