/**
 * Point Shader - WGSL for WebGPU
 *
 * Renders scatter points with SDF-based symbols.
 * Supports: circle, square, diamond, triangle, triangleDown, cross, x, star
 */
export declare const POINT_SHADER_WGSL = "\n// Uniform buffer for transforms, color, point properties\nstruct Uniforms {\n  scale: vec2<f32>,\n  translate: vec2<f32>,\n  color: vec4<f32>,\n  pointSize: f32,\n  symbol: i32, // 0=circle, 1=square, 2=diamond, 3=triangle, 4=triangleDown, 5=cross, 6=x, 7=star\n  _padding: vec2<f32>,\n};\n\n@group(0) @binding(0)\nvar<uniform> uniforms: Uniforms;\n\nstruct VSInput {\n  @location(0) position: vec2<f32>,\n};\n\nstruct VSOutput {\n  @builtin(position) pos: vec4<f32>,\n  @location(0) @interpolate(flat) pointSize: f32,\n  @location(1) @interpolate(flat) symbol: i32,\n};\n\n@vertex\nfn vs_main(in: VSInput, @builtin(vertex_index) vertexIndex: u32) -> VSOutput {\n  var out: VSOutput;\n  let transformed = in.position * uniforms.scale + uniforms.translate;\n  out.pos = vec4<f32>(transformed, 0.0, 1.0);\n  out.pointSize = uniforms.pointSize;\n  out.symbol = uniforms.symbol;\n  return out;\n}\n\n// SDF functions for symbols\nfn sdCircle(p: vec2<f32>, r: f32) -> f32 {\n  return length(p) - r;\n}\n\nfn sdBox(p: vec2<f32>, b: vec2<f32>) -> f32 {\n  let d = abs(p) - b;\n  return length(max(d, vec2<f32>(0.0))) + min(max(d.x, d.y), 0.0);\n}\n\nfn sdDiamond(p: vec2<f32>, r: f32) -> f32 {\n  return (abs(p.x) + abs(p.y)) - r;\n}\n\nfn sdTriangle(p_in: vec2<f32>, r: f32) -> f32 {\n  let k = sqrt(3.0);\n  var p = p_in;\n  p.x = abs(p.x) - r;\n  p.y = p.y + r / k;\n  if (p.x + k * p.y > 0.0) {\n    p = vec2<f32>(p.x - k * p.y, -k * p.x - p.y) / 2.0;\n  }\n  p.x = p.x - clamp(p.x, -2.0 * r, 0.0);\n  return -length(p) * sign(p.y);\n}\n\nfn sdCross(p: vec2<f32>, r: f32, thickness: f32) -> f32 {\n  let d = abs(p);\n  let s1 = sdBox(d, vec2<f32>(r, thickness));\n  let s2 = sdBox(d, vec2<f32>(thickness, r));\n  return min(s1, s2);\n}\n\nfn sdX(p: vec2<f32>, r: f32, thickness: f32) -> f32 {\n  let c = cos(0.785398);\n  let s = sin(0.785398);\n  let m = mat2x2<f32>(c, -s, s, c);\n  return sdCross(m * p, r, thickness);\n}\n\nfn sdStar(p_in: vec2<f32>, r: f32, rf: f32) -> f32 {\n  let k1 = vec2<f32>(0.80901699, -0.58778525);\n  let k2 = vec2<f32>(-k1.x, k1.y);\n  var p = p_in;\n  p.x = abs(p.x);\n  p = p - 2.0 * max(dot(k1, p), 0.0) * k1;\n  p = p - 2.0 * max(dot(k2, p), 0.0) * k2;\n  p.x = abs(p.x);\n  p.y = p.y - r;\n  let ba = rf * vec2<f32>(-k1.y, k1.x) - vec2<f32>(0.0, 1.0);\n  let h = clamp(dot(p, ba) / dot(ba, ba), 0.0, r);\n  return length(p - ba * h) * sign(p.y * ba.x - p.x * ba.y);\n}\n\n@fragment\nfn fs_main(in: VSOutput) -> @location(0) vec4<f32> {\n  // Note: WebGPU doesn't have gl_PointCoord directly\n  // Points in WebGPU require rendering quads instead\n  // This shader needs instanced rendering with quads for proper point rendering\n  // For now, return the color directly\n  return uniforms.color;\n}\n";
export declare const POINT_QUAD_SHADER_WGSL = "\n// Uniform buffer for transforms, color, point properties\nstruct Uniforms {\n  scale: vec2<f32>,\n  translate: vec2<f32>,\n  color: vec4<f32>,\n  pointSize: f32,\n  symbol: i32,\n  viewport: vec2<f32>, // viewport dimensions for proper sizing\n};\n\n@group(0) @binding(0)\nvar<uniform> uniforms: Uniforms;\n\nstruct VSInput {\n  @location(0) position: vec2<f32>,  // point center position\n  @location(1) quadOffset: vec2<f32>, // quad vertex offset (-1 to 1)\n};\n\nstruct VSOutput {\n  @builtin(position) pos: vec4<f32>,\n  @location(0) uv: vec2<f32>, // -0.5 to 0.5 for SDF\n};\n\n@vertex\nfn vs_main(in: VSInput) -> VSOutput {\n  var out: VSOutput;\n  \n  // Transform point position to NDC\n  let transformed = in.position * uniforms.scale + uniforms.translate;\n  \n  // Calculate point size in NDC\n  let pointSizeNDC = vec2<f32>(\n    uniforms.pointSize / uniforms.viewport.x * 2.0,\n    uniforms.pointSize / uniforms.viewport.y * 2.0\n  );\n  \n  // Apply quad offset\n  let offset = in.quadOffset * pointSizeNDC * 0.5;\n  \n  out.pos = vec4<f32>(transformed + offset, 0.0, 1.0);\n  out.uv = in.quadOffset * 0.5; // -0.5 to 0.5\n  \n  return out;\n}\n\n// SDF functions\nfn sdCircle(p: vec2<f32>, r: f32) -> f32 {\n  return length(p) - r;\n}\n\nfn sdBox(p: vec2<f32>, b: vec2<f32>) -> f32 {\n  let d = abs(p) - b;\n  return length(max(d, vec2<f32>(0.0))) + min(max(d.x, d.y), 0.0);\n}\n\nfn sdDiamond(p: vec2<f32>, r: f32) -> f32 {\n  return (abs(p.x) + abs(p.y)) - r;\n}\n\nfn sdTriangle(p_in: vec2<f32>, r: f32) -> f32 {\n  let k = sqrt(3.0);\n  var p = p_in;\n  p.x = abs(p.x) - r;\n  p.y = p.y + r / k;\n  if (p.x + k * p.y > 0.0) {\n    p = vec2<f32>(p.x - k * p.y, -k * p.x - p.y) / 2.0;\n  }\n  p.x = p.x - clamp(p.x, -2.0 * r, 0.0);\n  return -length(p) * sign(p.y);\n}\n\nfn sdCross(p: vec2<f32>, r: f32, thickness: f32) -> f32 {\n  let d = abs(p);\n  let s1 = sdBox(d, vec2<f32>(r, thickness));\n  let s2 = sdBox(d, vec2<f32>(thickness, r));\n  return min(s1, s2);\n}\n\nfn sdX(p: vec2<f32>, r: f32, thickness: f32) -> f32 {\n  let c = cos(0.785398);\n  let s = sin(0.785398);\n  let m = mat2x2<f32>(c, -s, s, c);\n  return sdCross(m * p, r, thickness);\n}\n\nfn sdStar(p_in: vec2<f32>, r: f32, rf: f32) -> f32 {\n  let k1 = vec2<f32>(0.80901699, -0.58778525);\n  let k2 = vec2<f32>(-k1.x, k1.y);\n  var p = p_in;\n  p.x = abs(p.x);\n  p = p - 2.0 * max(dot(k1, p), 0.0) * k1;\n  p = p - 2.0 * max(dot(k2, p), 0.0) * k2;\n  p.x = abs(p.x);\n  p.y = p.y - r;\n  let ba = rf * vec2<f32>(-k1.y, k1.x) - vec2<f32>(0.0, 1.0);\n  let h = clamp(dot(p, ba) / dot(ba, ba), 0.0, r);\n  return length(p - ba * h) * sign(p.y * ba.x - p.x * ba.y);\n}\n\n@fragment\nfn fs_main(in: VSOutput) -> @location(0) vec4<f32> {\n  var d: f32 = 0.0;\n  \n  if (uniforms.symbol == 0) {\n    d = sdCircle(in.uv, 0.45);\n  } else if (uniforms.symbol == 1) {\n    d = sdBox(in.uv, vec2<f32>(0.35));\n  } else if (uniforms.symbol == 2) {\n    d = sdDiamond(in.uv, 0.45);\n  } else if (uniforms.symbol == 3) {\n    d = sdTriangle(vec2<f32>(in.uv.x, in.uv.y + 0.1), 0.4);\n  } else if (uniforms.symbol == 4) {\n    d = sdTriangle(vec2<f32>(in.uv.x, -in.uv.y + 0.1), 0.4);\n  } else if (uniforms.symbol == 5) {\n    d = sdCross(in.uv, 0.45, 0.15);\n  } else if (uniforms.symbol == 6) {\n    d = sdX(in.uv, 0.45, 0.15);\n  } else if (uniforms.symbol == 7) {\n    d = sdStar(in.uv, 0.45, 0.4);\n  }\n  \n  if (d > 0.02) {\n    discard;\n  }\n  \n  let alpha = 1.0 - smoothstep(0.0, 0.02, d);\n  return vec4<f32>(uniforms.color.rgb, uniforms.color.a * alpha);\n}\n";
export declare const POINT_VERTEX_STRIDE: number;