/**
 * 파티클 및 텍스처 Instanced 렌더링 쉐이더
 * Renderer.ts에서 자동 배칭(Auto-Batching)에 사용됩니다.
 */
export declare const instancedVertex = "\n  attribute vec2 position;\n  attribute vec2 uv;\n\n  // instanced attributes (4x4 Model Matrix split into 4 vec4s)\n  attribute vec4 instanceMat0;\n  attribute vec4 instanceMat1;\n  attribute vec4 instanceMat2;\n  attribute vec4 instanceMat3;\n  \n  // x: opacity, y: flipY\n  attribute vec2 instanceOpacityFlip;\n  \n  // x: uvOffsetX, y: uvOffsetY, z: uvScaleX, w: uvScaleY\n  attribute vec4 instanceUVParams;\n  \n  // x: TR, y: BR, z: TL, w: BL\n  attribute vec4 instanceBorderRadius;\n\n  uniform mat4 uViewMatrix;\n  uniform mat4 uProjectionMatrix;\n\n  varying vec2 vUV;\n  varying float vOpacity;\n  varying vec2 vSize;\n  varying vec4 vBorderRadius;\n  varying vec2 vLocalUV;\n\n  void main() {\n    float flipY = instanceOpacityFlip.y;\n    vec2 finalUV = uv;\n    if (flipY > 0.0) {\n      finalUV.y = 1.0 - finalUV.y;\n    }\n    \n    // UV Offset & Scale\n    vUV = finalUV * instanceUVParams.zw + instanceUVParams.xy;\n    vLocalUV = uv;\n    vOpacity = instanceOpacityFlip.x;\n    vBorderRadius = instanceBorderRadius;\n    \n    float w = length(instanceMat0.xyz);\n    float h = length(instanceMat1.xyz);\n    vSize = vec2(w, h);\n    \n    mat4 modelMat = mat4(\n      instanceMat0,\n      instanceMat1,\n      instanceMat2,\n      instanceMat3\n    );\n\n    vec4 worldPos = modelMat * vec4(position, 0.0, 1.0);\n    gl_Position = uProjectionMatrix * uViewMatrix * worldPos;\n  }\n";
export declare const instancedFragment = "\n  precision highp float;\n  uniform sampler2D uTexture;\n  varying vec2 vUV;\n  varying float vOpacity;\n  varying vec2 vSize;\n  varying vec4 vBorderRadius;\n  varying vec2 vLocalUV;\n\n  float sdRoundedBox(vec2 p, vec2 b, vec4 r) {\n    r.xy = (p.x > 0.0) ? r.xy : r.zw;\n    r.x  = (p.y > 0.0) ? r.x  : r.y;\n    vec2 q = abs(p) - b + r.x;\n    return min(max(q.x, q.y), 0.0) + length(max(q, 0.0)) - r.x;\n  }\n\n  void main() {\n    float maxRad = max(max(vBorderRadius.x, vBorderRadius.y), max(vBorderRadius.z, vBorderRadius.w));\n    if (maxRad > 0.0) {\n      vec2 p = (vLocalUV - 0.5) * vSize;\n      float d = sdRoundedBox(p, vSize * 0.5, vBorderRadius);\n      if (d > 0.0) discard;\n    }\n\n    vec4 color = texture2D(uTexture, vUV);\n    gl_FragColor = vec4(color.rgb * vOpacity, color.a * vOpacity);\n  }\n";