Adds SineWave Effect

2023-05-08 20:22:54 -04:00
parent 76be38e595
commit 01e0826bd6
4 changed files with 108 additions and 2 deletions
@@ -0,0 +1,56 @@
+import torch
+import numpy as np
+
+class SineWave:
+    def __init__(self):
+        pass
+
+    @classmethod
+    def INPUT_TYPES(s):
+        return {
+            "required": {
+                "image": ("IMAGE",),
+                "amplitude": ("FLOAT", {
+                    "default": 50,
+                    "min": 0,
+                    "max": 150,
+                    "step": 5
+                }),
+                "frequency": ("FLOAT", {
+                    "default": 5,
+                    "min": 0,
+                    "max": 20,
+                    "step": 1
+                }),
+            },
+        }
+
+    RETURN_TYPES = ("IMAGE",)
+    FUNCTION = "apply_sine_wave"
+
+    CATEGORY = "postprocessing/Effects"
+
+    def apply_sine_wave(self, image: torch.Tensor, amplitude: float, frequency: float):
+        batch_size, height, width, channels = image.shape
+        result = torch.zeros_like(image)
+
+        for b in range(batch_size):
+            tensor_image = image[b]
+            result[b] = self.sine_wave_effect(tensor_image, amplitude, frequency)
+
+        return (result,)
+
+    def sine_wave_effect(self, image: torch.Tensor, amplitude: float, frequency: float):
+        height, width, _ = image.shape
+        shifted_image = torch.zeros_like(image)
+
+        for channel in range(3):
+            for i in range(height):
+                offset = int(amplitude * np.sin(2 * torch.pi * i * frequency / height))
+                shifted_image[i, :, channel] = torch.roll(image[i, :, channel], offset)
+
+        return shifted_image
+
+NODE_CLASS_MAPPINGS = {
+    "SineWave": SineWave,
+}