protected override sealed VFXExpression[] BuildExpression(VFXExpression[] inputExpression)
{
VFXExpression height = new VFXExpressionTextureHeight(inputExpression[1]);
VFXExpression width = new VFXExpressionTextureWidth(inputExpression[1]);
VFXExpression u_index = VFXOperatorUtility.ApplyAddressingMode(inputExpression[2], new VFXExpressionMin(height * width, inputExpression[0]), mode);
VFXExpression y = u_index / width;
VFXExpression x = u_index - (y * width);
Type outputType = GetOperandType();
var type = typeof(VFXExpressionSampleAttributeMap <>).MakeGenericType(outputType);
var outputExpr = Activator.CreateInstance(type, new object[] { inputExpression[1], x, y });
return(new[] { (VFXExpression)outputExpr });
}
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);
}
