290 lines
9.4 KiB
TypeScript
290 lines
9.4 KiB
TypeScript
import { emitter, type GridEvent, type LevelNode, SlabNode, useScene } from '@pascal-app/core'
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import { useViewer } from '@pascal-app/viewer'
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import { useEffect, useMemo, useRef, useState } from 'react'
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import { BufferGeometry, DoubleSide, type Line, type Group, Shape, Vector3 } from 'three'
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import { EDITOR_LAYER } from '@/lib/constants'
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import { sfxEmitter } from '@/lib/sfx-bus'
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import { CursorSphere } from '../shared/cursor-sphere'
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const Y_OFFSET = 0.02
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/**
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* Snaps a point to the nearest axis-aligned or 45-degree diagonal from the last point
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*/
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const calculateSnapPoint = (
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lastPoint: [number, number],
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currentPoint: [number, number],
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): [number, number] => {
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const [x1, y1] = lastPoint
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const [x, y] = currentPoint
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const dx = x - x1
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const dy = y - y1
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const absDx = Math.abs(dx)
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const absDy = Math.abs(dy)
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// Calculate distances to horizontal, vertical, and diagonal lines
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const horizontalDist = absDy
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const verticalDist = absDx
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const diagonalDist = Math.abs(absDx - absDy)
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// Find the minimum distance to determine which axis to snap to
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const minDist = Math.min(horizontalDist, verticalDist, diagonalDist)
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if (minDist === diagonalDist) {
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// Snap to 45° diagonal
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const diagonalLength = Math.min(absDx, absDy)
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return [x1 + Math.sign(dx) * diagonalLength, y1 + Math.sign(dy) * diagonalLength]
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} else if (minDist === horizontalDist) {
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// Snap to horizontal
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return [x, y1]
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} else {
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// Snap to vertical
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return [x1, y]
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}
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}
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/**
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* Creates a slab with the given polygon points and returns its ID
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*/
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const commitSlabDrawing = (levelId: LevelNode['id'], points: Array<[number, number]>): string => {
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const { createNode, nodes } = useScene.getState()
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// Count existing slabs for naming
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const slabCount = Object.values(nodes).filter((n) => n.type === 'slab').length
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const name = `Slab ${slabCount + 1}`
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const slab = SlabNode.parse({
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name,
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polygon: points,
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})
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createNode(slab, levelId)
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sfxEmitter.emit('sfx:structure-build')
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return slab.id
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}
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export const SlabTool: React.FC = () => {
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const cursorRef = useRef<Group>(null)
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const mainLineRef = useRef<Line>(null!)
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const closingLineRef = useRef<Line>(null!)
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const currentLevelId = useViewer((state) => state.selection.levelId)
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const setSelection = useViewer((state) => state.setSelection)
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const [points, setPoints] = useState<Array<[number, number]>>([])
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const [cursorPosition, setCursorPosition] = useState<[number, number]>([0, 0])
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const [snappedCursorPosition, setSnappedCursorPosition] = useState<[number, number]>([0, 0])
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const [levelY, setLevelY] = useState(0)
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const previousSnappedPointRef = useRef<[number, number] | null>(null)
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const shiftPressed = useRef(false)
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// Update cursor position and lines on grid move
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useEffect(() => {
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if (!currentLevelId) return
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const onGridMove = (event: GridEvent) => {
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if (!cursorRef.current) return
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const gridX = Math.round(event.position[0] * 2) / 2
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const gridZ = Math.round(event.position[2] * 2) / 2
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const gridPosition: [number, number] = [gridX, gridZ]
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setCursorPosition(gridPosition)
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setLevelY(event.position[1])
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// Calculate snapped display position (bypass snap when Shift is held)
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const lastPoint = points[points.length - 1]
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const displayPoint = (shiftPressed.current || !lastPoint) ? gridPosition : calculateSnapPoint(lastPoint, gridPosition)
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setSnappedCursorPosition(displayPoint)
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// Play snap sound when the snapped position actually changes (only when drawing)
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if (points.length > 0 && previousSnappedPointRef.current &&
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(displayPoint[0] !== previousSnappedPointRef.current[0] || displayPoint[1] !== previousSnappedPointRef.current[1])) {
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sfxEmitter.emit('sfx:grid-snap')
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}
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previousSnappedPointRef.current = displayPoint
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cursorRef.current.position.set(displayPoint[0], event.position[1], displayPoint[1])
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}
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const onGridClick = (_event: GridEvent) => {
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if (!currentLevelId) return
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// Use the last displayed snapped position (respects Shift state from onGridMove)
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const clickPoint = previousSnappedPointRef.current ?? cursorPosition
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// Check if clicking on the first point to close the shape
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const firstPoint = points[0]
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if (
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points.length >= 3 &&
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firstPoint &&
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Math.abs(clickPoint[0] - firstPoint[0]) < 0.25 &&
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Math.abs(clickPoint[1] - firstPoint[1]) < 0.25
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) {
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// Create the slab and select it
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const slabId = commitSlabDrawing(currentLevelId, points)
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setSelection({ selectedIds: [slabId] })
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setPoints([])
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} else {
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// Add point to polygon
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setPoints([...points, clickPoint])
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}
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}
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const onGridDoubleClick = (_event: GridEvent) => {
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if (!currentLevelId) return
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// Need at least 3 points to form a polygon
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if (points.length >= 3) {
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const slabId = commitSlabDrawing(currentLevelId, points)
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setSelection({ selectedIds: [slabId] })
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setPoints([])
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}
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}
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const onCancel = () => {
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setPoints([])
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}
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const onKeyDown = (e: KeyboardEvent) => { if (e.key === 'Shift') shiftPressed.current = true }
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const onKeyUp = (e: KeyboardEvent) => { if (e.key === 'Shift') shiftPressed.current = false }
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document.addEventListener('keydown', onKeyDown)
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document.addEventListener('keyup', onKeyUp)
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emitter.on('grid:move', onGridMove)
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emitter.on('grid:click', onGridClick)
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emitter.on('grid:double-click', onGridDoubleClick)
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emitter.on('tool:cancel', onCancel)
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return () => {
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document.removeEventListener('keydown', onKeyDown)
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document.removeEventListener('keyup', onKeyUp)
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emitter.off('grid:move', onGridMove)
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emitter.off('grid:click', onGridClick)
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emitter.off('grid:double-click', onGridDoubleClick)
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emitter.off('tool:cancel', onCancel)
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}
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}, [currentLevelId, points, cursorPosition, setSelection])
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// Update line geometries when points change
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useEffect(() => {
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if (!mainLineRef.current || !closingLineRef.current) return
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if (points.length === 0) {
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mainLineRef.current.visible = false
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closingLineRef.current.visible = false
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return
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}
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const y = levelY + Y_OFFSET
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const snappedCursor = snappedCursorPosition
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// Build main line points
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const linePoints: Vector3[] = points.map(([x, z]) => new Vector3(x, y, z))
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linePoints.push(new Vector3(snappedCursor[0], y, snappedCursor[1]))
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// Update main line
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if (linePoints.length >= 2) {
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mainLineRef.current.geometry.dispose()
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mainLineRef.current.geometry = new BufferGeometry().setFromPoints(linePoints)
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mainLineRef.current.visible = true
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} else {
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mainLineRef.current.visible = false
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}
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// Update closing line (from cursor back to first point)
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const firstPoint = points[0]
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if (points.length >= 2 && firstPoint) {
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const closingPoints = [
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new Vector3(snappedCursor[0], y, snappedCursor[1]),
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new Vector3(firstPoint[0], y, firstPoint[1]),
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]
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closingLineRef.current.geometry.dispose()
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closingLineRef.current.geometry = new BufferGeometry().setFromPoints(closingPoints)
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closingLineRef.current.visible = true
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} else {
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closingLineRef.current.visible = false
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}
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}, [points, snappedCursorPosition, levelY])
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// Create preview shape when we have 3+ points
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const previewShape = useMemo(() => {
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if (points.length < 3) return null
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const snappedCursor = snappedCursorPosition
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const allPoints = [...points, snappedCursor]
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// THREE.Shape is in X-Y plane. After rotation of -PI/2 around X:
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// - Shape X -> World X
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// - Shape Y -> World -Z (so we negate Z to get correct orientation)
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const firstPt = allPoints[0]
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if (!firstPt) return null
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const shape = new Shape()
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shape.moveTo(firstPt[0], -firstPt[1])
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for (let i = 1; i < allPoints.length; i++) {
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const pt = allPoints[i]
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if (pt) {
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shape.lineTo(pt[0], -pt[1])
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}
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}
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shape.closePath()
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return shape
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}, [points, snappedCursorPosition])
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return (
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<group>
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{/* Cursor */}
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<CursorSphere ref={cursorRef} />
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{/* Preview fill */}
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{previewShape && (
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<mesh
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frustumCulled={false}
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layers={EDITOR_LAYER}
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position={[0, levelY + Y_OFFSET, 0]}
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rotation={[-Math.PI / 2, 0, 0]}
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>
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<shapeGeometry args={[previewShape]} />
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<meshBasicMaterial
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color="#818cf8"
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depthTest={false}
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opacity={0.15}
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side={DoubleSide}
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transparent
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/>
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</mesh>
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)}
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{/* Main line */}
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{/* @ts-ignore */}
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<line ref={mainLineRef} frustumCulled={false} renderOrder={1} visible={false} layers={EDITOR_LAYER}>
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<bufferGeometry />
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<lineBasicNodeMaterial color="#818cf8" linewidth={3} depthTest={false} depthWrite={false} />
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</line>
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{/* Closing line */}
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{/* @ts-ignore */}
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<line ref={closingLineRef} frustumCulled={false} renderOrder={1} visible={false} layers={EDITOR_LAYER}>
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<bufferGeometry />
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<lineBasicNodeMaterial
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color="#818cf8"
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linewidth={2}
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depthTest={false}
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depthWrite={false}
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opacity={0.5}
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transparent
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/>
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</line>
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{/* Point markers */}
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{points.map(([x, z], index) => (
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<CursorSphere key={index} position={[x, levelY + Y_OFFSET + 0.01, z]} color="#818cf8" showTooltip={false} height={0} />
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))}
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</group>
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)
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}
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