fix(text): demo

demos/point.html

@@ -63,7 +63,7 @@
      })
     .shape('name', 'text')
     .size(20)
-    .color('#FFF')
+    .color('#000')
     .style({
       // fontFamily: 'Monaco, monospace', // 字体
       fontWeight: 200,
@@ -72,7 +72,7 @@
       spacing: 2, // 字符间距
       padding: [ 4, 4 ], // 文本包围盒 padding [水平，垂直]，影响碰撞检测结果，避免相邻文本靠的太近
       strokeColor: '#fff', // 描边颜色
-      strokeWidth: 1, // 描边宽度
+      strokeWidth: 4, // 描边宽度
       opacity: 1.0
     })
     .render();

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@antv/l7",
-  "version": "1.3.0-beta.3",
+  "version": "1.3.0-beta.4",
   "description": "Large-scale WebGL-powered Geospatial Data Visualization",
   "main": "build/L7.js",
   "browser": "build/L7-min.js",

src/geom/shader/text_frag.glsl

@@ -23,6 +23,6 @@ void main() {
 
   highp float alpha = smoothstep(buff - gamma_scaled, buff + gamma_scaled, dist);
 
-  gl_FragColor = mix(v_color * u_font_opacity, u_halo_color, smoothstep(0., .5, 1. - dist)) * alpha;
+  gl_FragColor = mix(v_color * u_font_opacity, u_halo_color, smoothstep(0., 0.5, 1. - dist)) * alpha;
   #pragma include "pick"
 }