From 6d79e9c91aa61d2b1c61777baad9f2cfa06769d9 Mon Sep 17 00:00:00 2001
From: Stewart Allen <sa@grid.space>
Date: Sat, 15 Jan 2022 13:47:03 -0500
Subject: [PATCH] wire up split plane visualization and selection

---
 src/main/mesh.js   | 73 +++++++++++++++++++++++++++++++++++++++++++++-
 src/mesh/api.js    |  4 ---
 src/mesh/build.js  |  3 +-
 web/mesh/index.css | 27 +++++++----------
 4 files changed, 84 insertions(+), 23 deletions(-)

diff --git a/src/main/mesh.js b/src/main/mesh.js
index 4d2edd41..a588d451 100644
--- a/src/main/mesh.js
+++ b/src/main/mesh.js
@@ -8,7 +8,7 @@ let broker = gapp.broker;
 let call = broker.send;
 let dbindex = [ "admin", "space" ];
 let worker = moto.client.fn;
-let { Quaternion, Vector3 } = THREE;
+let { Quaternion, Vector3, Mesh, MeshPhongMaterial, PlaneGeometry, DoubleSide } = THREE;
 
 // set below. called once the DOM readyState = complete
 // this is the main() entrypoint called after all dependents load
@@ -129,6 +129,72 @@ function restore_space() {
     $d('curtain','none');
 }
 
+// toggle edit/split temporary mode (present plane on hover)
+let temp_mode;
+
+// split functions
+let split = {
+    start() {
+        let space = moto.Space;
+        let { api, util } = mesh;
+        // highlight button
+        let button = event.target;
+        button.classList.add('selected');
+        // create split plane visual
+        let geo, mat, obj = new Mesh(
+            geo = new PlaneGeometry(1,1),
+            mat = new MeshPhongMaterial({
+                side: DoubleSide,
+                color: 0x999999,
+                transparent: false,
+                opacity: 0.1
+            })
+        );
+        space.scene.add(obj);
+        // enable temp mode
+        let state = split.state = { button, obj };
+        // for split and lay flat modes
+        space.mouse.onHover((int, event, ints) => {
+            if (!event) {
+                return api.objects();
+            }
+            let { button, buttons } = event;
+            if (buttons) {
+                return;
+            }
+            let { dim, mid } = util.bounds(int.object);
+            let { x, y, z } = int.point;
+            state.point = { x, y, z };
+            obj.scale.set(dim.x, dim.y, 1);
+            obj.position.set(mid.x, y, mid.y);
+        });
+        temp_mode = split;
+    },
+
+    select() {
+        // select plane (also exec)
+        console.log({select_plane: split.state});
+        split.end();
+    },
+
+    end() {
+        let space = moto.Space;
+        let { button, obj } = split.state;
+        button.classList.remove('selected');
+        space.scene.remove(obj);
+        space.mouse.onHover(undefined);
+        temp_mode = split.state = undefined;
+    }
+}
+
+function edit_split(event) {
+    if (temp_mode) {
+        temp_mode.end();
+    } else {
+        split.start();
+    }
+}
+
 // add space event bindings
 function space_init(data) {
     let { space, platform } = data;
@@ -219,6 +285,7 @@ function space_init(data) {
                     break;
                 case 'Escape':
                     selection.clear();
+                    temp_mode && temp_mode.end();
                     estop(evt);
                     break;
                 case 'Backspace':
@@ -273,6 +340,9 @@ function space_init(data) {
     space.mouse.upSelect((int, event) => {
         if (event && event.target.nodeName === "CANVAS") {
             let model = int && int.object.model ? int.object.model : undefined;
+            if (temp_mode) {
+                return temp_mode.select(model);
+            }
             if (model) {
                 let group = model.group;
                 let { ctrlKey, metaKey, shiftKey } = event;
@@ -360,6 +430,7 @@ broker.listeners({
     space_load,
     object_matrix,
     object_destroy,
+    edit_split
 });
 
 // remove version cache bust from url
diff --git a/src/mesh/api.js b/src/mesh/api.js
index 71008ab9..6c9b2bd9 100644
--- a/src/mesh/api.js
+++ b/src/mesh/api.js
@@ -307,10 +307,6 @@ let tool = {
         });
     },
 
-    split(models) {
-        models = fallback(models);
-    },
-
     duplicate() {
         for (let m of selection.models()) {
             m.duplicate();
diff --git a/src/mesh/build.js b/src/mesh/build.js
index fd6ec96b..e895d85a 100644
--- a/src/mesh/build.js
+++ b/src/mesh/build.js
@@ -14,6 +14,7 @@ let mesh = self.mesh = self.mesh || {};
 if (mesh.build) return;
 
 let broker = gapp.broker;
+let call = broker.send;
 let { api, util } = mesh;
 
 broker.listeners({
@@ -250,7 +251,7 @@ function ui_build() {
             // h.div({ class: "vsep" }),
             h.button({ _: 'duplicate', onclick: tool.duplicate }),
             h.button({ _: 'merge', onclick: tool.merge }),
-            h.button({ _: 'split', onclick: tool.split }),
+            h.button({ _: 'split', onclick: call.edit_split }),
             h.button({ _: 'invert', onclick: tool.invert }),
         ]),
         h.div([
diff --git a/web/mesh/index.css b/web/mesh/index.css
index a63324cd..e7bf291c 100644
--- a/web/mesh/index.css
+++ b/web/mesh/index.css
@@ -140,6 +140,7 @@ button {
     padding: 2px 3px 2px 3px;
     border: 1px solid rgba(150,150,150,0.5);
     background-color: rgba(220,220,220,0.75);
+    user-select: none;
     outline: none;
 }
 
@@ -276,7 +277,7 @@ button:hover {
     will-change: transform;
 }
 
-/** common child look & feel */
+/** common look & feel */
 
 #logger, #modal_frame, #actions > div, #grouplist > div {
     border: 1px solid gray;
@@ -291,6 +292,14 @@ button:hover {
     border-bottom: 1px dashed gray;
 }
 
+button.selected {
+    background-color: rgba(0,255,0,0.5);
+}
+
+button.selected:hover {
+    background-color: rgba(0,255,0,1);
+}
+
 /** modes menu top/center **/
 
 #modes {
@@ -307,14 +316,6 @@ button:hover {
     gap: 2px;
 }
 
-#modes button.selected {
-    background-color: rgba(0,255,0,0.5);
-}
-
-#modes button.selected:hover {
-    background-color: rgba(0,255,0,1);
-}
-
 #mode-line, #mode-vertex {
     display: none;
 }
@@ -416,14 +417,6 @@ button:hover {
     text-align: left;
 }
 
-#grouplist .selected {
-    background-color: rgba(0,255,0,0.5)
-}
-
-#grouplist .selected:hover {
-    background-color: rgba(0,255,0,1)
-}
-
 #grouplist .hidden {
     background-color: rgba(0,0,255,0.2);
 }