heat.frag

main 57 lines · 1.3 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 = 0.06;

9const float speed_x = 0.03;

10const float speed_y = 0.02;

12// geometry

13const float intensity = 30.;

14const int steps = 5;

15const float frequency = 3.0;

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

18// reflection and emboss

19const float delta = 100.;

20const float intence = 1.2;

21const float emboss = 0.1;

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}