Bounce / Wave

Make a sprite bounce or wave.

– Sine Amplitude determines the distance moved

– Sine speed determines who fast it moves in those directions

– Do Abs performs an absolute value on the vertex adjustment, so it’s more akin to a bounce

– Do Quantize quantizes the movement to the nearest value, based on quantize_to parameter.

  – E.G. Quantize to 1 will only move the sprite in units of 1. Quantize of 0.5, in units of half-pixels, etc.

Shader code

shader_type canvas_item;

group_uniforms Sine;
uniform bool do_abs;
uniform bool do_quantize;
uniform float quantize_to : hint_range(0, 2, 0.1) = 1;
uniform vec2 sine_amplitude = vec2(1.0, 0.0);
uniform vec2 sine_speed = vec2(1.0, 0.0);

void vertex() {
	vec2 s = sin(TIME * sine_speed);
	if (do_abs) {
		s = abs(s);
	}
	VERTEX += s * sine_amplitude;
	if (do_quantize) {
		VERTEX = round(VERTEX / quantize_to);
		VERTEX *= quantize_to;
	}
}

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