48 lines
1.7 KiB
C#
48 lines
1.7 KiB
C#
|
using System.Reflection;
|
||
|
|
using UnityEngine;
|
||
|
|
|
||
|
|
namespace UnityEditor.ShaderGraph
|
||
|
|
{
|
||
|
|
[Title("Procedural", "Checkerboard")]
|
||
|
|
class CheckerboardNode : CodeFunctionNode
|
||
|
|
{
|
||
|
|
public CheckerboardNode()
|
||
|
|
{
|
||
|
|
name = "Checkerboard";
|
||
|
|
}
|
||
|
|
|
||
|
|
protected override MethodInfo GetFunctionToConvert()
|
||
|
|
{
|
||
|
|
return GetType().GetMethod("Unity_Checkerboard", BindingFlags.Static | BindingFlags.NonPublic);
|
||
|
|
}
|
||
|
|
|
||
|
|
static string Unity_Checkerboard(
|
||
|
|
[Slot(0, Binding.MeshUV0)] Vector2 UV,
|
||
|
|
[Slot(1, Binding.None, 0.2f, 0.2f, 0.2f, 1f)] ColorRGB ColorA,
|
||
|
|
[Slot(2, Binding.None, 0.7f, 0.7f, 0.7f, 1f)] ColorRGB ColorB,
|
||
|
|
[Slot(3, Binding.None, 1f, 1f, 1f, 1f)] Vector2 Frequency,
|
||
|
|
[Slot(4, Binding.None, ShaderStageCapability.Fragment)] out Vector3 Out)
|
||
|
|
{
|
||
|
|
Out = Vector2.zero;
|
||
|
|
return
|
||
|
|
@"
|
||
|
|
{
|
||
|
|
#if defined(SHADER_STAGE_RAY_TRACING)
|
||
|
|
int2 checker = frac(Frequency * UV) > 0.5;
|
||
|
|
Out = checker.x ^ checker.y ? ColorA : ColorB;
|
||
|
|
#else
|
||
|
|
UV = (UV.xy + 0.5) * Frequency;
|
||
|
|
$precision2 distance3 = 4.0 * abs(frac(UV + 0.25) - 0.5) - 1.0;
|
||
|
|
$precision4 derivatives = $precision4(ddx(UV), ddy(UV));
|
||
|
|
$precision2 duv_length = sqrt($precision2(dot(derivatives.xz, derivatives.xz), dot(derivatives.yw, derivatives.yw)));
|
||
|
|
$precision2 scale = 0.35 / duv_length.xy;
|
||
|
|
$precision freqLimiter = sqrt(clamp(1.1f - max(duv_length.x, duv_length.y), 0.0, 1.0));
|
||
|
|
$precision2 vector_alpha = clamp(distance3 * scale.xy, -1.0, 1.0);
|
||
|
|
$precision alpha = saturate(0.5f + 0.5f * vector_alpha.x * vector_alpha.y * freqLimiter);
|
||
|
|
Out = lerp(ColorA, ColorB, alpha.xxx);
|
||
|
|
#endif
|
||
|
|
}";
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|