Port Port Basics / Color / LinearGradient

Basics/Color/LinearGradient/linear_gradient.py

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+"""
+Simple Linear Gradient
+
+The lerpColor() function is useful for interpolating between two colors.
+"""
+from mewnala import (
+    Color,
+    size,
+    no_fill,
+    stroke,
+    line,
+    run,
+    no_loop,
+)
+
+# Constants
+Y_AXIS: int = 1
+X_AXIS: int = 2
+
+# color b1, b2, c1, c2
+
+def setup():
+    size(640, 360)
+
+    # Define colors
+    # FIXME:
+    #   Defining these in a function doesn't make them accessible in outer scope,
+    #   which causes linting issues with IDEs even when libprocessing provides access to the variables.
+    b1: Color = Color(255)
+    b2: Color = Color(0)
+    c1: Color = Color(204, 102, 0)
+    c2: Color = Color(0, 102, 153)
+
+    no_loop()
+
+def draw():
+    # Background
+    set_gradient(0, 0, width / 2, height, b1, b2, X_AXIS);
+    set_gradient(width / 2, 0, width / 2, height, b2, b1, X_AXIS)
+
+    # Foreground
+    set_gradient(50, 90, 540, 80, c1, c2, Y_AXIS)
+    set_gradient(50, 190, 540, 80, c2, c1, X_AXIS)
+
+
+def set_gradient(x: int, y: int, w: float, h, c1: Color, c2: Color, axis: int):
+    no_fill()
+
+    # Top to bottom gradient
+    if axis == Y_AXIS:
+        for i in range(y, y + h):
+            inter = map(i, y, y+h, 0, 1);
+            c: Color = lerp_color(c1, c2, inter)
+            stroke(c);
+            line(x, i, x+w, i)
+
+    # Left to right gradient
+    elif axis == X_AXIS:
+        for i in range(x, x + w):
+            inter: float = map(i, x, x+w, 0, 1)
+            c: Color = lerp_color(c1, c2, inter)
+            stroke(c);
+            line(i, y, i, y+h);
+
+
+run()