010_sineCosine

Code

/*
Lewis Lepton 2019
https://lewislepton.com
Created for the Shader Tutorial Series
https://www.youtube.com/playlist?list=PL4neAtv21WOmIrTrkNO3xCyrxg4LKkrF7
*/

#ifdef GL_ES
precision mediump float;
#endif

uniform vec2 u_resolution;
uniform float u_time;

float circleshape(vec2 position, float radius){
	return step(radius, length(position - vec2(0.5)));
}

void main(){
	vec2 coord = gl_FragCoord.xy / u_resolution;
	vec3 color = vec3(0.0);

	vec2 translate = vec2(sin(u_time / 10.0), cos(u_time));
	coord += translate * 0.5;

	color = vec3(circleshape(coord, 0.3));

	gl_FragColor = vec4(color, 1.0);
}