214 lines
7.5 KiB
C#
214 lines
7.5 KiB
C#
using System;
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using System.Collections;
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using System.Collections.Generic;
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using UnityEngine;
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//using System.Runtime.CompilerServices;
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//#pragma warning disable 0660, 0661
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static public class LuxWaterUtils {
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public struct GersterWavesDescription {
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public Vector3 intensity;
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public Vector4 steepness;
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public Vector4 amp;
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public Vector4 freq;
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public Vector4 speed;
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public Vector4 dirAB;
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public Vector4 dirCD;
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public Vector4 secondaryWaveParams;
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}
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static public void GetGersterWavesDescription (ref GersterWavesDescription Description, Material WaterMaterial ) {
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Description.intensity = WaterMaterial.GetVector("_GerstnerVertexIntensity");
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Description.steepness = WaterMaterial.GetVector("_GSteepness");
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Description.amp = WaterMaterial.GetVector("_GAmplitude");
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Description.freq = WaterMaterial.GetVector("_GFinalFrequency");
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Description.speed = WaterMaterial.GetVector("_GFinalSpeed");
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Description.dirAB = WaterMaterial.GetVector("_GDirectionAB");
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Description.dirCD = WaterMaterial.GetVector("_GDirectionCD");
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Description.secondaryWaveParams = WaterMaterial.GetVector("_GerstnerSecondaryWaves");
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}
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static public Vector3 InternalGetGestnerDisplacement (
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Vector2 xzVtx, Vector4 intensity, Vector4 steepness, Vector4 amp, Vector4 freq, Vector4 speed, Vector4 dirAB, Vector4 dirCD, float TimeOffset
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) {
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Vector4 AB;
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Vector4 CD;
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// half4 AB = steepness.xxyy * amp.xxyy * dirAB.xyzw;
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AB.x = steepness.x * amp.x * dirAB.x;
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AB.y = steepness.x * amp.x * dirAB.y;
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AB.z = steepness.y * amp.y * dirAB.z;
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AB.w = steepness.y * amp.y * dirAB.w;
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// half4 CD = steepness.zzww * amp.zzww * dirCD.xyzw;
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CD.x = steepness.z * amp.z * dirCD.x;
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CD.y = steepness.z * amp.z * dirCD.y;
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CD.z = steepness.w * amp.w * dirCD.z;
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CD.w = steepness.w * amp.w * dirCD.w;
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// half4 dotABCD = freq.xyzw * half4(dot(dirAB.xy, xzVtx), dot(dirAB.zw, xzVtx), dot(dirCD.xy, xzVtx), dot(dirCD.zw, xzVtx));
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Vector4 dotABCD;
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dotABCD.x = freq.x * (dirAB.x * xzVtx.x + dirAB.y * xzVtx.y);
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dotABCD.y = freq.y * (dirAB.z * xzVtx.x + dirAB.w * xzVtx.y);
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dotABCD.z = freq.z * (dirCD.x * xzVtx.x + dirCD.y * xzVtx.y);
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dotABCD.w = freq.w * (dirCD.z * xzVtx.x + dirCD.w * xzVtx.y);
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Vector4 TIME;
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// In case we do not use underwater rendering
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float time = Time.timeSinceLevelLoad + TimeOffset; // Shader.GetGlobalVector("_Time").y + TimeOffset ; //Time.time; //timeSinceLevelLoad; //.time
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// half4 TIME = _Time.yyyy * speed;
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TIME.x = time * speed.x;
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TIME.y = time * speed.y;
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TIME.z = time * speed.z;
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TIME.w = time * speed.w;
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Vector4 COS;
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// half4 COS = cos (dotABCD + TIME);
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dotABCD.x += TIME.x;
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dotABCD.y += TIME.y;
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dotABCD.z += TIME.z;
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dotABCD.w += TIME.w;
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COS.x = (float)Math.Cos(dotABCD.x);
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COS.y = (float)Math.Cos(dotABCD.y);
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COS.z = (float)Math.Cos(dotABCD.z);
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COS.w = (float)Math.Cos(dotABCD.w);
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Vector4 SIN;
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// half4 SIN = sin (dotABCD + TIME);
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SIN.x = (float)Math.Sin(dotABCD.x);
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SIN.y = (float)Math.Sin(dotABCD.y);
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SIN.z = (float)Math.Sin(dotABCD.z);
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SIN.w = (float)Math.Sin(dotABCD.w);
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Vector3 offsets;
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// offsets.x = dot(COS, half4(AB.xz, CD.xz));
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offsets.x = (COS.x * AB.x + COS.y * AB.z + COS.z * CD.x + COS.w * CD.z) * intensity.x;
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// offsets.z = dot(COS, half4(AB.yw, CD.yw));
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offsets.z = (COS.x * AB.y + COS.y * AB.w + COS.z * CD.y + COS.w * CD.w) * intensity.z;
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// offsets.y = dot(SIN, amp);
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offsets.y = (SIN.x * amp.x + SIN.y * amp.y + SIN.z * amp.z + SIN.w * amp.w) * intensity.y;
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return (offsets);
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}
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static public Vector3 GetGestnerDisplacement (
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Vector3 WorldPosition,
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GersterWavesDescription Description,
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float TimeOffset
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) {
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Vector3 offsets;
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Vector2 xzVtx;
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xzVtx.x = WorldPosition.x;
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xzVtx.y = WorldPosition.z;
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offsets = InternalGetGestnerDisplacement (
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xzVtx, Description.intensity, Description.steepness, Description.amp, Description.freq, Description.speed, Description.dirAB, Description.dirCD, TimeOffset
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);
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if (Description.secondaryWaveParams.x > 0) {
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xzVtx.x += offsets.x;
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xzVtx.y += offsets.z;
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offsets += InternalGetGestnerDisplacement (
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xzVtx, Description.intensity, Description.steepness * Description.secondaryWaveParams.z, Description.amp * Description.secondaryWaveParams.x, Description.freq * Description.secondaryWaveParams.y, Description.speed * Description.secondaryWaveParams.w,
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// Directions are swizzled
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new Vector4 (Description.dirAB.z, Description.dirAB.w, Description.dirAB.x, Description.dirAB.y),
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new Vector4 (Description.dirCD.z, Description.dirCD.w, Description.dirCD.x, Description.dirCD.y),
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TimeOffset
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);
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}
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return (offsets);
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}
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// [MethodImpl(MethodImplOptions.AggressiveInlining)]
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static public Vector3 GetGestnerDisplacementSingle (
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Vector3 WorldPosition,
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GersterWavesDescription Description,
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float TimeOffset
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) {
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Vector2 xzVtx;
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xzVtx.x = WorldPosition.x;
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xzVtx.y = WorldPosition.z;
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Vector4 AB;
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Vector4 CD;
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// half4 AB = steepness.xxyy * amp.xxyy * dirAB.xyzw;
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AB.x = Description.steepness.x * Description.amp.x * Description.dirAB.x;
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AB.y = Description.steepness.x * Description.amp.x * Description.dirAB.y;
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AB.z = Description.steepness.y * Description.amp.y * Description.dirAB.z;
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AB.w = Description.steepness.y * Description.amp.y * Description.dirAB.w;
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// half4 CD = steepness.zzww * amp.zzww * dirCD.xyzw;
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CD.x = Description.steepness.z * Description.amp.z * Description.dirCD.x;
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CD.y = Description.steepness.z * Description.amp.z * Description.dirCD.y;
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CD.z = Description.steepness.w * Description.amp.w * Description.dirCD.z;
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CD.w = Description.steepness.w * Description.amp.w * Description.dirCD.w;
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// half4 dotABCD = freq.xyzw * half4(dot(dirAB.xy, xzVtx), dot(dirAB.zw, xzVtx), dot(dirCD.xy, xzVtx), dot(dirCD.zw, xzVtx));
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Vector4 dotABCD;
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dotABCD.x = Description.freq.x * (Description.dirAB.x * xzVtx.x + Description.dirAB.y * xzVtx.y);
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dotABCD.y = Description.freq.y * (Description.dirAB.z * xzVtx.x + Description.dirAB.w * xzVtx.y);
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dotABCD.z = Description.freq.z * (Description.dirCD.x * xzVtx.x + Description.dirCD.y * xzVtx.y);
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dotABCD.w = Description.freq.w * (Description.dirCD.z * xzVtx.x + Description.dirCD.w * xzVtx.y);
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Vector4 TIME;
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// In case we do not use underwater rendering
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float time = Time.timeSinceLevelLoad + TimeOffset; // Shader.GetGlobalVector("_Time").y + TimeOffset ; //Time.time; //timeSinceLevelLoad; //.time
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// half4 TIME = _Time.yyyy * speed;
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TIME.x = time * Description.speed.x;
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TIME.y = time * Description.speed.y;
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TIME.z = time * Description.speed.z;
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TIME.w = time * Description.speed.w;
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Vector4 COS;
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// half4 COS = cos (dotABCD + TIME);
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dotABCD.x += TIME.x;
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dotABCD.y += TIME.y;
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dotABCD.z += TIME.z;
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dotABCD.w += TIME.w;
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COS.x = (float)Math.Cos(dotABCD.x);
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COS.y = (float)Math.Cos(dotABCD.y);
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COS.z = (float)Math.Cos(dotABCD.z);
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COS.w = (float)Math.Cos(dotABCD.w);
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Vector4 SIN;
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// half4 SIN = sin (dotABCD + TIME);
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SIN.x = (float)Math.Sin(dotABCD.x);
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SIN.y = (float)Math.Sin(dotABCD.y);
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SIN.z = (float)Math.Sin(dotABCD.z);
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SIN.w = (float)Math.Sin(dotABCD.w);
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Vector3 offsets;
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// offsets.x = dot(COS, half4(AB.xz, CD.xz));
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offsets.x = (COS.x * AB.x + COS.y * AB.z + COS.z * CD.x + COS.w * CD.z) * Description.intensity.x;
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// offsets.z = dot(COS, half4(AB.yw, CD.yw));
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offsets.z = (COS.x * AB.y + COS.y * AB.w + COS.z * CD.y + COS.w * CD.w) * Description.intensity.z;
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// offsets.y = dot(SIN, amp);
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offsets.y = (SIN.x * Description.amp.x + SIN.y * Description.amp.y + SIN.z * Description.amp.z + SIN.w * Description.amp.w) * Description.intensity.y;
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return (offsets);
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}
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}
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