SVG Graphics Geometry
Guide
css-matrix
Guide
css-matrix
  • Part 0. SVG 기초

    • SVG란 무엇인가
    • viewBox와 user space
    • transform attribute와 matrix
    • SVG 문서 구조와 기본 도형
  • Part 1. Path grammar

    • path d 명령어 — M, L, Z
    • H, V — 축 정렬 직선
    • C — cubic Bézier
    • Q — quadratic Bézier
    • S, T — smooth continuation
    • A — elliptical arc
    • path bounding box
  • Part 2. Stroke geometry

    • 점에서 stroke까지의 거리
    • join, cap, miter limit
    • stroke align과 outline 개념
    • miter length 공식
  • Part 3. Fill rules

    • nonzero vs evenodd
    • fill hit testing
  • Part 4. Path sampling

    • flatten tolerance
    • path length
    • point at length와 tangent
  • Part 5. Paint servers

    • linearGradient 좌표
    • clipPath와 mask 개념
  • Part 6. Path editor capstone

    • path handle 모델
    • handle hit testing
    • handle drag로 segment 갱신
    • mini path editor — SVG round-trip
  • Part 7. Fill & winding deep dive

    • winding vs ray casting
    • compound path — 여러 subpath
    • self-intersection
    • path boolean
    • fill vs stroke hit 우선순위
    • scanline parity
  • Part 8. Pattern & gradient

    • radialGradient
    • pattern tile
    • gradientUnits와 spreadMethod
  • Part 9. SVG filter & Figma effects

    • Figma DROP_SHADOW → SVG filter
    • filter chain 개요
    • blur · offset · merge
    • inner shadow
    • layer blur vs background blur
    • Figma effect 매핑표 전체
  • Part 10. Figma ↔ SVG bridge

    • vector network vs path d
    • fill · stroke export
    • boolean operations export
    • mask · clip export
  • Part 11. Icon design

    • pixel grid · optical alignment
    • fill vs stroke icons
    • symbol · sprite · currentColor
    • path simplification
  • Appendix A. SVG in CSS

    • currentColor · CSS theming
    • sprite data URI
    • SVG optimization pipeline
  • Appendix B. Engine extras

    • dash offset animation
    • adaptive flatten
    • arc → cubic 변환
    • multi-subpath editing
  • Part 12. Foundations primer

    • capability map
    • coordinate stack
  • Part 13. Figma ↔ SVG (deep)

    • Figma paint gap map
    • radial · angular gradient export
    • image · pattern fill
    • stroke align export
    • blend mode · layer opacity
  • Part 14. SVG spec breadth

    • markers — 화살표와 dash 끝
    • text · textPath
    • paint-order · opacity · filters
    • arc flatten 통합
  • Part 15. Curve calculus

    • de Casteljau subdivision
    • flatness와 chord error
    • 곡률 κ와 법선
    • arc center parameterization
    • G¹ smooth — S와 T
    • shoelace signed area
  • Part 16. Intersection & proximity

    • segment intersection
    • line ∩ cubic · curve ∩ curve
    • closest point on curve
  • Part 17. Offset curves

    • normal offset sampling
    • offset cusps
  • Part 18. Transform algebra

    • affine inverse & decompose
    • transform path vs group
  • Part 19. Rational curves

    • circle as cubic — κ constant
    • rational curves & exact arcs
  • Part 20. Tessellation & pixels

    • convex triangulation · ear clipping
    • evenodd parity → pixels
  • Part 21. Compositing math

    • Gaussian blur kernel
    • Porter–Duff & premultiplied α
  • Part 22. Math topic map

    • SVG 수학 주제 지도
  • Part 23. SVG animation

    • SMIL — animate 속성
    • SMIL — animateTransform
    • SMIL — animateMotion
    • stroke dash draw-on
    • CSS offset-path motion
    • path morph
    • JS motion along path
  • Part 24. Motion precision

    • uniform speed along path
    • cubic–cubic intersection
    • SVGPathElement length API
    • SMIL keyTimes & keySplines
    • degree elevation Q→C
  • Part 25. GPU mesh & WAAPI

    • triangulation with holes
    • WAAPI + SVG attributes
    • evenodd fill + triangle mesh

symbol · sprite · currentColor

한 번 정의한 path를 <symbol> + <use>로 재사용하고, CSS color로 tint합니다.

데모에서 볼 것

  • buildSvgSpriteSheet — hidden defs + star/heart symbols
  • 두 개 <use> 96×96
  • toolbar CSS color — uses.setAttribute("color", …)

readout: sprite markup + data URI length=… (svgMarkupToDataUri(sheet)).

buildSvgSymbol({
  id: "icon-star",
  content: '<path d="M 12 2 … Z"/>',
  attributes: currentColorAttributes("fill")
});
buildSvgSymbol({
  id: "icon-heart",
  content: '<path d="M 12 21 … Z"/>',
  attributes: currentColorAttributes("stroke")
});

API

import {
  buildSvgSymbol,
  buildSvgUse,
  buildSvgSpriteSheet,
  currentColorAttributes,
  svgMarkupToDataUri
} from "svg-matrix-core";

const symbols = [
  buildSvgSymbol({ id: "icon-home", viewBox: "0 0 24 24", content: pathMarkup }),
  …
];
const sheet = buildSvgSpriteSheet(symbols);           // hidden sprite
const sheetVisible = buildSvgSpriteSheet(symbols, { hidden: false });

const useMarkup = buildSvgUse({
  href: "#icon-home",
  x: 0, y: 0, width: 24, height: 24
});

currentColor

currentColorAttributes("fill");   // { fill: "currentColor" }
currentColorAttributes("stroke"); // { fill: "none", stroke: "currentColor" }
currentColorAttributes("both");
.icon { color: #2563eb; }  /* 자식 SVG가 상속 */

data URI

const uri = svgMarkupToDataUri(sheet);
// data:image/svg+xml,…  → [049](./lesson-049.md)

Core API

함수역할
buildSvgSymbol<symbol> 문자열
buildSvgUse<use href="#id">
buildSvgSpriteSheet<svg><symbol>…
currentColorAttributestint attrs
svgMarkupToDataUriCSS background

관련

  • 048 · 049 · 045

오늘의 핵심

스프라이트 = 한 번 정의 · N번 <use> + 테마는 currentColor 한 줄.

최근 수정: 26. 5. 17. PM 4:35
Contributors: jinho.park.s3, Cursor
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path simplification