bvh/teethTradBVH.html at master · BabylonJSGuide/bvh · GitHub

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<!DOCTYPE html>
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

    <title>Traditional BVH Pick</title>

    <script src= "babylon.max.js"></script>
    <script src = babylon.gui.min.js></script>
    <script src= "babylon.stlFileLoader.js"></script>
    <script src= "BVH_Acc_Structure_Iterative_Builder.js"></script>
    <script src = "bvhray.js"></script>


    <style>
        html, body {
            overflow: hidden;
            width: 100%;
            height: 100%;
            margin: 0;
            padding: 0;
        }

        #renderCanvas {
            width: 100%;
            height: 100%;
            touch-action: none;
        }
    </style>
</head>
<body>
    <canvas id="renderCanvas"></canvas>
    <script>

if (BABYLON.Engine.isSupported()) {
    var canvas = document.getElementById("renderCanvas");
    var engine = new BABYLON.Engine(canvas, true);


var createScene = function () {

    // This creates a basic Babylon Scene object (non-mesh)
    var scene = new BABYLON.Scene(engine);

    var camera = new BABYLON.ArcRotateCamera("Camera", 0, Math.PI / 2.2, 50, BABYLON.Vector3.Zero(), scene);

	camera.attachControl(canvas, true);

    // This creates a light, aiming 0,1,0 - to the sky (non-mesh)
    var light = new BABYLON.HemisphericLight("light1", new BABYLON.Vector3(0, 1, 0), scene);

    // Default intensity is 1. Let's dim the light a small amount
    light.intensity = 0.7;

    mat = new BABYLON.StandardMaterial("", scene);
    mat.diffuseColor = BABYLON.Color3.Red();

    let totalWork;
    let aabb_array = new Float32Array(2048 * 2048 * 4);
    // 2048 = width of texture, 2048 = height of texture, 4 = r,g,b, and a components

	BABYLON.SceneLoader.ImportMesh("", "https://dl.dropbox.com/s/669cwldog3kdssw/", "2020-05-25_002_002-LowerJaw.stl", scene, function (meshes) {
        let helmet = meshes[0];
        let positions = helmet.getVerticesData(BABYLON.VertexBuffer.PositionKind);
        console.log("P", positions.length / 3);
        let indices = helmet.getIndices();
        console.log("I", indices)
;        let total_number_of_triangles = indices.length / 3;
        console.log("TRI", total_number_of_triangles)
        totalWork = new Uint32Array(total_number_of_triangles);

        var vp0 = BABYLON.Vector3.Zero();
        var vp1 = BABYLON.Vector3.Zero();
        var vp2 = BABYLON.Vector3.Zero();

        let gui = BABYLON.GUI.AdvancedDynamicTexture.CreateFullscreenUI("myUI");
        let button = BABYLON.GUI.Button.CreateSimpleButton("button", "Click to Generate BVH");
        button.top = "0px";
        button.left = "0px";
        button.width = "150px";
        button.height = "150px";
        button.cornerRadius = 20;
        button.thickness = 4;
        button.horizontalAlignment = BABYLON.GUI.Control.HORIZONTAL_ALIGNMENT_RIGHT;
        button.children[0].color = "#DFF9FB";
        button.children[0].fontSize = 24;
        button.color = "white";
        button.background = "blue";


        let text1 = new BABYLON.GUI.TextBlock();
        text1.text = "";
        text1.color = "white";
        text1.fontSize = 24;
        text1.background = "blue";
        text1.width = "650px";
        text1.height = "70px";
        text1.cornerRadius = 20;
        text1.thickness = 4;
        text1.verticalAlignment = BABYLON.GUI.Control.VERTICAL_ALIGNMENT_TOP;
        text1.isVisible = false;

        gui.addControl(text1);


        let treeCluster;

        button.onPointerClickObservable.add(function () {
            button.isVisible = false
            // Build the BVH acceleration structure, which places a bounding box ('root' of the tree) around all of the
            // triangles of the entire mesh, then subdivides each box into 2 smaller boxes.  It continues until it reaches 1 triangle,
            // which it then designates as a 'leaf'
            //console.log("TL", totalWork, "AABB", aabb_array)
            let t0 = performance.now();
        var triangle_b_box_min = BABYLON.Vector3.Zero();
        var triangle_b_box_max = BABYLON.Vector3.Zero();
        var triangle_b_box_centroid = BABYLON.Vector3.Zero();

        for (let i = 0; i < total_number_of_triangles; i++) {

            triangle_b_box_min.set(Infinity, Infinity, Infinity);
            triangle_b_box_max.set(-Infinity, -Infinity, -Infinity);

            index0 = indices[3 * i];
		    index1 = indices[3 * i + 1];
		    index2 = indices[3 * i + 2];

            // record vertex positions
            vp0.set(positions[3 * index0], positions[3 * index0 + 1], positions[3 * index0 + 2]);
            vp1.set(positions[3 * index1], positions[3 * index1 + 1], positions[3 * index1 + 2]);
            vp2.set(positions[3 * index2], positions[3 * index2 + 1], positions[3 * index2 + 2]);


            triangle_b_box_min = BABYLON.Vector3.Minimize(triangle_b_box_min, vp0);
            triangle_b_box_max = BABYLON.Vector3.Maximize(triangle_b_box_max, vp0);
            triangle_b_box_min = BABYLON.Vector3.Minimize(triangle_b_box_min, vp1);
            triangle_b_box_max = BABYLON.Vector3.Maximize(triangle_b_box_max, vp1);
            triangle_b_box_min = BABYLON.Vector3.Minimize(triangle_b_box_min, vp2);
            triangle_b_box_max = BABYLON.Vector3.Maximize(triangle_b_box_max, vp2);

            triangle_b_box_centroid.set((triangle_b_box_min.x + triangle_b_box_max.x) * 0.5,
                                        (triangle_b_box_min.y + triangle_b_box_max.y) * 0.5,
                                        (triangle_b_box_min.z + triangle_b_box_max.z) * 0.5);

            aabb_array[9 * i + 0] = triangle_b_box_min.x;
            aabb_array[9 * i + 1] = triangle_b_box_min.y;
            aabb_array[9 * i + 2] = triangle_b_box_min.z;
            aabb_array[9 * i + 3] = triangle_b_box_max.x;
            aabb_array[9 * i + 4] = triangle_b_box_max.y;
            aabb_array[9 * i + 5] = triangle_b_box_max.z;
            aabb_array[9 * i + 6] = triangle_b_box_centroid.x;
            aabb_array[9 * i + 7] = triangle_b_box_centroid.y;
            aabb_array[9 * i + 8] = triangle_b_box_centroid.z;

            totalWork[i] = i;
        }

            BVH_Build_Iterative(totalWork, aabb_array);
            let t1 = performance.now();
            text1.text = `Time to Generate ${t1 - t0} milliseconds.`;
            text1.isVisible = true;
            console.log(buildnodes);

            let counter = 0;
            let totalTime = 0;
            scene.onPointerDown = function() {
                //let ray = new BABYLON.Ray(new BABYLON.Vector3(-8, 0.1, 0.1), BABYLON.Axis.X, 120);
                let ray = scene.createPickingRay(scene.pointerX, scene.pointerY, BABYLON.Matrix.Identity(), camera);
                //BABYLON.RayHelper.CreateAndShow(ray, scene, BABYLON.Color3.Red());

                let positions = helmet.getVerticesData(BABYLON.VertexBuffer.PositionKind);
                let indices = helmet.getIndices();

                const t0 = performance.now();
                let hits = [];
                hits = bvhRayIntersect(ray, buildnodes, helmet);
                const t1 = performance.now();
                text1.text = `Time for ray intersection ${t1 - t0} milliseconds.`;
                totalTime += t1 - t0;
                counter++;
                console.log("avg", totalTime / counter);
                text1.isVisible = true;
                for (let i = 0; i < hits.length; i++) {
                    box = BABYLON.MeshBuilder.CreateBox("", {size: 0.5}, scene);
                    box.position = ray.origin.add(ray.direction.normalize().scale(hits[i].distance))
                    box.material = mat;
                }

            };

        });

        gui.addControl(button);

    });

	return scene;

};


var scene = createScene();

engine.runRenderLoop(function () {
  scene.render();

});

window.addEventListener("resize", function () {
    engine.resize();
});
        }
    </script>
</body>
</html>