代码优化

src/kde-heatmap.js

@@ -92,7 +92,9 @@ function getHeatColor(density) {
     // 低密度：浅绿色
     const green = Math.round(200 + 55 * intensity);
     const blue = Math.round(50 + 100 * intensity);
-    return `rgba(${Math.round(50 * intensity)}, ${green}, ${blue}, ${alpha * 0.7})`;
+    return `rgba(${Math.round(50 * intensity)}, ${green}, ${blue}, ${
+      alpha * 0.7
+    })`;
   } else {
     // 高密度：深绿色
     const red = Math.round(50 * (intensity - 0.5) * 2);
@@ -120,7 +122,6 @@ export function drawKDEHeatmap(canvasId, width, height, points, options = {}) {
     pointColor = "rgba(255, 255, 255, 0.9)",
   } = options;
 
-  // #ifdef MP-WEIXIN
   // 微信小程序使用 Canvas 2D
   return new Promise((resolve, reject) => {
     try {
@@ -197,67 +198,6 @@ export function drawKDEHeatmap(canvasId, width, height, points, options = {}) {
       reject(error);
     }
   });
-  // #endif
-
-  // #ifndef MP-WEIXIN
-  // 其他平台沿用旧版绘制上下文
-  return new Promise((resolve, reject) => {
-    try {
-      const ctx = uni.createCanvasContext(canvasId);
-      ctx.clearRect(0, 0, width, height);
-
-      if (!points || points.length === 0) {
-        ctx.draw(false, () => resolve());
-        return;
-      }
-
-      const kernel = kernelEpanechnikov(bandwidth);
-      const kde = kernelDensityEstimator(kernel, range, gridSize);
-      const densityData = kde(points);
-
-      const cellWidth = width / gridSize;
-      const cellHeight = height / gridSize;
-      const xRange = range[1] - range[0];
-      const yRange = range[1] - range[0];
-
-      densityData.forEach(([x, y, density]) => {
-        const normalizedX = (x - range[0]) / xRange;
-        const normalizedY = (y - range[0]) / yRange;
-        const canvasX = normalizedX * width;
-        const canvasY = normalizedY * height;
-
-        const color = getHeatColor(density);
-        ctx.setFillStyle(color);
-        ctx.beginPath();
-        ctx.arc(
-          canvasX,
-          canvasY,
-          Math.min(cellWidth, cellHeight) * 0.6,
-          0,
-          2 * Math.PI
-        );
-        ctx.fill();
-      });
-
-      if (showPoints) {
-        ctx.setFillStyle(pointColor);
-        points.forEach(([x, y]) => {
-          const normalizedX = (x - range[0]) / xRange;
-          const normalizedY = (y - range[0]) / yRange;
-          const canvasX = normalizedX * width;
-          const canvasY = normalizedY * height;
-          ctx.beginPath();
-          ctx.arc(canvasX, canvasY, 2.5, 0, 2 * Math.PI);
-          ctx.fill();
-        });
-      }
-
-      ctx.draw(false, () => resolve());
-    } catch (error) {
-      reject(error);
-    }
-  });
-  // #endif
 }
 
 /**
@@ -271,7 +211,6 @@ export function generateKDEHeatmapImage(
   points,
   options = {}
 ) {
-  // #ifdef MP-WEIXIN
   // Canvas 2D 导出（传入 canvas 对象）
   return new Promise((resolve, reject) => {
     drawKDEHeatmap(canvasId, width, height, points, options)
@@ -301,26 +240,6 @@ export function generateKDEHeatmapImage(
       })
       .catch(reject);
   });
-  // #endif
-
-  // #ifndef MP-WEIXIN
-  // 旧版导出（使用 canvasId）
-  return new Promise((resolve, reject) => {
-    drawKDEHeatmap(canvasId, width, height, points, options)
-      .then(() => {
-        uni.canvasToTempFilePath({
-          canvasId,
-          width,
-          height,
-          destWidth: width * 3,
-          destHeight: height * 3,
-          success: (res) => resolve(res.tempFilePath),
-          fail: reject,
-        });
-      })
-      .catch(reject);
-  });
-  // #endif
 }
 
 export const generateHeatMapData = (width, height, amount = 100) => {