auto restart

docker-compose.yml

@@ -1,7 +1,11 @@
-services:
-  cg1:
-    image: nginx:alpine
-    volumes:
-      - ./src:/usr/share/nginx/html:ro
-    ports:
-      - "8080:80"
+services:
+  cg1:
+    image: nginx:alpine
+    volumes:
+      - ./src:/usr/share/nginx/html:ro
+    networks:
+      - public
+    restart: unless-stopped
+networks:
+  public:
+    external: true

src/index.html

@@ -6,12 +6,10 @@
 	<title>CG1 MDI</title>
 	<script src="matrix-math.js"></script>
 	<script src="shader.js"></script>
-	<script src="wavefront.js"></script>
 	<script src="script.js"></script>
 	<style>
 		:root {
 			font-size: 20px;
-			--padding: 10px;
 		}
 
 		html, body {
@@ -46,10 +44,10 @@
 			display: block;
 			background-color: #181825;
 		}
-		#stats {
+		#stats, #controls {
 			position: absolute;
-			top: var(--padding);
-			padding: var(--padding);
+			top: 20px;
+			padding: 20px;
 			display: block;
 			border: solid 2px #11111b;
 			background-color: #313244;
@@ -57,7 +55,11 @@
 		}
 
 		#stats {
-			right: var(--padding);
+			right: 20px;
+		}
+
+		#controls {
+			left: 20px;
 		}
 	</style>
 </head>
@@ -67,6 +69,28 @@
 		<div id="stats">
 			FPS: <span id="fps"></span> - <span id="ms"></span>
 		</div>
+
+		<div id="controls">
+			<div>
+				Click & Drag to move camera
+			</div>
+			<div>
+				Scroll to zoom
+			</div>
+			<div>
+				LookAt Matrix: <input type="range" min=0 max=1 step=0.01 value=0 id="interpolateLookAt" autocomplete="off">
+			</div>
+			<div>
+				Projection Matrix: <input type="range" min=0 max=1 step=0.01 value=0 id="interpolateProjection" autocomplete="off" disabled="yes">
+				<div style="margin-left: 20px;">Invert Z-Axis: <input type="checkbox" id="invertZAxis" checked autocomplete="off"></div>
+			</div>
+			<div>
+				Use virtual camera: <input type="checkbox" id="displayMatricesVirtually" checked autocomplete="off">
+			</div>
+			<div>
+				Backface Culling: <input type="checkbox" id="backfaceCulling" autocomplete="off">
+			</div>
+		</div>
 	</div>
 </body>
 </html>

src/matrix-math.js

@@ -369,18 +369,6 @@ function mat4Inverse(out, m) {
 	return;
 }
 
-function mat4vec4Multiply(out, inMat, inVec) {
-	let result = [0, 0, 0, 0];
-	for (let i = 0; i < 4; i++) {
-		for (let j = 0; j < 4; j++) {
-			result[i] += inMat[i + j * 4] * inVec[j];
-		}
-	}
-	out[0] = result[0];
-	out[1] = result[1];
-	out[2] = result[2];
-	out[3] = result[3];
-}
 
 /**
  * subtracts b from a, storing the result in out
@@ -519,12 +507,4 @@ function mat3Inverse(out, inm) {
 	mat3Adjoint(result, inm);
 	mat3MultiplyScalar(result, result, 1 / mat3Determinant(inm));
 	mat3Copy(result, out);
-}
-
-function mat3MakeNormal(out, inm) {
-	let result = [];
-	mat3From4(result, inm);
-	mat3Inverse(result, result);
-	mat3Transpose(result, result);
-	mat3Copy(result, out);
 }

src/obj/cube.obj

@@ -1,34 +0,0 @@
-# Blender 4.4.3
-# www.blender.org
-o Cube
-v 1.000000 1.000000 -1.000000
-v 1.000000 -1.000000 -1.000000
-v 1.000000 1.000000 1.000000
-v 1.000000 -1.000000 1.000000
-v -1.000000 1.000000 -1.000000
-v -1.000000 -1.000000 -1.000000
-v -1.000000 1.000000 1.000000
-v -1.000000 -1.000000 1.000000
-vn -0.0000 1.0000 -0.0000
-vn -0.0000 -0.0000 1.0000
-vn -1.0000 -0.0000 -0.0000
-vn -0.0000 -1.0000 -0.0000
-vn 1.0000 -0.0000 -0.0000
-vn -0.0000 -0.0000 -1.0000
-vt 1.000000 0.000000
-vt 0.000000 1.000000
-vt 0.000000 0.000000
-vt 1.000000 1.000000
-s 0
-f 5/1/1 3/2/1 1/3/1
-f 3/1/2 8/2/2 4/3/2
-f 7/1/3 6/2/3 8/3/3
-f 2/1/4 8/2/4 6/3/4
-f 1/1/5 4/2/5 2/3/5
-f 5/1/6 2/2/6 6/3/6
-f 5/1/1 7/4/1 3/2/1
-f 3/1/2 7/4/2 8/2/2
-f 7/1/3 5/4/3 6/2/3
-f 2/1/4 4/4/4 8/2/4
-f 1/1/5 3/4/5 4/2/5
-f 5/1/6 1/4/6 2/2/6

src/script.js

@@ -3,16 +3,36 @@
 let cv, gl;
 
 let program;
+let floorProgram;
 
-class Object {
-	vertexBuffer;
-	numVertices;
-}
+let hVertices;
+let hVertexBuffer;
 
-let o = new Object();
+let cubeVertices;
+let cubeVertexBuffer;
+
+let lineCubeVertices;
+let lineCubeVertexBuffer;
+
+let originVertices;
+let originVertexBuffer;
+
+let floorVertices;
+let floorVertexBuffer;
+
+let cameraVertices;
+let cameraVertexBuffer;
 
 let lastFrame = Date.now();
 
+let interpolateProjection = 0;
+let interpolateLookAt = 0;
+
+let displayMatricesVirtually = true;
+let virtualRealInterpolation = 1;
+
+let invertZAxis = true;
+
 let cameraPitch = 0.565;
 let cameraYaw = 0.375;
 let cameraDistance = 4;
@@ -44,6 +64,43 @@ async function init() {
 
 
 	// input handling
+	document.getElementById("interpolateProjection").addEventListener("input", (e) => {
+		interpolateProjection = e.target.value;
+		if (interpolateProjection <= 0) {
+			document.getElementById("interpolateLookAt").disabled = "";
+		} else {
+			document.getElementById("interpolateLookAt").disabled = "yes";
+		}
+	});
+	document.getElementById("invertZAxis").addEventListener("input", (e) => {
+		invertZAxis = e.target.checked;
+	});
+	document.getElementById("interpolateLookAt").addEventListener("input", (e) => {
+		interpolateLookAt = e.target.value;
+		if (interpolateLookAt >= 1) {
+			document.getElementById("interpolateProjection").disabled = "";
+		} else {
+			document.getElementById("interpolateProjection").disabled = "yes";
+		}
+	});
+	document.getElementById("displayMatricesVirtually").addEventListener("input", (e) => {
+		displayMatricesVirtually = e.target.checked;
+		if (!displayMatricesVirtually) {
+			document.getElementById("invertZAxis").checked = true;
+			document.getElementById("invertZAxis").disabled = true;
+		} else {
+			document.getElementById("invertZAxis").checked = invertZAxis;
+			document.getElementById("invertZAxis").disabled = false;
+		}
+	});
+	document.getElementById("backfaceCulling").addEventListener("input", (e) => {
+		if (e.target.checked) {
+			gl.enable(gl.CULL_FACE);
+		} else {
+			gl.disable(gl.CULL_FACE);
+		}
+	});
+
 	cv.addEventListener("mousedown", (e) => {
 		if (e.button == 0) {
 			mouseDragging = true;
@@ -59,7 +116,7 @@ async function init() {
 	});
 
 	document.addEventListener("mousemove", (e) => {
-		if (mouseDragging) {
+		if (mouseDragging && displayMatricesVirtually) {
 			cameraYaw += e.movementX / 100;
 			cameraPitch += e.movementY / 100;
 
@@ -73,49 +130,303 @@ async function init() {
 		if (cameraDistance > 15) cameraDistance = 15;
 		e.preventDefault();
 	});
+
+
 	// end input handling
 
 	console.log("compiling shaders...");
 	program = await buildShaderProgram(gl, "shaders/vertex.glsl", "shaders/fragment.glsl");
+	floorProgram = await buildShaderProgram(gl, "shaders/floor-vertex.glsl", "shaders/floor-fragment.glsl");
 
 	console.log("creating vertex buffer");
 
+	hVertices = [
+		// X  // Y
 
-	let f = await readObjFile("obj/smooth_monkey.obj");
-	o = new Object();
+		// left vertical bar
+		-0.35, 0.6, 0.0, 1.0, 0.3, 0.3,
+		-0.35, -0.6, 0.0, 1.0, 0.3, 0.3,
+		-0.2, 0.6, 0.0, 1.0, 0.3, 0.3,
 
-	o.vertexBuffer = gl.createBuffer();
-	o.numVertices = f.length / 8;
-	gl.bindBuffer(gl.ARRAY_BUFFER, o.vertexBuffer);
-	gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(f), gl.STATIC_DRAW);
+		-0.2, 0.6, 0.0, 1.0, 0.3, 0.3,
+		-0.35, -0.6, 0.0, 1.0, 0.3, 0.3,
+		-0.2, -0.6, 0.0, 1.0, 0.3, 0.3,
+
+		// right vertical bar
+		0.35, -0.6, 0.0, 1.0, 0.3, 0.3,
+		0.35, 0.6, 0.0, 1.0, 0.3, 0.3,
+		0.2, 0.6, 0.0, 1.0, 0.3, 0.3,
+
+		0.35, -0.6, 0.0, 1.0, 0.3, 0.3,
+		0.2, 0.6, 0.0, 1.0, 0.3, 0.3,
+		0.2, -0.6, 0.0, 1.0, 0.3, 0.3,
+
+		// middle bar
+		-0.2, 0.1, 0.0, 1.0, 0.3, 0.3,
+		-0.2, -0.1, 0.0, 1.0, 0.3, 0.3,
+		0.2, 0.1, 0.0, 1.0, 0.3, 0.3,
+
+		0.2, 0.1, 0.0, 1.0, 0.3, 0.3,
+		-0.2, -0.1, 0.0, 1.0, 0.3, 0.3,
+		0.2, -0.1, 0.0, 1.0, 0.3, 0.3,
+
+		// bottom bar
+		-0.35, -0.7, 0.0, 1.0, 0.3, 0.3,
+		-0.35, -0.9, 0.0, 1.0, 0.3, 0.3,
+		0.35, -0.9, 0.0, 1.0, 0.3, 0.3,
+
+		-0.35, -0.7, 0.0, 1.0, 0.3, 0.3,
+		0.35, -0.9, 0.0, 1.0, 0.3, 0.3,
+		0.35, -0.7, 0.0, 1.0, 0.3, 0.3,
+	];
+
+	cubeVertices = [
+	    // Back face (red)
+	    -1, -1, -1, 1, 0.5, 0.5,
+	    -1,  1, -1, 1, 0.5, 0.5,
+	     1,  1, -1, 1, 0.5, 0.5,
+	    -1, -1, -1, 1, 0.5, 0.5,
+	     1,  1, -1, 1, 0.5, 0.5,
+	     1, -1, -1, 1, 0.5, 0.5,
+
+	    // Front face (green)
+	    -1, -1,  1, 0.5, 1, 0.5,
+	     1, -1,  1, 0.5, 1, 0.5,
+	     1,  1,  1, 0.5, 1, 0.5,
+	    -1, -1,  1, 0.5, 1, 0.5,
+	     1,  1,  1, 0.5, 1, 0.5,
+	    -1,  1,  1, 0.5, 1, 0.5,
+
+	    // Left face (blue)
+	    -1,  1, -1, 0.5, 0.5, 1,
+	    -1, -1, -1, 0.5, 0.5, 1,
+	    -1,  1,  1, 0.5, 0.5, 1,
+	    -1,  1,  1, 0.5, 0.5, 1,
+	    -1, -1, -1, 0.5, 0.5, 1,
+	    -1, -1,  1, 0.5, 0.5, 1,
+
+	    // Right face (yellow)
+	     1, -1, -1, 1, 1, 0.5,
+	     1,  1, -1, 1, 1, 0.5,
+	     1,  1,  1, 1, 1, 0.5,
+	     1, -1, -1, 1, 1, 0.5,
+	     1,  1,  1, 1, 1, 0.5,
+	     1, -1,  1, 1, 1, 0.5,
+
+	    // Top face (magenta)
+	    -1,  1, -1, 1, 0.5, 1,
+	    -1,  1,  1, 1, 0.5, 1,
+	     1,  1,  1, 1, 0.5, 1,
+	    -1,  1, -1, 1, 0.5, 1,
+	     1,  1,  1, 1, 0.5, 1,
+	     1,  1, -1, 1, 0.5, 1,
+
+	    // Bottom face (cyan)
+	    -1, -1,  1, 0.5, 1, 1,
+	    -1, -1, -1, 0.5, 1, 1,
+	     1, -1,  1, 0.5, 1, 1,
+	     1, -1,  1, 0.5, 1, 1,
+	    -1, -1, -1, 0.5, 1, 1,
+	     1, -1, -1, 0.5, 1, 1
+	];
+
+	lineCubeVertices = [
+		 1,  1,  1, 1, 0, 0,
+		 1,  1, -1, 1, 0, 0,
+		 1,  1,  1, 1, 0, 0,
+		 1, -1,  1, 1, 0, 0,
+		 1,  1,  1, 1, 0, 0,
+		-1,  1,  1, 1, 0, 0,
+		 1,  1, -1, 1, 0, 0,
+		 1, -1, -1, 1, 0, 0,
+		 1,  1, -1, 1, 0, 0,
+		-1,  1, -1, 1, 0, 0,
+		 1, -1,  1, 1, 0, 0,
+		 1, -1, -1, 1, 0, 0,
+		 1, -1,  1, 1, 0, 0,
+		-1, -1,  1, 1, 0, 0,
+		-1,  1,  1, 1, 0, 0,
+		-1,  1, -1, 1, 0, 0,
+		-1,  1,  1, 1, 0, 0,
+		-1, -1,  1, 1, 0, 0,
+		 1, -1, -1, 1, 0, 0,
+		-1, -1, -1, 1, 0, 0,
+		-1, -1,  1, 1, 0, 0,
+		-1, -1, -1, 1, 0, 0,
+		-1,  1, -1, 1, 0, 0,
+		-1, -1, -1, 1, 0, 0,
+	];
+
+	originVertices = [
+		0, 0, 0, 1, 0, 0,
+		1, 0, 0, 1, 0, 0,
+		0, 0, 0, 0, 1, 0,
+		0, 1, 0, 0, 1, 0,
+		0, 0, 0, 0, 0, 1,
+		0, 0, 1, 0, 0, 1,
+	];
+
+	floorVertices = [
+		 1, 0,  1, 0, 0, 0,
+		-1, 0, -1, 0, 0, 0,
+		-1, 0,  1, 0, 0, 0,
+		-1, 0, -1, 0, 0, 0,
+		 1, 0,  1, 0, 0, 0,
+		 1, 0, -1, 0, 0, 0,
+	];
+
+	cameraVertices = [
+		 // Cube Body (dark gray)
+	    // Front face
+	    -1, -1,  1, 0.196, 0.196, 0.196,
+	     1, -1,  1, 0.196, 0.196, 0.196,
+	     1,  1,  1, 0.196, 0.196, 0.196,
+	    -1, -1,  1, 0.196, 0.196, 0.196,
+	     1,  1,  1, 0.196, 0.196, 0.196,
+	    -1,  1,  1, 0.196, 0.196, 0.196,
+
+	    // Back face
+	    -1, -1, -1, 0.196, 0.196, 0.196,
+	     1,  1, -1, 0.196, 0.196, 0.196,
+	     1, -1, -1, 0.196, 0.196, 0.196,
+	    -1, -1, -1, 0.196, 0.196, 0.196,
+	    -1,  1, -1, 0.196, 0.196, 0.196,
+	     1,  1, -1, 0.196, 0.196, 0.196,
+
+	    // Left face
+	    -1, -1, -1, 0.196, 0.196, 0.196,
+	    -1, -1,  1, 0.196, 0.196, 0.196,
+	    -1,  1,  1, 0.196, 0.196, 0.196,
+	    -1, -1, -1, 0.196, 0.196, 0.196,
+	    -1,  1,  1, 0.196, 0.196, 0.196,
+	    -1,  1, -1, 0.196, 0.196, 0.196,
+
+	    // Right face
+	     1, -1, -1, 0.196, 0.196, 0.196,
+	     1,  1,  1, 0.196, 0.196, 0.196,
+	     1, -1,  1, 0.196, 0.196, 0.196,
+	     1, -1, -1, 0.196, 0.196, 0.196,
+	     1,  1, -1, 0.196, 0.196, 0.196,
+	     1,  1,  1, 0.196, 0.196, 0.196,
+
+	    // Top face
+	    -1,  1, -1, 0.196, 0.196, 0.196,
+	    -1,  1,  1, 0.196, 0.196, 0.196,
+	     1,  1,  1, 0.196, 0.196, 0.196,
+	    -1,  1, -1, 0.196, 0.196, 0.196,
+	     1,  1,  1, 0.196, 0.196, 0.196,
+	     1,  1, -1, 0.196, 0.196, 0.196,
+
+	    // Bottom face
+	    -1, -1, -1, 0.196, 0.196, 0.196,
+	     1, -1,  1, 0.196, 0.196, 0.196,
+	    -1, -1,  1, 0.196, 0.196, 0.196,
+	    -1, -1, -1, 0.196, 0.196, 0.196,
+	     1, -1, -1, 0.196, 0.196, 0.196,
+	     1, -1,  1, 0.196, 0.196, 0.196,
+
+	    // Lens (light gray)
+	    // Front face
+	    -0.5, -0.5, -1.6, 0.706, 0.706, 0.706,
+	     0.5,  0.5, -1.6, 0.706, 0.706, 0.706,
+	     0.5, -0.5, -1.6, 0.706, 0.706, 0.706,
+	    -0.5, -0.5, -1.6, 0.706, 0.706, 0.706,
+	    -0.5,  0.5, -1.6, 0.706, 0.706, 0.706,
+	     0.5,  0.5, -1.6, 0.706, 0.706, 0.706,
+
+	    // Back face
+	    -0.5, -0.5, -1.0, 0.706, 0.706, 0.706,
+	     0.5, -0.5, -1.0, 0.706, 0.706, 0.706,
+	     0.5,  0.5, -1.0, 0.706, 0.706, 0.706,
+	    -0.5, -0.5, -1.0, 0.706, 0.706, 0.706,
+	     0.5,  0.5, -1.0, 0.706, 0.706, 0.706,
+	    -0.5,  0.5, -1.0, 0.706, 0.706, 0.706,
+
+	    // Left face
+	    -0.5,  0.5, -1.6, 0.706, 0.706, 0.706,
+	    -0.5, -0.5, -1.0, 0.706, 0.706, 0.706,
+	    -0.5,  0.5, -1.0, 0.706, 0.706, 0.706,
+	    -0.5, -0.5, -1.6, 0.706, 0.706, 0.706,
+	    -0.5, -0.5, -1.0, 0.706, 0.706, 0.706,
+	    -0.5,  0.5, -1.6, 0.706, 0.706, 0.706,
+
+	    // Right face
+	     0.5,  0.5, -1.0, 0.706, 0.706, 0.706,
+	     0.5, -0.5, -1.0, 0.706, 0.706, 0.706,
+	     0.5,  0.5, -1.6, 0.706, 0.706, 0.706,
+	     0.5,  0.5, -1.6, 0.706, 0.706, 0.706,
+	     0.5, -0.5, -1.0, 0.706, 0.706, 0.706,
+	     0.5, -0.5, -1.6, 0.706, 0.706, 0.706,
+
+	    // Top face
+	     0.5,  0.5, -1.6, 0.706, 0.706, 0.706,
+	    -0.5,  0.5, -1.0, 0.706, 0.706, 0.706,
+	     0.5,  0.5, -1.0, 0.706, 0.706, 0.706,
+	    -0.5,  0.5, -1.6, 0.706, 0.706, 0.706,
+	    -0.5,  0.5, -1.0, 0.706, 0.706, 0.706,
+	     0.5,  0.5, -1.6, 0.706, 0.706, 0.706,
+
+	    // Bottom face
+	    -0.5, -0.5, -1.0, 0.706, 0.706, 0.706,
+	     0.5, -0.5, -1.0, 0.706, 0.706, 0.706,
+	     0.5, -0.5, -1.6, 0.706, 0.706, 0.706,
+	    -0.5, -0.5, -1.0, 0.706, 0.706, 0.706,
+	     0.5, -0.5, -1.6, 0.706, 0.706, 0.706,
+	    -0.5, -0.5, -1.6, 0.706, 0.706, 0.706
+	];
+
+	hVertexBuffer = gl.createBuffer();
+	gl.bindBuffer(gl.ARRAY_BUFFER, hVertexBuffer);
+	gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(hVertices), gl.STATIC_DRAW);
+
+	cubeVertexBuffer = gl.createBuffer();
+	gl.bindBuffer(gl.ARRAY_BUFFER, cubeVertexBuffer);
+	gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(cubeVertices), gl.STATIC_DRAW);
+
+	lineCubeVertexBuffer = gl.createBuffer();
+	gl.bindBuffer(gl.ARRAY_BUFFER, lineCubeVertexBuffer);
+	gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(lineCubeVertices), gl.STATIC_DRAW);
+
+	originVertexBuffer = gl.createBuffer();
+	gl.bindBuffer(gl.ARRAY_BUFFER, originVertexBuffer);
+	gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(originVertices), gl.STATIC_DRAW);
+
+	floorVertexBuffer = gl.createBuffer();
+	gl.bindBuffer(gl.ARRAY_BUFFER, floorVertexBuffer);
+	gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(floorVertices), gl.STATIC_DRAW);
+
+	cameraVertexBuffer = gl.createBuffer();
+	gl.bindBuffer(gl.ARRAY_BUFFER, cameraVertexBuffer);
+	gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(cameraVertices), gl.STATIC_DRAW);
+
+	// unbind buffer
 	gl.bindBuffer(gl.ARRAY_BUFFER, null);
 
-
 	// set clear colour
 	gl.clearColor(...hexToRgb("181825"), 1.0);
 
 	gl.enable(gl.DEPTH_TEST);
 	gl.enable(gl.BLEND);
-	gl.enable(gl.CULL_FACE);
-	gl.frontFace(gl.CCW);
 	gl.blendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA);
 
+	gl.enable( gl.LINE_SMOOTH );
+	gl.enable( gl.POLYGON_SMOOTH );
+	gl.hint( gl.LINE_SMOOTH_HINT, gl.NICEST );
+	gl.hint( gl.POLYGON_SMOOTH_HINT, gl.NICEST )
+
 	// start drawing
 	requestAnimationFrame(draw);
 }
 
 function setAttribPointers() {
 	let positionAttribLocation = gl.getAttribLocation(program, "vertPosition");
-	let normalAttribLocation = gl.getAttribLocation(program, "vertNormal");
-	let textureAttribLocation = gl.getAttribLocation(program, "vertTexture");
+	let colorAttribLocation = gl.getAttribLocation(program, "vertColor");
 
-	gl.vertexAttribPointer(positionAttribLocation, 3, gl.FLOAT, gl.FALSE, 8 * Float32Array.BYTES_PER_ELEMENT, 0);
-	gl.vertexAttribPointer(textureAttribLocation, 2, gl.FLOAT, gl.FALSE, 8 * Float32Array.BYTES_PER_ELEMENT, 3 * Float32Array.BYTES_PER_ELEMENT);
-	gl.vertexAttribPointer(normalAttribLocation, 3, gl.FLOAT, gl.FALSE, 8 * Float32Array.BYTES_PER_ELEMENT, 5 * Float32Array.BYTES_PER_ELEMENT);
+	gl.vertexAttribPointer(positionAttribLocation, 3, gl.FLOAT, gl.FALSE, 6 * Float32Array.BYTES_PER_ELEMENT, 0);
+	gl.vertexAttribPointer(colorAttribLocation, 3, gl.FLOAT, gl.FALSE, 6 * Float32Array.BYTES_PER_ELEMENT, 3 * Float32Array.BYTES_PER_ELEMENT);
 
 	gl.enableVertexAttribArray(positionAttribLocation);
-	gl.enableVertexAttribArray(textureAttribLocation);
-	gl.enableVertexAttribArray(normalAttribLocation);
+	gl.enableVertexAttribArray(colorAttribLocation);
 }
 
 let frameCount = 0;
@@ -153,48 +464,193 @@ async function draw() {
 	hue += deltaTime / 5;
 	if (hue > 1) hue = 0;
 
+	if (displayMatricesVirtually) {
+		virtualRealInterpolation = Math.min(virtualRealInterpolation + deltaTime * 2, 1);
+	} else {
+		virtualRealInterpolation = Math.max(virtualRealInterpolation - deltaTime * 2, 0);
+	}
+
 	smoothCameraDistance += (cameraDistance - smoothCameraDistance) / 8;
 
 	updateStats(deltaTime);
 
 	gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
 
+	
+
 	let identity = [];
 	mat4Identity(identity);
 
 	// Real Matrices
-	let projectionMatrix = [];
-	mat4BuildPerspective(projectionMatrix, 90.0 / 180.0 * Math.PI, cv.width / cv.height, 0.1, 30);
+	let realProjectionMatrix = [];
+	mat4BuildPerspective(realProjectionMatrix, 90.0 / 180.0 * Math.PI, cv.width / cv.height, 0.1, 30);
 
-	let viewMatrix = [];
-	let cameraPosition = [Math.cos(cameraYaw) * smoothCameraDistance * Math.cos(cameraPitch), Math.sin(cameraPitch) * smoothCameraDistance, Math.sin(cameraYaw) * smoothCameraDistance * Math.cos(cameraPitch)];
-	let cameraLookAt = [0, 0, 0];
-	let cameraUp = [0, 1, 0];
-	mat4BuildLookAt(viewMatrix, cameraPosition, cameraLookAt, cameraUp);
+	let realViewMatrix = [];
+	let realCameraPosition = [Math.cos(cameraYaw) * smoothCameraDistance * Math.cos(cameraPitch), Math.sin(cameraPitch) * smoothCameraDistance, Math.sin(cameraYaw) * smoothCameraDistance * Math.cos(cameraPitch)];
+	let realCameraLookAt = [0, 0, 0];
+	let realCameraUp = [0, 1, 0];
+	mat4BuildLookAt(realViewMatrix, realCameraPosition, realCameraLookAt, realCameraUp);
 
-	let normalMatrix = [];
-	mat3MakeNormal(normalMatrix, viewMatrix);
+	mat4Interpolate(realProjectionMatrix, identity, realProjectionMatrix, virtualRealInterpolation * virtualRealInterpolation);
+	mat4Interpolate(realViewMatrix, identity, realViewMatrix, virtualRealInterpolation);
 
 	gl.useProgram(program);
-	gl.uniformMatrix4fv(gl.getUniformLocation(program, "projectionMatrix"), gl.FALSE, new Float32Array(projectionMatrix));
-	gl.uniformMatrix4fv(gl.getUniformLocation(program, "modelViewMatrix"), gl.FALSE, new Float32Array(viewMatrix));
-	gl.uniformMatrix3fv(gl.getUniformLocation(program, "normalMatrix"), gl.FALSE, new Float32Array(normalMatrix));
+	gl.uniformMatrix4fv(gl.getUniformLocation(program, "realProjectionMatrix"), gl.FALSE, new Float32Array(realProjectionMatrix));
+	gl.uniformMatrix4fv(gl.getUniformLocation(program, "realViewMatrix"), gl.FALSE, new Float32Array(realViewMatrix));
 
-	let lightPosition = [Math.cos(hue * Math.PI * 2) * 3, 2.0, Math.sin(hue * Math.PI * 2) * 3, 1.0];
-	mat4vec4Multiply(lightPosition, viewMatrix, lightPosition);
+	gl.useProgram(floorProgram);
+	gl.uniformMatrix4fv(gl.getUniformLocation(floorProgram, "realProjectionMatrix"), gl.FALSE, new Float32Array(realProjectionMatrix));
 
-	gl.uniform3f(gl.getUniformLocation(program, "Light.position"), ...lightPosition.slice(0, 3));
-	gl.uniform3f(gl.getUniformLocation(program, "Light.color"), 1, 1, 1);
+	// Virtual Matrices
+	gl.useProgram(program);
+	let virtualModelViewLocation = gl.getUniformLocation(program, "virtualModelViewMatrix");
+	let virtualProjectionLocation = gl.getUniformLocation(program, "virtualProjectionMatrix");
+	let colorOverrideLocation = gl.getUniformLocation(program, "colorOverride");
 
-	gl.uniform3f(gl.getUniformLocation(program, "Material.ambientColor"), 0.1, 0.1, 0.1);
-	gl.uniform3f(gl.getUniformLocation(program, "Material.emitColor"), 0.05, 0.05, 0.0);
-	gl.uniform3f(gl.getUniformLocation(program, "Material.diffColor"), 0.7, 0.8, 0.1);
-	gl.uniform3f(gl.getUniformLocation(program, "Material.specColor"), 1, 1, 0.8);
-	gl.uniform1f(gl.getUniformLocation(program, "Material.shininess"), 10);
 
-	gl.bindBuffer(gl.ARRAY_BUFFER, o.vertexBuffer);
+	let virtualProjectionMatrix = [];
+	mat4BuildPerspective(virtualProjectionMatrix, 90.0 / 180.0 * Math.PI, cv.width / cv.height, 0.9, 5);
+
+	if (!invertZAxis) {
+		let zAxisFlipMatrix = [];
+		mat4Identity(zAxisFlipMatrix);
+		zAxisFlipMatrix[10] = -1;
+		mat4Interpolate(zAxisFlipMatrix, identity, zAxisFlipMatrix, virtualRealInterpolation);
+		mat4Multiply(virtualProjectionMatrix, zAxisFlipMatrix, virtualProjectionMatrix);
+	}
+
+	let inverseVirtualProjectionMatrix = [];
+	mat4Inverse(inverseVirtualProjectionMatrix, virtualProjectionMatrix);
+
+	let virtualViewMatrix = [];
+	let virtualCameraPosition = [1.2, 1.2, 2];
+	let virtualCameraLookAt = [0, 0, -1];
+	let virtualCameraUp = [0, 1, 0];
+	mat4BuildLookAt(virtualViewMatrix, virtualCameraPosition, virtualCameraLookAt, virtualCameraUp);
+
+	let inverseVirtualViewMatrix = [];
+	mat4Inverse(inverseVirtualViewMatrix, virtualViewMatrix);
+
+	mat4Interpolate(virtualProjectionMatrix, identity, virtualProjectionMatrix, interpolateProjection);
+	mat4Interpolate(virtualViewMatrix, identity, virtualViewMatrix, interpolateLookAt);
+
+	gl.uniformMatrix4fv(virtualProjectionLocation, gl.FALSE, new Float32Array(virtualProjectionMatrix));
+
+
+	let modelMatrix = [];
+	mat4Identity(modelMatrix);
+
+	let modelViewMatrix = [];
+	mat4Multiply(modelViewMatrix, virtualViewMatrix, modelMatrix);
+
+	gl.uniformMatrix4fv(virtualModelViewLocation, gl.FALSE, new Float32Array(modelViewMatrix));
+
+	
+	// draw scene
+
+	// draw H
+	gl.useProgram(program);
+	gl.bindBuffer(gl.ARRAY_BUFFER, hVertexBuffer);
 	setAttribPointers();
-	gl.drawArrays(gl.TRIANGLES, 0, o.numVertices);
+	gl.drawArrays(gl.TRIANGLES, 0, hVertices.length / 6);	
+
+	// draw line cube
+	gl.bindBuffer(gl.ARRAY_BUFFER, lineCubeVertexBuffer);
+	setAttribPointers();
+	gl.uniform3fv(colorOverrideLocation, [1, 1, 0.5]);
+	gl.drawArrays(gl.LINES, 0, lineCubeVertices.length / 6);
+	gl.uniform3fv(colorOverrideLocation, [0, 0, 0]);
+
+	// draw solid cube 1
+	let cube1ModelView = [];
+	mat4Identity(cube1ModelView);
+	mat4Scale(cube1ModelView, cube1ModelView, [0.3, 0.3, 0.3]);
+	mat4RotateY(cube1ModelView, cube1ModelView, 0.3);
+	mat4Translate(cube1ModelView, cube1ModelView, [-0.5, 0.3, -0.7]);
+	mat4Multiply(cube1ModelView, virtualViewMatrix, cube1ModelView);
+
+	gl.uniformMatrix4fv(virtualModelViewLocation, gl.FALSE, new Float32Array(cube1ModelView));
+	gl.bindBuffer(gl.ARRAY_BUFFER, cubeVertexBuffer);
+	setAttribPointers();
+	gl.drawArrays(gl.TRIANGLES, 0, cubeVertices.length / 6);
+
+	// draw solid cube 2
+	let cube2ModelView = [];
+	mat4Identity(cube2ModelView);
+	mat4Scale(cube2ModelView, cube2ModelView, [0.4, 0.4, 0.4]);
+	mat4RotateY(cube2ModelView, cube2ModelView, 2.6);
+	mat4Translate(cube2ModelView, cube2ModelView, [1.6, 0.3, -1]);
+	mat4Multiply(cube2ModelView, virtualViewMatrix, cube2ModelView);
+
+	gl.uniformMatrix4fv(virtualModelViewLocation, gl.FALSE, new Float32Array(cube2ModelView));
+	gl.bindBuffer(gl.ARRAY_BUFFER, cubeVertexBuffer);
+	setAttribPointers();
+	gl.drawArrays(gl.TRIANGLES, 0, cubeVertices.length / 6);
+
+	// draw virtual camera
+	let virtualCameraModelView = [];
+	mat4Identity(virtualCameraModelView);
+	mat4Scale(virtualCameraModelView, virtualCameraModelView, [0.1, 0.1, 0.1]);
+	mat4Translate(virtualCameraModelView, virtualCameraModelView, [0, 0, 0.16]);
+
+	mat4Multiply(virtualCameraModelView, inverseVirtualViewMatrix, virtualCameraModelView);
+	mat4Multiply(virtualCameraModelView, virtualViewMatrix, virtualCameraModelView);
+	
+	gl.uniformMatrix4fv(virtualModelViewLocation, gl.FALSE, new Float32Array(virtualCameraModelView));
+
+	gl.bindBuffer(gl.ARRAY_BUFFER, cameraVertexBuffer);
+	setAttribPointers();
+	if (displayMatricesVirtually && interpolateProjection <= 0) {
+		gl.drawArrays(gl.TRIANGLES, 0, cameraVertices.length / 6);
+	}
+
+	let frustomModelMatrix = [];
+	mat4Multiply(frustomModelMatrix, inverseVirtualViewMatrix, inverseVirtualProjectionMatrix);
+	mat4Multiply(frustomModelMatrix, virtualViewMatrix, frustomModelMatrix);
+	// mat4Copy(inverseVirtualProjectionMatrix, frustomModelMatrix);
+
+	gl.uniformMatrix4fv(virtualModelViewLocation, gl.FALSE, new Float32Array(frustomModelMatrix));
+	gl.bindBuffer(gl.ARRAY_BUFFER, lineCubeVertexBuffer);
+	setAttribPointers();
+	gl.uniform3fv(colorOverrideLocation, [1, 0, 1]);
+	gl.drawArrays(gl.LINES, 0, lineCubeVertices.length / 6);
+	gl.uniform3fv(colorOverrideLocation, [0, 0, 0]);
+
+
+
+	// draw origin
+
+	gl.uniformMatrix4fv(virtualModelViewLocation, gl.FALSE, new Float32Array(identity));
+	gl.uniformMatrix4fv(virtualProjectionLocation, gl.FALSE, new Float32Array(identity));
+	
+	gl.bindBuffer(gl.ARRAY_BUFFER, originVertexBuffer);
+	setAttribPointers();
+	gl.drawArrays(gl.LINES, 0, originVertices.length / 6);
+
+	// draw origin cube
+
+	if (interpolateProjection < 1 && interpolateLookAt > 0) {
+		gl.bindBuffer(gl.ARRAY_BUFFER, lineCubeVertexBuffer);
+		setAttribPointers();
+		gl.uniform3fv(colorOverrideLocation, [1, 0, 0]);
+		gl.drawArrays(gl.LINES, 0, lineCubeVertices.length / 6);
+		gl.uniform3fv(colorOverrideLocation, [0, 0, 0]);
+	}
+
+	// draw floor
+
+	gl.useProgram(floorProgram);
+
+	let floorModelView = [];
+	mat4Identity(floorModelView);
+	mat4Scale(floorModelView, floorModelView, [10, 0, 10]);
+	mat4Multiply(floorModelView, realViewMatrix, floorModelView);
+	gl.uniformMatrix4fv(gl.getUniformLocation(floorProgram, "realModelViewMatrix"), gl.FALSE, new Float32Array(floorModelView));
+
+	gl.bindBuffer(gl.ARRAY_BUFFER, floorVertexBuffer);
+	setAttribPointers();
+	gl.drawArrays(gl.TRIANGLES, 0, floorVertices.length / 6);
+
 
 	frameTimes.push(performance.now() - frameStart);
 	lastFrame = now;

src/shaders/floor-fragment.glsl

@@ -0,0 +1,6 @@
+precision mediump float;
+varying vec3 vPosition;
+
+void main() {
+	gl_FragColor = mix(vec4(1,1,1,0.5), vec4(0.8,0.8,0.8,0.5), step(0.0, sin(vPosition.x * 3.14159 * 20.0) * sin(vPosition.z * 3.14159 * 20.0)));
+}

src/shaders/floor-vertex.glsl

@@ -0,0 +1,14 @@
+precision mediump float;
+
+attribute vec3 vertPosition;
+attribute vec3 vertColor;
+
+uniform mat4 realModelViewMatrix;
+uniform mat4 realProjectionMatrix;
+
+varying vec3 vPosition;
+
+void main() {
+	vPosition = vertPosition;
+	gl_Position = realProjectionMatrix * realModelViewMatrix * vec4(vertPosition, 1.0);
+}

src/shaders/fragment.glsl

@@ -1,33 +1,6 @@
 precision mediump float;
-
-uniform struct {
-	vec3 position;
-	vec3 color;
-} Light;
-
-uniform struct {
-	vec3 ambientColor;
-	vec3 emitColor;
-	vec3 diffColor;
-	vec3 specColor;
-	float shininess;
-} Material;
-
-varying vec3 vNormal;
-varying vec2 vTexture;
-varying vec3 vPosition;
+varying vec3 fragColor;
 
 void main() {
-	vec3 pleaseDontDeleteMe = vec3(vTexture, 0.0);
-
-	vec3 eyeDir = normalize(-vPosition);
-	vec3 lightDir = normalize(Light.position - vPosition);
-	vec3 r = reflect(-lightDir, vNormal);
-
-	vec3 ambient = Material.ambientColor;
-	vec3 emit = Material.emitColor;
-	vec3 diff = max(dot(lightDir, vNormal), 0.0) * Material.diffColor * Light.color;
-	vec3 spec = pow(max(dot(r, eyeDir), 0.0), Material.shininess) * Material.specColor * Light.color;
-
-	gl_FragColor = vec4(ambient + emit + diff + spec, 1);
+	gl_FragColor = vec4(fragColor, 1.0);
 }

src/shaders/vertex.glsl

@@ -1,21 +1,21 @@
 precision mediump float;
 
 attribute vec3 vertPosition;
-attribute vec3 vertNormal;
-attribute vec2 vertTexture;
+attribute vec3 vertColor;
 
-uniform mat4 modelViewMatrix;
-uniform mat4 projectionMatrix;
-uniform mat3 normalMatrix;
+uniform mat4 virtualModelViewMatrix;
+uniform mat4 virtualProjectionMatrix;
 
-varying vec3 vNormal;
-varying vec2 vTexture;
-varying vec3 vPosition;
+uniform mat4 realViewMatrix;
+uniform mat4 realProjectionMatrix;
+
+uniform vec3 colorOverride;
+
+varying vec3 fragColor;
 
 void main() {
-	vNormal = normalize(normalMatrix * vertNormal);
-	vTexture = vertTexture;
-	vPosition = (modelViewMatrix * vec4(vertPosition, 1.0)).xyz;
+	float colorOverrideActive = step(0.001, length(colorOverride));
+	fragColor = colorOverride * colorOverrideActive + vertColor * (1.0 - colorOverrideActive);
 
-	gl_Position = projectionMatrix * modelViewMatrix * vec4(vertPosition, 1.0);
+	gl_Position = realProjectionMatrix * realViewMatrix * virtualProjectionMatrix * virtualModelViewMatrix * vec4(vertPosition, 1.0);
 }

src/wavefront.js

@@ -1,43 +0,0 @@
-async function readObjFile(path) {
-	const res = await fetch(path);
-	const text = await res.text();
-
-	let vertices = [];
-	let textures = [];
-	let normals = [];
-
-	let result = [];
-
-	const lines = text.replace("\r","").split("\n");
-
-	for (let line of lines) {
-		const parts = line.split(/\s+/);
-		
-		switch (parts[0]) {
-		case "v":
-			vertices.push(parts.slice(1, 4).map(parseFloat));
-			break;
-		case "vt":
-			textures.push(parts.slice(1, 3).map(parseFloat));
-			break;
-		case "vn":
-			normals.push(parts.slice(1, 4).map(parseFloat));
-			break;
-		case "f":
-			for (const part of parts.slice(1, 4)) {
-				const [v, vt, vn] = part.split("/").map((i) => parseInt(i) - 1);
-				result.push(...vertices[v], ...textures[vt], ...normals[vn]);
-			}
-			
-			// support for quads:
-			if (parts.length > 4) {
-				for (let i of [1, 3, 4]) {
-					const part = parts[i];
-					const [v, vt, vn] = part.split("/").map((i) => parseInt(i) - 1);
-					result.push(...vertices[v], ...textures[vt], ...normals[vn]);
-				}
-			}
-		}
-	}
-	return result;
-}