noise.frag

main 57 lines · 1.4 KB Raw

Alex Commit Client Upload Part 1 19/10/2026 00:04

1uniform sampler2D u_Tex0;

2varying vec2 v_TexCoord;

3uniform float u_Time;

4uniform vec2 u_Resolution;

5const float PI = 3.1415926535897932;

7// speed

8const float speed = 0.16;

9const float speed_x = 0.13;

10const float speed_y = 0.12;

12// geometry

13const float intensity = 100.;

14const int steps = 3;

15const float frequency = 100.0;

16const int angle = 7; // better when a prime

18// reflection and emboss

19const float delta = 1000.;

20const float intence = 10.2;

21const float emboss = 1.;

23//---------- crystals effect

24float col(vec2 coord)

25{

26 float delta_theta = 2.0 * PI / float(angle);

27 float col = 0.0;

28 float theta = 0.0;

29 for(int i = 0; i < steps; i++) {

30 vec2 adjc = coord;

31 theta = delta_theta*float(i);

32 adjc.x += cos(theta)*u_Time*speed + u_Time * speed_x;

33 adjc.y -= sin(theta)*u_Time*speed - u_Time * speed_y;

34 col = col + cos( (adjc.x*cos(theta) - adjc.y*sin(theta))*frequency)*intensity;

35 }

36 return cos(col);

37}

39void main(void)

40{

41 vec2 p = v_TexCoord, c1 = p, c2 = p;

42 float cc1 = col(c1);

44 c2.x += u_Resolution.x/delta;

45 float dx = emboss*(cc1-col(c2))/delta;

47 c2.x = p.x;

48 c2.y += u_Resolution.y/delta;

49 float dy = emboss*(cc1-col(c2))/delta;

51 c1.x += dx;

52 c1.y += dy;

54 float alpha = 1.+dot(dx,dy)*intence;

55 gl_FragColor = texture2D(u_Tex0,c1)*(alpha);

56}