babylonjs note 05 build a village (09) Making Copies (02)

import { ArcRotateCamera, Color3, HemisphericLight, Mesh, MeshBuilder, Scene, StandardMaterial, Texture, Vector3, Vector4 } from "@babylonjs/core";
import { createApp } from "../utils";

/******Build Functions***********/
const buildGround = () => {
    // color
    const groundMat = new StandardMaterial("ground");
    groundMat.diffuseColor = new Color3(0, 1, 0);

    const ground = MeshBuilder.CreateGround('ground', { width: 15, height: 16 });
    ground.material = groundMat;
    return ground;
}

const buildBox = (width: number) => {
    // texture
    const boxMat = new StandardMaterial('boxMat');
    if (width === 2) {
        boxMat.diffuseTexture = new Texture('/assets/texture/ex01/semihouse.png');
    } else {
        boxMat.diffuseTexture = new Texture('/assets/texture/ex01/cubehouse.png')
    }

    //options parameter to set different images on each side
    const faceUV = [];
    if (width == 2) {
        faceUV[0] = new Vector4(0.6, 0.0, 1.0, 1.0); //rear face
        faceUV[1] = new Vector4(0.0, 0.0, 0.4, 1.0); //front face
        faceUV[2] = new Vector4(0.4, 0, 0.6, 1.0); //right side
        faceUV[3] = new Vector4(0.4, 0, 0.6, 1.0); //left side
    }
    else {
        faceUV[0] = new Vector4(0.5, 0.0, 0.75, 1.0); //rear face
        faceUV[1] = new Vector4(0.0, 0.0, 0.25, 1.0); //front face
        faceUV[2] = new Vector4(0.25, 0, 0.5, 1.0); //right side
        faceUV[3] = new Vector4(0.75, 0, 1.0, 1.0); //left side
    }
    // top 4 and bottom 5 not seen so not set

    /**** World Objects *****/
    const box = MeshBuilder.CreateBox('box', { width, faceUV, wrap: true })
    box.material = boxMat;
    box.position.y = 0.5;

    return box;
}

const buildRoof = (width: number) => {
    //texture
    const roofMat = new StandardMaterial('roofMat');
    roofMat.diffuseTexture = new Texture('/assets/texture/ex01/roof.jpg');

    const roof = MeshBuilder.CreateCylinder('roof', { diameter: 1.3, height: 1.2, tessellation: 3 });
    roof.material = roofMat;
    roof.scaling.x = 0.75;
    roof.scaling.y = width;
    roof.rotation.z = Math.PI / 2;
    roof.position.y = 1.22;

    return roof;
}

const buildHouse = (width: number) => {
    const box = buildBox(width);
    const roof = buildRoof(width);

    return Mesh.MergeMeshes([box, roof], true, false, undefined, false, true);
}

const app = createApp((canvas, engine) => {
    const scene = new Scene(engine);

    const camera = new ArcRotateCamera("camera", -Math.PI / 2, Math.PI / 2.5, 15, Vector3.Zero(), scene);
    camera.attachControl(canvas, true);

    const light = new HemisphericLight('light', new Vector3(1, 1, 0), scene);

    // customize your scene here
    const ground = buildGround();

    const detached_house = buildHouse(1); //width of house 1 or 2
    detached_house!.rotation.y = -Math.PI / 16;
    detached_house!.position.x = -6.8
    detached_house!.position.z = -2.5;

    const semi_house = buildHouse(2);
    semi_house!.rotation.y = -Math.PI / 16;
    semi_house!.position.x = -4.5;
    semi_house!.position.z = 3;

    const places = []; //each entry is an array [house type, rotation, x, z]
    places.push([1, -Math.PI / 16, -6.8, 2.5]);
    places.push([2, -Math.PI / 16, -4.5, 3]);
    places.push([2, -Math.PI / 16, -1.5, 4]);
    places.push([2, -Math.PI / 3, 1.5, 6]);
    places.push([2, 15 * Math.PI / 16, -6.4, -1.5]);
    places.push([1, 15 * Math.PI / 16, -4.1, -1]);
    places.push([2, 15 * Math.PI / 16, -2.1, -0.5]);
    places.push([1, 5 * Math.PI / 4, 0, -1]);
    places.push([1, Math.PI + Math.PI / 2.5, 0.5, -3]);
    places.push([2, Math.PI + Math.PI / 2.1, 0.75, -5]);
    places.push([1, Math.PI + Math.PI / 2.25, 0.75, -7]);
    places.push([2, Math.PI / 1.9, 4.75, -1]);
    places.push([1, Math.PI / 1.95, 4.5, -3]);
    places.push([2, Math.PI / 1.9, 4.75, -5]);
    places.push([1, Math.PI / 1.9, 4.75, -7]);
    places.push([2, -Math.PI / 3, 5.25, 2]);
    places.push([1, -Math.PI / 3, 6, 4]);

    //Create instances from the first two that were built 
    const houses = [];
    for (let i = 0; i < places.length; i++) {
        if (places[i][0] === 1) {
            houses[i] = detached_house!.createInstance("house" + i);
        }
        else {
            houses[i] = semi_house!.createInstance("house" + i);
        }
        houses[i].rotation.y = places[i][1];
        houses[i].position.x = places[i][2];
        houses[i].position.z = places[i][3];
    }

    return scene;
})

app.run();