Shader: Add Discard node

src/ShaderNode/DataModels/Discard.cpp

@@ -0,0 +1,56 @@
+#include <ShaderNode/DataModels/Discard.hpp>
+#include <Nazara/Shader/ShaderBuilder.hpp>
+#include <ShaderNode/ShaderGraph.hpp>
+#include <ShaderNode/DataTypes/BoolData.hpp>
+#include <ShaderNode/DataTypes/FloatData.hpp>
+#include <ShaderNode/DataTypes/Matrix4Data.hpp>
+#include <ShaderNode/DataTypes/VecData.hpp>
+#include <QtWidgets/QComboBox>
+#include <QtWidgets/QFormLayout>
+#include <limits>
+
+Discard::Discard(ShaderGraph& graph) :
+ShaderNode(graph)
+{
+	DisablePreview();
+	DisableCustomVariableName();
+}
+
+Nz::ShaderNodes::NodePtr Discard::BuildNode(Nz::ShaderNodes::ExpressionPtr* expressions, std::size_t count, std::size_t outputIndex) const
+{
+	using namespace Nz::ShaderBuilder;
+
+	assert(count == 1);
+	assert(outputIndex == 0);
+
+	return Branch(Equal(expressions[0], Constant(true)), Nz::ShaderBuilder::Discard(), nullptr);
+}
+
+int Discard::GetOutputOrder() const
+{
+	return std::numeric_limits<int>::lowest();
+}
+
+QtNodes::NodeDataType Discard::dataType(QtNodes::PortType portType, QtNodes::PortIndex portIndex) const
+{
+	assert(portType == QtNodes::PortType::In);
+	assert(portIndex == 0);
+
+	return BoolData::Type();
+}
+
+unsigned int Discard::nPorts(QtNodes::PortType portType) const
+{
+	switch (portType)
+	{
+		case QtNodes::PortType::In: return 1;
+		case QtNodes::PortType::Out: return 0;
+	}
+
+	return 0;
+}
+
+std::shared_ptr<QtNodes::NodeData> Discard::outData(QtNodes::PortIndex port)
+{
+	return {};
+}