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framework/scene_graph/components/material.h

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+/* Copyright (c) 2018-2024, Arm Limited and Contributors
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 the "License";
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <memory>
+#include <string>
+#include <typeinfo>
+#include <unordered_map>
+#include <vector>
+
+#include "common/error.h"
+
+#include "common/glm_common.h"
+
+#include "scene_graph/component.h"
+
+namespace vkb
+{
+namespace sg
+{
+class Texture;
+
+/**
+ * @brief How the alpha value of the main factor and texture should be interpreted
+ */
+enum class AlphaMode
+{
+	/// Alpha value is ignored
+	Opaque,
+	/// Either full opaque or fully transparent
+	Mask,
+	/// Output is combined with the background
+	Blend
+};
+
+class Material : public Component
+{
+  public:
+	Material(const std::string &name);
+
+	Material(Material &&other) = default;
+
+	virtual ~Material() = default;
+
+	virtual std::type_index get_type() override;
+
+	std::unordered_map<std::string, Texture *> textures;
+
+	/// Emissive color of the material
+	glm::vec3 emissive{0.0f, 0.0f, 0.0f};
+
+	/// Whether the material is double sided
+	bool double_sided{false};
+
+	/// Cutoff threshold when in Mask mode
+	float alpha_cutoff{0.5f};
+
+	/// Alpha rendering mode
+	AlphaMode alpha_mode{AlphaMode::Opaque};
+};
+
+}        // namespace sg
+}        // namespace vkb