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Add fiery-spiral.glsl

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polyfloyd 2018-05-19 15:08:27 +02:00
parent b9f3d8911c
commit c40fdf2ff1
1 changed files with 47 additions and 0 deletions
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fiery-spiral.glsl Normal file
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#define PI 3.141592653589793
#define TAU 6.283185307179586
void mainImage( out vec4 fragColor, in vec2 fragCoord )
{
vec2 p = 2.0*(0.5 * iResolution.xy - fragCoord.xy) / iResolution.xx;
float angle = atan(p.y, p.x);
float turn = (angle + PI) / TAU;
float radius = sqrt(p.x*p.x + p.y*p.y);
float rotation = 0.04 * TAU * iTime;
float turn_1 = turn + rotation;
float n_sub = 2.0;
float turn_sub = mod(float(n_sub) * turn_1, float(n_sub));
float k_sine = 0.1 * sin(3.0 * iTime);
float sine = k_sine * sin(50.0 * (pow(radius, 0.1) - 0.4 * iTime));
float turn_sine = turn_sub + sine;
int n_colors = 5;
int i_turn = int(mod(float(n_colors) * turn_sine, float(n_colors)));
int i_radius = int(1.5/pow(radius*0.5, 0.6) + 5.0 * iTime);
int i_color = int(mod(float(i_turn + i_radius), float(n_colors)));
vec3 color;
if(i_color == 0) {
color = vec3(1.0, 1.0, 1.0);
} else if(i_color == 1) {
color = vec3(0.0, 0.0, 0.0);
} else if(i_color == 2) {
color = vec3(1.0, 0.0, 0.0);
} else if(i_color == 3) {
color = vec3(1.0, 0.5, 0.0);
} else if(i_color == 4) {
color = vec3(1.0, 1.0, 0.0);
}
color *= pow(radius, 0.5)*1.0;
fragColor = vec4(color, 1.0);
}
// https://www.shadertoy.com/view/XdSGzR