Application prototype #14
4
app-proto/inversive-display/.gitignore
vendored
4
app-proto/inversive-display/.gitignore
vendored
@ -1,4 +0,0 @@
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target
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dist
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profiling
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Cargo.lock
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@ -1,40 +0,0 @@
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[package]
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name = "inversive-display"
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version = "0.1.0"
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authors = ["Aaron"]
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edition = "2021"
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[features]
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default = ["console_error_panic_hook"]
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[dependencies]
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js-sys = "0.3.70"
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nalgebra = "0.33.0"
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sycamore = "0.9.0-beta.2"
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# The `console_error_panic_hook` crate provides better debugging of panics by
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# logging them with `console.error`. This is great for development, but requires
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# all the `std::fmt` and `std::panicking` infrastructure, so isn't great for
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# code size when deploying.
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console_error_panic_hook = { version = "0.1.7", optional = true }
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[dependencies.web-sys]
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version = "0.3.69"
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features = [
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'HtmlCanvasElement',
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'Performance',
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'WebGl2RenderingContext',
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'WebGlBuffer',
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'WebGlProgram',
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'WebGlShader',
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'WebGlUniformLocation',
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'WebGlVertexArrayObject',
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'Window'
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]
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[dev-dependencies]
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wasm-bindgen-test = "0.3.34"
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[profile.release]
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opt-level = "s" # optimize for small code size
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debug = true # include debug symbols
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@ -1,9 +0,0 @@
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8"/>
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<title>Inversive display</title>
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<link data-trunk rel="css" href="main.css"/>
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</head>
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<body></body>
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</html>
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@ -1,74 +0,0 @@
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body {
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margin-left: 20px;
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margin-top: 20px;
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color: #fcfcfc;
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background-color: #202020;
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}
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#app {
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display: flex;
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flex-direction: column;
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width: 600px;
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}
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canvas {
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float: left;
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background-color: #020202;
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border: 1px solid #555;
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border-radius: 10px;
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margin-top: 5px;
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}
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canvas:focus {
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border-color: #aaa;
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}
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.hidden {
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display: none;
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}
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.control, .tab-pane {
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display: flex;
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flex-direction: row;
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width: 600px;
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}
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input[type="radio"] {
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appearance: none;
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width: 0px;
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height: 0px;
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padding: 0px;
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margin: 0px;
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outline: none;
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}
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.tab-pane > label {
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border: 1px solid #aaa;
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border-radius: 5px;
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text-align: center;
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padding: 5px;
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margin-right: 10px;
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margin-bottom: 5px;
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}
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.tab-pane > label:has(:checked) {
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border-color: #fcfcfc;
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background-color: #555;
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}
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.tab-pane > label:has(:focus-visible) {
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outline: medium auto currentColor;
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}
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.tab-pane > label:hover:not(:has(:checked)) {
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border-color: #bbb;
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background-color: #333;
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}
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.control > span {
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width: 170px;
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}
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input {
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flex-grow: 1;
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}
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@ -1,27 +0,0 @@
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use nalgebra::DVector;
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// the sphere with the given center and radius, with inward-pointing normals
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pub fn sphere(center_x: f64, center_y: f64, center_z: f64, radius: f64) -> DVector<f64> {
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let center_norm_sq = center_x * center_x + center_y * center_y + center_z * center_z;
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DVector::from_column_slice(&[
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center_x / radius,
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center_y / radius,
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center_z / radius,
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0.5 / radius,
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0.5 * (center_norm_sq / radius - radius)
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])
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}
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// the sphere of curvature `curv` whose closest point to the origin has position
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// `off * dir` and normal `dir`, where `dir` is a unit vector. setting the
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// curvature to zero gives a plane
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pub fn sphere_with_offset(dir_x: f64, dir_y: f64, dir_z: f64, off: f64, curv: f64) -> DVector<f64> {
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let norm_sp = 1.0 + off * curv;
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DVector::from_column_slice(&[
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norm_sp * dir_x,
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norm_sp * dir_y,
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norm_sp * dir_z,
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0.5 * curv,
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off * (1.0 + 0.5 * off * curv)
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])
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}
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@ -1,7 +0,0 @@
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#version 300 es
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in vec4 position;
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void main() {
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gl_Position = position;
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}
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@ -1,212 +0,0 @@
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#version 300 es
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precision highp float;
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out vec4 outColor;
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// --- inversive geometry ---
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struct vecInv {
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vec3 sp;
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vec2 lt;
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};
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// --- uniforms ---
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// construction
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const int SPHERE_MAX = 200;
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uniform int sphere_cnt;
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uniform vecInv sphere_list[SPHERE_MAX];
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uniform vec3 color_list[SPHERE_MAX];
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// view
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uniform vec2 resolution;
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uniform float shortdim;
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// controls
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uniform float opacity;
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uniform float highlight;
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uniform int layer_threshold;
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uniform bool debug_mode;
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// light and camera
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const float focal_slope = 0.3;
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const vec3 light_dir = normalize(vec3(2., 2., 1.));
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const float ixn_threshold = 0.005;
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const float INTERIOR_DIMMING = 0.7;
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// --- sRGB ---
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// map colors from RGB space to sRGB space, as specified in the sRGB standard
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// (IEC 61966-2-1:1999)
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//
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// https://www.color.org/sRGB.pdf
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// https://www.color.org/chardata/rgb/srgb.xalter
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//
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// in RGB space, color value is proportional to light intensity, so linear
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// color-vector interpolation corresponds to physical light mixing. in sRGB
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// space, the color encoding used by many monitors, we use more of the value
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// interval to represent low intensities, and less of the interval to represent
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// high intensities. this improves color quantization
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float sRGB(float t) {
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if (t <= 0.0031308) {
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return 12.92*t;
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} else {
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return 1.055*pow(t, 5./12.) - 0.055;
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}
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}
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vec3 sRGB(vec3 color) {
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return vec3(sRGB(color.r), sRGB(color.g), sRGB(color.b));
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}
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// --- shading ---
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struct taggedFrag {
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int id;
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vec4 color;
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vec3 pt;
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vec3 normal;
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};
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taggedFrag sphere_shading(vecInv v, vec3 pt, vec3 base_color, int id) {
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// the expression for normal needs to be checked. it's supposed to give the
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// negative gradient of the lorentz product between the impact point vector
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// and the sphere vector with respect to the coordinates of the impact
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// point. i calculated it in my head and decided that the result looked good
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// enough for now
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vec3 normal = normalize(-v.sp + 2.*v.lt.s*pt);
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float incidence = dot(normal, light_dir);
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float illum = mix(0.4, 1.0, max(incidence, 0.0));
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return taggedFrag(id, vec4(illum * base_color, opacity), pt, normal);
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}
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// --- ray-casting ---
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// if `a/b` is less than this threshold, we approximate `a*u^2 + b*u + c` by
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// the linear function `b*u + c`
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const float DEG_THRESHOLD = 1e-9;
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// the depths, represented as multiples of `dir`, where the line generated by
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// `dir` hits the sphere represented by `v`. if both depths are positive, the
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// smaller one is returned in the first component. if only one depth is
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// positive, it could be returned in either component
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vec2 sphere_cast(vecInv v, vec3 dir) {
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float a = -v.lt.s * dot(dir, dir);
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float b = dot(v.sp, dir);
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float c = -v.lt.t;
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float adjust = 4.*a*c/(b*b);
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if (adjust < 1.) {
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// as long as `b` is non-zero, the linear approximation of
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//
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// a*u^2 + b*u + c
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//
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// at `u = 0` will reach zero at a finite depth `u_lin`. the root of the
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// quadratic adjacent to `u_lin` is stored in `lin_root`. if both roots
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// have the same sign, `lin_root` will be the one closer to `u = 0`
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float square_rect_ratio = 1. + sqrt(1. - adjust);
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float lin_root = -(2.*c)/b / square_rect_ratio;
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if (abs(a) > DEG_THRESHOLD * abs(b)) {
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return vec2(lin_root, -b/(2.*a) * square_rect_ratio);
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} else {
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return vec2(lin_root, -1.);
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}
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} else {
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// the line through `dir` misses the sphere completely
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return vec2(-1., -1.);
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}
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}
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void main() {
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vec2 scr = (2.*gl_FragCoord.xy - resolution) / shortdim;
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vec3 dir = vec3(focal_slope * scr, -1.);
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// cast rays through the spheres
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const int LAYER_MAX = 12;
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taggedFrag frags [LAYER_MAX];
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int layer_cnt = 0;
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for (int id = 0; id < sphere_cnt; ++id) {
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// find out where the ray hits the sphere
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vec2 hit_depths = sphere_cast(sphere_list[id], dir);
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// insertion-sort the fragments we hit into the fragment list
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float dimming = 1.;
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for (int side = 0; side < 2; ++side) {
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float hit_z = -hit_depths[side];
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if (0. > hit_z) {
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for (int layer = layer_cnt; layer >= 0; --layer) {
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if (layer < 1 || frags[layer-1].pt.z >= hit_z) {
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// we're not as close to the screen as the fragment
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// before the empty slot, so insert here
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if (layer < LAYER_MAX) {
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frags[layer] = sphere_shading(
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sphere_list[id],
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hit_depths[side] * dir,
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dimming * color_list[id],
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id
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);
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}
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break;
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} else {
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// we're closer to the screen than the fragment before
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// the empty slot, so move that fragment into the empty
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// slot
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frags[layer] = frags[layer-1];
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}
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}
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layer_cnt = min(layer_cnt + 1, LAYER_MAX);
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dimming = INTERIOR_DIMMING;
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}
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}
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}
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/* DEBUG */
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// in debug mode, show the layer count instead of the shaded image
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if (debug_mode) {
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// at the bottom of the screen, show the color scale instead of the
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// layer count
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if (gl_FragCoord.y < 10.) layer_cnt = int(16. * gl_FragCoord.x / resolution.x);
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// convert number to color
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ivec3 bits = layer_cnt / ivec3(1, 2, 4);
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vec3 color = mod(vec3(bits), 2.);
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if (layer_cnt % 16 >= 8) {
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color = mix(color, vec3(0.5), 0.5);
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}
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outColor = vec4(color, 1.);
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return;
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}
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// highlight intersections and cusps
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for (int i = layer_cnt-1; i >= 1; --i) {
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// intersections
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taggedFrag frag0 = frags[i];
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taggedFrag frag1 = frags[i-1];
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float ixn_sin = length(cross(frag0.normal, frag1.normal));
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vec3 disp = frag0.pt - frag1.pt;
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float ixn_dist = max(
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abs(dot(frag1.normal, disp)),
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abs(dot(frag0.normal, disp))
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) / ixn_sin;
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float ixn_highlight = 0.5 * highlight * (1. - smoothstep(2./3.*ixn_threshold, 1.5*ixn_threshold, ixn_dist));
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frags[i].color = mix(frags[i].color, vec4(1.), ixn_highlight);
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frags[i-1].color = mix(frags[i-1].color, vec4(1.), ixn_highlight);
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// cusps
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float cusp_cos = abs(dot(dir, frag0.normal));
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float cusp_threshold = 2.*sqrt(ixn_threshold * sphere_list[frag0.id].lt.s);
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float cusp_highlight = highlight * (1. - smoothstep(2./3.*cusp_threshold, 1.5*cusp_threshold, cusp_cos));
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frags[i].color = mix(frags[i].color, vec4(1.), cusp_highlight);
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}
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// composite the sphere fragments
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vec3 color = vec3(0.);
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for (int i = layer_cnt-1; i >= layer_threshold; --i) {
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vec4 frag_color = frags[i].color;
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color = mix(color, frag_color.rgb, frag_color.a);
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}
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outColor = vec4(sRGB(color), 1.);
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}
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@ -1,744 +0,0 @@
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// based on the WebGL example in the `wasm-bindgen` guide
|
||||
//
|
||||
// https://rustwasm.github.io/wasm-bindgen/examples/webgl.html
|
||||
//
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||||
// and this StackOverflow answer by wangdq
|
||||
//
|
||||
// https://stackoverflow.com/a/39684775
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//
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||||
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use core::array;
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||||
use nalgebra::{DMatrix, DVector, Rotation3, Vector3};
|
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use sycamore::{prelude::*, motion::create_raf, rt::{JsCast, JsValue}};
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use web_sys::{
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console,
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||||
window,
|
||||
KeyboardEvent,
|
||||
WebGl2RenderingContext,
|
||||
WebGlProgram,
|
||||
WebGlShader,
|
||||
WebGlUniformLocation
|
||||
};
|
||||
|
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mod engine;
|
||||
|
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fn compile_shader(
|
||||
context: &WebGl2RenderingContext,
|
||||
shader_type: u32,
|
||||
source: &str,
|
||||
) -> WebGlShader {
|
||||
let shader = context.create_shader(shader_type).unwrap();
|
||||
context.shader_source(&shader, source);
|
||||
context.compile_shader(&shader);
|
||||
shader
|
||||
}
|
||||
|
||||
fn get_uniform_array_locations<const N: usize>(
|
||||
context: &WebGl2RenderingContext,
|
||||
program: &WebGlProgram,
|
||||
var_name: &str,
|
||||
member_name_opt: Option<&str>
|
||||
) -> [Option<WebGlUniformLocation>; N] {
|
||||
array::from_fn(|n| {
|
||||
let name = match member_name_opt {
|
||||
Some(member_name) => format!("{var_name}[{n}].{member_name}"),
|
||||
None => format!("{var_name}[{n}]")
|
||||
};
|
||||
context.get_uniform_location(&program, name.as_str())
|
||||
})
|
||||
}
|
||||
|
||||
// load the given data into the vertex input of the given name
|
||||
fn bind_vertex_attrib(
|
||||
context: &WebGl2RenderingContext,
|
||||
index: u32,
|
||||
size: i32,
|
||||
data: &[f32]
|
||||
) {
|
||||
// create a data buffer and bind it to ARRAY_BUFFER
|
||||
let buffer = context.create_buffer().unwrap();
|
||||
context.bind_buffer(WebGl2RenderingContext::ARRAY_BUFFER, Some(&buffer));
|
||||
|
||||
// load the given data into the buffer. the function `Float32Array::view`
|
||||
// creates a raw view into our module's `WebAssembly.Memory` buffer.
|
||||
// allocating more memory will change the buffer, invalidating the view.
|
||||
// that means we have to make sure we don't allocate any memory until the
|
||||
// view is dropped
|
||||
unsafe {
|
||||
context.buffer_data_with_array_buffer_view(
|
||||
WebGl2RenderingContext::ARRAY_BUFFER,
|
||||
&js_sys::Float32Array::view(&data),
|
||||
WebGl2RenderingContext::STATIC_DRAW,
|
||||
);
|
||||
}
|
||||
|
||||
// allow the target attribute to be used
|
||||
context.enable_vertex_attrib_array(index);
|
||||
|
||||
// take whatever's bound to ARRAY_BUFFER---here, the data buffer created
|
||||
// above---and bind it to the target attribute
|
||||
//
|
||||
// https://developer.mozilla.org/en-US/docs/Web/API/WebGLRenderingContext/vertexAttribPointer
|
||||
//
|
||||
context.vertex_attrib_pointer_with_i32(
|
||||
index,
|
||||
size,
|
||||
WebGl2RenderingContext::FLOAT,
|
||||
false, // don't normalize
|
||||
0, // zero stride
|
||||
0, // zero offset
|
||||
);
|
||||
}
|
||||
|
||||
fn push_gen_construction(
|
||||
sphere_vec: &mut Vec<DVector<f64>>,
|
||||
color_vec: &mut Vec<[f32; 3]>,
|
||||
construction_to_world: &DMatrix<f64>,
|
||||
ctrl_x: f64,
|
||||
ctrl_y: f64,
|
||||
radius_x: f64,
|
||||
radius_y: f64
|
||||
) {
|
||||
// push spheres
|
||||
sphere_vec.push(construction_to_world * engine::sphere(0.5, 0.5, ctrl_x, radius_x));
|
||||
sphere_vec.push(construction_to_world * engine::sphere(-0.5, -0.5, ctrl_y, radius_y));
|
||||
sphere_vec.push(construction_to_world * engine::sphere(-0.5, 0.5, 0.0, 0.75));
|
||||
sphere_vec.push(construction_to_world * engine::sphere(0.5, -0.5, 0.0, 0.5));
|
||||
sphere_vec.push(construction_to_world * engine::sphere(0.0, 0.15, 1.0, 0.25));
|
||||
sphere_vec.push(construction_to_world * engine::sphere(0.0, -0.15, -1.0, 0.25));
|
||||
|
||||
// push colors
|
||||
color_vec.push([1.00_f32, 0.25_f32, 0.00_f32]);
|
||||
color_vec.push([0.00_f32, 0.25_f32, 1.00_f32]);
|
||||
color_vec.push([0.25_f32, 0.00_f32, 1.00_f32]);
|
||||
color_vec.push([0.25_f32, 1.00_f32, 0.00_f32]);
|
||||
color_vec.push([0.75_f32, 0.75_f32, 0.00_f32]);
|
||||
color_vec.push([0.00_f32, 0.75_f32, 0.50_f32]);
|
||||
}
|
||||
|
||||
fn push_low_curv_construction(
|
||||
sphere_vec: &mut Vec<DVector<f64>>,
|
||||
color_vec: &mut Vec<[f32; 3]>,
|
||||
construction_to_world: &DMatrix<f64>,
|
||||
off1: f64,
|
||||
off2: f64,
|
||||
off3: f64,
|
||||
curv1: f64,
|
||||
curv2: f64,
|
||||
curv3: f64,
|
||||
) {
|
||||
// push spheres
|
||||
let a = 0.75_f64.sqrt();
|
||||
sphere_vec.push(construction_to_world * engine::sphere(0.0, 0.0, 0.0, 1.0));
|
||||
sphere_vec.push(construction_to_world * engine::sphere_with_offset(0.0, 0.0, 1.0, 0.0, 0.0));
|
||||
sphere_vec.push(construction_to_world * engine::sphere_with_offset(1.0, 0.0, 0.0, off1, curv1));
|
||||
sphere_vec.push(construction_to_world * engine::sphere_with_offset(-0.5, a, 0.0, off2, curv2));
|
||||
sphere_vec.push(construction_to_world * engine::sphere_with_offset(-0.5, -a, 0.0, off3, curv3));
|
||||
sphere_vec.push(construction_to_world * engine::sphere(-4.0/3.0, 0.0, 0.0, 1.0/3.0));
|
||||
sphere_vec.push(construction_to_world * engine::sphere(2.0/3.0, -4.0/3.0 * a, 0.0, 1.0/3.0));
|
||||
sphere_vec.push(construction_to_world * engine::sphere(2.0/3.0, 4.0/3.0 * a, 0.0, 1.0/3.0));
|
||||
|
||||
// push colors
|
||||
color_vec.push([0.75_f32, 0.75_f32, 0.75_f32]);
|
||||
color_vec.push([0.75_f32, 0.75_f32, 0.75_f32]);
|
||||
color_vec.push([1.00_f32, 0.00_f32, 0.25_f32]);
|
||||
color_vec.push([0.25_f32, 1.00_f32, 0.00_f32]);
|
||||
color_vec.push([0.00_f32, 0.25_f32, 1.00_f32]);
|
||||
color_vec.push([0.75_f32, 0.75_f32, 0.75_f32]);
|
||||
color_vec.push([0.75_f32, 0.75_f32, 0.75_f32]);
|
||||
color_vec.push([0.75_f32, 0.75_f32, 0.75_f32]);
|
||||
}
|
||||
|
||||
#[derive(Clone, Copy, PartialEq)]
|
||||
enum Tab {
|
||||
GenTab,
|
||||
LowCurvTab
|
||||
}
|
||||
|
||||
fn main() {
|
||||
// set up a config option that forwards panic messages to `console.error`
|
||||
#[cfg(feature = "console_error_panic_hook")]
|
||||
console_error_panic_hook::set_once();
|
||||
|
||||
sycamore::render(|| {
|
||||
// tab selection
|
||||
let tab_selection = create_signal(Tab::GenTab);
|
||||
|
||||
// navigation
|
||||
let pitch_up = create_signal(0.0);
|
||||
let pitch_down = create_signal(0.0);
|
||||
let yaw_right = create_signal(0.0);
|
||||
let yaw_left = create_signal(0.0);
|
||||
let roll_ccw = create_signal(0.0);
|
||||
let roll_cw = create_signal(0.0);
|
||||
let zoom_in = create_signal(0.0);
|
||||
let zoom_out = create_signal(0.0);
|
||||
|
||||
// controls for general example
|
||||
let gen_controls = create_node_ref();
|
||||
let ctrl_x = create_signal(0.0);
|
||||
let ctrl_y = create_signal(0.0);
|
||||
let radius_x = create_signal(1.0);
|
||||
let radius_y = create_signal(1.0);
|
||||
|
||||
// controls for low-curvature example
|
||||
let low_curv_controls = create_node_ref();
|
||||
let curv1 = create_signal(0.0);
|
||||
let curv2 = create_signal(0.0);
|
||||
let curv3 = create_signal(0.0);
|
||||
let off1 = create_signal(1.0);
|
||||
let off2 = create_signal(1.0);
|
||||
let off3 = create_signal(1.0);
|
||||
|
||||
// shared controls
|
||||
let opacity = create_signal(0.5);
|
||||
let highlight = create_signal(0.2);
|
||||
let turntable = create_signal(false);
|
||||
let layer_threshold = create_signal(0.0); /* DEBUG */
|
||||
let debug_mode = create_signal(false); /* DEBUG */
|
||||
|
||||
/* INSTRUMENTS */
|
||||
const SAMPLE_PERIOD: i32 = 60;
|
||||
let mut last_sample_time = 0.0;
|
||||
let mut frames_since_last_sample = 0;
|
||||
let mean_frame_interval = create_signal(0.0);
|
||||
|
||||
// display
|
||||
let display = create_node_ref();
|
||||
|
||||
// change listener
|
||||
let scene_changed = create_signal(true);
|
||||
create_effect(move || {
|
||||
// track tab selection
|
||||
tab_selection.track();
|
||||
|
||||
// track controls for general example
|
||||
ctrl_x.track();
|
||||
ctrl_y.track();
|
||||
radius_x.track();
|
||||
radius_y.track();
|
||||
|
||||
// track controls for low-curvature example
|
||||
curv1.track();
|
||||
curv2.track();
|
||||
curv3.track();
|
||||
off1.track();
|
||||
off2.track();
|
||||
off3.track();
|
||||
|
||||
// track shared controls
|
||||
opacity.track();
|
||||
highlight.track();
|
||||
turntable.track();
|
||||
layer_threshold.track();
|
||||
debug_mode.track();
|
||||
|
||||
scene_changed.set(true);
|
||||
});
|
||||
|
||||
on_mount(move || {
|
||||
// tab listener
|
||||
create_effect(move || {
|
||||
// get the control panel nodes
|
||||
let gen_controls_node = gen_controls.get::<DomNode>();
|
||||
let low_curv_controls_node = low_curv_controls.get::<DomNode>();
|
||||
|
||||
// hide all the control panels
|
||||
gen_controls_node.add_class("hidden");
|
||||
low_curv_controls_node.add_class("hidden");
|
||||
|
||||
// show the selected control panel
|
||||
match tab_selection.get() {
|
||||
Tab::GenTab => gen_controls_node.remove_class("hidden"),
|
||||
Tab::LowCurvTab => low_curv_controls_node.remove_class("hidden")
|
||||
}
|
||||
});
|
||||
|
||||
// create list of construction elements
|
||||
const SPHERE_MAX: usize = 200;
|
||||
let mut sphere_vec = Vec::<DVector<f64>>::new();
|
||||
let mut color_vec = Vec::<[f32; 3]>::new();
|
||||
|
||||
// timing
|
||||
let mut last_time = 0.0;
|
||||
|
||||
// scene parameters
|
||||
const ROT_SPEED: f64 = 0.4; // in radians per second
|
||||
const TURNTABLE_SPEED: f64 = 0.1; // in radians per second
|
||||
const ZOOM_SPEED: f64 = 0.15;
|
||||
let mut orientation = DMatrix::<f64>::identity(5, 5);
|
||||
let mut rotation = DMatrix::<f64>::identity(5, 5);
|
||||
let mut location_z: f64 = 5.0;
|
||||
|
||||
/* INSTRUMENTS */
|
||||
let performance = window().unwrap().performance().unwrap();
|
||||
|
||||
// get the display canvas
|
||||
let canvas = display
|
||||
.get::<DomNode>()
|
||||
.unchecked_into::<web_sys::HtmlCanvasElement>();
|
||||
let ctx = canvas
|
||||
.get_context("webgl2")
|
||||
.unwrap()
|
||||
.unwrap()
|
||||
.dyn_into::<WebGl2RenderingContext>()
|
||||
.unwrap();
|
||||
|
||||
// compile and attach the vertex and fragment shaders
|
||||
let vertex_shader = compile_shader(
|
||||
&ctx,
|
||||
WebGl2RenderingContext::VERTEX_SHADER,
|
||||
include_str!("identity.vert"),
|
||||
);
|
||||
let fragment_shader = compile_shader(
|
||||
&ctx,
|
||||
WebGl2RenderingContext::FRAGMENT_SHADER,
|
||||
include_str!("inversive.frag"),
|
||||
);
|
||||
let program = ctx.create_program().unwrap();
|
||||
ctx.attach_shader(&program, &vertex_shader);
|
||||
ctx.attach_shader(&program, &fragment_shader);
|
||||
ctx.link_program(&program);
|
||||
let link_status = ctx
|
||||
.get_program_parameter(&program, WebGl2RenderingContext::LINK_STATUS)
|
||||
.as_bool()
|
||||
.unwrap();
|
||||
let link_msg = if link_status {
|
||||
"Linked successfully"
|
||||
} else {
|
||||
"Linking failed"
|
||||
};
|
||||
console::log_1(&JsValue::from(link_msg));
|
||||
ctx.use_program(Some(&program));
|
||||
|
||||
/* DEBUG */
|
||||
// print the maximum number of vectors that can be passed as
|
||||
// uniforms to a fragment shader. the OpenGL ES 3.0 standard
|
||||
// requires this maximum to be at least 224, as discussed in the
|
||||
// documentation of the GL_MAX_FRAGMENT_UNIFORM_VECTORS parameter
|
||||
// here:
|
||||
//
|
||||
// https://registry.khronos.org/OpenGL-Refpages/es3.0/html/glGet.xhtml
|
||||
//
|
||||
// there are also other size limits. for example, on Aaron's
|
||||
// machine, the the length of a float or genType array seems to be
|
||||
// capped at 1024 elements
|
||||
console::log_2(
|
||||
&ctx.get_parameter(WebGl2RenderingContext::MAX_FRAGMENT_UNIFORM_VECTORS).unwrap(),
|
||||
&JsValue::from("uniform vectors available")
|
||||
);
|
||||
|
||||
// find indices of vertex attributes and uniforms
|
||||
let position_index = ctx.get_attrib_location(&program, "position") as u32;
|
||||
let sphere_cnt_loc = ctx.get_uniform_location(&program, "sphere_cnt");
|
||||
let sphere_sp_locs = get_uniform_array_locations::<SPHERE_MAX>(
|
||||
&ctx, &program, "sphere_list", Some("sp")
|
||||
);
|
||||
let sphere_lt_locs = get_uniform_array_locations::<SPHERE_MAX>(
|
||||
&ctx, &program, "sphere_list", Some("lt")
|
||||
);
|
||||
let color_locs = get_uniform_array_locations::<SPHERE_MAX>(
|
||||
&ctx, &program, "color_list", None
|
||||
);
|
||||
let resolution_loc = ctx.get_uniform_location(&program, "resolution");
|
||||
let shortdim_loc = ctx.get_uniform_location(&program, "shortdim");
|
||||
let opacity_loc = ctx.get_uniform_location(&program, "opacity");
|
||||
let highlight_loc = ctx.get_uniform_location(&program, "highlight");
|
||||
let layer_threshold_loc = ctx.get_uniform_location(&program, "layer_threshold");
|
||||
let debug_mode_loc = ctx.get_uniform_location(&program, "debug_mode");
|
||||
|
||||
// create a vertex array and bind it to the graphics context
|
||||
let vertex_array = ctx.create_vertex_array().unwrap();
|
||||
ctx.bind_vertex_array(Some(&vertex_array));
|
||||
|
||||
// set the vertex positions
|
||||
const VERTEX_CNT: usize = 6;
|
||||
let positions: [f32; 3*VERTEX_CNT] = [
|
||||
// northwest triangle
|
||||
-1.0, -1.0, 0.0,
|
||||
-1.0, 1.0, 0.0,
|
||||
1.0, 1.0, 0.0,
|
||||
// southeast triangle
|
||||
-1.0, -1.0, 0.0,
|
||||
1.0, 1.0, 0.0,
|
||||
1.0, -1.0, 0.0
|
||||
];
|
||||
bind_vertex_attrib(&ctx, position_index, 3, &positions);
|
||||
|
||||
// set up a repainting routine
|
||||
let (_, start_animation_loop, _) = create_raf(move || {
|
||||
// get the time step
|
||||
let time = performance.now();
|
||||
let time_step = 0.001*(time - last_time);
|
||||
last_time = time;
|
||||
|
||||
// get the navigation state
|
||||
let pitch_up_val = pitch_up.get();
|
||||
let pitch_down_val = pitch_down.get();
|
||||
let yaw_right_val = yaw_right.get();
|
||||
let yaw_left_val = yaw_left.get();
|
||||
let roll_ccw_val = roll_ccw.get();
|
||||
let roll_cw_val = roll_cw.get();
|
||||
let zoom_in_val = zoom_in.get();
|
||||
let zoom_out_val = zoom_out.get();
|
||||
let turntable_val = turntable.get();
|
||||
|
||||
// update the construction's orientation
|
||||
let ang_vel = {
|
||||
let pitch = pitch_up_val - pitch_down_val;
|
||||
let yaw = yaw_right_val - yaw_left_val;
|
||||
let roll = roll_ccw_val - roll_cw_val;
|
||||
let ang_vel_from_keyboard =
|
||||
if pitch != 0.0 || yaw != 0.0 || roll != 0.0 {
|
||||
ROT_SPEED * Vector3::new(-pitch, yaw, roll).normalize()
|
||||
} else {
|
||||
Vector3::zeros()
|
||||
};
|
||||
let ang_vel_from_turntable =
|
||||
if turntable_val {
|
||||
Vector3::new(0.0, TURNTABLE_SPEED, 0.0)
|
||||
} else {
|
||||
Vector3::zeros()
|
||||
};
|
||||
ang_vel_from_keyboard + ang_vel_from_turntable
|
||||
};
|
||||
let mut rotation_sp = rotation.fixed_view_mut::<3, 3>(0, 0);
|
||||
rotation_sp.copy_from(
|
||||
Rotation3::from_scaled_axis(time_step * ang_vel).matrix()
|
||||
);
|
||||
orientation = &rotation * &orientation;
|
||||
|
||||
// update the construction's location
|
||||
let zoom = zoom_out_val - zoom_in_val;
|
||||
location_z *= (time_step * ZOOM_SPEED * zoom).exp();
|
||||
|
||||
if scene_changed.get() {
|
||||
/* INSTRUMENTS */
|
||||
// measure mean frame interval
|
||||
frames_since_last_sample += 1;
|
||||
if frames_since_last_sample >= SAMPLE_PERIOD {
|
||||
mean_frame_interval.set((time - last_sample_time) / (SAMPLE_PERIOD as f64));
|
||||
last_sample_time = time;
|
||||
frames_since_last_sample = 0;
|
||||
}
|
||||
|
||||
// find the map from construction space to world space
|
||||
let location = {
|
||||
let u = -location_z;
|
||||
DMatrix::from_column_slice(5, 5, &[
|
||||
1.0, 0.0, 0.0, 0.0, 0.0,
|
||||
0.0, 1.0, 0.0, 0.0, 0.0,
|
||||
0.0, 0.0, 1.0, 0.0, u,
|
||||
0.0, 0.0, 2.0*u, 1.0, u*u,
|
||||
0.0, 0.0, 0.0, 0.0, 1.0
|
||||
])
|
||||
};
|
||||
let construction_to_world = &location * &orientation;
|
||||
|
||||
// update the construction
|
||||
sphere_vec.clear();
|
||||
color_vec.clear();
|
||||
match tab_selection.get() {
|
||||
Tab::GenTab => push_gen_construction(
|
||||
&mut sphere_vec,
|
||||
&mut color_vec,
|
||||
&construction_to_world,
|
||||
ctrl_x.get(), ctrl_y.get(),
|
||||
radius_x.get(), radius_y.get()
|
||||
),
|
||||
Tab::LowCurvTab => push_low_curv_construction(
|
||||
&mut sphere_vec,
|
||||
&mut color_vec,
|
||||
&construction_to_world,
|
||||
off1.get(), off2.get(), off3.get(),
|
||||
curv1.get(), curv2.get(), curv3.get(),
|
||||
)
|
||||
};
|
||||
|
||||
// set the resolution
|
||||
let width = canvas.width() as f32;
|
||||
let height = canvas.height() as f32;
|
||||
ctx.uniform2f(resolution_loc.as_ref(), width, height);
|
||||
ctx.uniform1f(shortdim_loc.as_ref(), width.min(height));
|
||||
|
||||
// pass the construction
|
||||
ctx.uniform1i(sphere_cnt_loc.as_ref(), sphere_vec.len() as i32);
|
||||
for n in 0..sphere_vec.len() {
|
||||
let v = &sphere_vec[n];
|
||||
ctx.uniform3f(
|
||||
sphere_sp_locs[n].as_ref(),
|
||||
v[0] as f32, v[1] as f32, v[2] as f32
|
||||
);
|
||||
ctx.uniform2f(
|
||||
sphere_lt_locs[n].as_ref(),
|
||||
v[3] as f32, v[4] as f32
|
||||
);
|
||||
ctx.uniform3fv_with_f32_array(
|
||||
color_locs[n].as_ref(),
|
||||
&color_vec[n]
|
||||
);
|
||||
}
|
||||
|
||||
// pass the control parameters
|
||||
ctx.uniform1f(opacity_loc.as_ref(), opacity.get() as f32);
|
||||
ctx.uniform1f(highlight_loc.as_ref(), highlight.get() as f32);
|
||||
ctx.uniform1i(layer_threshold_loc.as_ref(), layer_threshold.get() as i32);
|
||||
ctx.uniform1i(debug_mode_loc.as_ref(), debug_mode.get() as i32);
|
||||
|
||||
// draw the scene
|
||||
ctx.draw_arrays(WebGl2RenderingContext::TRIANGLES, 0, VERTEX_CNT as i32);
|
||||
|
||||
// clear scene change flag
|
||||
scene_changed.set(
|
||||
pitch_up_val != 0.0
|
||||
|| pitch_down_val != 0.0
|
||||
|| yaw_left_val != 0.0
|
||||
|| yaw_right_val != 0.0
|
||||
|| roll_cw_val != 0.0
|
||||
|| roll_ccw_val != 0.0
|
||||
|| zoom_in_val != 0.0
|
||||
|| zoom_out_val != 0.0
|
||||
|| turntable_val
|
||||
);
|
||||
} else {
|
||||
frames_since_last_sample = 0;
|
||||
mean_frame_interval.set(-1.0);
|
||||
}
|
||||
});
|
||||
start_animation_loop();
|
||||
});
|
||||
|
||||
let set_nav_signal = move |event: KeyboardEvent, value: f64| {
|
||||
let mut navigating = true;
|
||||
let shift = event.shift_key();
|
||||
match event.key().as_str() {
|
||||
"ArrowUp" if shift => zoom_in.set(value),
|
||||
"ArrowDown" if shift => zoom_out.set(value),
|
||||
"ArrowUp" => pitch_up.set(value),
|
||||
"ArrowDown" => pitch_down.set(value),
|
||||
"ArrowRight" if shift => roll_cw.set(value),
|
||||
"ArrowLeft" if shift => roll_ccw.set(value),
|
||||
"ArrowRight" => yaw_right.set(value),
|
||||
"ArrowLeft" => yaw_left.set(value),
|
||||
_ => navigating = false
|
||||
};
|
||||
if navigating {
|
||||
scene_changed.set(true);
|
||||
event.prevent_default();
|
||||
}
|
||||
};
|
||||
|
||||
view! {
|
||||
div(id="app") {
|
||||
div(class="tab-pane") {
|
||||
label {
|
||||
"General"
|
||||
input(
|
||||
type="radio",
|
||||
name="tab",
|
||||
prop:checked=tab_selection.get() == Tab::GenTab,
|
||||
on:click=move |_| tab_selection.set(Tab::GenTab)
|
||||
)
|
||||
}
|
||||
label {
|
||||
"Low curvature"
|
||||
input(
|
||||
type="radio",
|
||||
name="tab",
|
||||
prop:checked=tab_selection.get() == Tab::LowCurvTab,
|
||||
on:change=move |_| tab_selection.set(Tab::LowCurvTab)
|
||||
)
|
||||
}
|
||||
}
|
||||
div { "Mean frame interval: " (mean_frame_interval.get()) " ms" }
|
||||
canvas(
|
||||
ref=display,
|
||||
width=600,
|
||||
height=600,
|
||||
tabindex=0,
|
||||
on:keydown=move |event: KeyboardEvent| {
|
||||
if event.key() == "Shift" {
|
||||
roll_cw.set(yaw_right.get());
|
||||
roll_ccw.set(yaw_left.get());
|
||||
zoom_in.set(pitch_up.get());
|
||||
zoom_out.set(pitch_down.get());
|
||||
yaw_right.set(0.0);
|
||||
yaw_left.set(0.0);
|
||||
pitch_up.set(0.0);
|
||||
pitch_down.set(0.0);
|
||||
} else {
|
||||
set_nav_signal(event, 1.0);
|
||||
}
|
||||
},
|
||||
on:keyup=move |event: KeyboardEvent| {
|
||||
if event.key() == "Shift" {
|
||||
yaw_right.set(roll_cw.get());
|
||||
yaw_left.set(roll_ccw.get());
|
||||
pitch_up.set(zoom_in.get());
|
||||
pitch_down.set(zoom_out.get());
|
||||
roll_cw.set(0.0);
|
||||
roll_ccw.set(0.0);
|
||||
zoom_in.set(0.0);
|
||||
zoom_out.set(0.0);
|
||||
} else {
|
||||
set_nav_signal(event, 0.0);
|
||||
}
|
||||
},
|
||||
on:blur=move |_| {
|
||||
pitch_up.set(0.0);
|
||||
pitch_down.set(0.0);
|
||||
yaw_right.set(0.0);
|
||||
yaw_left.set(0.0);
|
||||
roll_ccw.set(0.0);
|
||||
roll_cw.set(0.0);
|
||||
}
|
||||
)
|
||||
div(ref=gen_controls) {
|
||||
label(class="control") {
|
||||
span { "Sphere 0 depth" }
|
||||
input(
|
||||
type="range",
|
||||
min=-1.0,
|
||||
max=1.0,
|
||||
step=0.001,
|
||||
bind:valueAsNumber=ctrl_x
|
||||
)
|
||||
}
|
||||
label(class="control") {
|
||||
span { "Sphere 1 depth" }
|
||||
input(
|
||||
type="range",
|
||||
min=-1.0,
|
||||
max=1.0,
|
||||
step=0.001,
|
||||
bind:valueAsNumber=ctrl_y
|
||||
)
|
||||
}
|
||||
label(class="control") {
|
||||
span { "Sphere 0 radius" }
|
||||
input(
|
||||
type="range",
|
||||
min=0.5,
|
||||
max=1.5,
|
||||
step=0.001,
|
||||
bind:valueAsNumber=radius_x
|
||||
)
|
||||
}
|
||||
label(class="control") {
|
||||
span { "Sphere 1 radius" }
|
||||
input(
|
||||
type="range",
|
||||
min=0.5,
|
||||
max=1.5,
|
||||
step=0.001,
|
||||
bind:valueAsNumber=radius_y
|
||||
)
|
||||
}
|
||||
}
|
||||
div(ref=low_curv_controls) {
|
||||
label(class="control") {
|
||||
span { "Sphere 1 offset" }
|
||||
input(
|
||||
type="range",
|
||||
min=-1.0,
|
||||
max=1.0,
|
||||
step=0.001,
|
||||
bind:valueAsNumber=off1
|
||||
)
|
||||
}
|
||||
label(class="control") {
|
||||
span { "Sphere 2 offset" }
|
||||
input(
|
||||
type="range",
|
||||
min=-1.0,
|
||||
max=1.0,
|
||||
step=0.001,
|
||||
bind:valueAsNumber=off2
|
||||
)
|
||||
}
|
||||
label(class="control") {
|
||||
span { "Sphere 3 offset" }
|
||||
input(
|
||||
type="range",
|
||||
min=-1.0,
|
||||
max=1.0,
|
||||
step=0.001,
|
||||
bind:valueAsNumber=off3
|
||||
)
|
||||
}
|
||||
label(class="control") {
|
||||
span { "Sphere 1 curvature" }
|
||||
input(
|
||||
type="range",
|
||||
min=0.0,
|
||||
max=2.0,
|
||||
step=0.001,
|
||||
bind:valueAsNumber=curv1
|
||||
)
|
||||
}
|
||||
label(class="control") {
|
||||
span { "Sphere 2 curvature" }
|
||||
input(
|
||||
type="range",
|
||||
min=0.0,
|
||||
max=2.0,
|
||||
step=0.001,
|
||||
bind:valueAsNumber=curv2
|
||||
)
|
||||
}
|
||||
label(class="control") {
|
||||
span { "Sphere 3 curvature" }
|
||||
input(
|
||||
type="range",
|
||||
min=0.0,
|
||||
max=2.0,
|
||||
step=0.001,
|
||||
bind:valueAsNumber=curv3
|
||||
)
|
||||
}
|
||||
}
|
||||
label(class="control") {
|
||||
span { "Opacity" }
|
||||
input(
|
||||
type="range",
|
||||
max=1.0,
|
||||
step=0.001,
|
||||
bind:valueAsNumber=opacity
|
||||
)
|
||||
}
|
||||
label(class="control") {
|
||||
span { "Highlight" }
|
||||
input(
|
||||
type="range",
|
||||
max=1.0,
|
||||
step=0.001,
|
||||
bind:valueAsNumber=highlight
|
||||
)
|
||||
}
|
||||
label(class="control") {
|
||||
span { "Turntable" }
|
||||
input(
|
||||
type="checkbox",
|
||||
bind:checked=turntable
|
||||
)
|
||||
}
|
||||
label(class="control") {
|
||||
span { "Layer threshold" }
|
||||
input(
|
||||
type="range",
|
||||
max=5.0,
|
||||
step=1.0,
|
||||
bind:valueAsNumber=layer_threshold
|
||||
)
|
||||
}
|
||||
label(class="control") {
|
||||
span { "Debug mode" }
|
||||
input(
|
||||
type="checkbox",
|
||||
bind:checked=debug_mode
|
||||
)
|
||||
}
|
||||
}
|
||||
}
|
||||
});
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user