shader block

The coordinate system, vectors, and matrices in HCSL are all "right-handed, column-major".

The shader block is where shader code is written. The main function is the entry point. Shader programming is performed using vertex attributes, input, output, uniform specified earlier, as well as the built-in variables and built-in functions described below. Specify the target shader stage name next to shader (e.g. vertex or fragment).

shader vertex
{
    float g_Offset;

    float wave(vec2 st)
    {
        return sin(st.x * 50.0 + HEL_TIME) * 1.5;
    }

    void main()
    {
        g_Offset = 10.0;

        vec4 pos = vec4(_Position, 1.0);
        pos.y += wave(_TexCoord0 * _Size + vec2(_Seed + g_Offset));

        outPos = HEL_MATRIX_P * HEL_MATRIX_V * HEL_MATRIX_W * pos;
        WorldNormal = (HEL_MATRIX_W * vec4(_Normal, 0.0)).xyz;
        uv = _TexCoord0;
    }
}

shader fragment
{
    vec3 hsv2rgb( vec3 c )
    {
        vec3 rgb = clamp( abs(mod(c.x*6.0+vec3(0.0,4.0,2.0),6.0)-3.0)-1.0, 0.0, 1.0 );
        return c.z * mix( vec3(1.0), rgb, c.y);
    }

    void main()
    {
        vec4 col = vec4(1.0);

        vec2 st = uv;
        st *= _MainTex_ST.xy;
        st += _MainTex_ST.zw;

        col.rgb *= helTexture(_MainTex, st).rgb;
        col.rgb *= _MainColor.rgb;
        col.rgb *= hsv2rgb(vec3(mod(HEL_TIME, 1.0), 1.0, 1.0));

        outColor = col;
    }
}

Feedback