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edwinRNDRedwinRNDR
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Add SlugTextOnContour.kt
1 parent b67d051 commit 61a0e78

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Lines changed: 214 additions & 3 deletions

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‎orx-shapes/src/commonMain/kotlin/rectify/RectifiedContour.kt‎

Lines changed: 3 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -2,6 +2,7 @@ package org.openrndr.extra.shapes.rectify
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import org.openrndr.math.Matrix44
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import org.openrndr.math.Vector2
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import org.openrndr.math.YPolarity
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import org.openrndr.shape.ShapeContour
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import kotlin.math.floor
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@@ -24,12 +25,12 @@ class RectifiedContour(contour: ShapeContour, distanceTolerance: Double = 0.5, l
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}
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}
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fun pose(t: Double): Matrix44 {
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fun pose(t: Double, polarity: YPolarity = (originalPath as ShapeContour).polarity): Matrix44 {
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originalPath as ShapeContour
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return if (originalPath.empty) {
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Matrix44.IDENTITY
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} else {
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originalPath.pose(rectify(safe(t)))
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originalPath.pose(rectify(safe(t)), polarity)
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}
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}
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‎orx-text-on-contour/build.gradle.kts‎

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@@ -15,7 +15,9 @@ kotlin {
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val jvmDemo by getting {
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dependencies {
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implementation(openrndr.ffmpeg)
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implementation(project(":orx-text-on-contour"))
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implementation(project(":orx-camera"))
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}
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}
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}

‎orx-text-on-contour/src/commonMain/kotlin/SlugTextOnContour.kt‎

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package org.openrndr.extra.textoncontour
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import org.openrndr.color.ColorRGBa
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import org.openrndr.draw.Drawer
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import org.openrndr.draw.font.internal.ShapeResult
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import org.openrndr.draw.font.internal.TextShapingDriver
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import org.openrndr.draw.slug.SlugCommand
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import org.openrndr.draw.slug.SlugDrawer
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import org.openrndr.draw.slug.SlugGlyphMap
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import org.openrndr.draw.slug.StrokeMode
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import org.openrndr.draw.slug.TextSpan
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import org.openrndr.draw.slug.TextStyle
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import org.openrndr.extra.shapes.rectify.RectifiedContour
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import org.openrndr.math.Matrix44
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import org.openrndr.math.Vector4
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import org.openrndr.math.transforms.transform
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fun RectifiedContour.positionOnlyPose(t: Double): Matrix44 {
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return Matrix44.fromColumnVectors(Vector4.UNIT_X * -1.0, Vector4.UNIT_Y * -1.0, Vector4.UNIT_Z, position(t).xy01)
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}
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fun slugTextOnContour(
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drawer: Drawer,
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slugDrawer: SlugDrawer,
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slugGlyphMap: SlugGlyphMap,
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baseStyle: TextStyle,
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spans: List<TextSpan>,
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contour: RectifiedContour,
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startT: Double = 0.0
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) {
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val fixOrientation = Matrix44.fromColumnVectors(
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Vector4(-1.0, 0.0, 0.0, 0.0),
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Vector4(0.0, -1.0, 0.0, 0.0),
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Vector4.UNIT_Z,
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Vector4.UNIT_W
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)
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val shaper = TextShapingDriver.instance
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var textWidth = 0.0
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class WordInfo(val word: String, val width: Double, val shaped: List<ShapeResult>, val style: TextStyle)
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val items = mutableListOf<WordInfo>()
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for (span in spans) {
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val spanStyle = baseStyle.cascade(span.style)
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val face = spanStyle.face ?: error("face not set in span")
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val words = mutableListOf<String>()
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val currentWord = StringBuilder()
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for (ch in span.text) {
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when (ch) {
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' ', '\t' -> {
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if (currentWord.isNotEmpty()) {
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words.add(currentWord.toString())
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currentWord.clear()
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}
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words.add(" ")
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}
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'\n' -> {
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if (currentWord.isNotEmpty()) {
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words.add(currentWord.toString())
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currentWord.clear()
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}
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words.add("\n")
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}
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else -> {
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currentWord.append(ch)
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}
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}
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}
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if (currentWord.isNotEmpty()) {
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words.add(currentWord.toString())
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}
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val spaceGlyph = face.glyphForCharacter(' ')
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val spaceWidth = spaceGlyph.advanceWidth() * spanStyle.textWidthFactor!! * spanStyle.sizeInEm!!
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for (word in words) {
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when (word) {
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" ", "\t" -> {
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items.add(WordInfo(" ", spaceWidth, emptyList(), spanStyle))
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textWidth += spaceWidth
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}
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else -> {
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val features = spanStyle.features
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val shaped = shaper.shape(face, word, features)
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var wordWidth = 0.0
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for (sr in shaped) {
97+
wordWidth += sr.advance.x * spanStyle.textWidthFactor!! * spanStyle.sizeInEm!!
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}
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items.add(WordInfo(word, wordWidth, shaped, spanStyle))
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textWidth += wordWidth
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}
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}
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}
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var cursorT = startT
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val dt = 1.0 / contour.contour.length
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val commands = mutableListOf<SlugCommand>()
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for (item in items) {
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if (item.word == " ") {
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cursorT += item.width * dt
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} else {
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val itemTransform = transform {
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scale(item.style.sizeInEm!! * item.style.textWidthFactor!!, item.style.sizeInEm!!)
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}
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val hscale = item.style.sizeInEm!! * item.style.textWidthFactor!!
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for (shape in item.shaped) {
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val slugIndex = slugGlyphMap.getSlugForGlyphIndex(item.style.face!!, shape.glyphIndex)
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val t =
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if (contour.contour.closed) (cursorT + shape.offset.x * hscale * dt).mod(1.0) else cursorT + shape.offset.x * hscale * dt
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val pose =
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contour.pose(t) * itemTransform * fixOrientation
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val cmd = SlugCommand(
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slugIndex,
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pose,
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item.style.fill ?: ColorRGBa.TRANSPARENT,
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item.style.stroke ?: ColorRGBa.TRANSPARENT,
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strokeWeight = item.style.strokeWeight ?: 0.0,
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(item.style.strokeMode ?: StrokeMode.CENTER).mode
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)
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commands.add(cmd)
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cursorT += shape.advance.x * hscale * dt
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}
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}
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}
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slugDrawer.prepare(slugGlyphMap.slugMap, commands)
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slugDrawer.draw(drawer, slugGlyphMap.slugMap)
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}
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}

‎orx-text-on-contour/src/jvmDemo/kotlin/DemoSlugTextOnContour01.kt‎

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@@ -0,0 +1,63 @@
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import org.openrndr.application
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import org.openrndr.draw.ColorFormat
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import org.openrndr.draw.ColorType
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import org.openrndr.draw.MagnifyingFilter
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import org.openrndr.draw.MinifyingFilter
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import org.openrndr.draw.colorBuffer
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import org.openrndr.draw.font.loadFace
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import org.openrndr.draw.slug.SlugDrawer
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import org.openrndr.draw.slug.SlugGlyphMap
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import org.openrndr.draw.slug.SlugMap
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import org.openrndr.draw.slug.TextSpan
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import org.openrndr.draw.slug.TextStyle
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import org.openrndr.extra.camera.Camera2D
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import org.openrndr.extra.shapes.rectify.rectified
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import org.openrndr.extra.textoncontour.slugTextOnContour
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import org.openrndr.ffmpeg.ScreenRecorder
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import org.openrndr.shape.Circle
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import kotlin.math.PI
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import kotlin.math.cos
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/**
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* Demo Functionality includes:
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* - Loading and applying a specific font (`IBMPlexMono-Regular`) with a size of 32.0.
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* - Creating a circular contour at the center of the screen with a radius of 200.0.
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* - Rendering text along the rectified circle's contour.
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* - Offsetting text positions, enabling repeated text rendering along the same contour.
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*/
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fun main() = application {
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configure {
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width = 720
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height = 720
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}
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program {
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extend(ScreenRecorder()) {
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maximumDuration = 10.0
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frameRate = 60.0
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}
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val face = loadFace("demo-data/fonts/IBMPlexMono-Regular.ttf", 32.0, 1.0)
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val slugMap = SlugMap(
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colorBuffer(4096, 64, type = ColorType.FLOAT32, format = ColorFormat.RG),
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colorBuffer(4096, 64, type = ColorType.UINT16_INT, format = ColorFormat.RGBa)
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)
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slugMap.bands.filter(MinifyingFilter.LINEAR, MagnifyingFilter.LINEAR)
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val slugGlyphMap = SlugGlyphMap(slugMap)
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val slugDrawer = SlugDrawer()
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extend(Camera2D())
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extend {
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val c = Circle(drawer.bounds.center, 200.0).contour.rectified()
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var spans = listOf(TextSpan("The wheels of the bus go round and round.", TextStyle(textWidthFactor = 1.0, sizeInEm = 1.3)))
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spans = spans.flatMap { it.text.mapIndexed { index, c -> TextSpan(c.toString(), it.style!!.copy(textWidthFactor = cos(seconds * PI * 2.0 * 0.25 + index*0.1) * 0.4 + 0.6, sizeInEm = cos(seconds * PI * 4.0 * 0.5 + index*0.0465) * 0.4 + 1.4)) } }
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slugTextOnContour(drawer, slugDrawer, slugGlyphMap, TextStyle.Defaults.copy(face = face),
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spans, c, seconds * 0.5)
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}
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}
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}

‎orx-text-on-contour/src/jvmDemo/kotlin/DemoTextOnContour01.kt‎

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -21,7 +21,7 @@ fun main() = application {
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drawer.fontMap = loadFont("demo-data/fonts/IBMPlexMono-Regular.ttf", 32.0)
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val c = Circle(drawer.bounds.center, 200.0).contour.rectified()
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drawer.textOnContour("The wheels of the bus go round and round.", c)
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drawer.textOnContour("The wheels of the bus go round and round.", c, c.contour.length / 2.0)
24+
//drawer.textOnContour("The wheels of the bus go round and round.", c, c.contour.length / 2.0)
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}
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}
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}

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