NTU-ICG-HW1/toonShading.html at main · Vincentllxz/NTU-ICG-HW1 · GitHub

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<html>

<head>
<title>ICG WebGL &mdash; HW1 - Toon Shading</title>
<meta http-equiv="content-type" content="text/html; charset=ISO-8859-1">

<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css" rel="stylesheet">
<link rel="stylesheet" type="text/css" href="style.css">

<script type="text/javascript" src="./js/glMatrix-0.9.5.min.js"></script>
<script type="text/javascript" src="./js/webgl-utils.js"></script>


<script id="fragmentShader" type="fragment">
    precision mediump float;

    uniform mat4 uMVMatrix;
    uniform mat4 uPMatrix;
    uniform float Ka;
    uniform float Ks;
    uniform float Kd;
    uniform float Shininess;
    uniform vec3 lightLoc1;
    uniform vec3 lightLoc2;
    uniform vec3 lightColor1;
    uniform vec3 lightColor2;

    varying vec4 fragcolor;
    varying vec3 mvVertex;
    varying vec3 mvNormal;
    varying vec3 ndc;

    void main(void) {
        if (ndc.x < -0.9 || ndc.x > 0.9) discard;

        float AIntensity = Ka;

        vec3 V = -normalize(mvVertex);
        vec3 N = normalize(mvNormal);

        vec3 L1 = normalize(lightLoc1 - mvVertex);
        vec3 R1 = reflect(-L1, N);

        vec3 L2 = normalize(lightLoc2 - mvVertex);
        vec3 R2 = reflect(-L2, N);

        float NdotL1 = max(dot(N, L1), 0.0);
        float NdotL2 = max(dot(N, L2), 0.0);
        float DIntensity1 = Kd * NdotL1;
        float DIntensity2 = Kd * NdotL2;

        float CosN1 = pow(max(dot(R1, V), 0.0), Shininess);
        float CosN2 = pow(max(dot(R2, V), 0.0), Shininess);
        float SIntensity1 = Ks * CosN1;
        float SIntensity2 = Ks * CosN2;

        vec3 color = ceil(AIntensity * 12.0) / 12.0 * vec3(fragcolor) + (ceil((DIntensity1 + SIntensity1) * 12.0) / 12.0 * lightColor1 + ceil((DIntensity2 + SIntensity2) * 12.0) / 12.0 * lightColor2) * vec3(fragcolor);
        gl_FragColor = vec4(color, 1.0);
    }
</script>


<script id="vertexShader" type="vertex">
    precision mediump float;

    attribute vec3 aVertexPosition;
    attribute vec3 aFrontColor;
    attribute vec3 aVertexNormal;

    uniform mat4 uMVMatrix;
    uniform mat4 uPMatrix;

    varying vec4 fragcolor;
    varying vec3 mvVertex;
    varying vec3 mvNormal;
    varying vec3 ndc;

    void main(void) {
        gl_Position = uPMatrix * uMVMatrix * vec4(aVertexPosition, 1.0);
        mvVertex = (uMVMatrix * vec4(aVertexPosition, 1.0)).xyz;
        mvNormal = normalize(mat3(uMVMatrix) * aVertexNormal);
        fragcolor = vec4(aFrontColor,1.0);
        vec4 clipPos = uPMatrix * uMVMatrix * vec4(aVertexPosition, 1.0);
        gl_Position = clipPos;
        ndc = clipPos.xyz / clipPos.w;
    }
</script>

<script type="text/javascript">
    // common variables
    var gl;
    var shaderProgram;

    var mvMatrix = mat4.create();
    var pMatrix  = mat4.create();
    var shearMatrix = mat4.create();

    var teapotAngle = 180;
    var lastTime    = 0;

    var ka = 0.2;
    var kd = 0.5;
    var ks = 0.6;
    var shininess = 20.0;
    var light_locations1 = new Float32Array([30., 20., -10.]);
    var light_locations2 = new Float32Array([-20., -10., -30.]);
    var light_color1 = new Float32Array([20., 5., 5.]);
    var light_color2 = new Float32Array([5., 5., 30.]);
    var clip = 1;


    //*************************************************
    // Initialization functions
    //*************************************************
    function initGL(canvas) {
        try {
            gl = canvas.getContext("webgl") || canvas.getContext("experimental-webgl");
            gl.viewportWidth  = canvas.width;
            gl.viewportHeight = canvas.height;
        }
        catch (e) {
        }

        if (!gl) {
            alert("Could not initialise WebGL");
        }
    }

    function getShader(gl, id) {
        var shaderScript = document.getElementById(id);
        if (!shaderScript) {
            return null;
        }

        var shaderSource = "";
        var k = shaderScript.firstChild;
        while (k) {
            if (k.nodeType == 3) {
                shaderSource += k.textContent;
            }

            k = k.nextSibling;
        }

        var shader;
        if (shaderScript.type == "fragment") {
            shader = gl.createShader(gl.FRAGMENT_SHADER);
        }
        else if (shaderScript.type == "vertex") {
            shader = gl.createShader(gl.VERTEX_SHADER);
        }
        else {
            return null;
        }

        gl.shaderSource(shader, shaderSource);
        gl.compileShader(shader);

        if (!gl.getShaderParameter(shader, gl.COMPILE_STATUS)) {
            alert(gl.getShaderInfoLog(shader));
            return null;
        }

        return shader;
    }

    function initShaders() {
        var fragmentShader = getShader(gl, "fragmentShader");
        var vertexShader   = getShader(gl, "vertexShader");

        shaderProgram = gl.createProgram();
        gl.attachShader(shaderProgram, vertexShader);
        gl.attachShader(shaderProgram, fragmentShader);
        gl.linkProgram(shaderProgram);

        if (!gl.getProgramParameter(shaderProgram, gl.LINK_STATUS)) {
            alert("Could not initialise shaders");
        }

        gl.useProgram(shaderProgram);

        shaderProgram.vertexPositionAttribute = gl.getAttribLocation(shaderProgram, "aVertexPosition");
        gl.enableVertexAttribArray(shaderProgram.vertexPositionAttribute);
        shaderProgram.vertexFrontColorAttribute = gl.getAttribLocation(shaderProgram, "aFrontColor");
        gl.enableVertexAttribArray(shaderProgram.vertexFrontColorAttribute);
        shaderProgram.vertexNormalAttribute = gl.getAttribLocation(shaderProgram, "aVertexNormal");
        gl.enableVertexAttribArray(shaderProgram.vertexNormalAttribute);

        shaderProgram.ka = gl.getUniformLocation(shaderProgram, "Ka");
        shaderProgram.kd = gl.getUniformLocation(shaderProgram, "Kd");
        shaderProgram.ks = gl.getUniformLocation(shaderProgram, "Ks");
        shaderProgram.shininess = gl.getUniformLocation(shaderProgram, "Shininess");
        gl.uniform1f(gl.getUniformLocation(shaderProgram, "Shininess"), shininess);
        gl.uniform3fv(gl.getUniformLocation(shaderProgram, "lightLoc1"), light_locations1);
        gl.uniform3fv(gl.getUniformLocation(shaderProgram, "lightLoc2"), light_locations2);
        gl.uniform3fv(gl.getUniformLocation(shaderProgram, "lightColor1"), light_color1);
        gl.uniform3fv(gl.getUniformLocation(shaderProgram, "lightColor2"), light_color2);

        shaderProgram.pMatrixUniform  = gl.getUniformLocation(shaderProgram, "uPMatrix");
        shaderProgram.mvMatrixUniform = gl.getUniformLocation(shaderProgram, "uMVMatrix");
    }

    function setMatrixUniforms() {
        gl.uniformMatrix4fv(shaderProgram.pMatrixUniform, false, pMatrix);
        gl.uniformMatrix4fv(shaderProgram.mvMatrixUniform, false, mvMatrix);
    }

    function degToRad(degrees) {
        return degrees * Math.PI / 180;
    }

    function Model(drawType){
        this.drawType = drawType;

        this.VertexNormalBuffer;
        this.VertexPositionBuffer;
        this.VertexFrontColorBuffer;
    }

    var model0 = new Model(0);
    var model1 = new Model(0);
    var model2 = new Model(0);

    function handleLoadedTeapot(modelName, modelData) {
        modelName.VertexPositionBuffer = gl.createBuffer();
        gl.bindBuffer(gl.ARRAY_BUFFER, modelName.VertexPositionBuffer);
        gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(modelData.vertexPositions), gl.STATIC_DRAW);
        modelName.VertexPositionBuffer.itemSize = 3;
        modelName.VertexPositionBuffer.numItems = modelData.vertexPositions.length / 3;

        modelName.VertexNormalBuffer = gl.createBuffer();
        gl.bindBuffer(gl.ARRAY_BUFFER, modelName.VertexNormalBuffer);
        gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(modelData.vertexNormals), gl.STATIC_DRAW);
        modelName.VertexNormalBuffer.itemSize = 3;
        modelName.VertexNormalBuffer.numItems = modelData.vertexNormals.length / 3;

        modelName.VertexFrontColorBuffer = gl.createBuffer();
        gl.bindBuffer(gl.ARRAY_BUFFER, modelName.VertexFrontColorBuffer);
        gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(modelData.vertexFrontcolors), gl.STATIC_DRAW);
        modelName.VertexFrontColorBuffer.itemSize = 3;
        modelName.VertexFrontColorBuffer.numItems = modelData.vertexFrontcolors.length / 3;
    }

    function loadModel(model, i) {
        const modelObjects = [model0, model1, model2];
        const targetModel = modelObjects[i];
        var request = new XMLHttpRequest();
        request.open("GET", "./model/" + model + ".json");
        request.onreadystatechange = function () {
            if (request.readyState == 4) {
                handleLoadedTeapot(targetModel, JSON.parse(request.responseText));
            }
        }
        request.send();
    }


    //*************************************************
    // Rendering functions
    //*************************************************
    /*
        TODO HERE:
        add two or more objects showing on the canvas
        (it needs at least three objects showing at the same time)
    */
    function drawScene() {
        gl.viewport(0, 0, gl.viewportWidth, gl.viewportHeight);
        gl.clearColor(ka, ka, ka, 1.0);
        gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);

        if (model0.VertexPositionBuffer == null ||
            model1.VertexPositionBuffer == null ||
            model2.VertexPositionBuffer == null) {
            return;
        }

        // Setup Projection Matrix
        mat4.perspective(45, gl.viewportWidth / gl.viewportHeight, 0.1, 100.0, pMatrix);

        let models = [model0, model1, model2];

        for (let i = 0; i < models.length; i++) {
            // Setup Model-View Matrix
            mat4.identity(mvMatrix);
            mat4.translate(mvMatrix, [0, 0, 0]);

            // transform
            var trans = update_trans(i);
            mat4.translate(mvMatrix, trans);

            // rotate
            var rotateVec_init = [0,0,0];
            mat4.rotate(mvMatrix, degToRad(rotateVec_init[0]), [1, 0, 0]);
            mat4.rotate(mvMatrix, degToRad(rotateVec_init[1]), [0, 1, 0]);
            mat4.rotate(mvMatrix, degToRad(rotateVec_init[2]), [0, 0, 1]);

            var rotateVec = update_rotate(i);
            mat4.rotate(mvMatrix, degToRad(rotateVec[0]), [1, 0, 0]);
            mat4.rotate(mvMatrix, degToRad(rotateVec[1] + teapotAngle), [0, 1, 0]);
            mat4.rotate(mvMatrix, degToRad(rotateVec[2]), [0, 0, 1]);

            // scale
            var scaleVec = update_scaling(i);
            mat4.scale(mvMatrix, [1.0, 1.0, 1.0]);
            mat4.scale(mvMatrix, scaleVec);

            // Shear
            var shearValue = update_shear(i);
            mat4.identity(shearMatrix);
            shearMatrix[4] = 1 / Math.tan(degToRad(shearValue));
            mat4.multiply(mvMatrix, shearMatrix, mvMatrix);

            // set shader uniform
            setMatrixUniforms();

            if (breathing) {
                let now = new Date().getTime();
                let elapsed = (now - breathingStartTime) / 1000;

                let intensity = 0.1 + 0.9 * (0.5 + 0.5 * Math.sin(elapsed * 2.0));

                light_color1[0] = 10 * intensity;
                light_color1[1] = 6 * intensity;
                light_color1[2] = 6 * intensity;

                light_color2[0] = 10 * intensity;
                light_color2[1] = 10 * intensity;
                light_color2[2] = 10 * intensity;
            }

            gl.uniform1f(gl.getUniformLocation(shaderProgram, "Ka"), ka);
            gl.uniform1f(gl.getUniformLocation(shaderProgram, "Kd"), kd);
            gl.uniform1f(gl.getUniformLocation(shaderProgram, "Ks"), ks);
            gl.uniform1f(gl.getUniformLocation(shaderProgram, "Shininess"), shininess);
            gl.uniform3fv(gl.getUniformLocation(shaderProgram, "lightLoc1"), light_locations1);
            gl.uniform3fv(gl.getUniformLocation(shaderProgram, "lightLoc2"), light_locations2);
            gl.uniform3fv(gl.getUniformLocation(shaderProgram, "lightColor1"), light_color1);
            gl.uniform3fv(gl.getUniformLocation(shaderProgram, "lightColor2"), light_color2);

            // Position buffer
            gl.bindBuffer(gl.ARRAY_BUFFER, models[i].VertexPositionBuffer);
            gl.vertexAttribPointer(shaderProgram.vertexPositionAttribute,
                                models[i].VertexPositionBuffer.itemSize,
                                gl.FLOAT,
                                false,
                                0,
                                0);

            // Color buffer
            gl.bindBuffer(gl.ARRAY_BUFFER, models[i].VertexFrontColorBuffer);
            gl.vertexAttribPointer(shaderProgram.vertexFrontColorAttribute,
                                models[i].VertexFrontColorBuffer.itemSize,
                                gl.FLOAT,
                                false,
                                0,
                                0);

            // Normal buffer
            gl.bindBuffer(gl.ARRAY_BUFFER, models[i].VertexNormalBuffer);
            gl.vertexAttribPointer(shaderProgram.vertexNormalAttribute,
                                models[i].VertexNormalBuffer.itemSize,
                                gl.FLOAT,
                                false,
                                0,
                                0);

            // 畫圖
            gl.drawArrays(gl.TRIANGLES, 0, models[i].VertexPositionBuffer.numItems);
        }


    }

    function animate() {
        var timeNow = new Date().getTime();
        if (lastTime != 0) {
            var elapsed = timeNow - lastTime;
            teapotAngle += 0.03 * elapsed;
        }

        lastTime = timeNow;
    }

    function tick() {
        requestAnimFrame(tick);
        drawScene();
        animate();
    }

    function webGLStart() {
        var canvas = document.getElementById("ICG-canvas");
        initGL(canvas);
        initShaders();
        loadModel("Csie", 0);
        loadModel("Teapot", 1);
        loadModel("Car_road", 2);

        initiate();

        gl.clearColor(ka, ka, ka, 1.0);
        gl.enable(gl.DEPTH_TEST);

        tick();
    }


    //*************************************************
    // Parsing parameters
    //*************************************************
    function update_ambient_light(){
        ka = document.getElementById("am_ka").value;
    }

    function update_diffuse_light(){
        kd = document.getElementById("am_kd").value;
    }

    function update_specular_light(){
        ks = document.getElementById("am_ks").value;
    }

    function update_shininess(){
        shininess = document.getElementById("shininess").value;
    }

    function update_light_location(){
        light_locations1[0] = document.getElementById("llocX1").value;
        light_locations1[1] = document.getElementById("llocY1").value;
        light_locations1[2] = document.getElementById("llocZ1").value;

        light_locations2[0] = document.getElementById("llocX2").value;
        light_locations2[1] = document.getElementById("llocY2").value;
        light_locations2[2] = document.getElementById("llocZ2").value;
    }

    function update_light_color(){
        light_color1[0] = document.getElementById("R1").value;
        light_color1[1] = document.getElementById("G1").value;
        light_color1[2] = document.getElementById("B1").value;

        light_color2[0] = document.getElementById("R2").value;
        light_color2[1] = document.getElementById("G2").value;
        light_color2[2] = document.getElementById("B2").value;
    }

    function update_trans(i){
        var tx = document.getElementById("transX" + i).value;
        var ty = document.getElementById("transY" + i).value;
        var tz = document.getElementById("transZ" + i).value;

        return vec3.create([tx, ty, tz]);
    }

    function update_rotate(i){
        var rx = document.getElementById("rotateX" + i).value;
        var ry = document.getElementById("rotateY" + i).value;
        var rz = document.getElementById("rotateZ" + i).value;

        return vec3.create([rx, ry, rz]);
    }

    function update_scaling(i){
        var s = document.getElementById("scaling" + i).value;

        return vec3.create([s, s, s]);
    }

    function update_shear(i){
        var sh = document.getElementById("shear" + i).value;

        return sh;
    }

    function changeModel(i){
        const modelName = document.getElementById("modelSelector" + i).value;
        loadModel(modelName, i);
    }

    function initiate() {
        for (let i = 0; i < 3; i++) {
            document.getElementById("rotateX" + i).value = 0;
            document.getElementById("rotateY" + i).value = 0;
            document.getElementById("rotateZ" + i).value = 0;

            document.getElementById("shear" + i).value = 90;
        }
        document.getElementById("scaling0").value = 10.0;
        document.getElementById("scaling1").value = 1.0;
        document.getElementById("scaling2").value = 10.0;

        document.getElementById("transX0").value = -45.0;
        document.getElementById("transY0").value = -4.;
        document.getElementById("transZ0").value = -50.;
        document.getElementById("transX1").value = 0.;
        document.getElementById("transY1").value = 0.;
        document.getElementById("transZ1").value = -50.;
        document.getElementById("transX2").value = 45.;
        document.getElementById("transY2").value = -6.;
        document.getElementById("transZ2").value = -50.;

        document.getElementById("am_ka").value = 0.2;
        document.getElementById("am_kd").value = 0.1;
        document.getElementById("am_ks").value = 0.1;
        document.getElementById("shininess").value = 20.0;

        document.getElementById("llocX1").value = 50;
        document.getElementById("llocY1").value = 30;
        document.getElementById("llocZ1").value = -25;
        document.getElementById("llocX2").value = -50;
        document.getElementById("llocY2").value = -30;
        document.getElementById("llocZ2").value = -25;

        document.getElementById("R1").value = 5.0;
        document.getElementById("G1").value = 3.0;
        document.getElementById("B1").value = 3.0;
        document.getElementById("R2").value = 5.0;
        document.getElementById("G2").value = 5.0;
        document.getElementById("B2").value = 5.0;

        document.getElementById("modelSelector0").value = "Csie";
        document.getElementById("modelSelector1").value = "Teapot";
        document.getElementById("modelSelector2").value = "Car_road";

        loadModel("Csie", 0);
        loadModel("Teapot", 1);
        loadModel("Car_road", 2);

        update_ambient_light();
        update_diffuse_light();
        update_specular_light();
        update_light_location();
        update_light_color();
    }

    function initWhite() {
        document.getElementById("R1").value = 5.0;
        document.getElementById("G1").value = 5.0;
        document.getElementById("B1").value = 5.0;
        document.getElementById("R2").value = 5.0;
        document.getElementById("G2").value = 5.0;
        document.getElementById("B2").value = 5.0;
        update_light_color();
    }

    var flashInterval;

    function randColor(min, max) {
        return min + Math.random() * (max - min);
    }

    function toggleLightEffect(checked) {
        if (!checked) {
            clearInterval(flashInterval);
            flashing = false;
            initWhite();
            return;
        } else {
            flashInterval = setInterval(() => {
                light_color1[0] = randColor(5, 10);
                light_color1[1] = randColor(3, 10);
                light_color1[2] = randColor(0, 10);

                light_color2[0] = randColor(3, 10);
                light_color2[1] = randColor(5, 10);
                light_color2[2] = randColor(0, 10);
            }, 100);
        }
    }

    var breathing = false;
    var breathingStartTime = null;

    function toggleBreathingEffect(checked) {
        if (checked) {
            breathing = true;
            breathingStartTime = new Date().getTime();
        } else {
            breathing = false;
            initWhite();
        }
    }

</script>
</head>

<body onload="webGLStart();">
    <h1 style="font-weight: bold; margin-top: 20px;">
        <label for="shading">Toon shading</label>
    </h1>

    <div style="text-align: center;">
        <canvas id="ICG-canvas" style="border: none;" width="1800" height="500" style="border: 1px solid rgb(186, 104, 104);"></canvas>
    </div>

    <div style="margin: 0; padding-top: 8px;">
        <p style="font-weight: bold; font-size: 20px; color: #fff; background: #333;
           padding: 8px 12px; border-radius: 8px; box-shadow: 0 2px 6px rgba(0,0,0,0.2);">
            <br>
            <span>Tap the button to RESET: </span><button id="resetButton" onclick="initiate()">Reset</button>
            <br>
            <br>
        </p>

        <br>
        <div style="display: flex; gap: 30px; padding: 10px 0;">
            <label class="switch">
              <input type="checkbox" id="flashCheckbox" onchange="toggleLightEffect(this.checked)">
              <span class="slider"></span>
              <span class="label-text">Special Light Effect</span>
            </label>

            <label class="switch">
              <input type="checkbox" id="breathingCheckbox" onchange="toggleBreathingEffect(this.checked)">
              <span class="slider"></span>
              <span class="label-text">Breathing Light Effect</span>
            </label>
        </div>
        <br>

        <span><b>Ambient Light</b></span>
        <table>
            <tr>
                <td>Ka: <input style="max-width: 70%; vertical-align: middle;" id="am_ka" type="range" autocomplete="off" value="0.1" max="1." min="0." step="0.05" oninput="update_ambient_light()"></td>
            </tr>
        </table>
        <span><b>Diffuse Light</b></span>
        <table>
            <tr>
                <td>Kd: <input style="max-width: 70%; vertical-align: middle;" id="am_kd" type="range" autocomplete="off" value="0.1" max="1." min="0." step="0.05" oninput="update_diffuse_light()"></td>
            </tr>
        </table>
        <span><b>Specular Light</b></span>
        <table>
            <tr>
                <td>Ks: <input style="max-width: 70%; vertical-align: middle;" id="am_ks" type="range" autocomplete="off" value="0.1" max="1." min="0." step="0.05" oninput="update_specular_light()"></td>
            </tr>
        </table>
        <span><b>Shininess</b></span>
        <table>
            <tr>
                <td>Shininess: <input style="max-width: 70%; vertical-align: middle;" id="shininess" type="range" autocomplete="off" value="5" max="300" min="1" oninput="update_shininess()"></td>
            </tr>
        </table>
        <br>
        <span><b>Light 1</b></span>
        <table>
            <tr>
                <td>X: <input style="max-width: 70%; vertical-align: middle;" id="llocX1" type="range" autocomplete="off" value="30." max="40." min="-40." oninput="update_light_location()"></td>
                <td>Y: <input style="max-width: 70%; vertical-align: middle;" id="llocY1" type="range" autocomplete="off" value="20." max="40." min="-40." oninput="update_light_location()"></td>
                <td>Z: <input style="max-width: 70%; vertical-align: middle;" id="llocZ1" type="range" autocomplete="off" value="-25." max="0." min="-75." oninput="update_light_location()"></td>
            </tr>
            <tr>
                <td>R: <input style="max-width: 70%; vertical-align: middle;" id="R1" type="range" autocomplete="off" value="50." max="255." min="0." oninput="update_light_color()"></td>
                <td>G: <input style="max-width: 70%; vertical-align: middle;" id="G1" type="range" autocomplete="off" value="0." max="255." min="0." oninput="update_light_color()"></td>
                <td>B: <input style="max-width: 70%; vertical-align: middle;" id="B1" type="range" autocomplete="off" value="0." max="255." min="0." oninput="update_light_color()"></td>
            </tr>
        </table>
        <span><b>Light 2</b></span>
        <table>
            <tr>
                <td>X: <input style="max-width: 70%; vertical-align: middle;" id="llocX2" type="range" autocomplete="off" value="30." max="40." min="-40." oninput="update_light_location()"></td>
                <td>Y: <input style="max-width: 70%; vertical-align: middle;" id="llocY2" type="range" autocomplete="off" value="20." max="40." min="-40." oninput="update_light_location()"></td>
                <td>Z: <input style="max-width: 70%; vertical-align: middle;" id="llocZ2" type="range" autocomplete="off" value="-25." max="0." min="-75." oninput="update_light_location()"></td>
            </tr>
            <tr>
                <td>R: <input style="max-width: 70%; vertical-align: middle;" id="R2" type="range" autocomplete="off" value="0." max="255." min="0." oninput="update_light_color()"></td>
                <td>G: <input style="max-width: 70%; vertical-align: middle;" id="G2" type="range" autocomplete="off" value="0." max="255." min="0." oninput="update_light_color()"></td>
                <td>B: <input style="max-width: 70%; vertical-align: middle;" id="B2" type="range" autocomplete="off" value="50." max="255." min="0." oninput="update_light_color()"></td>
            </tr>
        </table>
        <br>
        <table>
            <span>Set the light color to White: </span><button id="ColorButton" onclick="initWhite()">White</button>
        </table>
        </br>

        <div class="row">
            <div class="col-sm">
                <span>Model</span>
                <span>Choose a model:</span>
                <select id="modelSelector0" onchange="changeModel(0)">
                    <option value="Teapot">Teapot</option>
                    <option value="Csie">Csie</option>
                    <option value="Car_road">Car_road</option>
                    <option value="Fighter">Fighter</option>
                    <option value="Longteap">Longteap</option>
                    <option value="Mig27">Mig27</option>
                    <option value="Plant">Plant</option>
                    <option value="Tomcat">Tomcat</option>
                    <option value="Church_s">Church_s</option>
                    <option value="Easter">Easter</option>
                    <option value="Kangaroo">Kangaroo</option>
                    <option value="Mercedes">Mercedes</option>
                    <option value="Patchair">Patchair</option>
                </select>
                <br>

                <span><b>Scaling:</b></span>
                <br>
                <br>
                <input type="range" id="scaling0" min="0.1" max="50" step="0.1" value="1" style="width: 500px;" oninput="update_scaling(0)">
                <br>
                <br>
                <span><b>Shear:</b></span>
                <br>
                <br>
                <input type="range" id="shear0" min="45" max="135" step="1" value="90" style="width: 500px;" oninput="update_shear(0)">
                <br>
                <br>

                <span>Object</span>
                <table>
                    <tr>
                    <th></th>
                    <th>X axis</th>
                    <th>Y axis</th>
                    <th>Z axis</th>
                    </tr>
                    <tr>
                        <td>Trans.</td>
                        <td><input id="transX0" type="range" autocomplete="off" value="-25." max="80." min="-80." oninput="update_trans(0)"></td>
                        <td><input id="transY0" type="range" autocomplete="off" value="0." max="50." min="-50." oninput="update_trans(0)"></td>
                        <td><input id="transZ0" type="range" autocomplete="off" value="-50." max="0." min="-120." oninput="update_trans(0)"></td>
                    </tr>
                    <tr>
                        <td>Rotate</td>
                        <td><input id="rotateX0" type="range" autocomplete="off" value="0." max="180." min="-180." oninput="update_rotate(0)"></td>
                        <td><input id="rotateY0" type="range" autocomplete="off" value="0." max="180." min="-180." oninput="update_rotate(0)"></td>
                        <td><input id="rotateZ0" type="range" autocomplete="off" value="0." max="180." min="-180." oninput="update_rotate(0)"></td>
                    </tr>
                </table>
                <br>
                <br>
            </div>
            <div class="col-sm">

                <span>Model</span>
                <span>Choose a model:</span>
                <select id="modelSelector1" onchange="changeModel(1)">
                    <option value="Teapot">Teapot</option>
                    <option value="Csie">Csie</option>
                    <option value="Car_road">Car_road</option>
                    <option value="Fighter">Fighter</option>
                    <option value="Longteap">Longteap</option>
                    <option value="Mig27">Mig27</option>
                    <option value="Plant">Plant</option>
                    <option value="Tomcat">Tomcat</option>
                    <option value="Church_s">Church_s</option>
                    <option value="Easter">Easter</option>
                    <option value="Kangaroo">Kangaroo</option>
                    <option value="Mercedes">Mercedes</option>
                    <option value="Patchair">Patchair</option>
                </select>
                <br>

                <span><b>Scaling:</b></span>
                <br>
                <br>
                <input type="range" id="scaling1" min="0.1" max="50" step="0.1" value="1" style="width: 500px;" oninput="update_scaling(1)">
                <br>
                <br>
                <span><b>Shear:</b></span>
                <br>
                <br>
                <input type="range" id="shear1" min="45" max="135" step="1" value="90" style="width: 500px;" oninput="update_shear(1)">
                <br>
                <br>

                <span>Object</span>
                <table>
                    <tr>
                    <th></th>
                    <th>X axis</th>
                    <th>Y axis</th>
                    <th>Z axis</th>
                    </tr>
                    <tr>
                        <td>Trans.</td>
                        <td><input id="transX1" type="range" autocomplete="off" value="0." max="80." min="-80." oninput="update_trans(1)"></td>
                        <td><input id="transY1" type="range" autocomplete="off" value="0." max="50." min="-50." oninput="update_trans(1)"></td>
                        <td><input id="transZ1" type="range" autocomplete="off" value="-50." max="0." min="-120." oninput="update_trans(1)"></td>
                    </tr>
                    <tr>
                        <td>Rotate</td>
                        <td><input id="rotateX1" type="range" autocomplete="off" value="0." max="180." min="-180." oninput="update_rotate(1)"></td>
                        <td><input id="rotateY1" type="range" autocomplete="off" value="0." max="180." min="-180." oninput="update_rotate(1)"></td>
                        <td><input id="rotateZ1" type="range" autocomplete="off" value="0." max="180." min="-180." oninput="update_rotate(1)"></td>
                    </tr>
                </table>
                <br>
                <br>
            </div>
            <div class="col-sm">
                <span>Model</span>
                <span>Choose a model:</span>
                <select id="modelSelector2" onchange="changeModel(2)">
                    <option value="Teapot">Teapot</option>
                    <option value="Csie">Csie</option>
                    <option value="Car_road">Car_road</option>
                    <option value="Fighter">Fighter</option>
                    <option value="Longteap">Longteap</option>
                    <option value="Mig27">Mig27</option>
                    <option value="Plant">Plant</option>
                    <option value="Tomcat">Tomcat</option>
                    <option value="Church_s">Church_s</option>
                    <option value="Easter">Easter</option>
                    <option value="Kangaroo">Kangaroo</option>
                    <option value="Mercedes">Mercedes</option>
                    <option value="Patchair">Patchair</option>
                </select>
                <br>

                <span><b>Scaling:</b></span>
                <br>
                <br>
                <input type="range" id="scaling2" min="0.1" max="50" step="0.1" value="1" style="width: 500px;" oninput="update_scaling(2)">
                <br>
                <br>
                <span><b>Shear:</b></span>
                <br>
                <br>
                <input type="range" id="shear2" min="45" max="135" step="1" value="90" style="width: 500px;" oninput="update_shear(2)">
                <br>
                <br>

                <span>Object</span>
                <table>
                    <tr>
                    <th></th>
                    <th>X axis</th>
                    <th>Y axis</th>
                    <th>Z axis</th>
                    </tr>
                    <tr>
                        <td>Trans.</td>
                        <td><input id="transX2" type="range" autocomplete="off" value="25." max="80." min="-80." oninput="update_trans(2)"></td>
                        <td><input id="transY2" type="range" autocomplete="off" value="0." max="50." min="-50." oninput="update_trans(2)"></td>
                        <td><input id="transZ2" type="range" autocomplete="off" value="-50." max="0." min="-120." oninput="update_trans(2)"></td>
                    </tr>
                    <tr>
                        <td>Rotate</td>
                        <td><input id="rotateX2" type="range" autocomplete="off" value="0." max="180." min="-180." oninput="update_rotate(2)"></td>
                        <td><input id="rotateY2" type="range" autocomplete="off" value="0." max="180." min="-180." oninput="update_rotate(2)"></td>
                        <td><input id="rotateZ2" type="range" autocomplete="off" value="0." max="180." min="-180." oninput="update_rotate(2)"></td>
                    </tr>
                </table>
                <br>
                <br>
            </div>
        </div>
    </div>
</body>

</html>