23 lines
910 B
Plaintext
23 lines
910 B
Plaintext
|
// https://godotshaders.com/shader/rotation-displacement-vertex-shader/
|
||
|
|
shader_type canvas_item;
|
||
|
|
|
||
|
|
// Set this to your polygon's center in local space.
|
||
|
|
uniform vec2 center = vec2(25., 25.);
|
||
|
|
uniform float amplitude : hint_range(0.0, 1.0) = 0.15;
|
||
|
|
uniform float frequency = 1.5;
|
||
|
|
|
||
|
|
void vertex() {
|
||
|
|
// Translate vertex position so the center is at (0, 0).
|
||
|
|
vec2 pos = VERTEX - center;
|
||
|
|
// Compute the angle of the vertex relative to the center.
|
||
|
|
// This angle will be used to offset the sine wave phase.
|
||
|
|
float angle = atan(pos.y, pos.x);
|
||
|
|
// Create a sine wave where each vertex is offset by its angle.
|
||
|
|
// You can adjust the formula as desired.
|
||
|
|
float wave = sin(TIME * frequency - angle);
|
||
|
|
// Use the wave value to scale the vertex's distance from the center.
|
||
|
|
pos *= 1.0 + amplitude * wave;
|
||
|
|
// Move the vertex back to the original coordinate space.
|
||
|
|
VERTEX = pos + center;
|
||
|
|
}
|