So based on: http://jayconrod.com/posts/34/water-simulation-in-glsl
shader_type spatial;
//render_mode world_vertex_coords;
uniform vec4 color : hint_color;
uniform int numWaves;
uniform float waterHeight;
uniform float wavelength = 8.0;
uniform float amplitude = 8.0;
uniform float speed = 8.0;
uniform vec2 direction = vec2(8.0, 8.0);
uniform float pi = 3.1415926535897932384626433832795;
varying vec3 position;
varying vec3 worldNormal;
varying vec3 eyeNormal;
uniform vec3 eyePos;
float wave(int i, float x, float y, float t) {
float frequency = 2.0 * pi / wavelength;
float phase = speed * frequency;
float theta = dot(direction, vec2(x, y));
return amplitude * sin(theta * frequency + t * phase);
}
float waveHeight(float x, float y, float t) {
float height = 0.0;
for (int i = 0; i < numWaves; i++) {
height += wave(i, x, y, t);
}
return height;
}
float dWaveDx(int i, float x, float y, float t) {
float frequency = 2.0 * pi / wavelength;
float phase = speed * frequency;
float theta = dot(direction, vec2(x, y));
float A = amplitude * direction.x * frequency;
return A * cos(theta * frequency + t * phase);
}
float dWaveDy(int i, float x, float y, float t) {
float frequency = 2.0 * pi / wavelength;
float phase = speed * frequency;
float theta = dot(direction, vec2(x, y));
float A = amplitude * direction.y * frequency;
return A * cos(theta * frequency + t * phase);
}
vec3 waveNormal(float x, float y, float t) {
float dx;
float dy;
for (int i; i < numWaves; i++) {
dx += dWaveDx(i, x, y, t);
dy += dWaveDy(i, x, y, t);
}
vec3 n = vec3(-dx, -dy, 1.0);
return n;
}
void vertex() {
vec4 pos = vec4(VERTEX, 1.0).xzyw;
pos.z = (waterHeight + waveHeight(pos.x, pos.y, TIME));
position = pos.xzy / pos.w;
worldNormal = waveNormal(pos.x, pos.y, TIME);
eyeNormal = (MODELVIEW_MATRIX * vec4(worldNormal, 0.0).xzyw).xyz;
NORMAL = eyeNormal;
TANGENT = eyeNormal;
BINORMAL = eyeNormal;
VERTEX = (position).xyz;
}
void fragment() {
SPECULAR = float(1.0);
ROUGHNESS = float(0.05);
// CLEARCOAT = float(0.99);
// CLEARCOAT_GLOSS = float(1.0);
ALBEDO = color.rgb;
ALPHA = color.a;
}
Its just a simple vertex waveform and needs a vertex dense grid mesh. But its a quick hack job so, like, eh. I do intend to make a proper water shader at some point but I need to familiarize myself with the new shader system more first. Have gotten too used to nodal graph shaders.
