update: fix rotation

.gitignore

@@ -4,4 +4,7 @@
 __pycache__
 result
 staged
-res.md
+res.md
+dist
+*.spec
+build

backend.py

@@ -1,11 +1,15 @@
 from flask import Flask
-
+from flask_cors import CORS
 import src
 
+import os
 
 app = Flask(__name__)
+CORS(app)
 
 app.register_blueprint(src.tc_module, url_prefix='/tc')
 
 if __name__ == '__main__':
-    app.run(debug=True, port=35000)
+    # get port from env 'VERTEX_PORT'
+    port = os.getenv('VERTEX_PORT', 35000)
+    app.run(debug=True, host='0.0.0.0', port=port)

src/__init__.py

@@ -22,7 +22,7 @@ def render():
     data_this_day = data["data"][:, :, int(day)]
 
     map = create_heatmap(data_this_day, shift=(
-        0, 180), colormap='hot', rotate_90=1)
+        0, -180), colormap='hot', rotate_90=3)
 
     buff = BytesIO()
     map.save(buff, format="PNG")

src/plot.py

@@ -80,12 +80,21 @@ def create_heatmap(data,
     # 创建颜色映射
     if colormap == 'hot':
         # 红色到黄色的渐变
+        # 非线性变换，使得低值更容易区分。 使用 sqrt(x) 作为映射函数
         def get_color(value):
+            # 首先把原value从0~0.1映射到0~1。如果value大于0.1，就直接取1
+            value = min(value / 0.4, 1)
             if np.isnan(value):
                 return (0, 0, 0, 0)
-            r = int(min(255, value * 510))
+            r = int(min(255, np.sqrt(value) * 256))
-            g = int(max(0, min(255, value * 510 - 255)))
+            g = int(max(0, min(255, np.sqrt(value) * 256 - 256)))
             return (r, g, 0, int(value * 255))
+        # def get_color(value):
+        #     if np.isnan(value):
+        #         return (0, 0, 0, 0)
+        #     r = int(min(255, value * 510))
+        #     g = int(max(0, min(255, value * 510 - 255)))
+        #     return (r, g, 0, int(value * 255))
 
     # 填充像素
     pixels = image.load()