Knife tool WIP

js/interface/actions.js

@@ -2062,6 +2062,7 @@ const BARS = {
 				'pivot_tool',
 				'vertex_snap_tool',
 				'stretch_tool',
+				'knife_tool',
 				'seam_tool',
 				'pan_tool',
 				'brush_tool',

js/modeling/mesh_editing.js

@@ -98,6 +98,54 @@ const ProportionalEdit = {
 	}
 }
 
+class KnifeToolContext {
+	/**
+	 * Click
+	 * Create point
+	 * Snap point to face or edge
+	 * Connect points with lines
+	 * Press something to apply
+	 * 
+	 * Iterate over faces
+	 * Remove former face, refill section between old edges and new edges
+	 */
+	constructor() {
+		this.meshes = [];
+		this.points = [];
+
+		this.points_geo = new THREE.BufferGeometry();
+		let points_material = new THREE.PointsMaterial({size: 7, sizeAttenuation: false, vertexColors: true});
+		this.points_mesh = new THREE.Points(this.points_geo, points_material);
+		this.lines_mesh = new THREE.Points(this.points_geo, points_material);
+
+		outline.add(points);
+	}
+	addPoint(data) {
+		if (data.element instanceof Mesh == false) return;
+		console.log(data);
+		this.meshes.safePush(data.element);
+	}
+	apply() {
+
+		Undo.initEdit({elements: this.meshes});
+
+
+		
+
+
+		Undo.finishEdit('Use knife tool');
+		this.remove();
+	}
+	discard() {
+		this.remove();
+	}
+	remove() {
+		Canvas.scene.remove(this.points_mesh);
+		Canvas.scene.remove(this.lines_mesh);
+		KnifeToolContext.current = null;
+	}
+	static current = null;
+}
 
 async function autoFixMeshEdit() {
 	let meshes = Mesh.selected;
@@ -1000,6 +1048,27 @@ BARS.defineActions(function() {
 			BarItems.view_mode.onChange();
 		}
 	})
+	new Tool('knife_tool', {
+		icon: 'surgical',
+		transformerMode: 'hidden',
+		category: 'tools',
+		selectElements: true,
+		modes: ['edit'],
+		condition: () => Modes.edit && Mesh.hasAny(),
+		onCanvasClick(data) {
+			if (!data) return;
+			if (!KnifeToolContext.current) KnifeToolContext.current = new KnifeToolContext();
+			let context = KnifeToolContext.current;
+			context.addPoint(data);
+		},
+		onSelect() {
+		},
+		onUnselect() {
+			if (KnifeToolContext.current) {
+				KnifeToolContext.current.apply();
+			}
+		}
+	})
 	new BarSelect('select_seam', {
 		options: {
 			auto: true,

lang/en.json

@@ -1183,6 +1183,8 @@
 	"action.rotate_tool.desc": "Tool to select and rotate elements",
 	"action.pivot_tool": "Pivot Tool",
 	"action.pivot_tool.desc": "Tool to change the pivot point of elements and bones",
+	"action.knife_tool": "Knife Tool",
+	"action.knife_tool.desc": "Tool to cut mesh faces into smaller pieces",
 	"action.seam_tool": "Seam Tool",
 	"action.seam_tool.desc": "Tool to define UV seams on mesh edges",
 	"action.pan_tool": "Pan Tool",