101 lines
2.7 KiB
Plaintext
101 lines
2.7 KiB
Plaintext
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#if !(defined(VFX_VARYING_PS_INPUTS) && defined(VFX_VARYING_POSCS))
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#error VFX_VARYING_PS_INPUTS and VFX_VARYING_POSCS must be defined.
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#endif
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${VFXPerPassInclude}
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${VFXGeneratedBlockFunction}
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struct vs_input
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{
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VFX_DECLARE_INSTANCE_ID
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};
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#pragma vertex vert
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float4 ClipOnNearPlane(float4 pos, float4 other)
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{
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if (pos.w >= _ProjectionParams.y || other.w < _ProjectionParams.y)
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return pos;
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// Project on near plane
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float ratio = (_ProjectionParams.y - pos.w) / (other.w - pos.w);
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return pos + (other - pos) * ratio;
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}
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VFX_VARYING_PS_INPUTS vert(uint id : SV_VertexID, vs_input i)
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{
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VFX_VARYING_PS_INPUTS o = (VFX_VARYING_PS_INPUTS)0;
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UNITY_SETUP_INSTANCE_ID(i);
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UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(o);
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uint index = (id >> 2) + VFX_GET_INSTANCE_ID(i) * 2048;
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${VFXInitInstancing}
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${VFXLoadGraphValues}
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${VFXLoadContextData}
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uint systemSeed = contextData.systemSeed;
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uint nbMax = contextData.maxParticleCount;
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${VFXLoadAttributesOrCull}
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${VFXProcessBlocks}
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if (!attributes.alive)
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return o;
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#if TARGET_FROM_ATTRIBUTES
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${VFXLoadSize}
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float4x4 elementToVFX = GetElementToVFXMatrix(
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attributes.axisX,
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attributes.axisY,
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attributes.axisZ,
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float3(attributes.angleX,attributes.angleY,attributes.angleZ),
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float3(attributes.pivotX,attributes.pivotY,attributes.pivotZ),
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size3,
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attributes.position);
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attributes.position = mul(elementToVFX,float4(0,0,0,1)).xyz;
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${VFXLoadParameter:{targetOffset}}
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attributes.targetPosition = mul(elementToVFX,float4(targetOffset,1)).xyz;
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#endif
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float4 pos0 = TransformPositionVFXToClip(attributes.position);
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float4 pos1 = TransformPositionVFXToClip(attributes.targetPosition);
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pos0 = ClipOnNearPlane(pos0, pos1);
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pos1 = ClipOnNearPlane(pos1, pos0);
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float2 ndcPos0 = pos0.xy / pos0.w;
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float2 ndcPos1 = pos1.xy / pos1.w;
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float2 dir = ndcPos0 - ndcPos1;
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float2 normal = normalize(dir.yx * float2(-1,abs(UNITY_MATRIX_P[1][1]) / UNITY_MATRIX_P[0][0]));
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#if IS_OPAQUE_PARTICLE
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const float thicknessMul = 1.0f; // pixel perfect
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#else
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const float thicknessMul = 2.0f; // for AA
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#endif
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normal *= thicknessMul / _ScreenParams.xy;
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float4 dPos0 = float4(normal * pos0.w, 0.0f, 0.0f);
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float4 dPos1 = float4(normal * pos1.w, 0.0f, 0.0f);
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float4 vPosArray[4] = { pos0 + dPos0, pos0 - dPos0, pos1 + dPos1, pos1 - dPos1};
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#ifdef VFX_VARYING_PIXELOFFSET
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o.VFX_VARYING_PIXELOFFSET = (id & 1) ? -1.0f : 1.0f;
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#endif
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// If ever used we need the position in vfx space (we dont take into account the pixel offset)
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float3 vPos = ((id >> 1) & 1) ? attributes.targetPosition : attributes.position;
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o.VFX_VARYING_POSCS = vPosArray[id & 3];
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${VFXVertexComputeCurrentAndPreviousClipPos}
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${VFXVertexCommonProcess}
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${VFXVertexAdditionalProcess}
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return o;
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}
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