67 lines
3.0 KiB
C#
67 lines
3.0 KiB
C#
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//Stylized Water 2: Underwater Rendering extension
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//Staggart Creations (http://staggart.xyz)
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//Copyright protected under Unity Asset Store EULA
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using UnityEngine;
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using UnityEngine.Rendering;
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#if URP
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using UnityEngine.Rendering.Universal;
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#endif
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namespace StylizedWater2.UnderwaterRendering
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{
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public static class UnderwaterLighting
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{
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#if URP
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private static readonly int _AmbientParams = Shader.PropertyToID("_AmbientParams");
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private static readonly int _UnderwaterAmbientColor = Shader.PropertyToID("_UnderwaterAmbientColor");
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//Global values that needs to be set up again, won't survive opaque pass
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private static readonly int skyboxCubemap = Shader.PropertyToID("skyboxCubemap");
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private static readonly int skyboxCubemap_HDR = Shader.PropertyToID("skyboxCubemap_HDR");
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private static readonly int unity_WorldToLight = Shader.PropertyToID("unity_WorldToLight");
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private static Vector4 ambientParams;
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public static void PassAmbientLighting(ScriptableRenderPass pass, CommandBuffer cmd)
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{
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//URP uses spherical harmonics to store the ambient light color, even if it's flat. But this is done in native engine code
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//Normally set up on a per-renderer basis, emulate the behaviour for post-processing passes
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if (RenderSettings.ambientMode == AmbientMode.Skybox)
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{
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cmd.SetGlobalTexture(skyboxCubemap, ReflectionProbe.defaultTexture);
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cmd.SetGlobalVector(skyboxCubemap_HDR, ReflectionProbe.defaultTextureHDRDecodeValues);
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}
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else if (RenderSettings.ambientMode == AmbientMode.Flat)
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{
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cmd.SetGlobalColor(_UnderwaterAmbientColor, RenderSettings.ambientLight.linear);
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}
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else //Tri-light
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{
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cmd.SetGlobalColor(_UnderwaterAmbientColor, RenderSettings.ambientEquatorColor.linear);
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}
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ambientParams.x = Mathf.GammaToLinearSpace(RenderSettings.ambientIntensity);
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ambientParams.y = RenderSettings.ambientMode == AmbientMode.Skybox ? 1 : 0;
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cmd.SetGlobalVector(_AmbientParams, ambientParams);
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}
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private static VisibleLight mainLight;
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public static void PassMainLight(CommandBuffer cmd, RenderingData renderingData)
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{
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// When no lights are visible, main light will be set to -1.
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if (renderingData.lightData.mainLightIndex > -1)
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{
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mainLight = renderingData.lightData.visibleLights[renderingData.lightData.mainLightIndex];
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if (mainLight.lightType == LightType.Directional)
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{
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//Force a unit scale, otherwise affects the projection tiling of the caustics
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cmd.SetGlobalMatrix(unity_WorldToLight, Matrix4x4.TRS(mainLight.light.transform.position, mainLight.light.transform.rotation, Vector3.one).inverse);
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}
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}
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}
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#endif
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}
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}
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