rj-action-library/Runtime/Procedural/Assets/Grass/Windy Grass Shader.gdshader

// NOTE: Shader automatically converted from Godot Engine 4.3.stable.mono's StandardMaterial3D.

shader_type spatial;
render_mode blend_mix, depth_draw_opaque, cull_back, diffuse_burley, specular_schlick_ggx;

#include "res://addons/rokojori_action_library/Runtime/Shading/Library/Math.gdshaderinc"
#include "res://addons/rokojori_action_library/Runtime/Shading/Library/Transform.gdshaderinc"
#include "res://addons/rokojori_action_library/Runtime/Shading/Library/Noise.gdshaderinc"


uniform vec4 albedo : source_color;
uniform sampler2D texture_albedo : source_color, filter_linear_mipmap, repeat_enable;

uniform float roughness : hint_range(0.0, 1.0);
uniform sampler2D texture_metallic : hint_default_white, filter_linear_mipmap, repeat_enable;
uniform vec4 metallic_texture_channel;
uniform sampler2D texture_roughness : hint_roughness_r, filter_linear_mipmap, repeat_enable;

uniform float specular : hint_range(0.0, 1.0, 0.01);
uniform float metallic : hint_range(0.0, 1.0, 0.01);

uniform sampler2D texture_normal : hint_roughness_normal, filter_linear_mipmap, repeat_enable;
uniform float normal_scale : hint_range(-16.0, 16.0);

uniform sampler2D texture_ambient_occlusion : hint_default_white, filter_linear_mipmap, repeat_enable;
uniform vec4 ao_texture_channel;
uniform float ao_light_affect : hint_range(0.0, 1.0, 0.01);

uniform vec3 uv1_scale;
uniform vec3 uv1_offset;

uniform float windStrength = 0;
uniform vec2 windSpeed = vec2(1,1);
uniform float windScale = 1;
uniform sampler2D windNoise;
uniform vec2 windNoiseAngleOffset;
uniform vec2 windNoiseStrengthOffset;
uniform float windStart = 0;
uniform float windEnd = 1;
uniform float windWeightCurve:hint_range(0,1) = 0.5f;
uniform float windHeightCompensation :hint_range(0,1) = 0.5f;

void vertex() 
{
	UV = UV * uv1_scale.xy + uv1_offset.xy;
  
  float windAmount = normalizeToRange01( VERTEX.y, windStart, windEnd );
  float rawWindAmount = windAmount;
  windAmount = mix( windAmount, windAmount * windAmount, windWeightCurve );
  vec3 worldVertex = localToWorld( VERTEX, MODEL_MATRIX ).xyz;
  vec2 windUV = TIME * windSpeed + worldVertex.xz * windScale;
  float angle = texture( windNoise, windUV + windNoiseAngleOffset).r * PI * 2.0;
  float strength = texture( windNoise, windUV + windNoiseStrengthOffset ).r * windStrength;
  vec2 circle = onCircle( angle ) * strength;
  VERTEX = worldToLocal( worldVertex + vec3( circle.x, 0, circle.y ) * windAmount, MODEL_MATRIX );
  float minY = min( VERTEX.y, 0 );
  // VERTEX.y = mix( VERTEX.y, max( 0, VERTEX.y - strength * windAmount), windHeightCompensation * 2.0f );
  VERTEX.y = mix( VERTEX.y, max( minY, VERTEX.y - strength * windAmount), windHeightCompensation * 4.0f );
}

void fragment() 
{
	vec2 base_uv = UV;

	vec4 albedo_tex = texture(texture_albedo, base_uv);
	ALBEDO = albedo.rgb * albedo_tex.rgb;
  
	float metallic_tex = dot(texture(texture_metallic, base_uv), metallic_texture_channel);
	METALLIC = metallic_tex * metallic;
	SPECULAR = specular;
  
	vec4 roughness_texture_channel = vec4(1.0, 0.0, 0.0, 0.0);
	float roughness_tex = dot(texture(texture_roughness, base_uv), roughness_texture_channel);
	ROUGHNESS = roughness_tex * roughness;

	NORMAL_MAP = texture(texture_normal, base_uv).rgb;
	NORMAL_MAP_DEPTH = normal_scale;

	AO = dot(texture(texture_ambient_occlusion, base_uv), ao_texture_channel);
	AO_LIGHT_AFFECT = ao_light_affect;
}