462 lines
14 KiB
JavaScript
462 lines
14 KiB
JavaScript
import { loadTexture, makeProgram } from "./gl";
|
|
import { blockLookup, BlockType, generateMissingChunks, makeWorld, updateWorldGeometry } from './world';
|
|
import * as se3 from './se3';
|
|
|
|
const TEST_VSHADER = `
|
|
attribute vec3 aPosition;
|
|
attribute vec3 aNormal;
|
|
attribute vec2 aTextureCoord;
|
|
|
|
uniform mat4 uProjection;
|
|
uniform mat4 uModel;
|
|
uniform mat4 uView;
|
|
uniform vec3 uLightDirection;
|
|
uniform float uAmbiantLight;
|
|
|
|
varying highp vec2 vTextureCoord;
|
|
varying lowp vec3 vLighting;
|
|
varying lowp float vDistance;
|
|
|
|
void main() {
|
|
highp mat4 modelview = uView * uModel;
|
|
|
|
gl_Position = uProjection * modelview * vec4(aPosition, 1.0);
|
|
|
|
lowp vec3 normal = mat3(uModel) * aNormal;
|
|
lowp float diffuseAmount = max(dot(-uLightDirection, normal), 0.0);
|
|
lowp vec3 ambiant = uAmbiantLight * vec3(1.0, 1.0, 0.9);
|
|
vLighting = ambiant + vec3(1.0, 1.0, 1.0) * diffuseAmount;
|
|
|
|
vTextureCoord = aTextureCoord;
|
|
|
|
vDistance = length(modelview * vec4(aPosition, 1.0));
|
|
}
|
|
`;
|
|
|
|
const TEST_FSHADER = `
|
|
uniform sampler2D uSampler;
|
|
uniform lowp vec3 uFogColor;
|
|
|
|
varying highp vec2 vTextureCoord;
|
|
varying lowp vec3 vLighting;
|
|
varying lowp float vDistance;
|
|
|
|
void main() {
|
|
highp vec4 color = texture2D(uSampler, vTextureCoord);
|
|
lowp float fogamount = smoothstep(30.0, 90.0, vDistance);
|
|
gl_FragColor = vec4(mix(vLighting * color.rgb, uFogColor, fogamount), color.a);
|
|
}
|
|
`;
|
|
|
|
/** Draw.
|
|
*
|
|
* @param {WebGLRenderingContext} gl
|
|
*/
|
|
function draw(gl, params, objects) {
|
|
const skyColor = [0.6, 0.8, 1.0];
|
|
|
|
gl.clearColor(...skyColor, 1.0);
|
|
gl.clearDepth(1.0);
|
|
gl.enable(gl.DEPTH_TEST);
|
|
gl.depthFunc(gl.LEQUAL);
|
|
|
|
gl.enable(gl.CULL_FACE);
|
|
gl.cullFace(gl.BACK);
|
|
|
|
gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
|
|
|
|
const camrot = params.camera.orientation;
|
|
const campos = params.camera.position;
|
|
const viewMatrix = se3.product(
|
|
se3.rotxyz(-camrot[0], -camrot[1], -camrot[2]),
|
|
se3.translation(-campos[0], -campos[1], -campos[2])
|
|
);
|
|
|
|
let lastGlContext;
|
|
|
|
for (const {glContext, position, orientation, geometry} of objects) {
|
|
if (glContext !== lastGlContext) {
|
|
glContext.setupScene({
|
|
projectionMatrix: params.projMatrix,
|
|
viewMatrix,
|
|
fogColor: skyColor,
|
|
lightDirection: params.lightDirection,
|
|
ambiantLightAmount: params.ambiantLight,
|
|
});
|
|
}
|
|
|
|
lastGlContext = glContext;
|
|
|
|
glContext.drawObject({
|
|
position,
|
|
orientation,
|
|
glBuffer: geometry.glBuffer,
|
|
numVertices: geometry.numVertices,
|
|
});
|
|
}
|
|
}
|
|
|
|
const stuff = {
|
|
lastFrameTime: 0,
|
|
};
|
|
|
|
function handleKeys(params) {
|
|
const move = (forward, right) => {
|
|
const dir = [right, 0, -forward, 1.0];
|
|
const ori = se3.roty(params.camera.orientation[1]);
|
|
const tf = se3.apply(ori, dir);
|
|
|
|
if (params.flying) {
|
|
params.camera.position[0] += tf[0];
|
|
params.camera.position[2] += tf[2];
|
|
}
|
|
if (params.isOnGround) {
|
|
params.camera.velocity[0] = tf[0];
|
|
params.camera.velocity[2] = tf[2];
|
|
} else {
|
|
params.camera.velocity[0] += tf[0] / 60;
|
|
params.camera.velocity[2] += tf[2] / 60;
|
|
|
|
if (Math.abs(params.camera.velocity[0]) > Math.abs(tf[0])) {
|
|
params.camera.velocity[0] = tf[0];
|
|
}
|
|
if (Math.abs(params.camera.velocity[2]) > Math.abs(tf[2])) {
|
|
params.camera.velocity[2] = tf[2];
|
|
}
|
|
}
|
|
};
|
|
|
|
params.keys.forEach(key => {
|
|
switch (key) {
|
|
case 'KeyW':
|
|
move(0.1, 0.0);
|
|
return;
|
|
case 'KeyA':
|
|
move(0.0, -0.1);
|
|
return;
|
|
case 'KeyS':
|
|
move(-0.1, 0.0);
|
|
return;
|
|
case 'KeyD':
|
|
move(0.0, 0.1);
|
|
return;
|
|
|
|
case 'Space':
|
|
if(params.flying) {
|
|
params.camera.position[1] += 0.1;
|
|
} else {
|
|
if (params.jumpAmount > 0) {
|
|
const amount = 0.4 * params.jumpAmount;
|
|
params.camera.velocity[1] += amount / 60;
|
|
params.jumpAmount -= amount;
|
|
}
|
|
}
|
|
return;
|
|
case 'ControlLeft':
|
|
params.camera.position[1] -= 0.1;
|
|
return;
|
|
}
|
|
});
|
|
}
|
|
|
|
function getObjects(world, z, x, glContext) {
|
|
return world.chunks
|
|
.filter(chunk => {
|
|
if (chunk.position.z < z - 8 * 16) return false;
|
|
if (chunk.position.z > z + 7 * 16) return false;
|
|
if (chunk.position.x < x - 8 * 16) return false;
|
|
if (chunk.position.x > x + 7 * 16) return false;
|
|
|
|
if (chunk.buffer === undefined) {
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
})
|
|
.map(chunk => ({
|
|
position: [0.0, 0.0, 0.0],
|
|
orientation: [0.0, 0.0, 0.0],
|
|
geometry: chunk.buffer,
|
|
glContext,
|
|
}));
|
|
}
|
|
|
|
function updatePhysics(params) {
|
|
params.camera.velocity[1] -= 9.8 / 60 / 60;
|
|
|
|
const oldPos = params.camera.position;
|
|
const targetPos = params.flying ? oldPos : params.camera.position.map((v, i) => v + params.camera.velocity[i]);
|
|
const {isOnGround, newPos} = checkCollision(oldPos, targetPos, params.world);
|
|
params.camera.position = newPos;
|
|
params.camera.velocity = newPos.map((v, i) => v - oldPos[i]);
|
|
if (isOnGround) {
|
|
params.jumpAmount = 6;
|
|
params.camera.velocity = params.camera.velocity.map(v => v * 0.7);
|
|
}
|
|
params.isOnGround = isOnGround;
|
|
}
|
|
|
|
function tick(time, gl, params) {
|
|
handleKeys(params);
|
|
updatePhysics(params);
|
|
|
|
const campos = params.camera.position;
|
|
|
|
// expensive stuff, can take several cycles
|
|
try {
|
|
let timeLeft = 10;
|
|
const start = performance.now();
|
|
generateMissingChunks(params.world, campos[2], campos[0], timeLeft);
|
|
|
|
timeLeft -= performance.now() - start;
|
|
updateWorldGeometry(gl, params.world, campos[2], campos[0], timeLeft);
|
|
}
|
|
catch (ex) {
|
|
if (ex !== 'timesup') {
|
|
throw ex;
|
|
}
|
|
}
|
|
|
|
const objects = getObjects(params.world, campos[2], campos[0], params.worldGl);
|
|
draw(gl, params, objects);
|
|
|
|
const dt = (time - stuff.lastFrameTime) * 0.001;
|
|
stuff.lastFrameTime = time;
|
|
|
|
document.querySelector('#fps').textContent = `${1.0 / dt} fps`;
|
|
document.querySelector('#lightDirVec').textContent = JSON.stringify(params.lightDirection);
|
|
|
|
requestAnimationFrame(time => tick(time, gl, params));
|
|
}
|
|
|
|
function checkCollision(curPos, newPos, world) {
|
|
// I guess Steve is about 1.7 m tall?
|
|
// he also has a 60x60 cm axis-aligned square section '^_^
|
|
// box is centered around the camera
|
|
const steveBB = [
|
|
[-0.3, 0.2, -0.3],
|
|
[-0.3, 0.2, 0.3],
|
|
[0.3, 0.2, -0.3],
|
|
[0.3, 0.2, 0.3],
|
|
|
|
[-0.3, -1.5, -0.3],
|
|
[-0.3, -1.5, 0.3],
|
|
[0.3, -1.5, -0.3],
|
|
[0.3, -1.5, 0.3],
|
|
];
|
|
|
|
const translate = (v, pos) => v.map((el, i) => el + pos[i]);
|
|
|
|
let dp = newPos.map((x, i) => x - curPos[i]);
|
|
let isOnGround = false;
|
|
|
|
for (let i = 0; i < 3; i++) {
|
|
const newSteve = v => v.map((x, j) => i === j ? x + newPos[j] : x + curPos[j]);
|
|
for (const point of steveBB.map(newSteve)) {
|
|
const block = blockLookup(world, ...point);
|
|
if (block.type !== BlockType.AIR) {
|
|
if (i === 1 && dp[i] < 0) {
|
|
isOnGround = true;
|
|
}
|
|
dp[i] = 0;
|
|
}
|
|
}
|
|
}
|
|
for (let i = 0; i < 3; i++) {
|
|
const newSteve = v => v.map((x, j) => curPos[j] + x + dp[j]);
|
|
for (const point of steveBB.map(newSteve)) {
|
|
const block = blockLookup(world, ...point);
|
|
if (block.type !== BlockType.AIR) {
|
|
dp[i] = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
return {
|
|
newPos: translate(curPos, dp),
|
|
isOnGround,
|
|
};
|
|
}
|
|
|
|
// Mine & place
|
|
// ------------
|
|
// [ ] ray casting
|
|
// [ ] block outline
|
|
// [ ] crosshair
|
|
// [ ] dynamic terrain re-rendering
|
|
// [ ] should use a linked list of air contact blocks
|
|
|
|
// Stuff I need to do:
|
|
// [x] a skybox
|
|
// [x] a movable camera
|
|
// [x] some kind of gravity
|
|
// [x] collision detection
|
|
// [x] more blocks
|
|
// [ ] ability to mine & place
|
|
// [x] generating & loading of more chunks
|
|
// [x] distance fog
|
|
// [ ] different biomes (with different noise stats)
|
|
// [ ] non-flowy water
|
|
// [ ] flowy water
|
|
// [ ] ALIGN CHUNK WITH WORLD COORDS
|
|
// [x] better controls
|
|
// [ ] save the world (yay) to local storage (bah)
|
|
|
|
async function initWorldGl(gl) {
|
|
const program = makeProgram(gl, TEST_VSHADER, TEST_FSHADER);
|
|
const texture = await loadTexture(gl, 'texture.png');
|
|
|
|
// load those ahead of time
|
|
const viewLoc = gl.getUniformLocation(program, 'uView');
|
|
const modelLoc = gl.getUniformLocation(program, 'uModel');
|
|
const projLoc = gl.getUniformLocation(program, 'uProjection');
|
|
const samplerLoc = gl.getUniformLocation(program, 'uSampler');
|
|
const fogColorLoc = gl.getUniformLocation(program, 'uFogColor');
|
|
const lightDirectionLoc = gl.getUniformLocation(program, 'uLightDirection');
|
|
const ambiantLoc = gl.getUniformLocation(program, 'uAmbiantLight');
|
|
|
|
const positionLoc = gl.getAttribLocation(program, 'aPosition');
|
|
const normalLoc = gl.getAttribLocation(program, 'aNormal');
|
|
const textureLoc = gl.getAttribLocation(program, 'aTextureCoord');
|
|
|
|
const setupScene = (sceneParams) => {
|
|
const {
|
|
projectionMatrix,
|
|
viewMatrix,
|
|
fogColor,
|
|
lightDirection,
|
|
ambiantLightAmount,
|
|
} = sceneParams;
|
|
|
|
gl.useProgram(program);
|
|
|
|
gl.uniformMatrix4fv(projLoc, false, new Float32Array(projectionMatrix));
|
|
gl.uniformMatrix4fv(viewLoc, false, new Float32Array(viewMatrix));
|
|
gl.uniform3fv(fogColorLoc, fogColor);
|
|
gl.uniform3fv(lightDirectionLoc, lightDirection);
|
|
gl.uniform1f(ambiantLoc, ambiantLightAmount);
|
|
|
|
// doing this here because it's the same for all world stuff
|
|
gl.uniformMatrix4fv(modelLoc, false, new Float32Array(se3.identity()));
|
|
gl.uniform1i(samplerLoc, 0);
|
|
|
|
gl.enableVertexAttribArray(positionLoc);
|
|
gl.enableVertexAttribArray(normalLoc);
|
|
gl.enableVertexAttribArray(textureLoc);
|
|
gl.activeTexture(gl.TEXTURE0);
|
|
gl.bindTexture(gl.TEXTURE_2D, texture);
|
|
};
|
|
|
|
const drawObject = (objectParams) => {
|
|
const {
|
|
glBuffer,
|
|
numVertices,
|
|
} = objectParams;
|
|
|
|
gl.bindBuffer(gl.ARRAY_BUFFER, glBuffer);
|
|
|
|
gl.vertexAttribPointer(positionLoc, 3, gl.FLOAT, false, 20, 0);
|
|
gl.vertexAttribPointer(normalLoc, 3, gl.BYTE, true, 20, 12);
|
|
gl.vertexAttribPointer(textureLoc, 2, gl.UNSIGNED_SHORT, true, 20, 16);
|
|
|
|
gl.drawArrays(gl.TRIANGLES, 0, numVertices);
|
|
};
|
|
|
|
return {
|
|
setupScene,
|
|
drawObject,
|
|
};
|
|
}
|
|
|
|
async function main() {
|
|
const canvas = document.querySelector('#game');
|
|
const gl = canvas.getContext('webgl');
|
|
|
|
if (gl === null) {
|
|
console.error('webgl not available')
|
|
return;
|
|
}
|
|
|
|
const params = {
|
|
projMatrix: se3.perspective(Math.PI / 3, canvas.clientWidth / canvas.clientHeight, 0.1, 100.0),
|
|
camera: {
|
|
position: [0.0, 70.5, 0.0],
|
|
orientation: [0.0, Math.PI, 0.0],
|
|
velocity: [0, 0, 0],
|
|
},
|
|
keys: new Set(),
|
|
lightDirection: [-0.2, -0.5, 0.4],
|
|
ambiantLight: 0.7,
|
|
flying: false,
|
|
isOnGround: false,
|
|
world: makeWorld(),
|
|
worldGl: await initWorldGl(gl),
|
|
}
|
|
|
|
document.querySelector('#lightx').oninput = e => {
|
|
params.lightDirection[0] = e.target.value / 100;
|
|
};
|
|
document.querySelector('#lighty').oninput = e => {
|
|
params.lightDirection[1] = e.target.value / 100;
|
|
};
|
|
document.querySelector('#lightz').oninput = e => {
|
|
params.lightDirection[2] = e.target.value / 100;
|
|
};
|
|
document.querySelector('#ambiant').oninput = e => {
|
|
params.ambiantLight = e.target.value / 100;
|
|
};
|
|
|
|
const collapsibles = document.getElementsByClassName("collapsible");
|
|
for (const collapsible of collapsibles) {
|
|
collapsible.onclick = e => {
|
|
const content = collapsible.nextElementSibling;
|
|
if (content.style.height === 'fit-content') {
|
|
content.style.height = '0px';
|
|
} else {
|
|
content.style.height = 'fit-content';
|
|
}
|
|
};
|
|
}
|
|
|
|
canvas.onclick = e => {
|
|
canvas.requestPointerLock();
|
|
const keyListener = e => {
|
|
if (e.type === 'keydown') {
|
|
params.keys.add(e.code);
|
|
|
|
switch (e.code) {
|
|
case 'KeyF':
|
|
params.flying = !params.flying;
|
|
console.log(`flying: ${params.flying}`)
|
|
}
|
|
} else {
|
|
params.keys.delete(e.code);
|
|
}
|
|
};
|
|
const moveListener = e => {
|
|
params.camera.orientation[1] -= e.movementX / 500;
|
|
params.camera.orientation[0] -= e.movementY / 500;
|
|
|
|
params.camera.orientation[0] = Math.min(Math.max(
|
|
params.camera.orientation[0], -Math.PI / 2
|
|
), Math.PI / 2);
|
|
};
|
|
const changeListener = () => {
|
|
if (document.pointerLockElement === canvas) {
|
|
return;
|
|
}
|
|
document.removeEventListener('pointerlockchange', changeListener);
|
|
document.removeEventListener('pointermove', moveListener);
|
|
document.removeEventListener('keydown', keyListener);
|
|
document.removeEventListener('keyup', keyListener);
|
|
};
|
|
document.addEventListener('pointerlockchange', changeListener);
|
|
document.addEventListener('pointermove', moveListener);
|
|
document.addEventListener('keydown', keyListener);
|
|
document.addEventListener('keyup', keyListener);
|
|
};
|
|
requestAnimationFrame(time => tick(time, gl, params));
|
|
}
|
|
|
|
window.onload = main;
|