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32 lines
1.1 KiB
32 lines
1.1 KiB
using UnityEngine;
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// Sets up transformation matrices to scale&scroll water waves
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// for the case where graphics card does not support vertex programs.
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[ExecuteInEditMode]
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public class WaterSimple : MonoBehaviour
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{
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void Update()
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{
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if( !GetComponent<Renderer>() )
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return;
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Material mat = GetComponent<Renderer>().sharedMaterial;
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if( !mat )
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return;
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Vector4 waveSpeed = mat.GetVector( "WaveSpeed" );
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float waveScale = mat.GetFloat( "_WaveScale" );
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float t = Time.time / 20.0f;
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Vector4 offset4 = waveSpeed * (t * waveScale);
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Vector4 offsetClamped = new Vector4(Mathf.Repeat(offset4.x,1.0f), Mathf.Repeat(offset4.y,1.0f), Mathf.Repeat(offset4.z,1.0f), Mathf.Repeat(offset4.w,1.0f));
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mat.SetVector( "_WaveOffset", offsetClamped );
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Vector3 scale = new Vector3( 1.0f/waveScale, 1.0f/waveScale, 1 );
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Matrix4x4 scrollMatrix = Matrix4x4.TRS( new Vector3(offsetClamped.x,offsetClamped.y,0), Quaternion.identity, scale );
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mat.SetMatrix( "_WaveMatrix", scrollMatrix );
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scrollMatrix = Matrix4x4.TRS( new Vector3(offsetClamped.z,offsetClamped.w,0), Quaternion.identity, scale * 0.45f );
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mat.SetMatrix( "_WaveMatrix2", scrollMatrix );
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}
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}
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