99 lines
3.3 KiB
Plaintext
99 lines
3.3 KiB
Plaintext
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shader_type spatial;
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render_mode unshaded, blend_mix, cull_disabled, depth_draw_opaque;
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// ===== Your existing params =====
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uniform vec2 R = vec2(0.8, 0.6);
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uniform float scale = 0.5;
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uniform float speed = 1.0;
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uniform vec3 direction = vec3(1.0, 1.0, 0.0);
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uniform float distortion = 0.5;
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uniform float layers = 2.0;
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uniform float shades = 3.0;
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uniform int steps = 6;
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uniform vec3 tint = vec3(0.459, 0.765, 1.0);
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// ===== Waves (Gerstner) =====
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uniform vec2 wave1_dir = vec2(1.0, 0.2);
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uniform float wave1_amp = 0.25;
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uniform float wave1_len = 8.0;
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uniform float wave1_steep = 0.6;
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uniform float wave1_speed = 1.0;
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uniform vec2 wave2_dir = vec2(0.3, 1.0);
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uniform float wave2_amp = 0.12;
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uniform float wave2_len = 3.5;
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uniform float wave2_steep = 0.7;
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uniform float wave2_speed = 1.6;
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uniform float time_scale = 1.0;
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// ---- noise for color ----
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float gyroid(vec3 seed) { return dot(sin(seed), cos(seed.yzx)); }
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float fbm(vec3 seed) {
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float result = 0.0;
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float a = 0.5;
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for (int i = 0; i < steps; i++) {
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seed += direction * TIME * speed * 0.01 / a;
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seed.z += result * distortion;
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result += gyroid(seed / a) * a;
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a *= 0.5;
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}
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return result;
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}
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// Gerstner in object space
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vec3 gerstner_obj(vec2 obj_xz, vec2 dir, float amp, float lambda, float steep, float spd, float t) {
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dir = normalize(dir);
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float k = 2.0 * PI / max(lambda, 0.001);
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float phase = dot(dir, obj_xz) * k - spd * t;
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float A = amp;
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float Q = clamp(steep, 0.0, 1.0);
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float c = cos(phase);
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float s = sin(phase);
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vec2 disp_xz = dir * (Q * A * c);
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float disp_y = A * s;
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return vec3(disp_xz.x, disp_y, disp_xz.y);
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}
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void vertex() {
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float t = TIME * time_scale;
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// Use local/object-space XZ for the wave phase (no world matrix needed)
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vec2 obj_xz = VERTEX.xz;
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vec3 d1 = gerstner_obj(obj_xz, wave1_dir, wave1_amp, wave1_len, wave1_steep, wave1_speed, t);
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vec3 d2 = gerstner_obj(obj_xz, wave2_dir, wave2_amp, wave2_len, wave2_steep, wave2_speed, t);
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vec3 disp = d1 + d2;
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VERTEX += disp;
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// Quick procedural normal (only matters if you later use lit shading)
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vec2 eps = vec2(0.05, 0.0);
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float h = (gerstner_obj(obj_xz, wave1_dir, wave1_amp, wave1_len, wave1_steep, wave1_speed, t).y
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+ gerstner_obj(obj_xz, wave2_dir, wave2_amp, wave2_len, wave2_steep, wave2_speed, t).y);
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float hx = (gerstner_obj(obj_xz + vec2(eps.x,0), wave1_dir, wave1_amp, wave1_len, wave1_steep, wave1_speed, t).y
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+ gerstner_obj(obj_xz + vec2(eps.x,0), wave2_dir, wave2_amp, wave2_len, wave2_steep, wave2_speed, t).y);
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float hz = (gerstner_obj(obj_xz + vec2(0,eps.x), wave1_dir, wave1_amp, wave1_len, wave1_steep, wave1_speed, t).y
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+ gerstner_obj(obj_xz + vec2(0,eps.x), wave2_dir, wave2_amp, wave2_len, wave2_steep, wave2_speed, t).y);
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vec3 dx = vec3(eps.x, hx - h, 0.0);
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vec3 dz = vec3(0.0, hz - h, eps.x);
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NORMAL = normalize(cross(dz, dx));
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}
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void fragment() {
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// Keep your 2D-water look
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vec2 p = (2.0 * UV - R) / R.y;
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float shape = fbm(vec3(p * scale, 0.0));
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float gradient = fract(shape * layers);
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float shade = round(pow(gradient, 4.0) * shades) / shades;
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vec3 color = mix(tint * mix(0.6, 0.8, gradient), vec3(1.0), shade);
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ALBEDO = color;
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EMISSION = color;
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ALPHA = 1.0;
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}
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