diff --git a/docs/example_wasm.js b/docs/example_wasm.js
index 5666d954..cbf33dc7 100644
--- a/docs/example_wasm.js
+++ b/docs/example_wasm.js
@@ -1,488 +1,16 @@
+let wasm_bindgen;
 (function() {
     const __exports = {};
     let wasm;
 
-    let cachedTextEncoder = new TextEncoder('utf-8');
-
-    let cachegetUint8Memory = null;
-    function getUint8Memory() {
-        if (cachegetUint8Memory === null || cachegetUint8Memory.buffer !== wasm.memory.buffer) {
-            cachegetUint8Memory = new Uint8Array(wasm.memory.buffer);
-        }
-        return cachegetUint8Memory;
-    }
-
-    let WASM_VECTOR_LEN = 0;
-
-    let passStringToWasm;
-    if (typeof cachedTextEncoder.encodeInto === 'function') {
-        passStringToWasm = function(arg) {
-
-            let size = arg.length;
-            let ptr = wasm.__wbindgen_malloc(size);
-            let writeOffset = 0;
-            while (true) {
-                const view = getUint8Memory().subarray(ptr + writeOffset, ptr + size);
-                const { read, written } = cachedTextEncoder.encodeInto(arg, view);
-                arg = arg.substring(read);
-                writeOffset += written;
-                if (arg.length === 0) {
-                    break;
-                }
-                ptr = wasm.__wbindgen_realloc(ptr, size, size * 2);
-                size *= 2;
-            }
-            WASM_VECTOR_LEN = writeOffset;
-            return ptr;
-        };
-    } else {
-        passStringToWasm = function(arg) {
-
-            const buf = cachedTextEncoder.encode(arg);
-            const ptr = wasm.__wbindgen_malloc(buf.length);
-            getUint8Memory().set(buf, ptr);
-            WASM_VECTOR_LEN = buf.length;
-            return ptr;
-        };
-    }
-    /**
-    * @param {string} arg0
-    * @param {number} arg1
-    * @returns {State}
-    */
-    __exports.new_webgl_gui = function(arg0, arg1) {
-        const ptr0 = passStringToWasm(arg0);
-        const len0 = WASM_VECTOR_LEN;
-        try {
-            return State.__wrap(wasm.new_webgl_gui(ptr0, len0, arg1));
-
-        } finally {
-            wasm.__wbindgen_free(ptr0, len0 * 1);
-
-        }
-
-    };
-
-    /**
-    * @param {State} arg0
-    * @param {string} arg1
-    * @returns {void}
-    */
-    __exports.run_gui = function(arg0, arg1) {
-        const ptr1 = passStringToWasm(arg1);
-        const len1 = WASM_VECTOR_LEN;
-        try {
-            return wasm.run_gui(arg0.ptr, ptr1, len1);
-
-        } finally {
-            wasm.__wbindgen_free(ptr1, len1 * 1);
-
-        }
-
-    };
-
-    const heap = new Array(32);
-
-    heap.fill(undefined);
+    const heap = new Array(32).fill(undefined);
 
     heap.push(undefined, null, true, false);
 
 function getObject(idx) { return heap[idx]; }
 
-let cachedTextDecoder = new TextDecoder('utf-8');
-
-function getStringFromWasm(ptr, len) {
-    return cachedTextDecoder.decode(getUint8Memory().subarray(ptr, ptr + len));
-}
-
 let heap_next = heap.length;
 
-function addHeapObject(obj) {
-    if (heap_next === heap.length) heap.push(heap.length + 1);
-    const idx = heap_next;
-    heap_next = heap[idx];
-
-    heap[idx] = obj;
-    return idx;
-}
-
-function isLikeNone(x) {
-    return x === undefined || x === null;
-}
-
-__exports.__widl_f_get_element_by_id_Document = function(arg0, arg1, arg2) {
-    let varg1 = getStringFromWasm(arg1, arg2);
-
-    const val = getObject(arg0).getElementById(varg1);
-    return isLikeNone(val) ? 0 : addHeapObject(val);
-
-};
-
-__exports.__widl_instanceof_HTMLCanvasElement = function(idx) { return getObject(idx) instanceof HTMLCanvasElement ? 1 : 0; };
-
-let cachegetUint32Memory = null;
-function getUint32Memory() {
-    if (cachegetUint32Memory === null || cachegetUint32Memory.buffer !== wasm.memory.buffer) {
-        cachegetUint32Memory = new Uint32Array(wasm.memory.buffer);
-    }
-    return cachegetUint32Memory;
-}
-
-function handleError(exnptr, e) {
-    const view = getUint32Memory();
-    view[exnptr / 4] = 1;
-    view[exnptr / 4 + 1] = addHeapObject(e);
-}
-
-__exports.__widl_f_get_context_HTMLCanvasElement = function(arg0, arg1, arg2, exnptr) {
-    let varg1 = getStringFromWasm(arg1, arg2);
-    try {
-
-        const val = getObject(arg0).getContext(varg1);
-        return isLikeNone(val) ? 0 : addHeapObject(val);
-
-    } catch (e) {
-        handleError(exnptr, e);
-    }
-};
-
-__exports.__widl_f_width_HTMLCanvasElement = function(arg0) {
-    return getObject(arg0).width;
-};
-
-__exports.__widl_f_height_HTMLCanvasElement = function(arg0) {
-    return getObject(arg0).height;
-};
-
-__exports.__widl_f_now_Performance = function(arg0) {
-    return getObject(arg0).now();
-};
-
-__exports.__widl_instanceof_WebGLRenderingContext = function(idx) { return getObject(idx) instanceof WebGLRenderingContext ? 1 : 0; };
-
-__exports.__widl_f_buffer_data_with_array_buffer_view_WebGLRenderingContext = function(arg0, arg1, arg2, arg3) {
-    getObject(arg0).bufferData(arg1, getObject(arg2), arg3);
-};
-
-function getArrayU8FromWasm(ptr, len) {
-    return getUint8Memory().subarray(ptr / 1, ptr / 1 + len);
-}
-
-__exports.__widl_f_tex_image_2d_with_i32_and_i32_and_i32_and_format_and_type_and_opt_u8_array_WebGLRenderingContext = function(arg0, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9, arg10, exnptr) {
-    let varg9 = arg9 == 0 ? undefined : getArrayU8FromWasm(arg9, arg10);
-    try {
-        getObject(arg0).texImage2D(arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, varg9);
-    } catch (e) {
-        handleError(exnptr, e);
-    }
-};
-
-__exports.__widl_f_active_texture_WebGLRenderingContext = function(arg0, arg1) {
-    getObject(arg0).activeTexture(arg1);
-};
-
-__exports.__widl_f_attach_shader_WebGLRenderingContext = function(arg0, arg1, arg2) {
-    getObject(arg0).attachShader(getObject(arg1), getObject(arg2));
-};
-
-__exports.__widl_f_bind_buffer_WebGLRenderingContext = function(arg0, arg1, arg2) {
-    getObject(arg0).bindBuffer(arg1, getObject(arg2));
-};
-
-__exports.__widl_f_bind_texture_WebGLRenderingContext = function(arg0, arg1, arg2) {
-    getObject(arg0).bindTexture(arg1, getObject(arg2));
-};
-
-__exports.__widl_f_blend_func_WebGLRenderingContext = function(arg0, arg1, arg2) {
-    getObject(arg0).blendFunc(arg1, arg2);
-};
-
-__exports.__widl_f_clear_WebGLRenderingContext = function(arg0, arg1) {
-    getObject(arg0).clear(arg1);
-};
-
-__exports.__widl_f_clear_color_WebGLRenderingContext = function(arg0, arg1, arg2, arg3, arg4) {
-    getObject(arg0).clearColor(arg1, arg2, arg3, arg4);
-};
-
-__exports.__widl_f_compile_shader_WebGLRenderingContext = function(arg0, arg1) {
-    getObject(arg0).compileShader(getObject(arg1));
-};
-
-__exports.__widl_f_create_buffer_WebGLRenderingContext = function(arg0) {
-
-    const val = getObject(arg0).createBuffer();
-    return isLikeNone(val) ? 0 : addHeapObject(val);
-
-};
-
-__exports.__widl_f_create_program_WebGLRenderingContext = function(arg0) {
-
-    const val = getObject(arg0).createProgram();
-    return isLikeNone(val) ? 0 : addHeapObject(val);
-
-};
-
-__exports.__widl_f_create_shader_WebGLRenderingContext = function(arg0, arg1) {
-
-    const val = getObject(arg0).createShader(arg1);
-    return isLikeNone(val) ? 0 : addHeapObject(val);
-
-};
-
-__exports.__widl_f_create_texture_WebGLRenderingContext = function(arg0) {
-
-    const val = getObject(arg0).createTexture();
-    return isLikeNone(val) ? 0 : addHeapObject(val);
-
-};
-
-__exports.__widl_f_draw_elements_with_i32_WebGLRenderingContext = function(arg0, arg1, arg2, arg3, arg4) {
-    getObject(arg0).drawElements(arg1, arg2, arg3, arg4);
-};
-
-__exports.__widl_f_enable_WebGLRenderingContext = function(arg0, arg1) {
-    getObject(arg0).enable(arg1);
-};
-
-__exports.__widl_f_enable_vertex_attrib_array_WebGLRenderingContext = function(arg0, arg1) {
-    getObject(arg0).enableVertexAttribArray(arg1);
-};
-
-__exports.__widl_f_get_attrib_location_WebGLRenderingContext = function(arg0, arg1, arg2, arg3) {
-    let varg2 = getStringFromWasm(arg2, arg3);
-    return getObject(arg0).getAttribLocation(getObject(arg1), varg2);
-};
-
-__exports.__widl_f_get_program_info_log_WebGLRenderingContext = function(ret, arg0, arg1) {
-    const val = getObject(arg0).getProgramInfoLog(getObject(arg1));
-    const retptr = isLikeNone(val) ? [0, 0] : passStringToWasm(val);
-    const retlen = WASM_VECTOR_LEN;
-    const mem = getUint32Memory();
-    mem[ret / 4] = retptr;
-    mem[ret / 4 + 1] = retlen;
-
-};
-
-__exports.__widl_f_get_program_parameter_WebGLRenderingContext = function(arg0, arg1, arg2) {
-    return addHeapObject(getObject(arg0).getProgramParameter(getObject(arg1), arg2));
-};
-
-__exports.__widl_f_get_shader_info_log_WebGLRenderingContext = function(ret, arg0, arg1) {
-    const val = getObject(arg0).getShaderInfoLog(getObject(arg1));
-    const retptr = isLikeNone(val) ? [0, 0] : passStringToWasm(val);
-    const retlen = WASM_VECTOR_LEN;
-    const mem = getUint32Memory();
-    mem[ret / 4] = retptr;
-    mem[ret / 4 + 1] = retlen;
-
-};
-
-__exports.__widl_f_get_shader_parameter_WebGLRenderingContext = function(arg0, arg1, arg2) {
-    return addHeapObject(getObject(arg0).getShaderParameter(getObject(arg1), arg2));
-};
-
-__exports.__widl_f_get_uniform_location_WebGLRenderingContext = function(arg0, arg1, arg2, arg3) {
-    let varg2 = getStringFromWasm(arg2, arg3);
-
-    const val = getObject(arg0).getUniformLocation(getObject(arg1), varg2);
-    return isLikeNone(val) ? 0 : addHeapObject(val);
-
-};
-
-__exports.__widl_f_link_program_WebGLRenderingContext = function(arg0, arg1) {
-    getObject(arg0).linkProgram(getObject(arg1));
-};
-
-__exports.__widl_f_shader_source_WebGLRenderingContext = function(arg0, arg1, arg2, arg3) {
-    let varg2 = getStringFromWasm(arg2, arg3);
-    getObject(arg0).shaderSource(getObject(arg1), varg2);
-};
-
-__exports.__widl_f_tex_parameteri_WebGLRenderingContext = function(arg0, arg1, arg2, arg3) {
-    getObject(arg0).texParameteri(arg1, arg2, arg3);
-};
-
-__exports.__widl_f_uniform1i_WebGLRenderingContext = function(arg0, arg1, arg2) {
-    getObject(arg0).uniform1i(getObject(arg1), arg2);
-};
-
-__exports.__widl_f_uniform2f_WebGLRenderingContext = function(arg0, arg1, arg2, arg3) {
-    getObject(arg0).uniform2f(getObject(arg1), arg2, arg3);
-};
-
-__exports.__widl_f_use_program_WebGLRenderingContext = function(arg0, arg1) {
-    getObject(arg0).useProgram(getObject(arg1));
-};
-
-__exports.__widl_f_vertex_attrib_pointer_with_i32_WebGLRenderingContext = function(arg0, arg1, arg2, arg3, arg4, arg5, arg6) {
-    getObject(arg0).vertexAttribPointer(arg1, arg2, arg3, arg4 !== 0, arg5, arg6);
-};
-
-__exports.__widl_f_viewport_WebGLRenderingContext = function(arg0, arg1, arg2, arg3, arg4) {
-    getObject(arg0).viewport(arg1, arg2, arg3, arg4);
-};
-
-__exports.__widl_f_drawing_buffer_width_WebGLRenderingContext = function(arg0) {
-    return getObject(arg0).drawingBufferWidth;
-};
-
-__exports.__widl_f_drawing_buffer_height_WebGLRenderingContext = function(arg0) {
-    return getObject(arg0).drawingBufferHeight;
-};
-
-__exports.__widl_instanceof_Window = function(idx) { return getObject(idx) instanceof Window ? 1 : 0; };
-
-__exports.__widl_f_document_Window = function(arg0) {
-
-    const val = getObject(arg0).document;
-    return isLikeNone(val) ? 0 : addHeapObject(val);
-
-};
-
-__exports.__widl_f_performance_Window = function(arg0) {
-
-    const val = getObject(arg0).performance;
-    return isLikeNone(val) ? 0 : addHeapObject(val);
-
-};
-
-__exports.__wbg_new_a2f07ab237bf3627 = function(arg0) {
-    return addHeapObject(new Float32Array(getObject(arg0)));
-};
-
-__exports.__wbg_subarray_570c38fd448b1fe6 = function(arg0, arg1, arg2) {
-    return addHeapObject(getObject(arg0).subarray(arg1, arg2));
-};
-
-__exports.__wbg_newnoargs_3c6fc8d4dae9ea25 = function(arg0, arg1) {
-    let varg0 = getStringFromWasm(arg0, arg1);
-    return addHeapObject(new Function(varg0));
-};
-
-__exports.__wbg_call_d3e8beef2a1dcd98 = function(arg0, arg1, exnptr) {
-    try {
-        return addHeapObject(getObject(arg0).call(getObject(arg1)));
-    } catch (e) {
-        handleError(exnptr, e);
-    }
-};
-
-__exports.__wbg_new_f76b11c0cbb3494f = function(arg0) {
-    return addHeapObject(new Int16Array(getObject(arg0)));
-};
-
-__exports.__wbg_subarray_5939bb5593602b7f = function(arg0, arg1, arg2) {
-    return addHeapObject(getObject(arg0).subarray(arg1, arg2));
-};
-
-__exports.__wbg_new_0545b2bd45b80279 = function(arg0) {
-    return addHeapObject(new Uint8Array(getObject(arg0)));
-};
-
-__exports.__wbg_subarray_38d1753fa45ff9db = function(arg0, arg1, arg2) {
-    return addHeapObject(getObject(arg0).subarray(arg1, arg2));
-};
-
-__exports.__wbg_new_b00ac3cd4d449d77 = function(arg0) {
-    return addHeapObject(new Uint16Array(getObject(arg0)));
-};
-
-__exports.__wbg_subarray_c2de59c144bab5a1 = function(arg0, arg1, arg2) {
-    return addHeapObject(getObject(arg0).subarray(arg1, arg2));
-};
-
-__exports.__wbg_instanceof_Memory_98e1f75012963cf9 = function(idx) { return getObject(idx) instanceof WebAssembly.Memory ? 1 : 0; };
-
-__exports.__wbg_buffer_56cac7ead8d97f53 = function(arg0) {
-    return addHeapObject(getObject(arg0).buffer);
-};
-
-__exports.__wbindgen_string_new = function(p, l) { return addHeapObject(getStringFromWasm(p, l)); };
-
-__exports.__wbindgen_boolean_get = function(i) {
-    let v = getObject(i);
-    return typeof(v) === 'boolean' ? (v ? 1 : 0) : 2;
-};
-
-__exports.__wbindgen_debug_string = function(i, len_ptr) {
-    const debug_str =
-    val => {
-        // primitive types
-        const type = typeof val;
-        if (type == 'number' || type == 'boolean' || val == null) {
-            return  `${val}`;
-        }
-        if (type == 'string') {
-            return `"${val}"`;
-        }
-        if (type == 'symbol') {
-            const description = val.description;
-            if (description == null) {
-                return 'Symbol';
-            } else {
-                return `Symbol(${description})`;
-            }
-        }
-        if (type == 'function') {
-            const name = val.name;
-            if (typeof name == 'string' && name.length > 0) {
-                return `Function(${name})`;
-            } else {
-                return 'Function';
-            }
-        }
-        // objects
-        if (Array.isArray(val)) {
-            const length = val.length;
-            let debug = '[';
-            if (length > 0) {
-                debug += debug_str(val[0]);
-            }
-            for(let i = 1; i < length; i++) {
-                debug += ', ' + debug_str(val[i]);
-            }
-            debug += ']';
-            return debug;
-        }
-        // Test for built-in
-        const builtInMatches = /\[object ([^\]]+)\]/.exec(toString.call(val));
-        let className;
-        if (builtInMatches.length > 1) {
-            className = builtInMatches[1];
-        } else {
-            // Failed to match the standard '[object ClassName]'
-            return toString.call(val);
-        }
-        if (className == 'Object') {
-            // we're a user defined class or Object
-            // JSON.stringify avoids problems with cycles, and is generally much
-            // easier than looping through ownProperties of `val`.
-            try {
-                return 'Object(' + JSON.stringify(val) + ')';
-            } catch (_) {
-                return 'Object';
-            }
-        }
-        // errors
-        if (val instanceof Error) {
-        return `${val.name}: ${val.message}
-        ${val.stack}`;
-    }
-    // TODO we could test for more things here, like `Set`s and `Map`s.
-    return className;
-}
-;
-const toString = Object.prototype.toString;
-const val = getObject(i);
-const debug = debug_str(val);
-const ptr = passStringToWasm(debug);
-getUint32Memory()[len_ptr / 4] = WASM_VECTOR_LEN;
-return ptr;
-};
-
-__exports.__wbindgen_memory = function() { return addHeapObject(wasm.memory); };
-
 function dropObject(idx) {
     if (idx < 36) return;
     heap[idx] = heap_next;
@@ -495,15 +23,197 @@ function takeObject(idx) {
     return ret;
 }
 
-__exports.__wbindgen_rethrow = function(idx) { throw takeObject(idx); };
+let cachedTextDecoder = new TextDecoder('utf-8', { ignoreBOM: true, fatal: true });
 
-__exports.__wbindgen_throw = function(ptr, len) {
-    throw new Error(getStringFromWasm(ptr, len));
+cachedTextDecoder.decode();
+
+let cachegetUint8Memory0 = null;
+function getUint8Memory0() {
+    if (cachegetUint8Memory0 === null || cachegetUint8Memory0.buffer !== wasm.memory.buffer) {
+        cachegetUint8Memory0 = new Uint8Array(wasm.memory.buffer);
+    }
+    return cachegetUint8Memory0;
+}
+
+function getStringFromWasm0(ptr, len) {
+    return cachedTextDecoder.decode(getUint8Memory0().subarray(ptr, ptr + len));
+}
+
+function addHeapObject(obj) {
+    if (heap_next === heap.length) heap.push(heap.length + 1);
+    const idx = heap_next;
+    heap_next = heap[idx];
+
+    heap[idx] = obj;
+    return idx;
+}
+
+function debugString(val) {
+    // primitive types
+    const type = typeof val;
+    if (type == 'number' || type == 'boolean' || val == null) {
+        return  `${val}`;
+    }
+    if (type == 'string') {
+        return `"${val}"`;
+    }
+    if (type == 'symbol') {
+        const description = val.description;
+        if (description == null) {
+            return 'Symbol';
+        } else {
+            return `Symbol(${description})`;
+        }
+    }
+    if (type == 'function') {
+        const name = val.name;
+        if (typeof name == 'string' && name.length > 0) {
+            return `Function(${name})`;
+        } else {
+            return 'Function';
+        }
+    }
+    // objects
+    if (Array.isArray(val)) {
+        const length = val.length;
+        let debug = '[';
+        if (length > 0) {
+            debug += debugString(val[0]);
+        }
+        for(let i = 1; i < length; i++) {
+            debug += ', ' + debugString(val[i]);
+        }
+        debug += ']';
+        return debug;
+    }
+    // Test for built-in
+    const builtInMatches = /\[object ([^\]]+)\]/.exec(toString.call(val));
+    let className;
+    if (builtInMatches.length > 1) {
+        className = builtInMatches[1];
+    } else {
+        // Failed to match the standard '[object ClassName]'
+        return toString.call(val);
+    }
+    if (className == 'Object') {
+        // we're a user defined class or Object
+        // JSON.stringify avoids problems with cycles, and is generally much
+        // easier than looping through ownProperties of `val`.
+        try {
+            return 'Object(' + JSON.stringify(val) + ')';
+        } catch (_) {
+            return 'Object';
+        }
+    }
+    // errors
+    if (val instanceof Error) {
+        return `${val.name}: ${val.message}\n${val.stack}`;
+    }
+    // TODO we could test for more things here, like `Set`s and `Map`s.
+    return className;
+}
+
+let WASM_VECTOR_LEN = 0;
+
+let cachedTextEncoder = new TextEncoder('utf-8');
+
+const encodeString = (typeof cachedTextEncoder.encodeInto === 'function'
+    ? function (arg, view) {
+    return cachedTextEncoder.encodeInto(arg, view);
+}
+    : function (arg, view) {
+    const buf = cachedTextEncoder.encode(arg);
+    view.set(buf);
+    return {
+        read: arg.length,
+        written: buf.length
+    };
+});
+
+function passStringToWasm0(arg, malloc, realloc) {
+
+    if (realloc === undefined) {
+        const buf = cachedTextEncoder.encode(arg);
+        const ptr = malloc(buf.length);
+        getUint8Memory0().subarray(ptr, ptr + buf.length).set(buf);
+        WASM_VECTOR_LEN = buf.length;
+        return ptr;
+    }
+
+    let len = arg.length;
+    let ptr = malloc(len);
+
+    const mem = getUint8Memory0();
+
+    let offset = 0;
+
+    for (; offset < len; offset++) {
+        const code = arg.charCodeAt(offset);
+        if (code > 0x7F) break;
+        mem[ptr + offset] = code;
+    }
+
+    if (offset !== len) {
+        if (offset !== 0) {
+            arg = arg.slice(offset);
+        }
+        ptr = realloc(ptr, len, len = offset + arg.length * 3);
+        const view = getUint8Memory0().subarray(ptr + offset, ptr + len);
+        const ret = encodeString(arg, view);
+
+        offset += ret.written;
+    }
+
+    WASM_VECTOR_LEN = offset;
+    return ptr;
+}
+
+let cachegetInt32Memory0 = null;
+function getInt32Memory0() {
+    if (cachegetInt32Memory0 === null || cachegetInt32Memory0.buffer !== wasm.memory.buffer) {
+        cachegetInt32Memory0 = new Int32Array(wasm.memory.buffer);
+    }
+    return cachegetInt32Memory0;
+}
+/**
+* @param {string} canvas_id
+* @param {number} pixels_per_point
+* @returns {State}
+*/
+__exports.new_webgl_gui = function(canvas_id, pixels_per_point) {
+    var ptr0 = passStringToWasm0(canvas_id, wasm.__wbindgen_malloc, wasm.__wbindgen_realloc);
+    var len0 = WASM_VECTOR_LEN;
+    var ret = wasm.new_webgl_gui(ptr0, len0, pixels_per_point);
+    return State.__wrap(ret);
 };
 
-function freeState(ptr) {
+function _assertClass(instance, klass) {
+    if (!(instance instanceof klass)) {
+        throw new Error(`expected instance of ${klass.name}`);
+    }
+    return instance.ptr;
+}
+/**
+* @param {State} state
+* @param {string} raw_input_json
+*/
+__exports.run_gui = function(state, raw_input_json) {
+    _assertClass(state, State);
+    var ptr0 = passStringToWasm0(raw_input_json, wasm.__wbindgen_malloc, wasm.__wbindgen_realloc);
+    var len0 = WASM_VECTOR_LEN;
+    wasm.run_gui(state.ptr, ptr0, len0);
+};
 
-    wasm.__wbg_state_free(ptr);
+function isLikeNone(x) {
+    return x === undefined || x === null;
+}
+
+function getArrayU8FromWasm0(ptr, len) {
+    return getUint8Memory0().subarray(ptr / 1, ptr / 1 + len);
+}
+
+function handleError(e) {
+    wasm.__wbindgen_exn_store(addHeapObject(e));
 }
 /**
 */
@@ -519,52 +229,356 @@ class State {
     free() {
         const ptr = this.ptr;
         this.ptr = 0;
-        freeState(ptr);
-    }
 
+        wasm.__wbg_state_free(ptr);
+    }
 }
 __exports.State = State;
 
-__exports.__wbindgen_object_clone_ref = function(idx) {
-    return addHeapObject(getObject(idx));
-};
+async function load(module, imports) {
+    if (typeof Response === 'function' && module instanceof Response) {
 
-__exports.__wbindgen_object_drop_ref = function(i) { dropObject(i); };
+        if (typeof WebAssembly.instantiateStreaming === 'function') {
+            try {
+                return await WebAssembly.instantiateStreaming(module, imports);
 
-function init(module_or_path, maybe_memory) {
-    let result;
-    const imports = { './example_wasm': __exports };
-    if (module_or_path instanceof WebAssembly.Module) {
+            } catch (e) {
+                if (module.headers.get('Content-Type') != 'application/wasm') {
+                    console.warn("`WebAssembly.instantiateStreaming` failed because your server does not serve wasm with `application/wasm` MIME type. Falling back to `WebAssembly.instantiate` which is slower. Original error:\n", e);
+
+                } else {
+                    throw e;
+                }
+            }
+        }
+
+        const bytes = await module.arrayBuffer();
+        return await WebAssembly.instantiate(bytes, imports);
 
-        result = WebAssembly.instantiate(module_or_path, imports)
-        .then(instance => {
-            return { instance, module: module_or_path };
-        });
     } else {
 
-        const response = fetch(module_or_path);
-        if (typeof WebAssembly.instantiateStreaming === 'function') {
-            result = WebAssembly.instantiateStreaming(response, imports)
-            .catch(e => {
-                console.warn("`WebAssembly.instantiateStreaming` failed. Assuming this is because your server does not serve wasm with `application/wasm` MIME type. Falling back to `WebAssembly.instantiate` which is slower. Original error:\n", e);
-                return response
-                .then(r => r.arrayBuffer())
-                .then(bytes => WebAssembly.instantiate(bytes, imports));
-            });
+        const instance = await WebAssembly.instantiate(module, imports);
+
+        if (instance instanceof WebAssembly.Instance) {
+            return { instance, module };
+
         } else {
-            result = response
-            .then(r => r.arrayBuffer())
-            .then(bytes => WebAssembly.instantiate(bytes, imports));
+            return instance;
         }
     }
-    return result.then(({instance, module}) => {
-        wasm = instance.exports;
-        init.__wbindgen_wasm_module = module;
-
-        return wasm;
-    });
 }
 
-self.wasm_bindgen = Object.assign(init, __exports);
+async function init(input) {
+    if (typeof input === 'undefined') {
+        let src;
+        if (typeof document === 'undefined') {
+            src = location.href;
+        } else {
+            src = document.currentScript.src;
+        }
+        input = src.replace(/\.js$/, '_bg.wasm');
+    }
+    const imports = {};
+    imports.wbg = {};
+    imports.wbg.__wbindgen_object_drop_ref = function(arg0) {
+        takeObject(arg0);
+    };
+    imports.wbg.__wbindgen_string_new = function(arg0, arg1) {
+        var ret = getStringFromWasm0(arg0, arg1);
+        return addHeapObject(ret);
+    };
+    imports.wbg.__wbg_instanceof_Window_a633dbe0900c728a = function(arg0) {
+        var ret = getObject(arg0) instanceof Window;
+        return ret;
+    };
+    imports.wbg.__wbg_document_07444f1bbea314bb = function(arg0) {
+        var ret = getObject(arg0).document;
+        return isLikeNone(ret) ? 0 : addHeapObject(ret);
+    };
+    imports.wbg.__wbg_performance_cc98652048194dbe = function(arg0) {
+        var ret = getObject(arg0).performance;
+        return isLikeNone(ret) ? 0 : addHeapObject(ret);
+    };
+    imports.wbg.__wbg_getElementById_633c94a971ae0eb9 = function(arg0, arg1, arg2) {
+        var ret = getObject(arg0).getElementById(getStringFromWasm0(arg1, arg2));
+        return isLikeNone(ret) ? 0 : addHeapObject(ret);
+    };
+    imports.wbg.__wbg_instanceof_WebGlRenderingContext_3aadcbc31d1748d3 = function(arg0) {
+        var ret = getObject(arg0) instanceof WebGLRenderingContext;
+        return ret;
+    };
+    imports.wbg.__wbg_drawingBufferWidth_50e3f45aea4750e2 = function(arg0) {
+        var ret = getObject(arg0).drawingBufferWidth;
+        return ret;
+    };
+    imports.wbg.__wbg_drawingBufferHeight_711d2661310b16d2 = function(arg0) {
+        var ret = getObject(arg0).drawingBufferHeight;
+        return ret;
+    };
+    imports.wbg.__wbg_bufferData_985a5ff391474177 = function(arg0, arg1, arg2, arg3) {
+        getObject(arg0).bufferData(arg1 >>> 0, getObject(arg2), arg3 >>> 0);
+    };
+    imports.wbg.__wbg_texImage2D_97bf65dbb078a110 = function(arg0, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9, arg10) {
+        try {
+            getObject(arg0).texImage2D(arg1 >>> 0, arg2, arg3, arg4, arg5, arg6, arg7 >>> 0, arg8 >>> 0, arg9 === 0 ? undefined : getArrayU8FromWasm0(arg9, arg10));
+        } catch (e) {
+            handleError(e)
+        }
+    };
+    imports.wbg.__wbg_activeTexture_284cde3f352835a4 = function(arg0, arg1) {
+        getObject(arg0).activeTexture(arg1 >>> 0);
+    };
+    imports.wbg.__wbg_attachShader_9564db836e3d4ece = function(arg0, arg1, arg2) {
+        getObject(arg0).attachShader(getObject(arg1), getObject(arg2));
+    };
+    imports.wbg.__wbg_bindBuffer_6cc973b0a3488535 = function(arg0, arg1, arg2) {
+        getObject(arg0).bindBuffer(arg1 >>> 0, getObject(arg2));
+    };
+    imports.wbg.__wbg_bindTexture_812a67a84575f09d = function(arg0, arg1, arg2) {
+        getObject(arg0).bindTexture(arg1 >>> 0, getObject(arg2));
+    };
+    imports.wbg.__wbg_blendFunc_25c67ec3e4deab0e = function(arg0, arg1, arg2) {
+        getObject(arg0).blendFunc(arg1 >>> 0, arg2 >>> 0);
+    };
+    imports.wbg.__wbg_clear_c50cee241485d576 = function(arg0, arg1) {
+        getObject(arg0).clear(arg1 >>> 0);
+    };
+    imports.wbg.__wbg_clearColor_ce7ee2c8c34d229d = function(arg0, arg1, arg2, arg3, arg4) {
+        getObject(arg0).clearColor(arg1, arg2, arg3, arg4);
+    };
+    imports.wbg.__wbg_compileShader_91ce1c5df480321c = function(arg0, arg1) {
+        getObject(arg0).compileShader(getObject(arg1));
+    };
+    imports.wbg.__wbg_createBuffer_1b29c13abf687b68 = function(arg0) {
+        var ret = getObject(arg0).createBuffer();
+        return isLikeNone(ret) ? 0 : addHeapObject(ret);
+    };
+    imports.wbg.__wbg_createProgram_0bbeea9ffc5daa63 = function(arg0) {
+        var ret = getObject(arg0).createProgram();
+        return isLikeNone(ret) ? 0 : addHeapObject(ret);
+    };
+    imports.wbg.__wbg_createShader_cdd9f1769cd1de1e = function(arg0, arg1) {
+        var ret = getObject(arg0).createShader(arg1 >>> 0);
+        return isLikeNone(ret) ? 0 : addHeapObject(ret);
+    };
+    imports.wbg.__wbg_createTexture_7fc81a3938b40da8 = function(arg0) {
+        var ret = getObject(arg0).createTexture();
+        return isLikeNone(ret) ? 0 : addHeapObject(ret);
+    };
+    imports.wbg.__wbg_drawElements_83168f7468007ab3 = function(arg0, arg1, arg2, arg3, arg4) {
+        getObject(arg0).drawElements(arg1 >>> 0, arg2, arg3 >>> 0, arg4);
+    };
+    imports.wbg.__wbg_enable_afe858cc8ac02cab = function(arg0, arg1) {
+        getObject(arg0).enable(arg1 >>> 0);
+    };
+    imports.wbg.__wbg_enableVertexAttribArray_1b8360d81db7d6f0 = function(arg0, arg1) {
+        getObject(arg0).enableVertexAttribArray(arg1 >>> 0);
+    };
+    imports.wbg.__wbg_getAttribLocation_ce1df105f2722b0b = function(arg0, arg1, arg2, arg3) {
+        var ret = getObject(arg0).getAttribLocation(getObject(arg1), getStringFromWasm0(arg2, arg3));
+        return ret;
+    };
+    imports.wbg.__wbg_getProgramInfoLog_2a1da5b17664faa9 = function(arg0, arg1, arg2) {
+        var ret = getObject(arg1).getProgramInfoLog(getObject(arg2));
+        var ptr0 = isLikeNone(ret) ? 0 : passStringToWasm0(ret, wasm.__wbindgen_malloc, wasm.__wbindgen_realloc);
+        var len0 = WASM_VECTOR_LEN;
+        getInt32Memory0()[arg0 / 4 + 1] = len0;
+        getInt32Memory0()[arg0 / 4 + 0] = ptr0;
+    };
+    imports.wbg.__wbg_getProgramParameter_ff1b7fa34d0991f5 = function(arg0, arg1, arg2) {
+        var ret = getObject(arg0).getProgramParameter(getObject(arg1), arg2 >>> 0);
+        return addHeapObject(ret);
+    };
+    imports.wbg.__wbg_getShaderInfoLog_5a8842f27648dd20 = function(arg0, arg1, arg2) {
+        var ret = getObject(arg1).getShaderInfoLog(getObject(arg2));
+        var ptr0 = isLikeNone(ret) ? 0 : passStringToWasm0(ret, wasm.__wbindgen_malloc, wasm.__wbindgen_realloc);
+        var len0 = WASM_VECTOR_LEN;
+        getInt32Memory0()[arg0 / 4 + 1] = len0;
+        getInt32Memory0()[arg0 / 4 + 0] = ptr0;
+    };
+    imports.wbg.__wbg_getShaderParameter_9fe8d76217a4969c = function(arg0, arg1, arg2) {
+        var ret = getObject(arg0).getShaderParameter(getObject(arg1), arg2 >>> 0);
+        return addHeapObject(ret);
+    };
+    imports.wbg.__wbg_getUniformLocation_bcdd3b3a38c50a03 = function(arg0, arg1, arg2, arg3) {
+        var ret = getObject(arg0).getUniformLocation(getObject(arg1), getStringFromWasm0(arg2, arg3));
+        return isLikeNone(ret) ? 0 : addHeapObject(ret);
+    };
+    imports.wbg.__wbg_linkProgram_cba038b57a3871ef = function(arg0, arg1) {
+        getObject(arg0).linkProgram(getObject(arg1));
+    };
+    imports.wbg.__wbg_shaderSource_57dcf3bb9d5a2045 = function(arg0, arg1, arg2, arg3) {
+        getObject(arg0).shaderSource(getObject(arg1), getStringFromWasm0(arg2, arg3));
+    };
+    imports.wbg.__wbg_texParameteri_0538bb1eb7de4f3b = function(arg0, arg1, arg2, arg3) {
+        getObject(arg0).texParameteri(arg1 >>> 0, arg2 >>> 0, arg3);
+    };
+    imports.wbg.__wbg_uniform1i_bc5e1e88172a4393 = function(arg0, arg1, arg2) {
+        getObject(arg0).uniform1i(getObject(arg1), arg2);
+    };
+    imports.wbg.__wbg_uniform2f_c1a2fa4599b15748 = function(arg0, arg1, arg2, arg3) {
+        getObject(arg0).uniform2f(getObject(arg1), arg2, arg3);
+    };
+    imports.wbg.__wbg_useProgram_324a22a196d1f113 = function(arg0, arg1) {
+        getObject(arg0).useProgram(getObject(arg1));
+    };
+    imports.wbg.__wbg_vertexAttribPointer_0e306f7de4de676a = function(arg0, arg1, arg2, arg3, arg4, arg5, arg6) {
+        getObject(arg0).vertexAttribPointer(arg1 >>> 0, arg2, arg3 >>> 0, arg4 !== 0, arg5, arg6);
+    };
+    imports.wbg.__wbg_viewport_e581bdce9dbf078f = function(arg0, arg1, arg2, arg3, arg4) {
+        getObject(arg0).viewport(arg1, arg2, arg3, arg4);
+    };
+    imports.wbg.__wbg_now_ce4a6a89baf241c9 = function(arg0) {
+        var ret = getObject(arg0).now();
+        return ret;
+    };
+    imports.wbg.__wbg_instanceof_HtmlCanvasElement_c6a06fc9a851a478 = function(arg0) {
+        var ret = getObject(arg0) instanceof HTMLCanvasElement;
+        return ret;
+    };
+    imports.wbg.__wbg_width_e29d6e8a5c409d12 = function(arg0) {
+        var ret = getObject(arg0).width;
+        return ret;
+    };
+    imports.wbg.__wbg_height_f1097727b2ec35e1 = function(arg0) {
+        var ret = getObject(arg0).height;
+        return ret;
+    };
+    imports.wbg.__wbg_getContext_2151b76e11a6eb39 = function(arg0, arg1, arg2) {
+        try {
+            var ret = getObject(arg0).getContext(getStringFromWasm0(arg1, arg2));
+            return isLikeNone(ret) ? 0 : addHeapObject(ret);
+        } catch (e) {
+            handleError(e)
+        }
+    };
+    imports.wbg.__wbg_call_804d3ad7e8acd4d5 = function(arg0, arg1) {
+        try {
+            var ret = getObject(arg0).call(getObject(arg1));
+            return addHeapObject(ret);
+        } catch (e) {
+            handleError(e)
+        }
+    };
+    imports.wbg.__wbindgen_object_clone_ref = function(arg0) {
+        var ret = getObject(arg0);
+        return addHeapObject(ret);
+    };
+    imports.wbg.__wbg_newnoargs_ebdc90c3d1e4e55d = function(arg0, arg1) {
+        var ret = new Function(getStringFromWasm0(arg0, arg1));
+        return addHeapObject(ret);
+    };
+    imports.wbg.__wbg_globalThis_48a5e9494e623f26 = function() {
+        try {
+            var ret = globalThis.globalThis;
+            return addHeapObject(ret);
+        } catch (e) {
+            handleError(e)
+        }
+    };
+    imports.wbg.__wbg_self_25067cb019cade42 = function() {
+        try {
+            var ret = self.self;
+            return addHeapObject(ret);
+        } catch (e) {
+            handleError(e)
+        }
+    };
+    imports.wbg.__wbg_window_9e80200b35aa30f8 = function() {
+        try {
+            var ret = window.window;
+            return addHeapObject(ret);
+        } catch (e) {
+            handleError(e)
+        }
+    };
+    imports.wbg.__wbg_global_7583a634265a91fc = function() {
+        try {
+            var ret = global.global;
+            return addHeapObject(ret);
+        } catch (e) {
+            handleError(e)
+        }
+    };
+    imports.wbg.__wbindgen_is_undefined = function(arg0) {
+        var ret = getObject(arg0) === undefined;
+        return ret;
+    };
+    imports.wbg.__wbg_buffer_f897a8d316863411 = function(arg0) {
+        var ret = getObject(arg0).buffer;
+        return addHeapObject(ret);
+    };
+    imports.wbg.__wbg_new_af4a59d3b3f5181e = function(arg0) {
+        var ret = new Int16Array(getObject(arg0));
+        return addHeapObject(ret);
+    };
+    imports.wbg.__wbg_new_da17c07b1fbb4a8b = function(arg0) {
+        var ret = new Uint8Array(getObject(arg0));
+        return addHeapObject(ret);
+    };
+    imports.wbg.__wbg_new_4a7b173cfef3dba5 = function(arg0) {
+        var ret = new Uint16Array(getObject(arg0));
+        return addHeapObject(ret);
+    };
+    imports.wbg.__wbg_new_4546c9674ba984b4 = function(arg0) {
+        var ret = new Float32Array(getObject(arg0));
+        return addHeapObject(ret);
+    };
+    imports.wbg.__wbg_subarray_906b02024572f8b3 = function(arg0, arg1, arg2) {
+        var ret = getObject(arg0).subarray(arg1 >>> 0, arg2 >>> 0);
+        return addHeapObject(ret);
+    };
+    imports.wbg.__wbg_subarray_c77de664af940d15 = function(arg0, arg1, arg2) {
+        var ret = getObject(arg0).subarray(arg1 >>> 0, arg2 >>> 0);
+        return addHeapObject(ret);
+    };
+    imports.wbg.__wbg_subarray_bc57107545fd152f = function(arg0, arg1, arg2) {
+        var ret = getObject(arg0).subarray(arg1 >>> 0, arg2 >>> 0);
+        return addHeapObject(ret);
+    };
+    imports.wbg.__wbg_subarray_cb31efc6e4847e6e = function(arg0, arg1, arg2) {
+        var ret = getObject(arg0).subarray(arg1 >>> 0, arg2 >>> 0);
+        return addHeapObject(ret);
+    };
+    imports.wbg.__wbg_instanceof_Memory_7ccbf540b50fc2bf = function(arg0) {
+        var ret = getObject(arg0) instanceof WebAssembly.Memory;
+        return ret;
+    };
+    imports.wbg.__wbindgen_boolean_get = function(arg0) {
+        const v = getObject(arg0);
+        var ret = typeof(v) === 'boolean' ? (v ? 1 : 0) : 2;
+        return ret;
+    };
+    imports.wbg.__wbindgen_debug_string = function(arg0, arg1) {
+        var ret = debugString(getObject(arg1));
+        var ptr0 = passStringToWasm0(ret, wasm.__wbindgen_malloc, wasm.__wbindgen_realloc);
+        var len0 = WASM_VECTOR_LEN;
+        getInt32Memory0()[arg0 / 4 + 1] = len0;
+        getInt32Memory0()[arg0 / 4 + 0] = ptr0;
+    };
+    imports.wbg.__wbindgen_throw = function(arg0, arg1) {
+        throw new Error(getStringFromWasm0(arg0, arg1));
+    };
+    imports.wbg.__wbindgen_rethrow = function(arg0) {
+        throw takeObject(arg0);
+    };
+    imports.wbg.__wbindgen_memory = function() {
+        var ret = wasm.memory;
+        return addHeapObject(ret);
+    };
+
+    if (typeof input === 'string' || (typeof Request === 'function' && input instanceof Request) || (typeof URL === 'function' && input instanceof URL)) {
+        input = fetch(input);
+    }
+
+    const { instance, module } = await load(await input, imports);
+
+    wasm = instance.exports;
+    init.__wbindgen_wasm_module = module;
+
+    return wasm;
+}
+
+wasm_bindgen = Object.assign(init, __exports);
 
 })();
diff --git a/docs/example_wasm_bg.wasm b/docs/example_wasm_bg.wasm
index cf197e50..830e71f4 100644
Binary files a/docs/example_wasm_bg.wasm and b/docs/example_wasm_bg.wasm differ