801 lines
25 KiB
JavaScript
801 lines
25 KiB
JavaScript
import { makeBufferFromFaces, makeFace } from "./geometry";
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import { loadTexture, makeProgram } from "./gl";
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import * as se3 from './se3';
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import { checkCave, makeTerrain, random } from "./terrain";
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const VSHADER = `
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attribute vec3 aPosition;
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attribute vec3 aNormal;
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attribute vec2 aTextureCoord;
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uniform mat4 uProjection;
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uniform mat4 uModel;
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uniform mat4 uView;
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uniform vec3 uLightDirection;
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uniform float uAmbiantLight;
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varying highp vec2 vTextureCoord;
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varying lowp vec3 vLighting;
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varying lowp float vDistance;
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void main() {
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highp mat4 modelview = uView * uModel;
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gl_Position = uProjection * modelview * vec4(aPosition, 1.0);
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lowp vec3 normal = mat3(uModel) * aNormal;
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lowp float diffuseAmount = max(dot(-uLightDirection, normal), 0.0);
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lowp vec3 ambiant = uAmbiantLight * vec3(1.0, 1.0, 0.9);
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vLighting = ambiant + vec3(1.0, 1.0, 1.0) * diffuseAmount;
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vTextureCoord = aTextureCoord;
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vDistance = length(modelview * vec4(aPosition, 1.0));
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}
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`;
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const FSHADER = `
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uniform sampler2D uSampler;
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uniform lowp vec3 uFogColor;
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varying highp vec2 vTextureCoord;
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varying lowp vec3 vLighting;
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varying lowp float vDistance;
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void main() {
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highp vec4 color = texture2D(uSampler, vTextureCoord);
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if (color.a < 0.1) {
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discard;
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}
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lowp float fogamount = smoothstep(80.0, 100.0, vDistance);
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gl_FragColor = mix(vec4(vLighting * color.rgb, color.a), vec4(uFogColor, 1.0), fogamount);
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}
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`;
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export const BlockType = {
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UNDEFINED: 0,
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AIR: 1,
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DIRT: 2,
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GRASS: 3,
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STONE: 4,
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WATER: 5,
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TREE: 6,
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LEAVES: 7,
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};
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function hasATree(seed, z, x) {
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const rand = random(seed, z, x);
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return (rand % 333 === 123);
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}
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function makeATree(data, pos, seed, chunkz, chunkx) {
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const height = 3 + random(seed, chunkz + pos[0], chunkx + pos[1]) % 6;
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const offset = 256 * (16 * pos[0] + pos[1]);
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const firstBlock = pos[2];
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for (let i = 0; i < height; i++) {
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data[offset + firstBlock + i] = BlockType.TREE;
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}
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function setBlock(i, j, k, type) {
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if (i < 0 || j < 0 || k < 0 || i > 15 || j > 15 || k > 255) return;
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const offset = 256 * (16 * i + j) + k;
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if (data[offset] !== BlockType.AIR) return;
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data[offset] = type;
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}
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for (let i = pos[0] - 2; i < pos[0] + 3; i++) {
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for (let j = pos[1] - 2; j < pos[1] + 3; j++) {
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for (let k = firstBlock + height - 2; k < firstBlock + height + 2; k++) {
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setBlock(i, j, k, BlockType.LEAVES);
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}
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}
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}
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return firstBlock + height;
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}
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function makeChunk(z, x) {
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const seed = 1337;
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const terrain = makeTerrain(seed, z, x);
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const data = new Uint8Array(16 * 16 * 256);
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const trees = [];
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for (let i = 0; i < 16; i++) {
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for (let j = 0; j < 16; j++) {
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const height = terrain[i * 16 + j];
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const offset = i * (16 * 256) + j * 256;
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const stoneHeight = Math.max(48, height);
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const grassHeight = stoneHeight + 8;
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const waterHeight = 67;
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let currentHeight = 0;
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data.set(Array(stoneHeight).fill(BlockType.STONE), offset);
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currentHeight = stoneHeight;
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data.set(Array(grassHeight - currentHeight).fill(BlockType.DIRT), offset + currentHeight);
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currentHeight = grassHeight;
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if (grassHeight < waterHeight) {
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data.set(Array(waterHeight - currentHeight).fill(BlockType.WATER), offset + currentHeight);
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currentHeight = waterHeight;
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} else {
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if (hasATree(seed, z + i, x + j)) {
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trees.push([i, j, currentHeight]);
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} else {
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data[offset + grassHeight - 1] = BlockType.GRASS;
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}
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}
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data.set(Array(256 - currentHeight).fill(BlockType.AIR), offset + currentHeight);
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}
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}
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for (const tree of trees) {
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makeATree(data, tree, seed, z, x);
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}
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// caves
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// [ ] 3d perlin noise up to 64
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// [ ] sample 4x4x4 to check for caves
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// [ ] fill with air where appropriate
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function propagateCave(i, j, k) {
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const neighbors = (i, j, k) => [
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[i - 1, j, k],
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[i + 1, j, k],
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[i, j - 1, k],
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[i, j + 1, k],
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[i, j, k - 1],
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[i, j, k + 1],
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];
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const queue = neighbors(i, j, k);
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while (queue.length > 0) {
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const [ni, nj, nk] = queue.pop();
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if (ni < 0 || ni > 15 || nj < 0 || nj > 15 || nk < 0 || nk > 255) {
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continue;
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}
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const bi = 256 * (16 * ni + nj) + nk;
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if (data[bi] === BlockType.AIR || data[bi] === BlockType.WATER) {
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continue;
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}
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if (checkCave(seed, x + nj, nk, z + ni)) {
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data[bi] = BlockType.AIR;
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queue.push(...neighbors(ni, nj, nk));
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}
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}
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}
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for (let i = 0; i < 16; i += 4) {
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for (let j = 0; j < 16; j += 4) {
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let bi = 256 * (16 * i + j);
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for (let k = 0; k < 58; k += 4, bi += 4) {
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if (data[bi] === BlockType.AIR) {
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continue;
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}
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if (checkCave(seed, x + j, k, z + i)) {
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data[bi] = BlockType.AIR;
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propagateCave(i, j, k);
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}
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}
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}
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}
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return {
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position: {z, x},
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data,
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};
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}
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export function blockLookup(world, x, y, z) {
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if (y < 0.5 || y > 255.5) {
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return {
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type: BlockType.UNDEFINED,
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}
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}
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const midx = x + 0.5;
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const midy = y + 0.5;
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const midz = z + 0.5;
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const chunki = Math.floor(midz / 16);
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const chunkj = Math.floor(midx / 16);
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const chunk = world.chunkMap.get(chunki, chunkj);
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if (chunk === undefined) {
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return {
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type: BlockType.UNDEFINED,
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};
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}
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const i = Math.floor(midz - chunki * 16);
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const j = Math.floor(midx - chunkj * 16);
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const k = Math.floor(midy);
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const blockIndex = 256 * (16*i + j) + k;
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return {
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type: chunk.data[blockIndex],
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centerPosition: [
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Math.floor(midx),
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k,
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Math.floor(midz),
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],
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chunk,
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blockIndex,
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};
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}
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function faceTexture(type, dir) {
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switch (type) {
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case BlockType.GRASS:
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switch (dir) {
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case '+y': return [0, 15];
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case '-y': return [2, 15];
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default: return [1, 15];
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}
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case BlockType.DIRT: return [2, 15];
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case BlockType.STONE: return [3, 15];
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case BlockType.WATER: return [4, 15];
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case BlockType.TREE:
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switch (dir) {
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case '+y':
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case '-y':
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return [5, 15];
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default: return [6, 15];
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}
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case BlockType.LEAVES: return [7, 15];
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default: return [0, 0];
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}
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}
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function faceCenter(blockCenter, dir) {
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const [x, y, z] = blockCenter;
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switch (dir) {
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case '+x': return [x + 0.5, y, z];
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case '-x': return [x - 0.5, y, z];
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case '+y': return [x, y + 0.5, z];
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case '-y': return [x, y - 0.5, z];
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case '+z': return [x, y, z + 0.5];
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case '-z': return [x, y, z - 0.5];
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}
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}
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function isTransparent(type) {
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switch (type) {
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case BlockType.WATER:
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case BlockType.LEAVES:
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case BlockType.AIR:
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return true;
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default: return false;
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}
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}
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function makeFaceList(chunk, lookup) {
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const chunkz = chunk.position.z;
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const chunkx = chunk.position.x;
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const neighbors = (i, j, k) => [
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{ block: lookup(i - 1, j, k), dir: '-z', faceCenter: [chunkx + j, k, chunkz + i - 0.5] },
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{ block: lookup(i + 1, j, k), dir: '+z', faceCenter: [chunkx + j, k, chunkz + i + 0.5] },
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{ block: lookup(i, j - 1, k), dir: '-x', faceCenter: [chunkx + j - 0.5, k, chunkz + i] },
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{ block: lookup(i, j + 1, k), dir: '+x', faceCenter: [chunkx + j + 0.5, k, chunkz + i] },
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{ block: lookup(i, j, k - 1), dir: '-y', faceCenter: [chunkx + j, k - 0.5, chunkz + i] },
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{ block: lookup(i, j, k + 1), dir: '+y', faceCenter: [chunkx + j, k + 0.5, chunkz + i] },
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];
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function* blocks() {
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for (let i = 0; i < 16; i++) {
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for (let j = 0; j < 16; j++) {
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for (let k = 0; k < 256; k++) {
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yield [i, j, k];
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}
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}
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}
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}
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chunk.faces = [];
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chunk.transparentFaces = [];
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return makeFaces(chunk, blocks, neighbors);
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}
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// - data <-- need to generate the first time, update when m&p
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// - faces <-- need to generate once when chunk enters view
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// - buffers <-- need to generate every time geometry changes?
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// --> could also render chunks 1 by 1
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const undefinedChunk = {data: new Proxy({}, {
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get: () => BlockType.UNDEFINED,
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})};
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class ChunkMap {
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map = {};
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key(i, j) {
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// meh, this limits us to 65536 chunks in the x direction :/
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return (i << 16) + j;
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}
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get(i, j) {
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const out = this.map[this.key(i, j)];
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return out ?? undefinedChunk;
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}
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set(i, j, x) {
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this.map[this.key(i, j)] = x;
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}
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has(i, j) {
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return this.key(i, j) in this.map;
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}
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}
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/** Makes a brave new (empty) world */
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export function makeWorld() {
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return {chunkMap: new ChunkMap()};
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}
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function makeFaces(chunk, blocks, neighbors) {
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if (chunk === undefined || chunk.faces === undefined) {
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return;
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}
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let geometryChanged = false;
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for (const [i, j, k] of blocks()) {
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const bi = 256 * (16 * i + j) + k;
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if (chunk.data[bi] === BlockType.AIR) {
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continue;
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}
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if (isTransparent(chunk.data[bi])) {
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for (const { dir, faceCenter } of neighbors(i, j, k)
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.filter(({ block }) => isTransparent(block) && block !== BlockType.WATER)
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) {
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if (chunk.data[bi] === BlockType.WATER) {
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faceCenter[1] -= 0.15; // TODO: lower face should be normal
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}
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chunk.transparentFaces.push({
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dir,
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face: makeFace(dir, faceTexture(chunk.data[bi], dir), faceCenter),
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blockIndex: bi,
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});
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geometryChanged = true;
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}
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} else {
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for (const { dir, faceCenter } of neighbors(i, j, k)
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.filter(({ block }) => isTransparent(block))
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) {
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chunk.faces.push({
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dir,
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face: makeFace(dir, faceTexture(chunk.data[bi], dir), faceCenter),
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blockIndex: bi,
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});
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geometryChanged = true;
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}
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}
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}
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if (geometryChanged && chunk.buffer !== undefined) {
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chunk.buffer.delete();
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delete chunk.buffer;
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chunk.transparentBuffer.delete();
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delete chunk.transparentBuffer;
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}
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}
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function updateMissingFaces(world, chunk) {
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const chunkz = chunk.position.z;
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const chunkx = chunk.position.x;
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const chunki = Math.floor(chunkz / 16);
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const chunkj = Math.floor(chunkx / 16);
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makeFaces(world.chunkMap.get(chunki - 1, chunkj),
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function* () {
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for (let j = 0; j < 16; j++) {
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for (let k = 0; k < 256; k++) {
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yield [15, j, k];
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}
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}
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}, (i, j, k) => [{
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block: chunk.data[256 * (16 * 0 + j) + k],
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dir: '+z',
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faceCenter: [chunkx + j, k, chunkz - 0.5],
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}]);
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makeFaces(world.chunkMap.get(chunki + 1, chunkj),
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function* () {
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for (let j = 0; j < 16; j++) {
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for (let k = 0; k < 256; k++) {
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yield [0, j, k];
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}
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}
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}, (i, j, k) => [{
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block: chunk.data[256 * (15 * 16 + j) + k],
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dir: '-z',
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faceCenter: [chunkx + j, k, chunkz + 16 - 0.5],
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}]);
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makeFaces(world.chunkMap.get(chunki, chunkj - 1),
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function* () {
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for (let i = 0; i < 16; i++) {
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for (let k = 0; k < 256; k++) {
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yield [i, 15, k];
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}
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}
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}, (i, j, k) => [{
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block: chunk.data[256 * (16 * i + 0) + k],
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dir: '+x',
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faceCenter: [chunkx - 0.5, k, chunkz + i],
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}]);
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makeFaces(world.chunkMap.get(chunki, chunkj + 1),
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function* () {
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for (let i = 0; i < 16; i++) {
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for (let k = 0; k < 256; k++) {
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yield [i, 0, k];
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}
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}
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}, (i, j, k) => [{
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block: chunk.data[256 * (16 * i + 15) + k],
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dir: '-x',
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faceCenter: [chunkx + 16 - 0.5, k, chunkz + i],
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}]);
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}
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/** Update the world, generating missing chunks if necessary. */
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export function generateMissingChunks(world, z, x, timeLimit = 10000) {
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const ic = Math.floor(z / 16);
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const jc = Math.floor(x / 16);
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const start = performance.now();
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for (let radius = 1; radius < 8; radius++) {
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for (let i = ic - radius; i < ic + radius; i++) {
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for (let j = jc - radius; j < jc + radius; j++) {
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if (world.chunkMap.has(i, j)) {
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continue;
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}
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if (radius > 2 && performance.now() - start > timeLimit) {
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return;
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}
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const chunk = makeChunk(i * 16, j * 16);
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world.chunkMap.set(i, j, chunk);
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updateMissingFaces(world, chunk);
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}
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}
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}
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return world;
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}
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/** Generates geometry for all visible chunks. */
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export function updateWorldGeometry(gl, world, z, x, timeLimit = 10000) {
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const ic = Math.floor(z / 16);
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const jc = Math.floor(x / 16);
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const start = performance.now();
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// k. Now, generate buffers for all chunks
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for (let radius = 1; radius < 8; radius++) {
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for (let i = ic - radius; i < ic + radius; i++) {
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for (let j = jc - radius; j < jc + radius; j++) {
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const chunk = world.chunkMap.get(i, j);
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if (chunk === undefined || chunk.buffer !== undefined) {
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continue;
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}
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if (radius > 2 && performance.now() - start > timeLimit) {
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return;
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}
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if(chunk.faces === undefined) {
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const neighborChunks = [
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world.chunkMap.get(i - 1, j),
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world.chunkMap.get(i + 1, j),
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world.chunkMap.get(i, j - 1),
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world.chunkMap.get(i, j + 1),
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];
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const lookup = (i, j, k) => {
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if (i < 0) { return neighborChunks[0].data[256 * (16 * (i + 16) + j) + k]; }
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if (i > 15) { return neighborChunks[1].data[256 * (16 * (i - 16) + j) + k]; }
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if (j < 0) { return neighborChunks[2].data[256 * (16 * i + j + 16) + k]; }
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if (j > 15) { return neighborChunks[3].data[256 * (16 * i + j - 16) + k]; }
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if (k < 0 || k > 255) { return BlockType.UNDEFINED; }
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return chunk.data[256*(16*i + j) + k];
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};
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makeFaceList(chunk, lookup);
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}
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chunk.buffer = makeBufferFromFaces(gl, chunk.faces.map(f => f.face));
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chunk.transparentBuffer = makeBufferFromFaces(gl, chunk.transparentFaces.map(f => f.face));
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}
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}
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|
|
|
}
|
|
}
|
|
|
|
export function checkCollision(curPos, newPos, world) {
|
|
// I guess Gontrand is about 1.7 m tall?
|
|
// he also has a 60x60 cm axis-aligned square section '^_^
|
|
// box is centered around the camera
|
|
const gontrandBB = [
|
|
[-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 gontrandBB.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 gontrandBB.map(newSteve)) {
|
|
const block = blockLookup(world, ...point);
|
|
if (block.type !== BlockType.AIR) {
|
|
dp[i] = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
return {
|
|
newPos: translate(curPos, dp),
|
|
isOnGround,
|
|
};
|
|
}
|
|
|
|
function minIndex(arr) {
|
|
return arr.reduce((min, val, i) => val >= arr[min] ? min : i, -1);
|
|
}
|
|
|
|
function movePoint(p, s, u) {
|
|
return [p[0] + s * u[0], p[1] + s * u[1], p[2] + s * u[2]];
|
|
}
|
|
|
|
function rayThroughGrid(origin, direction, maxDistance) {
|
|
const range = i => [...Array(i).keys()];
|
|
|
|
const nextGrid = range(3).map(i => direction[i] > 0 ?
|
|
Math.floor(origin[i] + 0.5) + 0.5 :
|
|
Math.floor(origin[i] + 0.499) - 0.5);
|
|
const distanceToGrid = range(3).map(i => (nextGrid[i] - origin[i]) / direction[i])
|
|
.map(v => v === 0.0 ? Number.POSITIVE_INFINITY : v);
|
|
const axis = minIndex(distanceToGrid);
|
|
const rayLength = distanceToGrid[axis];
|
|
|
|
if (rayLength > maxDistance) {
|
|
return {};
|
|
}
|
|
|
|
const position = movePoint(origin, distanceToGrid[axis], direction);
|
|
const normal = range(3).map(i => i === axis ? -Math.sign(direction[i]) : 0);
|
|
|
|
return {position, normal, distance: rayLength};
|
|
}
|
|
|
|
export function castRay(world, origin, direction, maxDistance) {
|
|
let currentPoint = origin;
|
|
|
|
while (maxDistance > 0) {
|
|
const {position, normal, distance} = rayThroughGrid(currentPoint, direction, maxDistance);
|
|
|
|
if (position === undefined) {
|
|
return;
|
|
}
|
|
|
|
maxDistance -= distance;
|
|
currentPoint = position;
|
|
const blockCenter = movePoint(position, -0.5, normal);
|
|
const block = blockLookup(world, ...blockCenter);
|
|
|
|
if (block.type === BlockType.AIR) {
|
|
continue;
|
|
}
|
|
|
|
return {
|
|
block,
|
|
normal,
|
|
};
|
|
}
|
|
}
|
|
|
|
export function markBlock(world, cameraPosition, direction, maxDistance) {
|
|
const hit = castRay(world, cameraPosition, direction, maxDistance);
|
|
|
|
if (hit === undefined || hit.block.type === BlockType.UNDEFINED) {
|
|
return;
|
|
}
|
|
|
|
const texture = [0, 14];
|
|
const {normal, block} = hit;
|
|
const faceCenter = movePoint(block.centerPosition, 0.51, normal);
|
|
|
|
if (normal[0] > 0) {
|
|
return makeFace('+x', texture, faceCenter);
|
|
} else if (normal[0] < 0) {
|
|
return makeFace('-x', texture, faceCenter);
|
|
} else if (normal[1] > 0) {
|
|
return makeFace('+y', texture, faceCenter);
|
|
} else if (normal[1] < 0) {
|
|
return makeFace('-y', texture, faceCenter);
|
|
} else if (normal[2] > 0) {
|
|
return makeFace('+z', texture, faceCenter);
|
|
} else if (normal[2] < 0) {
|
|
return makeFace('-z', texture, faceCenter);
|
|
}
|
|
}
|
|
|
|
function blockIndex2Ijk(bi) {
|
|
const blocki = Math.floor(bi / (256 * 16));
|
|
const blockj = Math.floor((bi % (256 * 16)) / 256);
|
|
const blockk = bi % 256;
|
|
|
|
return [blocki, blockj, blockk];
|
|
}
|
|
|
|
export function destroyBlock(world, block) {
|
|
const trimFaces = chunk => {
|
|
chunk.faces = chunk.faces.filter(({blockIndex}) => chunk.data[blockIndex] !== BlockType.AIR);
|
|
chunk.transparentFaces = chunk.transparentFaces.filter(({blockIndex}) => chunk.data[blockIndex] !== BlockType.AIR);
|
|
}
|
|
|
|
block.chunk.data[block.blockIndex] = BlockType.AIR;
|
|
if (block.chunk.buffer !== undefined) {
|
|
block.chunk.buffer.delete();
|
|
delete block.chunk.buffer;
|
|
}
|
|
trimFaces(block.chunk);
|
|
|
|
const [bx, by, bz] = block.centerPosition;
|
|
|
|
const neighbors = [
|
|
{ block: blockLookup(world, bx - 1, by, bz), dir: '+x' },
|
|
{ block: blockLookup(world, bx + 1, by, bz), dir: '-x' },
|
|
{ block: blockLookup(world, bx, by - 1, bz), dir: '+y' },
|
|
{ block: blockLookup(world, bx, by + 1, bz), dir: '-y' },
|
|
{ block: blockLookup(world, bx, by, bz - 1), dir: '+z' },
|
|
{ block: blockLookup(world, bx, by, bz + 1), dir: '-z' },
|
|
];
|
|
|
|
neighbors
|
|
.filter(({ block }) => block.type !== BlockType.AIR &&
|
|
block.type !== BlockType.UNDEFINED)
|
|
.forEach(({ block, dir }) => {
|
|
makeFaces(block.chunk,
|
|
() => [blockIndex2Ijk(block.blockIndex)],
|
|
() => [{
|
|
block: BlockType.AIR,
|
|
dir,
|
|
faceCenter: faceCenter(block.centerPosition, dir),
|
|
}]);
|
|
trimFaces(block.chunk);
|
|
|
|
if (block.chunk.buffer !== undefined) {
|
|
block.chunk.buffer.delete();
|
|
delete block.chunk.buffer;
|
|
}
|
|
});
|
|
}
|
|
|
|
export function makeBlock(world, position, type) {
|
|
const block = blockLookup(world, ...position);
|
|
console.assert(block.type === BlockType.AIR);
|
|
|
|
block.chunk.data[block.blockIndex] = type;
|
|
block.type = type;
|
|
|
|
const [bx, by, bz] = block.centerPosition;
|
|
|
|
const neighbors = [
|
|
{ block: blockLookup(world, bx - 1, by, bz), dir: '-x', ndir: '+x' },
|
|
{ block: blockLookup(world, bx + 1, by, bz), dir: '+x', ndir: '-x' },
|
|
{ block: blockLookup(world, bx, by - 1, bz), dir: '-y', ndir: '+y' },
|
|
{ block: blockLookup(world, bx, by + 1, bz), dir: '+y', ndir: '-y' },
|
|
{ block: blockLookup(world, bx, by, bz - 1), dir: '-z', ndir: '+z' },
|
|
{ block: blockLookup(world, bx, by, bz + 1), dir: '+z', ndir: '-z' },
|
|
];
|
|
|
|
neighbors
|
|
.filter(({ block }) => block.type !== BlockType.UNDEFINED)
|
|
.forEach(({ block: nblock, dir, ndir }) => {
|
|
makeFaces(block.chunk,
|
|
() => [blockIndex2Ijk(block.blockIndex)],
|
|
() => [{
|
|
block: BlockType.AIR,
|
|
dir,
|
|
faceCenter: faceCenter(block.centerPosition, dir),
|
|
}]);
|
|
nblock.chunk.faces = nblock.chunk.faces.filter(f => (
|
|
f.blockIndex !== nblock.blockIndex ||
|
|
f.dir !== ndir
|
|
));
|
|
nblock.chunk.transparentFaces = nblock.chunk.transparentFaces.filter(f => (
|
|
f.blockIndex !== nblock.blockIndex ||
|
|
f.dir !== ndir
|
|
));
|
|
});
|
|
}
|
|
|
|
export async function initWorldGl(gl) {
|
|
const program = makeProgram(gl, VSHADER, 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,
|
|
};
|
|
}
|