260 lines
8.1 KiB
JavaScript
260 lines
8.1 KiB
JavaScript
'use strict'
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function Guide () {
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this.el = document.createElement('canvas')
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this.el.id = 'guide'
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this.el.width = 640
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this.el.height = 640
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this.el.style.width = '320px'
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this.el.style.height = '320px'
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this.show_extras = true
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this.scale = 2
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this.start = function () {
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this.clear()
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this.update()
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}
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this.update = function (force = false) {
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this.clear()
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this.el.getContext('2d').restore()
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this.draw_rulers()
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if (dotgrid.tool.index == 2) { this.draw_markers(); this.draw_vertices() }
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this.draw_path(new Generator(dotgrid.tool.layers[2], dotgrid.tool.styles[2]).toString({ x: 0, y: 0 }, this.scale), dotgrid.tool.styles[2])
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if (dotgrid.tool.index == 1) { this.draw_markers(); this.draw_vertices() }
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this.draw_path(new Generator(dotgrid.tool.layers[1], dotgrid.tool.styles[1]).toString({ x: 0, y: 0 }, this.scale), dotgrid.tool.styles[1])
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if (dotgrid.tool.index == 0) { this.draw_markers(); this.draw_vertices() }
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this.draw_path(new Generator(dotgrid.tool.layers[0], dotgrid.tool.styles[0]).toString({ x: 0, y: 0 }, this.scale), dotgrid.tool.styles[0])
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this.draw_handles()
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this.draw_translation()
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this.draw_cursor()
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this.draw_preview()
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}
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this.clear = function () {
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this.el.getContext('2d').clearRect(0, 0, this.el.width * this.scale, this.el.height * this.scale)
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}
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this.toggle = function () {
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this.show_extras = !this.show_extras
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this.update()
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}
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this.resize = function (size) {
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const offset = 15
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this.el.width = (size.width + offset) * this.scale
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this.el.height = (size.height + (offset * 2)) * this.scale
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this.el.style.width = (size.width + offset) + 'px'
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this.el.style.height = (size.height + (offset * 2)) + 'px'
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this.update()
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}
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this.draw_handles = function () {
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if (!this.show_extras) { return }
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for (const segment_id in dotgrid.tool.layer()) {
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const segment = dotgrid.tool.layer()[segment_id]
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for (const vertex_id in segment.vertices) {
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const vertex = segment.vertices[vertex_id]
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this.draw_handle(vertex)
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}
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}
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}
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this.draw_vertices = function () {
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for (const id in dotgrid.tool.vertices) {
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this.draw_vertex(dotgrid.tool.vertices[id])
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}
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}
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this.draw_markers = function () {
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if (!this.show_extras) { return }
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const cursor = { x: parseInt(dotgrid.cursor.pos.x / dotgrid.grid_width), y: parseInt(dotgrid.cursor.pos.y / dotgrid.grid_width) }
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for (let x = dotgrid.grid_x - 1; x >= 0; x--) {
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for (let y = dotgrid.grid_y; y >= 0; y--) {
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let is_step = x % dotgrid.block_x == 0 && y % dotgrid.block_y == 0
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// Color
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let color = is_step ? dotgrid.theme.active.b_med : dotgrid.theme.active.b_low
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if ((y == 0 || y == dotgrid.grid_y) && cursor.x == x + 1) { color = dotgrid.theme.active.b_high } else if ((x == 0 || x == dotgrid.grid_x - 1) && cursor.y == y + 1) { color = dotgrid.theme.active.b_high } else if (cursor.x == x + 1 && cursor.y == y + 1) { color = dotgrid.theme.active.b_high }
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this.draw_marker({
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x: parseInt(x * dotgrid.grid_width) + dotgrid.grid_width,
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y: parseInt(y * dotgrid.grid_height) + dotgrid.grid_height
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}, is_step ? 2.5 : 1.5, color)
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}
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}
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}
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this.draw_marker = function (pos, radius = 1, color) {
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let ctx = this.el.getContext('2d')
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ctx.beginPath()
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ctx.lineWidth = 2
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ctx.arc(pos.x * this.scale, pos.y * this.scale, radius, 0, 2 * Math.PI, false)
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ctx.fillStyle = color
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ctx.fill()
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ctx.closePath()
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}
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this.draw_vertex = function (pos, radius = 5) {
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let ctx = this.el.getContext('2d')
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ctx.beginPath()
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ctx.lineWidth = 2
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ctx.arc((pos.x * this.scale), (pos.y * this.scale), radius, 0, 2 * Math.PI, false)
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ctx.fillStyle = dotgrid.theme.active.f_med
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ctx.fill()
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ctx.closePath()
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}
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this.draw_rule = function (from, to) {
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let ctx = this.el.getContext('2d')
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ctx.beginPath()
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ctx.moveTo(from.x, from.y)
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ctx.lineTo(to.x, to.y)
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ctx.lineCap = 'round'
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ctx.lineWidth = 3
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ctx.strokeStyle = dotgrid.theme.active.b_low
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ctx.stroke()
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ctx.closePath()
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}
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this.draw_ruler = function (pos) {
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let offset = 15 * this.scale
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let top = offset
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let bottom = (dotgrid.tool.settings.size.height * this.scale) + offset
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let left = offset
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let right = (dotgrid.tool.settings.size.width * this.scale)
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// Translation
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this.draw_rule({ x: pos.x * this.scale, y: top }, { x: pos.x * this.scale, y: bottom })
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this.draw_rule({ x: left, y: pos.y * this.scale }, { x: right, y: pos.y * this.scale })
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}
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this.draw_rulers = function () {
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if (!dotgrid.cursor.translation) { return }
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let ctx = this.el.getContext('2d')
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this.draw_ruler(dotgrid.cursor.translation.to)
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ctx.setLineDash([])
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ctx.restore()
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}
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this.draw_handle = function (pos, radius = 6) {
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let ctx = this.el.getContext('2d')
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ctx.beginPath()
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ctx.lineWidth = 3
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ctx.lineCap = 'round'
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ctx.arc(Math.abs(pos.x * -this.scale), Math.abs(pos.y * this.scale), radius + 3, 0, 2 * Math.PI, false)
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ctx.fillStyle = dotgrid.theme.active.f_high
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ctx.fill()
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ctx.strokeStyle = dotgrid.theme.active.f_high
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ctx.stroke()
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ctx.closePath()
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ctx.beginPath()
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ctx.arc((pos.x * this.scale), (pos.y * this.scale), radius, 0, 2 * Math.PI, false)
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ctx.fillStyle = dotgrid.theme.active.f_low
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ctx.fill()
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ctx.closePath()
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ctx.beginPath()
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ctx.arc((pos.x * this.scale), (pos.y * this.scale), radius - 3, 0, 2 * Math.PI, false)
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ctx.fillStyle = dotgrid.theme.active.f_high
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ctx.fill()
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ctx.closePath()
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}
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this.draw_path = function (path, style) {
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let ctx = this.el.getContext('2d')
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let p = new Path2D(path)
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ctx.strokeStyle = style.color
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ctx.lineWidth = style.thickness * this.scale
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ctx.lineCap = style.strokeLinecap
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ctx.lineJoin = style.strokeLinejoin
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if (style.fill && style.fill != 'none') {
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ctx.fillStyle = style.color
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ctx.fill(p)
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}
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// Dash
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if (style.strokeLineDash) { ctx.setLineDash(style.strokeLineDash) } else { ctx.setLineDash([]) }
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ctx.stroke(p)
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}
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this.draw_translation = function () {
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if (!dotgrid.cursor.translation) { return }
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let ctx = this.el.getContext('2d')
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ctx.beginPath()
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ctx.moveTo((dotgrid.cursor.translation.from.x * this.scale), (dotgrid.cursor.translation.from.y * this.scale))
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ctx.lineTo((dotgrid.cursor.translation.to.x * this.scale), (dotgrid.cursor.translation.to.y * this.scale))
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ctx.lineCap = 'round'
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ctx.lineWidth = 5
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ctx.strokeStyle = dotgrid.theme.active.f_low
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ctx.setLineDash([5, 10])
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ctx.stroke()
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ctx.closePath()
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ctx.setLineDash([])
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ctx.restore()
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}
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this.draw_cursor = function (pos = dotgrid.cursor.pos, radius = dotgrid.tool.style().thickness - 1) {
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let ctx = this.el.getContext('2d')
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ctx.beginPath()
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ctx.lineWidth = 3
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ctx.lineCap = 'round'
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ctx.arc(Math.abs(pos.x * -this.scale), Math.abs(pos.y * this.scale), 5, 0, 2 * Math.PI, false)
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ctx.strokeStyle = dotgrid.theme.active.background
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ctx.stroke()
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ctx.closePath()
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ctx.beginPath()
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ctx.lineWidth = 3
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ctx.lineCap = 'round'
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ctx.arc(Math.abs(pos.x * -this.scale), Math.abs(pos.y * this.scale), clamp(radius, 5, 100), 0, 2 * Math.PI, false)
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ctx.strokeStyle = dotgrid.theme.active.f_med
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ctx.stroke()
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ctx.closePath()
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}
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this.draw_preview = function () {
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let ctx = this.el.getContext('2d')
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let operation = dotgrid.cursor.operation && dotgrid.cursor.operation.cast ? dotgrid.cursor.operation.cast : null
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if (!dotgrid.tool.can_cast(operation)) { return }
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if (operation == 'close') { return }
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let path = new Generator([{ vertices: dotgrid.tool.vertices, type: operation }]).toString({ x: 0, y: 0 }, 2)
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let style = {
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color: dotgrid.theme.active.f_med,
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thickness: 2,
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strokeLinecap: 'round',
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strokeLinejoin: 'round',
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strokeLineDash: [5, 15]
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}
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this.draw_path(path, style)
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ctx.setLineDash([])
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ctx.restore()
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}
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function pos_is_equal (a, b) { return a && b && Math.abs(a.x) == Math.abs(b.x) && Math.abs(a.y) == Math.abs(b.y) }
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function clamp (v, min, max) { return v < min ? min : v > max ? max : v }
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}
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