mirror of
https://github.com/DeMuenu/MoonlightVRC.git
synced 2025-12-12 19:13:56 +00:00
0e633983cf
Replaces the use of world-to-local matrices for shadowcaster planes with explicit plane origin, basis, and normal vectors in both C# and shader code. Updates property setting in ShadowcasterUpdater and its editor preview, and rewrites the shadow sampling function in the shader include to use the new basis. Adjusts all affected shaders to use the new properties and sampling function for improved clarity and flexibility.
77 lines
2.7 KiB
C#
77 lines
2.7 KiB
C#
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using System.Security.Permissions;
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using UdonSharp;
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using UnityEngine;
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using VRC.SDKBase;
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using VRC.Udon;
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public class ShadowcasterUpdater : UdonSharpBehaviour
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{
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public Renderer[] rendererTargets;
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public Texture2D ShadowcasterTexture;
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public Color OutsideColor = Color.white;
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public Color TextureColor = Color.white;
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public float MinBrightness = 0.0f;
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public int shadowcasterIndex = 1;
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private MaterialPropertyBlock _mpb;
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void Start()
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{
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_mpb = new MaterialPropertyBlock();
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ApplyTextureData();
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}
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public void ApplyTextureData()
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{
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foreach (Renderer mat in rendererTargets)
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{
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if (mat == null) continue;
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mat.GetPropertyBlock(_mpb);
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_mpb.SetTexture("_Udon_shadowCasterTex" + "_" + shadowcasterIndex.ToString(), ShadowcasterTexture);
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_mpb.SetColor("_Udon_shadowCasterColor" + "_" + shadowcasterIndex.ToString(), TextureColor);
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_mpb.SetColor("_Udon_OutSideColor" + "_" + shadowcasterIndex.ToString(), OutsideColor);
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_mpb.SetFloat("_Udon_MinBrightnessShadow" + "_" + shadowcasterIndex.ToString(), MinBrightness);
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mat.SetPropertyBlock(_mpb);
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}
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}
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void LateUpdate()
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{
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foreach (Renderer mat in rendererTargets)
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{
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if (mat == null) continue;
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mat.GetPropertyBlock(_mpb);
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float quadHalfWidth = 0.5f;
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float quadHalfHeight = 0.5f;
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// World-space basis directions from transform
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Vector3 Udir = transform.rotation * Vector3.right; // plane local +X
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Vector3 Vdir = transform.rotation * Vector3.up; // plane local +Y
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// World-space half extents after non-uniform scaling
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float halfW = quadHalfWidth * transform.lossyScale.x;
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float halfH = quadHalfHeight * transform.lossyScale.y;
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// Reciprocal axes so dot(r, Uinv/Vinv) -> [-0.5, 0.5]
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Vector3 Uinv = Udir / (2.0f * Mathf.Max(halfW, 1e-6f));
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Vector3 Vinv = Vdir / (2.0f * Mathf.Max(halfH, 1e-6f));
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// Unit normal
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Vector3 N = Vector3.Normalize(Vector3.Cross(Udir, Vdir));
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_mpb.SetVector("_Udon_Plane_Origin_" + shadowcasterIndex.ToString(), new Vector4(transform.position.x, transform.position.y, transform.position.z, 0));
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_mpb.SetVector("_Udon_Plane_Uinv_" + shadowcasterIndex.ToString(), new Vector4(Uinv.x, Uinv.y, Uinv.z, 0));
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_mpb.SetVector("_Udon_Plane_Vinv_" + shadowcasterIndex.ToString(), new Vector4(Vinv.x, Vinv.y, Vinv.z, 0));
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_mpb.SetVector("_Udon_Plane_Normal_" + shadowcasterIndex.ToString(), new Vector4(N.x, N.y, N.z, 0));
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mat.SetPropertyBlock(_mpb);
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}
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}
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}
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