radialGradient

중심·초점·반경으로 t를 구하고 색을 샘플링합니다.

핵심

• sampleRadialGradient
• fx/fy focal
• 019 linear과 짝

Core API

sampleRadialGradient, sampleLinearGradient, patternTileCoordinates, applySpreadMethod, interpolateColorStops