bgfx/3rdparty/glsl-optimizer/tests/vertex/zun-Hidden_TerrainEngine_Details_BillboardWavingDoublePass2-in.txt

struct v2f_vertex_lit {
    vec2 uv;
    vec4 diff;
    vec4 spec;
};
struct v2f_img {
    vec4 pos;
    vec2 uv;
};
struct appdata_img {
    vec4 vertex;
    vec2 texcoord;
};
struct SurfaceOutput {
    vec3 Albedo;
    vec3 Normal;
    vec3 Emission;
    float Specular;
    float Gloss;
    float Alpha;
};
struct appdata_full {
    vec4 vertex;
    vec4 tangent;
    vec3 normal;
    vec4 texcoord;
    vec4 texcoord1;
    vec4 color;
};
struct Input {
    vec2 uv_MainTex;
    vec4 color;
};
struct v2f_surf {
    vec4 pos;
    vec2 hip_pack0;
    vec4 lop_color;
};
uniform vec4 _CameraPosition;
uniform vec3 _CameraRight;
uniform vec3 _CameraUp;
uniform vec4 _MainTex_ST;
uniform vec4 _WaveAndDistance;
uniform vec4 _WavingTint;

uniform vec4 unity_LightShadowBias;
void FastSinCos( in vec4 val, out vec4 s, out vec4 c );
void TerrainWaveGrass( inout vec4 vertex, in float waveAmount, in vec3 color, out vec4 outColor );
void TerrainBillboardGrass( inout vec4 pos, in vec2 offset );
void vert( inout appdata_full v );
v2f_surf vert_surf( in appdata_full v );
void FastSinCos( in vec4 val, out vec4 s, out vec4 c ) {
    vec4 r5;
    vec4 r6;
    vec4 r7;
    vec4 r8;
    vec4 r1;
    vec4 r2;
    vec4 r3;
    vec4 sin7 = vec4( 1.00000, -0.161616, 0.00833330, -0.000198410);
    vec4 cos8 = vec4( -0.500000, 0.0416667, -0.00138889, 2.48016e-005);
    val = ((val * 6.40885) - 3.14159);
    r5 = (val * val);
    r6 = (r5 * r5);
    r7 = (r6 * r5);
    r8 = (r6 * r5);
    r1 = (r5 * val);
    r2 = (r1 * r5);
    r3 = (r2 * r5);
    s = (((val + (r1 * sin7.y )) + (r2 * sin7.z )) + (r3 * sin7.w ));
    c = ((((1.00000 + (r5 * cos8.x )) + (r6 * cos8.y )) + (r7 * cos8.z )) + (r8 * cos8.w ));
}
void TerrainWaveGrass( inout vec4 vertex, in float waveAmount, in vec3 color, out vec4 outColor ) {
    vec4 _waveXSize;
    vec4 _waveZSize;
    vec4 waveSpeed = vec4( 1.20000, 2.00000, 1.60000, 4.80000);
    vec4 _waveXmove = vec4( 0.0240000, 0.0400000, -0.120000, 0.0960000);
    vec4 _waveZmove = vec4( 0.00600000, 0.0200000, -0.0200000, 0.100000);
    vec4 waves;
    vec4 s;
    vec4 c;
    float lighting;
    vec3 waveMove = vec3( 0.000000, 0.000000, 0.000000);
    vec3 waveColor;
    _waveXSize = (vec4( 0.0120000, 0.0200000, 0.0600000, 0.0240000) * _WaveAndDistance.y );
    _waveZSize = (vec4( 0.00600000, 0.0200000, 0.0200000, 0.0500000) * _WaveAndDistance.y );
    waves = (vertex.x  * _waveXSize);
    waves += (vertex.z  * _waveZSize);
    waves += (_WaveAndDistance.x  * waveSpeed);
    waves = fract( waves );
    FastSinCos( waves, s, c);
    s = (s * s);
    s = (s * s);
    lighting = (dot( s, normalize( vec4( 1.00000, 1.00000, 0.400000, 0.200000) )) * 0.700000);
    s = (s * waveAmount);
    waveMove.x  = dot( s, _waveXmove);
    waveMove.z  = dot( s, _waveZmove);
    vertex.xz  -= (waveMove.xz  * _WaveAndDistance.z );
    waveColor = mix( vec3( 0.500000, 0.500000, 0.500000), _WavingTint.xyz , vec3( lighting));
    outColor.xyz  = ((color * waveColor) * 2.00000);
    outColor.w  = 1.00000;
}
void TerrainBillboardGrass( inout vec4 pos, in vec2 offset ) {
    vec3 grasspos;
    grasspos = (pos.xyz  - _CameraPosition.xyz );
    if ( (dot( grasspos, grasspos) > _WaveAndDistance.w ) ){
        offset = vec2( 0.000000);
    }
    pos.xyz  += (offset.x  * _CameraRight.xyz );
    pos.xyz  += (offset.y  * _CameraUp.xyz );
}
void vert( inout appdata_full v ) {
    float waveAmount;
    vec4 color;
    TerrainBillboardGrass( v.vertex, v.tangent.xy );
    waveAmount = v.tangent.y ;
    TerrainWaveGrass( v.vertex, waveAmount, v.color.xyz , color);
    v.color = color;
}
v2f_surf vert_surf( in appdata_full v ) {
    v2f_surf o;
    vert( v);
    o.hip_pack0.xy  = ((v.texcoord.xy  * _MainTex_ST.xy ) + _MainTex_ST.zw );
    o.lop_color = v.color;
    o.pos = ( gl_ModelViewProjectionMatrix * v.vertex );
    o.pos.z  += unity_LightShadowBias.x ;
    if ( (o.pos.z  < ( -o.pos.w  )) ){
        o.pos.z  = ( -o.pos.w  );
    }
    return o;
}
attribute vec4 TANGENT;
void main() {
    v2f_surf xl_retval;
    appdata_full xlt_v;
    xlt_v.vertex = vec4( gl_Vertex);
    xlt_v.tangent = vec4( TANGENT);
    xlt_v.normal = vec3( gl_Normal);
    xlt_v.texcoord = vec4( gl_MultiTexCoord0);
    xlt_v.texcoord1 = vec4( gl_MultiTexCoord1);
    xlt_v.color = vec4( gl_Color);
    xl_retval = vert_surf( xlt_v);
    gl_Position = vec4( xl_retval.pos);
    gl_TexCoord[1] = vec4( xl_retval.hip_pack0, 0.0, 0.0);
    gl_FrontColor = vec4( xl_retval.lop_color);
}