FXWater4Simple-mod.shader

// ...

	uniform float4 _GAmplitude;
	uniform float4 _GFrequency;
	uniform float4 _GSteepness;
	uniform float4 _GSpeed;
	uniform float4 _GDirectionAB;
	uniform float4 _GDirectionCD;

// ここから挿入

	struct OceanParticle {
		half3 position;
		half velocity;
		half force;
	};
	uint XDivision;
	uint ZDivision;
	uint XCount;
	uint ZCount;
	StructuredBuffer<OceanParticle> Particles;

// ここまで

// ...

	v2f vert(appdata_full v)
	{
		v2f o;
		
		half3 worldSpaceVertex = mul(_Object2World,(v.vertex)).xyz;
		half3 vtxForAni = (worldSpaceVertex).xzz;
		
// ここから挿入

		half3 nrml = half3(0,1,0);
		half3 offsets = half3(0,0,0);
		
		int kj = (int)v.vertex.x + (int)(XDivision / 2u);
		int ki = (int)v.vertex.z + (int)(ZDivision / 2u);
		if (0<=kj && kj<(int)XCount && 0<=ki && ki<(int)ZCount) {
			int kp = ki * XCount + kj;
			OceanParticle ptc = Particles[kp];
			OceanParticle ptcN = Particles[kp - (0<ki ? 1 : 0) * XCount];
			OceanParticle ptcS = Particles[kp + (ki<(int)ZDivision ? 1 : 0) * XCount];
			OceanParticle ptcE = Particles[kp + (kj<(int)XDivision ? 1 : 0)];
			OceanParticle ptcW = Particles[kp - (0<kj ? 1 : 0)];
			
			half dydx = (ptcE.position.y - ptcW.position.y) / 2;
			half dydz = (ptcS.position.y + ptcN.position.y) / 2;
			nrml = normalize(cross(half3(0,dydz,1), half3(1,dydx,0)));
			
			offsets.y = ptc.position.y * 4;
		}
		
// ここまで
// ここからコメントアウト

		//Gerstner (
		//	offsets, nrml, v.vertex.xyz, vtxForAni,						// offsets, nrml will be written
		//	_GAmplitude,												// amplitude
		//	_GFrequency,												// frequency
		//	_GSteepness,												// steepness
		//	_GSpeed,													// speed
		//	_GDirectionAB,												// direction # 1, 2
		//	_GDirectionCD												// direction # 3, 4
		//);
		
// ここまで

		v.vertex.xyz += offsets;

// ...