public void ProcessOperatorFrac()
{
var a = -1.5f;
var b = 0.2f;
var resultA = a - Mathf.Floor(a);
var resultB = b - Mathf.Floor(b);
var value_a = new VFXValue <float>(a);
var value_b = new VFXValue <float>(b);
var expressionA = VFXOperatorUtility.Frac(value_a);
var expressionB = VFXOperatorUtility.Frac(value_b);
var context = new VFXExpression.Context(VFXExpressionContextOption.CPUEvaluation);
var resultExpressionA = context.Compile(expressionA);
var resultExpressionB = context.Compile(expressionB);
Assert.AreEqual(resultA, resultExpressionA.Get <float>());
Assert.AreEqual(resultB, resultExpressionB.Get <float>());
}
public void ProcessOperatorDistance()
{
var a = new Vector3(0.2f, 0.3f, 0.4f);
var b = new Vector3(1.0f, 2.3f, 5.4f);
var resultA = Vector3.Distance(a, b);
var resultB = Vector3.Dot(a - b, a - b);
var value_a = new VFXValue <Vector3>(a);
var value_b = new VFXValue <Vector3>(b);
var expressionA = VFXOperatorUtility.Distance(value_a, value_b);
var expressionB = VFXOperatorUtility.SqrDistance(value_a, value_b);
var context = new VFXExpression.Context(VFXExpressionContextOption.CPUEvaluation);
var resultExpressionA = context.Compile(expressionA);
var resultExpressionB = context.Compile(expressionB);
Assert.AreEqual(resultA, resultExpressionA.Get <float>());
Assert.AreEqual(resultB, resultExpressionB.Get <float>());
}
public void CheckExpectedSequence_ApplyAddressingMode([ValueSource("ApplyAddressingModeTestCase_ValueSource")] ApplyAddressingModeTestCase addressingMode)
{
var computedSequence = new uint[addressingMode.expectedSequence.Length];
for (uint index = 0u; index < computedSequence.Length; ++index)
{
var indexExpr = VFXValue.Constant(index);
var countExpr = VFXValue.Constant(addressingMode.count);
var computed = VFXOperatorUtility.ApplyAddressingMode(indexExpr, countExpr, addressingMode.mode);
var context = new VFXExpression.Context(VFXExpressionContextOption.CPUEvaluation);
var result = context.Compile(computed);
computedSequence[index] = result.Get <uint>();
}
for (uint index = 0u; index < computedSequence.Length; ++index)
{
Assert.AreEqual(addressingMode.expectedSequence[index], computedSequence[index]);
}
}
public static CameraMatricesExpressions GetMatricesExpressions(IEnumerable <VFXNamedExpression> expressions)
{
var fov = expressions.First(e => e.name == "Camera_fieldOfView");
var aspect = expressions.First(e => e.name == "Camera_aspectRatio");
var near = expressions.First(e => e.name == "Camera_nearPlane");
var far = expressions.First(e => e.name == "Camera_farPlane");
var cameraMatrix = expressions.First(e => e.name == "Camera_transform");
VFXExpression ViewToVFX = cameraMatrix.exp;
VFXExpression VFXToView = new VFXExpressionInverseTRSMatrix(ViewToVFX);
VFXExpression ViewToClip = VFXOperatorUtility.GetPerspectiveMatrix(fov.exp, aspect.exp, near.exp, far.exp);
VFXExpression ClipToView = new VFXExpressionInverseMatrix(ViewToClip);
return(new CameraMatricesExpressions()
{
ViewToVFX = new VFXNamedExpression(ViewToVFX, "ViewToVFX"),
VFXToView = new VFXNamedExpression(VFXToView, "VFXToView"),
ViewToClip = new VFXNamedExpression(ViewToClip, "ViewToClip"),
ClipToView = new VFXNamedExpression(ClipToView, "ClipToView"),
});
}
public void ProcessOperatorCross()
{
var a = new Vector3(1.1f, 2.2f, 3.3f);
var b = new Vector3(4.4f, 5.5f, 6.6f);
var value_a = new VFXValue <Vector3>(a);
var value_b = new VFXValue <Vector3>(b);
var expressionA = VFXOperatorUtility.Cross(value_a, value_b);
var context = new VFXExpression.Context(VFXExpressionContextOption.CPUEvaluation);
var resultExpressionA = context.Compile(expressionA);
var resultValue = resultExpressionA.Get <Vector3>();
var expectedValue = Vector3.Cross(a, b);
Assert.AreEqual(expectedValue.x, resultValue.x, 0.001f);
Assert.AreEqual(expectedValue.y, resultValue.y, 0.001f);
Assert.AreEqual(expectedValue.z, resultValue.z, 0.001f);
}
protected override sealed VFXExpression[] BuildExpression(VFXExpression[] inputExpression)
{
var mesh = inputExpression[0];
var meshVertexStride = new VFXExpressionMeshVertexStride(mesh);
var meshVertexCount = new VFXExpressionMeshVertexCount(mesh);
var vertexIndex = VFXOperatorUtility.ApplyAddressingMode(inputExpression[1], meshVertexCount, mode);
var outputExpressions = new List <VFXExpression>();
foreach (var vertexAttribute in GetOutputVertexAttributes())
{
var meshChannelOffset = new VFXExpressionMeshChannelOffset(mesh, VFXValue.Constant <uint>((uint)GetActualVertexAttribute(vertexAttribute)));
var outputType = GetOutputType(vertexAttribute);
VFXExpression sampled = null;
if (vertexAttribute == VertexAttributeFlag.Color)
{
sampled = new VFXExpressionSampleMeshColor(mesh, vertexIndex, meshChannelOffset, meshVertexStride);
}
else if (outputType == typeof(float))
{
sampled = new VFXExpressionSampleMeshFloat(mesh, vertexIndex, meshChannelOffset, meshVertexStride);
}
else if (outputType == typeof(Vector2))
{
sampled = new VFXExpressionSampleMeshFloat2(mesh, vertexIndex, meshChannelOffset, meshVertexStride);
}
else if (outputType == typeof(Vector3))
{
sampled = new VFXExpressionSampleMeshFloat3(mesh, vertexIndex, meshChannelOffset, meshVertexStride);
}
else
{
sampled = new VFXExpressionSampleMeshFloat4(mesh, vertexIndex, meshChannelOffset, meshVertexStride);
}
outputExpressions.Add(sampled);
}
return(outputExpressions.ToArray());
}
protected override sealed VFXExpression[] BuildExpression(VFXExpression[] inputExpression)
{
VFXExpression parameters = new VFXExpressionCombine(inputExpression[1], inputExpression[3], inputExpression[4]);
VFXExpression result;
if (dimensions == DimensionCount.Two)
{
if (type == NoiseType.Value)
{
result = new VFXExpressionValueCurlNoise2D(inputExpression[0], parameters, inputExpression[2]);
}
else if (type == NoiseType.Perlin)
{
result = new VFXExpressionPerlinCurlNoise2D(inputExpression[0], parameters, inputExpression[2]);
}
else
{
result = new VFXExpressionCellularCurlNoise2D(inputExpression[0], parameters, inputExpression[2]);
}
}
else
{
if (type == NoiseType.Value)
{
result = new VFXExpressionValueCurlNoise3D(inputExpression[0], parameters, inputExpression[2]);
}
else if (type == NoiseType.Perlin)
{
result = new VFXExpressionPerlinCurlNoise3D(inputExpression[0], parameters, inputExpression[2]);
}
else
{
result = new VFXExpressionCellularCurlNoise3D(inputExpression[0], parameters, inputExpression[2]);
}
}
return(new[] { result *VFXOperatorUtility.CastFloat(inputExpression[5], result.valueType) });
}
public void ProcessOperatorPolarToRectangular()
{
var theta = 0.5f;
var distance = 0.2f;
var rectangular = new Vector2(Mathf.Cos(theta), Mathf.Sin(theta)) * distance;
var value_theta = new VFXValue <float>(theta);
var value_distance = new VFXValue <float>(distance);
var expressionA = VFXOperatorUtility.PolarToRectangular(value_theta, value_distance);
var expressionB = VFXOperatorUtility.RectangularToPolar(expressionA);
var context = new VFXExpression.Context(VFXExpressionContextOption.CPUEvaluation);
var resultExpressionA = context.Compile(expressionA);
var resultExpressionB0 = context.Compile(expressionB[0]);
var resultExpressionB1 = context.Compile(expressionB[1]);
Assert.AreEqual(rectangular, resultExpressionA.Get <Vector2>());
Assert.AreEqual(theta, resultExpressionB0.Get <float>());
Assert.AreEqual(distance, resultExpressionB1.Get <float>());
}
protected override sealed VFXExpression[] BuildExpression(VFXExpression[] inputExpression)
{
VFXExpression[] expressions = new VFXExpression[asset.surfaces.Length + 1];
expressions[0] = VFXValue.Constant((uint)asset.PointCount);
for (int i = 0; i < asset.surfaces.Length; i++)
{
var surfaceExpr = VFXValue.Constant(asset.surfaces[i]);
VFXExpression height = new VFXExpressionTextureHeight(surfaceExpr);
VFXExpression width = new VFXExpressionTextureWidth(surfaceExpr);
VFXExpression u_index = VFXOperatorUtility.ApplyAddressingMode(inputExpression[0], new VFXExpressionMin(height * width, expressions[0]), mode);
VFXExpression y = u_index / width;
VFXExpression x = u_index - (y * width);
Type outputType = GetOutputType(asset.surfaces[i]);
var type = typeof(VFXExpressionSampleAttributeMap <>).MakeGenericType(outputType);
var outputExpr = Activator.CreateInstance(type, new object[] { surfaceExpr, x, y });
expressions[i + 1] = (VFXExpression)outputExpr;
}
return(expressions);
}
protected override sealed VFXExpression[] BuildExpression(VFXExpression[] inputExpression)
{
VFXExpression parameters = new VFXExpressionCombine(inputExpression[1], inputExpression[2], inputExpression[4]);
if (dimensions == DimensionCount.One)
{
VFXExpression noise = new VFXExpressionPerlinNoise1D(inputExpression[0], parameters, inputExpression[3]);
noise = VFXOperatorUtility.Fit(noise, VFXValue.Constant(new Vector2(-1.0f, -1.0f)), VFXValue.Constant(Vector2.one), VFXOperatorUtility.CastFloat(inputExpression[5].x, noise.valueType), VFXOperatorUtility.CastFloat(inputExpression[5].y, noise.valueType));
return(new[] { noise.x, noise.y });
}
else if (dimensions == DimensionCount.Two)
{
VFXExpression noise = new VFXExpressionPerlinNoise2D(inputExpression[0], parameters, inputExpression[3]);
noise = VFXOperatorUtility.Fit(noise, VFXValue.Constant(new Vector3(-1.0f, -1.0f, -1.0f)), VFXValue.Constant(Vector3.one), VFXOperatorUtility.CastFloat(inputExpression[5].x, noise.valueType), VFXOperatorUtility.CastFloat(inputExpression[5].y, noise.valueType));
return(new[] { noise.x, new VFXExpressionCombine(noise.y, noise.z) });
}
else
{
VFXExpression noise = new VFXExpressionPerlinNoise3D(inputExpression[0], parameters, inputExpression[3]);
noise = VFXOperatorUtility.Fit(noise, VFXValue.Constant(new Vector4(-1.0f, -1.0f, -1.0f, -1.0f)), VFXValue.Constant(Vector4.one), VFXOperatorUtility.CastFloat(inputExpression[5].x, noise.valueType), VFXOperatorUtility.CastFloat(inputExpression[5].y, noise.valueType));
return(new[] { noise.x, new VFXExpressionCombine(noise.y, noise.z, noise.w) });
}
}
private void GetPositionAndDirectionFromIndex(VFXExpression indexExpr, IEnumerable <VFXNamedExpression> expressions, out VFXExpression positionExpr, out VFXExpression directionExpr)
{
if (shape == SequentialShape.Line)
{
var start = expressions.First(o => o.name == "Start").exp;
var end = expressions.First(o => o.name == "End").exp;
var count = expressions.First(o => o.name == "Count").exp;
positionExpr = VFXOperatorUtility.SequentialLine(start, end, indexExpr, count, mode);
directionExpr = VFXOperatorUtility.SafeNormalize(end - start);
}
else if (shape == SequentialShape.Circle)
{
var center = expressions.First(o => o.name == "Center").exp;
var normal = expressions.First(o => o.name == "Normal").exp;
var up = expressions.First(o => o.name == "Up").exp;
var radius = expressions.First(o => o.name == "Radius").exp;
var count = expressions.First(o => o.name == "Count").exp;
positionExpr = VFXOperatorUtility.SequentialCircle(center, radius, normal, up, indexExpr, count, mode);
directionExpr = VFXOperatorUtility.SafeNormalize(positionExpr - center);
}
else if (shape == SequentialShape.ThreeDimensional)
{
var origin = expressions.First(o => o.name == "Origin").exp;
var axisX = expressions.First(o => o.name == "AxisX").exp;
var axisY = expressions.First(o => o.name == "AxisY").exp;
var axisZ = expressions.First(o => o.name == "AxisZ").exp;
var countX = expressions.First(o => o.name == "CountX").exp;
var countY = expressions.First(o => o.name == "CountY").exp;
var countZ = expressions.First(o => o.name == "CountZ").exp;
positionExpr = VFXOperatorUtility.Sequential3D(origin, axisX, axisY, axisZ, indexExpr, countX, countY, countZ, mode);
directionExpr = VFXOperatorUtility.SafeNormalize(positionExpr - origin);
}
else
{
throw new NotImplementedException();
}
}
public static CameraMatricesExpressions GetMatricesExpressions(IEnumerable <VFXNamedExpression> expressions, VFXCoordinateSpace cameraSpace, VFXCoordinateSpace outputSpace)
{
var fov = expressions.First(e => e.name == "Camera_fieldOfView");
var aspect = expressions.First(e => e.name == "Camera_aspectRatio");
var near = expressions.First(e => e.name == "Camera_nearPlane");
var far = expressions.First(e => e.name == "Camera_farPlane");
var cameraMatrix = expressions.First(e => e.name == "Camera_transform");
var isOrtho = expressions.First(e => e.name == "Camera_orthographic");
var orthoSize = expressions.First(e => e.name == "Camera_orthographicSize");
var lensShift = expressions.First(e => e.name == "Camera_lensShift");
VFXExpression ViewToVFX = cameraMatrix.exp;
if (cameraSpace == VFXCoordinateSpace.World && outputSpace == VFXCoordinateSpace.Local)
{
ViewToVFX = new VFXExpressionTransformMatrix(VFXBuiltInExpression.WorldToLocal, cameraMatrix.exp);
}
else if (cameraSpace == VFXCoordinateSpace.Local && outputSpace == VFXCoordinateSpace.World)
{
ViewToVFX = new VFXExpressionTransformMatrix(VFXBuiltInExpression.LocalToWorld, cameraMatrix.exp);
}
VFXExpression VFXToView = new VFXExpressionInverseTRSMatrix(ViewToVFX);
VFXExpression ViewToClip = new VFXExpressionBranch(isOrtho.exp,
VFXOperatorUtility.GetOrthographicMatrix(orthoSize.exp, aspect.exp, near.exp, far.exp),
VFXOperatorUtility.GetPerspectiveMatrix(fov.exp, aspect.exp, near.exp, far.exp, lensShift.exp));
VFXExpression ClipToView = new VFXExpressionInverseMatrix(ViewToClip);
return(new CameraMatricesExpressions()
{
ViewToVFX = new VFXNamedExpression(ViewToVFX, "ViewToVFX"),
VFXToView = new VFXNamedExpression(VFXToView, "VFXToView"),
ViewToClip = new VFXNamedExpression(ViewToClip, "ViewToClip"),
ClipToView = new VFXNamedExpression(ClipToView, "ClipToView"),
});
}
public void ProcessOperatorLerp()
{
var a = new Vector3(0.2f, 0.3f, 0.4f);
var b = new Vector3(1.0f, 2.3f, 5.4f);
var c = 0.2f;
var d = 1.5f;
var resultA = Vector3.LerpUnclamped(a, b, c);
var resultB = Vector3.LerpUnclamped(a, b, d);
var value_a = new VFXValue <Vector3>(a);
var value_b = new VFXValue <Vector3>(b);
var value_c = new VFXValue <float>(c);
var value_d = new VFXValue <float>(d);
var expressionA = VFXOperatorUtility.Lerp(value_a, value_b, VFXOperatorUtility.CastFloat(value_c, value_b.valueType));
var expressionB = VFXOperatorUtility.Lerp(value_a, value_b, VFXOperatorUtility.CastFloat(value_d, value_b.valueType));
var context = new VFXExpression.Context(VFXExpressionContextOption.CPUEvaluation);
var resultExpressionA = context.Compile(expressionA);
var resultExpressionB = context.Compile(expressionB);
Assert.AreEqual((resultA - resultExpressionA.Get <Vector3>()).magnitude, 0.0f, 0.001f);
Assert.AreEqual((resultB - resultExpressionB.Get <Vector3>()).magnitude, 0.0f, 0.001f);
}
public void ProcessOperatorFit()
{
var value = 0.4f;
var oldRangeMin = 0.2f;
var oldRangeMax = 1.2f;
var newRangeMin = 3.2f;
var newRangeMax = 5.2f;
var percent = (value - oldRangeMin) / (oldRangeMax - oldRangeMin);
var result = Mathf.LerpUnclamped(newRangeMin, newRangeMax, percent);
var value_a = new VFXValue <float>(value);
var value_b = new VFXValue <float>(oldRangeMin);
var value_c = new VFXValue <float>(oldRangeMax);
var value_d = new VFXValue <float>(newRangeMin);
var value_e = new VFXValue <float>(newRangeMax);
var expression = VFXOperatorUtility.Fit(value_a, value_b, value_c, value_d, value_e);
var context = new VFXExpression.Context(VFXExpressionContextOption.CPUEvaluation);
var resultExpression = context.Compile(expression);
Assert.AreEqual(result, resultExpression.Get <float>());
}
protected override sealed VFXExpression[] BuildExpression(VFXExpression[] inputExpression)
{
return(new[] { VFXOperatorUtility.Exp(inputExpression[0], _base) });
}
public static IEnumerable <VFXExpression> SampleTriangleAttribute(VFXExpression source, VFXExpression triangleIndex, VFXExpression coord, SurfaceCoordinates coordMode, IEnumerable <VertexAttribute> vertexAttributes)
{
bool skinnedMesh = source.valueType == UnityEngine.VFX.VFXValueType.SkinnedMeshRenderer;
var mesh = !skinnedMesh ? source : new VFXExpressionMeshFromSkinnedMeshRenderer(source);
var meshIndexCount = new VFXExpressionMeshIndexCount(mesh);
var meshIndexFormat = new VFXExpressionMeshIndexFormat(mesh);
var threeUint = VFXOperatorUtility.ThreeExpression[UnityEngine.VFX.VFXValueType.Uint32];
var baseIndex = triangleIndex * threeUint;
var sampledIndex_A = new VFXExpressionSampleIndex(mesh, baseIndex, meshIndexFormat);
var sampledIndex_B = new VFXExpressionSampleIndex(mesh, baseIndex + VFXValue.Constant <uint>(1u), meshIndexFormat);
var sampledIndex_C = new VFXExpressionSampleIndex(mesh, baseIndex + VFXValue.Constant <uint>(2u), meshIndexFormat);
var allInputValues = new List <VFXExpression>();
var sampling_A = SampleVertexAttribute(source, sampledIndex_A, vertexAttributes).ToArray();
var sampling_B = SampleVertexAttribute(source, sampledIndex_B, vertexAttributes).ToArray();
var sampling_C = SampleVertexAttribute(source, sampledIndex_C, vertexAttributes).ToArray();
VFXExpression barycentricCoordinates = null;
var one = VFXOperatorUtility.OneExpression[UnityEngine.VFX.VFXValueType.Float];
if (coordMode == SurfaceCoordinates.Barycentric)
{
var barycentricCoordinateInput = coord;
barycentricCoordinates = new VFXExpressionCombine(barycentricCoordinateInput.x, barycentricCoordinateInput.y, one - barycentricCoordinateInput.x - barycentricCoordinateInput.y);
}
else if (coordMode == SurfaceCoordinates.Uniform)
{
//https://hal.archives-ouvertes.fr/hal-02073696v2/document
var input = coord;
var half2 = VFXOperatorUtility.HalfExpression[UnityEngine.VFX.VFXValueType.Float2];
var zero = VFXOperatorUtility.ZeroExpression[UnityEngine.VFX.VFXValueType.Float];
var t = input * half2;
var offset = t.y - t.x;
var pred = new VFXExpressionCondition(UnityEngine.VFX.VFXValueType.Float, VFXCondition.Greater, offset, zero);
var t2 = new VFXExpressionBranch(pred, t.y + offset, t.y);
var t1 = new VFXExpressionBranch(pred, t.x, t.x - offset);
var t3 = one - t2 - t1;
barycentricCoordinates = new VFXExpressionCombine(t1, t2, t3);
/* Possible variant See http://inis.jinr.ru/sl/vol1/CMC/Graphics_Gems_1,ed_A.Glassner.pdf (p24) uniform distribution from two numbers in triangle generating barycentric coordinate
* var input = VFXOperatorUtility.Saturate(inputExpression[2]);
* var s = input.x;
* var t = VFXOperatorUtility.Sqrt(input.y);
* var a = one - t;
* var b = (one - s) * t;
* var c = s * t;
* barycentricCoordinates = new VFXExpressionCombine(a, b, c);
*/
}
else
{
throw new InvalidOperationException("No supported surfaceCoordinates : " + coord);
}
for (int i = 0; i < vertexAttributes.Count(); ++i)
{
var outputValueType = sampling_A[i].valueType;
var barycentricCoordinateX = VFXOperatorUtility.CastFloat(barycentricCoordinates.x, outputValueType);
var barycentricCoordinateY = VFXOperatorUtility.CastFloat(barycentricCoordinates.y, outputValueType);
var barycentricCoordinateZ = VFXOperatorUtility.CastFloat(barycentricCoordinates.z, outputValueType);
var r = sampling_A[i] * barycentricCoordinateX + sampling_B[i] * barycentricCoordinateY + sampling_C[i] * barycentricCoordinateZ;
yield return(r);
}
}
protected override sealed VFXExpression[] BuildExpression(VFXExpression[] inputExpression)
{
VFXExpression[] rgb = VFXOperatorUtility.ExtractComponents(new VFXExpressionHSVtoRGB(inputExpression[0])).Take(3).ToArray();
return(new[] { new VFXExpressionCombine(new[] { rgb[0], rgb[1], rgb[2], VFXValue.Constant(1.0f) }) });
}
protected override VFXExpression[] BuildExpression(VFXExpression[] inputExpression)
{
VFXExpression clamped = VFXOperatorUtility.Clamp(inputExpression[0], inputExpression[1], inputExpression[2]);
return(new[] { VFXOperatorUtility.Fit(clamped, inputExpression[1], inputExpression[2], inputExpression[3], inputExpression[4]) });
}
protected override sealed VFXExpression[] BuildExpression(VFXExpression[] inputExpression)
{
return(new VFXExpression[] { VFXOperatorUtility.ConeVolume(inputExpression[1], inputExpression[2], inputExpression[3]) });
}
protected override sealed VFXExpression[] BuildExpression(VFXExpression[] inputExpression)
{
return(new[] { VFXOperatorUtility.SphericalToRectangular(inputExpression[0], inputExpression[1], inputExpression[2]) });
}
protected override sealed VFXExpression[] BuildExpression(VFXExpression[] inputExpression)
{
return(new[] { VFXOperatorUtility.PolarToRectangular(VFXOperatorUtility.DegToRad(inputExpression[0]), inputExpression[1]) });
}
protected override sealed VFXExpression[] BuildExpression(VFXExpression[] inputExpression)
{
var expressions = Block.CameraHelper.AddCameraExpressions(GetExpressionsFromSlots(this), camera);
// camera matrix is already in world even in custom mode due to GetOutputSpaceFromSlot returning world space
Block.CameraMatricesExpressions matricesExpressions = Block.CameraHelper.GetMatricesExpressions(expressions, VFXCoordinateSpace.World, VFXCoordinateSpace.World);
// result = position * VFXToView * ViewToClip
VFXExpression positionExpression = inputExpression[0];
VFXExpression viewPosExpression = new VFXExpressionTransformPosition(matricesExpressions.VFXToView.exp, positionExpression);
VFXExpression clipPosExpression = new VFXExpressionTransformVector4(matricesExpressions.ViewToClip.exp, VFXOperatorUtility.CastFloat(viewPosExpression, VFXValueType.Float4, 1.0f));
// normalize using w component and renormalize to range [0, 1]
VFXExpression halfExpression = VFXValue.Constant(0.5f);
VFXExpression normalizedExpression = new VFXExpressionCombine(new VFXExpression[]
{
(clipPosExpression.x / clipPosExpression.w) * halfExpression + halfExpression,
(clipPosExpression.y / clipPosExpression.w) * halfExpression + halfExpression,
viewPosExpression.z // The z position is in world units from the camera
});
return(new VFXExpression[]
{
normalizedExpression
});
}
protected override sealed VFXExpression[] BuildExpression(VFXExpression[] inputExpression)
{
return(VFXOperatorUtility.RectangularToPolar(inputExpression[0]));
}
protected override VFXExpression[] BuildExpression(VFXExpression[] inputExpression)
{
var type = inputExpression[0].valueType;
VFXExpression input;
if (Clamp)
{
input = VFXOperatorUtility.Saturate(inputExpression[0]);
}
else
{
input = inputExpression[0];
}
return(new[] { VFXOperatorUtility.Mad(input, VFXOperatorUtility.TwoExpression[type], VFXOperatorUtility.Negate(VFXOperatorUtility.OneExpression[type])) });
}
protected override sealed VFXExpression[] BuildExpression(VFXExpression[] inputExpression)
{
var expression = inputExpression[0];
return(new[] { VFXOperatorUtility.Reciprocal(expression) });
}
protected override VFXExpression[] BuildExpression(VFXExpression[] inputExpression)
{
// Offset to compensate for the numerous custom camera generated expressions
_customCameraOffset = 0;
// Get the extra number of expressions if a custom camera input is used
if (camera == CameraMode.Custom)
{
_customCameraOffset = GetInputSlot(0).children.Count() - 1;
}
// List to gather all output expressions as their number can vary
List <VFXExpression> outputs = new List <VFXExpression>();
// Camera expressions
var expressions = Block.CameraHelper.AddCameraExpressions(GetExpressionsFromSlots(this), camera);
Block.CameraMatricesExpressions camMatrices = Block.CameraHelper.GetMatricesExpressions(expressions);
var Camera_depthBuffer = expressions.First(e => e.name == "Camera_depthBuffer").exp;
var CamPixDim = expressions.First(e => e.name == "Camera_pixelDimensions").exp;
// Set uvs
VFXExpression uv = VFXValue.Constant <Vector2>();
// Determine how the particles are spawned on the screen
switch (mode)
{
case PositionMode.Random:
// Random UVs
uv = new VFXExpressionCombine(VFXOperatorUtility.FixedRandom(0, VFXSeedMode.PerParticle), VFXOperatorUtility.FixedRandom(1, VFXSeedMode.PerParticle));
break;
case PositionMode.Sequential:
// Pixel perfect spawn
VFXExpression gridStep = inputExpression[inputSlots.IndexOf(inputSlots.First(o => o.name == "GridStep")) + _customCameraOffset];
VFXExpression sSizeX = new VFXExpressionCastFloatToUint(CamPixDim.x / new VFXExpressionCastUintToFloat(gridStep));
VFXExpression sSizeY = new VFXExpressionCastFloatToUint(CamPixDim.y / new VFXExpressionCastUintToFloat(gridStep));
VFXExpression nbPixels = sSizeX * sSizeY;
VFXExpression particleID = new VFXAttributeExpression(VFXAttribute.ParticleId);
VFXExpression id = VFXOperatorUtility.Modulo(particleID, nbPixels);
VFXExpression shift = new VFXExpressionBitwiseRightShift(gridStep, VFXValue.Constant <uint>(1));
VFXExpression U = VFXOperatorUtility.Modulo(id, sSizeX) * gridStep + shift;
VFXExpression V = id / sSizeX * gridStep + shift;
VFXExpression ids = new VFXExpressionCombine(new VFXExpressionCastUintToFloat(U), new VFXExpressionCastUintToFloat(V));
uv = new VFXExpressionDivide(ids + VFXOperatorUtility.CastFloat(VFXValue.Constant(0.5f), VFXValueType.Float2), CamPixDim);
break;
case PositionMode.Custom:
// Custom UVs
uv = inputExpression[inputSlots.IndexOf(inputSlots.FirstOrDefault(o => o.name == "UVSpawn")) + _customCameraOffset];
break;
}
VFXExpression projpos = uv * VFXValue.Constant <Vector2>(new Vector2(2f, 2f)) - VFXValue.Constant <Vector2>(Vector2.one);
VFXExpression uvs = new VFXExpressionCombine(uv.x * CamPixDim.x, uv.y * CamPixDim.y, VFXValue.Constant(0f), VFXValue.Constant(0f));
// Get depth
VFXExpression depth = new VFXExpressionExtractComponent(new VFXExpressionLoadTexture2DArray(Camera_depthBuffer, uvs), 0);
if (SystemInfo.usesReversedZBuffer)
{
depth = VFXOperatorUtility.OneExpression[depth.valueType] - depth;
}
VFXExpression isAlive = VFXValue.Constant(true);
// Determine how the particles are culled
switch (cullMode)
{
case CullMode.None:
// do nothing
break;
case CullMode.Range:
VFXExpression depthRange = inputExpression[inputSlots.IndexOf(inputSlots.LastOrDefault(o => o.name == "DepthRange")) + _customCameraOffset];
VFXExpression nearRangeCheck = new VFXExpressionCondition(VFXCondition.Less, depth, depthRange.x);
VFXExpression farRangeCheck = new VFXExpressionCondition(VFXCondition.Greater, depth, depthRange.y);
VFXExpression logicOr = new VFXExpressionLogicalOr(nearRangeCheck, farRangeCheck);
isAlive = new VFXExpressionBranch(logicOr, VFXValue.Constant(false), VFXValue.Constant(true));
break;
case CullMode.FarPlane:
VFXExpression farPlaneCheck = new VFXExpressionCondition(VFXCondition.GreaterOrEqual, depth, VFXValue.Constant(1f) - VFXValue.Constant(Mathf.Epsilon));
isAlive = new VFXExpressionBranch(farPlaneCheck, VFXValue.Constant(false), VFXValue.Constant(true));
break;
}
VFXExpression zMultiplier = inputExpression[inputSlots.IndexOf(inputSlots.First(o => o.name == "ZMultiplier")) + _customCameraOffset];
VFXExpression clipPos = new VFXExpressionCombine(projpos.x, projpos.y,
depth * zMultiplier * VFXValue.Constant(2f) - VFXValue.Constant(1f),
VFXValue.Constant(1f)
);
VFXExpression clipToVFX = new VFXExpressionTransformMatrix(camMatrices.ViewToVFX.exp, camMatrices.ClipToView.exp);
VFXExpression vfxPos = new VFXExpressionTransformVector4(clipToVFX, clipPos);
VFXExpression position = new VFXExpressionCombine(vfxPos.x, vfxPos.y, vfxPos.z) / VFXOperatorUtility.CastFloat(vfxPos.w, VFXValueType.Float3);
VFXExpression color = VFXValue.Constant <Vector4>();
// Assigning the color output to the corresponding color buffer value
if (inheritSceneColor)
{
VFXExpression Camera_colorBuffer = expressions.First(e => e.name == "Camera_colorBuffer").exp;
VFXExpression tempColor = new VFXExpressionLoadTexture2DArray(Camera_colorBuffer, uvs);
color = new VFXExpressionCombine(tempColor.x, tempColor.y, tempColor.z, VFXValue.Constant(1.0f));
}
// Add expressions in the right output order
outputs.Add(position);
if (inheritSceneColor)
{
outputs.Add(color);
}
if (cullMode != CullMode.None)
{
outputs.Add(isAlive);
}
return(outputs.ToArray());
}
protected override sealed VFXExpression[] BuildExpression(VFXExpression[] inputExpression)
{
return(new VFXExpression[] { VFXOperatorUtility.BoxVolume(new VFXExpressionExtractScaleFromMatrix(inputExpression[0])) });
}
protected override sealed VFXExpression[] BuildExpression(VFXExpression[] inputExpression)
{
VFXExpression parameters = new VFXExpressionCombine(inputExpression[1], inputExpression[3], inputExpression[4]);
VFXExpression rangeMultiplier = (inputExpression[5].y - inputExpression[5].x);
VFXExpression result;
VFXExpression rangeMin = VFXValue.Constant(0.0f);
VFXExpression rangeMax = VFXValue.Constant(1.0f);
if (dimensions == DimensionCount.One)
{
if (type == NoiseType.Value)
{
result = new VFXExpressionValueNoise1D(inputExpression[0], parameters, inputExpression[2]);
}
else if (type == NoiseType.Perlin)
{
result = new VFXExpressionPerlinNoise1D(inputExpression[0], parameters, inputExpression[2]);
rangeMin = VFXValue.Constant(-1.0f);
}
else
{
result = new VFXExpressionCellularNoise1D(inputExpression[0], parameters, inputExpression[2]);
}
VFXExpression x = VFXOperatorUtility.Fit(result.x, rangeMin, rangeMax, inputExpression[5].x, inputExpression[5].y);
VFXExpression y = result.y * rangeMultiplier;
return(new[] { x, y });
}
else if (dimensions == DimensionCount.Two)
{
if (type == NoiseType.Value)
{
result = new VFXExpressionValueNoise2D(inputExpression[0], parameters, inputExpression[2]);
}
else if (type == NoiseType.Perlin)
{
result = new VFXExpressionPerlinNoise2D(inputExpression[0], parameters, inputExpression[2]);
rangeMin = VFXValue.Constant(-1.0f);
}
else
{
result = new VFXExpressionCellularNoise2D(inputExpression[0], parameters, inputExpression[2]);
}
VFXExpression x = VFXOperatorUtility.Fit(result.x, rangeMin, rangeMax, inputExpression[5].x, inputExpression[5].y);
VFXExpression y = result.y * rangeMultiplier;
VFXExpression z = result.z * rangeMultiplier;
return(new[] { x, new VFXExpressionCombine(y, z) });
}
else
{
if (type == NoiseType.Value)
{
result = new VFXExpressionValueNoise3D(inputExpression[0], parameters, inputExpression[2]);
}
else if (type == NoiseType.Perlin)
{
result = new VFXExpressionPerlinNoise3D(inputExpression[0], parameters, inputExpression[2]);
rangeMin = VFXValue.Constant(-1.0f);
}
else
{
result = new VFXExpressionCellularNoise3D(inputExpression[0], parameters, inputExpression[2]);
}
VFXExpression x = VFXOperatorUtility.Fit(result.x, rangeMin, rangeMax, inputExpression[5].x, inputExpression[5].y);
VFXExpression y = result.y * rangeMultiplier;
VFXExpression z = result.z * rangeMultiplier;
VFXExpression w = result.w * rangeMultiplier;
return(new[] { x, new VFXExpressionCombine(y, z, w) });
}
}
protected override sealed VFXExpression[] BuildExpression(VFXExpression[] inputExpression)
{
return(new[] { VFXOperatorUtility.Lerp(inputExpression[0], inputExpression[1], inputExpression[2]) });
}
protected override sealed VFXExpression[] BuildExpression(VFXExpression[] inputExpression)
{
return(new[] { VFXOperatorUtility.ColorLuma(inputExpression[0]) });
}
